diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 3480d63..c71c4a0 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -19,6 +19,7 @@
                libs/gui/
                libs/input/
                libs/nativedisplay/
+               libs/nativewindow/
                libs/renderengine/
                libs/ui/
                libs/vr/
diff --git a/cmds/atrace/README.md b/cmds/atrace/README.md
new file mode 100644
index 0000000..faa43b2
--- /dev/null
+++ b/cmds/atrace/README.md
@@ -0,0 +1,48 @@
+# Atrace categories
+
+The atrace command (and the perfetto configuration) allow listing **categories**
+to select subsets of events to be traced.
+
+Each category can include some userspace events and some ftrace events.
+
+## Vendor categories
+
+It's possible to extend exiting categories (or to define new categories) from
+the /vendor partition in order to add hardware specific ftrace events.
+
+Since android 14, if the file `/vendor/etc/atrace/atrace_categories.txt`, atrace
+and perfetto will consider the categories and ftrace events listed there.
+
+The file contains a list of categories, and for each category (on the following
+lines, indented with one or more spaces of time), a list of ftrace events that
+should be enabled when the category is enabled.
+
+Each ftrace event should be a subdirectory in `/sys/kernel/tracing/events/` and
+should be of the form `group/event`. Listing a whole group is not supported,
+each event needs to be listed explicitly.
+
+It is not an error if an ftrace event is listed in the file, but not present on
+the tracing file system.
+
+Example:
+
+```
+gfx
+ mali/gpu_power_state
+ mali/mali_pm_status
+thermal_tj
+ thermal_exynos/thermal_cpu_pressure
+ thermal_exynos/thermal_exynos_arm_update
+```
+
+The file lists two categories (`gfx` and `thermal_tj`). When the `gfx` category
+is enabled, atrace (or perfetto) will enable
+`/sys/kernel/tracing/events/mali/gpu_power_state` and
+`/sys/kernel/tracing/events/mali/mali_pm_status`. When the `thermal_tj` category
+is enabled, atrace (or perfetto) will enable
+`/sys/kernel/tracing/events/thermal_exynos/thermal_cpu_pressure` and
+`/sys/kernel/tracing/events/thermal_exynos/thermal_exynos_arm_update`.
+
+Since android 14, if the file `/vendor/etc/atrace/atrace_categories.txt` exists
+on the file system, perfetto and atrace do not query the android.hardware.atrace
+HAL (which is deprecated).
diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 48d48ac..8105626 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -49,6 +49,7 @@
 #include <android-base/file.h>
 #include <android-base/macros.h>
 #include <android-base/properties.h>
+#include <android-base/strings.h>
 #include <android-base/stringprintf.h>
 
 using namespace android;
@@ -62,7 +63,7 @@
 
 using std::string;
 
-#define MAX_SYS_FILES 12
+#define MAX_SYS_FILES 13
 
 const char* k_traceTagsProperty = "debug.atrace.tags.enableflags";
 const char* k_userInitiatedTraceProperty = "debug.atrace.user_initiated";
@@ -73,7 +74,9 @@
 const char* k_pdxServiceCategory = "pdx";
 const char* k_coreServicesProp = "ro.atrace.core.services";
 
-typedef enum { OPT, REQ } requiredness  ;
+const char* kVendorCategoriesPath = "/vendor/etc/atrace/atrace_categories.txt";
+
+typedef enum { OPT, REQ } requiredness;
 
 struct TracingCategory {
     // The name identifying the category.
@@ -189,6 +192,8 @@
         { OPT,      "events/f2fs/f2fs_sync_file_exit/enable" },
         { OPT,      "events/f2fs/f2fs_write_begin/enable" },
         { OPT,      "events/f2fs/f2fs_write_end/enable" },
+        { OPT,      "events/f2fs/f2fs_iostat/enable" },
+        { OPT,      "events/f2fs/f2fs_iostat_latency/enable" },
         { OPT,      "events/ext4/ext4_da_write_begin/enable" },
         { OPT,      "events/ext4/ext4_da_write_end/enable" },
         { OPT,      "events/ext4/ext4_sync_file_enter/enable" },
@@ -253,7 +258,20 @@
     } },
 };
 
-struct TracingVendorCategory {
+// A category in the vendor categories file.
+struct TracingVendorFileCategory {
+    // The name identifying the category.
+    std::string name;
+
+    // If the category is enabled through command.
+    bool enabled = false;
+
+    // Paths to the ftrace enable files (relative to g_traceFolder).
+    std::vector<std::string> ftrace_enable_paths;
+};
+
+// A category in the vendor HIDL HAL.
+struct TracingVendorHalCategory {
     // The name identifying the category.
     std::string name;
 
@@ -263,11 +281,8 @@
     // If the category is enabled through command.
     bool enabled;
 
-    TracingVendorCategory(string &&name, string &&description, bool enabled)
-            : name(std::move(name))
-            , description(std::move(description))
-            , enabled(enabled)
-    {}
+    TracingVendorHalCategory(string&& name, string&& description, bool enabled)
+          : name(std::move(name)), description(std::move(description)), enabled(enabled) {}
 };
 
 /* Command line options */
@@ -287,8 +302,9 @@
 static bool g_traceAborted = false;
 static bool g_categoryEnables[arraysize(k_categories)] = {};
 static std::string g_traceFolder;
+static std::vector<TracingVendorFileCategory> g_vendorFileCategories;
 static sp<IAtraceDevice> g_atraceHal;
-static std::vector<TracingVendorCategory> g_vendorCategories;
+static std::vector<TracingVendorHalCategory> g_vendorHalCategories;
 
 /* Sys file paths */
 static const char* k_traceClockPath =
@@ -645,6 +661,13 @@
             }
         }
     }
+    for (const TracingVendorFileCategory& c : g_vendorFileCategories) {
+        for (const std::string& path : c.ftrace_enable_paths) {
+            if (fileIsWritable(path.c_str())) {
+                ok &= setKernelOptionEnable(path.c_str(), false);
+            }
+        }
+    }
     return ok;
 }
 
@@ -724,7 +747,13 @@
 static bool setCategoryEnable(const char* name)
 {
     bool vendor_found = false;
-    for (auto &c : g_vendorCategories) {
+    for (auto& c : g_vendorFileCategories) {
+        if (strcmp(name, c.name.c_str()) == 0) {
+            c.enabled = true;
+            vendor_found = true;
+        }
+    }
+    for (auto& c : g_vendorHalCategories) {
         if (strcmp(name, c.name.c_str()) == 0) {
             c.enabled = true;
             vendor_found = true;
@@ -870,6 +899,16 @@
         }
     }
 
+    for (const TracingVendorFileCategory& c : g_vendorFileCategories) {
+        if (c.enabled) {
+            for (const std::string& path : c.ftrace_enable_paths) {
+                if (fileIsWritable(path.c_str())) {
+                    ok &= setKernelOptionEnable(path.c_str(), true);
+                }
+            }
+        }
+    }
+
     return ok;
 }
 
@@ -1055,7 +1094,10 @@
             printf("  %10s - %s\n", c.name, c.longname);
         }
     }
-    for (const auto &c : g_vendorCategories) {
+    for (const auto& c : g_vendorFileCategories) {
+        printf("  %10s - (VENDOR)\n", c.name.c_str());
+    }
+    for (const auto& c : g_vendorHalCategories) {
         printf("  %10s - %s (HAL)\n", c.name.c_str(), c.description.c_str());
     }
 }
@@ -1114,8 +1156,38 @@
     return true;
 }
 
-void initVendorCategories()
-{
+void initVendorCategoriesFromFile() {
+    std::ifstream is(kVendorCategoriesPath);
+    for (std::string line; std::getline(is, line);) {
+        if (line.empty()) {
+            continue;
+        }
+        if (android::base::StartsWith(line, ' ') || android::base::StartsWith(line, '\t')) {
+            if (g_vendorFileCategories.empty()) {
+                fprintf(stderr, "Malformed vendor categories file\n");
+                exit(1);
+                return;
+            }
+            std::string_view path = std::string_view(line).substr(1);
+            while (android::base::StartsWith(path, ' ') || android::base::StartsWith(path, '\t')) {
+                path.remove_prefix(1);
+            }
+            if (path.empty()) {
+                continue;
+            }
+            std::string enable_path = "events/";
+            enable_path += path;
+            enable_path += "/enable";
+            g_vendorFileCategories.back().ftrace_enable_paths.push_back(std::move(enable_path));
+        } else {
+            TracingVendorFileCategory cat;
+            cat.name = line;
+            g_vendorFileCategories.push_back(std::move(cat));
+        }
+    }
+}
+
+void initVendorCategoriesFromHal() {
     g_atraceHal = IAtraceDevice::getService();
 
     if (g_atraceHal == nullptr) {
@@ -1123,27 +1195,34 @@
         return;
     }
 
-    Return<void> ret = g_atraceHal->listCategories(
-        [](const auto& list) {
-            g_vendorCategories.reserve(list.size());
-            for (const auto& category : list) {
-                g_vendorCategories.emplace_back(category.name, category.description, false);
-            }
-        });
+    Return<void> ret = g_atraceHal->listCategories([](const auto& list) {
+        g_vendorHalCategories.reserve(list.size());
+        for (const auto& category : list) {
+            g_vendorHalCategories.emplace_back(category.name, category.description, false);
+        }
+    });
     if (!ret.isOk()) {
         fprintf(stderr, "calling atrace HAL failed: %s\n", ret.description().c_str());
     }
 }
 
-static bool setUpVendorTracing()
-{
+void initVendorCategories() {
+    // If kVendorCategoriesPath exists on the filesystem, do not use the HAL.
+    if (access(kVendorCategoriesPath, F_OK) != -1) {
+        initVendorCategoriesFromFile();
+    } else {
+        initVendorCategoriesFromHal();
+    }
+}
+
+static bool setUpVendorTracingWithHal() {
     if (g_atraceHal == nullptr) {
         // No atrace HAL
         return true;
     }
 
     std::vector<hidl_string> categories;
-    for (const auto &c : g_vendorCategories) {
+    for (const auto& c : g_vendorHalCategories) {
         if (c.enabled) {
             categories.emplace_back(c.name);
         }
@@ -1164,15 +1243,14 @@
     return true;
 }
 
-static bool cleanUpVendorTracing()
-{
+static bool cleanUpVendorTracingWithHal() {
     if (g_atraceHal == nullptr) {
         // No atrace HAL
         return true;
     }
 
-    if (!g_vendorCategories.size()) {
-        // No vendor categories
+    if (!g_vendorHalCategories.size()) {
+        // No vendor HAL categories
         return true;
     }
 
@@ -1326,7 +1404,7 @@
 
     if (ok && traceStart && !onlyUserspace) {
         ok &= setUpKernelTracing();
-        ok &= setUpVendorTracing();
+        ok &= setUpVendorTracingWithHal();
         ok &= startTrace();
     }
 
@@ -1397,7 +1475,7 @@
     if (traceStop) {
         cleanUpUserspaceTracing();
         if (!onlyUserspace) {
-            cleanUpVendorTracing();
+            cleanUpVendorTracingWithHal();
             cleanUpKernelTracing();
         }
     }
diff --git a/data/etc/android.software.ipsec_tunnel_migration.xml b/data/etc/android.software.ipsec_tunnel_migration.xml
new file mode 100644
index 0000000..c405e1e
--- /dev/null
+++ b/data/etc/android.software.ipsec_tunnel_migration.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2022 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<!--
+     This is the feature indicating that the device has support for updating
+     source and destination addresses of IPsec tunnels
+-->
+
+<permissions>
+    <feature name="android.software.ipsec_tunnel_migration" />
+</permissions>
diff --git a/include/android/keycodes.h b/include/android/keycodes.h
index e5b5db2..d4ba321 100644
--- a/include/android/keycodes.h
+++ b/include/android/keycodes.h
@@ -829,6 +829,8 @@
     AKEYCODE_STYLUS_BUTTON_TERTIARY = 310,
     /** A button on the tail end of a stylus. */
     AKEYCODE_STYLUS_BUTTON_TAIL = 311,
+    /** Key to open recent apps (a.k.a. Overview) */
+    AKEYCODE_RECENT_APPS = 312,
 
     // NOTE: If you add a new keycode here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.
diff --git a/include/android/performance_hint.h b/include/android/performance_hint.h
index eed6b33..4a5bd5e 100644
--- a/include/android/performance_hint.h
+++ b/include/android/performance_hint.h
@@ -88,36 +88,6 @@
 typedef struct APerformanceHintSession APerformanceHintSession;
 
 /**
- * Hints for the session used by {@link APerformanceHint_sendHint} to signal upcoming changes
- * in the mode or workload.
- */
-enum SessionHint {
-    /**
-     * This hint indicates a sudden increase in CPU workload intensity. It means
-     * that this hint session needs extra CPU resources immediately to meet the
-     * target duration for the current work cycle.
-     */
-    CPU_LOAD_UP = 0,
-    /**
-     * This hint indicates a decrease in CPU workload intensity. It means that
-     * this hint session can reduce CPU resources and still meet the target duration.
-     */
-    CPU_LOAD_DOWN = 1,
-    /*
-     * This hint indicates an upcoming CPU workload that is completely changed and
-     * unknown. It means that the hint session should reset CPU resources to a known
-     * baseline to prepare for an arbitrary load, and must wake up if inactive.
-     */
-    CPU_LOAD_RESET = 2,
-    /*
-     * This hint indicates that the most recent CPU workload is resuming after a
-     * period of inactivity. It means that the hint session should allocate similar
-     * CPU resources to what was used previously, and must wake up if inactive.
-     */
-    CPU_LOAD_RESUME = 3,
-};
-
-/**
   * Acquire an instance of the performance hint manager.
   *
   * @return manager instance on success, nullptr on failure.
@@ -190,15 +160,21 @@
         APerformanceHintSession* session) __INTRODUCED_IN(__ANDROID_API_T__);
 
 /**
- * Sends performance hints to inform the hint session of changes in the workload.
+ * Set a list of threads to the performance hint session. This operation will replace
+ * the current list of threads with the given list of threads.
  *
- * @param session The performance hint session instance to update.
- * @param hint The hint to send to the session.
- * @return 0 on success
+ * @param session The performance hint session instance for the threads.
+ * @param threadIds The list of threads to be associated with this session. They must be part of
+ *     this app's thread group.
+ * @param size the size of the list of threadIds.
+ * @return 0 on success.
+ *         EINVAL if the list of thread ids is empty or if  any of the thread ids is not part of the thread group.
  *         EPIPE if communication with the system service has failed.
  */
-int APerformanceHint_sendHint(
-        APerformanceHintSession* session, int hint) __INTRODUCED_IN(__ANDROID_API_U__);
+int APerformanceHint_setThreads(
+        APerformanceHintSession* session,
+        const int32_t* threadIds,
+        size_t size) __INTRODUCED_IN(__ANDROID_API_U__);
 
 __END_DECLS
 
diff --git a/include/audiomanager/AudioManager.h b/include/audiomanager/AudioManager.h
index 6794fbf..43048db 100644
--- a/include/audiomanager/AudioManager.h
+++ b/include/audiomanager/AudioManager.h
@@ -40,9 +40,17 @@
     PLAYER_UPDATE_DEVICE_ID = 5,
     PLAYER_UPDATE_PORT_ID = 6,
     PLAYER_UPDATE_MUTED = 7,
+    PLAYER_UPDATE_FORMAT = 8,
 } player_state_t;
 
 static constexpr char
+    kExtraPlayerEventSpatializedKey[] = "android.media.extra.PLAYER_EVENT_SPATIALIZED";
+static constexpr char
+    kExtraPlayerEventSampleRateKey[] = "android.media.extra.PLAYER_EVENT_SAMPLE_RATE";
+static constexpr char
+    kExtraPlayerEventChannelMaskKey[] = "android.media.extra.PLAYER_EVENT_CHANNEL_MASK";
+
+static constexpr char
     kExtraPlayerEventMuteKey[] = "android.media.extra.PLAYER_EVENT_MUTE";
 enum {
     PLAYER_MUTE_MASTER = (1 << 0),
diff --git a/include/input/Input.h b/include/input/Input.h
index 015efdd..1a35196 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -203,6 +203,13 @@
  */
 vec2 transformWithoutTranslation(const ui::Transform& transform, const vec2& xy);
 
+/*
+ * Transform an angle on the x-y plane. An angle of 0 radians corresponds to "north" or
+ * pointing upwards in the negative Y direction, a positive angle points towards the right, and a
+ * negative angle points towards the left.
+ */
+float transformAngle(const ui::Transform& transform, float angleRadians);
+
 const char* inputEventTypeToString(int32_t type);
 
 std::string inputEventSourceToString(int32_t source);
diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index e911734..5fa9fda 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -205,6 +205,16 @@
     int32_t id;
 };
 
+struct KeyboardLayoutInfo {
+    explicit KeyboardLayoutInfo(std::string languageTag, std::string layoutType)
+          : languageTag(languageTag), layoutType(layoutType) {}
+
+    // A BCP 47 conformant language tag such as "en-US".
+    std::string languageTag;
+    // The layout type such as QWERTY or AZERTY.
+    std::string layoutType;
+};
+
 /*
  * Describes the characteristics and capabilities of an input device.
  */
@@ -256,6 +266,11 @@
     void setKeyboardType(int32_t keyboardType);
     inline int32_t getKeyboardType() const { return mKeyboardType; }
 
+    void setKeyboardLayoutInfo(KeyboardLayoutInfo keyboardLayoutInfo);
+    inline const std::optional<KeyboardLayoutInfo>& getKeyboardLayoutInfo() const {
+        return mKeyboardLayoutInfo;
+    }
+
     inline void setKeyCharacterMap(const std::shared_ptr<KeyCharacterMap> value) {
         mKeyCharacterMap = value;
     }
@@ -296,6 +311,7 @@
     bool mIsExternal;
     bool mHasMic;
     hardware::input::InputDeviceCountryCode mCountryCode;
+    std::optional<KeyboardLayoutInfo> mKeyboardLayoutInfo;
     uint32_t mSources;
     int32_t mKeyboardType;
     std::shared_ptr<KeyCharacterMap> mKeyCharacterMap;
diff --git a/include/input/KeyCharacterMap.h b/include/input/KeyCharacterMap.h
index dc928b8..867a089 100644
--- a/include/input/KeyCharacterMap.h
+++ b/include/input/KeyCharacterMap.h
@@ -125,14 +125,21 @@
     bool getEvents(int32_t deviceId, const char16_t* chars, size_t numChars,
             Vector<KeyEvent>& outEvents) const;
 
+    /* Maps an Android key code to another Android key code. This mapping is applied after scanCode
+     * and usageCodes are mapped to corresponding Android Keycode */
+    void addKeyRemapping(int32_t fromKeyCode, int32_t toKeyCode);
+
     /* Maps a scan code and usage code to a key code, in case this key map overrides
      * the mapping in some way. */
     status_t mapKey(int32_t scanCode, int32_t usageCode, int32_t* outKeyCode) const;
 
-    /* Tries to find a replacement key code for a given key code and meta state
-     * in character map. */
-    void tryRemapKey(int32_t scanCode, int32_t metaState,
-            int32_t* outKeyCode, int32_t* outMetaState) const;
+    /* Returns keycode after applying Android key code remapping defined in mKeyRemapping */
+    int32_t applyKeyRemapping(int32_t fromKeyCode) const;
+
+    /* Returns the <keyCode, metaState> pair after applying key behavior defined in the kcm file,
+     * that tries to find a replacement key code based on current meta state */
+    std::pair<int32_t /*keyCode*/, int32_t /*metaState*/> applyKeyBehavior(int32_t keyCode,
+                                                                           int32_t metaState) const;
 
 #ifdef __linux__
     /* Reads a key map from a parcel. */
@@ -227,8 +234,9 @@
     std::string mLoadFileName;
     bool mLayoutOverlayApplied;
 
-    KeyedVector<int32_t, int32_t> mKeysByScanCode;
-    KeyedVector<int32_t, int32_t> mKeysByUsageCode;
+    std::map<int32_t /* fromAndroidKeyCode */, int32_t /* toAndroidKeyCode */> mKeyRemapping;
+    std::map<int32_t /* fromScanCode */, int32_t /* toAndroidKeyCode */> mKeysByScanCode;
+    std::map<int32_t /* fromHidUsageCode */, int32_t /* toAndroidKeyCode */> mKeysByUsageCode;
 
     KeyCharacterMap(const std::string& filename);
 
diff --git a/include/input/MotionPredictor.h b/include/input/MotionPredictor.h
new file mode 100644
index 0000000..6c07849
--- /dev/null
+++ b/include/input/MotionPredictor.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android-base/thread_annotations.h>
+#include <android/sysprop/InputProperties.sysprop.h>
+#include <input/Input.h>
+
+namespace android {
+
+static inline bool isMotionPredictionEnabled() {
+    return sysprop::InputProperties::enable_motion_prediction().value_or(true);
+}
+
+/**
+ * Given a set of MotionEvents for the current gesture, predict the motion. The returned MotionEvent
+ * contains a set of samples in the future, up to "presentation time + offset".
+ *
+ * The typical usage is like this:
+ *
+ * MotionPredictor predictor(offset = MY_OFFSET);
+ * predictor.setExpectedPresentationTimeNanos(NEXT_PRESENT_TIME);
+ * predictor.record(DOWN_MOTION_EVENT);
+ * predictor.record(MOVE_MOTION_EVENT);
+ * prediction = predictor.predict();
+ *
+ * The presentation time should be set some time before calling .predict(). It could be set before
+ * or after the recorded motion events. Must be done on every frame.
+ *
+ * The resulting motion event will have eventTime <= (NEXT_PRESENT_TIME + MY_OFFSET). It might
+ * contain historical data, which are additional samples from the latest recorded MotionEvent's
+ * eventTime to the NEXT_PRESENT_TIME + MY_OFFSET.
+ *
+ * The offset is used to provide additional flexibility to the caller, in case the default present
+ * time (typically provided by the choreographer) does not account for some delays, or to simply
+ * reduce the aggressiveness of the prediction. Offset can be both positive and negative.
+ */
+class MotionPredictor {
+public:
+    /**
+     * Parameters:
+     * predictionTimestampOffsetNanos: additional, constant shift to apply to the target
+     * presentation time. The prediction will target the time t=(presentationTime +
+     * predictionTimestampOffsetNanos).
+     *
+     * checkEnableMotionPredition: the function to check whether the prediction should run. Used to
+     * provide an additional way of turning prediction on and off. Can be toggled at runtime.
+     */
+    MotionPredictor(nsecs_t predictionTimestampOffsetNanos,
+                    std::function<bool()> checkEnableMotionPrediction = isMotionPredictionEnabled);
+    void record(const MotionEvent& event);
+    std::vector<std::unique_ptr<MotionEvent>> predict();
+    bool isPredictionAvailable(int32_t deviceId, int32_t source);
+    void setExpectedPresentationTimeNanos(int64_t expectedPresentationTimeNanos);
+
+private:
+    std::mutex mLock;
+    int64_t mExpectedPresentationTimeNanos GUARDED_BY(mLock) = 0;
+    int64_t getExpectedPresentationTimeNanos();
+    std::vector<MotionEvent> mEvents;
+    const nsecs_t mPredictionTimestampOffsetNanos;
+    const std::function<bool()> mCheckMotionPredictionEnabled;
+};
+
+} // namespace android
diff --git a/include/private/performance_hint_private.h b/include/private/performance_hint_private.h
index f27f5f1..eaf3b5e 100644
--- a/include/private/performance_hint_private.h
+++ b/include/private/performance_hint_private.h
@@ -24,6 +24,51 @@
  */
 void APerformanceHint_setIHintManagerForTesting(void* iManager);
 
+/**
+ * Hints for the session used to signal upcoming changes in the mode or workload.
+ */
+enum SessionHint {
+    /**
+     * This hint indicates a sudden increase in CPU workload intensity. It means
+     * that this hint session needs extra CPU resources immediately to meet the
+     * target duration for the current work cycle.
+     */
+    CPU_LOAD_UP = 0,
+    /**
+     * This hint indicates a decrease in CPU workload intensity. It means that
+     * this hint session can reduce CPU resources and still meet the target duration.
+     */
+    CPU_LOAD_DOWN = 1,
+    /*
+     * This hint indicates an upcoming CPU workload that is completely changed and
+     * unknown. It means that the hint session should reset CPU resources to a known
+     * baseline to prepare for an arbitrary load, and must wake up if inactive.
+     */
+    CPU_LOAD_RESET = 2,
+    /*
+     * This hint indicates that the most recent CPU workload is resuming after a
+     * period of inactivity. It means that the hint session should allocate similar
+     * CPU resources to what was used previously, and must wake up if inactive.
+     */
+    CPU_LOAD_RESUME = 3,
+};
+
+/**
+ * Sends performance hints to inform the hint session of changes in the workload.
+ *
+ * @param session The performance hint session instance to update.
+ * @param hint The hint to send to the session.
+ * @return 0 on success
+ *         EPIPE if communication with the system service has failed.
+ */
+int APerformanceHint_sendHint(void* session, int hint);
+
+/**
+ * Return the list of thread ids, this API should only be used for testing only.
+ */
+int APerformanceHint_getThreadIds(void* aPerformanceHintSession,
+                                  int32_t* const threadIds, size_t* const size);
+
 __END_DECLS
 
 #endif // ANDROID_PRIVATE_NATIVE_PERFORMANCE_HINT_PRIVATE_H
diff --git a/libs/binder/BpBinder.cpp b/libs/binder/BpBinder.cpp
index 54d2445..1c470a1 100644
--- a/libs/binder/BpBinder.cpp
+++ b/libs/binder/BpBinder.cpp
@@ -47,6 +47,8 @@
 binder_proxy_limit_callback BpBinder::sLimitCallback;
 bool BpBinder::sBinderProxyThrottleCreate = false;
 
+static StaticString16 kDescriptorUninit(u"<uninit descriptor>");
+
 // Arbitrarily high value that probably distinguishes a bad behaving app
 uint32_t BpBinder::sBinderProxyCountHighWatermark = 2500;
 // Another arbitrary value a binder count needs to drop below before another callback will be called
@@ -211,6 +213,7 @@
         mAlive(true),
         mObitsSent(false),
         mObituaries(nullptr),
+        mDescriptorCache(kDescriptorUninit),
         mTrackedUid(-1) {
     extendObjectLifetime(OBJECT_LIFETIME_WEAK);
 }
@@ -258,12 +261,12 @@
 
 bool BpBinder::isDescriptorCached() const {
     Mutex::Autolock _l(mLock);
-    return mDescriptorCache.size() ? true : false;
+    return mDescriptorCache.string() != kDescriptorUninit.string();
 }
 
 const String16& BpBinder::getInterfaceDescriptor() const
 {
-    if (isDescriptorCached() == false) {
+    if (!isDescriptorCached()) {
         sp<BpBinder> thiz = sp<BpBinder>::fromExisting(const_cast<BpBinder*>(this));
 
         Parcel data;
@@ -276,8 +279,7 @@
             Mutex::Autolock _l(mLock);
             // mDescriptorCache could have been assigned while the lock was
             // released.
-            if (mDescriptorCache.size() == 0)
-                mDescriptorCache = res;
+            if (mDescriptorCache.string() == kDescriptorUninit.string()) mDescriptorCache = res;
         }
     }
 
@@ -369,10 +371,7 @@
         if (data.dataSize() > LOG_TRANSACTIONS_OVER_SIZE) {
             Mutex::Autolock _l(mLock);
             ALOGW("Large outgoing transaction of %zu bytes, interface descriptor %s, code %d",
-                  data.dataSize(),
-                  mDescriptorCache.size() ? String8(mDescriptorCache).c_str()
-                                          : "<uncached descriptor>",
-                  code);
+                  data.dataSize(), String8(mDescriptorCache).c_str(), code);
         }
 
         if (status == DEAD_OBJECT) mAlive = 0;
@@ -647,7 +646,7 @@
     if(obits != nullptr) {
         if (!obits->isEmpty()) {
             ALOGI("onLastStrongRef automatically unlinking death recipients: %s",
-                  mDescriptorCache.size() ? String8(mDescriptorCache).c_str() : "<uncached descriptor>");
+                  String8(mDescriptorCache).c_str());
         }
 
         if (ipc) ipc->clearDeathNotification(binderHandle(), this);
diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index 7770374..6d64e1e 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -132,12 +132,21 @@
     } else {
         out << "\ttarget.ptr=" << btd->target.ptr;
     }
-    out << "\t (cookie " << btd->cookie << ")"
-        << "\n"
+    out << "\t (cookie " << btd->cookie << ")\n"
         << "\tcode=" << TypeCode(btd->code) << ", flags=" << (void*)(uint64_t)btd->flags << "\n"
-        << "\tdata=" << btd->data.ptr.buffer << " (" << (void*)btd->data_size << " bytes)"
-        << "\n"
-        << "\toffsets=" << btd->data.ptr.offsets << " (" << (void*)btd->offsets_size << " bytes)";
+        << "\tdata=" << btd->data.ptr.buffer << " (" << (void*)btd->data_size << " bytes)\n"
+        << "\toffsets=" << btd->data.ptr.offsets << " (" << (void*)btd->offsets_size << " bytes)\n";
+    return btd + 1;
+}
+
+static const void* printBinderTransactionDataSecCtx(std::ostream& out, const void* data) {
+    const binder_transaction_data_secctx* btd = (const binder_transaction_data_secctx*)data;
+
+    printBinderTransactionData(out, &btd->transaction_data);
+
+    char* secctx = (char*)btd->secctx;
+    out << "\tsecctx=" << secctx << "\n";
+
     return btd+1;
 }
 
@@ -156,6 +165,11 @@
     out << "\t" << kReturnStrings[cmdIndex];
 
     switch (code) {
+        case BR_TRANSACTION_SEC_CTX: {
+            out << ": ";
+            cmd = (const int32_t*)printBinderTransactionDataSecCtx(out, cmd);
+        } break;
+
         case BR_TRANSACTION:
         case BR_REPLY: {
             out << ": ";
@@ -1017,6 +1031,10 @@
             if (!reply && !acquireResult) goto finish;
             break;
 
+        case BR_TRANSACTION_PENDING_FROZEN:
+            ALOGW("Sending oneway calls to frozen process.");
+            goto finish;
+
         case BR_DEAD_REPLY:
             err = DEAD_OBJECT;
             goto finish;
diff --git a/libs/binder/IServiceManager.cpp b/libs/binder/IServiceManager.cpp
index a0c4334..2408307 100644
--- a/libs/binder/IServiceManager.cpp
+++ b/libs/binder/IServiceManager.cpp
@@ -444,7 +444,7 @@
     bool declared;
     if (Status status = mTheRealServiceManager->isDeclared(String8(name).c_str(), &declared);
         !status.isOk()) {
-        ALOGW("Failed to get isDeclard for %s: %s", String8(name).c_str(),
+        ALOGW("Failed to get isDeclared for %s: %s", String8(name).c_str(),
               status.toString8().c_str());
         return false;
     }
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index ee081c4..44ff62b 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -1475,7 +1475,7 @@
 #ifdef BINDER_WITH_KERNEL_IPC
     flat_binder_object obj;
     obj.hdr.type = BINDER_TYPE_FD;
-    obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
+    obj.flags = 0;
     obj.binder = 0; /* Don't pass uninitialized stack data to a remote process */
     obj.handle = fd;
     obj.cookie = takeOwnership ? 1 : 0;
diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index 1f311ac..254dda8 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -439,6 +439,10 @@
     return mCurrentThreads;
 }
 
+bool ProcessState::isThreadPoolStarted() const {
+    return mThreadPoolStarted;
+}
+
 #define DRIVER_FEATURES_PATH "/dev/binderfs/features/"
 bool ProcessState::isDriverFeatureEnabled(const DriverFeature feature) {
     static const char* const names[] = {
diff --git a/libs/binder/RpcServer.cpp b/libs/binder/RpcServer.cpp
index 0820cd1..0d06e9e 100644
--- a/libs/binder/RpcServer.cpp
+++ b/libs/binder/RpcServer.cpp
@@ -50,7 +50,8 @@
 
 RpcServer::RpcServer(std::unique_ptr<RpcTransportCtx> ctx) : mCtx(std::move(ctx)) {}
 RpcServer::~RpcServer() {
-    (void)shutdown();
+    RpcMutexUniqueLock _l(mLock);
+    LOG_ALWAYS_FATAL_IF(mShutdownTrigger != nullptr, "Must call shutdown() before destructor");
 }
 
 sp<RpcServer> RpcServer::make(std::unique_ptr<RpcTransportCtxFactory> rpcTransportCtxFactory) {
@@ -70,11 +71,8 @@
     return setupSocketServer(UnixSocketAddress(path));
 }
 
-status_t RpcServer::setupVsockServer(unsigned int port) {
-    // realizing value w/ this type at compile time to avoid ubsan abort
-    constexpr unsigned int kAnyCid = VMADDR_CID_ANY;
-
-    return setupSocketServer(VsockSocketAddress(kAnyCid, port));
+status_t RpcServer::setupVsockServer(unsigned int bindCid, unsigned int port) {
+    return setupSocketServer(VsockSocketAddress(bindCid, port));
 }
 
 status_t RpcServer::setupInetServer(const char* address, unsigned int port,
@@ -157,6 +155,12 @@
     mRootObjectFactory = std::move(makeObject);
 }
 
+void RpcServer::setConnectionFilter(std::function<bool(const void*, size_t)>&& filter) {
+    RpcMutexLockGuard _l(mLock);
+    LOG_ALWAYS_FATAL_IF(mShutdownTrigger != nullptr, "Already joined");
+    mConnectionFilter = std::move(filter);
+}
+
 sp<IBinder> RpcServer::getRootObject() {
     RpcMutexLockGuard _l(mLock);
     bool hasWeak = mRootObjectWeak.unsafe_get();
@@ -200,11 +204,15 @@
     iovec iov{&zero, sizeof(zero)};
     std::vector<std::variant<base::unique_fd, base::borrowed_fd>> fds;
 
-    if (receiveMessageFromSocket(server.mServer, &iov, 1, &fds) < 0) {
+    ssize_t num_bytes = receiveMessageFromSocket(server.mServer, &iov, 1, &fds);
+    if (num_bytes < 0) {
         int savedErrno = errno;
         ALOGE("Failed recvmsg: %s", strerror(savedErrno));
         return -savedErrno;
     }
+    if (num_bytes == 0) {
+        return DEAD_OBJECT;
+    }
     if (fds.size() != 1) {
         ALOGE("Expected exactly one fd from recvmsg, got %zu", fds.size());
         return -EINVAL;
@@ -239,16 +247,25 @@
         socklen_t addrLen = addr.size();
 
         RpcTransportFd clientSocket;
-        if (mAcceptFn(*this, &clientSocket) != OK) {
-            continue;
+        if ((status = mAcceptFn(*this, &clientSocket)) != OK) {
+            if (status == DEAD_OBJECT)
+                break;
+            else
+                continue;
         }
+
+        LOG_RPC_DETAIL("accept on fd %d yields fd %d", mServer.fd.get(), clientSocket.fd.get());
+
         if (getpeername(clientSocket.fd.get(), reinterpret_cast<sockaddr*>(addr.data()),
                         &addrLen)) {
             ALOGE("Could not getpeername socket: %s", strerror(errno));
             continue;
         }
 
-        LOG_RPC_DETAIL("accept on fd %d yields fd %d", mServer.fd.get(), clientSocket.fd.get());
+        if (mConnectionFilter != nullptr && !mConnectionFilter(addr.data(), addrLen)) {
+            ALOGE("Dropped client connection fd %d", clientSocket.fd.get());
+            continue;
+        }
 
         {
             RpcMutexLockGuard _l(mLock);
diff --git a/libs/binder/RpcTransportTipcAndroid.cpp b/libs/binder/RpcTransportTipcAndroid.cpp
index 453279c..8b3ddfb 100644
--- a/libs/binder/RpcTransportTipcAndroid.cpp
+++ b/libs/binder/RpcTransportTipcAndroid.cpp
@@ -63,12 +63,14 @@
         if (pfd.revents & POLLERR) {
             return DEAD_OBJECT;
         }
+        if (pfd.revents & POLLIN) {
+            // Copied from FdTrigger.cpp: Even though POLLHUP may also be set,
+            // treat it as a success condition to ensure data is drained.
+            return OK;
+        }
         if (pfd.revents & POLLHUP) {
             return DEAD_OBJECT;
         }
-        if (pfd.revents & POLLIN) {
-            return OK;
-        }
 
         return WOULD_BLOCK;
     }
diff --git a/libs/binder/binder_module.h b/libs/binder/binder_module.h
index 793795e..eef07ae 100644
--- a/libs/binder/binder_module.h
+++ b/libs/binder/binder_module.h
@@ -100,4 +100,9 @@
 #define BINDER_ENABLE_ONEWAY_SPAM_DETECTION _IOW('b', 16, __u32)
 #endif // BINDER_ENABLE_ONEWAY_SPAM_DETECTION
 
+#ifndef BR_TRANSACTION_PENDING_FROZEN
+// Temporary definition of BR_TRANSACTION_PENDING_FROZEN until UAPI binder.h includes it.
+#define BR_TRANSACTION_PENDING_FROZEN _IO('r', 20)
+#endif // BR_TRANSACTION_PENDING_FROZEN
+
 #endif // _BINDER_MODULE_H_
diff --git a/libs/binder/include/binder/IInterface.h b/libs/binder/include/binder/IInterface.h
index dc572ac..8cc8105 100644
--- a/libs/binder/include/binder/IInterface.h
+++ b/libs/binder/include/binder/IInterface.h
@@ -230,7 +230,6 @@
         "android.graphicsenv.IGpuService",
         "android.gui.IConsumerListener",
         "android.gui.IGraphicBufferConsumer",
-        "android.gui.ITransactionComposerListener",
         "android.gui.SensorEventConnection",
         "android.gui.SensorServer",
         "android.hardware.ICamera",
diff --git a/libs/binder/include/binder/IPCThreadState.h b/libs/binder/include/binder/IPCThreadState.h
index 65b77c6..d261c21 100644
--- a/libs/binder/include/binder/IPCThreadState.h
+++ b/libs/binder/include/binder/IPCThreadState.h
@@ -141,11 +141,13 @@
             void                restoreCallingIdentity(int64_t token);
             bool hasExplicitIdentity();
 
+            // For main functions - dangerous for libraries to use
             status_t            setupPolling(int* fd);
             status_t            handlePolledCommands();
             void                flushCommands();
             bool                flushIfNeeded();
 
+            // For main functions - dangerous for libraries to use
             void                joinThreadPool(bool isMain = true);
             
             // Stop the local process.
diff --git a/libs/binder/include/binder/IServiceManager.h b/libs/binder/include/binder/IServiceManager.h
index 79e771f..2af512e 100644
--- a/libs/binder/include/binder/IServiceManager.h
+++ b/libs/binder/include/binder/IServiceManager.h
@@ -67,7 +67,8 @@
      * a system property, or in the case of services in the VINTF manifest, it can be checked
      * with isDeclared).
      */
-    virtual sp<IBinder>         getService( const String16& name) const = 0;
+    [[deprecated("this polls for 5s, prefer waitForService or checkService")]]
+    virtual sp<IBinder> getService(const String16& name) const = 0;
 
     /**
      * Retrieve an existing service, non-blocking.
diff --git a/libs/binder/include/binder/ProcessState.h b/libs/binder/include/binder/ProcessState.h
index 9679a5f..bad8cb1 100644
--- a/libs/binder/include/binder/ProcessState.h
+++ b/libs/binder/include/binder/ProcessState.h
@@ -50,6 +50,7 @@
 
     sp<IBinder> getContextObject(const sp<IBinder>& caller);
 
+    // For main functions - dangerous for libraries to use
     void startThreadPool();
 
     bool becomeContextManager();
@@ -57,8 +58,10 @@
     sp<IBinder> getStrongProxyForHandle(int32_t handle);
     void expungeHandle(int32_t handle, IBinder* binder);
 
+    // TODO: deprecate.
     void spawnPooledThread(bool isMain);
 
+    // For main functions - dangerous for libraries to use
     status_t setThreadPoolMaxThreadCount(size_t maxThreads);
     status_t enableOnewaySpamDetection(bool enable);
     void giveThreadPoolName();
@@ -94,6 +97,11 @@
      */
     size_t getThreadPoolMaxTotalThreadCount() const;
 
+    /**
+     * Check to see if the thread pool has started.
+     */
+    bool isThreadPoolStarted() const;
+
     enum class DriverFeature {
         ONEWAY_SPAM_DETECTION,
         EXTENDED_ERROR,
diff --git a/libs/binder/include/binder/RpcServer.h b/libs/binder/include/binder/RpcServer.h
index 4ad0a47..25193a3 100644
--- a/libs/binder/include/binder/RpcServer.h
+++ b/libs/binder/include/binder/RpcServer.h
@@ -81,9 +81,9 @@
     [[nodiscard]] status_t setupRawSocketServer(base::unique_fd socket_fd);
 
     /**
-     * Creates an RPC server at the current port.
+     * Creates an RPC server binding to the given CID at the given port.
      */
-    [[nodiscard]] status_t setupVsockServer(unsigned int port);
+    [[nodiscard]] status_t setupVsockServer(unsigned int bindCid, unsigned int port);
 
     /**
      * Creates an RPC server at the current port using IPv4.
@@ -171,6 +171,16 @@
     sp<IBinder> getRootObject();
 
     /**
+     * Set optional filter of incoming connections based on the peer's address.
+     *
+     * Takes one argument: a callable that is invoked on each accept()-ed
+     * connection and returns false if the connection should be dropped.
+     * See the description of setPerSessionRootObject() for details about
+     * the callable's arguments.
+     */
+    void setConnectionFilter(std::function<bool(const void*, size_t)>&& filter);
+
+    /**
      * See RpcTransportCtx::getCertificate
      */
     std::vector<uint8_t> getCertificate(RpcCertificateFormat);
@@ -253,6 +263,7 @@
     sp<IBinder> mRootObject;
     wp<IBinder> mRootObjectWeak;
     std::function<sp<IBinder>(const void*, size_t)> mRootObjectFactory;
+    std::function<bool(const void*, size_t)> mConnectionFilter;
     std::map<std::vector<uint8_t>, sp<RpcSession>> mSessions;
     std::unique_ptr<FdTrigger> mShutdownTrigger;
     RpcConditionVariable mShutdownCv;
diff --git a/libs/binder/include_rpc_unstable/binder_rpc_unstable.hpp b/libs/binder/include_rpc_unstable/binder_rpc_unstable.hpp
index f08bde8..3ebbed6 100644
--- a/libs/binder/include_rpc_unstable/binder_rpc_unstable.hpp
+++ b/libs/binder/include_rpc_unstable/binder_rpc_unstable.hpp
@@ -23,11 +23,22 @@
 
 struct AIBinder;
 struct ARpcServer;
+struct ARpcSession;
+
+enum class ARpcSession_FileDescriptorTransportMode {
+    None,
+    Unix,
+    Trusty,
+};
 
 // Starts an RPC server on a given port and a given root IBinder object.
+// The server will only accept connections from the given CID.
+// Set `cid` to VMADDR_CID_ANY to accept connections from any client.
+// Set `cid` to VMADDR_CID_LOCAL to only bind to the local vsock interface.
 // Returns an opaque handle to the running server instance, or null if the server
 // could not be started.
-[[nodiscard]] ARpcServer* ARpcServer_newVsock(AIBinder* service, unsigned int port);
+[[nodiscard]] ARpcServer* ARpcServer_newVsock(AIBinder* service, unsigned int cid,
+                                              unsigned int port);
 
 // Starts a Unix domain RPC server with a given init-managed Unix domain `name`
 // and a given root IBinder object.
@@ -36,6 +47,22 @@
 // could not be started.
 [[nodiscard]] ARpcServer* ARpcServer_newInitUnixDomain(AIBinder* service, const char* name);
 
+// Starts an RPC server that bootstraps sessions using an existing Unix domain
+// socket pair, with a given root IBinder object.
+// Callers should create a pair of SOCK_STREAM Unix domain sockets, pass one to
+// this function and the other to UnixDomainBootstrapClient(). Multiple client
+// session can be created from the client end of the pair.
+// Does not take ownership of `service`.
+// Returns an opaque handle to the running server instance, or null if the server
+// could not be started.
+[[nodiscard]] ARpcServer* ARpcServer_newUnixDomainBootstrap(AIBinder* service, int bootstrapFd);
+
+// Sets the list of supported file descriptor transport modes of this RPC server.
+void ARpcServer_setSupportedFileDescriptorTransportModes(
+        ARpcServer* handle,
+        const ARpcSession_FileDescriptorTransportMode modes[],
+        size_t modes_len);
+
 // Runs ARpcServer_join() in a background thread. Immediately returns.
 void ARpcServer_start(ARpcServer* server);
 
@@ -46,34 +73,52 @@
 void ARpcServer_join(ARpcServer* server);
 
 // Shuts down any running ARpcServer_join().
-void ARpcServer_shutdown(ARpcServer* server);
+[[nodiscard]] bool ARpcServer_shutdown(ARpcServer* server);
 
 // Frees the ARpcServer handle and drops the reference count on the underlying
 // RpcServer instance. The handle must not be reused afterwards.
 // This automatically calls ARpcServer_shutdown().
 void ARpcServer_free(ARpcServer* server);
 
-// Starts an RPC server on a given port and a given root IBinder factory.
-// RunVsockRpcServerWithFactory acts like RunVsockRpcServerCallback, but instead of
-// assigning single root IBinder object to all connections, factory is called
-// whenever a client connects, making it possible to assign unique IBinder
-// object to each client.
-bool RunVsockRpcServerWithFactory(AIBinder* (*factory)(unsigned int cid, void* context),
-                                  void* factoryContext, unsigned int port);
+// Allocates a new RpcSession object and returns an opaque handle to it.
+[[nodiscard]] ARpcSession* ARpcSession_new();
 
-AIBinder* VsockRpcClient(unsigned int cid, unsigned int port);
+// Connects to an RPC server over vsock at a given CID on a given port.
+// Returns the root Binder object of the server.
+AIBinder* ARpcSession_setupVsockClient(ARpcSession* session, unsigned int cid,
+                                       unsigned int port);
 
-// Gets the service via the RPC binder with Unix domain socket with the given
-// Unix socket `name`.
-// The final Unix domain socket path name is /dev/socket/`name`.
-AIBinder* UnixDomainRpcClient(const char* name);
+// Connects to an RPC server over a Unix Domain Socket of the given name.
+// The final Unix Domain Socket path name is /dev/socket/`name`.
+// Returns the root Binder object of the server.
+AIBinder* ARpcSession_setupUnixDomainClient(ARpcSession* session, const char* name);
 
-// Connect to an RPC server with preconnected file descriptors.
+// Connects to an RPC server over the given bootstrap Unix domain socket.
+// Does NOT take ownership of `bootstrapFd`.
+AIBinder* ARpcSession_setupUnixDomainBootstrapClient(ARpcSession* session,
+                                                     int bootstrapFd);
+
+// Connects to an RPC server with preconnected file descriptors.
 //
 // requestFd should connect to the server and return a valid file descriptor, or
 // -1 if connection fails.
 //
 // param will be passed to requestFd. Callers can use param to pass contexts to
 // the requestFd function.
-AIBinder* RpcPreconnectedClient(int (*requestFd)(void* param), void* param);
+AIBinder* ARpcSession_setupPreconnectedClient(ARpcSession* session,
+                                              int (*requestFd)(void* param),
+                                              void* param);
+
+// Sets the file descriptor transport mode for this session.
+void ARpcSession_setFileDescriptorTransportMode(ARpcSession* session,
+                                                ARpcSession_FileDescriptorTransportMode mode);
+
+// Sets the maximum number of incoming threads.
+void ARpcSession_setMaxIncomingThreads(ARpcSession* session, size_t threads);
+
+// Sets the maximum number of outgoing threads.
+void ARpcSession_setMaxOutgoingThreads(ARpcSession* session, size_t threads);
+
+// Decrements the refcount of the underlying RpcSession object.
+void ARpcSession_free(ARpcSession* session);
 }
diff --git a/libs/binder/libbinder_rpc_unstable.cpp b/libs/binder/libbinder_rpc_unstable.cpp
index f55c779..78dae4b 100644
--- a/libs/binder/libbinder_rpc_unstable.cpp
+++ b/libs/binder/libbinder_rpc_unstable.cpp
@@ -35,55 +35,74 @@
 // Opaque handle for RpcServer.
 struct ARpcServer {};
 
-static sp<RpcServer> toRpcServer(ARpcServer* handle) {
-    auto ref = reinterpret_cast<RpcServer*>(handle);
-    return sp<RpcServer>::fromExisting(ref);
-}
+// Opaque handle for RpcSession.
+struct ARpcSession {};
 
-static ARpcServer* createRpcServerHandle(sp<RpcServer>& server) {
+template <typename A, typename T>
+static A* createObjectHandle(sp<T>& server) {
     auto ref = server.get();
     ref->incStrong(ref);
-    return reinterpret_cast<ARpcServer*>(ref);
+    return reinterpret_cast<A*>(ref);
 }
 
-static void freeRpcServerHandle(ARpcServer* handle) {
-    auto ref = reinterpret_cast<RpcServer*>(handle);
+template <typename T, typename A>
+static void freeObjectHandle(A* handle) {
+    LOG_ALWAYS_FATAL_IF(handle == nullptr, "Handle cannot be null");
+    auto ref = reinterpret_cast<T*>(handle);
     ref->decStrong(ref);
 }
 
+template <typename T, typename A>
+static sp<T> handleToStrongPointer(A* handle) {
+    LOG_ALWAYS_FATAL_IF(handle == nullptr, "Handle cannot be null");
+    auto ref = reinterpret_cast<T*>(handle);
+    return sp<T>::fromExisting(ref);
+}
+
+RpcSession::FileDescriptorTransportMode toTransportMode(
+        ARpcSession_FileDescriptorTransportMode mode) {
+    switch (mode) {
+        case ARpcSession_FileDescriptorTransportMode::None:
+            return RpcSession::FileDescriptorTransportMode::NONE;
+        case ARpcSession_FileDescriptorTransportMode::Unix:
+            return RpcSession::FileDescriptorTransportMode::UNIX;
+        case ARpcSession_FileDescriptorTransportMode::Trusty:
+            return RpcSession::FileDescriptorTransportMode::TRUSTY;
+        default:
+            return RpcSession::FileDescriptorTransportMode::NONE;
+    }
+}
+
 extern "C" {
 
-bool RunVsockRpcServerWithFactory(AIBinder* (*factory)(unsigned int cid, void* context),
-                                  void* factoryContext, unsigned int port) {
+ARpcServer* ARpcServer_newVsock(AIBinder* service, unsigned int cid, unsigned int port) {
     auto server = RpcServer::make();
-    if (status_t status = server->setupVsockServer(port); status != OK) {
-        LOG(ERROR) << "Failed to set up vsock server with port " << port
-                   << " error: " << statusToString(status).c_str();
-        return false;
+
+    unsigned int bindCid = VMADDR_CID_ANY; // bind to the remote interface
+    if (cid == VMADDR_CID_LOCAL) {
+        bindCid = VMADDR_CID_LOCAL; // bind to the local interface
+        cid = VMADDR_CID_ANY;       // no need for a connection filter
     }
-    server->setPerSessionRootObject([=](const void* addr, size_t addrlen) {
-        LOG_ALWAYS_FATAL_IF(addrlen < sizeof(sockaddr_vm), "sockaddr is truncated");
-        const sockaddr_vm* vaddr = reinterpret_cast<const sockaddr_vm*>(addr);
-        LOG_ALWAYS_FATAL_IF(vaddr->svm_family != AF_VSOCK, "address is not a vsock");
-        return AIBinder_toPlatformBinder(factory(vaddr->svm_cid, factoryContext));
-    });
 
-    server->join();
-
-    // Shutdown any open sessions since server failed.
-    (void)server->shutdown();
-    return true;
-}
-
-ARpcServer* ARpcServer_newVsock(AIBinder* service, unsigned int port) {
-    auto server = RpcServer::make();
-    if (status_t status = server->setupVsockServer(port); status != OK) {
+    if (status_t status = server->setupVsockServer(bindCid, port); status != OK) {
         LOG(ERROR) << "Failed to set up vsock server with port " << port
                    << " error: " << statusToString(status).c_str();
         return nullptr;
     }
+    if (cid != VMADDR_CID_ANY) {
+        server->setConnectionFilter([=](const void* addr, size_t addrlen) {
+            LOG_ALWAYS_FATAL_IF(addrlen < sizeof(sockaddr_vm), "sockaddr is truncated");
+            const sockaddr_vm* vaddr = reinterpret_cast<const sockaddr_vm*>(addr);
+            LOG_ALWAYS_FATAL_IF(vaddr->svm_family != AF_VSOCK, "address is not a vsock");
+            if (cid != vaddr->svm_cid) {
+                LOG(ERROR) << "Rejected vsock connection from CID " << vaddr->svm_cid;
+                return false;
+            }
+            return true;
+        });
+    }
     server->setRootObject(AIBinder_toPlatformBinder(service));
-    return createRpcServerHandle(server);
+    return createObjectHandle<ARpcServer>(server);
 }
 
 ARpcServer* ARpcServer_newInitUnixDomain(AIBinder* service, const char* name) {
@@ -99,27 +118,67 @@
         return nullptr;
     }
     server->setRootObject(AIBinder_toPlatformBinder(service));
-    return createRpcServerHandle(server);
+    return createObjectHandle<ARpcServer>(server);
+}
+
+ARpcServer* ARpcServer_newUnixDomainBootstrap(AIBinder* service, int bootstrapFd) {
+    auto server = RpcServer::make();
+    auto fd = unique_fd(bootstrapFd);
+    if (!fd.ok()) {
+        LOG(ERROR) << "Invalid bootstrap fd " << bootstrapFd;
+        return nullptr;
+    }
+    if (status_t status = server->setupUnixDomainSocketBootstrapServer(std::move(fd));
+        status != OK) {
+        LOG(ERROR) << "Failed to set up Unix Domain RPC server with bootstrap fd " << bootstrapFd
+                   << " error: " << statusToString(status).c_str();
+        return nullptr;
+    }
+    server->setRootObject(AIBinder_toPlatformBinder(service));
+    return createObjectHandle<ARpcServer>(server);
+}
+
+void ARpcServer_setSupportedFileDescriptorTransportModes(
+        ARpcServer* handle, const ARpcSession_FileDescriptorTransportMode modes[],
+        size_t modes_len) {
+    auto server = handleToStrongPointer<RpcServer>(handle);
+    std::vector<RpcSession::FileDescriptorTransportMode> modevec;
+    for (size_t i = 0; i < modes_len; i++) {
+        modevec.push_back(toTransportMode(modes[i]));
+    }
+    server->setSupportedFileDescriptorTransportModes(modevec);
 }
 
 void ARpcServer_start(ARpcServer* handle) {
-    toRpcServer(handle)->start();
+    handleToStrongPointer<RpcServer>(handle)->start();
 }
 
 void ARpcServer_join(ARpcServer* handle) {
-    toRpcServer(handle)->join();
+    handleToStrongPointer<RpcServer>(handle)->join();
 }
 
-void ARpcServer_shutdown(ARpcServer* handle) {
-    toRpcServer(handle)->shutdown();
+bool ARpcServer_shutdown(ARpcServer* handle) {
+    return handleToStrongPointer<RpcServer>(handle)->shutdown();
 }
 
 void ARpcServer_free(ARpcServer* handle) {
-    freeRpcServerHandle(handle);
+    // Ignore the result of ARpcServer_shutdown - either it had been called
+    // earlier, or the RpcServer destructor will panic.
+    (void)ARpcServer_shutdown(handle);
+    freeObjectHandle<RpcServer>(handle);
 }
 
-AIBinder* VsockRpcClient(unsigned int cid, unsigned int port) {
+ARpcSession* ARpcSession_new() {
     auto session = RpcSession::make();
+    return createObjectHandle<ARpcSession>(session);
+}
+
+void ARpcSession_free(ARpcSession* handle) {
+    freeObjectHandle<RpcSession>(handle);
+}
+
+AIBinder* ARpcSession_setupVsockClient(ARpcSession* handle, unsigned int cid, unsigned int port) {
+    auto session = handleToStrongPointer<RpcSession>(handle);
     if (status_t status = session->setupVsockClient(cid, port); status != OK) {
         LOG(ERROR) << "Failed to set up vsock client with CID " << cid << " and port " << port
                    << " error: " << statusToString(status).c_str();
@@ -128,10 +187,10 @@
     return AIBinder_fromPlatformBinder(session->getRootObject());
 }
 
-AIBinder* UnixDomainRpcClient(const char* name) {
+AIBinder* ARpcSession_setupUnixDomainClient(ARpcSession* handle, const char* name) {
     std::string pathname(name);
     pathname = ANDROID_SOCKET_DIR "/" + pathname;
-    auto session = RpcSession::make();
+    auto session = handleToStrongPointer<RpcSession>(handle);
     if (status_t status = session->setupUnixDomainClient(pathname.c_str()); status != OK) {
         LOG(ERROR) << "Failed to set up Unix Domain RPC client with path: " << pathname
                    << " error: " << statusToString(status).c_str();
@@ -140,8 +199,25 @@
     return AIBinder_fromPlatformBinder(session->getRootObject());
 }
 
-AIBinder* RpcPreconnectedClient(int (*requestFd)(void* param), void* param) {
-    auto session = RpcSession::make();
+AIBinder* ARpcSession_setupUnixDomainBootstrapClient(ARpcSession* handle, int bootstrapFd) {
+    auto session = handleToStrongPointer<RpcSession>(handle);
+    auto fd = unique_fd(dup(bootstrapFd));
+    if (!fd.ok()) {
+        LOG(ERROR) << "Invalid bootstrap fd " << bootstrapFd;
+        return nullptr;
+    }
+    if (status_t status = session->setupUnixDomainSocketBootstrapClient(std::move(fd));
+        status != OK) {
+        LOG(ERROR) << "Failed to set up Unix Domain RPC client with bootstrap fd: " << bootstrapFd
+                   << " error: " << statusToString(status).c_str();
+        return nullptr;
+    }
+    return AIBinder_fromPlatformBinder(session->getRootObject());
+}
+
+AIBinder* ARpcSession_setupPreconnectedClient(ARpcSession* handle, int (*requestFd)(void* param),
+                                              void* param) {
+    auto session = handleToStrongPointer<RpcSession>(handle);
     auto request = [=] { return unique_fd{requestFd(param)}; };
     if (status_t status = session->setupPreconnectedClient(unique_fd{}, request); status != OK) {
         LOG(ERROR) << "Failed to set up vsock client. error: " << statusToString(status).c_str();
@@ -149,4 +225,20 @@
     }
     return AIBinder_fromPlatformBinder(session->getRootObject());
 }
+
+void ARpcSession_setFileDescriptorTransportMode(ARpcSession* handle,
+                                                ARpcSession_FileDescriptorTransportMode mode) {
+    auto session = handleToStrongPointer<RpcSession>(handle);
+    session->setFileDescriptorTransportMode(toTransportMode(mode));
+}
+
+void ARpcSession_setMaxIncomingThreads(ARpcSession* handle, size_t threads) {
+    auto session = handleToStrongPointer<RpcSession>(handle);
+    session->setMaxIncomingThreads(threads);
+}
+
+void ARpcSession_setMaxOutgoingThreads(ARpcSession* handle, size_t threads) {
+    auto session = handleToStrongPointer<RpcSession>(handle);
+    session->setMaxOutgoingThreads(threads);
+}
 }
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index 8ae7537..58ed418 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -66,10 +66,14 @@
         "service_manager.cpp",
     ],
 
-    shared_libs: [
+    static_libs: [
         "libandroid_runtime_lazy",
         "libbase",
+    ],
+
+    shared_libs: [
         "libbinder",
+        "liblog",
         "libutils",
     ],
 
diff --git a/libs/binder/ndk/ibinder.cpp b/libs/binder/ndk/ibinder.cpp
index 28d1f16..d0de7b9 100644
--- a/libs/binder/ndk/ibinder.cpp
+++ b/libs/binder/ndk/ibinder.cpp
@@ -75,12 +75,48 @@
 AIBinder::AIBinder(const AIBinder_Class* clazz) : mClazz(clazz) {}
 AIBinder::~AIBinder() {}
 
-std::optional<bool> AIBinder::associateClassInternal(const AIBinder_Class* clazz,
-                                                     const String16& newDescriptor, bool set) {
+// b/175635923 libcxx causes "implicit-conversion" with a string with invalid char
+static std::string SanitizeString(const String16& str) {
+    std::string sanitized{String8(str)};
+    for (auto& c : sanitized) {
+        if (!isprint(c)) {
+            c = '?';
+        }
+    }
+    return sanitized;
+}
+
+bool AIBinder::associateClass(const AIBinder_Class* clazz) {
+    if (clazz == nullptr) return false;
+
+    // If mClazz is non-null, this must have been called and cached
+    // already. So, we can safely call this first. Due to the implementation
+    // of getInterfaceDescriptor (at time of writing), two simultaneous calls
+    // may lead to extra binder transactions, but this is expected to be
+    // exceedingly rare. Once we have a binder, when we get it again later,
+    // we won't make another binder transaction here.
+    const String16& descriptor = getBinder()->getInterfaceDescriptor();
+    const String16& newDescriptor = clazz->getInterfaceDescriptor();
+
     std::lock_guard<std::mutex> lock(mClazzMutex);
     if (mClazz == clazz) return true;
 
-    if (mClazz != nullptr) {
+    // If this is an ABpBinder, the first class object becomes the canonical one. The implication
+    // of this is that no API can require a proxy information to get information on how to behave.
+    // from the class itself - which should only store the interface descriptor. The functionality
+    // should be implemented by adding AIBinder_* APIs to set values on binders themselves, by
+    // setting things on AIBinder_Class which get transferred along with the binder, so that they
+    // can be read along with the BpBinder, or by modifying APIs directly (e.g. an option in
+    // onTransact).
+    //
+    // While this check is required to support linkernamespaces, one downside of it is that
+    // you may parcel code to communicate between things in the same process. However, comms
+    // between linkernamespaces like this already happen for cross-language calls like Java<->C++
+    // or Rust<->Java, and there are good stability guarantees here. This interacts with
+    // binder Stability checks exactly like any other in-process call. The stability is known
+    // to the IBinder object, so that it doesn't matter if a class object comes from
+    // a different stability level.
+    if (mClazz != nullptr && !asABpBinder()) {
         const String16& currentDescriptor = mClazz->getInterfaceDescriptor();
         if (newDescriptor == currentDescriptor) {
             LOG(ERROR) << __func__ << ": Class descriptors '" << currentDescriptor
@@ -97,37 +133,10 @@
         return false;
     }
 
-    if (set) {
-        // if this is a local object, it's not one known to libbinder_ndk
-        mClazz = clazz;
-        return true;
-    }
-
-    return {};
-}
-
-// b/175635923 libcxx causes "implicit-conversion" with a string with invalid char
-static std::string SanitizeString(const String16& str) {
-    std::string sanitized{String8(str)};
-    for (auto& c : sanitized) {
-        if (!isprint(c)) {
-            c = '?';
-        }
-    }
-    return sanitized;
-}
-
-bool AIBinder::associateClass(const AIBinder_Class* clazz) {
-    if (clazz == nullptr) return false;
-
-    const String16& newDescriptor = clazz->getInterfaceDescriptor();
-
-    auto result = associateClassInternal(clazz, newDescriptor, false);
-    if (result.has_value()) return *result;
-
-    CHECK(asABpBinder() != nullptr);  // ABBinder always has a descriptor
-
-    const String16& descriptor = getBinder()->getInterfaceDescriptor();
+    // This will always be an O(n) comparison, but it's expected to be extremely rare.
+    // since it's an error condition. Do the comparison after we take the lock and
+    // check the pointer equality fast path. By always taking the lock, it's also
+    // more flake-proof. However, the check is not dependent on the lock.
     if (descriptor != newDescriptor) {
         if (getBinder()->isBinderAlive()) {
             LOG(ERROR) << __func__ << ": Expecting binder to have class '" << newDescriptor
@@ -141,7 +150,14 @@
         return false;
     }
 
-    return associateClassInternal(clazz, newDescriptor, true).value();
+    // A local binder being set for the first time OR
+    // ignoring a proxy binder which is set multiple time, by considering the first
+    // associated class as the canonical one.
+    if (mClazz == nullptr) {
+        mClazz = clazz;
+    }
+
+    return true;
 }
 
 ABBinder::ABBinder(const AIBinder_Class* clazz, void* userData)
@@ -325,6 +341,10 @@
     return lhs->binder < rhs->binder;
 }
 
+// WARNING: When multiple classes exist with the same interface descriptor in different
+// linkernamespaces, the first one to be associated with mClazz becomes the canonical one
+// and the only requirement on this is that the interface descriptors match. If this
+// is an ABpBinder, no other state can be referenced from mClazz.
 AIBinder_Class::AIBinder_Class(const char* interfaceDescriptor, AIBinder_Class_onCreate onCreate,
                                AIBinder_Class_onDestroy onDestroy,
                                AIBinder_Class_onTransact onTransact)
@@ -632,6 +652,10 @@
     (*in)->get()->markForBinder(binder->getBinder());
 
     status_t status = android::OK;
+
+    // note - this is the only read of a value in clazz, and it comes with a warning
+    // on the API itself. Do not copy this design. Instead, attach data in a new
+    // version of the prepareTransaction function.
     if (clazz->writeHeader) {
         status = (*in)->get()->writeInterfaceToken(clazz->getInterfaceDescriptor());
     }
diff --git a/libs/binder/ndk/ibinder_internal.h b/libs/binder/ndk/ibinder_internal.h
index d7098e8..67bb092 100644
--- a/libs/binder/ndk/ibinder_internal.h
+++ b/libs/binder/ndk/ibinder_internal.h
@@ -53,12 +53,14 @@
     }
 
    private:
-    std::optional<bool> associateClassInternal(const AIBinder_Class* clazz,
-                                               const ::android::String16& newDescriptor, bool set);
-
     // AIBinder instance is instance of this class for a local object. In order to transact on a
     // remote object, this also must be set for simplicity (although right now, only the
     // interfaceDescriptor from it is used).
+    //
+    // WARNING: When multiple classes exist with the same interface descriptor in different
+    // linkernamespaces, the first one to be associated with mClazz becomes the canonical one
+    // and the only requirement on this is that the interface descriptors match. If this
+    // is an ABpBinder, no other state can be referenced from mClazz.
     const AIBinder_Class* mClazz;
     std::mutex mClazzMutex;
 };
diff --git a/libs/binder/ndk/include_ndk/android/binder_ibinder.h b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
index 4163897..db2d2c1 100644
--- a/libs/binder/ndk/include_ndk/android/binder_ibinder.h
+++ b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
@@ -229,6 +229,11 @@
  *
  * Available since API level 33.
  *
+ * WARNING: this API interacts badly with linkernamespaces. For correct behavior, you must
+ * use it on all instances of a class in the same process which share the same interface
+ * descriptor. In general, it is recommended you do not use this API, because it is disabling
+ * type safety.
+ *
  * \param clazz class to disable interface header on.
  */
 void AIBinder_Class_disableInterfaceTokenHeader(AIBinder_Class* clazz) __INTRODUCED_IN(33);
@@ -589,6 +594,9 @@
  *
  * See also AIBinder_linkToDeath/AIBinder_unlinkToDeath.
  *
+ * WARNING: Make sure the lifetime of this cookie is long enough. If it is dynamically
+ * allocated, it should be deleted with AIBinder_DeathRecipient_setOnUnlinked.
+ *
  * Available since API level 33.
  *
  * \param cookie the cookie passed to AIBinder_linkToDeath.
@@ -600,6 +608,9 @@
  *
  * Available since API level 29.
  *
+ * WARNING: Make sure the lifetime of this cookie is long enough. If it is dynamically
+ * allocated, it should be deleted with AIBinder_DeathRecipient_setOnUnlinked.
+ *
  * \param onBinderDied the callback to call when this death recipient is invoked.
  *
  * \return the newly constructed object (or null if onBinderDied is null).
@@ -613,7 +624,8 @@
  *
  *  1. If the binder died, shortly after the call to onBinderDied.
  *  2. If the binder is explicitly unlinked with AIBinder_unlinkToDeath or
- *     AIBinder_DeathRecipient_delete.
+ *     AIBinder_DeathRecipient_delete, after any pending onBinderDied calls
+ *     finish.
  *  3. During or shortly after the AIBinder_linkToDeath call if it returns an error.
  *
  * It is guaranteed that the callback is called exactly once for each call to linkToDeath unless the
diff --git a/libs/binder/ndk/include_platform/android/binder_process.h b/libs/binder/ndk/include_platform/android/binder_process.h
index f408fad..ffcad55 100644
--- a/libs/binder/ndk/include_platform/android/binder_process.h
+++ b/libs/binder/ndk/include_platform/android/binder_process.h
@@ -28,17 +28,33 @@
  *
  * When using this, it is expected that ABinderProcess_setupPolling and
  * ABinderProcess_handlePolledCommands are not used.
+ *
+ * Do not use this from a library. Apps setup their own threadpools, and otherwise, the main
+ * function should be responsible for configuring the threadpool for the entire application.
  */
 void ABinderProcess_startThreadPool();
 /**
  * This sets the maximum number of threads that can be started in the threadpool. By default, after
  * startThreadPool is called, this is 15. If it is called additional times, it will only prevent
  * the kernel from starting new threads and will not delete already existing threads.
+ *
+ * Do not use this from a library. Apps setup their own threadpools, and otherwise, the main
+ * function should be responsible for configuring the threadpool for the entire application.
  */
 bool ABinderProcess_setThreadPoolMaxThreadCount(uint32_t numThreads);
 /**
+ * Check if the threadpool has already been started.
+ * This tells whether someone in the process has called ABinderProcess_startThreadPool. Usually,
+ * you should use this in a library to abort if the threadpool is not started.
+ * Programs should configure binder threadpools once at the beginning.
+ */
+bool ABinderProcess_isThreadPoolStarted();
+/**
  * This adds the current thread to the threadpool. This may cause the threadpool to exceed the
  * maximum size.
+ *
+ * Do not use this from a library. Apps setup their own threadpools, and otherwise, the main
+ * function should be responsible for configuring the threadpool for the entire application.
  */
 void ABinderProcess_joinThreadPool();
 
diff --git a/libs/binder/ndk/include_platform/android/binder_stability.h b/libs/binder/ndk/include_platform/android/binder_stability.h
index 683a433..c1f62e5 100644
--- a/libs/binder/ndk/include_platform/android/binder_stability.h
+++ b/libs/binder/ndk/include_platform/android/binder_stability.h
@@ -50,6 +50,15 @@
  * requirements associated with that higher stability level. For instance, a
  * VINTF stability binder is required to be in the VINTF manifest. This API
  * can be called to use that same interface within the vendor partition.
+ *
+ * WARNING: you must hold on to a binder instance after this is set, while you
+ * are using it. If you get a binder (e.g. `...->asBinder().get()`), you must
+ * save this binder and then
+ * use it. For instance:
+ *
+ *     auto binder = ...->asBinder();
+ *     AIBinder_forceDowngradeToVendorStability(binder.get());
+ *     doSomething(binder);
  */
 void AIBinder_forceDowngradeToVendorStability(AIBinder* binder);
 
@@ -79,6 +88,15 @@
  * requirements associated with that higher stability level. For instance, a
  * VINTF stability binder is required to be in the VINTF manifest. This API
  * can be called to use that same interface within the system partition.
+ *
+ * WARNING: you must hold on to a binder instance after this is set, while you
+ * are using it. If you get a binder (e.g. `...->asBinder().get()`), you must
+ * save this binder and then
+ * use it. For instance:
+ *
+ *     auto binder = ...->asBinder();
+ *     AIBinder_forceDowngradeToSystemStability(binder.get());
+ *     doSomething(binder);
  */
 void AIBinder_forceDowngradeToSystemStability(AIBinder* binder);
 
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index 5c7005c..54e4628 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -154,6 +154,7 @@
 
 LIBBINDER_NDK34 { # introduced=UpsideDownCake
   global:
+    ABinderProcess_isThreadPoolStarted; # systemapi llndk
     AServiceManager_getUpdatableApexName; # systemapi
     AServiceManager_registerForServiceNotifications; # systemapi llndk
     AServiceManager_NotificationRegistration_delete; # systemapi llndk
diff --git a/libs/binder/ndk/process.cpp b/libs/binder/ndk/process.cpp
index ac582a4..bc6610e 100644
--- a/libs/binder/ndk/process.cpp
+++ b/libs/binder/ndk/process.cpp
@@ -31,6 +31,9 @@
 bool ABinderProcess_setThreadPoolMaxThreadCount(uint32_t numThreads) {
     return ProcessState::self()->setThreadPoolMaxThreadCount(numThreads) == 0;
 }
+bool ABinderProcess_isThreadPoolStarted() {
+    return ProcessState::self()->isThreadPoolStarted();
+}
 void ABinderProcess_joinThreadPool() {
     IPCThreadState::self()->joinThreadPool();
 }
diff --git a/libs/binder/ndk/tests/iface.cpp b/libs/binder/ndk/tests/iface.cpp
index 2afe5d2..76acff5 100644
--- a/libs/binder/ndk/tests/iface.cpp
+++ b/libs/binder/ndk/tests/iface.cpp
@@ -72,6 +72,11 @@
 AIBinder_Class* IFoo::kClass = AIBinder_Class_define(kIFooDescriptor, IFoo_Class_onCreate,
                                                      IFoo_Class_onDestroy, IFoo_Class_onTransact);
 
+// Defines the same class. Ordinarly, you would never want to do this, but it's done here
+// to simulate what would happen when multiple linker namespaces interact.
+AIBinder_Class* IFoo::kClassDupe = AIBinder_Class_define(
+        kIFooDescriptor, IFoo_Class_onCreate, IFoo_Class_onDestroy, IFoo_Class_onTransact);
+
 class BpFoo : public IFoo {
    public:
     explicit BpFoo(AIBinder* binder) : mBinder(binder) {}
diff --git a/libs/binder/ndk/tests/include/iface/iface.h b/libs/binder/ndk/tests/include/iface/iface.h
index 7408d0c..0a562f0 100644
--- a/libs/binder/ndk/tests/include/iface/iface.h
+++ b/libs/binder/ndk/tests/include/iface/iface.h
@@ -30,8 +30,13 @@
     static const char* kIFooDescriptor;
 
     static AIBinder_Class* kClass;
+    static AIBinder_Class* kClassDupe;
 
     // binder representing this interface with one reference count
+    // NOTE - this will create a new binder if it already exists. If you use
+    // getService for instance, you must pull outBinder. Don't use this without
+    // verifying isRemote or pointer equality. This is not a very good testing API - don't
+    // copy it - consider the AIDL-generated APIs instead.
     AIBinder* getBinder();
 
     // Takes ownership of IFoo
diff --git a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
index 9d5ef68..5b2532a 100644
--- a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
+++ b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
@@ -55,6 +55,18 @@
 constexpr unsigned int kShutdownWaitTime = 10;
 constexpr uint64_t kContextTestValue = 0xb4e42fb4d9a1d715;
 
+class MyTestFoo : public IFoo {
+    binder_status_t doubleNumber(int32_t in, int32_t* out) override {
+        *out = 2 * in;
+        LOG(INFO) << "doubleNumber (" << in << ") => " << *out;
+        return STATUS_OK;
+    }
+    binder_status_t die() override {
+        ADD_FAILURE() << "die called on local instance";
+        return STATUS_OK;
+    }
+};
+
 class MyBinderNdkUnitTest : public aidl::BnBinderNdkUnitTest {
     ndk::ScopedAStatus repeatInt(int32_t in, int32_t* out) {
         *out = in;
@@ -296,11 +308,10 @@
 }
 
 TEST(NdkBinder, UnimplementedDump) {
-    sp<IFoo> foo = IFoo::getService(IFoo::kSomeInstanceName);
+    ndk::SpAIBinder binder;
+    sp<IFoo> foo = IFoo::getService(IFoo::kSomeInstanceName, binder.getR());
     ASSERT_NE(foo, nullptr);
-    AIBinder* binder = foo->getBinder();
-    EXPECT_EQ(OK, AIBinder_dump(binder, STDOUT_FILENO, nullptr, 0));
-    AIBinder_decStrong(binder);
+    EXPECT_EQ(OK, AIBinder_dump(binder.get(), STDOUT_FILENO, nullptr, 0));
 }
 
 TEST(NdkBinder, UnimplementedShell) {
@@ -324,6 +335,24 @@
     EXPECT_EQ(2, out);
 }
 
+TEST(NdkBinder, ReassociateBpBinderWithSameDescriptor) {
+    ndk::SpAIBinder binder;
+    sp<IFoo> foo = IFoo::getService(IFoo::kSomeInstanceName, binder.getR());
+
+    EXPECT_TRUE(AIBinder_isRemote(binder.get()));
+
+    EXPECT_TRUE(AIBinder_associateClass(binder.get(), IFoo::kClassDupe));
+}
+
+TEST(NdkBinder, CantHaveTwoLocalBinderClassesWithSameDescriptor) {
+    sp<IFoo> foo = sp<MyTestFoo>::make();
+    ndk::SpAIBinder binder(foo->getBinder());
+
+    EXPECT_FALSE(AIBinder_isRemote(binder.get()));
+
+    EXPECT_FALSE(AIBinder_associateClass(binder.get(), IFoo::kClassDupe));
+}
+
 TEST(NdkBinder, GetTestServiceStressTest) {
     // libbinder has some complicated logic to make sure only one instance of
     // ABpBinder is associated with each binder.
@@ -545,18 +574,6 @@
     AIBinder_decStrong(binder);
 }
 
-class MyTestFoo : public IFoo {
-    binder_status_t doubleNumber(int32_t in, int32_t* out) override {
-        *out = 2 * in;
-        LOG(INFO) << "doubleNumber (" << in << ") => " << *out;
-        return STATUS_OK;
-    }
-    binder_status_t die() override {
-        ADD_FAILURE() << "die called on local instance";
-        return STATUS_OK;
-    }
-};
-
 TEST(NdkBinder, SetInheritRt) {
     // functional test in binderLibTest
     sp<IFoo> foo = sp<MyTestFoo>::make();
@@ -597,7 +614,8 @@
     sp<IFoo> foo = new MyTestFoo;
     EXPECT_EQ(EX_NONE, foo->addService(kInstanceName));
 
-    sp<IFoo> getFoo = IFoo::getService(kInstanceName);
+    ndk::SpAIBinder binder;
+    sp<IFoo> getFoo = IFoo::getService(kInstanceName, binder.getR());
     EXPECT_EQ(foo.get(), getFoo.get());
 
     int32_t out;
diff --git a/libs/binder/rust/rpcbinder/Android.bp b/libs/binder/rust/rpcbinder/Android.bp
index f70ebfc..afb73e9 100644
--- a/libs/binder/rust/rpcbinder/Android.bp
+++ b/libs/binder/rust/rpcbinder/Android.bp
@@ -68,10 +68,13 @@
     visibility: [":__subpackages__"],
     source_stem: "bindings",
     bindgen_flags: [
+        "--size_t-is-usize",
         "--blocklist-type",
         "AIBinder",
         "--raw-line",
         "use binder_ndk_sys::AIBinder;",
+        "--rustified-enum",
+        "ARpcSession_FileDescriptorTransportMode",
     ],
     rustlibs: [
         "libbinder_ndk_sys",
diff --git a/libs/binder/rust/rpcbinder/src/client.rs b/libs/binder/rust/rpcbinder/src/client.rs
deleted file mode 100644
index 48c787b..0000000
--- a/libs/binder/rust/rpcbinder/src/client.rs
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Copyright (C) 2022 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-use binder::{unstable_api::new_spibinder, FromIBinder, SpIBinder, StatusCode, Strong};
-use std::ffi::CString;
-use std::os::{
-    raw::{c_int, c_void},
-    unix::io::RawFd,
-};
-
-/// Connects to an RPC Binder server over vsock.
-pub fn get_vsock_rpc_service(cid: u32, port: u32) -> Option<SpIBinder> {
-    // SAFETY: AIBinder returned by VsockRpcClient has correct reference count,
-    // and the ownership can safely be taken by new_spibinder.
-    unsafe { new_spibinder(binder_rpc_unstable_bindgen::VsockRpcClient(cid, port)) }
-}
-
-/// Connects to an RPC Binder server for a particular interface over vsock.
-pub fn get_vsock_rpc_interface<T: FromIBinder + ?Sized>(
-    cid: u32,
-    port: u32,
-) -> Result<Strong<T>, StatusCode> {
-    interface_cast(get_vsock_rpc_service(cid, port))
-}
-
-/// Connects to an RPC Binder server over Unix domain socket.
-pub fn get_unix_domain_rpc_service(socket_name: &str) -> Option<SpIBinder> {
-    let socket_name = match CString::new(socket_name) {
-        Ok(s) => s,
-        Err(e) => {
-            log::error!("Cannot convert {} to CString. Error: {:?}", socket_name, e);
-            return None;
-        }
-    };
-    // SAFETY: AIBinder returned by UnixDomainRpcClient has correct reference count,
-    // and the ownership can safely be taken by new_spibinder.
-    unsafe { new_spibinder(binder_rpc_unstable_bindgen::UnixDomainRpcClient(socket_name.as_ptr())) }
-}
-
-/// Connects to an RPC Binder server for a particular interface over Unix domain socket.
-pub fn get_unix_domain_rpc_interface<T: FromIBinder + ?Sized>(
-    socket_name: &str,
-) -> Result<Strong<T>, StatusCode> {
-    interface_cast(get_unix_domain_rpc_service(socket_name))
-}
-
-/// Connects to an RPC Binder server, using the given callback to get (and take ownership of)
-/// file descriptors already connected to it.
-pub fn get_preconnected_rpc_service(
-    mut request_fd: impl FnMut() -> Option<RawFd>,
-) -> Option<SpIBinder> {
-    // Double reference the factory because trait objects aren't FFI safe.
-    let mut request_fd_ref: RequestFd = &mut request_fd;
-    let param = &mut request_fd_ref as *mut RequestFd as *mut c_void;
-
-    // SAFETY: AIBinder returned by RpcPreconnectedClient has correct reference count, and the
-    // ownership can be safely taken by new_spibinder. RpcPreconnectedClient does not take ownership
-    // of param, only passing it to request_fd_wrapper.
-    unsafe {
-        new_spibinder(binder_rpc_unstable_bindgen::RpcPreconnectedClient(
-            Some(request_fd_wrapper),
-            param,
-        ))
-    }
-}
-
-type RequestFd<'a> = &'a mut dyn FnMut() -> Option<RawFd>;
-
-unsafe extern "C" fn request_fd_wrapper(param: *mut c_void) -> c_int {
-    // SAFETY: This is only ever called by RpcPreconnectedClient, within the lifetime of the
-    // BinderFdFactory reference, with param being a properly aligned non-null pointer to an
-    // initialized instance.
-    let request_fd_ptr = param as *mut RequestFd;
-    let request_fd = request_fd_ptr.as_mut().unwrap();
-    if let Some(fd) = request_fd() {
-        fd
-    } else {
-        -1
-    }
-}
-
-/// Connects to an RPC Binder server for a particular interface, using the given callback to get
-/// (and take ownership of) file descriptors already connected to it.
-pub fn get_preconnected_rpc_interface<T: FromIBinder + ?Sized>(
-    request_fd: impl FnMut() -> Option<RawFd>,
-) -> Result<Strong<T>, StatusCode> {
-    interface_cast(get_preconnected_rpc_service(request_fd))
-}
-
-fn interface_cast<T: FromIBinder + ?Sized>(
-    service: Option<SpIBinder>,
-) -> Result<Strong<T>, StatusCode> {
-    if let Some(service) = service {
-        FromIBinder::try_from(service)
-    } else {
-        Err(StatusCode::NAME_NOT_FOUND)
-    }
-}
diff --git a/libs/binder/rust/rpcbinder/src/lib.rs b/libs/binder/rust/rpcbinder/src/lib.rs
index 1b719aa..a957385 100644
--- a/libs/binder/rust/rpcbinder/src/lib.rs
+++ b/libs/binder/rust/rpcbinder/src/lib.rs
@@ -16,11 +16,8 @@
 
 //! API for RPC Binder services.
 
-mod client;
 mod server;
+mod session;
 
-pub use client::{
-    get_preconnected_rpc_interface, get_preconnected_rpc_service, get_unix_domain_rpc_interface,
-    get_unix_domain_rpc_service, get_vsock_rpc_interface, get_vsock_rpc_service,
-};
-pub use server::{run_vsock_rpc_server_with_factory, RpcServer, RpcServerRef};
+pub use server::{RpcServer, RpcServerRef};
+pub use session::{FileDescriptorTransportMode, RpcSession, RpcSessionRef};
diff --git a/libs/binder/rust/rpcbinder/src/server.rs b/libs/binder/rust/rpcbinder/src/server.rs
index 42f5567..761b306 100644
--- a/libs/binder/rust/rpcbinder/src/server.rs
+++ b/libs/binder/rust/rpcbinder/src/server.rs
@@ -14,14 +14,13 @@
  * limitations under the License.
  */
 
-use binder::{
-    unstable_api::{AIBinder, AsNative},
-    SpIBinder,
-};
+use crate::session::FileDescriptorTransportMode;
+use binder::{unstable_api::AsNative, SpIBinder};
 use binder_rpc_unstable_bindgen::ARpcServer;
 use foreign_types::{foreign_type, ForeignType, ForeignTypeRef};
+use std::ffi::CString;
 use std::io::{Error, ErrorKind};
-use std::{ffi::CString, os::raw, ptr::null_mut};
+use std::os::unix::io::{IntoRawFd, OwnedFd};
 
 foreign_type! {
     type CType = binder_rpc_unstable_bindgen::ARpcServer;
@@ -41,14 +40,19 @@
 
 impl RpcServer {
     /// Creates a binder RPC server, serving the supplied binder service implementation on the given
-    /// vsock port.
-    pub fn new_vsock(mut service: SpIBinder, port: u32) -> Result<RpcServer, Error> {
+    /// vsock port. Only connections from the given CID are accepted.
+    ///
+    // Set `cid` to libc::VMADDR_CID_ANY to accept connections from any client.
+    // Set `cid` to libc::VMADDR_CID_LOCAL to only bind to the local vsock interface.
+    pub fn new_vsock(mut service: SpIBinder, cid: u32, port: u32) -> Result<RpcServer, Error> {
         let service = service.as_native_mut();
 
         // SAFETY: Service ownership is transferring to the server and won't be valid afterward.
         // Plus the binder objects are threadsafe.
         unsafe {
-            Self::checked_from_ptr(binder_rpc_unstable_bindgen::ARpcServer_newVsock(service, port))
+            Self::checked_from_ptr(binder_rpc_unstable_bindgen::ARpcServer_newVsock(
+                service, cid, port,
+            ))
         }
     }
 
@@ -77,6 +81,27 @@
         }
     }
 
+    /// Creates a binder RPC server that bootstraps sessions using an existing Unix domain socket
+    /// pair, with a given root IBinder object. Callers should create a pair of SOCK_STREAM Unix
+    /// domain sockets, pass one to the server and the other to the client. Multiple client session
+    /// can be created from the client end of the pair.
+    pub fn new_unix_domain_bootstrap(
+        mut service: SpIBinder,
+        bootstrap_fd: OwnedFd,
+    ) -> Result<RpcServer, Error> {
+        let service = service.as_native_mut();
+
+        // SAFETY: Service ownership is transferring to the server and won't be valid afterward.
+        // Plus the binder objects are threadsafe.
+        // The server takes ownership of the bootstrap FD.
+        unsafe {
+            Self::checked_from_ptr(binder_rpc_unstable_bindgen::ARpcServer_newUnixDomainBootstrap(
+                service,
+                bootstrap_fd.into_raw_fd(),
+            ))
+        }
+    }
+
     unsafe fn checked_from_ptr(ptr: *mut ARpcServer) -> Result<RpcServer, Error> {
         if ptr.is_null() {
             return Err(Error::new(ErrorKind::Other, "Failed to start server"));
@@ -86,6 +111,22 @@
 }
 
 impl RpcServerRef {
+    /// Sets the list of file descriptor transport modes supported by this server.
+    pub fn set_supported_file_descriptor_transport_modes(
+        &self,
+        modes: &[FileDescriptorTransportMode],
+    ) {
+        // SAFETY - Does not keep the pointer after returning does, nor does it
+        // read past its boundary. Only passes the 'self' pointer as an opaque handle.
+        unsafe {
+            binder_rpc_unstable_bindgen::ARpcServer_setSupportedFileDescriptorTransportModes(
+                self.as_ptr(),
+                modes.as_ptr(),
+                modes.len(),
+            )
+        }
+    }
+
     /// Starts a new background thread and calls join(). Returns immediately.
     pub fn start(&self) {
         unsafe { binder_rpc_unstable_bindgen::ARpcServer_start(self.as_ptr()) };
@@ -99,51 +140,11 @@
 
     /// Shuts down the running RpcServer. Can be called multiple times and from
     /// multiple threads. Called automatically during drop().
-    pub fn shutdown(&self) {
-        unsafe { binder_rpc_unstable_bindgen::ARpcServer_shutdown(self.as_ptr()) };
-    }
-}
-
-type RpcServerFactoryRef<'a> = &'a mut (dyn FnMut(u32) -> Option<SpIBinder> + Send + Sync);
-
-/// Runs a binder RPC server, using the given factory function to construct a binder service
-/// implementation for each connection.
-///
-/// The current thread is joined to the binder thread pool to handle incoming messages.
-///
-/// Returns true if the server has shutdown normally, false if it failed in some way.
-pub fn run_vsock_rpc_server_with_factory(
-    port: u32,
-    mut factory: impl FnMut(u32) -> Option<SpIBinder> + Send + Sync,
-) -> bool {
-    // Double reference the factory because trait objects aren't FFI safe.
-    // NB: The type annotation is necessary to ensure that we have a `dyn` rather than an `impl`.
-    let mut factory_ref: RpcServerFactoryRef = &mut factory;
-    let context = &mut factory_ref as *mut RpcServerFactoryRef as *mut raw::c_void;
-
-    // SAFETY: `factory_wrapper` is only ever called by `RunVsockRpcServerWithFactory`, with context
-    // taking the pointer value above (so a properly aligned non-null pointer to an initialized
-    // `RpcServerFactoryRef`), within the lifetime of `factory_ref` (i.e. no more calls will be made
-    // after `RunVsockRpcServerWithFactory` returns).
-    unsafe {
-        binder_rpc_unstable_bindgen::RunVsockRpcServerWithFactory(
-            Some(factory_wrapper),
-            context,
-            port,
-        )
-    }
-}
-
-unsafe extern "C" fn factory_wrapper(cid: u32, context: *mut raw::c_void) -> *mut AIBinder {
-    // SAFETY: `context` was created from an `&mut RpcServerFactoryRef` by
-    // `run_vsock_rpc_server_with_factory`, and we are still within the lifetime of the value it is
-    // pointing to.
-    let factory_ptr = context as *mut RpcServerFactoryRef;
-    let factory = factory_ptr.as_mut().unwrap();
-
-    if let Some(mut service) = factory(cid) {
-        service.as_native_mut()
-    } else {
-        null_mut()
+    pub fn shutdown(&self) -> Result<(), Error> {
+        if unsafe { binder_rpc_unstable_bindgen::ARpcServer_shutdown(self.as_ptr()) } {
+            Ok(())
+        } else {
+            Err(Error::from(ErrorKind::UnexpectedEof))
+        }
     }
 }
diff --git a/libs/binder/rust/rpcbinder/src/session.rs b/libs/binder/rust/rpcbinder/src/session.rs
new file mode 100644
index 0000000..62fedb1
--- /dev/null
+++ b/libs/binder/rust/rpcbinder/src/session.rs
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use binder::unstable_api::new_spibinder;
+use binder::{FromIBinder, SpIBinder, StatusCode, Strong};
+use foreign_types::{foreign_type, ForeignType, ForeignTypeRef};
+use std::ffi::CString;
+use std::os::{
+    raw::{c_int, c_void},
+    unix::io::{AsRawFd, BorrowedFd, RawFd},
+};
+
+pub use binder_rpc_unstable_bindgen::ARpcSession_FileDescriptorTransportMode as FileDescriptorTransportMode;
+
+foreign_type! {
+    type CType = binder_rpc_unstable_bindgen::ARpcSession;
+    fn drop = binder_rpc_unstable_bindgen::ARpcSession_free;
+
+    /// A type that represents a foreign instance of RpcSession.
+    #[derive(Debug)]
+    pub struct RpcSession;
+    /// A borrowed RpcSession.
+    pub struct RpcSessionRef;
+}
+
+/// SAFETY - The opaque handle can be cloned freely.
+unsafe impl Send for RpcSession {}
+/// SAFETY - The underlying C++ RpcSession class is thread-safe.
+unsafe impl Sync for RpcSession {}
+
+impl RpcSession {
+    /// Allocates a new RpcSession object.
+    pub fn new() -> RpcSession {
+        // SAFETY - Takes ownership of the returned handle, which has correct refcount.
+        unsafe { RpcSession::from_ptr(binder_rpc_unstable_bindgen::ARpcSession_new()) }
+    }
+}
+
+impl Default for RpcSession {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl RpcSessionRef {
+    /// Sets the file descriptor transport mode for this session.
+    pub fn set_file_descriptor_transport_mode(&self, mode: FileDescriptorTransportMode) {
+        // SAFETY - Only passes the 'self' pointer as an opaque handle.
+        unsafe {
+            binder_rpc_unstable_bindgen::ARpcSession_setFileDescriptorTransportMode(
+                self.as_ptr(),
+                mode,
+            )
+        };
+    }
+
+    /// Sets the maximum number of incoming threads.
+    pub fn set_max_incoming_threads(&self, threads: usize) {
+        // SAFETY - Only passes the 'self' pointer as an opaque handle.
+        unsafe {
+            binder_rpc_unstable_bindgen::ARpcSession_setMaxIncomingThreads(self.as_ptr(), threads)
+        };
+    }
+
+    /// Sets the maximum number of outgoing threads.
+    pub fn set_max_outgoing_threads(&self, threads: usize) {
+        // SAFETY - Only passes the 'self' pointer as an opaque handle.
+        unsafe {
+            binder_rpc_unstable_bindgen::ARpcSession_setMaxOutgoingThreads(self.as_ptr(), threads)
+        };
+    }
+
+    /// Connects to an RPC Binder server over vsock for a particular interface.
+    pub fn setup_vsock_client<T: FromIBinder + ?Sized>(
+        &self,
+        cid: u32,
+        port: u32,
+    ) -> Result<Strong<T>, StatusCode> {
+        // SAFETY: AIBinder returned by ARpcSession_setupVsockClient has correct
+        // reference count, and the ownership can safely be taken by new_spibinder.
+        let service = unsafe {
+            new_spibinder(binder_rpc_unstable_bindgen::ARpcSession_setupVsockClient(
+                self.as_ptr(),
+                cid,
+                port,
+            ))
+        };
+        Self::get_interface(service)
+    }
+
+    /// Connects to an RPC Binder server over a names Unix Domain Socket for
+    /// a particular interface.
+    pub fn setup_unix_domain_client<T: FromIBinder + ?Sized>(
+        &self,
+        socket_name: &str,
+    ) -> Result<Strong<T>, StatusCode> {
+        let socket_name = match CString::new(socket_name) {
+            Ok(s) => s,
+            Err(e) => {
+                log::error!("Cannot convert {} to CString. Error: {:?}", socket_name, e);
+                return Err(StatusCode::NAME_NOT_FOUND);
+            }
+        };
+
+        // SAFETY: AIBinder returned by ARpcSession_setupUnixDomainClient has correct
+        // reference count, and the ownership can safely be taken by new_spibinder.
+        let service = unsafe {
+            new_spibinder(binder_rpc_unstable_bindgen::ARpcSession_setupUnixDomainClient(
+                self.as_ptr(),
+                socket_name.as_ptr(),
+            ))
+        };
+        Self::get_interface(service)
+    }
+
+    /// Connects to an RPC Binder server over a bootstrap Unix Domain Socket
+    /// for a particular interface.
+    pub fn setup_unix_domain_bootstrap_client<T: FromIBinder + ?Sized>(
+        &self,
+        bootstrap_fd: BorrowedFd,
+    ) -> Result<Strong<T>, StatusCode> {
+        // SAFETY: ARpcSession_setupUnixDomainBootstrapClient does not take
+        // ownership of bootstrap_fd. The returned AIBinder has correct
+        // reference count, and the ownership can safely be taken by new_spibinder.
+        let service = unsafe {
+            new_spibinder(binder_rpc_unstable_bindgen::ARpcSession_setupUnixDomainBootstrapClient(
+                self.as_ptr(),
+                bootstrap_fd.as_raw_fd(),
+            ))
+        };
+        Self::get_interface(service)
+    }
+
+    /// Connects to an RPC Binder server, using the given callback to get (and
+    /// take ownership of) file descriptors already connected to it.
+    pub fn setup_preconnected_client<T: FromIBinder + ?Sized>(
+        &self,
+        mut request_fd: impl FnMut() -> Option<RawFd>,
+    ) -> Result<Strong<T>, StatusCode> {
+        // Double reference the factory because trait objects aren't FFI safe.
+        let mut request_fd_ref: RequestFd = &mut request_fd;
+        let param = &mut request_fd_ref as *mut RequestFd as *mut c_void;
+
+        // SAFETY: AIBinder returned by RpcPreconnectedClient has correct reference count, and the
+        // ownership can be safely taken by new_spibinder. RpcPreconnectedClient does not take ownership
+        // of param, only passing it to request_fd_wrapper.
+        let service = unsafe {
+            new_spibinder(binder_rpc_unstable_bindgen::ARpcSession_setupPreconnectedClient(
+                self.as_ptr(),
+                Some(request_fd_wrapper),
+                param,
+            ))
+        };
+        Self::get_interface(service)
+    }
+
+    fn get_interface<T: FromIBinder + ?Sized>(
+        service: Option<SpIBinder>,
+    ) -> Result<Strong<T>, StatusCode> {
+        if let Some(service) = service {
+            FromIBinder::try_from(service)
+        } else {
+            Err(StatusCode::NAME_NOT_FOUND)
+        }
+    }
+}
+
+type RequestFd<'a> = &'a mut dyn FnMut() -> Option<RawFd>;
+
+unsafe extern "C" fn request_fd_wrapper(param: *mut c_void) -> c_int {
+    // SAFETY: This is only ever called by RpcPreconnectedClient, within the lifetime of the
+    // BinderFdFactory reference, with param being a properly aligned non-null pointer to an
+    // initialized instance.
+    let request_fd_ptr = param as *mut RequestFd;
+    let request_fd = request_fd_ptr.as_mut().unwrap();
+    request_fd().unwrap_or(-1)
+}
diff --git a/libs/binder/rust/tests/parcel_fuzzer/Android.bp b/libs/binder/rust/tests/parcel_fuzzer/Android.bp
index 28e0200..df8a2af 100644
--- a/libs/binder/rust/tests/parcel_fuzzer/Android.bp
+++ b/libs/binder/rust/tests/parcel_fuzzer/Android.bp
@@ -21,5 +21,7 @@
             "waghpawan@google.com",
             "smoreland@google.com",
         ],
+        // hotlist "AIDL fuzzers bugs" on buganizer
+        hotlists: ["4637097"],
     },
 }
diff --git a/libs/binder/rust/tests/parcel_fuzzer/random_parcel/fuzz_service_test/Android.bp b/libs/binder/rust/tests/parcel_fuzzer/random_parcel/fuzz_service_test/Android.bp
index 43e407c..5cb406a 100644
--- a/libs/binder/rust/tests/parcel_fuzzer/random_parcel/fuzz_service_test/Android.bp
+++ b/libs/binder/rust/tests/parcel_fuzzer/random_parcel/fuzz_service_test/Android.bp
@@ -29,5 +29,7 @@
             "waghpawan@google.com",
             "smoreland@google.com",
         ],
+        // hotlist "AIDL fuzzers bugs" on buganizer
+        hotlists: ["4637097"],
     },
 }
diff --git a/libs/binder/tests/binderAllocationLimits.cpp b/libs/binder/tests/binderAllocationLimits.cpp
index 55a3916..6a6e008 100644
--- a/libs/binder/tests/binderAllocationLimits.cpp
+++ b/libs/binder/tests/binderAllocationLimits.cpp
@@ -172,6 +172,24 @@
     a_binder->pingBinder();
 }
 
+TEST(BinderAllocation, InterfaceDescriptorTransaction) {
+    sp<IBinder> a_binder = GetRemoteBinder();
+
+    size_t mallocs = 0;
+    const auto on_malloc = OnMalloc([&](size_t bytes) {
+        mallocs++;
+        // Happens to be SM package length. We could switch to forking
+        // and registering our own service if it became an issue.
+        EXPECT_EQ(bytes, 78);
+    });
+
+    a_binder->getInterfaceDescriptor();
+    a_binder->getInterfaceDescriptor();
+    a_binder->getInterfaceDescriptor();
+
+    EXPECT_EQ(mallocs, 1);
+}
+
 TEST(BinderAllocation, SmallTransaction) {
     String16 empty_descriptor = String16("");
     sp<IServiceManager> manager = defaultServiceManager();
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index 25b524f..f7498c4 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -120,6 +120,7 @@
     BINDER_LIB_TEST_CAN_GET_SID,
     BINDER_LIB_TEST_GET_MAX_THREAD_COUNT,
     BINDER_LIB_TEST_SET_MAX_THREAD_COUNT,
+    BINDER_LIB_TEST_IS_THREADPOOL_STARTED,
     BINDER_LIB_TEST_LOCK_UNLOCK,
     BINDER_LIB_TEST_PROCESS_LOCK,
     BINDER_LIB_TEST_UNLOCK_AFTER_MS,
@@ -1383,6 +1384,14 @@
     EXPECT_EQ(replyi, kKernelThreads + 1);
 }
 
+TEST_F(BinderLibTest, ThreadPoolStarted) {
+    Parcel data, reply;
+    sp<IBinder> server = addServer();
+    ASSERT_TRUE(server != nullptr);
+    EXPECT_THAT(server->transact(BINDER_LIB_TEST_IS_THREADPOOL_STARTED, data, &reply), NO_ERROR);
+    EXPECT_TRUE(reply.readBool());
+}
+
 size_t epochMillis() {
     using std::chrono::duration_cast;
     using std::chrono::milliseconds;
@@ -1849,6 +1858,10 @@
                 reply->writeInt32(ProcessState::self()->getThreadPoolMaxTotalThreadCount());
                 return NO_ERROR;
             }
+            case BINDER_LIB_TEST_IS_THREADPOOL_STARTED: {
+                reply->writeBool(ProcessState::self()->isThreadPoolStarted());
+                return NO_ERROR;
+            }
             case BINDER_LIB_TEST_PROCESS_LOCK: {
                 m_blockMutex.lock();
                 return NO_ERROR;
diff --git a/libs/binder/tests/binderRpcTest.cpp b/libs/binder/tests/binderRpcTest.cpp
index 02aa45f..8afa49b 100644
--- a/libs/binder/tests/binderRpcTest.cpp
+++ b/libs/binder/tests/binderRpcTest.cpp
@@ -372,12 +372,12 @@
         ts.push_back(std::thread([&] { proc.rootIface->lockUnlock(); }));
     }
 
-    usleep(10000); // give chance for calls on other threads
+    usleep(100000); // give chance for calls on other threads
 
     // other calls still work
     EXPECT_EQ(OK, proc.rootBinder->pingBinder());
 
-    constexpr size_t blockTimeMs = 50;
+    constexpr size_t blockTimeMs = 100;
     size_t epochMsBefore = epochMillis();
     // after this, we should never see a response within this time
     EXPECT_OK(proc.rootIface->unlockInMsAsync(blockTimeMs));
@@ -1342,7 +1342,7 @@
                 } break;
                 case SocketType::VSOCK: {
                     auto port = allocateVsockPort();
-                    auto status = rpcServer->setupVsockServer(port);
+                    auto status = rpcServer->setupVsockServer(VMADDR_CID_LOCAL, port);
                     if (status != OK) {
                         return AssertionFailure() << "setupVsockServer: " << statusToString(status);
                     }
diff --git a/libs/binder/tests/binderRpcTestService.cpp b/libs/binder/tests/binderRpcTestService.cpp
index 995e761..cc9726b 100644
--- a/libs/binder/tests/binderRpcTestService.cpp
+++ b/libs/binder/tests/binderRpcTestService.cpp
@@ -58,7 +58,7 @@
             CHECK_EQ(OK, server->setupRawSocketServer(std::move(socketFd)));
             break;
         case SocketType::VSOCK:
-            CHECK_EQ(OK, server->setupVsockServer(serverConfig.vsockPort));
+            CHECK_EQ(OK, server->setupVsockServer(VMADDR_CID_LOCAL, serverConfig.vsockPort));
             break;
         case SocketType::INET: {
             CHECK_EQ(OK, server->setupInetServer(kLocalInetAddress, 0, &outPort));
diff --git a/libs/binder/tests/parcel_fuzzer/libbinder_driver.cpp b/libs/binder/tests/parcel_fuzzer/libbinder_driver.cpp
index 86461c8..8bef33f 100644
--- a/libs/binder/tests/parcel_fuzzer/libbinder_driver.cpp
+++ b/libs/binder/tests/parcel_fuzzer/libbinder_driver.cpp
@@ -37,7 +37,9 @@
     }
 
     while (provider.remaining_bytes() > 0) {
-        uint32_t code = provider.ConsumeIntegral<uint32_t>();
+        // Most of the AIDL services will have small set of transaction codes.
+        uint32_t code = provider.ConsumeBool() ? provider.ConsumeIntegral<uint32_t>()
+                                               : provider.ConsumeIntegralInRange<uint32_t>(0, 100);
         uint32_t flags = provider.ConsumeIntegral<uint32_t>();
         Parcel data;
         // for increased fuzz coverage
diff --git a/libs/binder/tests/parcel_fuzzer/random_parcel.cpp b/libs/binder/tests/parcel_fuzzer/random_parcel.cpp
index edc695f..f0beed2 100644
--- a/libs/binder/tests/parcel_fuzzer/random_parcel.cpp
+++ b/libs/binder/tests/parcel_fuzzer/random_parcel.cpp
@@ -73,6 +73,11 @@
                                                                                 1));
                         CHECK(OK == p->writeFileDescriptor(fd.get(), false /*takeOwnership*/));
                     } else {
+                        // b/260119717 - Adding more FDs can eventually lead to FD limit exhaustion
+                        if (options->extraFds.size() > 1000) {
+                            return;
+                        }
+
                         std::vector<base::unique_fd> fds = getRandomFds(&provider);
                         CHECK(OK ==
                               p->writeFileDescriptor(fds.begin()->release(),
diff --git a/libs/binder/tests/rpc_fuzzer/main.cpp b/libs/binder/tests/rpc_fuzzer/main.cpp
index f68a561..b8ae84d 100644
--- a/libs/binder/tests/rpc_fuzzer/main.cpp
+++ b/libs/binder/tests/rpc_fuzzer/main.cpp
@@ -133,8 +133,13 @@
 
     bool hangupBeforeShutdown = provider.ConsumeBool();
 
+    // b/260736889 - limit arbitrarily, due to thread resource exhaustion, which currently
+    // aborts. Servers should consider RpcServer::setConnectionFilter instead.
+    constexpr size_t kMaxConnections = 1000;
+
     while (provider.remaining_bytes() > 0) {
-        if (connections.empty() || provider.ConsumeBool()) {
+        if (connections.empty() ||
+            (connections.size() < kMaxConnections && provider.ConsumeBool())) {
             base::unique_fd fd(TEMP_FAILURE_RETRY(socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0)));
             CHECK_NE(fd.get(), -1);
             CHECK_EQ(0,
diff --git a/libs/binder/trusty/RpcTransportTipcTrusty.cpp b/libs/binder/trusty/RpcTransportTipcTrusty.cpp
index 58bfe71..d249b2e 100644
--- a/libs/binder/trusty/RpcTransportTipcTrusty.cpp
+++ b/libs/binder/trusty/RpcTransportTipcTrusty.cpp
@@ -239,6 +239,12 @@
         }
         if (!(uevt.event & IPC_HANDLE_POLL_MSG)) {
             /* No message, terminate here and leave mHaveMessage false */
+            if (uevt.event & IPC_HANDLE_POLL_HUP) {
+                // Peer closed the connection. We need to preserve the order
+                // between MSG and HUP from FdTrigger.cpp, which means that
+                // getting MSG&HUP should return OK instead of DEAD_OBJECT.
+                return DEAD_OBJECT;
+            }
             return OK;
         }
 
diff --git a/libs/binder/trusty/include/log/log.h b/libs/binder/trusty/include/log/log.h
index d88d18a..de84617 100644
--- a/libs/binder/trusty/include/log/log.h
+++ b/libs/binder/trusty/include/log/log.h
@@ -121,6 +121,8 @@
         TLOGE("android_errorWriteLog: tag:%x subTag:%s\n", tag, subTag); \
     } while (0)
 
-extern "C" inline void __assert(const char* file, int line, const char* str) {
-    LOG_ALWAYS_FATAL("%s:%d: assertion \"%s\" failed", file, line, str);
-}
+// Override the definition of __assert from binder_status.h
+#ifndef __BIONIC__
+#undef __assert
+#define __assert(file, line, str) LOG_ALWAYS_FATAL("%s:%d: %s", file, line, str)
+#endif // __BIONIC__
diff --git a/libs/binder/trusty/kernel/rules.mk b/libs/binder/trusty/kernel/rules.mk
new file mode 100644
index 0000000..ab7a50d
--- /dev/null
+++ b/libs/binder/trusty/kernel/rules.mk
@@ -0,0 +1,83 @@
+# Copyright (C) 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+MODULE := $(LOCAL_DIR)
+
+LIBBINDER_DIR := frameworks/native/libs/binder
+LIBBASE_DIR := system/libbase
+LIBCUTILS_DIR := system/core/libcutils
+LIBUTILS_DIR := system/core/libutils
+FMTLIB_DIR := external/fmtlib
+
+MODULE_SRCS := \
+	$(LOCAL_DIR)/../logging.cpp \
+	$(LOCAL_DIR)/../TrustyStatus.cpp \
+	$(LIBBINDER_DIR)/Binder.cpp \
+	$(LIBBINDER_DIR)/BpBinder.cpp \
+	$(LIBBINDER_DIR)/FdTrigger.cpp \
+	$(LIBBINDER_DIR)/IInterface.cpp \
+	$(LIBBINDER_DIR)/IResultReceiver.cpp \
+	$(LIBBINDER_DIR)/Parcel.cpp \
+	$(LIBBINDER_DIR)/Stability.cpp \
+	$(LIBBINDER_DIR)/Status.cpp \
+	$(LIBBINDER_DIR)/Utils.cpp \
+	$(LIBBASE_DIR)/hex.cpp \
+	$(LIBBASE_DIR)/stringprintf.cpp \
+	$(LIBUTILS_DIR)/Errors.cpp \
+	$(LIBUTILS_DIR)/misc.cpp \
+	$(LIBUTILS_DIR)/RefBase.cpp \
+	$(LIBUTILS_DIR)/StrongPointer.cpp \
+	$(LIBUTILS_DIR)/Unicode.cpp \
+
+# TODO: remove the following when libbinder supports std::string
+# instead of String16 and String8 for Status and descriptors
+MODULE_SRCS += \
+	$(LIBUTILS_DIR)/SharedBuffer.cpp \
+	$(LIBUTILS_DIR)/String16.cpp \
+	$(LIBUTILS_DIR)/String8.cpp \
+
+# TODO: disable dump() transactions to get rid of Vector
+MODULE_SRCS += \
+	$(LIBUTILS_DIR)/VectorImpl.cpp \
+
+MODULE_DEFINES += \
+	LK_DEBUGLEVEL_NO_ALIASES=1 \
+
+MODULE_INCLUDES += \
+	$(LOCAL_DIR)/.. \
+
+GLOBAL_INCLUDES += \
+	$(LOCAL_DIR)/include \
+	$(LOCAL_DIR)/../include \
+	$(LIBBINDER_DIR)/include \
+	$(LIBBINDER_DIR)/ndk/include_cpp \
+	$(LIBBASE_DIR)/include \
+	$(LIBCUTILS_DIR)/include \
+	$(LIBUTILS_DIR)/include \
+	$(FMTLIB_DIR)/include \
+
+GLOBAL_COMPILEFLAGS += \
+	-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION \
+	-DBINDER_NO_KERNEL_IPC \
+	-DBINDER_RPC_SINGLE_THREADED \
+	-D__ANDROID_VNDK__ \
+
+MODULE_DEPS += \
+	trusty/kernel/lib/libcxx-trusty \
+	trusty/kernel/lib/libcxxabi-trusty \
+
+include make/module.mk
diff --git a/libs/graphicsenv/GpuStatsInfo.cpp b/libs/graphicsenv/GpuStatsInfo.cpp
index 858739c..7b74214 100644
--- a/libs/graphicsenv/GpuStatsInfo.cpp
+++ b/libs/graphicsenv/GpuStatsInfo.cpp
@@ -89,6 +89,14 @@
     if ((status = parcel->writeBool(falsePrerotation)) != OK) return status;
     if ((status = parcel->writeBool(gles1InUse)) != OK) return status;
     if ((status = parcel->writeBool(angleInUse)) != OK) return status;
+    if ((status = parcel->writeBool(createdGlesContext)) != OK) return status;
+    if ((status = parcel->writeBool(createdVulkanDevice)) != OK) return status;
+    if ((status = parcel->writeBool(createdVulkanSwapchain)) != OK) return status;
+    if ((status = parcel->writeUint32(vulkanApiVersion)) != OK) return status;
+    if ((status = parcel->writeUint64(vulkanDeviceFeaturesEnabled)) != OK) return status;
+    if ((status = parcel->writeInt32Vector(vulkanInstanceExtensions)) != OK) return status;
+    if ((status = parcel->writeInt32Vector(vulkanDeviceExtensions)) != OK) return status;
+
     return OK;
 }
 
@@ -103,6 +111,14 @@
     if ((status = parcel->readBool(&falsePrerotation)) != OK) return status;
     if ((status = parcel->readBool(&gles1InUse)) != OK) return status;
     if ((status = parcel->readBool(&angleInUse)) != OK) return status;
+    if ((status = parcel->readBool(&createdGlesContext)) != OK) return status;
+    if ((status = parcel->readBool(&createdVulkanDevice)) != OK) return status;
+    if ((status = parcel->readBool(&createdVulkanSwapchain)) != OK) return status;
+    if ((status = parcel->readUint32(&vulkanApiVersion)) != OK) return status;
+    if ((status = parcel->readUint64(&vulkanDeviceFeaturesEnabled)) != OK) return status;
+    if ((status = parcel->readInt32Vector(&vulkanInstanceExtensions)) != OK) return status;
+    if ((status = parcel->readInt32Vector(&vulkanDeviceExtensions)) != OK) return status;
+
     return OK;
 }
 
@@ -114,6 +130,12 @@
     StringAppendF(&result, "falsePrerotation = %d\n", falsePrerotation);
     StringAppendF(&result, "gles1InUse = %d\n", gles1InUse);
     StringAppendF(&result, "angleInUse = %d\n", angleInUse);
+    StringAppendF(&result, "createdGlesContext = %d\n", createdGlesContext);
+    StringAppendF(&result, "createdVulkanDevice = %d\n", createdVulkanDevice);
+    StringAppendF(&result, "createdVulkanSwapchain = %d\n", createdVulkanSwapchain);
+    StringAppendF(&result, "vulkanApiVersion = 0x%" PRIx32 "\n", vulkanApiVersion);
+    StringAppendF(&result, "vulkanDeviceFeaturesEnabled = 0x%" PRIx64 "\n",
+                  vulkanDeviceFeaturesEnabled);
     result.append("glDriverLoadingTime:");
     for (int32_t loadingTime : glDriverLoadingTime) {
         StringAppendF(&result, " %d", loadingTime);
@@ -129,6 +151,16 @@
         StringAppendF(&result, " %d", loadingTime);
     }
     result.append("\n");
+    result.append("vulkanInstanceExtensions:");
+    for (int32_t extension : vulkanInstanceExtensions) {
+        StringAppendF(&result, " 0x%x", extension);
+    }
+    result.append("\n");
+    result.append("vulkanDeviceExtensions:");
+    for (int32_t extension : vulkanDeviceExtensions) {
+        StringAppendF(&result, " 0x%x", extension);
+    }
+    result.append("\n");
     return result;
 }
 
diff --git a/libs/graphicsenv/GraphicsEnv.cpp b/libs/graphicsenv/GraphicsEnv.cpp
index 5f5f85a..46dd62d 100644
--- a/libs/graphicsenv/GraphicsEnv.cpp
+++ b/libs/graphicsenv/GraphicsEnv.cpp
@@ -259,6 +259,57 @@
     sendGpuStatsLocked(api, isDriverLoaded, driverLoadingTime);
 }
 
+// Hash function to calculate hash for null-terminated Vulkan extension names
+// We store hash values of the extensions, rather than the actual names or
+// indices to be able to support new extensions easily, avoid creating
+// a table of 'known' extensions inside Android and reduce the runtime overhead.
+static uint64_t calculateExtensionHash(const char* word) {
+    if (!word) {
+        return 0;
+    }
+    const size_t wordLen = strlen(word);
+    const uint32_t seed = 167;
+    uint64_t hash = 0;
+    for (size_t i = 0; i < wordLen; i++) {
+        hash = (hash * seed) + word[i];
+    }
+    return hash;
+}
+
+void GraphicsEnv::setVulkanInstanceExtensions(uint32_t enabledExtensionCount,
+                                              const char* const* ppEnabledExtensionNames) {
+    ATRACE_CALL();
+    if (enabledExtensionCount == 0 || ppEnabledExtensionNames == nullptr) {
+        return;
+    }
+
+    const uint32_t maxNumStats = android::GpuStatsAppInfo::MAX_NUM_EXTENSIONS;
+    uint64_t extensionHashes[maxNumStats];
+    const uint32_t numStats = std::min(enabledExtensionCount, maxNumStats);
+    for(uint32_t i = 0; i < numStats; i++) {
+        extensionHashes[i] = calculateExtensionHash(ppEnabledExtensionNames[i]);
+    }
+    setTargetStatsArray(android::GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION,
+                        extensionHashes, numStats);
+}
+
+void GraphicsEnv::setVulkanDeviceExtensions(uint32_t enabledExtensionCount,
+                                            const char* const* ppEnabledExtensionNames) {
+    ATRACE_CALL();
+    if (enabledExtensionCount == 0 || ppEnabledExtensionNames == nullptr) {
+        return;
+    }
+
+    const uint32_t maxNumStats = android::GpuStatsAppInfo::MAX_NUM_EXTENSIONS;
+    uint64_t extensionHashes[maxNumStats];
+    const uint32_t numStats = std::min(enabledExtensionCount, maxNumStats);
+    for(uint32_t i = 0; i < numStats; i++) {
+        extensionHashes[i] = calculateExtensionHash(ppEnabledExtensionNames[i]);
+    }
+    setTargetStatsArray(android::GpuStatsInfo::Stats::VULKAN_DEVICE_EXTENSION,
+                        extensionHashes, numStats);
+}
+
 static sp<IGpuService> getGpuService() {
     static const sp<IBinder> binder = defaultServiceManager()->checkService(String16("gpu"));
     if (!binder) {
@@ -276,6 +327,11 @@
 }
 
 void GraphicsEnv::setTargetStats(const GpuStatsInfo::Stats stats, const uint64_t value) {
+    return setTargetStatsArray(stats, &value, 1);
+}
+
+void GraphicsEnv::setTargetStatsArray(const GpuStatsInfo::Stats stats, const uint64_t* values,
+                                      const uint32_t valueCount) {
     ATRACE_CALL();
 
     std::lock_guard<std::mutex> lock(mStatsLock);
@@ -283,8 +339,8 @@
 
     const sp<IGpuService> gpuService = getGpuService();
     if (gpuService) {
-        gpuService->setTargetStats(mGpuStats.appPackageName, mGpuStats.driverVersionCode, stats,
-                                   value);
+        gpuService->setTargetStatsArray(mGpuStats.appPackageName, mGpuStats.driverVersionCode,
+                                        stats, values, valueCount);
     }
 }
 
diff --git a/libs/graphicsenv/IGpuService.cpp b/libs/graphicsenv/IGpuService.cpp
index fa25c55..ceb52f7 100644
--- a/libs/graphicsenv/IGpuService.cpp
+++ b/libs/graphicsenv/IGpuService.cpp
@@ -61,6 +61,14 @@
         remote()->transact(BnGpuService::SET_TARGET_STATS, data, &reply, IBinder::FLAG_ONEWAY);
     }
 
+    void setTargetStatsArray(const std::string& appPackageName, const uint64_t driverVersionCode,
+                             const GpuStatsInfo::Stats stats, const uint64_t* values,
+                             const uint32_t valueCount) override {
+        for (uint32_t i = 0; i < valueCount; i++) {
+            setTargetStats(appPackageName, driverVersionCode, stats, values[i]);
+        }
+    }
+
     void setUpdatableDriverPath(const std::string& driverPath) override {
         Parcel data, reply;
         data.writeInterfaceToken(IGpuService::getInterfaceDescriptor());
diff --git a/libs/graphicsenv/include/graphicsenv/GpuStatsInfo.h b/libs/graphicsenv/include/graphicsenv/GpuStatsInfo.h
index 5b513d2..47607a0 100644
--- a/libs/graphicsenv/include/graphicsenv/GpuStatsInfo.h
+++ b/libs/graphicsenv/include/graphicsenv/GpuStatsInfo.h
@@ -58,6 +58,9 @@
  */
 class GpuStatsAppInfo : public Parcelable {
 public:
+    // This limits the worst case number of extensions to be tracked.
+    static const uint32_t MAX_NUM_EXTENSIONS = 100;
+
     GpuStatsAppInfo() = default;
     GpuStatsAppInfo(const GpuStatsAppInfo&) = default;
     virtual ~GpuStatsAppInfo() = default;
@@ -74,6 +77,13 @@
     bool falsePrerotation = false;
     bool gles1InUse = false;
     bool angleInUse = false;
+    bool createdGlesContext = false;
+    bool createdVulkanDevice = false;
+    bool createdVulkanSwapchain = false;
+    uint32_t vulkanApiVersion = 0;
+    uint64_t vulkanDeviceFeaturesEnabled = 0;
+    std::vector<int32_t> vulkanInstanceExtensions = {};
+    std::vector<int32_t> vulkanDeviceExtensions = {};
 
     std::chrono::time_point<std::chrono::system_clock> lastAccessTime;
 };
@@ -101,6 +111,13 @@
         CPU_VULKAN_IN_USE = 0,
         FALSE_PREROTATION = 1,
         GLES_1_IN_USE = 2,
+        CREATED_GLES_CONTEXT = 3,
+        CREATED_VULKAN_API_VERSION = 4,
+        CREATED_VULKAN_DEVICE = 5,
+        CREATED_VULKAN_SWAPCHAIN = 6,
+        VULKAN_DEVICE_FEATURES_ENABLED = 7,
+        VULKAN_INSTANCE_EXTENSION = 8,
+        VULKAN_DEVICE_EXTENSION = 9,
     };
 
     GpuStatsInfo() = default;
diff --git a/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h b/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h
index 73d3196..b58a6d9 100644
--- a/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h
+++ b/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h
@@ -71,10 +71,19 @@
                      const std::string& appPackageName, const int32_t vulkanVersion);
     // Set stats for target GpuStatsInfo::Stats type.
     void setTargetStats(const GpuStatsInfo::Stats stats, const uint64_t value = 0);
+    // Set array of stats for target GpuStatsInfo::Stats type.
+    void setTargetStatsArray(const GpuStatsInfo::Stats stats, const uint64_t* values,
+                             const uint32_t valueCount);
     // Set which driver is intended to load.
     void setDriverToLoad(GpuStatsInfo::Driver driver);
     // Set which driver is actually loaded.
     void setDriverLoaded(GpuStatsInfo::Api api, bool isDriverLoaded, int64_t driverLoadingTime);
+    // Set which instance extensions are enabled for the app.
+    void setVulkanInstanceExtensions(uint32_t enabledExtensionCount,
+                                     const char* const* ppEnabledExtensionNames);
+    // Set which device extensions are enabled for the app.
+    void setVulkanDeviceExtensions(uint32_t enabledExtensionCount,
+                                   const char* const* ppEnabledExtensionNames);
 
     /*
      * Api for Vk/GL layer injection.  Presently, drivers enable certain
diff --git a/libs/graphicsenv/include/graphicsenv/IGpuService.h b/libs/graphicsenv/include/graphicsenv/IGpuService.h
index 2d59fa0..b708b0f 100644
--- a/libs/graphicsenv/include/graphicsenv/IGpuService.h
+++ b/libs/graphicsenv/include/graphicsenv/IGpuService.h
@@ -42,6 +42,10 @@
     // set target stats.
     virtual void setTargetStats(const std::string& appPackageName, const uint64_t driverVersionCode,
                                 const GpuStatsInfo::Stats stats, const uint64_t value = 0) = 0;
+    virtual void setTargetStatsArray(const std::string& appPackageName,
+                                     const uint64_t driverVersionCode,
+                                     const GpuStatsInfo::Stats stats, const uint64_t* values,
+                                     const uint32_t valueCount) = 0;
 
     // setter and getter for updatable driver path.
     virtual void setUpdatableDriverPath(const std::string& driverPath) = 0;
diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index a988e39..6c9c28a 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -192,6 +192,7 @@
         "BitTube.cpp",
         "BLASTBufferQueue.cpp",
         "BufferItemConsumer.cpp",
+        "Choreographer.cpp",
         "CompositorTiming.cpp",
         "ConsumerBase.cpp",
         "CpuConsumer.cpp",
@@ -234,6 +235,7 @@
 
     export_header_lib_headers: [
         "libgui_aidl_headers",
+        "jni_headers",
     ],
 
     aidl: {
@@ -241,6 +243,7 @@
     },
 
     header_libs: [
+        "jni_headers",
         "libdvr_headers",
         "libgui_aidl_headers",
         "libpdx_headers",
diff --git a/libs/nativedisplay/Choreographer.cpp b/libs/gui/Choreographer.cpp
similarity index 99%
rename from libs/nativedisplay/Choreographer.cpp
rename to libs/gui/Choreographer.cpp
index 01e9f04..6b25b26 100644
--- a/libs/nativedisplay/Choreographer.cpp
+++ b/libs/gui/Choreographer.cpp
@@ -16,8 +16,8 @@
 
 // #define LOG_NDEBUG 0
 
+#include <gui/Choreographer.h>
 #include <jni.h>
-#include <nativedisplay/Choreographer.h>
 
 #undef LOG_TAG
 #define LOG_TAG "AChoreographer"
diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index a77ca04..a0e75ff 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -42,6 +42,7 @@
 
 namespace android {
 
+using gui::CallbackId;
 using gui::DisplayCaptureArgs;
 using gui::IDisplayEventConnection;
 using gui::IRegionSamplingListener;
diff --git a/libs/gui/ITransactionCompletedListener.cpp b/libs/gui/ITransactionCompletedListener.cpp
index 2b25b61..23d7d50 100644
--- a/libs/gui/ITransactionCompletedListener.cpp
+++ b/libs/gui/ITransactionCompletedListener.cpp
@@ -21,22 +21,11 @@
 #include <optional>
 
 #include <gui/ISurfaceComposer.h>
-#include <gui/ITransactionCompletedListener.h>
 #include <gui/LayerState.h>
+#include <gui/ListenerStats.h>
 #include <private/gui/ParcelUtils.h>
 
-namespace android {
-
-namespace { // Anonymous
-
-enum class Tag : uint32_t {
-    ON_TRANSACTION_COMPLETED = IBinder::FIRST_CALL_TRANSACTION,
-    ON_RELEASE_BUFFER,
-    ON_TRANSACTION_QUEUE_STALLED,
-    LAST = ON_TRANSACTION_QUEUE_STALLED,
-};
-
-} // Anonymous namespace
+namespace android::gui {
 
 status_t FrameEventHistoryStats::writeToParcel(Parcel* output) const {
     status_t err = output->writeUint64(frameNumber);
@@ -274,60 +263,6 @@
     return listenerStats;
 }
 
-class BpTransactionCompletedListener : public SafeBpInterface<ITransactionCompletedListener> {
-public:
-    explicit BpTransactionCompletedListener(const sp<IBinder>& impl)
-          : SafeBpInterface<ITransactionCompletedListener>(impl, "BpTransactionCompletedListener") {
-    }
-
-    ~BpTransactionCompletedListener() override;
-
-    void onTransactionCompleted(ListenerStats stats) override {
-        callRemoteAsync<decltype(&ITransactionCompletedListener::
-                                         onTransactionCompleted)>(Tag::ON_TRANSACTION_COMPLETED,
-                                                                  stats);
-    }
-
-    void onReleaseBuffer(ReleaseCallbackId callbackId, sp<Fence> releaseFence,
-                         uint32_t currentMaxAcquiredBufferCount) override {
-        callRemoteAsync<decltype(&ITransactionCompletedListener::
-                                         onReleaseBuffer)>(Tag::ON_RELEASE_BUFFER, callbackId,
-                                                           releaseFence,
-                                                           currentMaxAcquiredBufferCount);
-    }
-
-    void onTransactionQueueStalled(const String8& reason) override {
-        callRemoteAsync<
-                decltype(&ITransactionCompletedListener::
-                                 onTransactionQueueStalled)>(Tag::ON_TRANSACTION_QUEUE_STALLED,
-                                                             reason);
-    }
-};
-
-// Out-of-line virtual method definitions to trigger vtable emission in this translation unit (see
-// clang warning -Wweak-vtables)
-BpTransactionCompletedListener::~BpTransactionCompletedListener() = default;
-
-IMPLEMENT_META_INTERFACE(TransactionCompletedListener, "android.gui.ITransactionComposerListener");
-
-status_t BnTransactionCompletedListener::onTransact(uint32_t code, const Parcel& data,
-                                                    Parcel* reply, uint32_t flags) {
-    if (code < IBinder::FIRST_CALL_TRANSACTION || code > static_cast<uint32_t>(Tag::LAST)) {
-        return BBinder::onTransact(code, data, reply, flags);
-    }
-    auto tag = static_cast<Tag>(code);
-    switch (tag) {
-        case Tag::ON_TRANSACTION_COMPLETED:
-            return callLocalAsync(data, reply,
-                                  &ITransactionCompletedListener::onTransactionCompleted);
-        case Tag::ON_RELEASE_BUFFER:
-            return callLocalAsync(data, reply, &ITransactionCompletedListener::onReleaseBuffer);
-        case Tag::ON_TRANSACTION_QUEUE_STALLED:
-            return callLocalAsync(data, reply,
-                                  &ITransactionCompletedListener::onTransactionQueueStalled);
-    }
-}
-
 ListenerCallbacks ListenerCallbacks::filter(CallbackId::Type type) const {
     std::vector<CallbackId> filteredCallbackIds;
     for (const auto& callbackId : callbackIds) {
@@ -366,4 +301,4 @@
 
 const ReleaseCallbackId ReleaseCallbackId::INVALID_ID = ReleaseCallbackId(0, 0);
 
-}; // namespace android
+}; // namespace android::gui
diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index 95962af..0d1a69b 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -51,6 +51,7 @@
 
 namespace android {
 
+using gui::CallbackId;
 using gui::FocusRequest;
 using gui::WindowInfoHandle;
 
@@ -388,6 +389,27 @@
     }
 }
 
+void DisplayState::sanitize(int32_t permissions) {
+    if (what & DisplayState::eLayerStackChanged) {
+        if (!(permissions & layer_state_t::Permission::ACCESS_SURFACE_FLINGER)) {
+            what &= ~DisplayState::eLayerStackChanged;
+            ALOGE("Stripped attempt to set eLayerStackChanged in sanitize");
+        }
+    }
+    if (what & DisplayState::eDisplayProjectionChanged) {
+        if (!(permissions & layer_state_t::Permission::ACCESS_SURFACE_FLINGER)) {
+            what &= ~DisplayState::eDisplayProjectionChanged;
+            ALOGE("Stripped attempt to set eDisplayProjectionChanged in sanitize");
+        }
+    }
+    if (what & DisplayState::eSurfaceChanged) {
+        if (!(permissions & layer_state_t::Permission::ACCESS_SURFACE_FLINGER)) {
+            what &= ~DisplayState::eSurfaceChanged;
+            ALOGE("Stripped attempt to set eSurfaceChanged in sanitize");
+        }
+    }
+}
+
 void layer_state_t::sanitize(int32_t permissions) {
     // TODO: b/109894387
     //
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 325c294..a2ed8aa 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -314,7 +314,8 @@
     }
 }
 
-void TransactionCompletedListener::onTransactionCompleted(ListenerStats listenerStats) {
+binder::Status TransactionCompletedListener::onTransactionCompleted(
+        const ListenerStats& listenerStats) {
     std::unordered_map<CallbackId, CallbackTranslation, CallbackIdHash> callbacksMap;
     std::multimap<int32_t, sp<JankDataListener>> jankListenersMap;
     {
@@ -454,9 +455,10 @@
             }
         }
     }
+    return binder::Status::ok();
 }
 
-void TransactionCompletedListener::onTransactionQueueStalled(const String8& reason) {
+binder::Status TransactionCompletedListener::onTransactionQueueStalled(const std::string& reason) {
     std::unordered_map<void*, std::function<void(const std::string&)>> callbackCopy;
     {
         std::scoped_lock<std::mutex> lock(mMutex);
@@ -465,6 +467,7 @@
     for (auto const& it : callbackCopy) {
         it.second(reason.c_str());
     }
+    return binder::Status::ok();
 }
 
 void TransactionCompletedListener::addQueueStallListener(
@@ -478,9 +481,12 @@
     mQueueStallListeners.erase(id);
 }
 
-void TransactionCompletedListener::onReleaseBuffer(ReleaseCallbackId callbackId,
-                                                   sp<Fence> releaseFence,
-                                                   uint32_t currentMaxAcquiredBufferCount) {
+binder::Status TransactionCompletedListener::onReleaseBuffer(
+        const ReleaseCallbackId& callbackId,
+        const std::optional<os::ParcelFileDescriptor>& releaseFenceFd,
+        int32_t currentMaxAcquiredBufferCount) {
+    sp<Fence> releaseFence(releaseFenceFd ? new Fence(::dup(releaseFenceFd->get()))
+                                          : Fence::NO_FENCE);
     ReleaseBufferCallback callback;
     {
         std::scoped_lock<std::mutex> lock(mMutex);
@@ -489,13 +495,14 @@
     if (!callback) {
         ALOGE("Could not call release buffer callback, buffer not found %s",
               callbackId.to_string().c_str());
-        return;
+        return binder::Status::fromExceptionCode(binder::Status::EX_ILLEGAL_ARGUMENT);
     }
     std::optional<uint32_t> optionalMaxAcquiredBufferCount =
-            currentMaxAcquiredBufferCount == UINT_MAX
+            static_cast<uint32_t>(currentMaxAcquiredBufferCount) == UINT_MAX
             ? std::nullopt
             : std::make_optional<uint32_t>(currentMaxAcquiredBufferCount);
     callback(callbackId, releaseFence, optionalMaxAcquiredBufferCount);
+    return binder::Status::ok();
 }
 
 ReleaseBufferCallback TransactionCompletedListener::popReleaseBufferCallbackLocked(
@@ -825,7 +832,11 @@
                 ->mReleaseCallbackThread
                 .addReleaseCallback(state.bufferData->generateReleaseCallbackId(), fence);
     } else {
-        listener->onReleaseBuffer(state.bufferData->generateReleaseCallbackId(), fence, UINT_MAX);
+        std::optional<os::ParcelFileDescriptor> fenceFd;
+        if (fence != Fence::NO_FENCE) {
+            fenceFd = os::ParcelFileDescriptor(base::unique_fd(::dup(fence->get())));
+        }
+        listener->onReleaseBuffer(state.bufferData->generateReleaseCallbackId(), fenceFd, UINT_MAX);
     }
 }
 
@@ -971,14 +982,16 @@
 
 class SyncCallback {
 public:
-    static void function(void* callbackContext, nsecs_t /* latchTime */,
-                         const sp<Fence>& /* presentFence */,
-                         const std::vector<SurfaceControlStats>& /* stats */) {
-        if (!callbackContext) {
-            ALOGE("failed to get callback context for SyncCallback");
-        }
-        SyncCallback* helper = static_cast<SyncCallback*>(callbackContext);
-        LOG_ALWAYS_FATAL_IF(sem_post(&helper->mSemaphore), "sem_post failed");
+    static auto getCallback(std::shared_ptr<SyncCallback>& callbackContext) {
+        return [callbackContext](void* /* unused context */, nsecs_t /* latchTime */,
+                                 const sp<Fence>& /* presentFence */,
+                                 const std::vector<SurfaceControlStats>& /* stats */) {
+            if (!callbackContext) {
+                ALOGE("failed to get callback context for SyncCallback");
+                return;
+            }
+            LOG_ALWAYS_FATAL_IF(sem_post(&callbackContext->mSemaphore), "sem_post failed");
+        };
     }
     ~SyncCallback() {
         if (mInitialized) {
@@ -1013,10 +1026,11 @@
         return mStatus;
     }
 
-    SyncCallback syncCallback;
+    std::shared_ptr<SyncCallback> syncCallback = std::make_shared<SyncCallback>();
     if (synchronous) {
-        syncCallback.init();
-        addTransactionCommittedCallback(syncCallback.function, syncCallback.getContext());
+        syncCallback->init();
+        addTransactionCommittedCallback(SyncCallback::getCallback(syncCallback),
+                                        /*callbackContext=*/nullptr);
     }
 
     bool hasListenerCallbacks = !mListenerCallbacks.empty();
@@ -1092,7 +1106,7 @@
     clear();
 
     if (synchronous) {
-        syncCallback.wait();
+        syncCallback->wait();
     }
 
     mStatus = NO_ERROR;
@@ -2144,6 +2158,12 @@
     mStatus = NO_INIT;
 }
 
+status_t SurfaceComposerClient::bootFinished() {
+    sp<gui::ISurfaceComposer> sf(ComposerServiceAIDL::getComposerService());
+    binder::Status status = sf->bootFinished();
+    return statusTFromBinderStatus(status);
+}
+
 sp<SurfaceControl> SurfaceComposerClient::createSurface(const String8& name, uint32_t w, uint32_t h,
                                                         PixelFormat format, int32_t flags,
                                                         const sp<IBinder>& parentHandle,
@@ -2260,12 +2280,12 @@
     return statusTFromBinderStatus(status);
 }
 
-status_t SurfaceComposerClient::getStaticDisplayInfo(const sp<IBinder>& display,
+status_t SurfaceComposerClient::getStaticDisplayInfo(int64_t displayId,
                                                      ui::StaticDisplayInfo* outInfo) {
     using Tag = android::gui::DeviceProductInfo::ManufactureOrModelDate::Tag;
     gui::StaticDisplayInfo ginfo;
     binder::Status status =
-            ComposerServiceAIDL::getComposerService()->getStaticDisplayInfo(display, &ginfo);
+            ComposerServiceAIDL::getComposerService()->getStaticDisplayInfo(displayId, &ginfo);
     if (status.isOk()) {
         // convert gui::StaticDisplayInfo to ui::StaticDisplayInfo
         outInfo->connectionType = static_cast<ui::DisplayConnectionType>(ginfo.connectionType);
@@ -2309,56 +2329,74 @@
     return statusTFromBinderStatus(status);
 }
 
-status_t SurfaceComposerClient::getDynamicDisplayInfo(const sp<IBinder>& display,
-                                                      ui::DynamicDisplayInfo* outInfo) {
+void SurfaceComposerClient::getDynamicDisplayInfoInternal(gui::DynamicDisplayInfo& ginfo,
+                                                          ui::DynamicDisplayInfo*& outInfo) {
+    // convert gui::DynamicDisplayInfo to ui::DynamicDisplayInfo
+    outInfo->supportedDisplayModes.clear();
+    outInfo->supportedDisplayModes.reserve(ginfo.supportedDisplayModes.size());
+    for (const auto& mode : ginfo.supportedDisplayModes) {
+        ui::DisplayMode outMode;
+        outMode.id = mode.id;
+        outMode.resolution.width = mode.resolution.width;
+        outMode.resolution.height = mode.resolution.height;
+        outMode.xDpi = mode.xDpi;
+        outMode.yDpi = mode.yDpi;
+        outMode.refreshRate = mode.refreshRate;
+        outMode.appVsyncOffset = mode.appVsyncOffset;
+        outMode.sfVsyncOffset = mode.sfVsyncOffset;
+        outMode.presentationDeadline = mode.presentationDeadline;
+        outMode.group = mode.group;
+        std::transform(mode.supportedHdrTypes.begin(), mode.supportedHdrTypes.end(),
+                       std::back_inserter(outMode.supportedHdrTypes),
+                       [](const int32_t& value) { return static_cast<ui::Hdr>(value); });
+        outInfo->supportedDisplayModes.push_back(outMode);
+    }
+
+    outInfo->activeDisplayModeId = ginfo.activeDisplayModeId;
+    outInfo->renderFrameRate = ginfo.renderFrameRate;
+
+    outInfo->supportedColorModes.clear();
+    outInfo->supportedColorModes.reserve(ginfo.supportedColorModes.size());
+    for (const auto& cmode : ginfo.supportedColorModes) {
+        outInfo->supportedColorModes.push_back(static_cast<ui::ColorMode>(cmode));
+    }
+
+    outInfo->activeColorMode = static_cast<ui::ColorMode>(ginfo.activeColorMode);
+
+    std::vector<ui::Hdr> types;
+    types.reserve(ginfo.hdrCapabilities.supportedHdrTypes.size());
+    for (const auto& hdr : ginfo.hdrCapabilities.supportedHdrTypes) {
+        types.push_back(static_cast<ui::Hdr>(hdr));
+    }
+    outInfo->hdrCapabilities = HdrCapabilities(types, ginfo.hdrCapabilities.maxLuminance,
+                                               ginfo.hdrCapabilities.maxAverageLuminance,
+                                               ginfo.hdrCapabilities.minLuminance);
+
+    outInfo->autoLowLatencyModeSupported = ginfo.autoLowLatencyModeSupported;
+    outInfo->gameContentTypeSupported = ginfo.gameContentTypeSupported;
+    outInfo->preferredBootDisplayMode = ginfo.preferredBootDisplayMode;
+}
+
+status_t SurfaceComposerClient::getDynamicDisplayInfoFromId(int64_t displayId,
+                                                            ui::DynamicDisplayInfo* outInfo) {
     gui::DynamicDisplayInfo ginfo;
     binder::Status status =
-            ComposerServiceAIDL::getComposerService()->getDynamicDisplayInfo(display, &ginfo);
+            ComposerServiceAIDL::getComposerService()->getDynamicDisplayInfoFromId(displayId,
+                                                                                   &ginfo);
     if (status.isOk()) {
-        // convert gui::DynamicDisplayInfo to ui::DynamicDisplayInfo
-        outInfo->supportedDisplayModes.clear();
-        outInfo->supportedDisplayModes.reserve(ginfo.supportedDisplayModes.size());
-        for (const auto& mode : ginfo.supportedDisplayModes) {
-            ui::DisplayMode outMode;
-            outMode.id = mode.id;
-            outMode.resolution.width = mode.resolution.width;
-            outMode.resolution.height = mode.resolution.height;
-            outMode.xDpi = mode.xDpi;
-            outMode.yDpi = mode.yDpi;
-            outMode.refreshRate = mode.refreshRate;
-            outMode.appVsyncOffset = mode.appVsyncOffset;
-            outMode.sfVsyncOffset = mode.sfVsyncOffset;
-            outMode.presentationDeadline = mode.presentationDeadline;
-            outMode.group = mode.group;
-            std::transform(mode.supportedHdrTypes.begin(), mode.supportedHdrTypes.end(),
-                           std::back_inserter(outMode.supportedHdrTypes),
-                           [](const int32_t& value) { return static_cast<ui::Hdr>(value); });
-            outInfo->supportedDisplayModes.push_back(outMode);
-        }
+        getDynamicDisplayInfoInternal(ginfo, outInfo);
+    }
+    return statusTFromBinderStatus(status);
+}
 
-        outInfo->activeDisplayModeId = ginfo.activeDisplayModeId;
-        outInfo->renderFrameRate = ginfo.renderFrameRate;
-
-        outInfo->supportedColorModes.clear();
-        outInfo->supportedColorModes.reserve(ginfo.supportedColorModes.size());
-        for (const auto& cmode : ginfo.supportedColorModes) {
-            outInfo->supportedColorModes.push_back(static_cast<ui::ColorMode>(cmode));
-        }
-
-        outInfo->activeColorMode = static_cast<ui::ColorMode>(ginfo.activeColorMode);
-
-        std::vector<ui::Hdr> types;
-        types.reserve(ginfo.hdrCapabilities.supportedHdrTypes.size());
-        for (const auto& hdr : ginfo.hdrCapabilities.supportedHdrTypes) {
-            types.push_back(static_cast<ui::Hdr>(hdr));
-        }
-        outInfo->hdrCapabilities = HdrCapabilities(types, ginfo.hdrCapabilities.maxLuminance,
-                                                   ginfo.hdrCapabilities.maxAverageLuminance,
-                                                   ginfo.hdrCapabilities.minLuminance);
-
-        outInfo->autoLowLatencyModeSupported = ginfo.autoLowLatencyModeSupported;
-        outInfo->gameContentTypeSupported = ginfo.gameContentTypeSupported;
-        outInfo->preferredBootDisplayMode = ginfo.preferredBootDisplayMode;
+status_t SurfaceComposerClient::getDynamicDisplayInfoFromToken(const sp<IBinder>& display,
+                                                               ui::DynamicDisplayInfo* outInfo) {
+    gui::DynamicDisplayInfo ginfo;
+    binder::Status status =
+            ComposerServiceAIDL::getComposerService()->getDynamicDisplayInfoFromToken(display,
+                                                                                      &ginfo);
+    if (status.isOk()) {
+        getDynamicDisplayInfoInternal(ginfo, outInfo);
     }
     return statusTFromBinderStatus(status);
 }
@@ -2366,7 +2404,8 @@
 status_t SurfaceComposerClient::getActiveDisplayMode(const sp<IBinder>& display,
                                                      ui::DisplayMode* mode) {
     ui::DynamicDisplayInfo info;
-    status_t result = getDynamicDisplayInfo(display, &info);
+
+    status_t result = getDynamicDisplayInfoFromToken(display, &info);
     if (result != NO_ERROR) {
         return result;
     }
@@ -2542,7 +2581,7 @@
     gui::PullAtomData pad;
     binder::Status status = ComposerServiceAIDL::getComposerService()->onPullAtom(atomId, &pad);
     if (status.isOk()) {
-        outData->assign((const char*)pad.data.data(), pad.data.size());
+        outData->assign(pad.data.begin(), pad.data.end());
         *success = pad.success;
     }
     return statusTFromBinderStatus(status);
@@ -2827,7 +2866,11 @@
 
         while (!callbackInfos.empty()) {
             auto [callbackId, releaseFence] = callbackInfos.front();
-            listener->onReleaseBuffer(callbackId, std::move(releaseFence), UINT_MAX);
+            std::optional<os::ParcelFileDescriptor> fenceFd;
+            if (releaseFence != Fence::NO_FENCE) {
+                fenceFd = os::ParcelFileDescriptor(base::unique_fd(::dup(releaseFence->get())));
+            }
+            listener->onReleaseBuffer(callbackId, fenceFd, UINT_MAX);
             callbackInfos.pop();
         }
 
diff --git a/libs/gui/TEST_MAPPING b/libs/gui/TEST_MAPPING
index 1c43530..9415035 100644
--- a/libs/gui/TEST_MAPPING
+++ b/libs/gui/TEST_MAPPING
@@ -3,5 +3,11 @@
     {
       "path": "frameworks/native/libs/nativewindow"
     }
+  ],
+  "postsubmit": [
+    {
+      // TODO(257123981): move this to presubmit after dealing with existing breakages.
+      "name": "libgui_test"
+    }
   ]
 }
diff --git a/libs/gui/aidl/android/gui/ISurfaceComposer.aidl b/libs/gui/aidl/android/gui/ISurfaceComposer.aidl
index 40410fb..a0b613c 100644
--- a/libs/gui/aidl/android/gui/ISurfaceComposer.aidl
+++ b/libs/gui/aidl/android/gui/ISurfaceComposer.aidl
@@ -62,8 +62,6 @@
      * Signal that we're done booting.
      * Requires ACCESS_SURFACE_FLINGER permission
      */
-    // Note this must be the 1st method, so IBinder::FIRST_CALL_TRANSACTION
-    // is assigned, as it is called from Java by ActivityManagerService.
     void bootFinished();
 
     /**
@@ -126,12 +124,14 @@
     /**
      * Gets immutable information about given physical display.
      */
-    StaticDisplayInfo getStaticDisplayInfo(IBinder display);
+    StaticDisplayInfo getStaticDisplayInfo(long displayId);
 
     /**
      * Gets dynamic information about given physical display.
      */
-    DynamicDisplayInfo getDynamicDisplayInfo(IBinder display);
+    DynamicDisplayInfo getDynamicDisplayInfoFromId(long displayId);
+
+    DynamicDisplayInfo getDynamicDisplayInfoFromToken(IBinder display);
 
     DisplayPrimaries getDisplayNativePrimaries(IBinder display);
 
diff --git a/libs/gui/aidl/android/gui/ITransactionCompletedListener.aidl b/libs/gui/aidl/android/gui/ITransactionCompletedListener.aidl
new file mode 100644
index 0000000..dde4d38
--- /dev/null
+++ b/libs/gui/aidl/android/gui/ITransactionCompletedListener.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.gui;
+
+import android.gui.ListenerStats;
+import android.gui.ReleaseCallbackId;
+
+/** @hide */
+oneway interface ITransactionCompletedListener {
+   void onTransactionCompleted(in ListenerStats stats);
+
+   void onReleaseBuffer(in ReleaseCallbackId callbackId,
+                        in @nullable ParcelFileDescriptor releaseFenceFd,
+                        int currentMaxAcquiredBufferCount);
+
+   void onTransactionQueueStalled(@utf8InCpp String name);
+}
diff --git a/libs/gui/aidl/android/gui/ListenerStats.aidl b/libs/gui/aidl/android/gui/ListenerStats.aidl
new file mode 100644
index 0000000..63248b2
--- /dev/null
+++ b/libs/gui/aidl/android/gui/ListenerStats.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.gui;
+
+parcelable ListenerStats cpp_header "gui/ListenerStats.h";
diff --git a/libs/gui/aidl/android/gui/PullAtomData.aidl b/libs/gui/aidl/android/gui/PullAtomData.aidl
index 14d33c6..c307cef 100644
--- a/libs/gui/aidl/android/gui/PullAtomData.aidl
+++ b/libs/gui/aidl/android/gui/PullAtomData.aidl
@@ -18,6 +18,6 @@
 
 /** @hide */
 parcelable PullAtomData {
-    @utf8InCpp String data;
+    byte[] data;
     boolean success;
 }
diff --git a/libs/gui/aidl/android/gui/ReleaseCallbackId.aidl b/libs/gui/aidl/android/gui/ReleaseCallbackId.aidl
new file mode 100644
index 0000000..c86de34
--- /dev/null
+++ b/libs/gui/aidl/android/gui/ReleaseCallbackId.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.gui;
+
+parcelable ReleaseCallbackId cpp_header "gui/ReleaseCallbackId.h";
diff --git a/libs/gui/fuzzer/libgui_fuzzer_utils.h b/libs/gui/fuzzer/libgui_fuzzer_utils.h
index 9d1ee8f..8810e4e 100644
--- a/libs/gui/fuzzer/libgui_fuzzer_utils.h
+++ b/libs/gui/fuzzer/libgui_fuzzer_utils.h
@@ -79,9 +79,11 @@
                 (override));
     MOCK_METHOD(binder::Status, getDisplayState, (const sp<IBinder>&, gui::DisplayState*),
                 (override));
-    MOCK_METHOD(binder::Status, getStaticDisplayInfo, (const sp<IBinder>&, gui::StaticDisplayInfo*),
+    MOCK_METHOD(binder::Status, getStaticDisplayInfo, (int64_t, gui::StaticDisplayInfo*),
                 (override));
-    MOCK_METHOD(binder::Status, getDynamicDisplayInfo,
+    MOCK_METHOD(binder::Status, getDynamicDisplayInfoFromId, (int64_t, gui::DynamicDisplayInfo*),
+                (override));
+    MOCK_METHOD(binder::Status, getDynamicDisplayInfoFromToken,
                 (const sp<IBinder>&, gui::DynamicDisplayInfo*), (override));
     MOCK_METHOD(binder::Status, getDisplayNativePrimaries,
                 (const sp<IBinder>&, gui::DisplayPrimaries*), (override));
diff --git a/libs/nativedisplay/include/nativedisplay/Choreographer.h b/libs/gui/include/gui/Choreographer.h
similarity index 98%
rename from libs/nativedisplay/include/nativedisplay/Choreographer.h
rename to libs/gui/include/gui/Choreographer.h
index bb63f29..89a7058 100644
--- a/libs/nativedisplay/include/nativedisplay/Choreographer.h
+++ b/libs/gui/include/gui/Choreographer.h
@@ -16,8 +16,9 @@
 
 #pragma once
 
+#include <android/choreographer.h>
 #include <gui/DisplayEventDispatcher.h>
-#include <private/android/choreographer.h>
+#include <jni.h>
 #include <utils/Looper.h>
 
 #include <mutex>
diff --git a/libs/gui/include/gui/ISurfaceComposer.h b/libs/gui/include/gui/ISurfaceComposer.h
index d517e99..06a246e 100644
--- a/libs/gui/include/gui/ISurfaceComposer.h
+++ b/libs/gui/include/gui/ISurfaceComposer.h
@@ -23,11 +23,11 @@
 #include <android/gui/IHdrLayerInfoListener.h>
 #include <android/gui/IRegionSamplingListener.h>
 #include <android/gui/IScreenCaptureListener.h>
+#include <android/gui/ITransactionCompletedListener.h>
 #include <android/gui/ITunnelModeEnabledListener.h>
 #include <android/gui/IWindowInfosListener.h>
 #include <binder/IBinder.h>
 #include <binder/IInterface.h>
-#include <gui/ITransactionCompletedListener.h>
 #include <gui/SpHash.h>
 #include <math/vec4.h>
 #include <stdint.h>
@@ -66,6 +66,7 @@
 using gui::IDisplayEventConnection;
 using gui::IRegionSamplingListener;
 using gui::IScreenCaptureListener;
+using gui::ListenerCallbacks;
 using gui::SpHash;
 
 namespace gui {
@@ -102,7 +103,7 @@
         // (sf vsync offset - debug.sf.early_phase_offset_ns). SurfaceFlinger will continue to be
         // in the early configuration until it receives eEarlyWakeupEnd. These flags are
         // expected to be used by WindowManager only and are guarded by
-        // android.permission.ACCESS_SURFACE_FLINGER
+        // android.permission.WAKEUP_SURFACE_FLINGER
         eEarlyWakeupStart = 0x08,
         eEarlyWakeupEnd = 0x10,
         eOneWay = 0x20
diff --git a/libs/gui/include/gui/LayerState.h b/libs/gui/include/gui/LayerState.h
index 6ec6bd7..c5fdf82 100644
--- a/libs/gui/include/gui/LayerState.h
+++ b/libs/gui/include/gui/LayerState.h
@@ -21,10 +21,10 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+#include <android/gui/ITransactionCompletedListener.h>
 #include <android/gui/IWindowInfosReportedListener.h>
 #include <android/native_window.h>
 #include <gui/IGraphicBufferProducer.h>
-#include <gui/ITransactionCompletedListener.h>
 #include <math/mat4.h>
 
 #include <android/gui/DropInputMode.h>
@@ -35,6 +35,7 @@
 #include <gui/ISurfaceComposer.h>
 #include <gui/LayerCaptureArgs.h>
 #include <gui/LayerMetadata.h>
+#include <gui/ReleaseCallbackId.h>
 #include <gui/SpHash.h>
 #include <gui/SurfaceControl.h>
 #include <gui/WindowInfo.h>
@@ -56,6 +57,9 @@
 using gui::ISurfaceComposerClient;
 using gui::LayerMetadata;
 
+using gui::ITransactionCompletedListener;
+using gui::ReleaseCallbackId;
+
 struct client_cache_t {
     wp<IBinder> token = nullptr;
     uint64_t id;
@@ -359,6 +363,7 @@
 
     DisplayState();
     void merge(const DisplayState& other);
+    void sanitize(int32_t permissions);
 
     uint32_t what = 0;
     uint32_t flags = 0;
diff --git a/libs/gui/include/gui/ITransactionCompletedListener.h b/libs/gui/include/gui/ListenerStats.h
similarity index 81%
rename from libs/gui/include/gui/ITransactionCompletedListener.h
rename to libs/gui/include/gui/ListenerStats.h
index 453e8f3..3a12802 100644
--- a/libs/gui/include/gui/ITransactionCompletedListener.h
+++ b/libs/gui/include/gui/ListenerStats.h
@@ -24,6 +24,8 @@
 #include <binder/SafeInterface.h>
 
 #include <gui/FrameTimestamps.h>
+#include <gui/ReleaseCallbackId.h>
+
 #include <ui/Fence.h>
 #include <utils/Timers.h>
 
@@ -32,10 +34,7 @@
 #include <unordered_set>
 #include <variant>
 
-namespace android {
-
-class ITransactionCompletedListener;
-class ListenerCallbacks;
+namespace android::gui {
 
 class CallbackId : public Parcelable {
 public:
@@ -54,30 +53,6 @@
     std::size_t operator()(const CallbackId& key) const { return std::hash<int64_t>()(key.id); }
 };
 
-class ReleaseCallbackId : public Parcelable {
-public:
-    static const ReleaseCallbackId INVALID_ID;
-
-    uint64_t bufferId;
-    uint64_t framenumber;
-    ReleaseCallbackId() {}
-    ReleaseCallbackId(uint64_t bufferId, uint64_t framenumber)
-          : bufferId(bufferId), framenumber(framenumber) {}
-    status_t writeToParcel(Parcel* output) const override;
-    status_t readFromParcel(const Parcel* input) override;
-
-    bool operator==(const ReleaseCallbackId& rhs) const {
-        return bufferId == rhs.bufferId && framenumber == rhs.framenumber;
-    }
-    bool operator!=(const ReleaseCallbackId& rhs) const { return !operator==(rhs); }
-    std::string to_string() const {
-        if (*this == INVALID_ID) return "INVALID_ID";
-
-        return "bufferId:" + std::to_string(bufferId) +
-                " framenumber:" + std::to_string(framenumber);
-    }
-};
-
 struct ReleaseBufferCallbackIdHash {
     std::size_t operator()(const ReleaseCallbackId& key) const {
         return std::hash<uint64_t>()(key.bufferId);
@@ -186,27 +161,6 @@
     std::vector<TransactionStats> transactionStats;
 };
 
-class ITransactionCompletedListener : public IInterface {
-public:
-    DECLARE_META_INTERFACE(TransactionCompletedListener)
-
-    virtual void onTransactionCompleted(ListenerStats stats) = 0;
-
-    virtual void onReleaseBuffer(ReleaseCallbackId callbackId, sp<Fence> releaseFence,
-                                 uint32_t currentMaxAcquiredBufferCount) = 0;
-
-    virtual void onTransactionQueueStalled(const String8& name) = 0;
-};
-
-class BnTransactionCompletedListener : public SafeBnInterface<ITransactionCompletedListener> {
-public:
-    BnTransactionCompletedListener()
-          : SafeBnInterface<ITransactionCompletedListener>("BnTransactionCompletedListener") {}
-
-    status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply,
-                        uint32_t flags = 0) override;
-};
-
 class ListenerCallbacks {
 public:
     ListenerCallbacks(const sp<IBinder>& listener,
@@ -268,4 +222,4 @@
     }
 };
 
-} // namespace android
+} // namespace android::gui
diff --git a/libs/gui/include/gui/ReleaseCallbackId.h b/libs/gui/include/gui/ReleaseCallbackId.h
new file mode 100644
index 0000000..142ee5a
--- /dev/null
+++ b/libs/gui/include/gui/ReleaseCallbackId.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <binder/Parcel.h>
+#include <binder/Parcelable.h>
+
+#include <cstdint>
+
+namespace android::gui {
+
+class ReleaseCallbackId : public Parcelable {
+public:
+    static const ReleaseCallbackId INVALID_ID;
+
+    uint64_t bufferId;
+    uint64_t framenumber;
+    ReleaseCallbackId() {}
+    ReleaseCallbackId(uint64_t bufferId, uint64_t framenumber)
+          : bufferId(bufferId), framenumber(framenumber) {}
+    status_t writeToParcel(Parcel* output) const override;
+    status_t readFromParcel(const Parcel* input) override;
+
+    bool operator==(const ReleaseCallbackId& rhs) const {
+        return bufferId == rhs.bufferId && framenumber == rhs.framenumber;
+    }
+    bool operator!=(const ReleaseCallbackId& rhs) const { return !operator==(rhs); }
+    std::string to_string() const {
+        if (*this == INVALID_ID) return "INVALID_ID";
+
+        return "bufferId:" + std::to_string(bufferId) +
+                " framenumber:" + std::to_string(framenumber);
+    }
+};
+
+} // namespace android::gui
diff --git a/libs/gui/include/gui/SurfaceComposerClient.h b/libs/gui/include/gui/SurfaceComposerClient.h
index 2038f14..cc459c5 100644
--- a/libs/gui/include/gui/SurfaceComposerClient.h
+++ b/libs/gui/include/gui/SurfaceComposerClient.h
@@ -42,10 +42,13 @@
 
 #include <android/gui/ISurfaceComposerClient.h>
 
+#include <android/gui/BnTransactionCompletedListener.h>
+
 #include <gui/CpuConsumer.h>
 #include <gui/ISurfaceComposer.h>
-#include <gui/ITransactionCompletedListener.h>
 #include <gui/LayerState.h>
+#include <gui/ListenerStats.h>
+#include <gui/ReleaseCallbackId.h>
 #include <gui/SurfaceControl.h>
 #include <gui/WindowInfosListenerReporter.h>
 #include <math/vec3.h>
@@ -59,11 +62,21 @@
 class ITunnelModeEnabledListener;
 class Region;
 
+using gui::BnTransactionCompletedListener;
+using gui::CallbackId;
+using gui::CallbackIdHash;
 using gui::DisplayCaptureArgs;
+using gui::FrameEventHistoryStats;
 using gui::IRegionSamplingListener;
 using gui::ISurfaceComposerClient;
+using gui::ITransactionCompletedListener;
+using gui::JankData;
 using gui::LayerCaptureArgs;
 using gui::LayerMetadata;
+using gui::ListenerStats;
+using gui::ReleaseBufferCallbackIdHash;
+using gui::ReleaseCallbackId;
+using gui::SurfaceStats;
 
 struct SurfaceControlStats {
     SurfaceControlStats(const sp<SurfaceControl>& sc, nsecs_t latchTime,
@@ -145,14 +158,17 @@
     status_t linkToComposerDeath(const sp<IBinder::DeathRecipient>& recipient,
             void* cookie = nullptr, uint32_t flags = 0);
 
+    // Notify the SurfaceComposerClient that the boot procedure has completed
+    static status_t bootFinished();
+
     // Get transactional state of given display.
     static status_t getDisplayState(const sp<IBinder>& display, ui::DisplayState*);
 
     // Get immutable information about given physical display.
-    static status_t getStaticDisplayInfo(const sp<IBinder>& display, ui::StaticDisplayInfo*);
+    static status_t getStaticDisplayInfo(int64_t, ui::StaticDisplayInfo*);
 
-    // Get dynamic information about given physical display.
-    static status_t getDynamicDisplayInfo(const sp<IBinder>& display, ui::DynamicDisplayInfo*);
+    // Get dynamic information about given physical display from display id
+    static status_t getDynamicDisplayInfoFromId(int64_t, ui::DynamicDisplayInfo*);
 
     // Shorthand for the active display mode from getDynamicDisplayInfo().
     // TODO(b/180391891): Update clients to use getDynamicDisplayInfo and remove this function.
@@ -714,6 +730,12 @@
     ReleaseCallbackThread mReleaseCallbackThread;
 
 private:
+    // Get dynamic information about given physical display from token
+    static status_t getDynamicDisplayInfoFromToken(const sp<IBinder>& display,
+                                                   ui::DynamicDisplayInfo*);
+
+    static void getDynamicDisplayInfoInternal(gui::DynamicDisplayInfo& ginfo,
+                                              ui::DynamicDisplayInfo*& outInfo);
     virtual void onFirstRef();
 
     mutable     Mutex                       mLock;
@@ -819,17 +841,17 @@
     void setReleaseBufferCallback(const ReleaseCallbackId&, ReleaseBufferCallback);
 
     // BnTransactionCompletedListener overrides
-    void onTransactionCompleted(ListenerStats stats) override;
-    void onReleaseBuffer(ReleaseCallbackId, sp<Fence> releaseFence,
-                         uint32_t currentMaxAcquiredBufferCount) override;
+    binder::Status onTransactionCompleted(const ListenerStats& stats) override;
+    binder::Status onReleaseBuffer(const ReleaseCallbackId& callbackId,
+                                   const std::optional<os::ParcelFileDescriptor>& releaseFenceFd,
+                                   int32_t currentMaxAcquiredBufferCount) override;
+    binder::Status onTransactionQueueStalled(const std::string& reason) override;
 
     void removeReleaseBufferCallback(const ReleaseCallbackId& callbackId);
 
     // For Testing Only
     static void setInstance(const sp<TransactionCompletedListener>&);
 
-    void onTransactionQueueStalled(const String8& reason) override;
-
 private:
     ReleaseBufferCallback popReleaseBufferCallbackLocked(const ReleaseCallbackId&);
     static sp<TransactionCompletedListener> sInstance;
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index 6d3b425..55242df 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -782,13 +782,18 @@
         return binder::Status::ok();
     }
 
-    binder::Status getStaticDisplayInfo(const sp<IBinder>& /*display*/,
+    binder::Status getStaticDisplayInfo(int64_t /*displayId*/,
                                         gui::StaticDisplayInfo* /*outInfo*/) override {
         return binder::Status::ok();
     }
 
-    binder::Status getDynamicDisplayInfo(const sp<IBinder>& /*display*/,
-                                         gui::DynamicDisplayInfo* /*outInfo*/) override {
+    binder::Status getDynamicDisplayInfoFromId(int64_t /*displayId*/,
+                                               gui::DynamicDisplayInfo* /*outInfo*/) override {
+        return binder::Status::ok();
+    }
+
+    binder::Status getDynamicDisplayInfoFromToken(const sp<IBinder>& /*display*/,
+                                                  gui::DynamicDisplayInfo* /*outInfo*/) override {
         return binder::Status::ok();
     }
 
diff --git a/libs/input/Android.bp b/libs/input/Android.bp
index 34ef7b4..8ddd18d 100644
--- a/libs/input/Android.bp
+++ b/libs/input/Android.bp
@@ -50,6 +50,7 @@
         "Keyboard.cpp",
         "KeyCharacterMap.cpp",
         "KeyLayoutMap.cpp",
+        "MotionPredictor.cpp",
         "PrintTools.cpp",
         "PropertyMap.cpp",
         "TouchVideoFrame.cpp",
@@ -63,8 +64,9 @@
 
     shared_libs: [
         "libbase",
-        "liblog",
         "libcutils",
+        "liblog",
+        "libPlatformProperties",
         "libvintf",
     ],
 
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 9e8ebf3..d893cb9 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -46,25 +46,6 @@
 
 namespace {
 
-float transformAngle(const ui::Transform& transform, float angleRadians) {
-    // Construct and transform a vector oriented at the specified clockwise angle from vertical.
-    // Coordinate system: down is increasing Y, right is increasing X.
-    float x = sinf(angleRadians);
-    float y = -cosf(angleRadians);
-    vec2 transformedPoint = transform.transform(x, y);
-
-    // Determine how the origin is transformed by the matrix so that we
-    // can transform orientation vectors.
-    const vec2 origin = transform.transform(0, 0);
-
-    transformedPoint.x -= origin.x;
-    transformedPoint.y -= origin.y;
-
-    // Derive the transformed vector's clockwise angle from vertical.
-    // The return value of atan2f is in range [-pi, pi] which conforms to the orientation API.
-    return atan2f(transformedPoint.x, -transformedPoint.y);
-}
-
 bool shouldDisregardTransformation(uint32_t source) {
     // Do not apply any transformations to axes from joysticks, touchpads, or relative mice.
     return isFromSource(source, AINPUT_SOURCE_CLASS_JOYSTICK) ||
@@ -172,6 +153,25 @@
     return transformedXy - transformedOrigin;
 }
 
+float transformAngle(const ui::Transform& transform, float angleRadians) {
+    // Construct and transform a vector oriented at the specified clockwise angle from vertical.
+    // Coordinate system: down is increasing Y, right is increasing X.
+    float x = sinf(angleRadians);
+    float y = -cosf(angleRadians);
+    vec2 transformedPoint = transform.transform(x, y);
+
+    // Determine how the origin is transformed by the matrix so that we
+    // can transform orientation vectors.
+    const vec2 origin = transform.transform(0, 0);
+
+    transformedPoint.x -= origin.x;
+    transformedPoint.y -= origin.y;
+
+    // Derive the transformed vector's clockwise angle from vertical.
+    // The return value of atan2f is in range [-pi, pi] which conforms to the orientation API.
+    return atan2f(transformedPoint.x, -transformedPoint.y);
+}
+
 const char* inputEventTypeToString(int32_t type) {
     switch (type) {
         case AINPUT_EVENT_TYPE_KEY: {
diff --git a/libs/input/InputDevice.cpp b/libs/input/InputDevice.cpp
index 4751a7d..fb6c590 100644
--- a/libs/input/InputDevice.cpp
+++ b/libs/input/InputDevice.cpp
@@ -179,6 +179,7 @@
         mIsExternal(other.mIsExternal),
         mHasMic(other.mHasMic),
         mCountryCode(other.mCountryCode),
+        mKeyboardLayoutInfo(other.mKeyboardLayoutInfo),
         mSources(other.mSources),
         mKeyboardType(other.mKeyboardType),
         mKeyCharacterMap(other.mKeyCharacterMap),
@@ -270,6 +271,10 @@
     mKeyboardType = std::max(mKeyboardType, keyboardType);
 }
 
+void InputDeviceInfo::setKeyboardLayoutInfo(KeyboardLayoutInfo layoutInfo) {
+    mKeyboardLayoutInfo = std::move(layoutInfo);
+}
+
 std::vector<InputDeviceSensorInfo> InputDeviceInfo::getSensors() {
     std::vector<InputDeviceSensorInfo> infos;
     infos.reserve(mSensors.size());
diff --git a/libs/input/InputEventLabels.cpp b/libs/input/InputEventLabels.cpp
index b78fae3..dd7cbb5 100644
--- a/libs/input/InputEventLabels.cpp
+++ b/libs/input/InputEventLabels.cpp
@@ -339,7 +339,8 @@
     DEFINE_KEYCODE(STYLUS_BUTTON_PRIMARY), \
     DEFINE_KEYCODE(STYLUS_BUTTON_SECONDARY), \
     DEFINE_KEYCODE(STYLUS_BUTTON_TERTIARY), \
-    DEFINE_KEYCODE(STYLUS_BUTTON_TAIL)
+    DEFINE_KEYCODE(STYLUS_BUTTON_TAIL), \
+    DEFINE_KEYCODE(RECENT_APPS)
 
 // NOTE: If you add a new axis here you must also add it to several other files.
 //       Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list.
diff --git a/libs/input/KeyCharacterMap.cpp b/libs/input/KeyCharacterMap.cpp
index 422e6e0..fa5c41f 100644
--- a/libs/input/KeyCharacterMap.cpp
+++ b/libs/input/KeyCharacterMap.cpp
@@ -43,7 +43,6 @@
 // Enables debug output for mapping.
 #define DEBUG_MAPPING 0
 
-
 namespace android {
 
 static const char* WHITESPACE = " \t\r";
@@ -93,6 +92,7 @@
       : mType(other.mType),
         mLoadFileName(other.mLoadFileName),
         mLayoutOverlayApplied(other.mLayoutOverlayApplied),
+        mKeyRemapping(other.mKeyRemapping),
         mKeysByScanCode(other.mKeysByScanCode),
         mKeysByUsageCode(other.mKeysByUsageCode) {
     for (size_t i = 0; i < other.mKeys.size(); i++) {
@@ -114,7 +114,7 @@
     if (mLayoutOverlayApplied != other.mLayoutOverlayApplied) {
         return false;
     }
-    if (mKeys.size() != other.mKeys.size() ||
+    if (mKeys.size() != other.mKeys.size() || mKeyRemapping.size() != other.mKeyRemapping.size() ||
         mKeysByScanCode.size() != other.mKeysByScanCode.size() ||
         mKeysByUsageCode.size() != other.mKeysByUsageCode.size()) {
         return false;
@@ -131,22 +131,9 @@
         }
     }
 
-    for (size_t i = 0; i < mKeysByScanCode.size(); i++) {
-        if (mKeysByScanCode.keyAt(i) != other.mKeysByScanCode.keyAt(i)) {
-            return false;
-        }
-        if (mKeysByScanCode.valueAt(i) != other.mKeysByScanCode.valueAt(i)) {
-            return false;
-        }
-    }
-
-    for (size_t i = 0; i < mKeysByUsageCode.size(); i++) {
-        if (mKeysByUsageCode.keyAt(i) != other.mKeysByUsageCode.keyAt(i)) {
-            return false;
-        }
-        if (mKeysByUsageCode.valueAt(i) != other.mKeysByUsageCode.valueAt(i)) {
-            return false;
-        }
+    if (mKeyRemapping != other.mKeyRemapping || mKeysByScanCode != other.mKeysByScanCode ||
+        mKeysByUsageCode != other.mKeysByUsageCode) {
+        return false;
     }
 
     return true;
@@ -258,14 +245,12 @@
         }
     }
 
-    for (size_t i = 0; i < overlay.mKeysByScanCode.size(); i++) {
-        mKeysByScanCode.replaceValueFor(overlay.mKeysByScanCode.keyAt(i),
-                                        overlay.mKeysByScanCode.valueAt(i));
+    for (auto const& it : overlay.mKeysByScanCode) {
+        mKeysByScanCode.insert_or_assign(it.first, it.second);
     }
 
-    for (size_t i = 0; i < overlay.mKeysByUsageCode.size(); i++) {
-        mKeysByUsageCode.replaceValueFor(overlay.mKeysByUsageCode.keyAt(i),
-                                         overlay.mKeysByUsageCode.valueAt(i));
+    for (auto const& it : overlay.mKeysByUsageCode) {
+        mKeysByUsageCode.insert_or_assign(it.first, it.second);
     }
     mLayoutOverlayApplied = true;
 }
@@ -400,11 +385,26 @@
     return true;
 }
 
+void KeyCharacterMap::addKeyRemapping(int32_t fromKeyCode, int32_t toKeyCode) {
+    if (fromKeyCode == toKeyCode) {
+        mKeyRemapping.erase(fromKeyCode);
+#if DEBUG_MAPPING
+        ALOGD("addKeyRemapping: Cleared remapping forKeyCode=%d ~ Result Successful.", fromKeyCode);
+#endif
+        return;
+    }
+    mKeyRemapping.insert_or_assign(fromKeyCode, toKeyCode);
+#if DEBUG_MAPPING
+    ALOGD("addKeyRemapping: fromKeyCode=%d, toKeyCode=%d ~ Result Successful.", fromKeyCode,
+          toKeyCode);
+#endif
+}
+
 status_t KeyCharacterMap::mapKey(int32_t scanCode, int32_t usageCode, int32_t* outKeyCode) const {
     if (usageCode) {
-        ssize_t index = mKeysByUsageCode.indexOfKey(usageCode);
-        if (index >= 0) {
-            *outKeyCode = mKeysByUsageCode.valueAt(index);
+        const auto it = mKeysByUsageCode.find(usageCode);
+        if (it != mKeysByUsageCode.end()) {
+            *outKeyCode = it->second;
 #if DEBUG_MAPPING
             ALOGD("mapKey: scanCode=%d, usageCode=0x%08x ~ Result keyCode=%d.",
                     scanCode, usageCode, *outKeyCode);
@@ -413,9 +413,9 @@
         }
     }
     if (scanCode) {
-        ssize_t index = mKeysByScanCode.indexOfKey(scanCode);
-        if (index >= 0) {
-            *outKeyCode = mKeysByScanCode.valueAt(index);
+        const auto it = mKeysByScanCode.find(scanCode);
+        if (it != mKeysByScanCode.end()) {
+            *outKeyCode = it->second;
 #if DEBUG_MAPPING
             ALOGD("mapKey: scanCode=%d, usageCode=0x%08x ~ Result keyCode=%d.",
                     scanCode, usageCode, *outKeyCode);
@@ -431,45 +431,59 @@
     return NAME_NOT_FOUND;
 }
 
-void KeyCharacterMap::tryRemapKey(int32_t keyCode, int32_t metaState,
-                                  int32_t *outKeyCode, int32_t *outMetaState) const {
-    *outKeyCode = keyCode;
-    *outMetaState = metaState;
+int32_t KeyCharacterMap::applyKeyRemapping(int32_t fromKeyCode) const {
+    int32_t toKeyCode = fromKeyCode;
 
-    const Behavior* behavior = getKeyBehavior(keyCode, metaState);
+    const auto it = mKeyRemapping.find(fromKeyCode);
+    if (it != mKeyRemapping.end()) {
+        toKeyCode = it->second;
+    }
+#if DEBUG_MAPPING
+    ALOGD("applyKeyRemapping: keyCode=%d ~ replacement keyCode=%d.", fromKeyCode, toKeyCode);
+#endif
+    return toKeyCode;
+}
+
+std::pair<int32_t, int32_t> KeyCharacterMap::applyKeyBehavior(int32_t fromKeyCode,
+                                                              int32_t fromMetaState) const {
+    int32_t toKeyCode = fromKeyCode;
+    int32_t toMetaState = fromMetaState;
+
+    const Behavior* behavior = getKeyBehavior(fromKeyCode, fromMetaState);
     if (behavior != nullptr) {
         if (behavior->replacementKeyCode) {
-            *outKeyCode = behavior->replacementKeyCode;
-            int32_t newMetaState = metaState & ~behavior->metaState;
+            toKeyCode = behavior->replacementKeyCode;
+            toMetaState = fromMetaState & ~behavior->metaState;
             // Reset dependent meta states.
             if (behavior->metaState & AMETA_ALT_ON) {
-                newMetaState &= ~(AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON);
+                toMetaState &= ~(AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON);
             }
             if (behavior->metaState & (AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON)) {
-                newMetaState &= ~AMETA_ALT_ON;
+                toMetaState &= ~AMETA_ALT_ON;
             }
             if (behavior->metaState & AMETA_CTRL_ON) {
-                newMetaState &= ~(AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON);
+                toMetaState &= ~(AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON);
             }
             if (behavior->metaState & (AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON)) {
-                newMetaState &= ~AMETA_CTRL_ON;
+                toMetaState &= ~AMETA_CTRL_ON;
             }
             if (behavior->metaState & AMETA_SHIFT_ON) {
-                newMetaState &= ~(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON);
+                toMetaState &= ~(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON);
             }
             if (behavior->metaState & (AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON)) {
-                newMetaState &= ~AMETA_SHIFT_ON;
+                toMetaState &= ~AMETA_SHIFT_ON;
             }
             // ... and put universal bits back if needed
-            *outMetaState = normalizeMetaState(newMetaState);
+            toMetaState = normalizeMetaState(toMetaState);
         }
     }
 
 #if DEBUG_MAPPING
-    ALOGD("tryRemapKey: keyCode=%d, metaState=0x%08x ~ "
-            "replacement keyCode=%d, replacement metaState=0x%08x.",
-            keyCode, metaState, *outKeyCode, *outMetaState);
+    ALOGD("applyKeyBehavior: keyCode=%d, metaState=0x%08x ~ "
+          "replacement keyCode=%d, replacement metaState=0x%08x.",
+          fromKeyCode, fromMetaState, toKeyCode, toMetaState);
 #endif
+    return std::make_pair(toKeyCode, toMetaState);
 }
 
 bool KeyCharacterMap::getKey(int32_t keyCode, const Key** outKey) const {
@@ -720,6 +734,18 @@
             return nullptr;
         }
     }
+    size_t numKeyRemapping = parcel->readInt32();
+    if (parcel->errorCheck()) {
+        return nullptr;
+    }
+    for (size_t i = 0; i < numKeyRemapping; i++) {
+        int32_t key = parcel->readInt32();
+        int32_t value = parcel->readInt32();
+        map->mKeyRemapping.insert_or_assign(key, value);
+        if (parcel->errorCheck()) {
+            return nullptr;
+        }
+    }
     size_t numKeysByScanCode = parcel->readInt32();
     if (parcel->errorCheck()) {
         return nullptr;
@@ -727,7 +753,7 @@
     for (size_t i = 0; i < numKeysByScanCode; i++) {
         int32_t key = parcel->readInt32();
         int32_t value = parcel->readInt32();
-        map->mKeysByScanCode.add(key, value);
+        map->mKeysByScanCode.insert_or_assign(key, value);
         if (parcel->errorCheck()) {
             return nullptr;
         }
@@ -739,7 +765,7 @@
     for (size_t i = 0; i < numKeysByUsageCode; i++) {
         int32_t key = parcel->readInt32();
         int32_t value = parcel->readInt32();
-        map->mKeysByUsageCode.add(key, value);
+        map->mKeysByUsageCode.insert_or_assign(key, value);
         if (parcel->errorCheck()) {
             return nullptr;
         }
@@ -773,17 +799,23 @@
         }
         parcel->writeInt32(0);
     }
+    size_t numKeyRemapping = mKeyRemapping.size();
+    parcel->writeInt32(numKeyRemapping);
+    for (auto const& [fromAndroidKeyCode, toAndroidKeyCode] : mKeyRemapping) {
+        parcel->writeInt32(fromAndroidKeyCode);
+        parcel->writeInt32(toAndroidKeyCode);
+    }
     size_t numKeysByScanCode = mKeysByScanCode.size();
     parcel->writeInt32(numKeysByScanCode);
-    for (size_t i = 0; i < numKeysByScanCode; i++) {
-        parcel->writeInt32(mKeysByScanCode.keyAt(i));
-        parcel->writeInt32(mKeysByScanCode.valueAt(i));
+    for (auto const& [fromScanCode, toAndroidKeyCode] : mKeysByScanCode) {
+        parcel->writeInt32(fromScanCode);
+        parcel->writeInt32(toAndroidKeyCode);
     }
     size_t numKeysByUsageCode = mKeysByUsageCode.size();
     parcel->writeInt32(numKeysByUsageCode);
-    for (size_t i = 0; i < numKeysByUsageCode; i++) {
-        parcel->writeInt32(mKeysByUsageCode.keyAt(i));
-        parcel->writeInt32(mKeysByUsageCode.valueAt(i));
+    for (auto const& [fromUsageCode, toAndroidKeyCode] : mKeysByUsageCode) {
+        parcel->writeInt32(fromUsageCode);
+        parcel->writeInt32(toAndroidKeyCode);
     }
 }
 #endif // __linux__
@@ -950,9 +982,9 @@
                 mapUsage ? "usage" : "scan code", codeToken.string());
         return BAD_VALUE;
     }
-    KeyedVector<int32_t, int32_t>& map =
-            mapUsage ? mMap->mKeysByUsageCode : mMap->mKeysByScanCode;
-    if (map.indexOfKey(code) >= 0) {
+    std::map<int32_t, int32_t>& map = mapUsage ? mMap->mKeysByUsageCode : mMap->mKeysByScanCode;
+    const auto it = map.find(code);
+    if (it != map.end()) {
         ALOGE("%s: Duplicate entry for key %s '%s'.", mTokenizer->getLocation().string(),
                 mapUsage ? "usage" : "scan code", codeToken.string());
         return BAD_VALUE;
@@ -971,7 +1003,7 @@
     ALOGD("Parsed map key %s: code=%d, keyCode=%d.",
             mapUsage ? "usage" : "scan code", code, keyCode);
 #endif
-    map.add(code, keyCode);
+    map.insert_or_assign(code, keyCode);
     return NO_ERROR;
 }
 
diff --git a/libs/input/MotionPredictor.cpp b/libs/input/MotionPredictor.cpp
new file mode 100644
index 0000000..0719fe5
--- /dev/null
+++ b/libs/input/MotionPredictor.cpp
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "MotionPredictor"
+
+#include <input/MotionPredictor.h>
+
+/**
+ * Log debug messages about predictions.
+ * Enable this via "adb shell setprop log.tag.MotionPredictor DEBUG"
+ */
+static bool isDebug() {
+    return __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO);
+}
+
+namespace android {
+
+// --- MotionPredictor ---
+
+MotionPredictor::MotionPredictor(nsecs_t predictionTimestampOffsetNanos,
+                                 std::function<bool()> checkMotionPredictionEnabled)
+      : mPredictionTimestampOffsetNanos(predictionTimestampOffsetNanos),
+        mCheckMotionPredictionEnabled(std::move(checkMotionPredictionEnabled)) {}
+
+void MotionPredictor::record(const MotionEvent& event) {
+    mEvents.push_back({});
+    mEvents.back().copyFrom(&event, /*keepHistory=*/true);
+    if (mEvents.size() > 2) {
+        // Just need 2 samples in order to extrapolate
+        mEvents.erase(mEvents.begin());
+    }
+}
+
+/**
+ * This is an example implementation that should be replaced with the actual prediction.
+ * The returned MotionEvent should be similar to the incoming MotionEvent, except for the
+ * fields that are predicted:
+ *
+ * 1) event.getEventTime
+ * 2) event.getPointerCoords
+ *
+ * The returned event should not contain any of the real, existing data. It should only
+ * contain the predicted samples.
+ */
+std::vector<std::unique_ptr<MotionEvent>> MotionPredictor::predict() {
+    if (mEvents.size() < 2) {
+        return {};
+    }
+
+    const MotionEvent& event = mEvents.back();
+    if (!isPredictionAvailable(event.getDeviceId(), event.getSource())) {
+        return {};
+    }
+
+    std::unique_ptr<MotionEvent> prediction = std::make_unique<MotionEvent>();
+    std::vector<PointerCoords> futureCoords;
+    const int64_t futureTime = getExpectedPresentationTimeNanos() + mPredictionTimestampOffsetNanos;
+    const nsecs_t currentTime = event.getEventTime();
+    const MotionEvent& previous = mEvents.rbegin()[1];
+    const nsecs_t oldTime = previous.getEventTime();
+    if (currentTime == oldTime) {
+        // This can happen if it's an ACTION_POINTER_DOWN event, for example.
+        return {}; // prevent division by zero.
+    }
+
+    for (size_t i = 0; i < event.getPointerCount(); i++) {
+        const int32_t pointerId = event.getPointerId(i);
+        PointerCoords coords;
+        coords.clear();
+
+        ssize_t index = previous.findPointerIndex(pointerId);
+        if (index >= 0) {
+            // We have old data for this pointer. Compute the prediction.
+            const float oldX = previous.getRawX(index);
+            const float oldY = previous.getRawY(index);
+            const float currentX = event.getRawX(i);
+            const float currentY = event.getRawY(i);
+
+            // Let's do a linear interpolation while waiting for a real model
+            const float scale =
+                    static_cast<float>(futureTime - currentTime) / (currentTime - oldTime);
+            const float futureX = currentX + (currentX - oldX) * scale;
+            const float futureY = currentY + (currentY - oldY) * scale;
+
+            coords.setAxisValue(AMOTION_EVENT_AXIS_X, futureX);
+            coords.setAxisValue(AMOTION_EVENT_AXIS_Y, futureY);
+        }
+
+        futureCoords.push_back(coords);
+    }
+
+    ALOGD_IF(isDebug(), "Prediction is %.1f ms away from the event",
+             (futureTime - event.getEventTime()) * 1E-6);
+    /**
+     * The process of adding samples is different for the first and subsequent samples:
+     * 1. Add the first sample via 'initialize' as below
+     * 2. Add subsequent samples via 'addSample'
+     */
+    prediction->initialize(event.getId(), event.getDeviceId(), event.getSource(),
+                           event.getDisplayId(), event.getHmac(), event.getAction(),
+                           event.getActionButton(), event.getFlags(), event.getEdgeFlags(),
+                           event.getMetaState(), event.getButtonState(), event.getClassification(),
+                           event.getTransform(), event.getXPrecision(), event.getYPrecision(),
+                           event.getRawXCursorPosition(), event.getRawYCursorPosition(),
+                           event.getRawTransform(), event.getDownTime(), futureTime,
+                           event.getPointerCount(), event.getPointerProperties(),
+                           futureCoords.data());
+
+    // To add more predicted samples, use 'addSample':
+    prediction->addSample(futureTime + 1, futureCoords.data());
+
+    std::vector<std::unique_ptr<MotionEvent>> out;
+    out.push_back(std::move(prediction));
+    return out;
+}
+
+bool MotionPredictor::isPredictionAvailable(int32_t /*deviceId*/, int32_t source) {
+    // Global flag override
+    if (!mCheckMotionPredictionEnabled()) {
+        ALOGD_IF(isDebug(), "Prediction not available due to flag override");
+        return false;
+    }
+
+    // Prediction is only supported for stylus sources.
+    if (!isFromSource(source, AINPUT_SOURCE_STYLUS)) {
+        ALOGD_IF(isDebug(), "Prediction not available for non-stylus source: %s",
+                 inputEventSourceToString(source).c_str());
+        return false;
+    }
+    return true;
+}
+
+int64_t MotionPredictor::getExpectedPresentationTimeNanos() {
+    std::scoped_lock lock(mLock);
+    return mExpectedPresentationTimeNanos;
+}
+
+void MotionPredictor::setExpectedPresentationTimeNanos(int64_t expectedPresentationTimeNanos) {
+    std::scoped_lock lock(mLock);
+    mExpectedPresentationTimeNanos = expectedPresentationTimeNanos;
+}
+
+} // namespace android
diff --git a/libs/input/tests/Android.bp b/libs/input/tests/Android.bp
index 5aae37d..e2c0860 100644
--- a/libs/input/tests/Android.bp
+++ b/libs/input/tests/Android.bp
@@ -17,6 +17,7 @@
         "InputDevice_test.cpp",
         "InputEvent_test.cpp",
         "InputPublisherAndConsumer_test.cpp",
+        "MotionPredictor_test.cpp",
         "TouchResampling_test.cpp",
         "TouchVideoFrame_test.cpp",
         "VelocityTracker_test.cpp",
@@ -37,6 +38,7 @@
         "libbinder",
         "libcutils",
         "liblog",
+        "libPlatformProperties",
         "libutils",
         "libvintf",
     ],
diff --git a/libs/input/tests/MotionPredictor_test.cpp b/libs/input/tests/MotionPredictor_test.cpp
new file mode 100644
index 0000000..0f39055
--- /dev/null
+++ b/libs/input/tests/MotionPredictor_test.cpp
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+#include <gui/constants.h>
+#include <input/Input.h>
+#include <input/MotionPredictor.h>
+
+namespace android {
+
+constexpr int32_t DOWN = AMOTION_EVENT_ACTION_DOWN;
+constexpr int32_t MOVE = AMOTION_EVENT_ACTION_MOVE;
+
+static MotionEvent getMotionEvent(int32_t action, float x, float y, nsecs_t eventTime) {
+    MotionEvent event;
+    constexpr size_t pointerCount = 1;
+    std::vector<PointerProperties> pointerProperties;
+    std::vector<PointerCoords> pointerCoords;
+    for (size_t i = 0; i < pointerCount; i++) {
+        PointerProperties properties;
+        properties.clear();
+        properties.id = i;
+        pointerProperties.push_back(properties);
+        PointerCoords coords;
+        coords.clear();
+        coords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        coords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        pointerCoords.push_back(coords);
+    }
+
+    ui::Transform identityTransform;
+    event.initialize(InputEvent::nextId(), /*deviceId=*/0, AINPUT_SOURCE_STYLUS,
+                     ADISPLAY_ID_DEFAULT, {0}, action, /*actionButton=*/0, /*flags=*/0,
+                     AMOTION_EVENT_EDGE_FLAG_NONE, AMETA_NONE, /*buttonState=*/0,
+                     MotionClassification::NONE, identityTransform, /*xPrecision=*/0.1,
+                     /*yPrecision=*/0.2, /*xCursorPosition=*/280, /*yCursorPosition=*/540,
+                     identityTransform, /*downTime=*/100, eventTime, pointerCount,
+                     pointerProperties.data(), pointerCoords.data());
+    return event;
+}
+
+/**
+ * A linear motion should be predicted to be linear in the future
+ */
+TEST(MotionPredictorTest, LinearPrediction) {
+    MotionPredictor predictor(/*predictionTimestampOffsetNanos=*/0,
+                              []() { return true /*enable prediction*/; });
+
+    predictor.record(getMotionEvent(DOWN, 0, 1, 0));
+    predictor.record(getMotionEvent(MOVE, 1, 3, 10));
+    predictor.record(getMotionEvent(MOVE, 2, 5, 20));
+    predictor.record(getMotionEvent(MOVE, 3, 7, 30));
+    predictor.setExpectedPresentationTimeNanos(40);
+    std::vector<std::unique_ptr<MotionEvent>> predicted = predictor.predict();
+    ASSERT_EQ(1u, predicted.size());
+    ASSERT_EQ(predicted[0]->getX(0), 4);
+    ASSERT_EQ(predicted[0]->getY(0), 9);
+}
+
+/**
+ * A still motion should be predicted to remain still
+ */
+TEST(MotionPredictorTest, StationaryPrediction) {
+    MotionPredictor predictor(/*predictionTimestampOffsetNanos=*/0,
+                              []() { return true /*enable prediction*/; });
+
+    predictor.record(getMotionEvent(DOWN, 0, 1, 0));
+    predictor.record(getMotionEvent(MOVE, 0, 1, 10));
+    predictor.record(getMotionEvent(MOVE, 0, 1, 20));
+    predictor.record(getMotionEvent(MOVE, 0, 1, 30));
+    predictor.setExpectedPresentationTimeNanos(40);
+    std::vector<std::unique_ptr<MotionEvent>> predicted = predictor.predict();
+    ASSERT_EQ(1u, predicted.size());
+    ASSERT_EQ(predicted[0]->getX(0), 0);
+    ASSERT_EQ(predicted[0]->getY(0), 1);
+}
+
+TEST(MotionPredictorTest, IsPredictionAvailable) {
+    MotionPredictor predictor(/*predictionTimestampOffsetNanos=*/0,
+                              []() { return true /*enable prediction*/; });
+    ASSERT_TRUE(predictor.isPredictionAvailable(/*deviceId=*/1, AINPUT_SOURCE_STYLUS));
+    ASSERT_FALSE(predictor.isPredictionAvailable(/*deviceId=*/1, AINPUT_SOURCE_TOUCHSCREEN));
+}
+
+TEST(MotionPredictorTest, Offset) {
+    MotionPredictor predictor(/*predictionTimestampOffsetNanos=*/1,
+                              []() { return true /*enable prediction*/; });
+    predictor.setExpectedPresentationTimeNanos(40);
+    predictor.record(getMotionEvent(DOWN, 0, 1, 30));
+    predictor.record(getMotionEvent(MOVE, 0, 1, 35));
+    std::vector<std::unique_ptr<MotionEvent>> predicted = predictor.predict();
+    ASSERT_EQ(1u, predicted.size());
+    ASSERT_GE(predicted[0]->getEventTime(), 41);
+}
+
+TEST(MotionPredictionTest, FlagDisablesPrediction) {
+    MotionPredictor predictor(/*predictionTimestampOffsetNanos=*/0,
+                              []() { return false /*disable prediction*/; });
+    predictor.setExpectedPresentationTimeNanos(40);
+    predictor.record(getMotionEvent(DOWN, 0, 1, 30));
+    predictor.record(getMotionEvent(MOVE, 0, 1, 35));
+    std::vector<std::unique_ptr<MotionEvent>> predicted = predictor.predict();
+    ASSERT_EQ(0u, predicted.size());
+    ASSERT_FALSE(predictor.isPredictionAvailable(/*deviceId=*/1, AINPUT_SOURCE_STYLUS));
+    ASSERT_FALSE(predictor.isPredictionAvailable(/*deviceId=*/1, AINPUT_SOURCE_TOUCHSCREEN));
+}
+
+} // namespace android
diff --git a/libs/jpegrecoverymap/include/jpegrecoverymap/jpegdecoder.h b/libs/jpegrecoverymap/include/jpegrecoverymap/jpegdecoder.h
index 5c9c8b6..39c79c9 100644
--- a/libs/jpegrecoverymap/include/jpegrecoverymap/jpegdecoder.h
+++ b/libs/jpegrecoverymap/include/jpegrecoverymap/jpegdecoder.h
@@ -47,7 +47,7 @@
      */
     void* getDecompressedImagePtr();
     /*
-     * Returns the decompressed raw image buffer size. This method must be called only after
+     * Returns the decompressed raw image buffer size. This mgit ethod must be called only after
      * calling decompressImage().
      */
     size_t getDecompressedImageSize();
@@ -67,14 +67,35 @@
     void* getXMPPtr();
     /*
      * Returns the decompressed XMP buffer size. This method must be called only after
-     * calling decompressImage().
+     * calling decompressImage() or getCompressedImageParameters().
      */
     size_t getXMPSize();
-
+    /*
+     * Returns the EXIF data from the image.
+     */
+    void* getEXIFPtr();
+    /*
+     * Returns the decompressed EXIF buffer size. This method must be called only after
+     * calling decompressImage() or getCompressedImageParameters().
+     */
+    size_t getEXIFSize();
+    /*
+     * Returns the position offset of EXIF package
+     * (4 bypes offset to FF sign, the byte after FF E1 XX XX <this byte>),
+     * or -1  if no EXIF exists.
+     */
+    int getEXIFPos() { return mExifPos; }
+    /*
+     * Decompresses metadata of the image.
+     */
     bool getCompressedImageParameters(const void* image, int length,
-                              size_t* pWidth, size_t* pHeight,
-                              std::vector<uint8_t>* &iccData,
-                              std::vector<uint8_t>* &exifData);
+                                      size_t* pWidth, size_t* pHeight,
+                                      std::vector<uint8_t>* &iccData,
+                                      std::vector<uint8_t>* &exifData);
+    /*
+     * Extracts EXIF package and updates the EXIF position / length without decoding the image.
+     */
+    bool extractEXIF(const void* image, int length);
 
 private:
     bool decode(const void* image, int length);
@@ -89,10 +110,14 @@
     std::vector<JOCTET> mResultBuffer;
     // The buffer that holds XMP Data.
     std::vector<JOCTET> mXMPBuffer;
+    // The buffer that holds EXIF Data.
+    std::vector<JOCTET> mEXIFBuffer;
 
     // Resolution of the decompressed image.
     size_t mWidth;
     size_t mHeight;
+    // Position of EXIF package, default value is -1 which means no EXIF package appears.
+    size_t mExifPos;
 };
 } /* namespace android  */
 
diff --git a/libs/jpegrecoverymap/include/jpegrecoverymap/jpegrerrorcode.h b/libs/jpegrecoverymap/include/jpegrecoverymap/jpegrerrorcode.h
index 9f53a57..6995762 100644
--- a/libs/jpegrecoverymap/include/jpegrecoverymap/jpegrerrorcode.h
+++ b/libs/jpegrecoverymap/include/jpegrecoverymap/jpegrerrorcode.h
@@ -44,6 +44,7 @@
     ERROR_JPEGR_DECODE_ERROR            = JPEGR_RUNTIME_ERROR_BASE - 2,
     ERROR_JPEGR_CALCULATION_ERROR       = JPEGR_RUNTIME_ERROR_BASE - 3,
     ERROR_JPEGR_METADATA_ERROR          = JPEGR_RUNTIME_ERROR_BASE - 4,
+    ERROR_JPEGR_TONEMAP_ERROR           = JPEGR_RUNTIME_ERROR_BASE - 5,
 };
 
 }  // namespace android::recoverymap
diff --git a/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymap.h b/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymap.h
index 5597303..905bf16 100644
--- a/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymap.h
+++ b/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymap.h
@@ -30,8 +30,9 @@
 
 // Transfer functions as defined for XMP metadata
 typedef enum {
-  JPEGR_TF_HLG = 0,
-  JPEGR_TF_PQ = 1,
+  JPEGR_TF_LINEAR = 0,
+  JPEGR_TF_HLG = 1,
+  JPEGR_TF_PQ = 2,
 } jpegr_transfer_function;
 
 struct jpegr_info_struct {
@@ -129,6 +130,28 @@
 class RecoveryMap {
 public:
     /*
+     * Encode API-0
+     * Compress JPEGR image from 10-bit HDR YUV.
+     *
+     * Tonemap the HDR input to a SDR image, generate recovery map from the HDR and SDR images,
+     * compress SDR YUV to 8-bit JPEG and append the recovery map to the end of the compressed
+     * JPEG.
+     * @param uncompressed_p010_image uncompressed HDR image in P010 color format
+     * @param hdr_tf transfer function of the HDR image
+     * @param dest destination of the compressed JPEGR image
+     * @param quality target quality of the JPEG encoding, must be in range of 0-100 where 100 is
+     *                the highest quality
+     * @param exif pointer to the exif metadata.
+     * @return NO_ERROR if encoding succeeds, error code if error occurs.
+     */
+    status_t encodeJPEGR(jr_uncompressed_ptr uncompressed_p010_image,
+                         jpegr_transfer_function hdr_tf,
+                         jr_compressed_ptr dest,
+                         int quality,
+                         jr_exif_ptr exif);
+
+    /*
+     * Encode API-1
      * Compress JPEGR image from 10-bit HDR YUV and 8-bit SDR YUV.
      *
      * Generate recovery map from the HDR and SDR inputs, compress SDR YUV to 8-bit JPEG and append
@@ -151,6 +174,7 @@
                          jr_exif_ptr exif);
 
     /*
+     * Encode API-2
      * Compress JPEGR image from 10-bit HDR YUV, 8-bit SDR YUV and compressed 8-bit JPEG.
      *
      * This method requires HAL Hardware JPEG encoder.
@@ -159,6 +183,8 @@
      * compressed JPEG. HDR and SDR inputs must be the same resolution and color space.
      * @param uncompressed_p010_image uncompressed HDR image in P010 color format
      * @param uncompressed_yuv_420_image uncompressed SDR image in YUV_420 color format
+     *                                   Note: the SDR image must be the decoded version of the JPEG
+     *                                         input
      * @param compressed_jpeg_image compressed 8-bit JPEG image
      * @param hdr_tf transfer function of the HDR image
      * @param dest destination of the compressed JPEGR image
@@ -171,6 +197,7 @@
                          jr_compressed_ptr dest);
 
     /*
+     * Encode API-3
      * Compress JPEGR image from 10-bit HDR YUV and 8-bit SDR YUV.
      *
      * This method requires HAL Hardware JPEG encoder.
@@ -190,6 +217,7 @@
                          jr_compressed_ptr dest);
 
     /*
+     * Decode API
      * Decompress JPEGR image.
      *
      * The output JPEGR image is in RGBA_1010102 data format if decoding to HDR.
@@ -223,16 +251,6 @@
                           jr_info_ptr jpegr_info);
 private:
     /*
-     * This method is called in the decoding pipeline. It will decode the recovery map.
-     *
-     * @param compressed_recovery_map compressed recovery map
-     * @param dest decoded recover map
-     * @return NO_ERROR if decoding succeeds, error code if error occurs.
-     */
-    status_t decompressRecoveryMap(jr_compressed_ptr compressed_recovery_map,
-                               jr_uncompressed_ptr dest);
-
-    /*
      * This method is called in the encoding pipeline. It will encode the recovery map.
      *
      * @param uncompressed_recovery_map uncompressed recovery map
@@ -307,55 +325,26 @@
      *
      * @param compressed_jpeg_image compressed 8-bit JPEG image
      * @param compress_recovery_map compressed recover map
+     * @param exif EXIF package
      * @param metadata JPEG/R metadata to encode in XMP of the jpeg
      * @param dest compressed JPEGR image
      * @return NO_ERROR if calculation succeeds, error code if error occurs.
      */
     status_t appendRecoveryMap(jr_compressed_ptr compressed_jpeg_image,
                                jr_compressed_ptr compressed_recovery_map,
+                               jr_exif_ptr exif,
                                jr_metadata_ptr metadata,
                                jr_compressed_ptr dest);
 
     /*
-     * This method generates XMP metadata.
+     * This method will tone map a HDR image to an SDR image.
      *
-     * below is an example of the XMP metadata that this function generates where
-     * secondary_image_length = 1000
-     * range_scaling_factor = 1.25
-     *
-     * <x:xmpmeta
-     *   xmlns:x="adobe:ns:meta/"
-     *   x:xmptk="Adobe XMP Core 5.1.2">
-     *   <rdf:RDF
-     *     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
-     *     <rdf:Description
-     *       xmlns:GContainer="http://ns.google.com/photos/1.0/container/">
-     *       <GContainer:Version>1</GContainer:Version>
-     *       <GContainer:RangeScalingFactor>1.25</GContainer:RangeScalingFactor>
-     *       <GContainer:Directory>
-     *         <rdf:Seq>
-     *           <rdf:li>
-     *             <GContainer:Item
-     *               Item:Semantic="Primary"
-     *               Item:Mime="image/jpeg"/>
-     *           </rdf:li>
-     *           <rdf:li>
-     *             <GContainer:Item
-     *               Item:Semantic="RecoveryMap"
-     *               Item:Mime="image/jpeg"
-     *               Item:Length="1000"/>
-     *           </rdf:li>
-     *         </rdf:Seq>
-     *       </GContainer:Directory>
-     *     </rdf:Description>
-     *   </rdf:RDF>
-     * </x:xmpmeta>
-     *
-     * @param secondary_image_length length of secondary image
-     * @param metadata JPEG/R metadata to encode as XMP
-     * @return XMP metadata in type of string
+     * @param uncompressed_p010_image (input) uncompressed P010 image
+     * @param dest (output) tone mapping result as a YUV_420 image
+     * @return NO_ERROR if calculation succeeds, error code if error occurs.
      */
-    std::string generateXmp(int secondary_image_length, jpegr_metadata& metadata);
+    status_t toneMap(jr_uncompressed_ptr uncompressed_p010_image,
+                     jr_uncompressed_ptr dest);
 };
 
 } // namespace android::recoverymap
diff --git a/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymaputils.h b/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymaputils.h
index e35f2d7..e61d0c4 100644
--- a/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymaputils.h
+++ b/libs/jpegrecoverymap/include/jpegrecoverymap/recoverymaputils.h
@@ -17,10 +17,11 @@
 #ifndef ANDROID_JPEGRECOVERYMAP_RECOVERYMAPUTILS_H
 #define ANDROID_JPEGRECOVERYMAP_RECOVERYMAPUTILS_H
 
+#include <sstream>
 #include <stdint.h>
+#include <string>
 #include <cstdio>
 
-
 namespace android::recoverymap {
 
 struct jpegr_metadata;
@@ -35,6 +36,53 @@
 */
 bool getMetadataFromXMP(uint8_t* xmp_data, size_t xmp_size, jpegr_metadata* metadata);
 
+/*
+ * This method generates XMP metadata.
+ *
+ * below is an example of the XMP metadata that this function generates where
+ * secondary_image_length = 1000
+ * range_scaling_factor = 1.25
+ *
+ * <x:xmpmeta
+ *   xmlns:x="adobe:ns:meta/"
+ *   x:xmptk="Adobe XMP Core 5.1.2">
+ *   <rdf:RDF
+ *     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+ *     <rdf:Description
+ *       xmlns:GContainer="http://ns.google.com/photos/1.0/container/"
+ *       xmlns:RecoveryMap="http://ns.google.com/photos/1.0/recoverymap/">
+ *       <GContainer:Version>1</GContainer:Version>
+ *       <GContainer:Directory>
+ *         <rdf:Seq>
+ *           <rdf:li>
+ *             <GContainer:Item
+ *               Item:Semantic="Primary"
+ *               Item:Mime="image/jpeg"
+ *               RecoveryMap:Version=”1”
+ *               RecoveryMap:RangeScalingFactor=”1.25”
+ *               RecoveryMap:TransferFunction=”2”/>
+ *               <RecoveryMap:HDR10Metadata
+ *                 // some attributes
+ *                 // some elements
+ *               </RecoveryMap:HDR10Metadata>
+ *           </rdf:li>
+ *           <rdf:li>
+ *             <GContainer:Item
+ *               Item:Semantic="RecoveryMap"
+ *               Item:Mime="image/jpeg"
+ *               Item:Length="1000"/>
+ *           </rdf:li>
+ *         </rdf:Seq>
+ *       </GContainer:Directory>
+ *     </rdf:Description>
+ *   </rdf:RDF>
+ * </x:xmpmeta>
+ *
+ * @param secondary_image_length length of secondary image
+ * @param metadata JPEG/R metadata to encode as XMP
+ * @return XMP metadata in type of string
+ */
+std::string generateXmp(int secondary_image_length, jpegr_metadata& metadata);
 }
 
 #endif //ANDROID_JPEGRECOVERYMAP_RECOVERYMAPUTILS_H
\ No newline at end of file
diff --git a/libs/jpegrecoverymap/jpegdecoder.cpp b/libs/jpegrecoverymap/jpegdecoder.cpp
index 0185e55..c2a8f45 100644
--- a/libs/jpegrecoverymap/jpegdecoder.cpp
+++ b/libs/jpegrecoverymap/jpegdecoder.cpp
@@ -26,8 +26,12 @@
 
 namespace android::recoverymap {
 
-const uint32_t kExifMarker = JPEG_APP0 + 1;
-const uint32_t kICCMarker = JPEG_APP0 + 2;
+const uint32_t kAPP0Marker = JPEG_APP0;      // JFIF
+const uint32_t kAPP1Marker = JPEG_APP0 + 1;  // EXIF, XMP
+const uint32_t kAPP2Marker = JPEG_APP0 + 2;  // ICC
+
+const std::string kXmpNameSpace = "http://ns.adobe.com/xap/1.0/";
+const std::string kExifIdCode = "Exif";
 
 struct jpegr_source_mgr : jpeg_source_mgr {
     jpegr_source_mgr(const uint8_t* ptr, int len);
@@ -83,6 +87,7 @@
 }
 
 JpegDecoder::JpegDecoder() {
+  mExifPos = 0;
 }
 
 JpegDecoder::~JpegDecoder() {
@@ -119,6 +124,13 @@
     return mXMPBuffer.size();
 }
 
+void* JpegDecoder::getEXIFPtr() {
+    return mEXIFBuffer.data();
+}
+
+size_t JpegDecoder::getEXIFSize() {
+    return mEXIFBuffer.size();
+}
 
 size_t JpegDecoder::getDecompressedImageWidth() {
     return mWidth;
@@ -132,7 +144,6 @@
     jpeg_decompress_struct cinfo;
     jpegr_source_mgr mgr(static_cast<const uint8_t*>(image), length);
     jpegrerror_mgr myerr;
-    string nameSpace = "http://ns.adobe.com/xap/1.0/";
 
     cinfo.err = jpeg_std_error(&myerr.pub);
     myerr.pub.error_exit = jpegrerror_exit;
@@ -143,26 +154,59 @@
     }
     jpeg_create_decompress(&cinfo);
 
-    jpeg_save_markers(&cinfo, kExifMarker, 0xFFFF);
+    jpeg_save_markers(&cinfo, kAPP0Marker, 0xFFFF);
+    jpeg_save_markers(&cinfo, kAPP1Marker, 0xFFFF);
+    jpeg_save_markers(&cinfo, kAPP2Marker, 0xFFFF);
 
     cinfo.src = &mgr;
     jpeg_read_header(&cinfo, TRUE);
 
-    // Save XMP Data
-    for (jpeg_marker_struct* marker = cinfo.marker_list; marker; marker = marker->next) {
-        if (marker->marker == kExifMarker) {
-            const unsigned int len = marker->data_length;
-            if (len > nameSpace.size() &&
-                !strncmp(reinterpret_cast<const char*>(marker->data),
-                         nameSpace.c_str(), nameSpace.size())) {
-                mXMPBuffer.resize(len+1, 0);
-                memcpy(static_cast<void*>(mXMPBuffer.data()), marker->data, len);
-                break;
-            }
+    // Save XMP data and EXIF data.
+    // Here we only handle the first XMP / EXIF package.
+    // The parameter pos is used for capturing start offset of EXIF, which is hacky, but working...
+    // We assume that all packages are starting with two bytes marker (eg FF E1 for EXIF package),
+    // two bytes of package length which is stored in marker->original_length, and the real data
+    // which is stored in marker->data. The pos is adding up all previous package lengths (
+    // 4 bytes marker and length, marker->original_length) before EXIF appears. Note that here we
+    // we are using marker->original_length instead of marker->data_length because in case the real
+    // package length is larger than the limitation, jpeg-turbo will only copy the data within the
+    // limitation (represented by data_length) and this may vary from original_length / real offset.
+    // A better solution is making jpeg_marker_struct holding the offset, but currently it doesn't.
+    bool exifAppears = false;
+    bool xmpAppears = false;
+    size_t pos = 2;  // position after SOI
+    for (jpeg_marker_struct* marker = cinfo.marker_list;
+         marker && !(exifAppears && xmpAppears);
+         marker = marker->next) {
+
+        pos += 4;
+        pos += marker->original_length;
+
+        if (marker->marker != kAPP1Marker) {
+            continue;
+        }
+
+        const unsigned int len = marker->data_length;
+        if (!xmpAppears &&
+            len > kXmpNameSpace.size() &&
+            !strncmp(reinterpret_cast<const char*>(marker->data),
+                     kXmpNameSpace.c_str(),
+                     kXmpNameSpace.size())) {
+            mXMPBuffer.resize(len+1, 0);
+            memcpy(static_cast<void*>(mXMPBuffer.data()), marker->data, len);
+            xmpAppears = true;
+        } else if (!exifAppears &&
+                   len > kExifIdCode.size() &&
+                   !strncmp(reinterpret_cast<const char*>(marker->data),
+                            kExifIdCode.c_str(),
+                            kExifIdCode.size())) {
+            mEXIFBuffer.resize(len, 0);
+            memcpy(static_cast<void*>(mEXIFBuffer.data()), marker->data, len);
+            exifAppears = true;
+            mExifPos = pos - marker->original_length;
         }
     }
 
-
     mWidth = cinfo.image_width;
     mHeight = cinfo.image_height;
 
@@ -189,6 +233,60 @@
     return true;
 }
 
+// TODO (Fyodor/Dichen): merge this method with getCompressedImageParameters() since they have
+// similar functionality. Yet Dichen is not familiar with who's calling
+// getCompressedImageParameters(), looks like it's used by some pending CLs.
+bool JpegDecoder::extractEXIF(const void* image, int length) {
+    jpeg_decompress_struct cinfo;
+    jpegr_source_mgr mgr(static_cast<const uint8_t*>(image), length);
+    jpegrerror_mgr myerr;
+
+    cinfo.err = jpeg_std_error(&myerr.pub);
+    myerr.pub.error_exit = jpegrerror_exit;
+
+    if (setjmp(myerr.setjmp_buffer)) {
+        jpeg_destroy_decompress(&cinfo);
+        return false;
+    }
+    jpeg_create_decompress(&cinfo);
+
+    jpeg_save_markers(&cinfo, kAPP0Marker, 0xFFFF);
+    jpeg_save_markers(&cinfo, kAPP1Marker, 0xFFFF);
+    jpeg_save_markers(&cinfo, kAPP2Marker, 0xFFFF);
+
+    cinfo.src = &mgr;
+    jpeg_read_header(&cinfo, TRUE);
+
+    bool exifAppears = false;
+    size_t pos = 2;  // position after SOI
+    for (jpeg_marker_struct* marker = cinfo.marker_list;
+         marker && !exifAppears;
+         marker = marker->next) {
+
+        pos += 4;
+        pos += marker->original_length;
+
+        if (marker->marker != kAPP1Marker) {
+            continue;
+        }
+
+        const unsigned int len = marker->data_length;
+        if (!exifAppears &&
+            len > kExifIdCode.size() &&
+            !strncmp(reinterpret_cast<const char*>(marker->data),
+                     kExifIdCode.c_str(),
+                     kExifIdCode.size())) {
+            mEXIFBuffer.resize(len, 0);
+            memcpy(static_cast<void*>(mEXIFBuffer.data()), marker->data, len);
+            exifAppears = true;
+            mExifPos = pos - marker->original_length;
+        }
+    }
+
+    jpeg_destroy_decompress(&cinfo);
+    return true;
+}
+
 bool JpegDecoder::decompress(jpeg_decompress_struct* cinfo, const uint8_t* dest,
         bool isSingleChannel) {
     if (isSingleChannel) {
@@ -212,8 +310,8 @@
     }
     jpeg_create_decompress(&cinfo);
 
-    jpeg_save_markers(&cinfo, kExifMarker, 0xFFFF);
-    jpeg_save_markers(&cinfo, kICCMarker, 0xFFFF);
+    jpeg_save_markers(&cinfo, kAPP1Marker, 0xFFFF);
+    jpeg_save_markers(&cinfo, kAPP2Marker, 0xFFFF);
 
     cinfo.src = &mgr;
     if (jpeg_read_header(&cinfo, TRUE) != JPEG_HEADER_OK) {
diff --git a/libs/jpegrecoverymap/recoverymap.cpp b/libs/jpegrecoverymap/recoverymap.cpp
index f7f3622..53fa8ce 100644
--- a/libs/jpegrecoverymap/recoverymap.cpp
+++ b/libs/jpegrecoverymap/recoverymap.cpp
@@ -21,7 +21,6 @@
 #include <jpegrecoverymap/recoverymaputils.h>
 
 #include <image_io/jpeg/jpeg_marker.h>
-#include <image_io/xml/xml_writer.h>
 #include <image_io/jpeg/jpeg_info.h>
 #include <image_io/jpeg/jpeg_scanner.h>
 #include <image_io/jpeg/jpeg_info_builder.h>
@@ -65,19 +64,6 @@
 };
 
 /*
- * Helper function used for generating XMP metadata.
- *
- * @param prefix The prefix part of the name.
- * @param suffix The suffix part of the name.
- * @return A name of the form "prefix:suffix".
- */
-string Name(const string &prefix, const string &suffix) {
-  std::stringstream ss;
-  ss << prefix << ":" << suffix;
-  return ss.str();
-}
-
-/*
  * Helper function used for writing data to destination.
  *
  * @param destination destination of the data to be written.
@@ -96,12 +82,186 @@
   return NO_ERROR;
 }
 
+status_t Write(jr_exif_ptr destination, const void* source, size_t length, int &position) {
+  memcpy((uint8_t*)destination->data + sizeof(uint8_t) * position, source, length);
+  position += length;
+  return NO_ERROR;
+}
+
+// If the EXIF package doesn't exist in the input JPEG, we'll create one with one entry
+// where the length is represented by this value.
+const size_t PSEUDO_EXIF_PACKAGE_LENGTH = 28;
+// If the EXIF package exists in the input JPEG, we'll add an "JR" entry where the length is
+// represented by this value.
+const size_t EXIF_J_R_ENTRY_LENGTH = 12;
+
+/*
+ * Helper function
+ * Add J R entry to existing exif, or create a new one with J R entry if it's null.
+ * EXIF syntax / change:
+ * ori:
+ * FF E1 - APP1
+ * 01 FC - size of APP1 (to be calculated)
+ * -----------------------------------------------------
+ * 45 78 69 66 00 00 - Exif\0\0 "Exif header"
+ * 49 49 2A 00 - TIFF Header
+ * 08 00 00 00 - offset to the IFD (image file directory)
+ * 06 00 - 6 entries
+ * 00 01 - Width Tag
+ * 03 00 - 'Short' type
+ * 01 00 00 00 - one entry
+ * 00 05 00 00 - image with 0x500
+ *--------------------------------------------------------------------------
+ * new:
+ * FF E1 - APP1
+ * 02 08 - new size, equals to old size + EXIF_J_R_ENTRY_LENGTH (12)
+ *-----------------------------------------------------
+ * 45 78 69 66 00 00 - Exif\0\0 "Exif header"
+ * 49 49 2A 00 - TIFF Header
+ * 08 00 00 00 - offset to the IFD (image file directory)
+ * 07 00 - +1 entry
+ * 4A 52   Custom ('J''R') Tag
+ * 07 00 - Unknown type
+ * 01 00 00 00 - one element
+ * 00 00 00 00 - empty data
+ * 00 01 - Width Tag
+ * 03 00 - 'Short' type
+ * 01 00 00 00 - one entry
+ * 00 05 00 00 - image with 0x500
+ */
+status_t updateExif(jr_exif_ptr exif, jr_exif_ptr dest) {
+  if (exif == nullptr || exif->data == nullptr) {
+    uint8_t data[PSEUDO_EXIF_PACKAGE_LENGTH] = {
+        0x45, 0x78, 0x69, 0x66, 0x00, 0x00,
+        0x49, 0x49, 0x2A, 0x00,
+        0x08, 0x00, 0x00, 0x00,
+        0x01, 0x00,
+        0x4A, 0x52,
+        0x07, 0x00,
+        0x01, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00};
+    int pos = 0;
+    Write(dest, data, PSEUDO_EXIF_PACKAGE_LENGTH, pos);
+    return NO_ERROR;
+  }
+
+  int num_entry = 0;
+  uint8_t num_entry_low = 0;
+  uint8_t num_entry_high = 0;
+  bool use_big_endian = false;
+  if (reinterpret_cast<uint16_t*>(exif->data)[3] == 0x4949) {
+      num_entry_low = reinterpret_cast<uint8_t*>(exif->data)[14];
+      num_entry_high = reinterpret_cast<uint8_t*>(exif->data)[15];
+  } else if (reinterpret_cast<uint16_t*>(exif->data)[3] == 0x4d4d) {
+      use_big_endian = true;
+      num_entry_high = reinterpret_cast<uint8_t*>(exif->data)[14];
+      num_entry_low = reinterpret_cast<uint8_t*>(exif->data)[15];
+  } else {
+      return ERROR_JPEGR_METADATA_ERROR;
+  }
+  num_entry = (num_entry_high << 8) | num_entry_low;
+  num_entry += 1;
+  num_entry_low = num_entry & 0xff;
+  num_entry_high = (num_entry << 8) & 0xff;
+
+  int pos = 0;
+  Write(dest, (uint8_t*)exif->data, 14, pos);
+
+  if (use_big_endian) {
+    Write(dest, &num_entry_high, 1, pos);
+    Write(dest, &num_entry_low, 1, pos);
+    uint8_t data[EXIF_J_R_ENTRY_LENGTH] = {
+          0x4A, 0x52,
+          0x07, 0x00,
+          0x01, 0x00, 0x00, 0x00,
+          0x00, 0x00, 0x00, 0x00};
+    Write(dest, data, EXIF_J_R_ENTRY_LENGTH, pos);
+  } else {
+    Write(dest, &num_entry_low, 1, pos);
+    Write(dest, &num_entry_high, 1, pos);
+    uint8_t data[EXIF_J_R_ENTRY_LENGTH] = {
+          0x4A, 0x52,
+          0x00, 0x07,
+          0x00, 0x00, 0x00, 0x01,
+          0x00, 0x00, 0x00, 0x00};
+    Write(dest, data, EXIF_J_R_ENTRY_LENGTH, pos);
+  }
+
+  Write(dest, (uint8_t*)exif->data + 16, exif->length - 16, pos);
+
+  return NO_ERROR;
+}
+
+/* Encode API-0 */
+status_t RecoveryMap::encodeJPEGR(jr_uncompressed_ptr uncompressed_p010_image,
+                                  jpegr_transfer_function hdr_tf,
+                                  jr_compressed_ptr dest,
+                                  int quality,
+                                  jr_exif_ptr exif) {
+  if (uncompressed_p010_image == nullptr || dest == nullptr) {
+    return ERROR_JPEGR_INVALID_NULL_PTR;
+  }
+
+  if (quality < 0 || quality > 100) {
+    return ERROR_JPEGR_INVALID_INPUT_TYPE;
+  }
+
+  jpegr_metadata metadata;
+  metadata.version = kJpegrVersion;
+  metadata.transferFunction = hdr_tf;
+  if (hdr_tf == JPEGR_TF_PQ) {
+    metadata.hdr10Metadata.st2086Metadata = kSt2086Metadata;
+  }
+
+  jpegr_uncompressed_struct uncompressed_yuv_420_image;
+  JPEGR_CHECK(toneMap(uncompressed_p010_image, &uncompressed_yuv_420_image));
+
+  jpegr_uncompressed_struct map;
+  JPEGR_CHECK(generateRecoveryMap(
+      &uncompressed_yuv_420_image, uncompressed_p010_image, &metadata, &map));
+  std::unique_ptr<uint8_t[]> map_data;
+  map_data.reset(reinterpret_cast<uint8_t*>(map.data));
+
+  jpegr_compressed_struct compressed_map;
+  compressed_map.maxLength = map.width * map.height;
+  unique_ptr<uint8_t[]> compressed_map_data = make_unique<uint8_t[]>(compressed_map.maxLength);
+  compressed_map.data = compressed_map_data.get();
+  JPEGR_CHECK(compressRecoveryMap(&map, &compressed_map));
+
+  JpegEncoder jpeg_encoder;
+  // TODO: determine ICC data based on color gamut information
+  if (!jpeg_encoder.compressImage(uncompressed_yuv_420_image.data,
+                                  uncompressed_yuv_420_image.width,
+                                  uncompressed_yuv_420_image.height, quality, nullptr, 0)) {
+    return ERROR_JPEGR_ENCODE_ERROR;
+  }
+  jpegr_compressed_struct jpeg;
+  jpeg.data = jpeg_encoder.getCompressedImagePtr();
+  jpeg.length = jpeg_encoder.getCompressedImageSize();
+
+  jpegr_exif_struct new_exif;
+  if (exif->data == nullptr) {
+      new_exif.length = PSEUDO_EXIF_PACKAGE_LENGTH;
+  } else {
+      new_exif.length = exif->length + EXIF_J_R_ENTRY_LENGTH;
+  }
+  new_exif.data = new uint8_t[new_exif.length];
+  std::unique_ptr<uint8_t[]> new_exif_data;
+  new_exif_data.reset(reinterpret_cast<uint8_t*>(new_exif.data));
+  JPEGR_CHECK(updateExif(exif, &new_exif));
+
+  JPEGR_CHECK(appendRecoveryMap(&jpeg, &compressed_map, &new_exif, &metadata, dest));
+
+  return NO_ERROR;
+}
+
+/* Encode API-1 */
 status_t RecoveryMap::encodeJPEGR(jr_uncompressed_ptr uncompressed_p010_image,
                                   jr_uncompressed_ptr uncompressed_yuv_420_image,
                                   jpegr_transfer_function hdr_tf,
                                   jr_compressed_ptr dest,
                                   int quality,
-                                  jr_exif_ptr /* exif */) {
+                                  jr_exif_ptr exif) {
   if (uncompressed_p010_image == nullptr
    || uncompressed_yuv_420_image == nullptr
    || dest == nullptr) {
@@ -147,11 +307,24 @@
   jpeg.data = jpeg_encoder.getCompressedImagePtr();
   jpeg.length = jpeg_encoder.getCompressedImageSize();
 
-  JPEGR_CHECK(appendRecoveryMap(&jpeg, &compressed_map, &metadata, dest));
+  jpegr_exif_struct new_exif;
+  if (exif == nullptr || exif->data == nullptr) {
+      new_exif.length = PSEUDO_EXIF_PACKAGE_LENGTH;
+  } else {
+      new_exif.length = exif->length + EXIF_J_R_ENTRY_LENGTH;
+  }
+
+  new_exif.data = new uint8_t[new_exif.length];
+  std::unique_ptr<uint8_t[]> new_exif_data;
+  new_exif_data.reset(reinterpret_cast<uint8_t*>(new_exif.data));
+  JPEGR_CHECK(updateExif(exif, &new_exif));
+
+  JPEGR_CHECK(appendRecoveryMap(&jpeg, &compressed_map, &new_exif, &metadata, dest));
 
   return NO_ERROR;
 }
 
+/* Encode API-2 */
 status_t RecoveryMap::encodeJPEGR(jr_uncompressed_ptr uncompressed_p010_image,
                                   jr_uncompressed_ptr uncompressed_yuv_420_image,
                                   jr_compressed_ptr compressed_jpeg_image,
@@ -188,11 +361,46 @@
   compressed_map.data = compressed_map_data.get();
   JPEGR_CHECK(compressRecoveryMap(&map, &compressed_map));
 
-  JPEGR_CHECK(appendRecoveryMap(compressed_jpeg_image, &compressed_map, &metadata, dest));
+  // Extract EXIF from JPEG without decoding.
+  JpegDecoder jpeg_decoder;
+  if (!jpeg_decoder.extractEXIF(compressed_jpeg_image->data, compressed_jpeg_image->length)) {
+    return ERROR_JPEGR_DECODE_ERROR;
+  }
+
+  jpegr_exif_struct exif;
+  exif.data = nullptr;
+  exif.length = 0;
+  // Delete EXIF package if it appears, and update exif.
+  if (jpeg_decoder.getEXIFPos() != 0) {
+    int new_length = compressed_jpeg_image->length - jpeg_decoder.getEXIFSize() - 4;
+    memcpy((uint8_t*)compressed_jpeg_image->data + jpeg_decoder.getEXIFPos() - 4,
+           (uint8_t*)compressed_jpeg_image->data + jpeg_decoder.getEXIFPos()
+                  + jpeg_decoder.getEXIFSize(),
+           compressed_jpeg_image->length - jpeg_decoder.getEXIFPos() - jpeg_decoder.getEXIFSize());
+    compressed_jpeg_image->length = new_length;
+    exif.data = jpeg_decoder.getEXIFPtr();
+    exif.length = jpeg_decoder.getEXIFSize();
+  }
+
+  jpegr_exif_struct new_exif;
+  if (exif.data == nullptr) {
+      new_exif.length = PSEUDO_EXIF_PACKAGE_LENGTH;
+  } else {
+      new_exif.length = exif.length + EXIF_J_R_ENTRY_LENGTH;
+  }
+
+  new_exif.data = new uint8_t[new_exif.length];
+  std::unique_ptr<uint8_t[]> new_exif_data;
+  new_exif_data.reset(reinterpret_cast<uint8_t*>(new_exif.data));
+  JPEGR_CHECK(updateExif(&exif, &new_exif));
+
+  JPEGR_CHECK(appendRecoveryMap(
+          compressed_jpeg_image, &compressed_map, &new_exif, &metadata, dest));
 
   return NO_ERROR;
 }
 
+/* Encode API-3 */
 status_t RecoveryMap::encodeJPEGR(jr_uncompressed_ptr uncompressed_p010_image,
                                   jr_compressed_ptr compressed_jpeg_image,
                                   jpegr_transfer_function hdr_tf,
@@ -213,6 +421,32 @@
   uncompressed_yuv_420_image.height = jpeg_decoder.getDecompressedImageHeight();
   uncompressed_yuv_420_image.colorGamut = compressed_jpeg_image->colorGamut;
 
+  jpegr_exif_struct exif;
+  exif.data = nullptr;
+  exif.length = 0;
+  // Delete EXIF package if it appears, and update exif.
+  if (jpeg_decoder.getEXIFPos() != 0) {
+    int new_length = compressed_jpeg_image->length - jpeg_decoder.getEXIFSize() - 4;
+    memcpy((uint8_t*)compressed_jpeg_image->data + jpeg_decoder.getEXIFPos() - 4,
+           (uint8_t*)compressed_jpeg_image->data + jpeg_decoder.getEXIFPos()
+                  + jpeg_decoder.getEXIFSize(),
+           compressed_jpeg_image->length - jpeg_decoder.getEXIFPos() - jpeg_decoder.getEXIFSize());
+    compressed_jpeg_image->length = new_length;
+    exif.data = jpeg_decoder.getEXIFPtr();
+    exif.length = jpeg_decoder.getEXIFSize();
+  }
+
+  jpegr_exif_struct new_exif;
+  if (exif.data == nullptr) {
+      new_exif.length = PSEUDO_EXIF_PACKAGE_LENGTH;
+  } else {
+      new_exif.length = exif.length + EXIF_J_R_ENTRY_LENGTH;
+  }
+  new_exif.data = new uint8_t[new_exif.length];
+  std::unique_ptr<uint8_t[]> new_exif_data;
+  new_exif_data.reset(reinterpret_cast<uint8_t*>(new_exif.data));
+  JPEGR_CHECK(updateExif(&exif, &new_exif));
+
   if (uncompressed_p010_image->width != uncompressed_yuv_420_image.width
    || uncompressed_p010_image->height != uncompressed_yuv_420_image.height) {
     return ERROR_JPEGR_RESOLUTION_MISMATCH;
@@ -237,7 +471,8 @@
   compressed_map.data = compressed_map_data.get();
   JPEGR_CHECK(compressRecoveryMap(&map, &compressed_map));
 
-  JPEGR_CHECK(appendRecoveryMap(compressed_jpeg_image, &compressed_map, &metadata, dest));
+  JPEGR_CHECK(appendRecoveryMap(
+          compressed_jpeg_image, &compressed_map, &new_exif, &metadata, dest));
 
   return NO_ERROR;
 }
@@ -262,7 +497,7 @@
   return NO_ERROR;
 }
 
-
+/* Decode API */
 status_t RecoveryMap::decodeJPEGR(jr_compressed_ptr compressed_jpegr_image,
                                   jr_uncompressed_ptr dest,
                                   jr_exif_ptr exif,
@@ -278,14 +513,24 @@
   jpegr_metadata metadata;
   JPEGR_CHECK(extractRecoveryMap(compressed_jpegr_image, &compressed_map));
 
-  jpegr_uncompressed_struct map;
-  JPEGR_CHECK(decompressRecoveryMap(&compressed_map, &map));
 
   JpegDecoder jpeg_decoder;
   if (!jpeg_decoder.decompressImage(compressed_jpegr_image->data, compressed_jpegr_image->length)) {
     return ERROR_JPEGR_DECODE_ERROR;
   }
 
+  JpegDecoder recovery_map_decoder;
+  if (!recovery_map_decoder.decompressImage(compressed_map.data,
+                                    compressed_map.length)) {
+    return ERROR_JPEGR_DECODE_ERROR;
+  }
+
+  jpegr_uncompressed_struct map;
+  map.data = recovery_map_decoder.getDecompressedImagePtr();
+  map.width = recovery_map_decoder.getDecompressedImageWidth();
+  map.height = recovery_map_decoder.getDecompressedImageHeight();
+
+
   jpegr_uncompressed_struct uncompressed_yuv_420_image;
   uncompressed_yuv_420_image.data = jpeg_decoder.getDecompressedImagePtr();
   uncompressed_yuv_420_image.width = jpeg_decoder.getDecompressedImageWidth();
@@ -308,25 +553,6 @@
   return NO_ERROR;
 }
 
-status_t RecoveryMap::decompressRecoveryMap(jr_compressed_ptr compressed_recovery_map,
-                                            jr_uncompressed_ptr dest) {
-  if (compressed_recovery_map == nullptr || dest == nullptr) {
-    return ERROR_JPEGR_INVALID_NULL_PTR;
-  }
-
-  JpegDecoder jpeg_decoder;
-  if (!jpeg_decoder.decompressImage(compressed_recovery_map->data,
-                                    compressed_recovery_map->length)) {
-    return ERROR_JPEGR_DECODE_ERROR;
-  }
-
-  dest->data = jpeg_decoder.getDecompressedImagePtr();
-  dest->width = jpeg_decoder.getDecompressedImageWidth();
-  dest->height = jpeg_decoder.getDecompressedImageHeight();
-
-  return NO_ERROR;
-}
-
 status_t RecoveryMap::compressRecoveryMap(jr_uncompressed_ptr uncompressed_recovery_map,
                                           jr_compressed_ptr dest) {
   if (uncompressed_recovery_map == nullptr || dest == nullptr) {
@@ -392,6 +618,9 @@
   ColorTransformFn hdrInvOetf = nullptr;
   float hdr_white_nits = 0.0f;
   switch (metadata->transferFunction) {
+    case JPEGR_TF_LINEAR:
+      hdrInvOetf = identityConversion;
+      break;
     case JPEGR_TF_HLG:
       hdrInvOetf = hlgInvOetf;
       hdr_white_nits = kHlgMaxNits;
@@ -489,6 +718,9 @@
 
   ColorTransformFn hdrOetf = nullptr;
   switch (metadata->transferFunction) {
+    case JPEGR_TF_LINEAR:
+      hdrOetf = identityConversion;
+      break;
     case JPEGR_TF_HLG:
       hdrOetf = hlgOetf;
       break;
@@ -507,7 +739,7 @@
       float recovery = sampleMap(uncompressed_recovery_map, kMapDimensionScaleFactor, x, y);
       Color rgb_hdr = applyRecovery(rgb_sdr, recovery, metadata->rangeScalingFactor);
 
-      Color rgb_gamma_hdr = hdrOetf(rgb_hdr);
+      Color rgb_gamma_hdr = hdrOetf(rgb_hdr / metadata->rangeScalingFactor);
       uint32_t rgba1010102 = colorToRgba1010102(rgb_gamma_hdr);
 
       size_t pixel_idx =  x + y * width;
@@ -576,104 +808,101 @@
   return extractPrimaryImageAndRecoveryMap(compressed_jpegr_image, nullptr, dest);
 }
 
+// JPEG/R structure:
+// SOI (ff d8)
+// APP1 (ff e1)
+// 2 bytes of length (2 + length of exif package)
+// EXIF package (this includes the first two bytes representing the package length)
+// APP1 (ff e1)
+// 2 bytes of length (2 + 29 + length of xmp package)
+// name space ("http://ns.adobe.com/xap/1.0/\0")
+// xmp
+// primary image (without the first two bytes (SOI) and without EXIF, may have other packages)
+// secondary image (the recovery map)
+//
+// Metadata versions we are using:
+// ECMA TR-98 for JFIF marker
+// Exif 2.2 spec for EXIF marker
+// Adobe XMP spec part 3 for XMP marker
+// ICC v4.3 spec for ICC
 status_t RecoveryMap::appendRecoveryMap(jr_compressed_ptr compressed_jpeg_image,
                                         jr_compressed_ptr compressed_recovery_map,
+                                        jr_exif_ptr exif,
                                         jr_metadata_ptr metadata,
                                         jr_compressed_ptr dest) {
   if (compressed_jpeg_image == nullptr
    || compressed_recovery_map == nullptr
+   || exif == nullptr
    || metadata == nullptr
    || dest == nullptr) {
     return ERROR_JPEGR_INVALID_NULL_PTR;
   }
 
-  const string xmp = generateXmp(compressed_recovery_map->length, *metadata);
-  const string nameSpace = "http://ns.adobe.com/xap/1.0/\0";
-  const int nameSpaceLength = nameSpace.size() + 1;  // need to count the null terminator
-
-  // 2 bytes: APP1 sign (ff e1)
-  // 29 bytes: length of name space "http://ns.adobe.com/xap/1.0/\0",
-  // x bytes: length of xmp packet
-
-  const int length = 3 + nameSpaceLength + xmp.size();
-  const uint8_t lengthH = ((length >> 8) & 0xff);
-  const uint8_t lengthL = (length & 0xff);
-
   int pos = 0;
 
-  // JPEG/R structure:
-  // SOI (ff d8)
-  // APP1 (ff e1)
-  // 2 bytes of length (2 + 29 + length of xmp packet)
-  // name space ("http://ns.adobe.com/xap/1.0/\0")
-  // xmp
-  // primary image (without the first two bytes, the SOI sign)
-  // secondary image (the recovery map)
+  // Write SOI
   JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kStart, 1, pos));
   JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kSOI, 1, pos));
-  JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kStart, 1, pos));
-  JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kAPP1, 1, pos));
-  JPEGR_CHECK(Write(dest, &lengthH, 1, pos));
-  JPEGR_CHECK(Write(dest, &lengthL, 1, pos));
-  JPEGR_CHECK(Write(dest, (void*)nameSpace.c_str(), nameSpaceLength, pos));
-  JPEGR_CHECK(Write(dest, (void*)xmp.c_str(), xmp.size(), pos));
+
+  // Write EXIF
+  {
+    const int length = 2 + exif->length;
+    const uint8_t lengthH = ((length >> 8) & 0xff);
+    const uint8_t lengthL = (length & 0xff);
+    JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kStart, 1, pos));
+    JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kAPP1, 1, pos));
+    JPEGR_CHECK(Write(dest, &lengthH, 1, pos));
+    JPEGR_CHECK(Write(dest, &lengthL, 1, pos));
+    JPEGR_CHECK(Write(dest, exif->data, exif->length, pos));
+  }
+
+  // Prepare and write XMP
+  {
+    const string xmp = generateXmp(compressed_recovery_map->length, *metadata);
+    const string nameSpace = "http://ns.adobe.com/xap/1.0/\0";
+    const int nameSpaceLength = nameSpace.size() + 1;  // need to count the null terminator
+    // 2 bytes: representing the length of the package
+    // 29 bytes: length of name space "http://ns.adobe.com/xap/1.0/\0",
+    // x bytes: length of xmp packet
+    const int length = 3 + nameSpaceLength + xmp.size();
+    const uint8_t lengthH = ((length >> 8) & 0xff);
+    const uint8_t lengthL = (length & 0xff);
+    JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kStart, 1, pos));
+    JPEGR_CHECK(Write(dest, &photos_editing_formats::image_io::JpegMarker::kAPP1, 1, pos));
+    JPEGR_CHECK(Write(dest, &lengthH, 1, pos));
+    JPEGR_CHECK(Write(dest, &lengthL, 1, pos));
+    JPEGR_CHECK(Write(dest, (void*)nameSpace.c_str(), nameSpaceLength, pos));
+    JPEGR_CHECK(Write(dest, (void*)xmp.c_str(), xmp.size(), pos));
+  }
+
+  // Write primary image
   JPEGR_CHECK(Write(dest,
       (uint8_t*)compressed_jpeg_image->data + 2, compressed_jpeg_image->length - 2, pos));
+
+  // Write secondary image
   JPEGR_CHECK(Write(dest, compressed_recovery_map->data, compressed_recovery_map->length, pos));
+
+  // Set back length
   dest->length = pos;
 
+  // Done!
   return NO_ERROR;
 }
 
-string RecoveryMap::generateXmp(int secondary_image_length, jpegr_metadata& metadata) {
-  const string kContainerPrefix = "GContainer";
-  const string kContainerUri    = "http://ns.google.com/photos/1.0/container/";
-  const string kItemPrefix      = "Item";
-  const string kRecoveryMap     = "RecoveryMap";
-  const string kDirectory       = "Directory";
-  const string kImageJpeg       = "image/jpeg";
-  const string kItem            = "Item";
-  const string kLength          = "Length";
-  const string kMime            = "Mime";
-  const string kPrimary         = "Primary";
-  const string kSemantic        = "Semantic";
-  const string kVersion         = "Version";
+status_t RecoveryMap::toneMap(jr_uncompressed_ptr uncompressed_p010_image,
+                              jr_uncompressed_ptr dest) {
+  if (uncompressed_p010_image == nullptr || dest == nullptr) {
+    return ERROR_JPEGR_INVALID_NULL_PTR;
+  }
 
-  const string kConDir          = Name(kContainerPrefix, kDirectory);
-  const string kContainerItem   = Name(kContainerPrefix, kItem);
-  const string kItemLength      = Name(kItemPrefix, kLength);
-  const string kItemMime        = Name(kItemPrefix, kMime);
-  const string kItemSemantic    = Name(kItemPrefix, kSemantic);
+  dest->width = uncompressed_p010_image->width;
+  dest->height = uncompressed_p010_image->height;
+  unique_ptr<uint8_t[]> dest_data = make_unique<uint8_t[]>(dest->width * dest->height * 3 / 2);
+  dest->data = dest_data.get();
 
-  const vector<string> kConDirSeq({kConDir, string("rdf:Seq")});
-  const vector<string> kLiItem({string("rdf:li"), kContainerItem});
+  // TODO: Tone map algorighm here.
 
-  std::stringstream ss;
-  photos_editing_formats::image_io::XmlWriter writer(ss);
-  writer.StartWritingElement("x:xmpmeta");
-  writer.WriteXmlns("x", "adobe:ns:meta/");
-  writer.WriteAttributeNameAndValue("x:xmptk", "Adobe XMP Core 5.1.2");
-  writer.StartWritingElement("rdf:RDF");
-  writer.WriteXmlns("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
-  writer.StartWritingElement("rdf:Description");
-  writer.WriteXmlns(kContainerPrefix, kContainerUri);
-  writer.WriteElementAndContent(Name(kContainerPrefix, kVersion), metadata.version);
-  writer.WriteElementAndContent(Name(kContainerPrefix, "rangeScalingFactor"),
-                                metadata.rangeScalingFactor);
-  // TODO: determine structure for hdr10 metadata
-  // TODO: write rest of metadata
-  writer.StartWritingElements(kConDirSeq);
-  size_t item_depth = writer.StartWritingElements(kLiItem);
-  writer.WriteAttributeNameAndValue(kItemSemantic, kPrimary);
-  writer.WriteAttributeNameAndValue(kItemMime, kImageJpeg);
-  writer.FinishWritingElementsToDepth(item_depth);
-  writer.StartWritingElements(kLiItem);
-  writer.WriteAttributeNameAndValue(kItemSemantic, kRecoveryMap);
-  writer.WriteAttributeNameAndValue(kItemMime, kImageJpeg);
-  writer.WriteAttributeNameAndValue(kItemLength, secondary_image_length);
-  writer.FinishWriting();
-
-  return ss.str();
+  return NO_ERROR;
 }
 
 } // namespace android::recoverymap
diff --git a/libs/jpegrecoverymap/recoverymapmath.cpp b/libs/jpegrecoverymap/recoverymapmath.cpp
index e838f43..9ed2949 100644
--- a/libs/jpegrecoverymap/recoverymapmath.cpp
+++ b/libs/jpegrecoverymap/recoverymapmath.cpp
@@ -336,9 +336,9 @@
                   >> 6;
 
   // Conversions include taking narrow-range into account.
-  return {{{ static_cast<float>(y_uint) / 940.0f,
-             (static_cast<float>(u_uint) - 64.0f) / 940.0f - 0.5f,
-             (static_cast<float>(v_uint) - 64.0f) / 940.0f - 0.5f }}};
+  return {{{ (static_cast<float>(y_uint) - 64.0f) / 876.0f,
+             (static_cast<float>(u_uint) - 64.0f) / 896.0f - 0.5f,
+             (static_cast<float>(v_uint) - 64.0f) / 896.0f - 0.5f }}};
 }
 
 typedef Color (*getPixelFn)(jr_uncompressed_ptr, size_t, size_t);
diff --git a/libs/jpegrecoverymap/recoverymaputils.cpp b/libs/jpegrecoverymap/recoverymaputils.cpp
index fe46cba..63b25f7 100644
--- a/libs/jpegrecoverymap/recoverymaputils.cpp
+++ b/libs/jpegrecoverymap/recoverymaputils.cpp
@@ -17,26 +17,36 @@
 #include <jpegrecoverymap/recoverymaputils.h>
 #include <jpegrecoverymap/recoverymap.h>
 #include <image_io/xml/xml_reader.h>
+#include <image_io/xml/xml_writer.h>
 #include <image_io/base/message_handler.h>
 #include <image_io/xml/xml_element_rules.h>
 #include <image_io/xml/xml_handler.h>
 #include <image_io/xml/xml_rule.h>
 
-#include <string>
-#include <sstream>
-
 using namespace photos_editing_formats::image_io;
 using namespace std;
 
 namespace android::recoverymap {
 
+/*
+ * Helper function used for generating XMP metadata.
+ *
+ * @param prefix The prefix part of the name.
+ * @param suffix The suffix part of the name.
+ * @return A name of the form "prefix:suffix".
+ */
+string Name(const string &prefix, const string &suffix) {
+  std::stringstream ss;
+  ss << prefix << ":" << suffix;
+  return ss.str();
+}
 
 // Extremely simple XML Handler - just searches for interesting elements
 class XMPXmlHandler : public XmlHandler {
 public:
 
     XMPXmlHandler() : XmlHandler() {
-        rangeScalingFactorState = NotStrarted;
+        gContainerItemState = NotStrarted;
     }
 
     enum ParseState {
@@ -48,11 +58,11 @@
     virtual DataMatchResult StartElement(const XmlTokenContext& context) {
         string val;
         if (context.BuildTokenValue(&val)) {
-            if (!val.compare(rangeScalingFactorName)) {
-                rangeScalingFactorState = Started;
+            if (!val.compare(gContainerItemName)) {
+                gContainerItemState = Started;
             } else {
-                if (rangeScalingFactorState != Done) {
-                    rangeScalingFactorState = NotStrarted;
+                if (gContainerItemState != Done) {
+                    gContainerItemState = NotStrarted;
                 }
             }
         }
@@ -60,24 +70,45 @@
     }
 
     virtual DataMatchResult FinishElement(const XmlTokenContext& context) {
-        if (rangeScalingFactorState == Started) {
-            rangeScalingFactorState = Done;
+        if (gContainerItemState == Started) {
+            gContainerItemState = Done;
+            lastAttributeName = "";
         }
         return context.GetResult();
     }
 
-    virtual DataMatchResult ElementContent(const XmlTokenContext& context) {
+    virtual DataMatchResult AttributeName(const XmlTokenContext& context) {
         string val;
-        if (rangeScalingFactorState == Started) {
+        if (gContainerItemState == Started) {
             if (context.BuildTokenValue(&val)) {
-                rangeScalingFactorStr.assign(val);
+                if (!val.compare(rangeScalingFactorAttrName)) {
+                    lastAttributeName = rangeScalingFactorAttrName;
+                } else if (!val.compare(transferFunctionAttrName)) {
+                    lastAttributeName = transferFunctionAttrName;
+                } else {
+                    lastAttributeName = "";
+                }
+            }
+        }
+        return context.GetResult();
+    }
+
+    virtual DataMatchResult AttributeValue(const XmlTokenContext& context) {
+        string val;
+        if (gContainerItemState == Started) {
+            if (context.BuildTokenValue(&val, true)) {
+                if (!lastAttributeName.compare(rangeScalingFactorAttrName)) {
+                    rangeScalingFactorStr = val;
+                } else if (!lastAttributeName.compare(transferFunctionAttrName)) {
+                    transferFunctionStr = val;
+                }
             }
         }
         return context.GetResult();
     }
 
     bool getRangeScalingFactor(float* scaling_factor) {
-        if (rangeScalingFactorState == Done) {
+        if (gContainerItemState == Done) {
             stringstream ss(rangeScalingFactorStr);
             float val;
             if (ss >> val) {
@@ -92,19 +123,67 @@
     }
 
     bool getTransferFunction(jpegr_transfer_function* transfer_function) {
-        *transfer_function = JPEGR_TF_HLG;
+        if (gContainerItemState == Done) {
+            stringstream ss(transferFunctionStr);
+            int val;
+            if (ss >> val) {
+                *transfer_function = static_cast<jpegr_transfer_function>(val);
+                return true;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
         return true;
     }
 
 private:
-    static const string rangeScalingFactorName;
+    static const string gContainerItemName;
+    static const string rangeScalingFactorAttrName;
+    static const string transferFunctionAttrName;
     string              rangeScalingFactorStr;
-    ParseState          rangeScalingFactorState;
+    string              transferFunctionStr;
+    string              lastAttributeName;
+    ParseState          gContainerItemState;
 };
 
-const string XMPXmlHandler::rangeScalingFactorName = "GContainer:rangeScalingFactor";
+const string XMPXmlHandler::gContainerItemName = "GContainer:Item";
+const string XMPXmlHandler::rangeScalingFactorAttrName = "RecoveryMap:RangeScalingFactor";
+const string XMPXmlHandler::transferFunctionAttrName = "RecoveryMap:TransferFunction";
 
 
+const string kContainerPrefix   = "GContainer";
+const string kContainerUri      = "http://ns.google.com/photos/1.0/container/";
+const string kRecoveryMapUri    = "http://ns.google.com/photos/1.0/recoverymap/";
+const string kItemPrefix        = "Item";
+const string kRecoveryMap       = "RecoveryMap";
+const string kDirectory         = "Directory";
+const string kImageJpeg         = "image/jpeg";
+const string kItem              = "Item";
+const string kLength            = "Length";
+const string kMime              = "Mime";
+const string kPrimary           = "Primary";
+const string kSemantic          = "Semantic";
+const string kVersion           = "Version";
+const string kHdr10Metadata     = "HDR10Metadata";
+const string kSt2086Metadata    = "ST2086Metadata";
+const string kSt2086Coordinate  = "ST2086Coordinate";
+const string kSt2086CoordinateX = "ST2086CoordinateX";
+const string kSt2086CoordinateY = "ST2086CoordinateY";
+const string kSt2086Primary     = "ST2086Primary";
+const int kSt2086PrimaryRed     = 0;
+const int kSt2086PrimaryGreen   = 1;
+const int kSt2086PrimaryBlue    = 2;
+const int kSt2086PrimaryWhite   = 3;
+const int kGContainerVersion    = 1;
+
+const string kConDir            = Name(kContainerPrefix, kDirectory);
+const string kContainerItem     = Name(kContainerPrefix, kItem);
+const string kItemLength        = Name(kItemPrefix, kLength);
+const string kItemMime          = Name(kItemPrefix, kMime);
+const string kItemSemantic      = Name(kItemPrefix, kSemantic);
+
 bool getMetadataFromXMP(uint8_t* xmp_data, size_t xmp_size, jpegr_metadata* metadata) {
     string nameSpace = "http://ns.adobe.com/xap/1.0/\0";
 
@@ -150,4 +229,96 @@
     return true;
 }
 
+string generateXmp(int secondary_image_length, jpegr_metadata& metadata) {
+  const vector<string> kConDirSeq({kConDir, string("rdf:Seq")});
+  const vector<string> kLiItem({string("rdf:li"), kContainerItem});
+
+  std::stringstream ss;
+  photos_editing_formats::image_io::XmlWriter writer(ss);
+  writer.StartWritingElement("x:xmpmeta");
+  writer.WriteXmlns("x", "adobe:ns:meta/");
+  writer.WriteAttributeNameAndValue("x:xmptk", "Adobe XMP Core 5.1.2");
+  writer.StartWritingElement("rdf:RDF");
+  writer.WriteXmlns("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
+  writer.StartWritingElement("rdf:Description");
+  writer.WriteXmlns(kContainerPrefix, kContainerUri);
+  writer.WriteXmlns(kRecoveryMap, kRecoveryMapUri);
+  writer.WriteElementAndContent(Name(kContainerPrefix, kVersion), kGContainerVersion);
+  writer.StartWritingElements(kConDirSeq);
+  size_t item_depth = writer.StartWritingElements(kLiItem);
+  writer.WriteAttributeNameAndValue(kItemSemantic, kPrimary);
+  writer.WriteAttributeNameAndValue(kItemMime, kImageJpeg);
+  writer.WriteAttributeNameAndValue(Name(kRecoveryMap, kVersion), metadata.version);
+  writer.WriteAttributeNameAndValue(
+      Name(kRecoveryMap, "RangeScalingFactor"), metadata.rangeScalingFactor);
+  writer.WriteAttributeNameAndValue(
+      Name(kRecoveryMap, "TransferFunction"), metadata.transferFunction);
+  if (metadata.transferFunction == JPEGR_TF_PQ) {
+    writer.StartWritingElement(Name(kRecoveryMap, kHdr10Metadata));
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, "HDR10MaxFALL"), metadata.hdr10Metadata.maxFALL);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, "HDR10MaxCLL"), metadata.hdr10Metadata.maxCLL);
+    writer.StartWritingElement(Name(kRecoveryMap, kSt2086Metadata));
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, "ST2086MaxLuminance"),
+        metadata.hdr10Metadata.st2086Metadata.maxLuminance);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, "ST2086MinLuminance"),
+        metadata.hdr10Metadata.st2086Metadata.minLuminance);
+
+    // red
+    writer.StartWritingElement(Name(kRecoveryMap, kSt2086Coordinate));
+    writer.WriteAttributeNameAndValue(Name(kRecoveryMap, kSt2086Primary), kSt2086PrimaryRed);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateX),
+        metadata.hdr10Metadata.st2086Metadata.redPrimary.x);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateY),
+        metadata.hdr10Metadata.st2086Metadata.redPrimary.y);
+    writer.FinishWritingElement();
+
+    // green
+    writer.StartWritingElement(Name(kRecoveryMap, kSt2086Coordinate));
+    writer.WriteAttributeNameAndValue(Name(kRecoveryMap, kSt2086Primary), kSt2086PrimaryGreen);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateX),
+        metadata.hdr10Metadata.st2086Metadata.greenPrimary.x);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateY),
+        metadata.hdr10Metadata.st2086Metadata.greenPrimary.y);
+    writer.FinishWritingElement();
+
+    // blue
+    writer.StartWritingElement(Name(kRecoveryMap, kSt2086Coordinate));
+    writer.WriteAttributeNameAndValue(Name(kRecoveryMap, kSt2086Primary), kSt2086PrimaryBlue);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateX),
+        metadata.hdr10Metadata.st2086Metadata.bluePrimary.x);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateY),
+        metadata.hdr10Metadata.st2086Metadata.bluePrimary.y);
+    writer.FinishWritingElement();
+
+    // white
+    writer.StartWritingElement(Name(kRecoveryMap, kSt2086Coordinate));
+    writer.WriteAttributeNameAndValue(Name(kRecoveryMap, kSt2086Primary), kSt2086PrimaryWhite);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateX),
+        metadata.hdr10Metadata.st2086Metadata.whitePoint.x);
+    writer.WriteAttributeNameAndValue(
+        Name(kRecoveryMap, kSt2086CoordinateY),
+        metadata.hdr10Metadata.st2086Metadata.whitePoint.y);
+    writer.FinishWritingElement();
+  }
+  writer.FinishWritingElementsToDepth(item_depth);
+  writer.StartWritingElements(kLiItem);
+  writer.WriteAttributeNameAndValue(kItemSemantic, kRecoveryMap);
+  writer.WriteAttributeNameAndValue(kItemMime, kImageJpeg);
+  writer.WriteAttributeNameAndValue(kItemLength, secondary_image_length);
+  writer.FinishWriting();
+
+  return ss.str();
+}
+
 } // namespace android::recoverymap
\ No newline at end of file
diff --git a/libs/jpegrecoverymap/tests/data/raw_yuv420_image.yuv420 b/libs/jpegrecoverymap/tests/data/raw_yuv420_image.yuv420
new file mode 100644
index 0000000..c043da6
--- /dev/null
+++ b/libs/jpegrecoverymap/tests/data/raw_yuv420_image.yuv420
Binary files differ
diff --git a/libs/jpegrecoverymap/tests/recoverymap_test.cpp b/libs/jpegrecoverymap/tests/recoverymap_test.cpp
index ade33a0..c3c6fd4 100644
--- a/libs/jpegrecoverymap/tests/recoverymap_test.cpp
+++ b/libs/jpegrecoverymap/tests/recoverymap_test.cpp
@@ -15,15 +15,18 @@
  */
 
 #include <jpegrecoverymap/recoverymap.h>
+#include <jpegrecoverymap/recoverymaputils.h>
 #include <fcntl.h>
 #include <fstream>
 #include <gtest/gtest.h>
 #include <utils/Log.h>
 
 #define RAW_P010_IMAGE "/sdcard/Documents/raw_p010_image.p010"
-#define RAW_P010_IMAGE_WIDTH 1280
-#define RAW_P010_IMAGE_HEIGHT 720
+#define RAW_YUV420_IMAGE "/sdcard/Documents/raw_yuv420_image.yuv420"
 #define JPEG_IMAGE "/sdcard/Documents/jpeg_image.jpg"
+#define TEST_IMAGE_WIDTH 1280
+#define TEST_IMAGE_HEIGHT 720
+#define DEFAULT_JPEG_QUALITY 90
 
 #define SAVE_ENCODING_RESULT true
 #define SAVE_DECODING_RESULT true
@@ -39,6 +42,7 @@
   virtual void TearDown();
 
   struct jpegr_uncompressed_struct mRawP010Image;
+  struct jpegr_uncompressed_struct mRawYuv420Image;
   struct jpegr_compressed_struct mJpegImage;
 };
 
@@ -48,6 +52,7 @@
 void RecoveryMapTest::SetUp() {}
 void RecoveryMapTest::TearDown() {
   free(mRawP010Image.data);
+  free(mRawYuv420Image.data);
   free(mJpegImage.data);
 }
 
@@ -85,6 +90,7 @@
 TEST_F(RecoveryMapTest, build) {
   // Force all of the recovery map lib to be linked by calling all public functions.
   RecoveryMap recovery_map;
+  recovery_map.encodeJPEGR(nullptr, static_cast<jpegr_transfer_function>(0), nullptr, 0, nullptr);
   recovery_map.encodeJPEGR(nullptr, nullptr, static_cast<jpegr_transfer_function>(0),
                            nullptr, 0, nullptr);
   recovery_map.encodeJPEGR(nullptr, nullptr, nullptr, static_cast<jpegr_transfer_function>(0),
@@ -93,6 +99,201 @@
   recovery_map.decodeJPEGR(nullptr, nullptr, nullptr, false);
 }
 
+TEST_F(RecoveryMapTest, writeXmpThenRead) {
+  jpegr_metadata metadata_expected;
+  metadata_expected.transferFunction = JPEGR_TF_HLG;
+  metadata_expected.rangeScalingFactor = 1.25;
+  int length_expected = 1000;
+  std::string xmp = generateXmp(1000, metadata_expected);
+
+  jpegr_metadata metadata_read;
+  EXPECT_TRUE(getMetadataFromXMP(reinterpret_cast<uint8_t*>(xmp[0]), xmp.size(), &metadata_read));
+  ASSERT_EQ(metadata_expected.transferFunction, metadata_read.transferFunction);
+  ASSERT_EQ(metadata_expected.rangeScalingFactor, metadata_read.rangeScalingFactor);
+
+}
+
+/* Test Encode API-0 and decode */
+// TODO: enable when tonemapper is ready.
+//TEST_F(RecoveryMapTest, encodeFromP010ThenDecode) {
+//  int ret;
+//
+//  // Load input files.
+//  if (!loadFile(RAW_P010_IMAGE, mRawP010Image.data, nullptr)) {
+//    FAIL() << "Load file " << RAW_P010_IMAGE << " failed";
+//  }
+//  mRawP010Image.width = TEST_IMAGE_WIDTH;
+//  mRawP010Image.height = TEST_IMAGE_HEIGHT;
+//  mRawP010Image.colorGamut = jpegr_color_gamut::JPEGR_COLORGAMUT_BT2100;
+//
+//  RecoveryMap recoveryMap;
+//
+//  jpegr_compressed_struct jpegR;
+//  jpegR.maxLength = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * sizeof(uint8_t);
+//  jpegR.data = malloc(jpegR.maxLength);
+//  ret = recoveryMap.encodeJPEGR(
+//      &mRawP010Image, jpegr_transfer_function::JPEGR_TF_HLG, &jpegR, 90, nullptr);
+//  if (ret != OK) {
+//    FAIL() << "Error code is " << ret;
+//  }
+//  if (SAVE_ENCODING_RESULT) {
+//    // Output image data to file
+//    std::string filePath = "/sdcard/Documents/encoded_from_jpeg_input.jpgr";
+//    std::ofstream imageFile(filePath.c_str(), std::ofstream::binary);
+//    if (!imageFile.is_open()) {
+//      ALOGE("%s: Unable to create file %s", __FUNCTION__, filePath.c_str());
+//    }
+//    imageFile.write((const char*)jpegR.data, jpegR.length);
+//  }
+//
+//  jpegr_uncompressed_struct decodedJpegR;
+//  int decodedJpegRSize = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * 4;
+//  decodedJpegR.data = malloc(decodedJpegRSize);
+//  ret = recoveryMap.decodeJPEGR(&jpegR, &decodedJpegR);
+//  if (ret != OK) {
+//    FAIL() << "Error code is " << ret;
+//  }
+//  if (SAVE_DECODING_RESULT) {
+//    // Output image data to file
+//    std::string filePath = "/sdcard/Documents/decoded_from_jpeg_input.rgb10";
+//    std::ofstream imageFile(filePath.c_str(), std::ofstream::binary);
+//    if (!imageFile.is_open()) {
+//      ALOGE("%s: Unable to create file %s", __FUNCTION__, filePath.c_str());
+//    }
+//    imageFile.write((const char*)decodedJpegR.data, decodedJpegRSize);
+//  }
+//
+//  free(jpegR.data);
+//  free(decodedJpegR.data);
+//}
+
+/* Test Encode API-1 and decode */
+TEST_F(RecoveryMapTest, encodeFromRawHdrAndSdrThenDecode) {
+  int ret;
+
+  // Load input files.
+  if (!loadFile(RAW_P010_IMAGE, mRawP010Image.data, nullptr)) {
+    FAIL() << "Load file " << RAW_P010_IMAGE << " failed";
+  }
+  mRawP010Image.width = TEST_IMAGE_WIDTH;
+  mRawP010Image.height = TEST_IMAGE_HEIGHT;
+  mRawP010Image.colorGamut = jpegr_color_gamut::JPEGR_COLORGAMUT_BT2100;
+
+  if (!loadFile(RAW_YUV420_IMAGE, mRawYuv420Image.data, nullptr)) {
+    FAIL() << "Load file " << RAW_P010_IMAGE << " failed";
+  }
+  mRawYuv420Image.width = TEST_IMAGE_WIDTH;
+  mRawYuv420Image.height = TEST_IMAGE_HEIGHT;
+  mRawYuv420Image.colorGamut = jpegr_color_gamut::JPEGR_COLORGAMUT_BT709;
+
+  RecoveryMap recoveryMap;
+
+  jpegr_compressed_struct jpegR;
+  jpegR.maxLength = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * sizeof(uint8_t);
+  jpegR.data = malloc(jpegR.maxLength);
+  ret = recoveryMap.encodeJPEGR(
+      &mRawP010Image, &mRawYuv420Image, jpegr_transfer_function::JPEGR_TF_HLG, &jpegR,
+      DEFAULT_JPEG_QUALITY, nullptr);
+  if (ret != OK) {
+    FAIL() << "Error code is " << ret;
+  }
+  if (SAVE_ENCODING_RESULT) {
+    // Output image data to file
+    std::string filePath = "/sdcard/Documents/encoded_from_jpeg_input.jpgr";
+    std::ofstream imageFile(filePath.c_str(), std::ofstream::binary);
+    if (!imageFile.is_open()) {
+      ALOGE("%s: Unable to create file %s", __FUNCTION__, filePath.c_str());
+    }
+    imageFile.write((const char*)jpegR.data, jpegR.length);
+  }
+
+  jpegr_uncompressed_struct decodedJpegR;
+  int decodedJpegRSize = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * 4;
+  decodedJpegR.data = malloc(decodedJpegRSize);
+  ret = recoveryMap.decodeJPEGR(&jpegR, &decodedJpegR);
+  if (ret != OK) {
+    FAIL() << "Error code is " << ret;
+  }
+  if (SAVE_DECODING_RESULT) {
+    // Output image data to file
+    std::string filePath = "/sdcard/Documents/decoded_from_jpeg_input.rgb10";
+    std::ofstream imageFile(filePath.c_str(), std::ofstream::binary);
+    if (!imageFile.is_open()) {
+      ALOGE("%s: Unable to create file %s", __FUNCTION__, filePath.c_str());
+    }
+    imageFile.write((const char*)decodedJpegR.data, decodedJpegRSize);
+  }
+
+  free(jpegR.data);
+  free(decodedJpegR.data);
+}
+
+/* Test Encode API-2 and decode */
+TEST_F(RecoveryMapTest, encodeFromRawHdrAndSdrAndJpegThenDecode) {
+  int ret;
+
+  // Load input files.
+  if (!loadFile(RAW_P010_IMAGE, mRawP010Image.data, nullptr)) {
+    FAIL() << "Load file " << RAW_P010_IMAGE << " failed";
+  }
+  mRawP010Image.width = TEST_IMAGE_WIDTH;
+  mRawP010Image.height = TEST_IMAGE_HEIGHT;
+  mRawP010Image.colorGamut = jpegr_color_gamut::JPEGR_COLORGAMUT_BT2100;
+
+  if (!loadFile(RAW_YUV420_IMAGE, mRawYuv420Image.data, nullptr)) {
+    FAIL() << "Load file " << RAW_P010_IMAGE << " failed";
+  }
+  mRawYuv420Image.width = TEST_IMAGE_WIDTH;
+  mRawYuv420Image.height = TEST_IMAGE_HEIGHT;
+  mRawYuv420Image.colorGamut = jpegr_color_gamut::JPEGR_COLORGAMUT_BT709;
+
+  if (!loadFile(JPEG_IMAGE, mJpegImage.data, &mJpegImage.length)) {
+    FAIL() << "Load file " << JPEG_IMAGE << " failed";
+  }
+  mJpegImage.colorGamut = jpegr_color_gamut::JPEGR_COLORGAMUT_BT709;
+
+  RecoveryMap recoveryMap;
+
+  jpegr_compressed_struct jpegR;
+  jpegR.maxLength = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * sizeof(uint8_t);
+  jpegR.data = malloc(jpegR.maxLength);
+  ret = recoveryMap.encodeJPEGR(
+      &mRawP010Image, &mRawYuv420Image, &mJpegImage, jpegr_transfer_function::JPEGR_TF_HLG, &jpegR);
+  if (ret != OK) {
+    FAIL() << "Error code is " << ret;
+  }
+  if (SAVE_ENCODING_RESULT) {
+    // Output image data to file
+    std::string filePath = "/sdcard/Documents/encoded_from_jpeg_input.jpgr";
+    std::ofstream imageFile(filePath.c_str(), std::ofstream::binary);
+    if (!imageFile.is_open()) {
+      ALOGE("%s: Unable to create file %s", __FUNCTION__, filePath.c_str());
+    }
+    imageFile.write((const char*)jpegR.data, jpegR.length);
+  }
+
+  jpegr_uncompressed_struct decodedJpegR;
+  int decodedJpegRSize = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * 4;
+  decodedJpegR.data = malloc(decodedJpegRSize);
+  ret = recoveryMap.decodeJPEGR(&jpegR, &decodedJpegR);
+  if (ret != OK) {
+    FAIL() << "Error code is " << ret;
+  }
+  if (SAVE_DECODING_RESULT) {
+    // Output image data to file
+    std::string filePath = "/sdcard/Documents/decoded_from_jpeg_input.rgb10";
+    std::ofstream imageFile(filePath.c_str(), std::ofstream::binary);
+    if (!imageFile.is_open()) {
+      ALOGE("%s: Unable to create file %s", __FUNCTION__, filePath.c_str());
+    }
+    imageFile.write((const char*)decodedJpegR.data, decodedJpegRSize);
+  }
+
+  free(jpegR.data);
+  free(decodedJpegR.data);
+}
+
+/* Test Encode API-3 and decode */
 TEST_F(RecoveryMapTest, encodeFromJpegThenDecode) {
   int ret;
 
@@ -100,8 +301,8 @@
   if (!loadFile(RAW_P010_IMAGE, mRawP010Image.data, nullptr)) {
     FAIL() << "Load file " << RAW_P010_IMAGE << " failed";
   }
-  mRawP010Image.width = RAW_P010_IMAGE_WIDTH;
-  mRawP010Image.height = RAW_P010_IMAGE_HEIGHT;
+  mRawP010Image.width = TEST_IMAGE_WIDTH;
+  mRawP010Image.height = TEST_IMAGE_HEIGHT;
   mRawP010Image.colorGamut = jpegr_color_gamut::JPEGR_COLORGAMUT_BT2100;
 
   if (!loadFile(JPEG_IMAGE, mJpegImage.data, &mJpegImage.length)) {
@@ -112,7 +313,7 @@
   RecoveryMap recoveryMap;
 
   jpegr_compressed_struct jpegR;
-  jpegR.maxLength = RAW_P010_IMAGE_WIDTH * RAW_P010_IMAGE_HEIGHT * sizeof(uint8_t);
+  jpegR.maxLength = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * sizeof(uint8_t);
   jpegR.data = malloc(jpegR.maxLength);
   ret = recoveryMap.encodeJPEGR(
       &mRawP010Image, &mJpegImage, jpegr_transfer_function::JPEGR_TF_HLG, &jpegR);
@@ -130,7 +331,7 @@
   }
 
   jpegr_uncompressed_struct decodedJpegR;
-  int decodedJpegRSize = RAW_P010_IMAGE_WIDTH * RAW_P010_IMAGE_HEIGHT * 4;
+  int decodedJpegRSize = TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * 4;
   decodedJpegR.data = malloc(decodedJpegRSize);
   ret = recoveryMap.decodeJPEGR(&jpegR, &decodedJpegR);
   if (ret != OK) {
diff --git a/libs/jpegrecoverymap/tests/recoverymapmath_test.cpp b/libs/jpegrecoverymap/tests/recoverymapmath_test.cpp
index 169201c..f8dd490 100644
--- a/libs/jpegrecoverymap/tests/recoverymapmath_test.cpp
+++ b/libs/jpegrecoverymap/tests/recoverymapmath_test.cpp
@@ -36,9 +36,9 @@
   }
 
   Color P010(uint16_t y, uint16_t u, uint16_t v) {
-      return {{{ static_cast<float>(y) / 940.0f,
-                 (static_cast<float>(u) - 64.0f) / 940.0f - 0.5f,
-                 (static_cast<float>(v) - 64.0f) / 940.0f - 0.5f }}};
+      return {{{ (static_cast<float>(y) - 64.0f) / 876.0f,
+                 (static_cast<float>(u) - 64.0f) / 896.0f - 0.5f,
+                 (static_cast<float>(v) - 64.0f) / 896.0f - 0.5f }}};
   }
 
   float Map(uint8_t e) {
@@ -821,7 +821,6 @@
               bt2100Luminance(RgbBlue()) * kPqMaxNits, LuminanceEpsilon());
 }
 
-//Color Recover(Color yuv_gamma, float recovery, float range_scaling_factor) {
 TEST_F(RecoveryMapMathTest, ApplyMap) {
   EXPECT_RGB_EQ(Recover(YuvWhite(), 1.0f, 8.0f),
                 RgbWhite() * 8.0f);
diff --git a/libs/nativedisplay/AChoreographer.cpp b/libs/nativedisplay/AChoreographer.cpp
index e64165f..66a40f1 100644
--- a/libs/nativedisplay/AChoreographer.cpp
+++ b/libs/nativedisplay/AChoreographer.cpp
@@ -16,8 +16,8 @@
 
 #include <android-base/thread_annotations.h>
 #include <android/gui/ISurfaceComposer.h>
+#include <gui/Choreographer.h>
 #include <jni.h>
-#include <nativedisplay/Choreographer.h>
 #include <private/android/choreographer.h>
 #include <utils/Looper.h>
 #include <utils/Timers.h>
diff --git a/libs/nativedisplay/ADisplay.cpp b/libs/nativedisplay/ADisplay.cpp
index 60328e4..bf0805b 100644
--- a/libs/nativedisplay/ADisplay.cpp
+++ b/libs/nativedisplay/ADisplay.cpp
@@ -117,15 +117,6 @@
 #define CHECK_NOT_NULL(name) \
     LOG_ALWAYS_FATAL_IF(name == nullptr, "nullptr passed as " #name " argument");
 
-namespace {
-
-sp<IBinder> getToken(ADisplay* display) {
-    DisplayImpl* impl = reinterpret_cast<DisplayImpl*>(display);
-    return SurfaceComposerClient::getPhysicalDisplayToken(impl->id);
-}
-
-} // namespace
-
 namespace android {
 
 int ADisplay_acquirePhysicalDisplays(ADisplay*** outDisplays) {
@@ -139,10 +130,9 @@
     ui::DisplayConnectionType displayConnectionTypes[size];
     int numModes = 0;
     for (int i = 0; i < size; ++i) {
-        const sp<IBinder> token = SurfaceComposerClient::getPhysicalDisplayToken(ids[i]);
-
         ui::StaticDisplayInfo staticInfo;
-        if (const status_t status = SurfaceComposerClient::getStaticDisplayInfo(token, &staticInfo);
+        if (const status_t status =
+                    SurfaceComposerClient::getStaticDisplayInfo(ids[i].value, &staticInfo);
             status != OK) {
             return status;
         }
@@ -150,7 +140,7 @@
 
         ui::DynamicDisplayInfo dynamicInfo;
         if (const status_t status =
-                    SurfaceComposerClient::getDynamicDisplayInfo(token, &dynamicInfo);
+                    SurfaceComposerClient::getDynamicDisplayInfoFromId(ids[i].value, &dynamicInfo);
             status != OK) {
             return status;
         }
@@ -260,14 +250,15 @@
 int ADisplay_getCurrentConfig(ADisplay* display, ADisplayConfig** outConfig) {
     CHECK_NOT_NULL(display);
 
-    sp<IBinder> token = getToken(display);
     ui::DynamicDisplayInfo info;
-    if (const auto status = SurfaceComposerClient::getDynamicDisplayInfo(token, &info);
+    DisplayImpl* impl = reinterpret_cast<DisplayImpl*>(display);
+
+    if (const auto status =
+                SurfaceComposerClient::getDynamicDisplayInfoFromId(impl->id.value, &info);
         status != OK) {
         return status;
     }
 
-    DisplayImpl* impl = reinterpret_cast<DisplayImpl*>(display);
     for (size_t i = 0; i < impl->numConfigs; i++) {
         auto* config = impl->configs + i;
         if (config->id == info.activeDisplayModeId) {
diff --git a/libs/nativedisplay/Android.bp b/libs/nativedisplay/Android.bp
index 70de33d..8d8a2bc 100644
--- a/libs/nativedisplay/Android.bp
+++ b/libs/nativedisplay/Android.bp
@@ -56,7 +56,6 @@
         ":libgui_frame_event_aidl",
         "AChoreographer.cpp",
         "ADisplay.cpp",
-        "Choreographer.cpp",
         "surfacetexture/surface_texture.cpp",
         "surfacetexture/SurfaceTexture.cpp",
         "surfacetexture/ImageConsumer.cpp",
diff --git a/libs/nativewindow/AHardwareBuffer.cpp b/libs/nativewindow/AHardwareBuffer.cpp
index bbafbff..cf927db 100644
--- a/libs/nativewindow/AHardwareBuffer.cpp
+++ b/libs/nativewindow/AHardwareBuffer.cpp
@@ -617,15 +617,27 @@
     static_assert(static_cast<int>(aidl::android::hardware::graphics::common::PixelFormat::R_8) ==
                           AHARDWAREBUFFER_FORMAT_R8_UNORM,
             "HAL and AHardwareBuffer pixel format don't match");
+    static_assert(static_cast<int>(aidl::android::hardware::graphics::common::PixelFormat::R_16_UINT) ==
+                          AHARDWAREBUFFER_FORMAT_R16_UINT,
+            "HAL and AHardwareBuffer pixel format don't match");
+    static_assert(static_cast<int>(aidl::android::hardware::graphics::common::PixelFormat::RG_1616_UINT) ==
+                          AHARDWAREBUFFER_FORMAT_R16G16_UINT,
+            "HAL and AHardwareBuffer pixel format don't match");
+    static_assert(static_cast<int>(aidl::android::hardware::graphics::common::PixelFormat::RGBA_10101010) ==
+                          AHARDWAREBUFFER_FORMAT_R10G10B10A10_UNORM,
+            "HAL and AHardwareBuffer pixel format don't match");
 
     switch (format) {
         case AHARDWAREBUFFER_FORMAT_R8_UNORM:
+        case AHARDWAREBUFFER_FORMAT_R16_UINT:
+        case AHARDWAREBUFFER_FORMAT_R16G16_UINT:
         case AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM:
         case AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM:
         case AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM:
         case AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM:
         case AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT:
         case AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM:
+        case AHARDWAREBUFFER_FORMAT_R10G10B10A10_UNORM:
         case AHARDWAREBUFFER_FORMAT_BLOB:
         case AHARDWAREBUFFER_FORMAT_D16_UNORM:
         case AHARDWAREBUFFER_FORMAT_D24_UNORM:
@@ -677,6 +689,7 @@
           return 1;
       case AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM:
       case AHARDWAREBUFFER_FORMAT_D16_UNORM:
+      case AHARDWAREBUFFER_FORMAT_R16_UINT:
           return 2;
       case AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM:
       case AHARDWAREBUFFER_FORMAT_D24_UNORM:
@@ -686,8 +699,10 @@
       case AHARDWAREBUFFER_FORMAT_D32_FLOAT:
       case AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM:
       case AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT:
+      case AHARDWAREBUFFER_FORMAT_R16G16_UINT:
           return 4;
       case AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT:
+      case AHARDWAREBUFFER_FORMAT_R10G10B10A10_UNORM:
           return 8;
       default:
           return 0;
diff --git a/libs/nativewindow/ANativeWindow.cpp b/libs/nativewindow/ANativeWindow.cpp
index c345385..b7b2926 100644
--- a/libs/nativewindow/ANativeWindow.cpp
+++ b/libs/nativewindow/ANativeWindow.cpp
@@ -232,15 +232,6 @@
     return native_window_set_frame_rate(window, frameRate, compatibility, changeFrameRateStrategy);
 }
 
-int32_t ANativeWindow_clearFrameRate(ANativeWindow* window) {
-    if (!window || !query(window, NATIVE_WINDOW_IS_VALID)) {
-        return -EINVAL;
-    }
-    return native_window_set_frame_rate(window, 0,
-            ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_DEFAULT,
-            ANATIVEWINDOW_CHANGE_FRAME_RATE_ONLY_IF_SEAMLESS);
-}
-
 /**************************************************************************************************
  * vndk-stable
  **************************************************************************************************/
diff --git a/libs/nativewindow/include/android/hardware_buffer.h b/libs/nativewindow/include/android/hardware_buffer.h
index c35507b..b2e8bea 100644
--- a/libs/nativewindow/include/android/hardware_buffer.h
+++ b/libs/nativewindow/include/android/hardware_buffer.h
@@ -173,6 +173,27 @@
      *   OpenGL ES: GR_GL_R8
      */
     AHARDWAREBUFFER_FORMAT_R8_UNORM                 = 0x38,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R16_UINT
+     *   OpenGL ES: GR_GL_R16UI
+     */
+    AHARDWAREBUFFER_FORMAT_R16_UINT                 = 0x39,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R16G16_UINT
+     *   OpenGL ES: GR_GL_RG16UI
+     */
+    AHARDWAREBUFFER_FORMAT_R16G16_UINT              = 0x3a,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16
+     *   OpenGL ES: N/A
+     */
+    AHARDWAREBUFFER_FORMAT_R10G10B10A10_UNORM       = 0x3b,
 };
 
 /**
diff --git a/libs/nativewindow/include/android/native_window.h b/libs/nativewindow/include/android/native_window.h
index a27e3dd..be6623e 100644
--- a/libs/nativewindow/include/android/native_window.h
+++ b/libs/nativewindow/include/android/native_window.h
@@ -372,8 +372,12 @@
  *
  * \return 0 for success, -EINVAL if the window value is invalid.
  */
-int32_t ANativeWindow_clearFrameRate(ANativeWindow* window)
-        __INTRODUCED_IN(__ANDROID_API_U__);
+inline int32_t ANativeWindow_clearFrameRate(ANativeWindow* window)
+        __INTRODUCED_IN(__ANDROID_API_U__) {
+    return ANativeWindow_setFrameRateWithChangeStrategy(window, 0,
+            ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_DEFAULT,
+            ANATIVEWINDOW_CHANGE_FRAME_RATE_ONLY_IF_SEAMLESS);
+}
 
 #ifdef __cplusplus
 }
diff --git a/libs/nativewindow/libnativewindow.map.txt b/libs/nativewindow/libnativewindow.map.txt
index e1ee490..c2fd6ef 100644
--- a/libs/nativewindow/libnativewindow.map.txt
+++ b/libs/nativewindow/libnativewindow.map.txt
@@ -51,7 +51,6 @@
     ANativeWindow_setDequeueTimeout; # systemapi # introduced=30
     ANativeWindow_setFrameRate; # introduced=30
     ANativeWindow_setFrameRateWithChangeStrategy; # introduced=31
-    ANativeWindow_clearFrameRate; # introduced=UpsideDownCake
     ANativeWindow_setSharedBufferMode; # llndk
     ANativeWindow_setSwapInterval; # llndk
     ANativeWindow_setUsage; # llndk
diff --git a/libs/renderengine/Android.bp b/libs/renderengine/Android.bp
index 04e24ed..b8fd1b2 100644
--- a/libs/renderengine/Android.bp
+++ b/libs/renderengine/Android.bp
@@ -111,14 +111,30 @@
     ],
 }
 
+// Used to consolidate and simplify pulling Skia & Skia deps into targets that depend on
+// librenderengine. This allows shared deps to be deduplicated (e.g. Perfetto), which doesn't seem
+// possible if libskia_renderengine is just pulled into librenderengine via whole_static_libs.
+cc_defaults {
+    name: "librenderengine_deps",
+    defaults: ["skia_renderengine_deps"],
+    static_libs: ["libskia_renderengine"],
+}
+
+// Note: if compilation fails when adding librenderengine as a dependency, try adding
+// librenderengine_deps to the defaults field of your dependent target.
 cc_library_static {
     name: "librenderengine",
-    defaults: ["librenderengine_defaults"],
+    defaults: [
+        "librenderengine_defaults",
+        "librenderengine_deps",
+    ],
     double_loadable: true,
     cflags: [
         "-fvisibility=hidden",
         "-Werror=format",
         "-Wno-unused-parameter",
+        // TODO: Investigate reducing pinned-memory usage (b/263377839)
+        "-DRE_SKIAVK",
     ],
     srcs: [
         ":librenderengine_sources",
@@ -132,7 +148,6 @@
     include_dirs: [
         "external/skia/src/gpu",
     ],
-    whole_static_libs: ["libskia_renderengine"],
     lto: {
         thin: true,
     },
diff --git a/libs/renderengine/benchmark/Android.bp b/libs/renderengine/benchmark/Android.bp
index afbe6cf..55c34cd 100644
--- a/libs/renderengine/benchmark/Android.bp
+++ b/libs/renderengine/benchmark/Android.bp
@@ -25,7 +25,7 @@
     name: "librenderengine_bench",
     defaults: [
         "android.hardware.graphics.composer3-ndk_shared",
-        "skia_deps",
+        "librenderengine_deps",
         "surfaceflinger_defaults",
     ],
     srcs: [
diff --git a/libs/renderengine/tests/Android.bp b/libs/renderengine/tests/Android.bp
index 6f328d7..50e166d 100644
--- a/libs/renderengine/tests/Android.bp
+++ b/libs/renderengine/tests/Android.bp
@@ -25,7 +25,7 @@
     name: "librenderengine_test",
     defaults: [
         "android.hardware.graphics.composer3-ndk_shared",
-        "skia_deps",
+        "librenderengine_deps",
         "surfaceflinger_defaults",
     ],
     test_suites: ["device-tests"],
diff --git a/libs/sensor/Sensor.cpp b/libs/sensor/Sensor.cpp
index ec0ced8..fb895f5 100644
--- a/libs/sensor/Sensor.cpp
+++ b/libs/sensor/Sensor.cpp
@@ -264,10 +264,6 @@
         mStringType = SENSOR_STRING_TYPE_HEART_BEAT;
         mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE;
         break;
-
-    // TODO:  Placeholder for LLOB sensor type
-
-
     case SENSOR_TYPE_ACCELEROMETER_UNCALIBRATED:
         mStringType = SENSOR_STRING_TYPE_ACCELEROMETER_UNCALIBRATED;
         mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
diff --git a/libs/ui/PublicFormat.cpp b/libs/ui/PublicFormat.cpp
index 78e82da..c9663ed 100644
--- a/libs/ui/PublicFormat.cpp
+++ b/libs/ui/PublicFormat.cpp
@@ -14,14 +14,15 @@
  * limitations under the License.
  */
 
-#include <ui/GraphicTypes.h> // ui::Dataspace
+#include "aidl/android/hardware/graphics/common/Dataspace.h"
 #include <ui/PublicFormat.h>
 
+
 // ----------------------------------------------------------------------------
 namespace android {
 // ----------------------------------------------------------------------------
 
-using ui::Dataspace;
+using ::aidl::android::hardware::graphics::common::Dataspace;
 
 int mapPublicFormatToHalFormat(PublicFormat f) {
     switch (f) {
@@ -29,6 +30,7 @@
         case PublicFormat::DEPTH_POINT_CLOUD:
         case PublicFormat::DEPTH_JPEG:
         case PublicFormat::HEIC:
+        case PublicFormat::JPEG_R:
             return HAL_PIXEL_FORMAT_BLOB;
         case PublicFormat::DEPTH16:
             return HAL_PIXEL_FORMAT_Y16;
@@ -47,7 +49,7 @@
     Dataspace dataspace;
     switch (f) {
         case PublicFormat::JPEG:
-            dataspace = Dataspace::V0_JFIF;
+            dataspace = Dataspace::JFIF;
             break;
         case PublicFormat::DEPTH_POINT_CLOUD:
         case PublicFormat::DEPTH16:
@@ -64,7 +66,7 @@
         case PublicFormat::YUV_420_888:
         case PublicFormat::NV21:
         case PublicFormat::YV12:
-            dataspace = Dataspace::V0_JFIF;
+            dataspace = Dataspace::JFIF;
             break;
         case PublicFormat::DEPTH_JPEG:
             dataspace = Dataspace::DYNAMIC_DEPTH;
@@ -72,6 +74,9 @@
         case PublicFormat::HEIC:
             dataspace = Dataspace::HEIF;
             break;
+        case PublicFormat::JPEG_R:
+            dataspace = Dataspace::JPEG_R;
+            break;
         default:
             // Most formats map to UNKNOWN
             dataspace = Dataspace::UNKNOWN;
@@ -139,14 +144,16 @@
             switch (ds) {
                 case Dataspace::DEPTH:
                     return PublicFormat::DEPTH_POINT_CLOUD;
-                case Dataspace::V0_JFIF:
+                case Dataspace::JFIF:
                     return PublicFormat::JPEG;
                 case Dataspace::HEIF:
                     return PublicFormat::HEIC;
                 default:
                     if (dataSpace == static_cast<android_dataspace>(HAL_DATASPACE_DYNAMIC_DEPTH)) {
                         return PublicFormat::DEPTH_JPEG;
-                    } else {
+                    } else if (dataSpace == static_cast<android_dataspace>(Dataspace::JPEG_R)) {
+                        return PublicFormat::JPEG_R;
+                    }else {
                         // Assume otherwise-marked blobs are also JPEG
                         return PublicFormat::JPEG;
                     }
diff --git a/libs/ui/include/ui/PixelFormat.h b/libs/ui/include/ui/PixelFormat.h
index f422ce4..cf5c2e8 100644
--- a/libs/ui/include/ui/PixelFormat.h
+++ b/libs/ui/include/ui/PixelFormat.h
@@ -53,16 +53,19 @@
 
     // real pixel formats supported for rendering -----------------------------
 
-    PIXEL_FORMAT_RGBA_8888    = HAL_PIXEL_FORMAT_RGBA_8888,    // 4x8-bit RGBA
-    PIXEL_FORMAT_RGBX_8888    = HAL_PIXEL_FORMAT_RGBX_8888,    // 4x8-bit RGB0
-    PIXEL_FORMAT_RGB_888      = HAL_PIXEL_FORMAT_RGB_888,      // 3x8-bit RGB
-    PIXEL_FORMAT_RGB_565      = HAL_PIXEL_FORMAT_RGB_565,      // 16-bit RGB
-    PIXEL_FORMAT_BGRA_8888    = HAL_PIXEL_FORMAT_BGRA_8888,    // 4x8-bit BGRA
-    PIXEL_FORMAT_RGBA_5551    = 6,                             // 16-bit ARGB
-    PIXEL_FORMAT_RGBA_4444    = 7,                             // 16-bit ARGB
-    PIXEL_FORMAT_RGBA_FP16    = HAL_PIXEL_FORMAT_RGBA_FP16,    // 64-bit RGBA
-    PIXEL_FORMAT_RGBA_1010102 = HAL_PIXEL_FORMAT_RGBA_1010102, // 32-bit RGBA
-    PIXEL_FORMAT_R_8          = 0x38,
+    PIXEL_FORMAT_RGBA_8888     = HAL_PIXEL_FORMAT_RGBA_8888,    // 4x8-bit RGBA
+    PIXEL_FORMAT_RGBX_8888     = HAL_PIXEL_FORMAT_RGBX_8888,    // 4x8-bit RGB0
+    PIXEL_FORMAT_RGB_888       = HAL_PIXEL_FORMAT_RGB_888,      // 3x8-bit RGB
+    PIXEL_FORMAT_RGB_565       = HAL_PIXEL_FORMAT_RGB_565,      // 16-bit RGB
+    PIXEL_FORMAT_BGRA_8888     = HAL_PIXEL_FORMAT_BGRA_8888,    // 4x8-bit BGRA
+    PIXEL_FORMAT_RGBA_5551     = 6,                             // 16-bit ARGB
+    PIXEL_FORMAT_RGBA_4444     = 7,                             // 16-bit ARGB
+    PIXEL_FORMAT_RGBA_FP16     = HAL_PIXEL_FORMAT_RGBA_FP16,    // 64-bit RGBA
+    PIXEL_FORMAT_RGBA_1010102  = HAL_PIXEL_FORMAT_RGBA_1010102, // 32-bit RGBA
+    PIXEL_FORMAT_R_8           = 0x38,
+    PIXEL_FORMAT_R_16_UINT     = 0x39,
+    PIXEL_FORMAT_RG_1616_UINT  = 0x3a,
+    PIXEL_FORMAT_RGBA_10101010 = 0x3b,
 };
 
 typedef int32_t PixelFormat;
diff --git a/libs/ui/include/ui/PublicFormat.h b/libs/ui/include/ui/PublicFormat.h
index aa58805..2248cca 100644
--- a/libs/ui/include/ui/PublicFormat.h
+++ b/libs/ui/include/ui/PublicFormat.h
@@ -57,6 +57,7 @@
     YCBCR_P010 = 0x36,
     DEPTH16 = 0x44363159,
     DEPTH_JPEG = 0x69656963,
+    JPEG_R = 0x1005,
     HEIC = 0x48454946,
 };
 
diff --git a/libs/ui/include_types/ui/DataspaceUtils.h b/libs/ui/include_types/ui/DataspaceUtils.h
index a461cb4..cd31167 100644
--- a/libs/ui/include_types/ui/DataspaceUtils.h
+++ b/libs/ui/include_types/ui/DataspaceUtils.h
@@ -22,8 +22,10 @@
 
 inline bool isHdrDataspace(ui::Dataspace dataspace) {
     const auto transfer = dataspace & HAL_DATASPACE_TRANSFER_MASK;
+    const auto range = dataspace & HAL_DATASPACE_RANGE_MASK;
 
-    return transfer == HAL_DATASPACE_TRANSFER_ST2084 || transfer == HAL_DATASPACE_TRANSFER_HLG;
+    return transfer == HAL_DATASPACE_TRANSFER_ST2084 || transfer == HAL_DATASPACE_TRANSFER_HLG ||
+            range == HAL_DATASPACE_RANGE_EXTENDED;
 }
 
-} // namespace android
\ No newline at end of file
+} // namespace android
diff --git a/libs/ui/tests/DataspaceUtils_test.cpp b/libs/ui/tests/DataspaceUtils_test.cpp
index 3e09671..ffe6438 100644
--- a/libs/ui/tests/DataspaceUtils_test.cpp
+++ b/libs/ui/tests/DataspaceUtils_test.cpp
@@ -29,12 +29,13 @@
     EXPECT_TRUE(isHdrDataspace(ui::Dataspace::BT2020_ITU_PQ));
     EXPECT_TRUE(isHdrDataspace(ui::Dataspace::BT2020_PQ));
     EXPECT_TRUE(isHdrDataspace(ui::Dataspace::BT2020_HLG));
+    // The original formulation of scRGB indicates the same white points as that
+    // of sRGB, however scRGB may be used to implement HDR.
+    EXPECT_TRUE(isHdrDataspace(ui::Dataspace::V0_SCRGB_LINEAR));
+    EXPECT_TRUE(isHdrDataspace(ui::Dataspace::V0_SCRGB));
 
     EXPECT_FALSE(isHdrDataspace(ui::Dataspace::V0_SRGB_LINEAR));
-    // scRGB defines a very wide gamut but not an expanded luminance range
-    EXPECT_FALSE(isHdrDataspace(ui::Dataspace::V0_SCRGB_LINEAR));
     EXPECT_FALSE(isHdrDataspace(ui::Dataspace::V0_SRGB));
-    EXPECT_FALSE(isHdrDataspace(ui::Dataspace::V0_SCRGB));
     EXPECT_FALSE(isHdrDataspace(ui::Dataspace::V0_JFIF));
     EXPECT_FALSE(isHdrDataspace(ui::Dataspace::V0_BT601_625));
     EXPECT_FALSE(isHdrDataspace(ui::Dataspace::V0_BT601_525));
diff --git a/opengl/TEST_MAPPING b/opengl/TEST_MAPPING
index d391dce..7c50a94 100644
--- a/opengl/TEST_MAPPING
+++ b/opengl/TEST_MAPPING
@@ -2,6 +2,9 @@
   "presubmit": [
     {
       "name": "CtsGpuToolsHostTestCases"
+    },
+    {
+      "name": "EGL_test"
     }
   ]
 }
diff --git a/opengl/libs/Android.bp b/opengl/libs/Android.bp
index 62cf255..750338b 100644
--- a/opengl/libs/Android.bp
+++ b/opengl/libs/Android.bp
@@ -160,6 +160,7 @@
     srcs: [
         "EGL/egl_tls.cpp",
         "EGL/egl_cache.cpp",
+        "EGL/egl_cache_multifile.cpp",
         "EGL/egl_display.cpp",
         "EGL/egl_object.cpp",
         "EGL/egl_layers.cpp",
diff --git a/opengl/libs/EGL/FileBlobCache.cpp b/opengl/libs/EGL/FileBlobCache.cpp
index 751f3be..3f7ae7e 100644
--- a/opengl/libs/EGL/FileBlobCache.cpp
+++ b/opengl/libs/EGL/FileBlobCache.cpp
@@ -185,4 +185,10 @@
     }
 }
 
+size_t FileBlobCache::getSize() {
+    if (mFilename.length() > 0) {
+        return getFlattenedSize() + cacheFileHeaderSize;
+    }
+    return 0;
+}
 }
diff --git a/opengl/libs/EGL/FileBlobCache.h b/opengl/libs/EGL/FileBlobCache.h
index 393703f..8220723 100644
--- a/opengl/libs/EGL/FileBlobCache.h
+++ b/opengl/libs/EGL/FileBlobCache.h
@@ -33,6 +33,9 @@
     // disk.
     void writeToFile();
 
+    // Return the total size of the cache
+    size_t getSize();
+
 private:
     // mFilename is the name of the file for storing cache contents.
     std::string mFilename;
diff --git a/opengl/libs/EGL/egl_cache.cpp b/opengl/libs/EGL/egl_cache.cpp
index 8348d6c..5597944 100644
--- a/opengl/libs/EGL/egl_cache.cpp
+++ b/opengl/libs/EGL/egl_cache.cpp
@@ -16,6 +16,8 @@
 
 #include "egl_cache.h"
 
+#include <android-base/properties.h>
+#include <inttypes.h>
 #include <log/log.h>
 #include <private/EGL/cache.h>
 #include <unistd.h>
@@ -23,16 +25,23 @@
 #include <thread>
 
 #include "../egl_impl.h"
+#include "egl_cache_multifile.h"
 #include "egl_display.h"
 
-// Cache size limits.
+// Monolithic cache size limits.
 static const size_t maxKeySize = 12 * 1024;
 static const size_t maxValueSize = 64 * 1024;
 static const size_t maxTotalSize = 32 * 1024 * 1024;
 
-// The time in seconds to wait before saving newly inserted cache entries.
+// The time in seconds to wait before saving newly inserted monolithic cache entries.
 static const unsigned int deferredSaveDelay = 4;
 
+// Multifile cache size limit
+constexpr size_t kMultifileCacheByteLimit = 64 * 1024 * 1024;
+
+// Delay before cleaning up multifile cache entries
+static const unsigned int deferredMultifileCleanupDelaySeconds = 1;
+
 namespace android {
 
 #define BC_EXT_STR "EGL_ANDROID_blob_cache"
@@ -58,7 +67,11 @@
 //
 // egl_cache_t definition
 //
-egl_cache_t::egl_cache_t() : mInitialized(false) {}
+egl_cache_t::egl_cache_t()
+      : mInitialized(false),
+        mMultifileMode(true),
+        mCacheByteLimit(maxTotalSize),
+        mMultifileCleanupPending(false) {}
 
 egl_cache_t::~egl_cache_t() {}
 
@@ -101,6 +114,18 @@
         }
     }
 
+    mMultifileMode = true;
+
+    // Allow forcing monolithic cache for debug purposes
+    if (base::GetProperty("debug.egl.blobcache.multifilemode", "") == "false") {
+        ALOGD("Forcing monolithic cache due to debug.egl.blobcache.multifilemode == \"false\"");
+        mMultifileMode = false;
+    }
+
+    if (mMultifileMode) {
+        mCacheByteLimit = kMultifileCacheByteLimit;
+    }
+
     mInitialized = true;
 }
 
@@ -110,6 +135,11 @@
         mBlobCache->writeToFile();
     }
     mBlobCache = nullptr;
+    if (mMultifileMode) {
+        checkMultifileCacheSize(mCacheByteLimit);
+    }
+    mMultifileMode = false;
+    mInitialized = false;
 }
 
 void egl_cache_t::setBlob(const void* key, EGLsizeiANDROID keySize, const void* value,
@@ -122,20 +152,37 @@
     }
 
     if (mInitialized) {
-        BlobCache* bc = getBlobCacheLocked();
-        bc->set(key, keySize, value, valueSize);
+        if (mMultifileMode) {
+            setBlobMultifile(key, keySize, value, valueSize, mFilename);
 
-        if (!mSavePending) {
-            mSavePending = true;
-            std::thread deferredSaveThread([this]() {
-                sleep(deferredSaveDelay);
-                std::lock_guard<std::mutex> lock(mMutex);
-                if (mInitialized && mBlobCache) {
-                    mBlobCache->writeToFile();
-                }
-                mSavePending = false;
-            });
-            deferredSaveThread.detach();
+            if (!mMultifileCleanupPending) {
+                mMultifileCleanupPending = true;
+                // Kick off a thread to cull cache files below limit
+                std::thread deferredMultifileCleanupThread([this]() {
+                    sleep(deferredMultifileCleanupDelaySeconds);
+                    std::lock_guard<std::mutex> lock(mMutex);
+                    // Check the size of cache and remove entries to stay under limit
+                    checkMultifileCacheSize(mCacheByteLimit);
+                    mMultifileCleanupPending = false;
+                });
+                deferredMultifileCleanupThread.detach();
+            }
+        } else {
+            BlobCache* bc = getBlobCacheLocked();
+            bc->set(key, keySize, value, valueSize);
+
+            if (!mSavePending) {
+                mSavePending = true;
+                std::thread deferredSaveThread([this]() {
+                    sleep(deferredSaveDelay);
+                    std::lock_guard<std::mutex> lock(mMutex);
+                    if (mInitialized && mBlobCache) {
+                        mBlobCache->writeToFile();
+                    }
+                    mSavePending = false;
+                });
+                deferredSaveThread.detach();
+            }
         }
     }
 }
@@ -145,13 +192,17 @@
     std::lock_guard<std::mutex> lock(mMutex);
 
     if (keySize < 0 || valueSize < 0) {
-        ALOGW("EGL_ANDROID_blob_cache set: negative sizes are not allowed");
+        ALOGW("EGL_ANDROID_blob_cache get: negative sizes are not allowed");
         return 0;
     }
 
     if (mInitialized) {
-        BlobCache* bc = getBlobCacheLocked();
-        return bc->get(key, keySize, value, valueSize);
+        if (mMultifileMode) {
+            return getBlobMultifile(key, keySize, value, valueSize, mFilename);
+        } else {
+            BlobCache* bc = getBlobCacheLocked();
+            return bc->get(key, keySize, value, valueSize);
+        }
     }
     return 0;
 }
@@ -161,9 +212,34 @@
     mFilename = filename;
 }
 
+void egl_cache_t::setCacheLimit(int64_t cacheByteLimit) {
+    std::lock_guard<std::mutex> lock(mMutex);
+
+    if (!mMultifileMode) {
+        // If we're not in multifile mode, ensure the cache limit is only being lowered,
+        // not increasing above the hard coded platform limit
+        if (cacheByteLimit > maxTotalSize) {
+            return;
+        }
+    }
+
+    mCacheByteLimit = cacheByteLimit;
+}
+
+size_t egl_cache_t::getCacheSize() {
+    std::lock_guard<std::mutex> lock(mMutex);
+    if (mMultifileMode) {
+        return getMultifileCacheSize();
+    }
+    if (mBlobCache) {
+        return mBlobCache->getSize();
+    }
+    return 0;
+}
+
 BlobCache* egl_cache_t::getBlobCacheLocked() {
     if (mBlobCache == nullptr) {
-        mBlobCache.reset(new FileBlobCache(maxKeySize, maxValueSize, maxTotalSize, mFilename));
+        mBlobCache.reset(new FileBlobCache(maxKeySize, maxValueSize, mCacheByteLimit, mFilename));
     }
     return mBlobCache.get();
 }
diff --git a/opengl/libs/EGL/egl_cache.h b/opengl/libs/EGL/egl_cache.h
index d10a615..2dcd803 100644
--- a/opengl/libs/EGL/egl_cache.h
+++ b/opengl/libs/EGL/egl_cache.h
@@ -64,6 +64,12 @@
     // cache contents from one program invocation to another.
     void setCacheFilename(const char* filename);
 
+    // Allow the fixed cache limit to be overridden
+    void setCacheLimit(int64_t cacheByteLimit);
+
+    // Return the byte total for cache file(s)
+    size_t getCacheSize();
+
 private:
     // Creation and (the lack of) destruction is handled internally.
     egl_cache_t();
@@ -112,6 +118,16 @@
 
     // sCache is the singleton egl_cache_t object.
     static egl_cache_t sCache;
+
+    // Whether to use multiple files to store cache entries
+    bool mMultifileMode;
+
+    // Cache limit
+    int64_t mCacheByteLimit;
+
+    // Whether we've kicked off a side thread that will check the multifile
+    // cache size and remove entries if needed.
+    bool mMultifileCleanupPending;
 };
 
 }; // namespace android
diff --git a/opengl/libs/EGL/egl_cache_multifile.cpp b/opengl/libs/EGL/egl_cache_multifile.cpp
new file mode 100644
index 0000000..48e557f
--- /dev/null
+++ b/opengl/libs/EGL/egl_cache_multifile.cpp
@@ -0,0 +1,343 @@
+/*
+ ** Copyright 2022, The Android Open Source Project
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ **
+ **     http://www.apache.org/licenses/LICENSE-2.0
+ **
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ */
+
+// #define LOG_NDEBUG 0
+
+#include "egl_cache_multifile.h"
+
+#include <android-base/properties.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <log/log.h>
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <utime.h>
+
+#include <algorithm>
+#include <chrono>
+#include <fstream>
+#include <limits>
+#include <locale>
+#include <map>
+#include <sstream>
+#include <unordered_map>
+
+#include <utils/JenkinsHash.h>
+
+static std::string multifileDirName = "";
+
+using namespace std::literals;
+
+namespace {
+
+// Create a directory for tracking multiple files
+void setupMultifile(const std::string& baseDir) {
+    // If we've already set up the multifile dir in this base directory, we're done
+    if (!multifileDirName.empty() && multifileDirName.find(baseDir) != std::string::npos) {
+        return;
+    }
+
+    // Otherwise, create it
+    multifileDirName = baseDir + ".multifile";
+    if (mkdir(multifileDirName.c_str(), 0755) != 0 && (errno != EEXIST)) {
+        ALOGW("Unable to create directory (%s), errno (%i)", multifileDirName.c_str(), errno);
+    }
+}
+
+// Create a filename that is based on the hash of the key
+std::string getCacheEntryFilename(const void* key, EGLsizeiANDROID keySize,
+                                  const std::string& baseDir) {
+    // Hash the key into a string
+    std::stringstream keyName;
+    keyName << android::JenkinsHashMixBytes(0, static_cast<const uint8_t*>(key), keySize);
+
+    // Build a filename using dir and hash
+    return baseDir + "/" + keyName.str();
+}
+
+// Determine file age based on stat modification time
+// Newer files have a higher age (time since epoch)
+time_t getFileAge(const std::string& filePath) {
+    struct stat st;
+    if (stat(filePath.c_str(), &st) == 0) {
+        ALOGD("getFileAge returning %" PRId64 " for file age", static_cast<uint64_t>(st.st_mtime));
+        return st.st_mtime;
+    } else {
+        ALOGW("Failed to stat %s", filePath.c_str());
+        return 0;
+    }
+}
+
+size_t getFileSize(const std::string& filePath) {
+    struct stat st;
+    if (stat(filePath.c_str(), &st) != 0) {
+        ALOGE("Unable to stat %s", filePath.c_str());
+        return 0;
+    }
+    return st.st_size;
+}
+
+// Walk through directory entries and track age and size
+// Then iterate through the entries, oldest first, and remove them until under the limit.
+// This will need to be updated if we move to a multilevel cache dir.
+bool applyLRU(size_t cacheLimit) {
+    // Build a multimap of files indexed by age.
+    // They will be automatically sorted smallest (oldest) to largest (newest)
+    std::multimap<time_t, std::string> agesToFiles;
+
+    // Map files to sizes
+    std::unordered_map<std::string, size_t> filesToSizes;
+
+    size_t totalCacheSize = 0;
+
+    DIR* dir;
+    struct dirent* entry;
+    if ((dir = opendir(multifileDirName.c_str())) != nullptr) {
+        while ((entry = readdir(dir)) != nullptr) {
+            if (entry->d_name == "."s || entry->d_name == ".."s) {
+                continue;
+            }
+
+            // Look up each file age
+            std::string fullPath = multifileDirName + "/" + entry->d_name;
+            time_t fileAge = getFileAge(fullPath);
+
+            // Track the files, sorted by age
+            agesToFiles.insert(std::make_pair(fileAge, fullPath));
+
+            // Also track the size so we know how much room we have freed
+            size_t fileSize = getFileSize(fullPath);
+            filesToSizes[fullPath] = fileSize;
+            totalCacheSize += fileSize;
+        }
+        closedir(dir);
+    } else {
+        ALOGE("Unable to open filename: %s", multifileDirName.c_str());
+        return false;
+    }
+
+    if (totalCacheSize <= cacheLimit) {
+        // If LRU was called on a sufficiently small cache, no need to remove anything
+        return true;
+    }
+
+    // Walk through the map of files until we're under the cache size
+    for (const auto& cacheEntryIter : agesToFiles) {
+        time_t entryAge = cacheEntryIter.first;
+        const std::string entryPath = cacheEntryIter.second;
+
+        ALOGD("Removing %s with age %ld", entryPath.c_str(), entryAge);
+        if (std::remove(entryPath.c_str()) != 0) {
+            ALOGE("Error removing %s: %s", entryPath.c_str(), std::strerror(errno));
+            return false;
+        }
+
+        totalCacheSize -= filesToSizes[entryPath];
+        if (totalCacheSize <= cacheLimit) {
+            // Success
+            ALOGV("Reduced cache to %zu", totalCacheSize);
+            return true;
+        } else {
+            ALOGD("Cache size is still too large (%zu), removing more files", totalCacheSize);
+        }
+    }
+
+    // Should never reach this return
+    return false;
+}
+
+} // namespace
+
+namespace android {
+
+void setBlobMultifile(const void* key, EGLsizeiANDROID keySize, const void* value,
+                      EGLsizeiANDROID valueSize, const std::string& baseDir) {
+    if (baseDir.empty()) {
+        return;
+    }
+
+    setupMultifile(baseDir);
+    std::string filename = getCacheEntryFilename(key, keySize, multifileDirName);
+
+    ALOGD("Attempting to open filename for set: %s", filename.c_str());
+    std::ofstream outfile(filename, std::ofstream::binary);
+    if (outfile.fail()) {
+        ALOGW("Unable to open filename: %s", filename.c_str());
+        return;
+    }
+
+    // First write the key
+    outfile.write(static_cast<const char*>(key), keySize);
+    if (outfile.bad()) {
+        ALOGW("Unable to write key to filename: %s", filename.c_str());
+        outfile.close();
+        return;
+    }
+    ALOGD("Wrote %i bytes to out file for key", static_cast<int>(outfile.tellp()));
+
+    // Then write the value
+    outfile.write(static_cast<const char*>(value), valueSize);
+    if (outfile.bad()) {
+        ALOGW("Unable to write value to filename: %s", filename.c_str());
+        outfile.close();
+        return;
+    }
+    ALOGD("Wrote %i bytes to out file for full entry", static_cast<int>(outfile.tellp()));
+
+    outfile.close();
+}
+
+EGLsizeiANDROID getBlobMultifile(const void* key, EGLsizeiANDROID keySize, void* value,
+                                 EGLsizeiANDROID valueSize, const std::string& baseDir) {
+    if (baseDir.empty()) {
+        return 0;
+    }
+
+    setupMultifile(baseDir);
+    std::string filename = getCacheEntryFilename(key, keySize, multifileDirName);
+
+    // Open the hashed filename path
+    ALOGD("Attempting to open filename for get: %s", filename.c_str());
+    int fd = open(filename.c_str(), O_RDONLY);
+
+    // File doesn't exist, this is a MISS, return zero bytes read
+    if (fd == -1) {
+        ALOGD("Cache MISS - failed to open filename: %s, error: %s", filename.c_str(),
+              std::strerror(errno));
+        return 0;
+    }
+
+    ALOGD("Cache HIT - opened filename: %s", filename.c_str());
+
+    // Get the size of the file
+    size_t entrySize = getFileSize(filename);
+    if (keySize > entrySize) {
+        ALOGW("keySize (%lu) is larger than entrySize (%zu). This is a hash collision or modified "
+              "file",
+              keySize, entrySize);
+        close(fd);
+        return 0;
+    }
+
+    // Memory map the file
+    uint8_t* cacheEntry =
+            reinterpret_cast<uint8_t*>(mmap(nullptr, entrySize, PROT_READ, MAP_PRIVATE, fd, 0));
+    if (cacheEntry == MAP_FAILED) {
+        ALOGE("Failed to mmap cacheEntry, error: %s", std::strerror(errno));
+        close(fd);
+        return 0;
+    }
+
+    // Compare the incoming key with our stored version (the beginning of the entry)
+    int compare = memcmp(cacheEntry, key, keySize);
+    if (compare != 0) {
+        ALOGW("Cached key and new key do not match! This is a hash collision or modified file");
+        munmap(cacheEntry, entrySize);
+        close(fd);
+        return 0;
+    }
+
+    // Keys matched, so remaining cache is value size
+    size_t cachedValueSize = entrySize - keySize;
+
+    // Return actual value size if valueSize is not large enough
+    if (cachedValueSize > valueSize) {
+        ALOGD("Skipping file read, not enough room provided (valueSize): %lu, "
+              "returning required space as %zu",
+              valueSize, cachedValueSize);
+        munmap(cacheEntry, entrySize);
+        close(fd);
+        return cachedValueSize;
+    }
+
+    // Remaining entry following the key is the value
+    uint8_t* cachedValue = cacheEntry + keySize;
+    memcpy(value, cachedValue, cachedValueSize);
+    munmap(cacheEntry, entrySize);
+    close(fd);
+
+    ALOGD("Read %zu bytes from %s", cachedValueSize, filename.c_str());
+    return cachedValueSize;
+}
+
+// Walk through the files in our flat directory, checking the size of each one.
+// Return the total size of normal files in the directory.
+// This will need to be updated if we move to a multilevel cache dir.
+size_t getMultifileCacheSize() {
+    if (multifileDirName.empty()) {
+        return 0;
+    }
+
+    DIR* dir;
+    struct dirent* entry;
+    size_t size = 0;
+
+    ALOGD("Using %s as the multifile cache dir ", multifileDirName.c_str());
+
+    if ((dir = opendir(multifileDirName.c_str())) != nullptr) {
+        while ((entry = readdir(dir)) != nullptr) {
+            if (entry->d_name == "."s || entry->d_name == ".."s) {
+                continue;
+            }
+
+            // Add up the size of all files in the dir
+            std::string fullPath = multifileDirName + "/" + entry->d_name;
+            size += getFileSize(fullPath);
+        }
+        closedir(dir);
+    } else {
+        ALOGW("Unable to open filename: %s", multifileDirName.c_str());
+        return 0;
+    }
+
+    return size;
+}
+
+// When removing files, what fraction of the overall limit should be reached when removing files
+// A divisor of two will decrease the cache to 50%, four to 25% and so on
+constexpr uint32_t kCacheLimitDivisor = 2;
+
+// Calculate the cache size and remove old entries until under the limit
+void checkMultifileCacheSize(size_t cacheByteLimit) {
+    // Start with the value provided by egl_cache
+    size_t limit = cacheByteLimit;
+
+    // Check for a debug value
+    int debugCacheSize = base::GetIntProperty("debug.egl.blobcache.bytelimit", -1);
+    if (debugCacheSize >= 0) {
+        ALOGV("Overriding cache limit %zu with %i from debug.egl.blobcache.bytelimit", limit,
+              debugCacheSize);
+        limit = debugCacheSize;
+    }
+
+    // Tally up the initial amount of cache in use
+    size_t size = getMultifileCacheSize();
+    ALOGD("Multifile cache dir size: %zu", size);
+
+    // If size is larger than the threshold, remove files using LRU
+    if (size > limit) {
+        ALOGV("Multifile cache size is larger than %zu, removing old entries", cacheByteLimit);
+        if (!applyLRU(limit / kCacheLimitDivisor)) {
+            ALOGE("Error when clearing multifile shader cache");
+            return;
+        }
+    }
+    ALOGD("Multifile cache size after reduction: %zu", getMultifileCacheSize());
+}
+
+}; // namespace android
\ No newline at end of file
diff --git a/opengl/libs/EGL/egl_cache_multifile.h b/opengl/libs/EGL/egl_cache_multifile.h
new file mode 100644
index 0000000..ee5fe81
--- /dev/null
+++ b/opengl/libs/EGL/egl_cache_multifile.h
@@ -0,0 +1,36 @@
+/*
+ ** Copyright 2022, The Android Open Source Project
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ **
+ **     http://www.apache.org/licenses/LICENSE-2.0
+ **
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ */
+
+#ifndef ANDROID_EGL_CACHE_MULTIFILE_H
+#define ANDROID_EGL_CACHE_MULTIFILE_H
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <string>
+
+namespace android {
+
+void setBlobMultifile(const void* key, EGLsizeiANDROID keySize, const void* value,
+                      EGLsizeiANDROID valueSize, const std::string& baseDir);
+EGLsizeiANDROID getBlobMultifile(const void* key, EGLsizeiANDROID keySize, void* value,
+                                 EGLsizeiANDROID valueSize, const std::string& baseDir);
+size_t getMultifileCacheSize();
+void checkMultifileCacheSize(size_t cacheByteLimit);
+
+}; // namespace android
+
+#endif // ANDROID_EGL_CACHE_MULTIFILE_H
diff --git a/opengl/libs/EGL/egl_platform_entries.cpp b/opengl/libs/EGL/egl_platform_entries.cpp
index 7619a50..0527c8a 100644
--- a/opengl/libs/EGL/egl_platform_entries.cpp
+++ b/opengl/libs/EGL/egl_platform_entries.cpp
@@ -937,6 +937,8 @@
                 android::GraphicsEnv::getInstance().setTargetStats(
                         android::GpuStatsInfo::Stats::GLES_1_IN_USE);
             }
+            android::GraphicsEnv::getInstance().setTargetStats(
+                    android::GpuStatsInfo::Stats::CREATED_GLES_CONTEXT);
             egl_context_t* c = new egl_context_t(dpy, context, config, cnx, version);
             return c;
         }
diff --git a/opengl/tests/EGLTest/Android.bp b/opengl/tests/EGLTest/Android.bp
index 51c9376..d96a895 100644
--- a/opengl/tests/EGLTest/Android.bp
+++ b/opengl/tests/EGLTest/Android.bp
@@ -1,4 +1,3 @@
-
 package {
     // See: http://go/android-license-faq
     // A large-scale-change added 'default_applicable_licenses' to import
@@ -11,6 +10,7 @@
 cc_test {
 
     name: "EGL_test",
+    test_suites: ["general-tests"],
 
     srcs: [
         "egl_cache_test.cpp",
diff --git a/opengl/tests/EGLTest/EGL_test.cpp b/opengl/tests/EGLTest/EGL_test.cpp
index bbd786d..cbe4ef9 100644
--- a/opengl/tests/EGLTest/EGL_test.cpp
+++ b/opengl/tests/EGLTest/EGL_test.cpp
@@ -343,6 +343,11 @@
 }
 
 TEST_F(EGLTest, EGLDisplayP31010102) {
+    // This test has been failing since:
+    // libEGL: When driver doesn't understand P3, map sRGB-encoded P3 to sRGB
+    // https://android-review.git.corp.google.com/c/platform/frameworks/native/+/793504
+    GTEST_SKIP() << "Skipping broken test. See b/120714942 and b/117104367";
+
     EGLint numConfigs;
     EGLConfig config;
     EGLBoolean success;
@@ -866,6 +871,12 @@
     EGLConfig config;
     EGLBoolean success;
 
+    if (!hasWideColorDisplay) {
+        // skip this test if device does not have wide-color display
+        RecordProperty("hasWideColorDisplay", false);
+        return;
+    }
+
     const EGLint attrs[] = {
             // clang-format off
             EGL_SURFACE_TYPE,             EGL_WINDOW_BIT,
@@ -951,6 +962,12 @@
 TEST_F(EGLTest, EGLCreateWindowTwoColorspaces) {
     EGLConfig config;
 
+    if (!hasWideColorDisplay) {
+        // skip this test if device does not have wide-color display
+        RecordProperty("hasWideColorDisplay", false);
+        return;
+    }
+
     ASSERT_NO_FATAL_FAILURE(get8BitConfig(config));
 
     struct MockConsumer : public BnConsumerListener {
diff --git a/opengl/tests/EGLTest/egl_cache_test.cpp b/opengl/tests/EGLTest/egl_cache_test.cpp
index c974f63..c4fa65f 100644
--- a/opengl/tests/EGLTest/egl_cache_test.cpp
+++ b/opengl/tests/EGLTest/egl_cache_test.cpp
@@ -24,24 +24,33 @@
 #include <android-base/test_utils.h>
 
 #include "egl_cache.h"
+#include "egl_cache_multifile.h"
 #include "egl_display.h"
 
 #include <memory>
 
+using namespace std::literals;
+
 namespace android {
 
 class EGLCacheTest : public ::testing::Test {
 protected:
     virtual void SetUp() {
         mCache = egl_cache_t::get();
+        mTempFile.reset(new TemporaryFile());
+        mCache->setCacheFilename(&mTempFile->path[0]);
     }
 
     virtual void TearDown() {
-        mCache->setCacheFilename("");
         mCache->terminate();
+        mCache->setCacheFilename("");
+        mTempFile.reset(nullptr);
     }
 
+    std::string getCachefileName();
+
     egl_cache_t* mCache;
+    std::unique_ptr<TemporaryFile> mTempFile;
 };
 
 TEST_F(EGLCacheTest, UninitializedCacheAlwaysMisses) {
@@ -77,26 +86,8 @@
     ASSERT_EQ(0xee, buf[3]);
 }
 
-class EGLCacheSerializationTest : public EGLCacheTest {
-
-protected:
-
-    virtual void SetUp() {
-        EGLCacheTest::SetUp();
-        mTempFile.reset(new TemporaryFile());
-    }
-
-    virtual void TearDown() {
-        mTempFile.reset(nullptr);
-        EGLCacheTest::TearDown();
-    }
-
-    std::unique_ptr<TemporaryFile> mTempFile;
-};
-
-TEST_F(EGLCacheSerializationTest, ReinitializedCacheContainsValues) {
+TEST_F(EGLCacheTest, ReinitializedCacheContainsValues) {
     uint8_t buf[4] = { 0xee, 0xee, 0xee, 0xee };
-    mCache->setCacheFilename(&mTempFile->path[0]);
     mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
     mCache->setBlob("abcd", 4, "efgh", 4);
     mCache->terminate();
@@ -108,4 +99,106 @@
     ASSERT_EQ('h', buf[3]);
 }
 
+std::string EGLCacheTest::getCachefileName() {
+    // Return the monolithic filename unless we find the multifile dir
+    std::string cachefileName = &mTempFile->path[0];
+    std::string multifileDirName = cachefileName + ".multifile";
+
+    struct stat info;
+    if (stat(multifileDirName.c_str(), &info) == 0) {
+
+        // Ensure we only have one file to manage
+        int realFileCount = 0;
+
+        // We have a multifile dir. Return the only real file in it.
+        DIR* dir;
+        struct dirent* entry;
+        if ((dir = opendir(multifileDirName.c_str())) != nullptr) {
+            while ((entry = readdir(dir)) != nullptr) {
+                if (entry->d_name == "."s || entry->d_name == ".."s) {
+                    continue;
+                }
+                cachefileName = multifileDirName + "/" + entry->d_name;
+                realFileCount++;
+            }
+        }
+
+        if (realFileCount != 1) {
+            // If there was more than one real file in the directory, this
+            // violates test assumptions
+            cachefileName = "";
+        }
+    }
+
+    return cachefileName;
+}
+
+TEST_F(EGLCacheTest, ModifiedCacheMisses) {
+    uint8_t buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
+
+    mCache->setBlob("abcd", 4, "efgh", 4);
+    ASSERT_EQ(4, mCache->getBlob("abcd", 4, buf, 4));
+    ASSERT_EQ('e', buf[0]);
+    ASSERT_EQ('f', buf[1]);
+    ASSERT_EQ('g', buf[2]);
+    ASSERT_EQ('h', buf[3]);
+
+    // Depending on the cache mode, the file will be in different locations
+    std::string cachefileName = getCachefileName();
+    ASSERT_TRUE(cachefileName.length() > 0);
+
+    // Ensure the cache file is written to disk
+    mCache->terminate();
+
+    // Stomp on the beginning of the cache file, breaking the key match
+    const long stomp = 0xbadf00d;
+    FILE *file = fopen(cachefileName.c_str(), "w");
+    fprintf(file, "%ld", stomp);
+    fflush(file);
+    fclose(file);
+
+    // Ensure no cache hit
+    mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
+    uint8_t buf2[4] = { 0xee, 0xee, 0xee, 0xee };
+    ASSERT_EQ(0, mCache->getBlob("abcd", 4, buf2, 4));
+    ASSERT_EQ(0xee, buf2[0]);
+    ASSERT_EQ(0xee, buf2[1]);
+    ASSERT_EQ(0xee, buf2[2]);
+    ASSERT_EQ(0xee, buf2[3]);
+}
+
+TEST_F(EGLCacheTest, TerminatedCacheBelowCacheLimit) {
+    uint8_t buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
+
+    mCache->setBlob("abcd", 4, "efgh", 4);
+    ASSERT_EQ(4, mCache->getBlob("abcd", 4, buf, 4));
+    ASSERT_EQ('e', buf[0]);
+    ASSERT_EQ('f', buf[1]);
+    ASSERT_EQ('g', buf[2]);
+    ASSERT_EQ('h', buf[3]);
+
+    mCache->setBlob("ijkl", 4, "mnop", 4);
+    ASSERT_EQ(4, mCache->getBlob("ijkl", 4, buf, 4));
+    ASSERT_EQ('m', buf[0]);
+    ASSERT_EQ('n', buf[1]);
+    ASSERT_EQ('o', buf[2]);
+    ASSERT_EQ('p', buf[3]);
+
+    mCache->setBlob("qrst", 4, "uvwx", 4);
+    ASSERT_EQ(4, mCache->getBlob("qrst", 4, buf, 4));
+    ASSERT_EQ('u', buf[0]);
+    ASSERT_EQ('v', buf[1]);
+    ASSERT_EQ('w', buf[2]);
+    ASSERT_EQ('x', buf[3]);
+
+    // Cache should contain both the key and the value
+    // So 8 bytes per entry, at least 24 bytes
+    ASSERT_GE(mCache->getCacheSize(), 24);
+    mCache->setCacheLimit(4);
+    mCache->terminate();
+    ASSERT_LE(mCache->getCacheSize(), 4);
+}
+
 }
diff --git a/services/gpuservice/GpuService.cpp b/services/gpuservice/GpuService.cpp
index 7b9782f..aaa8c18 100644
--- a/services/gpuservice/GpuService.cpp
+++ b/services/gpuservice/GpuService.cpp
@@ -82,6 +82,12 @@
     mGpuStats->insertTargetStats(appPackageName, driverVersionCode, stats, value);
 }
 
+void GpuService::setTargetStatsArray(const std::string& appPackageName,
+                                const uint64_t driverVersionCode, const GpuStatsInfo::Stats stats,
+                                const uint64_t* values, const uint32_t valueCount) {
+    mGpuStats->insertTargetStatsArray(appPackageName, driverVersionCode, stats, values, valueCount);
+}
+
 void GpuService::setUpdatableDriverPath(const std::string& driverPath) {
     IPCThreadState* ipc = IPCThreadState::self();
     const int pid = ipc->getCallingPid();
diff --git a/services/gpuservice/GpuService.h b/services/gpuservice/GpuService.h
index d7313d1..e7e0cba 100644
--- a/services/gpuservice/GpuService.h
+++ b/services/gpuservice/GpuService.h
@@ -56,6 +56,9 @@
                      int64_t driverLoadingTime) override;
     void setTargetStats(const std::string& appPackageName, const uint64_t driverVersionCode,
                         const GpuStatsInfo::Stats stats, const uint64_t value) override;
+    void setTargetStatsArray(const std::string& appPackageName,
+                        const uint64_t driverVersionCode, const GpuStatsInfo::Stats stats,
+                        const uint64_t* values, const uint32_t valueCount) override;
     void setUpdatableDriverPath(const std::string& driverPath) override;
     std::string getUpdatableDriverPath() override;
 
diff --git a/services/gpuservice/gpustats/GpuStats.cpp b/services/gpuservice/gpustats/GpuStats.cpp
index d033453..f06a045 100644
--- a/services/gpuservice/gpustats/GpuStats.cpp
+++ b/services/gpuservice/gpustats/GpuStats.cpp
@@ -175,29 +175,83 @@
 
 void GpuStats::insertTargetStats(const std::string& appPackageName,
                                  const uint64_t driverVersionCode, const GpuStatsInfo::Stats stats,
-                                 const uint64_t /*value*/) {
+                                 const uint64_t value) {
+    return insertTargetStatsArray(appPackageName, driverVersionCode, stats, &value, 1);
+}
+
+void GpuStats::insertTargetStatsArray(const std::string& appPackageName,
+                                 const uint64_t driverVersionCode, const GpuStatsInfo::Stats stats,
+                                 const uint64_t* values, const uint32_t valueCount) {
     ATRACE_CALL();
 
     const std::string appStatsKey = appPackageName + std::to_string(driverVersionCode);
 
     std::lock_guard<std::mutex> lock(mLock);
     registerStatsdCallbacksIfNeeded();
-    if (!mAppStats.count(appStatsKey)) {
+
+    const auto foundApp = mAppStats.find(appStatsKey);
+    if (foundApp == mAppStats.end()) {
         return;
     }
 
-    switch (stats) {
-        case GpuStatsInfo::Stats::CPU_VULKAN_IN_USE:
-            mAppStats[appStatsKey].cpuVulkanInUse = true;
-            break;
-        case GpuStatsInfo::Stats::FALSE_PREROTATION:
-            mAppStats[appStatsKey].falsePrerotation = true;
-            break;
-        case GpuStatsInfo::Stats::GLES_1_IN_USE:
-            mAppStats[appStatsKey].gles1InUse = true;
-            break;
-        default:
-            break;
+    GpuStatsAppInfo& targetAppStats = foundApp->second;
+
+    if (stats == GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION
+        || stats == GpuStatsInfo::Stats::VULKAN_DEVICE_EXTENSION) {
+        // Handle extension arrays separately as we need to store a unique set of them
+        // in the stats vector. Storing in std::set<> is not efficient for serialization tasks.
+        std::vector<int32_t>& targetVec =
+                                (stats == GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION) ?
+                                targetAppStats.vulkanInstanceExtensions :
+                                targetAppStats.vulkanDeviceExtensions;
+        const bool addAll = (targetVec.size() == 0);
+        targetVec.reserve(valueCount);
+
+        // Add new extensions into the set
+        for(uint32_t i = 0;
+            (i < valueCount) && (targetVec.size() < GpuStatsAppInfo::MAX_NUM_EXTENSIONS);
+            i++) {
+            const int32_t extVal = int32_t(values[i] & 0xFFFFFFFF);
+            if (addAll
+                || std::find(targetVec.cbegin(), targetVec.cend(), extVal) == targetVec.cend()) {
+                targetVec.push_back(extVal);
+            }
+        }
+    }
+    else {
+        // Handle other type of stats info events
+        for(uint32_t i = 0; i < valueCount; i++) {
+            const uint64_t value = values[i];
+            switch (stats) {
+                case GpuStatsInfo::Stats::CPU_VULKAN_IN_USE:
+                    targetAppStats.cpuVulkanInUse = true;
+                    break;
+                case GpuStatsInfo::Stats::FALSE_PREROTATION:
+                    targetAppStats.falsePrerotation = true;
+                    break;
+                case GpuStatsInfo::Stats::GLES_1_IN_USE:
+                    targetAppStats.gles1InUse = true;
+                    break;
+                case GpuStatsInfo::Stats::CREATED_GLES_CONTEXT:
+                    targetAppStats.createdGlesContext = true;
+                    break;
+                case GpuStatsInfo::Stats::CREATED_VULKAN_DEVICE:
+                    targetAppStats.createdVulkanDevice = true;
+                    break;
+                case GpuStatsInfo::Stats::CREATED_VULKAN_API_VERSION:
+                    targetAppStats.vulkanApiVersion = uint32_t(value & 0xffffffff);
+                    break;
+                case GpuStatsInfo::Stats::CREATED_VULKAN_SWAPCHAIN:
+                    targetAppStats.createdVulkanSwapchain = true;
+                    break;
+                case GpuStatsInfo::Stats::VULKAN_DEVICE_FEATURES_ENABLED:
+                    // Merge all requested feature bits together for this app
+                    targetAppStats.vulkanDeviceFeaturesEnabled |= value;
+                    break;
+                default:
+                    break;
+            }
+        }
     }
 }
 
@@ -347,7 +401,14 @@
                     ele.second.cpuVulkanInUse,
                     ele.second.falsePrerotation,
                     ele.second.gles1InUse,
-                    ele.second.angleInUse);
+                    ele.second.angleInUse,
+                    ele.second.createdGlesContext,
+                    ele.second.createdVulkanDevice,
+                    ele.second.createdVulkanSwapchain,
+                    ele.second.vulkanApiVersion,
+                    ele.second.vulkanDeviceFeaturesEnabled,
+                    ele.second.vulkanInstanceExtensions,
+                    ele.second.vulkanDeviceExtensions);
         }
     }
 
diff --git a/services/gpuservice/gpustats/include/gpustats/GpuStats.h b/services/gpuservice/gpustats/include/gpustats/GpuStats.h
index 2aba651..22c64db 100644
--- a/services/gpuservice/gpustats/include/gpustats/GpuStats.h
+++ b/services/gpuservice/gpustats/include/gpustats/GpuStats.h
@@ -41,11 +41,14 @@
     // Insert target stats into app stats or potentially global stats as well.
     void insertTargetStats(const std::string& appPackageName, const uint64_t driverVersionCode,
                            const GpuStatsInfo::Stats stats, const uint64_t value);
+    void insertTargetStatsArray(const std::string& appPackageName,
+                           const uint64_t driverVersionCode, const GpuStatsInfo::Stats stats,
+                           const uint64_t* values, const uint32_t valueCount);
     // dumpsys interface
     void dump(const Vector<String16>& args, std::string* result);
 
     // This limits the worst case number of loading times tracked.
-    static const size_t MAX_NUM_LOADING_TIMES = 50;
+    static const size_t MAX_NUM_LOADING_TIMES = 16;
     // Below limits the memory usage of GpuStats to be less than 10KB. This is
     // the preferred number for statsd while maintaining nice data quality.
     static const size_t MAX_NUM_APP_RECORDS = 100;
diff --git a/services/gpuservice/tests/unittests/GpuStatsTest.cpp b/services/gpuservice/tests/unittests/GpuStatsTest.cpp
index 7ea2288..4ce533f 100644
--- a/services/gpuservice/tests/unittests/GpuStatsTest.cpp
+++ b/services/gpuservice/tests/unittests/GpuStatsTest.cpp
@@ -52,6 +52,13 @@
 #define DRIVER_LOADING_TIME_2     789
 #define DRIVER_LOADING_TIME_3     891
 
+constexpr uint64_t VULKAN_FEATURES_MASK = 0x600D;
+constexpr uint32_t VULKAN_API_VERSION = 0x400000;
+constexpr int32_t VULKAN_INSTANCE_EXTENSION_1 = 0x1234;
+constexpr int32_t VULKAN_INSTANCE_EXTENSION_2 = 0x8765;
+constexpr int32_t VULKAN_DEVICE_EXTENSION_1 = 0x9012;
+constexpr int32_t VULKAN_DEVICE_EXTENSION_2 = 0x3456;
+
 enum InputCommand : int32_t {
     DUMP_ALL               = 0,
     DUMP_GLOBAL            = 1,
@@ -218,6 +225,24 @@
                                  GpuStatsInfo::Stats::FALSE_PREROTATION, 0);
     mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
                                  GpuStatsInfo::Stats::GLES_1_IN_USE, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_GLES_CONTEXT, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_VULKAN_API_VERSION,
+                                 VULKAN_API_VERSION);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_VULKAN_DEVICE, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_VULKAN_SWAPCHAIN, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_DEVICE_FEATURES_ENABLED,
+                                 VULKAN_FEATURES_MASK);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION,
+                                 VULKAN_INSTANCE_EXTENSION_1);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_DEVICE_EXTENSION,
+                                 VULKAN_DEVICE_EXTENSION_1);
 
     EXPECT_TRUE(inputCommand(InputCommand::DUMP_APP).empty());
 }
@@ -233,10 +258,51 @@
                                  GpuStatsInfo::Stats::FALSE_PREROTATION, 0);
     mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
                                  GpuStatsInfo::Stats::GLES_1_IN_USE, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_GLES_CONTEXT, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_VULKAN_API_VERSION,
+                                 VULKAN_API_VERSION);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_VULKAN_DEVICE, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::CREATED_VULKAN_SWAPCHAIN, 0);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_DEVICE_FEATURES_ENABLED,
+                                 VULKAN_FEATURES_MASK);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION,
+                                 VULKAN_INSTANCE_EXTENSION_1);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION,
+                                 VULKAN_INSTANCE_EXTENSION_2);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_DEVICE_EXTENSION,
+                                 VULKAN_DEVICE_EXTENSION_1);
+    mGpuStats->insertTargetStats(APP_PKG_NAME_1, BUILTIN_DRIVER_VER_CODE,
+                                 GpuStatsInfo::Stats::VULKAN_DEVICE_EXTENSION,
+                                 VULKAN_DEVICE_EXTENSION_2);
 
     EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("cpuVulkanInUse = 1"));
     EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("falsePrerotation = 1"));
     EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("gles1InUse = 1"));
+    EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("createdGlesContext = 1"));
+    EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("createdVulkanDevice = 1"));
+    EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("createdVulkanSwapchain = 1"));
+    std::stringstream expectedResult;
+    expectedResult << "vulkanApiVersion = 0x" << std::hex << VULKAN_API_VERSION;
+    EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
+    expectedResult.str("");
+    expectedResult << "vulkanDeviceFeaturesEnabled = 0x" << std::hex << VULKAN_FEATURES_MASK;
+    EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
+    expectedResult.str("");
+    expectedResult << "vulkanInstanceExtensions: 0x" << std::hex << VULKAN_INSTANCE_EXTENSION_1
+                    << " 0x" << std::hex << VULKAN_INSTANCE_EXTENSION_2;
+    EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
+    expectedResult.str("");
+    expectedResult << "vulkanDeviceExtensions: 0x" << std::hex << VULKAN_DEVICE_EXTENSION_1
+                    << " 0x" << std::hex << VULKAN_DEVICE_EXTENSION_2;
+    EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
 }
 
 // Verify we always have the most recently used apps in mAppStats, even when we fill it.
@@ -260,11 +326,52 @@
                                      GpuStatsInfo::Stats::FALSE_PREROTATION, 0);
         mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
                                      GpuStatsInfo::Stats::GLES_1_IN_USE, 0);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                     GpuStatsInfo::Stats::CREATED_GLES_CONTEXT, 0);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::CREATED_VULKAN_API_VERSION,
+                                    VULKAN_API_VERSION);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::CREATED_VULKAN_DEVICE, 0);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::CREATED_VULKAN_SWAPCHAIN, 0);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::VULKAN_DEVICE_FEATURES_ENABLED,
+                                    VULKAN_FEATURES_MASK);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION,
+                                    VULKAN_INSTANCE_EXTENSION_1);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::VULKAN_INSTANCE_EXTENSION,
+                                    VULKAN_INSTANCE_EXTENSION_2);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::VULKAN_DEVICE_EXTENSION,
+                                    VULKAN_DEVICE_EXTENSION_1);
+        mGpuStats->insertTargetStats(fullPkgName, BUILTIN_DRIVER_VER_CODE,
+                                    GpuStatsInfo::Stats::VULKAN_DEVICE_EXTENSION,
+                                    VULKAN_DEVICE_EXTENSION_2);
 
         EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(fullPkgName.c_str()));
         EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("cpuVulkanInUse = 1"));
         EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("falsePrerotation = 1"));
         EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("gles1InUse = 1"));
+        EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("createdGlesContext = 1"));
+        EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("createdVulkanDevice = 1"));
+        EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr("createdVulkanSwapchain = 1"));
+        std::stringstream expectedResult;
+        expectedResult << "vulkanApiVersion = 0x" << std::hex << VULKAN_API_VERSION;
+        EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
+        expectedResult.str("");
+        expectedResult << "vulkanDeviceFeaturesEnabled = 0x" << std::hex << VULKAN_FEATURES_MASK;
+        EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
+        expectedResult.str("");
+        expectedResult << "vulkanInstanceExtensions: 0x" << std::hex << VULKAN_INSTANCE_EXTENSION_1
+                        << " 0x" << std::hex << VULKAN_INSTANCE_EXTENSION_2;
+        EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
+        expectedResult.str("");
+        expectedResult << "vulkanDeviceExtensions: 0x" << std::hex << VULKAN_DEVICE_EXTENSION_1
+                        << " 0x" << std::hex << VULKAN_DEVICE_EXTENSION_2;
+        EXPECT_THAT(inputCommand(InputCommand::DUMP_APP), HasSubstr(expectedResult.str()));
     }
 
     // mAppStats purges GpuStats::APP_RECORD_HEADROOM apps removed everytime it's filled up.
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index 4aac377..906bb1b 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -2060,6 +2060,12 @@
         if (touchedWindow.windowHandle->getInfo()->supportsSplitTouch()) {
             continue;
         }
+        if (touchedWindow.windowHandle->getInfo()->inputConfig.test(
+                    gui::WindowInfo::InputConfig::IS_WALLPAPER)) {
+            // Wallpaper window should not affect whether or not touch is split
+            continue;
+        }
+
         // Eventually, touchedWindow will contain the deviceId of each pointer that's currently
         // being sent there. For now, use deviceId from touch state.
         if (entry.deviceId == touchState.deviceId && !touchedWindow.pointerIds.isEmpty()) {
@@ -2223,6 +2229,32 @@
 
             tempTouchState.addOrUpdateWindow(windowHandle, targetFlags, pointerIds,
                                              entry.eventTime);
+
+            // If this is the pointer going down and the touched window has a wallpaper
+            // then also add the touched wallpaper windows so they are locked in for the duration
+            // of the touch gesture.
+            // We do not collect wallpapers during HOVER_MOVE or SCROLL because the wallpaper
+            // engine only supports touch events.  We would need to add a mechanism similar
+            // to View.onGenericMotionEvent to enable wallpapers to handle these events.
+            if (maskedAction == AMOTION_EVENT_ACTION_DOWN ||
+                maskedAction == AMOTION_EVENT_ACTION_POINTER_DOWN) {
+                if (targetFlags.test(InputTarget::Flags::FOREGROUND) &&
+                    windowHandle->getInfo()->inputConfig.test(
+                            gui::WindowInfo::InputConfig::DUPLICATE_TOUCH_TO_WALLPAPER)) {
+                    sp<WindowInfoHandle> wallpaper = findWallpaperWindowBelow(windowHandle);
+                    if (wallpaper != nullptr) {
+                        ftl::Flags<InputTarget::Flags> wallpaperFlags =
+                                InputTarget::Flags::WINDOW_IS_OBSCURED |
+                                InputTarget::Flags::WINDOW_IS_PARTIALLY_OBSCURED |
+                                InputTarget::Flags::DISPATCH_AS_IS;
+                        if (isSplit) {
+                            wallpaperFlags |= InputTarget::Flags::SPLIT;
+                        }
+                        tempTouchState.addOrUpdateWindow(wallpaper, wallpaperFlags, pointerIds,
+                                                         entry.eventTime);
+                    }
+                }
+            }
         }
 
         // If any existing window is pilfering pointers from newly added window, remove it
@@ -2307,6 +2339,10 @@
                 pointerIds.markBit(entry.pointerProperties[0].id);
                 tempTouchState.addOrUpdateWindow(newTouchedWindowHandle, targetFlags, pointerIds,
                                                  entry.eventTime);
+
+                // Check if the wallpaper window should deliver the corresponding event.
+                slipWallpaperTouch(targetFlags, oldTouchedWindowHandle, newTouchedWindowHandle,
+                                   tempTouchState, pointerIds);
             }
         }
 
@@ -2413,38 +2449,6 @@
         }
     }
 
-    // If this is the first pointer going down and the touched window has a wallpaper
-    // then also add the touched wallpaper windows so they are locked in for the duration
-    // of the touch gesture.
-    // We do not collect wallpapers during HOVER_MOVE or SCROLL because the wallpaper
-    // engine only supports touch events.  We would need to add a mechanism similar
-    // to View.onGenericMotionEvent to enable wallpapers to handle these events.
-    if (maskedAction == AMOTION_EVENT_ACTION_DOWN) {
-        sp<WindowInfoHandle> foregroundWindowHandle =
-                tempTouchState.getFirstForegroundWindowHandle();
-        if (foregroundWindowHandle &&
-            foregroundWindowHandle->getInfo()->inputConfig.test(
-                    WindowInfo::InputConfig::DUPLICATE_TOUCH_TO_WALLPAPER)) {
-            const std::vector<sp<WindowInfoHandle>>& windowHandles =
-                    getWindowHandlesLocked(displayId);
-            for (const sp<WindowInfoHandle>& windowHandle : windowHandles) {
-                const WindowInfo* info = windowHandle->getInfo();
-                if (info->displayId == displayId &&
-                    windowHandle->getInfo()->inputConfig.test(
-                            WindowInfo::InputConfig::IS_WALLPAPER)) {
-                    BitSet32 pointerIds;
-                    pointerIds.markBit(entry.pointerProperties[0].id);
-                    tempTouchState.addOrUpdateWindow(windowHandle,
-                                                     InputTarget::Flags::WINDOW_IS_OBSCURED |
-                                                             InputTarget::Flags::
-                                                                     WINDOW_IS_PARTIALLY_OBSCURED |
-                                                             InputTarget::Flags::DISPATCH_AS_IS,
-                                                     pointerIds, entry.eventTime);
-                }
-            }
-        }
-    }
-
     // Success!  Output targets.
     touchedWindows = tempTouchState.windows;
     outInjectionResult = InputEventInjectionResult::SUCCEEDED;
@@ -3726,7 +3730,8 @@
 }
 
 void InputDispatcher::synthesizePointerDownEventsForConnectionLocked(
-        const nsecs_t downTime, const sp<Connection>& connection) {
+        const nsecs_t downTime, const sp<Connection>& connection,
+        ftl::Flags<InputTarget::Flags> targetFlags) {
     if (connection->status == Connection::Status::BROKEN) {
         return;
     }
@@ -3752,7 +3757,7 @@
         target.globalScaleFactor = windowInfo->globalScaleFactor;
     }
     target.inputChannel = connection->inputChannel;
-    target.flags = InputTarget::Flags::DISPATCH_AS_IS;
+    target.flags = targetFlags;
 
     const bool wasEmpty = connection->outboundQueue.empty();
     for (std::unique_ptr<EventEntry>& downEventEntry : downEvents) {
@@ -3787,6 +3792,16 @@
     }
 }
 
+void InputDispatcher::synthesizeCancelationEventsForWindowLocked(
+        const sp<WindowInfoHandle>& windowHandle, const CancelationOptions& options) {
+    if (windowHandle != nullptr) {
+        sp<Connection> wallpaperConnection = getConnectionLocked(windowHandle->getToken());
+        if (wallpaperConnection != nullptr) {
+            synthesizeCancelationEventsForConnectionLocked(wallpaperConnection, options);
+        }
+    }
+}
+
 std::unique_ptr<MotionEntry> InputDispatcher::splitMotionEvent(
         const MotionEntry& originalMotionEntry, BitSet32 pointerIds, nsecs_t splitDownTime) {
     ALOG_ASSERT(pointerIds.value != 0);
@@ -4847,14 +4862,7 @@
                         touchedWindow.windowHandle->getInfo()->inputConfig.test(
                                 gui::WindowInfo::InputConfig::DUPLICATE_TOUCH_TO_WALLPAPER)) {
                         sp<WindowInfoHandle> wallpaper = state.getWallpaperWindow();
-                        if (wallpaper != nullptr) {
-                            sp<Connection> wallpaperConnection =
-                                    getConnectionLocked(wallpaper->getToken());
-                            if (wallpaperConnection != nullptr) {
-                                synthesizeCancelationEventsForConnectionLocked(wallpaperConnection,
-                                                                               options);
-                            }
-                        }
+                        synthesizeCancelationEventsForWindowLocked(wallpaper, options);
                     }
                 }
                 state.windows.erase(state.windows.begin() + i);
@@ -5155,6 +5163,7 @@
         // Erase old window.
         ftl::Flags<InputTarget::Flags> oldTargetFlags = touchedWindow->targetFlags;
         BitSet32 pointerIds = touchedWindow->pointerIds;
+        sp<WindowInfoHandle> fromWindowHandle = touchedWindow->windowHandle;
         state->removeWindowByToken(fromToken);
 
         // Add new window.
@@ -5187,7 +5196,12 @@
                     options(CancelationOptions::Mode::CANCEL_POINTER_EVENTS,
                             "transferring touch focus from this window to another window");
             synthesizeCancelationEventsForConnectionLocked(fromConnection, options);
-            synthesizePointerDownEventsForConnectionLocked(downTimeInTarget, toConnection);
+            synthesizePointerDownEventsForConnectionLocked(downTimeInTarget, toConnection,
+                                                           newTargetFlags);
+
+            // Check if the wallpaper window should deliver the corresponding event.
+            transferWallpaperTouch(oldTargetFlags, newTargetFlags, fromWindowHandle, toWindowHandle,
+                                   *state, pointerIds);
         }
     } // release lock
 
@@ -6465,4 +6479,100 @@
     mMonitorDispatchingTimeout = timeout;
 }
 
+void InputDispatcher::slipWallpaperTouch(ftl::Flags<InputTarget::Flags> targetFlags,
+                                         const sp<WindowInfoHandle>& oldWindowHandle,
+                                         const sp<WindowInfoHandle>& newWindowHandle,
+                                         TouchState& state, const BitSet32& pointerIds) {
+    const bool oldHasWallpaper = oldWindowHandle->getInfo()->inputConfig.test(
+            gui::WindowInfo::InputConfig::DUPLICATE_TOUCH_TO_WALLPAPER);
+    const bool newHasWallpaper = targetFlags.test(InputTarget::Flags::FOREGROUND) &&
+            newWindowHandle->getInfo()->inputConfig.test(
+                    gui::WindowInfo::InputConfig::DUPLICATE_TOUCH_TO_WALLPAPER);
+    const sp<WindowInfoHandle> oldWallpaper =
+            oldHasWallpaper ? state.getWallpaperWindow() : nullptr;
+    const sp<WindowInfoHandle> newWallpaper =
+            newHasWallpaper ? findWallpaperWindowBelow(newWindowHandle) : nullptr;
+    if (oldWallpaper == newWallpaper) {
+        return;
+    }
+
+    if (oldWallpaper != nullptr) {
+        state.addOrUpdateWindow(oldWallpaper, InputTarget::Flags::DISPATCH_AS_SLIPPERY_EXIT,
+                                BitSet32(0));
+    }
+
+    if (newWallpaper != nullptr) {
+        state.addOrUpdateWindow(newWallpaper,
+                                InputTarget::Flags::DISPATCH_AS_SLIPPERY_ENTER |
+                                        InputTarget::Flags::WINDOW_IS_OBSCURED |
+                                        InputTarget::Flags::WINDOW_IS_PARTIALLY_OBSCURED,
+                                pointerIds);
+    }
+}
+
+void InputDispatcher::transferWallpaperTouch(ftl::Flags<InputTarget::Flags> oldTargetFlags,
+                                             ftl::Flags<InputTarget::Flags> newTargetFlags,
+                                             const sp<WindowInfoHandle> fromWindowHandle,
+                                             const sp<WindowInfoHandle> toWindowHandle,
+                                             TouchState& state, const BitSet32& pointerIds) {
+    const bool oldHasWallpaper = oldTargetFlags.test(InputTarget::Flags::FOREGROUND) &&
+            fromWindowHandle->getInfo()->inputConfig.test(
+                    gui::WindowInfo::InputConfig::DUPLICATE_TOUCH_TO_WALLPAPER);
+    const bool newHasWallpaper = newTargetFlags.test(InputTarget::Flags::FOREGROUND) &&
+            toWindowHandle->getInfo()->inputConfig.test(
+                    gui::WindowInfo::InputConfig::DUPLICATE_TOUCH_TO_WALLPAPER);
+
+    const sp<WindowInfoHandle> oldWallpaper =
+            oldHasWallpaper ? state.getWallpaperWindow() : nullptr;
+    const sp<WindowInfoHandle> newWallpaper =
+            newHasWallpaper ? findWallpaperWindowBelow(toWindowHandle) : nullptr;
+    if (oldWallpaper == newWallpaper) {
+        return;
+    }
+
+    if (oldWallpaper != nullptr) {
+        CancelationOptions options(CancelationOptions::Mode::CANCEL_POINTER_EVENTS,
+                                   "transferring touch focus to another window");
+        state.removeWindowByToken(oldWallpaper->getToken());
+        synthesizeCancelationEventsForWindowLocked(oldWallpaper, options);
+    }
+
+    if (newWallpaper != nullptr) {
+        nsecs_t downTimeInTarget = now();
+        ftl::Flags<InputTarget::Flags> wallpaperFlags =
+                oldTargetFlags & (InputTarget::Flags::SPLIT | InputTarget::Flags::DISPATCH_AS_IS);
+        wallpaperFlags |= InputTarget::Flags::WINDOW_IS_OBSCURED |
+                InputTarget::Flags::WINDOW_IS_PARTIALLY_OBSCURED;
+        state.addOrUpdateWindow(newWallpaper, wallpaperFlags, pointerIds, downTimeInTarget);
+        sp<Connection> wallpaperConnection = getConnectionLocked(newWallpaper->getToken());
+        if (wallpaperConnection != nullptr) {
+            sp<Connection> toConnection = getConnectionLocked(toWindowHandle->getToken());
+            toConnection->inputState.mergePointerStateTo(wallpaperConnection->inputState);
+            synthesizePointerDownEventsForConnectionLocked(downTimeInTarget, wallpaperConnection,
+                                                           wallpaperFlags);
+        }
+    }
+}
+
+sp<WindowInfoHandle> InputDispatcher::findWallpaperWindowBelow(
+        const sp<WindowInfoHandle>& windowHandle) const {
+    const std::vector<sp<WindowInfoHandle>>& windowHandles =
+            getWindowHandlesLocked(windowHandle->getInfo()->displayId);
+    bool foundWindow = false;
+    for (const sp<WindowInfoHandle>& otherHandle : windowHandles) {
+        if (!foundWindow && otherHandle != windowHandle) {
+            continue;
+        }
+        if (windowHandle == otherHandle) {
+            foundWindow = true;
+            continue;
+        }
+
+        if (otherHandle->getInfo()->inputConfig.test(WindowInfo::InputConfig::IS_WALLPAPER)) {
+            return otherHandle;
+        }
+    }
+    return nullptr;
+}
+
 } // namespace android::inputdispatcher
diff --git a/services/inputflinger/dispatcher/InputDispatcher.h b/services/inputflinger/dispatcher/InputDispatcher.h
index 5efb39e..a32ebd3 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.h
+++ b/services/inputflinger/dispatcher/InputDispatcher.h
@@ -628,9 +628,14 @@
             REQUIRES(mLock);
 
     void synthesizePointerDownEventsForConnectionLocked(const nsecs_t downTime,
-                                                        const sp<Connection>& connection)
+                                                        const sp<Connection>& connection,
+                                                        ftl::Flags<InputTarget::Flags> targetFlags)
             REQUIRES(mLock);
 
+    void synthesizeCancelationEventsForWindowLocked(
+            const sp<android::gui::WindowInfoHandle>& windowHandle,
+            const CancelationOptions& options) REQUIRES(mLock);
+
     // Splitting motion events across windows. When splitting motion event for a target,
     // splitDownTime refers to the time of first 'down' event on that particular target
     std::unique_ptr<MotionEntry> splitMotionEvent(const MotionEntry& originalMotionEntry,
@@ -691,6 +696,19 @@
     bool recentWindowsAreOwnedByLocked(int32_t pid, int32_t uid) REQUIRES(mLock);
 
     sp<InputReporterInterface> mReporter;
+
+    void slipWallpaperTouch(ftl::Flags<InputTarget::Flags> targetFlags,
+                            const sp<android::gui::WindowInfoHandle>& oldWindowHandle,
+                            const sp<android::gui::WindowInfoHandle>& newWindowHandle,
+                            TouchState& state, const BitSet32& pointerIds) REQUIRES(mLock);
+    void transferWallpaperTouch(ftl::Flags<InputTarget::Flags> oldTargetFlags,
+                                ftl::Flags<InputTarget::Flags> newTargetFlags,
+                                const sp<android::gui::WindowInfoHandle> fromWindowHandle,
+                                const sp<android::gui::WindowInfoHandle> toWindowHandle,
+                                TouchState& state, const BitSet32& pointerIds) REQUIRES(mLock);
+
+    sp<android::gui::WindowInfoHandle> findWallpaperWindowBelow(
+            const sp<android::gui::WindowInfoHandle>& windowHandle) const REQUIRES(mLock);
 };
 
 } // namespace android::inputdispatcher
diff --git a/services/inputflinger/include/InputReaderBase.h b/services/inputflinger/include/InputReaderBase.h
index 6d6cefb..d2c940f 100644
--- a/services/inputflinger/include/InputReaderBase.h
+++ b/services/inputflinger/include/InputReaderBase.h
@@ -88,6 +88,9 @@
     virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask,
             int32_t sw) = 0;
 
+    virtual void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode,
+                                 int32_t toKeyCode) const = 0;
+
     virtual int32_t getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const = 0;
 
     /* Toggle Caps Lock */
@@ -188,6 +191,12 @@
         // The set of disabled input devices (disabledDevices) has changed.
         CHANGE_ENABLED_STATE = 1 << 9,
 
+        // The device type has been updated.
+        CHANGE_DEVICE_TYPE = 1 << 10,
+
+        // The keyboard layout association has changed.
+        CHANGE_KEYBOARD_LAYOUT_ASSOCIATION = 1 << 11,
+
         // All devices must be reopened.
         CHANGE_MUST_REOPEN = 1 << 31,
     };
@@ -205,10 +214,18 @@
     // Used to determine which DisplayViewport should be tied to which InputDevice.
     std::unordered_map<std::string, uint8_t> portAssociations;
 
-    // The associations between input device names and display unique ids.
+    // The associations between input device physical port locations and display unique ids.
     // Used to determine which DisplayViewport should be tied to which InputDevice.
     std::unordered_map<std::string, std::string> uniqueIdAssociations;
 
+    // The associations between input device ports device types.
+    // This is used to determine which device type and source should be tied to which InputDevice.
+    std::unordered_map<std::string, std::string> deviceTypeAssociations;
+
+    // The map from the input device physical port location to the input device layout info.
+    // Can be used to determine the layout of the keyboard device.
+    std::unordered_map<std::string, KeyboardLayoutInfo> keyboardLayoutAssociations;
+
     // The suggested display ID to show the cursor.
     int32_t defaultPointerDisplayId;
 
@@ -323,7 +340,6 @@
     std::optional<DisplayViewport> getDisplayViewportById(int32_t displayId) const;
     void setDisplayViewports(const std::vector<DisplayViewport>& viewports);
 
-
     void dump(std::string& dump) const;
     void dumpViewport(std::string& dump, const DisplayViewport& viewport) const;
 
diff --git a/services/inputflinger/reader/Android.bp b/services/inputflinger/reader/Android.bp
index f5ac8de..f3b680b 100644
--- a/services/inputflinger/reader/Android.bp
+++ b/services/inputflinger/reader/Android.bp
@@ -29,6 +29,7 @@
         "include",
         "mapper",
         "mapper/accumulator",
+        "mapper/gestures",
     ],
 }
 
@@ -50,6 +51,7 @@
         "mapper/SensorInputMapper.cpp",
         "mapper/SingleTouchInputMapper.cpp",
         "mapper/SwitchInputMapper.cpp",
+        "mapper/TouchCursorInputMapperCommon.cpp",
         "mapper/TouchInputMapper.cpp",
         "mapper/TouchpadInputMapper.cpp",
         "mapper/VibratorInputMapper.cpp",
@@ -59,7 +61,9 @@
         "mapper/accumulator/MultiTouchMotionAccumulator.cpp",
         "mapper/accumulator/SingleTouchMotionAccumulator.cpp",
         "mapper/accumulator/TouchButtonAccumulator.cpp",
+        "mapper/gestures/GestureConverter.cpp",
         "mapper/gestures/GesturesLogging.cpp",
+        "mapper/gestures/HardwareStateConverter.cpp",
     ],
 }
 
@@ -73,6 +77,7 @@
         "libcutils",
         "libjsoncpp",
         "liblog",
+        "libPlatformProperties",
         "libstatslog",
         "libutils",
     ],
@@ -89,7 +94,6 @@
     target: {
         android: {
             shared_libs: [
-                "libPlatformProperties",
                 "libinput",
             ],
         },
@@ -116,6 +120,9 @@
         "libchrome-gestures_headers",
         "libinputreader_headers",
     ],
+    whole_static_libs: [
+        "libchrome-gestures",
+    ],
 }
 
 cc_library_shared {
diff --git a/services/inputflinger/reader/EventHub.cpp b/services/inputflinger/reader/EventHub.cpp
index f2ea90c..e26bc8c 100644
--- a/services/inputflinger/reader/EventHub.cpp
+++ b/services/inputflinger/reader/EventHub.cpp
@@ -952,15 +952,19 @@
             device->getKeyCharacterMap()->mapKey(scanCodes[0], 0 /*usageCode*/, &outKeyCode);
     switch (mapKeyRes) {
         case OK:
-            return outKeyCode;
+            break;
         case NAME_NOT_FOUND:
             // key character map doesn't re-map this scanCode, hence the keyCode remains the same
-            return locationKeyCode;
+            outKeyCode = locationKeyCode;
+            break;
         default:
             ALOGW("Failed to get key code for key location: Key character map returned error %s",
                   statusToString(mapKeyRes).c_str());
-            return AKEYCODE_UNKNOWN;
+            outKeyCode = AKEYCODE_UNKNOWN;
+            break;
     }
+    // Remap if there is a Key remapping added to the KCM and return the remapped key
+    return device->getKeyCharacterMap()->applyKeyRemapping(outKeyCode);
 }
 
 int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
@@ -1023,6 +1027,18 @@
     return false;
 }
 
+void EventHub::addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const {
+    std::scoped_lock _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device == nullptr) {
+        return;
+    }
+    const std::shared_ptr<KeyCharacterMap> kcm = device->getKeyCharacterMap();
+    if (kcm) {
+        kcm->addKeyRemapping(fromKeyCode, toKeyCode);
+    }
+}
+
 status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, int32_t metaState,
                           int32_t* outKeycode, int32_t* outMetaState, uint32_t* outFlags) const {
     std::scoped_lock _l(mLock);
@@ -1048,7 +1064,13 @@
 
         if (status == NO_ERROR) {
             if (kcm) {
-                kcm->tryRemapKey(*outKeycode, metaState, outKeycode, outMetaState);
+                // Remap keys based on user-defined key remappings and key behavior defined in the
+                // corresponding kcm file
+                *outKeycode = kcm->applyKeyRemapping(*outKeycode);
+
+                // Remap keys based on Key behavior defined in KCM file
+                std::tie(*outKeycode, *outMetaState) =
+                        kcm->applyKeyBehavior(*outKeycode, metaState);
             } else {
                 *outMetaState = metaState;
             }
diff --git a/services/inputflinger/reader/InputDevice.cpp b/services/inputflinger/reader/InputDevice.cpp
index 150a8aa..13f40ee 100644
--- a/services/inputflinger/reader/InputDevice.cpp
+++ b/services/inputflinger/reader/InputDevice.cpp
@@ -20,6 +20,7 @@
 
 #include <algorithm>
 
+#include <android/sysprop/InputProperties.sysprop.h>
 #include <ftl/flags.h>
 
 #include "CursorInputMapper.h"
@@ -209,9 +210,9 @@
     }
 
     // Touchscreens and touchpad devices.
-    // TODO(b/251196347): replace this with a proper flag.
-    constexpr bool ENABLE_NEW_TOUCHPAD_STACK = false;
-    if (ENABLE_NEW_TOUCHPAD_STACK && classes.test(InputDeviceClass::TOUCHPAD) &&
+    static const bool ENABLE_TOUCHPAD_GESTURES_LIBRARY =
+            sysprop::InputProperties::enable_touchpad_gestures_library().value_or(false);
+    if (ENABLE_TOUCHPAD_GESTURES_LIBRARY && classes.test(InputDeviceClass::TOUCHPAD) &&
         classes.test(InputDeviceClass::TOUCH_MT)) {
         mappers.push_back(std::make_unique<TouchpadInputMapper>(*contextPtr));
     } else if (classes.test(InputDeviceClass::TOUCH_MT)) {
@@ -290,6 +291,9 @@
                 context.getConfiguration(&configuration);
                 mConfiguration.addAll(&configuration);
             });
+
+            mAssociatedDeviceType =
+                    getValueByKey(config->deviceTypeAssociations, mIdentifier.location);
         }
 
         if (!changes || (changes & InputReaderConfiguration::CHANGE_KEYBOARD_LAYOUTS)) {
@@ -624,6 +628,12 @@
     });
 }
 
+void InputDevice::addKeyRemapping(int32_t fromKeyCode, int32_t toKeyCode) {
+    for_each_subdevice([fromKeyCode, toKeyCode](auto& context) {
+        context.addKeyRemapping(fromKeyCode, toKeyCode);
+    });
+}
+
 void InputDevice::bumpGeneration() {
     mGeneration = mContext->bumpGeneration();
 }
diff --git a/services/inputflinger/reader/InputReader.cpp b/services/inputflinger/reader/InputReader.cpp
index f04a646..57f679c 100644
--- a/services/inputflinger/reader/InputReader.cpp
+++ b/services/inputflinger/reader/InputReader.cpp
@@ -650,6 +650,15 @@
     return result;
 }
 
+void InputReader::addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const {
+    std::scoped_lock _l(mLock);
+
+    InputDevice* device = findInputDeviceLocked(deviceId);
+    if (device != nullptr) {
+        device->addKeyRemapping(fromKeyCode, toKeyCode);
+    }
+}
+
 int32_t InputReader::getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const {
     std::scoped_lock _l(mLock);
 
diff --git a/services/inputflinger/reader/Macros.h b/services/inputflinger/reader/Macros.h
index e107d88..d2a7ced 100644
--- a/services/inputflinger/reader/Macros.h
+++ b/services/inputflinger/reader/Macros.h
@@ -22,6 +22,8 @@
 #include <log/log.h>
 #include <log/log_event_list.h>
 
+#include <unordered_map>
+
 namespace android {
 /**
  * Log debug messages for each raw event received from the EventHub.
@@ -113,4 +115,14 @@
     return (sources & sourceMask & ~AINPUT_SOURCE_CLASS_MASK) != 0;
 }
 
+template <typename K, typename V>
+static inline std::optional<V> getValueByKey(const std::unordered_map<K, V>& map, K key) {
+    auto it = map.find(key);
+    std::optional<V> value = std::nullopt;
+    if (it != map.end()) {
+        value = it->second;
+    }
+    return value;
+}
+
 } // namespace android
diff --git a/services/inputflinger/reader/include/EventHub.h b/services/inputflinger/reader/include/EventHub.h
index 42ca482..8a844b2 100644
--- a/services/inputflinger/reader/include/EventHub.h
+++ b/services/inputflinger/reader/include/EventHub.h
@@ -262,6 +262,9 @@
 
     virtual bool hasMscEvent(int32_t deviceId, int mscEvent) const = 0;
 
+    virtual void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode,
+                                 int32_t toKeyCode) const = 0;
+
     virtual status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
                             int32_t metaState, int32_t* outKeycode, int32_t* outMetaState,
                             uint32_t* outFlags) const = 0;
@@ -460,6 +463,9 @@
 
     bool hasMscEvent(int32_t deviceId, int mscEvent) const override final;
 
+    void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode,
+                         int32_t toKeyCode) const override final;
+
     status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, int32_t metaState,
                     int32_t* outKeycode, int32_t* outMetaState,
                     uint32_t* outFlags) const override final;
diff --git a/services/inputflinger/reader/include/InputDevice.h b/services/inputflinger/reader/include/InputDevice.h
index 439123b..b173618 100644
--- a/services/inputflinger/reader/include/InputDevice.h
+++ b/services/inputflinger/reader/include/InputDevice.h
@@ -54,6 +54,7 @@
     inline std::optional<std::string> getBluetoothAddress() const {
         return mIdentifier.bluetoothAddress;
     }
+    inline const std::string getLocation() const { return mIdentifier.location; }
     inline ftl::Flags<InputDeviceClass> getClasses() const { return mClasses; }
     inline uint32_t getSources() const { return mSources; }
     inline bool hasEventHubDevices() const { return !mDevices.empty(); }
@@ -65,6 +66,9 @@
     inline std::optional<std::string> getAssociatedDisplayUniqueId() const {
         return mAssociatedDisplayUniqueId;
     }
+    inline std::optional<std::string> getDeviceTypeAssociation() const {
+        return mAssociatedDeviceType;
+    }
     inline std::optional<DisplayViewport> getAssociatedViewport() const {
         return mAssociatedViewport;
     }
@@ -114,6 +118,8 @@
     int32_t getMetaState();
     void updateMetaState(int32_t keyCode);
 
+    void addKeyRemapping(int32_t fromKeyCode, int32_t toKeyCode);
+
     void bumpGeneration();
 
     [[nodiscard]] NotifyDeviceResetArgs notifyReset(nsecs_t when);
@@ -178,6 +184,7 @@
     bool mIsExternal;
     std::optional<uint8_t> mAssociatedDisplayPort;
     std::optional<std::string> mAssociatedDisplayUniqueId;
+    std::optional<std::string> mAssociatedDeviceType;
     std::optional<DisplayViewport> mAssociatedViewport;
     bool mHasMic;
     bool mDropUntilNextSync;
@@ -278,6 +285,10 @@
 
     inline bool hasMscEvent(int mscEvent) const { return mEventHub->hasMscEvent(mId, mscEvent); }
 
+    inline void addKeyRemapping(int32_t fromKeyCode, int32_t toKeyCode) const {
+        mEventHub->addKeyRemapping(mId, fromKeyCode, toKeyCode);
+    }
+
     inline status_t mapKey(int32_t scanCode, int32_t usageCode, int32_t metaState,
                            int32_t* outKeycode, int32_t* outMetaState, uint32_t* outFlags) const {
         return mEventHub->mapKey(mId, scanCode, usageCode, metaState, outKeycode, outMetaState,
@@ -393,8 +404,9 @@
     inline status_t enableDevice() { return mEventHub->enableDevice(mId); }
     inline status_t disableDevice() { return mEventHub->disableDevice(mId); }
 
-    inline const std::string getName() { return mDevice.getName(); }
+    inline const std::string getName() const { return mDevice.getName(); }
     inline const std::string getDescriptor() { return mDevice.getDescriptor(); }
+    inline const std::string getLocation() { return mDevice.getLocation(); }
     inline bool isExternal() { return mDevice.isExternal(); }
     inline std::optional<uint8_t> getAssociatedDisplayPort() const {
         return mDevice.getAssociatedDisplayPort();
@@ -402,6 +414,9 @@
     inline std::optional<std::string> getAssociatedDisplayUniqueId() const {
         return mDevice.getAssociatedDisplayUniqueId();
     }
+    inline std::optional<std::string> getDeviceTypeAssociation() const {
+        return mDevice.getDeviceTypeAssociation();
+    }
     inline std::optional<DisplayViewport> getAssociatedViewport() const {
         return mDevice.getAssociatedViewport();
     }
diff --git a/services/inputflinger/reader/include/InputReader.h b/services/inputflinger/reader/include/InputReader.h
index 4f2503a..e9c989a 100644
--- a/services/inputflinger/reader/include/InputReader.h
+++ b/services/inputflinger/reader/include/InputReader.h
@@ -68,6 +68,8 @@
     int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, int32_t keyCode) override;
     int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, int32_t sw) override;
 
+    void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const override;
+
     int32_t getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const override;
 
     void toggleCapsLockState(int32_t deviceId) override;
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
index 44f0dfe..6f01449 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
@@ -120,6 +120,10 @@
 
     info->setKeyboardType(mKeyboardType);
     info->setKeyCharacterMap(getDeviceContext().getKeyCharacterMap());
+
+    if (mKeyboardLayoutInfo) {
+        info->setKeyboardLayoutInfo(*mKeyboardLayoutInfo);
+    }
 }
 
 void KeyboardInputMapper::dump(std::string& dump) {
@@ -129,6 +133,12 @@
     dump += StringPrintf(INDENT3 "Orientation: %d\n", getOrientation());
     dump += StringPrintf(INDENT3 "KeyDowns: %zu keys currently down\n", mKeyDowns.size());
     dump += StringPrintf(INDENT3 "MetaState: 0x%0x\n", mMetaState);
+    dump += INDENT3 "KeyboardLayoutInfo: ";
+    if (mKeyboardLayoutInfo) {
+        dump += mKeyboardLayoutInfo->languageTag + ", " + mKeyboardLayoutInfo->layoutType + "\n";
+    } else {
+        dump += "<not set>\n";
+    }
 }
 
 std::optional<DisplayViewport> KeyboardInputMapper::findViewport(
@@ -158,6 +168,12 @@
     if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
         mViewport = findViewport(config);
     }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_KEYBOARD_LAYOUT_ASSOCIATION)) {
+        mKeyboardLayoutInfo =
+                getValueByKey(config->keyboardLayoutAssociations, getDeviceContext().getLocation());
+    }
+
     return out;
 }
 
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.h b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
index 0526fd8..da5b8ee 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.h
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
@@ -58,6 +58,7 @@
 
     uint32_t mSource{};
     int32_t mKeyboardType{};
+    std::optional<KeyboardLayoutInfo> mKeyboardLayoutInfo;
 
     std::vector<KeyDown> mKeyDowns{}; // keys that are down
     int32_t mMetaState{};
diff --git a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
index b193dff..633efc6 100644
--- a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
@@ -16,10 +16,8 @@
 
 #include "../Macros.h"
 
-#include "MultiTouchInputMapper.h"
-#if defined(__ANDROID__)
 #include <android/sysprop/InputProperties.sysprop.h>
-#endif
+#include "MultiTouchInputMapper.h"
 
 namespace android {
 
@@ -218,12 +216,7 @@
 
 bool MultiTouchInputMapper::shouldSimulateStylusWithTouch() const {
     static const bool SIMULATE_STYLUS_WITH_TOUCH =
-#if defined(__ANDROID__)
             sysprop::InputProperties::simulate_stylus_with_touch().value_or(false);
-#else
-            // Disable this developer feature where sysproperties are not available
-            false;
-#endif
     return SIMULATE_STYLUS_WITH_TOUCH &&
             mParameters.deviceType == Parameters::DeviceType::TOUCH_SCREEN;
 }
diff --git a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.cpp b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.cpp
new file mode 100644
index 0000000..c12e95d
--- /dev/null
+++ b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.cpp
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <input/DisplayViewport.h>
+#include <stdint.h>
+#include <ui/Rotation.h>
+
+#include "EventHub.h"
+#include "InputListener.h"
+#include "InputReaderContext.h"
+
+namespace android {
+
+namespace {
+
+[[nodiscard]] std::list<NotifyArgs> synthesizeButtonKey(
+        InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
+        int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
+        int32_t lastButtonState, int32_t currentButtonState, int32_t buttonState, int32_t keyCode) {
+    std::list<NotifyArgs> out;
+    if ((action == AKEY_EVENT_ACTION_DOWN && !(lastButtonState & buttonState) &&
+         (currentButtonState & buttonState)) ||
+        (action == AKEY_EVENT_ACTION_UP && (lastButtonState & buttonState) &&
+         !(currentButtonState & buttonState))) {
+        out.push_back(NotifyKeyArgs(context->getNextId(), when, readTime, deviceId, source,
+                                    displayId, policyFlags, action, 0, keyCode, 0,
+                                    context->getGlobalMetaState(), when));
+    }
+    return out;
+}
+
+} // namespace
+
+ui::Rotation getInverseRotation(ui::Rotation orientation) {
+    switch (orientation) {
+        case ui::ROTATION_90:
+            return ui::ROTATION_270;
+        case ui::ROTATION_270:
+            return ui::ROTATION_90;
+        default:
+            return orientation;
+    }
+}
+
+void rotateDelta(ui::Rotation orientation, float* deltaX, float* deltaY) {
+    float temp;
+    switch (orientation) {
+        case ui::ROTATION_90:
+            temp = *deltaX;
+            *deltaX = *deltaY;
+            *deltaY = -temp;
+            break;
+
+        case ui::ROTATION_180:
+            *deltaX = -*deltaX;
+            *deltaY = -*deltaY;
+            break;
+
+        case ui::ROTATION_270:
+            temp = *deltaX;
+            *deltaX = -*deltaY;
+            *deltaY = temp;
+            break;
+
+        default:
+            break;
+    }
+}
+
+bool isPointerDown(int32_t buttonState) {
+    return buttonState &
+            (AMOTION_EVENT_BUTTON_PRIMARY | AMOTION_EVENT_BUTTON_SECONDARY |
+             AMOTION_EVENT_BUTTON_TERTIARY);
+}
+
+[[nodiscard]] std::list<NotifyArgs> synthesizeButtonKeys(
+        InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
+        int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
+        int32_t lastButtonState, int32_t currentButtonState) {
+    std::list<NotifyArgs> out;
+    out += synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId,
+                               policyFlags, lastButtonState, currentButtonState,
+                               AMOTION_EVENT_BUTTON_BACK, AKEYCODE_BACK);
+    out += synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId,
+                               policyFlags, lastButtonState, currentButtonState,
+                               AMOTION_EVENT_BUTTON_FORWARD, AKEYCODE_FORWARD);
+    return out;
+}
+
+std::tuple<nsecs_t /*eventTime*/, nsecs_t /*readTime*/> applyBluetoothTimestampSmoothening(
+        const InputDeviceIdentifier& identifier, nsecs_t currentEventTime, nsecs_t readTime,
+        nsecs_t lastEventTime) {
+    if (identifier.bus != BUS_BLUETOOTH) {
+        return {currentEventTime, readTime};
+    }
+
+    // Assume the fastest rate at which a Bluetooth touch device can report input events is one
+    // every 4 milliseconds, or 250 Hz. Timestamps for successive events from a Bluetooth device
+    // will be separated by at least this amount.
+    constexpr static nsecs_t MIN_BLUETOOTH_TIMESTAMP_DELTA = ms2ns(4);
+    // We define a maximum smoothing time delta so that we don't generate events too far into the
+    // future.
+    constexpr static nsecs_t MAX_BLUETOOTH_SMOOTHING_DELTA = ms2ns(32);
+    const nsecs_t smoothenedEventTime =
+            std::min(std::max(currentEventTime, lastEventTime + MIN_BLUETOOTH_TIMESTAMP_DELTA),
+                     currentEventTime + MAX_BLUETOOTH_SMOOTHING_DELTA);
+    // If we are modifying the event time, treat this event as a synthetically generated event for
+    // latency tracking purposes and use the event time as the read time (zero read latency).
+    const nsecs_t smoothenedReadTime =
+            smoothenedEventTime != currentEventTime ? currentEventTime : readTime;
+    return {smoothenedEventTime, smoothenedReadTime};
+}
+
+} // namespace android
diff --git a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
index 1c3ca97..3023e68 100644
--- a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
+++ b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
@@ -26,81 +26,18 @@
 
 namespace android {
 
-// --- Static Definitions ---
+ui::Rotation getInverseRotation(ui::Rotation orientation);
 
-static ui::Rotation getInverseRotation(ui::Rotation orientation) {
-    switch (orientation) {
-        case ui::ROTATION_90:
-            return ui::ROTATION_270;
-        case ui::ROTATION_270:
-            return ui::ROTATION_90;
-        default:
-            return orientation;
-    }
-}
-
-static void rotateDelta(ui::Rotation orientation, float* deltaX, float* deltaY) {
-    float temp;
-    switch (orientation) {
-        case ui::ROTATION_90:
-            temp = *deltaX;
-            *deltaX = *deltaY;
-            *deltaY = -temp;
-            break;
-
-        case ui::ROTATION_180:
-            *deltaX = -*deltaX;
-            *deltaY = -*deltaY;
-            break;
-
-        case ui::ROTATION_270:
-            temp = *deltaX;
-            *deltaX = -*deltaY;
-            *deltaY = temp;
-            break;
-
-        default:
-            break;
-    }
-}
+void rotateDelta(ui::Rotation orientation, float* deltaX, float* deltaY);
 
 // Returns true if the pointer should be reported as being down given the specified
 // button states.  This determines whether the event is reported as a touch event.
-static bool isPointerDown(int32_t buttonState) {
-    return buttonState &
-            (AMOTION_EVENT_BUTTON_PRIMARY | AMOTION_EVENT_BUTTON_SECONDARY |
-             AMOTION_EVENT_BUTTON_TERTIARY);
-}
+bool isPointerDown(int32_t buttonState);
 
-[[nodiscard]] static std::list<NotifyArgs> synthesizeButtonKey(
+[[nodiscard]] std::list<NotifyArgs> synthesizeButtonKeys(
         InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
         int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
-        int32_t lastButtonState, int32_t currentButtonState, int32_t buttonState, int32_t keyCode) {
-    std::list<NotifyArgs> out;
-    if ((action == AKEY_EVENT_ACTION_DOWN && !(lastButtonState & buttonState) &&
-         (currentButtonState & buttonState)) ||
-        (action == AKEY_EVENT_ACTION_UP && (lastButtonState & buttonState) &&
-         !(currentButtonState & buttonState))) {
-        out.push_back(NotifyKeyArgs(context->getNextId(), when, readTime, deviceId, source,
-                                    displayId, policyFlags, action, 0, keyCode, 0,
-                                    context->getGlobalMetaState(), when));
-    }
-    return out;
-}
-
-[[nodiscard]] static std::list<NotifyArgs> synthesizeButtonKeys(
-        InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
-        int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
-        int32_t lastButtonState, int32_t currentButtonState) {
-    std::list<NotifyArgs> out;
-    out += synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId,
-                               policyFlags, lastButtonState, currentButtonState,
-                               AMOTION_EVENT_BUTTON_BACK, AKEYCODE_BACK);
-    out += synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId,
-                               policyFlags, lastButtonState, currentButtonState,
-                               AMOTION_EVENT_BUTTON_FORWARD, AKEYCODE_FORWARD);
-    return out;
-}
+        int32_t lastButtonState, int32_t currentButtonState);
 
 // For devices connected over Bluetooth, although they may produce events at a consistent rate,
 // the events might end up reaching Android in a "batched" manner through the Bluetooth
@@ -111,28 +48,8 @@
 // coordinates result in extremely large instantaneous velocities, which can negatively impact
 // user experience. To avoid this, we augment the timestamps so that subsequent event timestamps
 // differ by at least a minimum delta value.
-static std::tuple<nsecs_t /*eventTime*/, nsecs_t /*readTime*/> applyBluetoothTimestampSmoothening(
+std::tuple<nsecs_t /*eventTime*/, nsecs_t /*readTime*/> applyBluetoothTimestampSmoothening(
         const InputDeviceIdentifier& identifier, nsecs_t currentEventTime, nsecs_t readTime,
-        nsecs_t lastEventTime) {
-    if (identifier.bus != BUS_BLUETOOTH) {
-        return {currentEventTime, readTime};
-    }
-
-    // Assume the fastest rate at which a Bluetooth touch device can report input events is one
-    // every 4 milliseconds, or 250 Hz. Timestamps for successive events from a Bluetooth device
-    // will be separated by at least this amount.
-    constexpr static nsecs_t MIN_BLUETOOTH_TIMESTAMP_DELTA = ms2ns(4);
-    // We define a maximum smoothing time delta so that we don't generate events too far into the
-    // future.
-    constexpr static nsecs_t MAX_BLUETOOTH_SMOOTHING_DELTA = ms2ns(32);
-    const nsecs_t smoothenedEventTime =
-            std::min(std::max(currentEventTime, lastEventTime + MIN_BLUETOOTH_TIMESTAMP_DELTA),
-                     currentEventTime + MAX_BLUETOOTH_SMOOTHING_DELTA);
-    // If we are modifying the event time, treat this event as a synthetically generated event for
-    // latency tracking purposes and use the event time as the read time (zero read latency).
-    const nsecs_t smoothenedReadTime =
-            smoothenedEventTime != currentEventTime ? currentEventTime : readTime;
-    return {smoothenedEventTime, smoothenedReadTime};
-}
+        nsecs_t lastEventTime);
 
 } // namespace android
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.cpp b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
index cefc44e..9a7af40 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
@@ -51,9 +51,8 @@
     return base::StringPrintf("%dx%d", size.width, size.height);
 }
 
-static bool isPointInRect(const Rect& rect, int32_t x, int32_t y) {
-    // Consider all four sides as "inclusive".
-    return x >= rect.left && x <= rect.right && y >= rect.top && y <= rect.bottom;
+static bool isPointInRect(const Rect& rect, vec2 p) {
+    return p.x >= rect.left && p.x < rect.right && p.y >= rect.top && p.y < rect.bottom;
 }
 
 template <typename T>
@@ -81,29 +80,12 @@
     return value >= 8 ? value - 16 : value;
 }
 
-static std::tuple<ui::Size /*displayBounds*/, Rect /*physicalFrame*/> getNaturalDisplayInfo(
-        const DisplayViewport& viewport, ui::Rotation naturalOrientation) {
+static ui::Size getNaturalDisplaySize(const DisplayViewport& viewport) {
     ui::Size rotatedDisplaySize{viewport.deviceWidth, viewport.deviceHeight};
-    if (naturalOrientation == ui::ROTATION_90 || naturalOrientation == ui::ROTATION_270) {
+    if (viewport.orientation == ui::ROTATION_90 || viewport.orientation == ui::ROTATION_270) {
         std::swap(rotatedDisplaySize.width, rotatedDisplaySize.height);
     }
-
-    ui::Transform rotate(ui::Transform::toRotationFlags(naturalOrientation),
-                         rotatedDisplaySize.width, rotatedDisplaySize.height);
-
-    Rect physicalFrame{viewport.physicalLeft, viewport.physicalTop, viewport.physicalRight,
-                       viewport.physicalBottom};
-    physicalFrame = rotate.transform(physicalFrame);
-
-    LOG_ALWAYS_FATAL_IF(!physicalFrame.isValid());
-    if (physicalFrame.isEmpty()) {
-        ALOGE("Viewport is not set properly: %s", viewport.toString().c_str());
-        physicalFrame.right =
-                physicalFrame.left + (physicalFrame.width() == 0 ? 1 : physicalFrame.width());
-        physicalFrame.bottom =
-                physicalFrame.top + (physicalFrame.height() == 0 ? 1 : physicalFrame.height());
-    }
-    return {rotatedDisplaySize, physicalFrame};
+    return rotatedDisplaySize;
 }
 
 // --- RawPointerData ---
@@ -197,18 +179,6 @@
     if (mCursorScrollAccumulator.haveRelativeHWheel()) {
         info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
     }
-    if (mCalibration.coverageCalibration == Calibration::CoverageCalibration::BOX) {
-        const InputDeviceInfo::MotionRange& x = mOrientedRanges.x;
-        const InputDeviceInfo::MotionRange& y = mOrientedRanges.y;
-        info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_1, mSource, x.min, x.max, x.flat, x.fuzz,
-                             x.resolution);
-        info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_2, mSource, y.min, y.max, y.flat, y.fuzz,
-                             y.resolution);
-        info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_3, mSource, x.min, x.max, x.flat, x.fuzz,
-                             x.resolution);
-        info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_4, mSource, y.min, y.max, y.flat, y.fuzz,
-                             y.resolution);
-    }
     info->setButtonUnderPad(mParameters.hasButtonUnderPad);
     info->setSupportsUsi(mParameters.supportsUsi);
 }
@@ -224,10 +194,10 @@
     dumpDisplay(dump);
 
     dump += StringPrintf(INDENT3 "Translation and Scaling Factors:\n");
-    dump += StringPrintf(INDENT4 "XScale: %0.3f\n", mXScale);
-    dump += StringPrintf(INDENT4 "YScale: %0.3f\n", mYScale);
-    dump += StringPrintf(INDENT4 "XPrecision: %0.3f\n", mXPrecision);
-    dump += StringPrintf(INDENT4 "YPrecision: %0.3f\n", mYPrecision);
+    mRawToDisplay.dump(dump, "RawToDisplay Transform:", INDENT4);
+    mRawRotation.dump(dump, "RawRotation Transform:", INDENT4);
+    dump += StringPrintf(INDENT4 "OrientedXPrecision: %0.3f\n", mOrientedXPrecision);
+    dump += StringPrintf(INDENT4 "OrientedYPrecision: %0.3f\n", mOrientedYPrecision);
     dump += StringPrintf(INDENT4 "GeometricScale: %0.3f\n", mGeometricScale);
     dump += StringPrintf(INDENT4 "PressureScale: %0.3f\n", mPressureScale);
     dump += StringPrintf(INDENT4 "SizeScale: %0.3f\n", mSizeScale);
@@ -392,33 +362,10 @@
         }
     }
 
-    if (getDeviceContext().hasInputProperty(INPUT_PROP_DIRECT)) {
-        // The device is a touch screen.
-        mParameters.deviceType = Parameters::DeviceType::TOUCH_SCREEN;
-    } else if (getDeviceContext().hasInputProperty(INPUT_PROP_POINTER)) {
-        // The device is a pointing device like a track pad.
-        mParameters.deviceType = Parameters::DeviceType::POINTER;
-    } else {
-        // The device is a touch pad of unknown purpose.
-        mParameters.deviceType = Parameters::DeviceType::POINTER;
-    }
+    configureDeviceType();
 
     mParameters.hasButtonUnderPad = getDeviceContext().hasInputProperty(INPUT_PROP_BUTTONPAD);
 
-    std::string deviceTypeString;
-    if (getDeviceContext().getConfiguration().tryGetProperty("touch.deviceType",
-                                                             deviceTypeString)) {
-        if (deviceTypeString == "touchScreen") {
-            mParameters.deviceType = Parameters::DeviceType::TOUCH_SCREEN;
-        } else if (deviceTypeString == "touchNavigation") {
-            mParameters.deviceType = Parameters::DeviceType::TOUCH_NAVIGATION;
-        } else if (deviceTypeString == "pointer") {
-            mParameters.deviceType = Parameters::DeviceType::POINTER;
-        } else if (deviceTypeString != "default") {
-            ALOGW("Invalid value for touch.deviceType: '%s'", deviceTypeString.c_str());
-        }
-    }
-
     mParameters.orientationAware = mParameters.deviceType == Parameters::DeviceType::TOUCH_SCREEN;
     getDeviceContext().getConfiguration().tryGetProperty("touch.orientationAware",
                                                          mParameters.orientationAware);
@@ -444,7 +391,9 @@
     mParameters.associatedDisplayIsExternal = false;
     if (mParameters.orientationAware ||
         mParameters.deviceType == Parameters::DeviceType::TOUCH_SCREEN ||
-        mParameters.deviceType == Parameters::DeviceType::POINTER) {
+        mParameters.deviceType == Parameters::DeviceType::POINTER ||
+        (mParameters.deviceType == Parameters::DeviceType::TOUCH_NAVIGATION &&
+         getDeviceContext().getAssociatedViewport())) {
         mParameters.hasAssociatedDisplay = true;
         if (mParameters.deviceType == Parameters::DeviceType::TOUCH_SCREEN) {
             mParameters.associatedDisplayIsExternal = getDeviceContext().isExternal();
@@ -473,6 +422,34 @@
                                                          mParameters.enableForInactiveViewport);
 }
 
+void TouchInputMapper::configureDeviceType() {
+    if (getDeviceContext().hasInputProperty(INPUT_PROP_DIRECT)) {
+        // The device is a touch screen.
+        mParameters.deviceType = Parameters::DeviceType::TOUCH_SCREEN;
+    } else if (getDeviceContext().hasInputProperty(INPUT_PROP_POINTER)) {
+        // The device is a pointing device like a track pad.
+        mParameters.deviceType = Parameters::DeviceType::POINTER;
+    } else {
+        // The device is a touch pad of unknown purpose.
+        mParameters.deviceType = Parameters::DeviceType::POINTER;
+    }
+
+    // Type association takes precedence over the device type found in the idc file.
+    std::string deviceTypeString = getDeviceContext().getDeviceTypeAssociation().value_or("");
+    if (deviceTypeString.empty()) {
+        getDeviceContext().getConfiguration().tryGetProperty("touch.deviceType", deviceTypeString);
+    }
+    if (deviceTypeString == "touchScreen") {
+        mParameters.deviceType = Parameters::DeviceType::TOUCH_SCREEN;
+    } else if (deviceTypeString == "touchNavigation") {
+        mParameters.deviceType = Parameters::DeviceType::TOUCH_NAVIGATION;
+    } else if (deviceTypeString == "pointer") {
+        mParameters.deviceType = Parameters::DeviceType::POINTER;
+    } else if (deviceTypeString != "default" && deviceTypeString != "") {
+        ALOGW("Invalid value for touch.deviceType: '%s'", deviceTypeString.c_str());
+    }
+}
+
 void TouchInputMapper::dumpParameters(std::string& dump) {
     dump += INDENT3 "Parameters:\n";
 
@@ -680,10 +657,10 @@
 
 void TouchInputMapper::initializeOrientedRanges() {
     // Configure X and Y factors.
-    mXScale = float(mDisplayBounds.width) / mRawPointerAxes.getRawWidth();
-    mYScale = float(mDisplayBounds.height) / mRawPointerAxes.getRawHeight();
-    mXPrecision = 1.0f / mXScale;
-    mYPrecision = 1.0f / mYScale;
+    const float orientedScaleX = mRawToDisplay.getScaleX();
+    const float orientedScaleY = mRawToDisplay.getScaleY();
+    mOrientedXPrecision = 1.0f / orientedScaleX;
+    mOrientedYPrecision = 1.0f / orientedScaleY;
 
     mOrientedRanges.x.axis = AMOTION_EVENT_AXIS_X;
     mOrientedRanges.x.source = mSource;
@@ -693,7 +670,7 @@
     // Scale factor for terms that are not oriented in a particular axis.
     // If the pixels are square then xScale == yScale otherwise we fake it
     // by choosing an average.
-    mGeometricScale = avg(mXScale, mYScale);
+    mGeometricScale = avg(orientedScaleX, orientedScaleY);
 
     initializeSizeRanges();
 
@@ -810,44 +787,74 @@
     // Compute oriented precision, scales and ranges.
     // Note that the maximum value reported is an inclusive maximum value so it is one
     // unit less than the total width or height of the display.
+    // TODO(b/20508709): Calculate the oriented ranges using the input device's raw frame.
     switch (mInputDeviceOrientation) {
         case ui::ROTATION_90:
         case ui::ROTATION_270:
-            mOrientedXPrecision = mYPrecision;
-            mOrientedYPrecision = mXPrecision;
-
             mOrientedRanges.x.min = 0;
             mOrientedRanges.x.max = mDisplayBounds.height - 1;
             mOrientedRanges.x.flat = 0;
             mOrientedRanges.x.fuzz = 0;
-            mOrientedRanges.x.resolution = mRawPointerAxes.y.resolution * mYScale;
+            mOrientedRanges.x.resolution = mRawPointerAxes.y.resolution * mRawToDisplay.getScaleY();
 
             mOrientedRanges.y.min = 0;
             mOrientedRanges.y.max = mDisplayBounds.width - 1;
             mOrientedRanges.y.flat = 0;
             mOrientedRanges.y.fuzz = 0;
-            mOrientedRanges.y.resolution = mRawPointerAxes.x.resolution * mXScale;
+            mOrientedRanges.y.resolution = mRawPointerAxes.x.resolution * mRawToDisplay.getScaleX();
             break;
 
         default:
-            mOrientedXPrecision = mXPrecision;
-            mOrientedYPrecision = mYPrecision;
-
             mOrientedRanges.x.min = 0;
             mOrientedRanges.x.max = mDisplayBounds.width - 1;
             mOrientedRanges.x.flat = 0;
             mOrientedRanges.x.fuzz = 0;
-            mOrientedRanges.x.resolution = mRawPointerAxes.x.resolution * mXScale;
+            mOrientedRanges.x.resolution = mRawPointerAxes.x.resolution * mRawToDisplay.getScaleX();
 
             mOrientedRanges.y.min = 0;
             mOrientedRanges.y.max = mDisplayBounds.height - 1;
             mOrientedRanges.y.flat = 0;
             mOrientedRanges.y.fuzz = 0;
-            mOrientedRanges.y.resolution = mRawPointerAxes.y.resolution * mYScale;
+            mOrientedRanges.y.resolution = mRawPointerAxes.y.resolution * mRawToDisplay.getScaleY();
             break;
     }
 }
 
+void TouchInputMapper::computeInputTransforms() {
+    const ui::Size rawSize{mRawPointerAxes.getRawWidth(), mRawPointerAxes.getRawHeight()};
+
+    ui::Size rotatedRawSize = rawSize;
+    if (mInputDeviceOrientation == ui::ROTATION_270 || mInputDeviceOrientation == ui::ROTATION_90) {
+        std::swap(rotatedRawSize.width, rotatedRawSize.height);
+    }
+    const auto rotationFlags = ui::Transform::toRotationFlags(-mInputDeviceOrientation);
+    mRawRotation = ui::Transform{rotationFlags};
+
+    // Step 1: Undo the raw offset so that the raw coordinate space now starts at (0, 0).
+    ui::Transform undoRawOffset;
+    undoRawOffset.set(-mRawPointerAxes.x.minValue, -mRawPointerAxes.y.minValue);
+
+    // Step 2: Rotate the raw coordinates to the expected orientation.
+    ui::Transform rotate;
+    // When rotating raw coordinates, the raw size will be used as an offset.
+    // Account for the extra unit added to the raw range when the raw size was calculated.
+    rotate.set(rotationFlags, rotatedRawSize.width - 1, rotatedRawSize.height - 1);
+
+    // Step 3: Scale the raw coordinates to the display space.
+    ui::Transform scaleToDisplay;
+    const float xScale = static_cast<float>(mDisplayBounds.width) / rotatedRawSize.width;
+    const float yScale = static_cast<float>(mDisplayBounds.height) / rotatedRawSize.height;
+    scaleToDisplay.set(xScale, 0, 0, yScale);
+
+    mRawToDisplay = (scaleToDisplay * (rotate * undoRawOffset));
+
+    // Calculate the transform that takes raw coordinates to the rotated display space.
+    ui::Transform displayToRotatedDisplay;
+    displayToRotatedDisplay.set(ui::Transform::toRotationFlags(-mViewport.orientation),
+                                mViewport.deviceWidth, mViewport.deviceHeight);
+    mRawToRotatedDisplay = displayToRotatedDisplay * mRawToDisplay;
+}
+
 void TouchInputMapper::configureInputDevice(nsecs_t when, bool* outResetNeeded) {
     const DeviceMode oldDeviceMode = mDeviceMode;
 
@@ -919,14 +926,9 @@
         if (mDeviceMode == DeviceMode::DIRECT || mDeviceMode == DeviceMode::POINTER) {
             const auto oldDisplayBounds = mDisplayBounds;
 
-            // Apply the inverse of the input device orientation so that the input device is
-            // configured in the same orientation as the viewport. The input device orientation will
-            // be re-applied by mInputDeviceOrientation.
-            const ui::Rotation naturalDeviceOrientation =
-                    mViewport.orientation - mParameters.orientation;
-
-            std::tie(mDisplayBounds, mPhysicalFrameInDisplay) =
-                    getNaturalDisplayInfo(mViewport, naturalDeviceOrientation);
+            mDisplayBounds = getNaturalDisplaySize(mViewport);
+            mPhysicalFrameInRotatedDisplay = {mViewport.physicalLeft, mViewport.physicalTop,
+                                              mViewport.physicalRight, mViewport.physicalBottom};
 
             // InputReader works in the un-rotated display coordinate space, so we don't need to do
             // anything if the device is already orientation-aware. If the device is not
@@ -943,10 +945,14 @@
 
             // Apply the input device orientation for the device.
             mInputDeviceOrientation = mInputDeviceOrientation + mParameters.orientation;
+            computeInputTransforms();
         } else {
             mDisplayBounds = rawSize;
-            mPhysicalFrameInDisplay = Rect{mDisplayBounds};
+            mPhysicalFrameInRotatedDisplay = Rect{mDisplayBounds};
             mInputDeviceOrientation = ui::ROTATION_0;
+            mRawToDisplay.reset();
+            mRawToDisplay.set(-mRawPointerAxes.x.minValue, -mRawPointerAxes.y.minValue);
+            mRawToRotatedDisplay = mRawToDisplay;
         }
     }
 
@@ -1029,7 +1035,8 @@
 void TouchInputMapper::dumpDisplay(std::string& dump) {
     dump += StringPrintf(INDENT3 "%s\n", mViewport.toString().c_str());
     dump += StringPrintf(INDENT3 "DisplayBounds: %s\n", toString(mDisplayBounds).c_str());
-    dump += StringPrintf(INDENT3 "PhysicalFrame: %s\n", toString(mPhysicalFrameInDisplay).c_str());
+    dump += StringPrintf(INDENT3 "PhysicalFrameInRotatedDisplay: %s\n",
+                         toString(mPhysicalFrameInRotatedDisplay).c_str());
     dump += StringPrintf(INDENT3 "InputDeviceOrientation: %d\n", mInputDeviceOrientation);
 }
 
@@ -1190,19 +1197,6 @@
     if (in.tryGetProperty("touch.distance.scale", distanceScale)) {
         out.distanceScale = distanceScale;
     }
-
-    out.coverageCalibration = Calibration::CoverageCalibration::DEFAULT;
-    std::string coverageCalibrationString;
-    if (in.tryGetProperty("touch.coverage.calibration", coverageCalibrationString)) {
-        if (coverageCalibrationString == "none") {
-            out.coverageCalibration = Calibration::CoverageCalibration::NONE;
-        } else if (coverageCalibrationString == "box") {
-            out.coverageCalibration = Calibration::CoverageCalibration::BOX;
-        } else if (coverageCalibrationString != "default") {
-            ALOGW("Invalid value for touch.coverage.calibration: '%s'",
-                  coverageCalibrationString.c_str());
-        }
-    }
 }
 
 void TouchInputMapper::resolveCalibration() {
@@ -1241,11 +1235,6 @@
     } else {
         mCalibration.distanceCalibration = Calibration::DistanceCalibration::NONE;
     }
-
-    // Coverage
-    if (mCalibration.coverageCalibration == Calibration::CoverageCalibration::DEFAULT) {
-        mCalibration.coverageCalibration = Calibration::CoverageCalibration::NONE;
-    }
 }
 
 void TouchInputMapper::dumpCalibration(std::string& dump) {
@@ -1316,17 +1305,6 @@
     if (mCalibration.distanceScale) {
         dump += StringPrintf(INDENT4 "touch.distance.scale: %0.3f\n", *mCalibration.distanceScale);
     }
-
-    switch (mCalibration.coverageCalibration) {
-        case Calibration::CoverageCalibration::NONE:
-            dump += INDENT4 "touch.coverage.calibration: none\n";
-            break;
-        case Calibration::CoverageCalibration::BOX:
-            dump += INDENT4 "touch.coverage.calibration: box\n";
-            break;
-        default:
-            ALOG_ASSERT(false);
-    }
 }
 
 void TouchInputMapper::dumpAffineTransformation(std::string& dump) {
@@ -2283,20 +2261,20 @@
         if (mHaveTilt) {
             float tiltXAngle = (in.tiltX - mTiltXCenter) * mTiltXScale;
             float tiltYAngle = (in.tiltY - mTiltYCenter) * mTiltYScale;
-            orientation = atan2f(-sinf(tiltXAngle), sinf(tiltYAngle));
+            orientation = transformAngle(mRawRotation, atan2f(-sinf(tiltXAngle), sinf(tiltYAngle)));
             tilt = acosf(cosf(tiltXAngle) * cosf(tiltYAngle));
         } else {
             tilt = 0;
 
             switch (mCalibration.orientationCalibration) {
                 case Calibration::OrientationCalibration::INTERPOLATED:
-                    orientation = in.orientation * mOrientationScale;
+                    orientation = transformAngle(mRawRotation, in.orientation * mOrientationScale);
                     break;
                 case Calibration::OrientationCalibration::VECTOR: {
                     int32_t c1 = signExtendNybble((in.orientation & 0xf0) >> 4);
                     int32_t c2 = signExtendNybble(in.orientation & 0x0f);
                     if (c1 != 0 || c2 != 0) {
-                        orientation = atan2f(c1, c2) * 0.5f;
+                        orientation = transformAngle(mRawRotation, atan2f(c1, c2) * 0.5f);
                         float confidence = hypotf(c1, c2);
                         float scale = 1.0f + confidence / 16.0f;
                         touchMajor *= scale;
@@ -2323,76 +2301,16 @@
                 distance = 0;
         }
 
-        // Coverage
-        int32_t rawLeft, rawTop, rawRight, rawBottom;
-        switch (mCalibration.coverageCalibration) {
-            case Calibration::CoverageCalibration::BOX:
-                rawLeft = (in.toolMinor & 0xffff0000) >> 16;
-                rawRight = in.toolMinor & 0x0000ffff;
-                rawBottom = in.toolMajor & 0x0000ffff;
-                rawTop = (in.toolMajor & 0xffff0000) >> 16;
-                break;
-            default:
-                rawLeft = rawTop = rawRight = rawBottom = 0;
-                break;
-        }
-
-        // Adjust X,Y coords for device calibration
-        // TODO: Adjust coverage coords?
-        float xTransformed = in.x, yTransformed = in.y;
-        mAffineTransform.applyTo(xTransformed, yTransformed);
-        rotateAndScale(xTransformed, yTransformed);
-
-        // Adjust X, Y, and coverage coords for input device orientation.
-        float left, top, right, bottom;
-
-        switch (mInputDeviceOrientation) {
-            case ui::ROTATION_90:
-                left = float(rawTop - mRawPointerAxes.y.minValue) * mYScale;
-                right = float(rawBottom - mRawPointerAxes.y.minValue) * mYScale;
-                bottom = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale;
-                top = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale;
-                orientation -= M_PI_2;
-                if (mOrientedRanges.orientation && orientation < mOrientedRanges.orientation->min) {
-                    orientation +=
-                            (mOrientedRanges.orientation->max - mOrientedRanges.orientation->min);
-                }
-                break;
-            case ui::ROTATION_180:
-                left = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale;
-                right = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale;
-                bottom = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale;
-                top = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale;
-                orientation -= M_PI;
-                if (mOrientedRanges.orientation && orientation < mOrientedRanges.orientation->min) {
-                    orientation +=
-                            (mOrientedRanges.orientation->max - mOrientedRanges.orientation->min);
-                }
-                break;
-            case ui::ROTATION_270:
-                left = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale;
-                right = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale;
-                bottom = float(rawRight - mRawPointerAxes.x.minValue) * mXScale;
-                top = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale;
-                orientation += M_PI_2;
-                if (mOrientedRanges.orientation && orientation > mOrientedRanges.orientation->max) {
-                    orientation -=
-                            (mOrientedRanges.orientation->max - mOrientedRanges.orientation->min);
-                }
-                break;
-            default:
-                left = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale;
-                right = float(rawRight - mRawPointerAxes.x.minValue) * mXScale;
-                bottom = float(rawBottom - mRawPointerAxes.y.minValue) * mYScale;
-                top = float(rawTop - mRawPointerAxes.y.minValue) * mYScale;
-                break;
-        }
+        // Adjust X,Y coords for device calibration and convert to the natural display coordinates.
+        vec2 transformed = {in.x, in.y};
+        mAffineTransform.applyTo(transformed.x /*byRef*/, transformed.y /*byRef*/);
+        transformed = mRawToDisplay.transform(transformed);
 
         // Write output coords.
         PointerCoords& out = mCurrentCookedState.cookedPointerData.pointerCoords[i];
         out.clear();
-        out.setAxisValue(AMOTION_EVENT_AXIS_X, xTransformed);
-        out.setAxisValue(AMOTION_EVENT_AXIS_Y, yTransformed);
+        out.setAxisValue(AMOTION_EVENT_AXIS_X, transformed.x);
+        out.setAxisValue(AMOTION_EVENT_AXIS_Y, transformed.y);
         out.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
         out.setAxisValue(AMOTION_EVENT_AXIS_SIZE, size);
         out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, touchMajor);
@@ -2400,23 +2318,16 @@
         out.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, orientation);
         out.setAxisValue(AMOTION_EVENT_AXIS_TILT, tilt);
         out.setAxisValue(AMOTION_EVENT_AXIS_DISTANCE, distance);
-        if (mCalibration.coverageCalibration == Calibration::CoverageCalibration::BOX) {
-            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_1, left);
-            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_2, top);
-            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_3, right);
-            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_4, bottom);
-        } else {
-            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, toolMajor);
-            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, toolMinor);
-        }
+        out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, toolMajor);
+        out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, toolMinor);
 
         // Write output relative fields if applicable.
         uint32_t id = in.id;
         if (mSource == AINPUT_SOURCE_TOUCHPAD &&
             mLastCookedState.cookedPointerData.hasPointerCoordsForId(id)) {
             const PointerCoords& p = mLastCookedState.cookedPointerData.pointerCoordsForId(id);
-            float dx = xTransformed - p.getAxisValue(AMOTION_EVENT_AXIS_X);
-            float dy = yTransformed - p.getAxisValue(AMOTION_EVENT_AXIS_Y);
+            float dx = transformed.x - p.getAxisValue(AMOTION_EVENT_AXIS_X);
+            float dy = transformed.y - p.getAxisValue(AMOTION_EVENT_AXIS_Y);
             out.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, dx);
             out.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, dy);
         }
@@ -3789,48 +3700,10 @@
     return out;
 }
 
-// Transform input device coordinates to display panel coordinates.
-void TouchInputMapper::rotateAndScale(float& x, float& y) const {
-    const float xScaled = float(x - mRawPointerAxes.x.minValue) * mXScale;
-    const float yScaled = float(y - mRawPointerAxes.y.minValue) * mYScale;
-
-    const float xScaledMax = float(mRawPointerAxes.x.maxValue - x) * mXScale;
-    const float yScaledMax = float(mRawPointerAxes.y.maxValue - y) * mYScale;
-
-    // Rotate to display coordinate.
-    // 0 - no swap and reverse.
-    // 90 - swap x/y and reverse y.
-    // 180 - reverse x, y.
-    // 270 - swap x/y and reverse x.
-    switch (mInputDeviceOrientation) {
-        case ui::ROTATION_0:
-            x = xScaled;
-            y = yScaled;
-            break;
-        case ui::ROTATION_90:
-            y = xScaledMax;
-            x = yScaled;
-            break;
-        case ui::ROTATION_180:
-            x = xScaledMax;
-            y = yScaledMax;
-            break;
-        case ui::ROTATION_270:
-            y = xScaled;
-            x = yScaledMax;
-            break;
-        default:
-            assert(false);
-    }
-}
-
 bool TouchInputMapper::isPointInsidePhysicalFrame(int32_t x, int32_t y) const {
-    const float xScaled = (x - mRawPointerAxes.x.minValue) * mXScale;
-    const float yScaled = (y - mRawPointerAxes.y.minValue) * mYScale;
-
     return x >= mRawPointerAxes.x.minValue && x <= mRawPointerAxes.x.maxValue &&
             y >= mRawPointerAxes.y.minValue && y <= mRawPointerAxes.y.maxValue &&
-            isPointInRect(mPhysicalFrameInDisplay, xScaled, yScaled);
+            isPointInRect(mPhysicalFrameInRotatedDisplay, mRawToRotatedDisplay.transform(x, y));
 }
 
 const TouchInputMapper::VirtualKey* TouchInputMapper::findVirtualKeyHit(int32_t x, int32_t y) {
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.h b/services/inputflinger/reader/mapper/TouchInputMapper.h
index 34ba625..6e35b46 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.h
@@ -291,14 +291,6 @@
         DistanceCalibration distanceCalibration;
         std::optional<float> distanceScale;
 
-        enum class CoverageCalibration {
-            DEFAULT,
-            NONE,
-            BOX,
-        };
-
-        CoverageCalibration coverageCalibration;
-
         inline void applySizeScaleAndBias(float& outSize) const {
             if (sizeScale) {
                 outSize *= *sizeScale;
@@ -410,21 +402,26 @@
     // Always starts at (0, 0).
     ui::Size mDisplayBounds{ui::kInvalidSize};
 
-    // The physical frame is the rectangle in the natural display's coordinate space that maps to
+    // The physical frame is the rectangle in the rotated display's coordinate space that maps to
     // the logical display frame.
-    Rect mPhysicalFrameInDisplay{Rect::INVALID_RECT};
+    Rect mPhysicalFrameInRotatedDisplay{Rect::INVALID_RECT};
 
     // The orientation of the input device relative to that of the display panel. It specifies
     // the rotation of the input device coordinates required to produce the display panel
     // orientation, so it will depend on whether the device is orientation aware.
     ui::Rotation mInputDeviceOrientation;
 
-    // Translation and scaling factors, orientation-independent.
-    float mXScale;
-    float mXPrecision;
+    // The transform that maps the input device's raw coordinate space to the un-rotated display's
+    // coordinate space. InputReader generates events in the un-rotated display's coordinate space.
+    ui::Transform mRawToDisplay;
 
-    float mYScale;
-    float mYPrecision;
+    // The transform that maps the input device's raw coordinate space to the rotated display's
+    // coordinate space. This used to perform hit-testing of raw events with the physical frame in
+    // the rotated coordinate space. See mPhysicalFrameInRotatedDisplay.
+    ui::Transform mRawToRotatedDisplay;
+
+    // The transform used for non-planar raw axes, such as orientation and tilt.
+    ui::Transform mRawRotation;
 
     float mGeometricScale;
 
@@ -813,7 +810,9 @@
 
     static void assignPointerIds(const RawState& last, RawState& current);
 
-    void rotateAndScale(float& x, float& y) const;
+    void computeInputTransforms();
+
+    void configureDeviceType();
 };
 
 } // namespace android
diff --git a/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp b/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
index 8c5bce7..c563dba 100644
--- a/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
@@ -16,8 +16,10 @@
 
 #include "../Macros.h"
 
+#include <android/input.h>
+#include <linux/input-event-codes.h>
 #include <log/log_main.h>
-#include <chrono>
+#include "TouchCursorInputMapperCommon.h"
 #include "TouchpadInputMapper.h"
 
 namespace android {
@@ -25,11 +27,11 @@
 namespace {
 
 short getMaxTouchCount(const InputDeviceContext& context) {
-    if (context.hasKeyCode(BTN_TOOL_QUINTTAP)) return 5;
-    if (context.hasKeyCode(BTN_TOOL_QUADTAP)) return 4;
-    if (context.hasKeyCode(BTN_TOOL_TRIPLETAP)) return 3;
-    if (context.hasKeyCode(BTN_TOOL_DOUBLETAP)) return 2;
-    if (context.hasKeyCode(BTN_TOOL_FINGER)) return 1;
+    if (context.hasScanCode(BTN_TOOL_QUINTTAP)) return 5;
+    if (context.hasScanCode(BTN_TOOL_QUADTAP)) return 4;
+    if (context.hasScanCode(BTN_TOOL_TRIPLETAP)) return 3;
+    if (context.hasScanCode(BTN_TOOL_DOUBLETAP)) return 2;
+    if (context.hasScanCode(BTN_TOOL_FINGER)) return 1;
     return 0;
 }
 
@@ -75,9 +77,9 @@
     return props;
 }
 
-void gestureInterpreterCallback(void* clientData, const struct Gesture* gesture) {
-    // TODO(b/251196347): turn the gesture into a NotifyArgs and dispatch it.
-    ALOGD("Gesture ready: %s", gesture->String().c_str());
+void gestureInterpreterCallback(void* clientData, const Gesture* gesture) {
+    TouchpadInputMapper* mapper = static_cast<TouchpadInputMapper*>(clientData);
+    mapper->consumeGesture(gesture);
 }
 
 } // namespace
@@ -85,22 +87,24 @@
 TouchpadInputMapper::TouchpadInputMapper(InputDeviceContext& deviceContext)
       : InputMapper(deviceContext),
         mGestureInterpreter(NewGestureInterpreter(), DeleteGestureInterpreter),
-        mTouchButtonAccumulator(deviceContext) {
+        mPointerController(getContext()->getPointerController(getDeviceId())),
+        mStateConverter(deviceContext),
+        mGestureConverter(*getContext(), getDeviceId()) {
     mGestureInterpreter->Initialize(GESTURES_DEVCLASS_TOUCHPAD);
     mGestureInterpreter->SetHardwareProperties(createHardwareProperties(deviceContext));
-    mGestureInterpreter->SetCallback(gestureInterpreterCallback, nullptr);
+    // Even though we don't explicitly delete copy/move semantics, it's safe to
+    // give away a pointer to TouchpadInputMapper here because
+    // 1) mGestureInterpreter's lifecycle is determined by TouchpadInputMapper, and
+    // 2) TouchpadInputMapper is stored as a unique_ptr and not moved.
+    mGestureInterpreter->SetCallback(gestureInterpreterCallback, this);
     // TODO(b/251196347): set a property provider, so we can change gesture properties.
     // TODO(b/251196347): set a timer provider, so the library can use timers.
+}
 
-    RawAbsoluteAxisInfo slotAxisInfo;
-    getAbsoluteAxisInfo(ABS_MT_SLOT, &slotAxisInfo);
-    if (!slotAxisInfo.valid || slotAxisInfo.maxValue <= 0) {
-        ALOGW("Touchpad \"%s\" doesn't have a valid ABS_MT_SLOT axis, and probably won't work "
-              "properly.",
-              getDeviceName().c_str());
+TouchpadInputMapper::~TouchpadInputMapper() {
+    if (mPointerController != nullptr) {
+        mPointerController->fade(PointerControllerInterface::Transition::IMMEDIATE);
     }
-    mMotionAccumulator.configure(getDeviceContext(), slotAxisInfo.maxValue + 1, true);
-    mTouchButtonAccumulator.configure();
 }
 
 uint32_t TouchpadInputMapper::getSources() const {
@@ -108,73 +112,45 @@
 }
 
 std::list<NotifyArgs> TouchpadInputMapper::reset(nsecs_t when) {
-    mCursorButtonAccumulator.reset(getDeviceContext());
-    mTouchButtonAccumulator.reset();
-    mMscTimestamp = 0;
+    mStateConverter.reset();
+    mGestureConverter.reset();
     return InputMapper::reset(when);
 }
 
 std::list<NotifyArgs> TouchpadInputMapper::process(const RawEvent* rawEvent) {
-    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
-        sync(rawEvent->when);
+    std::optional<SelfContainedHardwareState> state = mStateConverter.processRawEvent(rawEvent);
+    if (state) {
+        return sendHardwareState(rawEvent->when, rawEvent->readTime, *state);
+    } else {
+        return {};
     }
-    if (rawEvent->type == EV_MSC && rawEvent->code == MSC_TIMESTAMP) {
-        mMscTimestamp = rawEvent->value;
-    }
-    mCursorButtonAccumulator.process(rawEvent);
-    mMotionAccumulator.process(rawEvent);
-    mTouchButtonAccumulator.process(rawEvent);
-    return {};
 }
 
-void TouchpadInputMapper::sync(nsecs_t when) {
-    HardwareState hwState;
-    // The gestures library uses doubles to represent timestamps in seconds.
-    hwState.timestamp = std::chrono::duration<stime_t>(std::chrono::nanoseconds(when)).count();
-    hwState.msc_timestamp =
-            std::chrono::duration<stime_t>(std::chrono::microseconds(mMscTimestamp)).count();
+std::list<NotifyArgs> TouchpadInputMapper::sendHardwareState(nsecs_t when, nsecs_t readTime,
+                                                             SelfContainedHardwareState schs) {
+    mProcessing = true;
+    mGestureInterpreter->PushHardwareState(&schs.state);
+    mProcessing = false;
 
-    hwState.buttons_down = 0;
-    if (mCursorButtonAccumulator.isLeftPressed()) {
-        hwState.buttons_down |= GESTURES_BUTTON_LEFT;
-    }
-    if (mCursorButtonAccumulator.isMiddlePressed()) {
-        hwState.buttons_down |= GESTURES_BUTTON_MIDDLE;
-    }
-    if (mCursorButtonAccumulator.isRightPressed()) {
-        hwState.buttons_down |= GESTURES_BUTTON_RIGHT;
-    }
-    if (mCursorButtonAccumulator.isBackPressed() || mCursorButtonAccumulator.isSidePressed()) {
-        hwState.buttons_down |= GESTURES_BUTTON_BACK;
-    }
-    if (mCursorButtonAccumulator.isForwardPressed() || mCursorButtonAccumulator.isExtraPressed()) {
-        hwState.buttons_down |= GESTURES_BUTTON_FORWARD;
-    }
+    return processGestures(when, readTime);
+}
 
-    std::vector<FingerState> fingers;
-    for (size_t i = 0; i < mMotionAccumulator.getSlotCount(); i++) {
-        MultiTouchMotionAccumulator::Slot slot = mMotionAccumulator.getSlot(i);
-        if (slot.isInUse()) {
-            FingerState& fingerState = fingers.emplace_back();
-            fingerState = {};
-            fingerState.touch_major = slot.getTouchMajor();
-            fingerState.touch_minor = slot.getTouchMinor();
-            fingerState.width_major = slot.getToolMajor();
-            fingerState.width_minor = slot.getToolMinor();
-            fingerState.pressure = slot.getPressure();
-            fingerState.orientation = slot.getOrientation();
-            fingerState.position_x = slot.getX();
-            fingerState.position_y = slot.getY();
-            fingerState.tracking_id = slot.getTrackingId();
-        }
+void TouchpadInputMapper::consumeGesture(const Gesture* gesture) {
+    ALOGD("Gesture ready: %s", gesture->String().c_str());
+    if (!mProcessing) {
+        ALOGE("Received gesture outside of the normal processing flow; ignoring it.");
+        return;
     }
-    hwState.fingers = fingers.data();
-    hwState.finger_cnt = fingers.size();
-    hwState.touch_cnt = mTouchButtonAccumulator.getTouchCount();
+    mGesturesToProcess.push_back(*gesture);
+}
 
-    mGestureInterpreter->PushHardwareState(&hwState);
-    mMotionAccumulator.finishSync();
-    mMscTimestamp = 0;
+std::list<NotifyArgs> TouchpadInputMapper::processGestures(nsecs_t when, nsecs_t readTime) {
+    std::list<NotifyArgs> out = {};
+    for (Gesture& gesture : mGesturesToProcess) {
+        out += mGestureConverter.handleGesture(when, readTime, gesture);
+    }
+    mGesturesToProcess.clear();
+    return out;
 }
 
 } // namespace android
diff --git a/services/inputflinger/reader/mapper/TouchpadInputMapper.h b/services/inputflinger/reader/mapper/TouchpadInputMapper.h
index 9d3a4b3..b3bc831 100644
--- a/services/inputflinger/reader/mapper/TouchpadInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchpadInputMapper.h
@@ -16,15 +16,18 @@
 
 #pragma once
 
+#include <list>
 #include <memory>
+#include <vector>
+
+#include <PointerControllerInterface.h>
 
 #include "EventHub.h"
 #include "InputDevice.h"
 #include "InputMapper.h"
 #include "NotifyArgs.h"
-#include "accumulator/CursorButtonAccumulator.h"
-#include "accumulator/MultiTouchMotionAccumulator.h"
-#include "accumulator/TouchButtonAccumulator.h"
+#include "gestures/GestureConverter.h"
+#include "gestures/HardwareStateConverter.h"
 
 #include "include/gestures.h"
 
@@ -33,21 +36,28 @@
 class TouchpadInputMapper : public InputMapper {
 public:
     explicit TouchpadInputMapper(InputDeviceContext& deviceContext);
+    ~TouchpadInputMapper();
 
     uint32_t getSources() const override;
     [[nodiscard]] std::list<NotifyArgs> reset(nsecs_t when) override;
     [[nodiscard]] std::list<NotifyArgs> process(const RawEvent* rawEvent) override;
 
+    void consumeGesture(const Gesture* gesture);
+
 private:
-    void sync(nsecs_t when);
+    [[nodiscard]] std::list<NotifyArgs> sendHardwareState(nsecs_t when, nsecs_t readTime,
+                                                          SelfContainedHardwareState schs);
+    [[nodiscard]] std::list<NotifyArgs> processGestures(nsecs_t when, nsecs_t readTime);
 
     std::unique_ptr<gestures::GestureInterpreter, void (*)(gestures::GestureInterpreter*)>
             mGestureInterpreter;
+    std::shared_ptr<PointerControllerInterface> mPointerController;
 
-    CursorButtonAccumulator mCursorButtonAccumulator;
-    MultiTouchMotionAccumulator mMotionAccumulator;
-    TouchButtonAccumulator mTouchButtonAccumulator;
-    int32_t mMscTimestamp = 0;
+    HardwareStateConverter mStateConverter;
+    GestureConverter mGestureConverter;
+
+    bool mProcessing = false;
+    std::vector<Gesture> mGesturesToProcess;
 };
 
 } // namespace android
diff --git a/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.cpp b/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.cpp
index 2d7d73b..153236c 100644
--- a/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.cpp
+++ b/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.cpp
@@ -25,7 +25,7 @@
     clearButtons();
 }
 
-void CursorButtonAccumulator::reset(InputDeviceContext& deviceContext) {
+void CursorButtonAccumulator::reset(const InputDeviceContext& deviceContext) {
     mBtnLeft = deviceContext.isKeyPressed(BTN_LEFT);
     mBtnRight = deviceContext.isKeyPressed(BTN_RIGHT);
     mBtnMiddle = deviceContext.isKeyPressed(BTN_MIDDLE);
diff --git a/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.h b/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.h
index 1380604..6960644 100644
--- a/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.h
+++ b/services/inputflinger/reader/mapper/accumulator/CursorButtonAccumulator.h
@@ -27,7 +27,7 @@
 class CursorButtonAccumulator {
 public:
     CursorButtonAccumulator();
-    void reset(InputDeviceContext& deviceContext);
+    void reset(const InputDeviceContext& deviceContext);
 
     void process(const RawEvent* rawEvent);
 
diff --git a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp
index 8746729..f6a42bd 100644
--- a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp
+++ b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.cpp
@@ -26,8 +26,8 @@
 MultiTouchMotionAccumulator::MultiTouchMotionAccumulator()
       : mCurrentSlot(-1), mUsingSlotsProtocol(false) {}
 
-void MultiTouchMotionAccumulator::configure(InputDeviceContext& deviceContext, size_t slotCount,
-                                            bool usingSlotsProtocol) {
+void MultiTouchMotionAccumulator::configure(const InputDeviceContext& deviceContext,
+                                            size_t slotCount, bool usingSlotsProtocol) {
     mUsingSlotsProtocol = usingSlotsProtocol;
     mSlots = std::vector<Slot>(slotCount);
 
diff --git a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h
index 62bc780..3c1a2a9 100644
--- a/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h
+++ b/services/inputflinger/reader/mapper/accumulator/MultiTouchMotionAccumulator.h
@@ -72,7 +72,8 @@
 
     MultiTouchMotionAccumulator();
 
-    void configure(InputDeviceContext& deviceContext, size_t slotCount, bool usingSlotsProtocol);
+    void configure(const InputDeviceContext& deviceContext, size_t slotCount,
+                   bool usingSlotsProtocol);
     void process(const RawEvent* rawEvent);
     void finishSync();
 
diff --git a/services/inputflinger/reader/mapper/accumulator/TouchButtonAccumulator.h b/services/inputflinger/reader/mapper/accumulator/TouchButtonAccumulator.h
index 2e70e2e..c2aa2ad 100644
--- a/services/inputflinger/reader/mapper/accumulator/TouchButtonAccumulator.h
+++ b/services/inputflinger/reader/mapper/accumulator/TouchButtonAccumulator.h
@@ -27,7 +27,7 @@
 /* Keeps track of the state of touch, stylus and tool buttons. */
 class TouchButtonAccumulator {
 public:
-    explicit TouchButtonAccumulator(InputDeviceContext& deviceContext)
+    explicit TouchButtonAccumulator(const InputDeviceContext& deviceContext)
           : mDeviceContext(deviceContext){};
 
     void configure();
@@ -65,7 +65,7 @@
 
     HidUsageAccumulator mHidUsageAccumulator{};
 
-    InputDeviceContext& mDeviceContext;
+    const InputDeviceContext& mDeviceContext;
 
     void processMappedKey(int32_t scanCode, bool down);
 };
diff --git a/services/inputflinger/reader/mapper/gestures/GestureConverter.cpp b/services/inputflinger/reader/mapper/gestures/GestureConverter.cpp
new file mode 100644
index 0000000..23216d3
--- /dev/null
+++ b/services/inputflinger/reader/mapper/gestures/GestureConverter.cpp
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "gestures/GestureConverter.h"
+
+#include <android/input.h>
+
+#include "TouchCursorInputMapperCommon.h"
+#include "input/Input.h"
+
+namespace android {
+
+namespace {
+
+uint32_t gesturesButtonToMotionEventButton(uint32_t gesturesButton) {
+    switch (gesturesButton) {
+        case GESTURES_BUTTON_LEFT:
+            return AMOTION_EVENT_BUTTON_PRIMARY;
+        case GESTURES_BUTTON_MIDDLE:
+            return AMOTION_EVENT_BUTTON_TERTIARY;
+        case GESTURES_BUTTON_RIGHT:
+            return AMOTION_EVENT_BUTTON_SECONDARY;
+        case GESTURES_BUTTON_BACK:
+            return AMOTION_EVENT_BUTTON_BACK;
+        case GESTURES_BUTTON_FORWARD:
+            return AMOTION_EVENT_BUTTON_FORWARD;
+        default:
+            return 0;
+    }
+}
+
+} // namespace
+
+GestureConverter::GestureConverter(InputReaderContext& readerContext, int32_t deviceId)
+      : mDeviceId(deviceId),
+        mReaderContext(readerContext),
+        mPointerController(readerContext.getPointerController(deviceId)) {}
+
+void GestureConverter::reset() {
+    mButtonState = 0;
+}
+
+std::list<NotifyArgs> GestureConverter::handleGesture(nsecs_t when, nsecs_t readTime,
+                                                      const Gesture& gesture) {
+    switch (gesture.type) {
+        case kGestureTypeMove:
+            return {handleMove(when, readTime, gesture)};
+        case kGestureTypeButtonsChange:
+            return handleButtonsChange(when, readTime, gesture);
+        default:
+            // TODO(b/251196347): handle more gesture types.
+            return {};
+    }
+}
+
+NotifyArgs GestureConverter::handleMove(nsecs_t when, nsecs_t readTime, const Gesture& gesture) {
+    PointerProperties props;
+    props.clear();
+    props.id = 0;
+    props.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+
+    mPointerController->setPresentation(PointerControllerInterface::Presentation::POINTER);
+    mPointerController->move(gesture.details.move.dx, gesture.details.move.dy);
+    mPointerController->unfade(PointerControllerInterface::Transition::IMMEDIATE);
+    float xCursorPosition, yCursorPosition;
+    mPointerController->getPosition(&xCursorPosition, &yCursorPosition);
+
+    PointerCoords coords;
+    coords.clear();
+    coords.setAxisValue(AMOTION_EVENT_AXIS_X, xCursorPosition);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_Y, yCursorPosition);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, gesture.details.move.dx);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, gesture.details.move.dy);
+    const bool down = isPointerDown(mButtonState);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, down ? 1.0f : 0.0f);
+
+    const int32_t action = down ? AMOTION_EVENT_ACTION_MOVE : AMOTION_EVENT_ACTION_HOVER_MOVE;
+    return makeMotionArgs(when, readTime, action, /* actionButton= */ 0, mButtonState,
+                          /* pointerCount= */ 1, &props, &coords, xCursorPosition, yCursorPosition);
+}
+
+std::list<NotifyArgs> GestureConverter::handleButtonsChange(nsecs_t when, nsecs_t readTime,
+                                                            const Gesture& gesture) {
+    std::list<NotifyArgs> out = {};
+
+    mPointerController->setPresentation(PointerControllerInterface::Presentation::POINTER);
+    mPointerController->unfade(PointerControllerInterface::Transition::IMMEDIATE);
+
+    PointerProperties props;
+    props.clear();
+    props.id = 0;
+    props.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+
+    float xCursorPosition, yCursorPosition;
+    mPointerController->getPosition(&xCursorPosition, &yCursorPosition);
+
+    PointerCoords coords;
+    coords.clear();
+    coords.setAxisValue(AMOTION_EVENT_AXIS_X, xCursorPosition);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_Y, yCursorPosition);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, 0);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, 0);
+    const uint32_t buttonsPressed = gesture.details.buttons.down;
+    bool pointerDown = isPointerDown(mButtonState) ||
+            buttonsPressed &
+                    (GESTURES_BUTTON_LEFT | GESTURES_BUTTON_MIDDLE | GESTURES_BUTTON_RIGHT);
+    coords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pointerDown ? 1.0f : 0.0f);
+
+    uint32_t newButtonState = mButtonState;
+    std::list<NotifyArgs> pressEvents = {};
+    for (uint32_t button = 1; button <= GESTURES_BUTTON_FORWARD; button <<= 1) {
+        if (buttonsPressed & button) {
+            uint32_t actionButton = gesturesButtonToMotionEventButton(button);
+            newButtonState |= actionButton;
+            pressEvents.push_back(makeMotionArgs(when, readTime, AMOTION_EVENT_ACTION_BUTTON_PRESS,
+                                                 actionButton, newButtonState,
+                                                 /* pointerCount= */ 1, &props, &coords,
+                                                 xCursorPosition, yCursorPosition));
+        }
+    }
+    if (!isPointerDown(mButtonState) && isPointerDown(newButtonState)) {
+        mDownTime = when;
+        out.push_back(makeMotionArgs(when, readTime, AMOTION_EVENT_ACTION_DOWN,
+                                     /* actionButton= */ 0, newButtonState, /* pointerCount= */ 1,
+                                     &props, &coords, xCursorPosition, yCursorPosition));
+    }
+    out.splice(out.end(), pressEvents);
+
+    // The same button may be in both down and up in the same gesture, in which case we should treat
+    // it as having gone down and then up. So, we treat a single button change gesture as two state
+    // changes: a set of buttons going down, followed by a set of buttons going up.
+    mButtonState = newButtonState;
+
+    const uint32_t buttonsReleased = gesture.details.buttons.up;
+    for (uint32_t button = 1; button <= GESTURES_BUTTON_FORWARD; button <<= 1) {
+        if (buttonsReleased & button) {
+            uint32_t actionButton = gesturesButtonToMotionEventButton(button);
+            newButtonState &= ~actionButton;
+            out.push_back(makeMotionArgs(when, readTime, AMOTION_EVENT_ACTION_BUTTON_RELEASE,
+                                         actionButton, newButtonState, /* pointerCount= */ 1,
+                                         &props, &coords, xCursorPosition, yCursorPosition));
+        }
+    }
+    if (isPointerDown(mButtonState) && !isPointerDown(newButtonState)) {
+        coords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 0.0f);
+        out.push_back(makeMotionArgs(when, readTime, AMOTION_EVENT_ACTION_UP, /* actionButton= */ 0,
+                                     newButtonState, /* pointerCount= */ 1, &props, &coords,
+                                     xCursorPosition, yCursorPosition));
+    }
+    mButtonState = newButtonState;
+    return out;
+}
+
+NotifyMotionArgs GestureConverter::makeMotionArgs(nsecs_t when, nsecs_t readTime, int32_t action,
+                                                  int32_t actionButton, int32_t buttonState,
+                                                  uint32_t pointerCount,
+                                                  const PointerProperties* pointerProperties,
+                                                  const PointerCoords* pointerCoords,
+                                                  float xCursorPosition, float yCursorPosition) {
+    // TODO(b/260226362): consider what the appropriate source for these events is.
+    const uint32_t source = AINPUT_SOURCE_MOUSE;
+
+    return NotifyMotionArgs(mReaderContext.getNextId(), when, readTime, mDeviceId, source,
+                            mPointerController->getDisplayId(), /* policyFlags= */ 0, action,
+                            /* actionButton= */ actionButton, /* flags= */ 0,
+                            mReaderContext.getGlobalMetaState(), buttonState,
+                            MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, pointerCount,
+                            pointerProperties, pointerCoords,
+                            /* xPrecision= */ 1.0f, /* yPrecision= */ 1.0f, xCursorPosition,
+                            yCursorPosition, /* downTime= */ mDownTime, /* videoFrames= */ {});
+}
+
+} // namespace android
diff --git a/services/inputflinger/reader/mapper/gestures/GestureConverter.h b/services/inputflinger/reader/mapper/gestures/GestureConverter.h
new file mode 100644
index 0000000..dc11f24
--- /dev/null
+++ b/services/inputflinger/reader/mapper/gestures/GestureConverter.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <list>
+#include <memory>
+
+#include <PointerControllerInterface.h>
+#include <utils/Timers.h>
+
+#include "InputReaderContext.h"
+#include "NotifyArgs.h"
+
+#include "include/gestures.h"
+
+namespace android {
+
+// Converts Gesture structs from the gestures library into NotifyArgs and the appropriate
+// PointerController calls.
+class GestureConverter {
+public:
+    GestureConverter(InputReaderContext& readerContext, int32_t deviceId);
+
+    void reset();
+
+    [[nodiscard]] std::list<NotifyArgs> handleGesture(nsecs_t when, nsecs_t readTime,
+                                                      const Gesture& gesture);
+
+private:
+    NotifyArgs handleMove(nsecs_t when, nsecs_t readTime, const Gesture& gesture);
+    [[nodiscard]] std::list<NotifyArgs> handleButtonsChange(nsecs_t when, nsecs_t readTime,
+                                                            const Gesture& gesture);
+
+    NotifyMotionArgs makeMotionArgs(nsecs_t when, nsecs_t readTime, int32_t action,
+                                    int32_t actionButton, int32_t buttonState,
+                                    uint32_t pointerCount,
+                                    const PointerProperties* pointerProperties,
+                                    const PointerCoords* pointerCoords, float xCursorPosition,
+                                    float yCursorPosition);
+
+    const int32_t mDeviceId;
+    InputReaderContext& mReaderContext;
+    std::shared_ptr<PointerControllerInterface> mPointerController;
+
+    // The current button state according to the gestures library, but converted into MotionEvent
+    // button values (AMOTION_EVENT_BUTTON_...).
+    uint32_t mButtonState = 0;
+    nsecs_t mDownTime = 0;
+};
+
+} // namespace android
diff --git a/services/inputflinger/reader/mapper/gestures/HardwareStateConverter.cpp b/services/inputflinger/reader/mapper/gestures/HardwareStateConverter.cpp
new file mode 100644
index 0000000..2e175b8
--- /dev/null
+++ b/services/inputflinger/reader/mapper/gestures/HardwareStateConverter.cpp
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "gestures/HardwareStateConverter.h"
+
+#include <chrono>
+#include <vector>
+
+#include <linux/input-event-codes.h>
+
+namespace android {
+
+HardwareStateConverter::HardwareStateConverter(const InputDeviceContext& deviceContext)
+      : mDeviceContext(deviceContext), mTouchButtonAccumulator(deviceContext) {
+    RawAbsoluteAxisInfo slotAxisInfo;
+    deviceContext.getAbsoluteAxisInfo(ABS_MT_SLOT, &slotAxisInfo);
+    if (!slotAxisInfo.valid || slotAxisInfo.maxValue <= 0) {
+        ALOGW("Touchpad \"%s\" doesn't have a valid ABS_MT_SLOT axis, and probably won't work "
+              "properly.",
+              deviceContext.getName().c_str());
+    }
+    mMotionAccumulator.configure(deviceContext, slotAxisInfo.maxValue + 1, true);
+    mTouchButtonAccumulator.configure();
+}
+
+std::optional<SelfContainedHardwareState> HardwareStateConverter::processRawEvent(
+        const RawEvent* rawEvent) {
+    std::optional<SelfContainedHardwareState> out;
+    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
+        out = produceHardwareState(rawEvent->when);
+        mMotionAccumulator.finishSync();
+        mMscTimestamp = 0;
+    }
+    if (rawEvent->type == EV_MSC && rawEvent->code == MSC_TIMESTAMP) {
+        mMscTimestamp = rawEvent->value;
+    }
+    mCursorButtonAccumulator.process(rawEvent);
+    mMotionAccumulator.process(rawEvent);
+    mTouchButtonAccumulator.process(rawEvent);
+    return out;
+}
+
+SelfContainedHardwareState HardwareStateConverter::produceHardwareState(nsecs_t when) {
+    SelfContainedHardwareState schs;
+    // The gestures library uses doubles to represent timestamps in seconds.
+    schs.state.timestamp = std::chrono::duration<stime_t>(std::chrono::nanoseconds(when)).count();
+    schs.state.msc_timestamp =
+            std::chrono::duration<stime_t>(std::chrono::microseconds(mMscTimestamp)).count();
+
+    schs.state.buttons_down = 0;
+    if (mCursorButtonAccumulator.isLeftPressed()) {
+        schs.state.buttons_down |= GESTURES_BUTTON_LEFT;
+    }
+    if (mCursorButtonAccumulator.isMiddlePressed()) {
+        schs.state.buttons_down |= GESTURES_BUTTON_MIDDLE;
+    }
+    if (mCursorButtonAccumulator.isRightPressed()) {
+        schs.state.buttons_down |= GESTURES_BUTTON_RIGHT;
+    }
+    if (mCursorButtonAccumulator.isBackPressed() || mCursorButtonAccumulator.isSidePressed()) {
+        schs.state.buttons_down |= GESTURES_BUTTON_BACK;
+    }
+    if (mCursorButtonAccumulator.isForwardPressed() || mCursorButtonAccumulator.isExtraPressed()) {
+        schs.state.buttons_down |= GESTURES_BUTTON_FORWARD;
+    }
+
+    schs.fingers.clear();
+    for (size_t i = 0; i < mMotionAccumulator.getSlotCount(); i++) {
+        MultiTouchMotionAccumulator::Slot slot = mMotionAccumulator.getSlot(i);
+        if (slot.isInUse()) {
+            FingerState& fingerState = schs.fingers.emplace_back();
+            fingerState = {};
+            fingerState.touch_major = slot.getTouchMajor();
+            fingerState.touch_minor = slot.getTouchMinor();
+            fingerState.width_major = slot.getToolMajor();
+            fingerState.width_minor = slot.getToolMinor();
+            fingerState.pressure = slot.getPressure();
+            fingerState.orientation = slot.getOrientation();
+            fingerState.position_x = slot.getX();
+            fingerState.position_y = slot.getY();
+            fingerState.tracking_id = slot.getTrackingId();
+        }
+    }
+    schs.state.fingers = schs.fingers.data();
+    schs.state.finger_cnt = schs.fingers.size();
+    schs.state.touch_cnt = mTouchButtonAccumulator.getTouchCount();
+    return schs;
+}
+
+void HardwareStateConverter::reset() {
+    mCursorButtonAccumulator.reset(mDeviceContext);
+    mTouchButtonAccumulator.reset();
+    mMscTimestamp = 0;
+}
+
+} // namespace android
diff --git a/services/inputflinger/reader/mapper/gestures/HardwareStateConverter.h b/services/inputflinger/reader/mapper/gestures/HardwareStateConverter.h
new file mode 100644
index 0000000..8831299
--- /dev/null
+++ b/services/inputflinger/reader/mapper/gestures/HardwareStateConverter.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <optional>
+
+#include <utils/Timers.h>
+
+#include "EventHub.h"
+#include "InputDevice.h"
+#include "accumulator/CursorButtonAccumulator.h"
+#include "accumulator/MultiTouchMotionAccumulator.h"
+#include "accumulator/TouchButtonAccumulator.h"
+
+#include "include/gestures.h"
+
+namespace android {
+
+// A HardwareState struct, but bundled with a vector to contain its FingerStates, so you don't have
+// to worry about where that memory is allocated.
+struct SelfContainedHardwareState {
+    HardwareState state;
+    std::vector<FingerState> fingers;
+};
+
+// Converts RawEvents into the HardwareState structs used by the gestures library.
+class HardwareStateConverter {
+public:
+    HardwareStateConverter(const InputDeviceContext& deviceContext);
+
+    std::optional<SelfContainedHardwareState> processRawEvent(const RawEvent* event);
+    void reset();
+
+private:
+    SelfContainedHardwareState produceHardwareState(nsecs_t when);
+
+    const InputDeviceContext& mDeviceContext;
+    CursorButtonAccumulator mCursorButtonAccumulator;
+    MultiTouchMotionAccumulator mMotionAccumulator;
+    TouchButtonAccumulator mTouchButtonAccumulator;
+    int32_t mMscTimestamp = 0;
+};
+
+} // namespace android
diff --git a/services/inputflinger/tests/Android.bp b/services/inputflinger/tests/Android.bp
index 53d821f..58a5c31 100644
--- a/services/inputflinger/tests/Android.bp
+++ b/services/inputflinger/tests/Android.bp
@@ -44,6 +44,8 @@
         "FakeInputReaderPolicy.cpp",
         "FakePointerController.cpp",
         "FocusResolver_test.cpp",
+        "GestureConverter_test.cpp",
+        "HardwareStateConverter_test.cpp",
         "InputMapperTest.cpp",
         "InputProcessor_test.cpp",
         "InputProcessorConverter_test.cpp",
diff --git a/services/inputflinger/tests/FakeEventHub.cpp b/services/inputflinger/tests/FakeEventHub.cpp
index f6cf1cc..289a780 100644
--- a/services/inputflinger/tests/FakeEventHub.cpp
+++ b/services/inputflinger/tests/FakeEventHub.cpp
@@ -154,6 +154,11 @@
     getDevice(deviceId)->keyCodeMapping.insert_or_assign(fromKeyCode, toKeyCode);
 }
 
+void FakeEventHub::addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const {
+    Device* device = getDevice(deviceId);
+    device->keyRemapping.insert_or_assign(fromKeyCode, toKeyCode);
+}
+
 void FakeEventHub::addLed(int32_t deviceId, int32_t led, bool initialState) {
     getDevice(deviceId)->leds.add(led, initialState);
 }
@@ -299,7 +304,8 @@
         const KeyInfo* key = getKey(device, scanCode, usageCode);
         if (key) {
             if (outKeycode) {
-                *outKeycode = key->keyCode;
+                auto it = device->keyRemapping.find(key->keyCode);
+                *outKeycode = it != device->keyRemapping.end() ? it->second : key->keyCode;
             }
             if (outFlags) {
                 *outFlags = key->flags;
diff --git a/services/inputflinger/tests/FakeEventHub.h b/services/inputflinger/tests/FakeEventHub.h
index 21cb2f1..fb3c859 100644
--- a/services/inputflinger/tests/FakeEventHub.h
+++ b/services/inputflinger/tests/FakeEventHub.h
@@ -59,6 +59,7 @@
         KeyedVector<int32_t, int32_t> absoluteAxisValue;
         KeyedVector<int32_t, KeyInfo> keysByScanCode;
         KeyedVector<int32_t, KeyInfo> keysByUsageCode;
+        std::unordered_map<int32_t, int32_t> keyRemapping;
         KeyedVector<int32_t, bool> leds;
         // fake mapping which would normally come from keyCharacterMap
         std::unordered_map<int32_t, int32_t> keyCodeMapping;
@@ -132,6 +133,7 @@
     void addKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, int32_t keyCode,
                 uint32_t flags);
     void addKeyCodeMapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode);
+    void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const;
     void addVirtualKeyDefinition(int32_t deviceId, const VirtualKeyDefinition& definition);
 
     void addSensorAxis(int32_t deviceId, int32_t absCode, InputDeviceSensorType sensorType,
diff --git a/services/inputflinger/tests/FakeInputReaderPolicy.cpp b/services/inputflinger/tests/FakeInputReaderPolicy.cpp
index 3af4298..f755356 100644
--- a/services/inputflinger/tests/FakeInputReaderPolicy.cpp
+++ b/services/inputflinger/tests/FakeInputReaderPolicy.cpp
@@ -126,11 +126,21 @@
     mConfig.portAssociations.insert({inputPort, displayPort});
 }
 
+void FakeInputReaderPolicy::addDeviceTypeAssociation(const std::string& inputPort,
+                                                     const std::string& type) {
+    mConfig.deviceTypeAssociations.insert({inputPort, type});
+}
+
 void FakeInputReaderPolicy::addInputUniqueIdAssociation(const std::string& inputUniqueId,
                                                         const std::string& displayUniqueId) {
     mConfig.uniqueIdAssociations.insert({inputUniqueId, displayUniqueId});
 }
 
+void FakeInputReaderPolicy::addKeyboardLayoutAssociation(const std::string& inputUniqueId,
+                                                         const KeyboardLayoutInfo& layoutInfo) {
+    mConfig.keyboardLayoutAssociations.insert({inputUniqueId, layoutInfo});
+}
+
 void FakeInputReaderPolicy::addDisabledDevice(int32_t deviceId) {
     mConfig.disabledDevices.insert(deviceId);
 }
diff --git a/services/inputflinger/tests/FakeInputReaderPolicy.h b/services/inputflinger/tests/FakeInputReaderPolicy.h
index c16cda4..862ff0b 100644
--- a/services/inputflinger/tests/FakeInputReaderPolicy.h
+++ b/services/inputflinger/tests/FakeInputReaderPolicy.h
@@ -55,8 +55,11 @@
     bool updateViewport(const DisplayViewport& viewport);
     void addExcludedDeviceName(const std::string& deviceName);
     void addInputPortAssociation(const std::string& inputPort, uint8_t displayPort);
+    void addDeviceTypeAssociation(const std::string& inputPort, const std::string& type);
     void addInputUniqueIdAssociation(const std::string& inputUniqueId,
                                      const std::string& displayUniqueId);
+    void addKeyboardLayoutAssociation(const std::string& inputUniqueId,
+                                      const KeyboardLayoutInfo& layoutInfo);
     void addDisabledDevice(int32_t deviceId);
     void removeDisabledDevice(int32_t deviceId);
     void setPointerController(std::shared_ptr<FakePointerController> controller);
diff --git a/services/inputflinger/tests/FakePointerController.cpp b/services/inputflinger/tests/FakePointerController.cpp
index 635366b..ab7879f 100644
--- a/services/inputflinger/tests/FakePointerController.cpp
+++ b/services/inputflinger/tests/FakePointerController.cpp
@@ -16,6 +16,8 @@
 
 #include "FakePointerController.h"
 
+#include <gtest/gtest.h>
+
 namespace android {
 
 void FakePointerController::setBounds(float minX, float minY, float maxX, float maxY) {
@@ -56,6 +58,13 @@
     mDisplayId = viewport.displayId;
 }
 
+void FakePointerController::assertPosition(float x, float y) {
+    float actualX, actualY;
+    getPosition(&actualX, &actualY);
+    ASSERT_NEAR(x, actualX, 1);
+    ASSERT_NEAR(y, actualY, 1);
+}
+
 bool FakePointerController::getBounds(float* outMinX, float* outMinY, float* outMaxX,
                                       float* outMaxY) const {
     *outMinX = mMinX;
diff --git a/services/inputflinger/tests/FakePointerController.h b/services/inputflinger/tests/FakePointerController.h
index f00870f..d10cbcd 100644
--- a/services/inputflinger/tests/FakePointerController.h
+++ b/services/inputflinger/tests/FakePointerController.h
@@ -38,6 +38,8 @@
     int32_t getDisplayId() const override;
     void setDisplayViewport(const DisplayViewport& viewport) override;
 
+    void assertPosition(float x, float y);
+
 private:
     bool getBounds(float* outMinX, float* outMinY, float* outMaxX, float* outMaxY) const override;
     void move(float deltaX, float deltaY) override;
diff --git a/services/inputflinger/tests/GestureConverter_test.cpp b/services/inputflinger/tests/GestureConverter_test.cpp
new file mode 100644
index 0000000..91efd1a
--- /dev/null
+++ b/services/inputflinger/tests/GestureConverter_test.cpp
@@ -0,0 +1,200 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <memory>
+
+#include <EventHub.h>
+#include <gestures/GestureConverter.h>
+#include <gtest/gtest.h>
+
+#include "FakeEventHub.h"
+#include "FakeInputReaderPolicy.h"
+#include "FakePointerController.h"
+#include "InstrumentedInputReader.h"
+#include "NotifyArgs.h"
+#include "TestConstants.h"
+#include "TestInputListener.h"
+#include "TestInputListenerMatchers.h"
+#include "include/gestures.h"
+
+namespace android {
+
+using testing::AllOf;
+
+class GestureConverterTest : public testing::Test {
+protected:
+    static constexpr int32_t DEVICE_ID = END_RESERVED_ID + 1000;
+    static constexpr stime_t ARBITRARY_GESTURE_TIME = 1.2;
+    static constexpr float POINTER_X = 100;
+    static constexpr float POINTER_Y = 200;
+
+    void SetUp() {
+        mFakeEventHub = std::make_unique<FakeEventHub>();
+        mFakePolicy = sp<FakeInputReaderPolicy>::make();
+        mFakeListener = std::make_unique<TestInputListener>();
+        mReader = std::make_unique<InstrumentedInputReader>(mFakeEventHub, mFakePolicy,
+                                                            *mFakeListener);
+
+        mFakePointerController = std::make_shared<FakePointerController>();
+        mFakePointerController->setBounds(0, 0, 800 - 1, 480 - 1);
+        mFakePointerController->setPosition(POINTER_X, POINTER_Y);
+        mFakePolicy->setPointerController(mFakePointerController);
+    }
+
+    std::shared_ptr<FakeEventHub> mFakeEventHub;
+    sp<FakeInputReaderPolicy> mFakePolicy;
+    std::unique_ptr<TestInputListener> mFakeListener;
+    std::unique_ptr<InstrumentedInputReader> mReader;
+    std::shared_ptr<FakePointerController> mFakePointerController;
+};
+
+TEST_F(GestureConverterTest, Move) {
+    GestureConverter converter(*mReader->getContext(), DEVICE_ID);
+
+    Gesture moveGesture(kGestureMove, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, -5, 10);
+    std::list<NotifyArgs> args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, moveGesture);
+    ASSERT_EQ(1u, args.size());
+
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE),
+                      WithCoords(POINTER_X - 5, POINTER_Y + 10), WithRelativeMotion(-5, 10),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER), WithButtonState(0),
+                      WithPressure(0.0f)));
+
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(95, 210));
+}
+
+TEST_F(GestureConverterTest, ButtonsChange) {
+    GestureConverter converter(*mReader->getContext(), DEVICE_ID);
+
+    // Press left and right buttons at once
+    Gesture downGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
+                        /* down= */ GESTURES_BUTTON_LEFT | GESTURES_BUTTON_RIGHT,
+                        /* up= */ GESTURES_BUTTON_NONE, /* is_tap= */ false);
+    std::list<NotifyArgs> args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, downGesture);
+    ASSERT_EQ(3u, args.size());
+
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_DOWN),
+                      WithButtonState(AMOTION_EVENT_BUTTON_PRIMARY |
+                                      AMOTION_EVENT_BUTTON_SECONDARY),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+    args.pop_front();
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_BUTTON_PRESS),
+                      WithActionButton(AMOTION_EVENT_BUTTON_PRIMARY),
+                      WithButtonState(AMOTION_EVENT_BUTTON_PRIMARY),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+    args.pop_front();
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_BUTTON_PRESS),
+                      WithActionButton(AMOTION_EVENT_BUTTON_SECONDARY),
+                      WithButtonState(AMOTION_EVENT_BUTTON_PRIMARY |
+                                      AMOTION_EVENT_BUTTON_SECONDARY),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+
+    // Then release the left button
+    Gesture leftUpGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
+                          /* down= */ GESTURES_BUTTON_NONE, /* up= */ GESTURES_BUTTON_LEFT,
+                          /* is_tap= */ false);
+    args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, leftUpGesture);
+    ASSERT_EQ(1u, args.size());
+
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_BUTTON_RELEASE),
+                      WithActionButton(AMOTION_EVENT_BUTTON_PRIMARY),
+                      WithButtonState(AMOTION_EVENT_BUTTON_SECONDARY),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+
+    // Finally release the right button
+    Gesture rightUpGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
+                           /* down= */ GESTURES_BUTTON_NONE, /* up= */ GESTURES_BUTTON_RIGHT,
+                           /* is_tap= */ false);
+    args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, rightUpGesture);
+    ASSERT_EQ(2u, args.size());
+
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_BUTTON_RELEASE),
+                      WithActionButton(AMOTION_EVENT_BUTTON_SECONDARY), WithButtonState(0),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+    args.pop_front();
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_UP), WithButtonState(0),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+}
+
+TEST_F(GestureConverterTest, DragWithButton) {
+    GestureConverter converter(*mReader->getContext(), DEVICE_ID);
+
+    // Press the button
+    Gesture downGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
+                        /* down= */ GESTURES_BUTTON_LEFT, /* up= */ GESTURES_BUTTON_NONE,
+                        /* is_tap= */ false);
+    std::list<NotifyArgs> args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, downGesture);
+    ASSERT_EQ(2u, args.size());
+
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_DOWN),
+                      WithButtonState(AMOTION_EVENT_BUTTON_PRIMARY),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+    args.pop_front();
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_BUTTON_PRESS),
+                      WithActionButton(AMOTION_EVENT_BUTTON_PRIMARY),
+                      WithButtonState(AMOTION_EVENT_BUTTON_PRIMARY),
+                      WithCoords(POINTER_X, POINTER_Y),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+
+    // Move
+    Gesture moveGesture(kGestureMove, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, -5, 10);
+    args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, moveGesture);
+    ASSERT_EQ(1u, args.size());
+
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_MOVE),
+                      WithCoords(POINTER_X - 5, POINTER_Y + 10), WithRelativeMotion(-5, 10),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER),
+                      WithButtonState(AMOTION_EVENT_BUTTON_PRIMARY), WithPressure(1.0f)));
+
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(95, 210));
+
+    // Release the button
+    Gesture upGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
+                      /* down= */ GESTURES_BUTTON_NONE, /* up= */ GESTURES_BUTTON_LEFT,
+                      /* is_tap= */ false);
+    args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, upGesture);
+    ASSERT_EQ(2u, args.size());
+
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_BUTTON_RELEASE),
+                      WithActionButton(AMOTION_EVENT_BUTTON_PRIMARY), WithButtonState(0),
+                      WithCoords(POINTER_X - 5, POINTER_Y + 10),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+    args.pop_front();
+    ASSERT_THAT(std::get<NotifyMotionArgs>(args.front()),
+                AllOf(WithMotionAction(AMOTION_EVENT_ACTION_UP), WithButtonState(0),
+                      WithCoords(POINTER_X - 5, POINTER_Y + 10),
+                      WithToolType(AMOTION_EVENT_TOOL_TYPE_FINGER)));
+}
+
+} // namespace android
diff --git a/services/inputflinger/tests/HardwareStateConverter_test.cpp b/services/inputflinger/tests/HardwareStateConverter_test.cpp
new file mode 100644
index 0000000..7921881
--- /dev/null
+++ b/services/inputflinger/tests/HardwareStateConverter_test.cpp
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <EventHub.h>
+#include <gestures/HardwareStateConverter.h>
+#include <gtest/gtest.h>
+#include <linux/input-event-codes.h>
+
+#include "FakeEventHub.h"
+#include "FakeInputReaderPolicy.h"
+#include "InstrumentedInputReader.h"
+#include "TestConstants.h"
+#include "TestInputListener.h"
+
+namespace android {
+
+class HardwareStateConverterTest : public testing::Test {
+protected:
+    static constexpr int32_t DEVICE_ID = END_RESERVED_ID + 1000;
+    static constexpr int32_t EVENTHUB_ID = 1;
+
+    void SetUp() {
+        mFakeEventHub = std::make_unique<FakeEventHub>();
+        mFakePolicy = sp<FakeInputReaderPolicy>::make();
+        mFakeListener = std::make_unique<TestInputListener>();
+        mReader = std::make_unique<InstrumentedInputReader>(mFakeEventHub, mFakePolicy,
+                                                            *mFakeListener);
+        mDevice = newDevice();
+
+        mFakeEventHub->addAbsoluteAxis(EVENTHUB_ID, ABS_MT_SLOT, 0, 7, 0, 0, 0);
+    }
+
+    std::shared_ptr<InputDevice> newDevice() {
+        InputDeviceIdentifier identifier;
+        identifier.name = "device";
+        identifier.location = "USB1";
+        identifier.bus = 0;
+        std::shared_ptr<InputDevice> device =
+                std::make_shared<InputDevice>(mReader->getContext(), DEVICE_ID, /* generation= */ 2,
+                                              identifier);
+        mReader->pushNextDevice(device);
+        mFakeEventHub->addDevice(EVENTHUB_ID, identifier.name, InputDeviceClass::TOUCHPAD,
+                                 identifier.bus);
+        mReader->loopOnce();
+        return device;
+    }
+
+    void processAxis(HardwareStateConverter& conv, nsecs_t when, int32_t type, int32_t code,
+                     int32_t value) {
+        RawEvent event;
+        event.when = when;
+        event.readTime = READ_TIME;
+        event.deviceId = EVENTHUB_ID;
+        event.type = type;
+        event.code = code;
+        event.value = value;
+        std::optional<SelfContainedHardwareState> schs = conv.processRawEvent(&event);
+        EXPECT_FALSE(schs.has_value());
+    }
+
+    std::optional<SelfContainedHardwareState> processSync(HardwareStateConverter& conv,
+                                                          nsecs_t when) {
+        RawEvent event;
+        event.when = when;
+        event.readTime = READ_TIME;
+        event.deviceId = EVENTHUB_ID;
+        event.type = EV_SYN;
+        event.code = SYN_REPORT;
+        event.value = 0;
+        return conv.processRawEvent(&event);
+    }
+
+    std::shared_ptr<FakeEventHub> mFakeEventHub;
+    sp<FakeInputReaderPolicy> mFakePolicy;
+    std::unique_ptr<TestInputListener> mFakeListener;
+    std::unique_ptr<InstrumentedInputReader> mReader;
+    std::shared_ptr<InputDevice> mDevice;
+};
+
+TEST_F(HardwareStateConverterTest, OneFinger) {
+    const nsecs_t time = 1500000000;
+    InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
+    HardwareStateConverter conv(deviceContext);
+
+    processAxis(conv, time, EV_ABS, ABS_MT_SLOT, 0);
+    processAxis(conv, time, EV_ABS, ABS_MT_TRACKING_ID, 123);
+    processAxis(conv, time, EV_ABS, ABS_MT_POSITION_X, 50);
+    processAxis(conv, time, EV_ABS, ABS_MT_POSITION_Y, 100);
+    processAxis(conv, time, EV_ABS, ABS_MT_TOUCH_MAJOR, 5);
+    processAxis(conv, time, EV_ABS, ABS_MT_TOUCH_MINOR, 4);
+    processAxis(conv, time, EV_ABS, ABS_MT_PRESSURE, 42);
+    processAxis(conv, time, EV_ABS, ABS_MT_ORIENTATION, 2);
+
+    processAxis(conv, time, EV_ABS, ABS_X, 50);
+    processAxis(conv, time, EV_ABS, ABS_Y, 100);
+    processAxis(conv, time, EV_ABS, ABS_PRESSURE, 42);
+
+    processAxis(conv, time, EV_KEY, BTN_TOUCH, 1);
+    processAxis(conv, time, EV_KEY, BTN_TOOL_FINGER, 1);
+    std::optional<SelfContainedHardwareState> schs = processSync(conv, time);
+
+    ASSERT_TRUE(schs.has_value());
+    const HardwareState& state = schs->state;
+    EXPECT_NEAR(1.5, state.timestamp, EPSILON);
+    EXPECT_EQ(0, state.buttons_down);
+    EXPECT_EQ(1, state.touch_cnt);
+
+    ASSERT_EQ(1, state.finger_cnt);
+    const FingerState& finger = state.fingers[0];
+    EXPECT_EQ(123, finger.tracking_id);
+    EXPECT_NEAR(50, finger.position_x, EPSILON);
+    EXPECT_NEAR(100, finger.position_y, EPSILON);
+    EXPECT_NEAR(5, finger.touch_major, EPSILON);
+    EXPECT_NEAR(4, finger.touch_minor, EPSILON);
+    EXPECT_NEAR(42, finger.pressure, EPSILON);
+    EXPECT_NEAR(2, finger.orientation, EPSILON);
+    EXPECT_EQ(0u, finger.flags);
+
+    EXPECT_EQ(0, state.rel_x);
+    EXPECT_EQ(0, state.rel_y);
+    EXPECT_EQ(0, state.rel_wheel);
+    EXPECT_EQ(0, state.rel_wheel_hi_res);
+    EXPECT_EQ(0, state.rel_hwheel);
+    EXPECT_NEAR(0.0, state.msc_timestamp, EPSILON);
+}
+
+TEST_F(HardwareStateConverterTest, TwoFingers) {
+    const nsecs_t time = ARBITRARY_TIME;
+    InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
+    HardwareStateConverter conv(deviceContext);
+
+    processAxis(conv, time, EV_ABS, ABS_MT_SLOT, 0);
+    processAxis(conv, time, EV_ABS, ABS_MT_TRACKING_ID, 123);
+    processAxis(conv, time, EV_ABS, ABS_MT_POSITION_X, 50);
+    processAxis(conv, time, EV_ABS, ABS_MT_POSITION_Y, 100);
+    processAxis(conv, time, EV_ABS, ABS_MT_TOUCH_MAJOR, 5);
+    processAxis(conv, time, EV_ABS, ABS_MT_TOUCH_MINOR, 4);
+    processAxis(conv, time, EV_ABS, ABS_MT_PRESSURE, 42);
+    processAxis(conv, time, EV_ABS, ABS_MT_ORIENTATION, 2);
+
+    processAxis(conv, time, EV_ABS, ABS_MT_SLOT, 1);
+    processAxis(conv, time, EV_ABS, ABS_MT_TRACKING_ID, 456);
+    processAxis(conv, time, EV_ABS, ABS_MT_POSITION_X, -20);
+    processAxis(conv, time, EV_ABS, ABS_MT_POSITION_Y, 40);
+    processAxis(conv, time, EV_ABS, ABS_MT_TOUCH_MAJOR, 8);
+    processAxis(conv, time, EV_ABS, ABS_MT_TOUCH_MINOR, 7);
+    processAxis(conv, time, EV_ABS, ABS_MT_PRESSURE, 21);
+    processAxis(conv, time, EV_ABS, ABS_MT_ORIENTATION, 1);
+
+    processAxis(conv, time, EV_ABS, ABS_X, 50);
+    processAxis(conv, time, EV_ABS, ABS_Y, 100);
+    processAxis(conv, time, EV_ABS, ABS_PRESSURE, 42);
+
+    processAxis(conv, time, EV_KEY, BTN_TOUCH, 1);
+    processAxis(conv, time, EV_KEY, BTN_TOOL_DOUBLETAP, 1);
+    std::optional<SelfContainedHardwareState> schs = processSync(conv, time);
+
+    ASSERT_TRUE(schs.has_value());
+    ASSERT_EQ(2, schs->state.finger_cnt);
+    const FingerState& finger1 = schs->state.fingers[0];
+    EXPECT_EQ(123, finger1.tracking_id);
+    EXPECT_NEAR(50, finger1.position_x, EPSILON);
+    EXPECT_NEAR(100, finger1.position_y, EPSILON);
+    EXPECT_NEAR(5, finger1.touch_major, EPSILON);
+    EXPECT_NEAR(4, finger1.touch_minor, EPSILON);
+    EXPECT_NEAR(42, finger1.pressure, EPSILON);
+    EXPECT_NEAR(2, finger1.orientation, EPSILON);
+    EXPECT_EQ(0u, finger1.flags);
+
+    const FingerState& finger2 = schs->state.fingers[1];
+    EXPECT_EQ(456, finger2.tracking_id);
+    EXPECT_NEAR(-20, finger2.position_x, EPSILON);
+    EXPECT_NEAR(40, finger2.position_y, EPSILON);
+    EXPECT_NEAR(8, finger2.touch_major, EPSILON);
+    EXPECT_NEAR(7, finger2.touch_minor, EPSILON);
+    EXPECT_NEAR(21, finger2.pressure, EPSILON);
+    EXPECT_NEAR(1, finger2.orientation, EPSILON);
+    EXPECT_EQ(0u, finger2.flags);
+}
+
+TEST_F(HardwareStateConverterTest, ButtonPressed) {
+    const nsecs_t time = ARBITRARY_TIME;
+    InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
+    HardwareStateConverter conv(deviceContext);
+
+    processAxis(conv, time, EV_KEY, BTN_LEFT, 1);
+    std::optional<SelfContainedHardwareState> schs = processSync(conv, time);
+
+    ASSERT_TRUE(schs.has_value());
+    EXPECT_EQ(GESTURES_BUTTON_LEFT, schs->state.buttons_down);
+}
+
+TEST_F(HardwareStateConverterTest, MscTimestamp) {
+    const nsecs_t time = ARBITRARY_TIME;
+    mFakeEventHub->setMscEvent(EVENTHUB_ID, MSC_TIMESTAMP);
+    InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
+    HardwareStateConverter conv(deviceContext);
+
+    processAxis(conv, time, EV_MSC, MSC_TIMESTAMP, 1200000);
+    std::optional<SelfContainedHardwareState> schs = processSync(conv, time);
+
+    ASSERT_TRUE(schs.has_value());
+    EXPECT_NEAR(1.2, schs->state.msc_timestamp, EPSILON);
+}
+
+} // namespace android
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 41c174a..864aaea 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -29,6 +29,7 @@
 #include <sys/epoll.h>
 
 #include <cinttypes>
+#include <compare>
 #include <thread>
 #include <unordered_set>
 #include <vector>
@@ -56,12 +57,15 @@
 static constexpr int32_t DISPLAY_ID = ADISPLAY_ID_DEFAULT;
 static constexpr int32_t SECOND_DISPLAY_ID = 1;
 
+static constexpr int32_t ACTION_OUTSIDE = AMOTION_EVENT_ACTION_OUTSIDE;
 static constexpr int32_t POINTER_1_DOWN =
         AMOTION_EVENT_ACTION_POINTER_DOWN | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
 static constexpr int32_t POINTER_2_DOWN =
         AMOTION_EVENT_ACTION_POINTER_DOWN | (2 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
 static constexpr int32_t POINTER_3_DOWN =
         AMOTION_EVENT_ACTION_POINTER_DOWN | (3 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
+static constexpr int32_t POINTER_0_UP =
+        AMOTION_EVENT_ACTION_POINTER_UP | (0 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
 static constexpr int32_t POINTER_1_UP =
         AMOTION_EVENT_ACTION_POINTER_UP | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
 
@@ -81,9 +85,13 @@
 
 static constexpr std::chrono::duration STALE_EVENT_TIMEOUT = 1000ms;
 
+static constexpr int expectedWallpaperFlags =
+        AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED | AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
+
 struct PointF {
     float x;
     float y;
+    auto operator<=>(const PointF&) const = default;
 };
 
 /**
@@ -137,6 +145,24 @@
     return arg.getSource() == source;
 }
 
+MATCHER_P2(WithCoords, x, y, "MotionEvent with specified coordinates") {
+    if (arg.getPointerCount() != 1) {
+        *result_listener << "Expected 1 pointer, got " << arg.getPointerCount();
+        return false;
+    }
+    return arg.getX(0 /*pointerIndex*/) == x && arg.getY(0 /*pointerIndex*/) == y;
+}
+
+MATCHER_P(WithPointers, pointers, "MotionEvent with specified pointers") {
+    // Build a map for the received pointers, by pointer id
+    std::map<int32_t /*pointerId*/, PointF> actualPointers;
+    for (size_t pointerIndex = 0; pointerIndex < arg.getPointerCount(); pointerIndex++) {
+        const int32_t pointerId = arg.getPointerId(pointerIndex);
+        actualPointers[pointerId] = {arg.getX(pointerIndex), arg.getY(pointerIndex)};
+    }
+    return pointers == actualPointers;
+}
+
 // --- FakeInputDispatcherPolicy ---
 
 class FakeInputDispatcherPolicy : public InputDispatcherPolicyInterface {
@@ -1717,8 +1743,6 @@
     sp<FakeWindowHandle> wallpaperWindow =
             sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper", ADISPLAY_ID_DEFAULT);
     wallpaperWindow->setIsWallpaper(true);
-    constexpr int expectedWallpaperFlags =
-            AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED | AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
 
     mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {foregroundWindow, wallpaperWindow}}});
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
@@ -1761,8 +1785,6 @@
     sp<FakeWindowHandle> wallpaperWindow =
             sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper", ADISPLAY_ID_DEFAULT);
     wallpaperWindow->setIsWallpaper(true);
-    constexpr int expectedWallpaperFlags =
-            AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED | AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
 
     mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {foregroundWindow, wallpaperWindow}}});
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
@@ -1792,24 +1814,27 @@
     foregroundWindow->consumeMotionCancel();
 }
 
+class ShouldSplitTouchFixture : public InputDispatcherTest,
+                                public ::testing::WithParamInterface<bool> {};
+INSTANTIATE_TEST_SUITE_P(InputDispatcherTest, ShouldSplitTouchFixture,
+                         ::testing::Values(true, false));
 /**
  * A single window that receives touch (on top), and a wallpaper window underneath it.
  * The top window gets a multitouch gesture.
  * Ensure that wallpaper gets the same gesture.
  */
-TEST_F(InputDispatcherTest, WallpaperWindow_ReceivesMultiTouch) {
+TEST_P(ShouldSplitTouchFixture, WallpaperWindowReceivesMultiTouch) {
     std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
-    sp<FakeWindowHandle> window =
-            sp<FakeWindowHandle>::make(application, mDispatcher, "Top", ADISPLAY_ID_DEFAULT);
-    window->setDupTouchToWallpaper(true);
+    sp<FakeWindowHandle> foregroundWindow =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Foreground", ADISPLAY_ID_DEFAULT);
+    foregroundWindow->setDupTouchToWallpaper(true);
+    foregroundWindow->setPreventSplitting(GetParam());
 
     sp<FakeWindowHandle> wallpaperWindow =
             sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper", ADISPLAY_ID_DEFAULT);
     wallpaperWindow->setIsWallpaper(true);
-    constexpr int expectedWallpaperFlags =
-            AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED | AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
 
-    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {window, wallpaperWindow}}});
+    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {foregroundWindow, wallpaperWindow}}});
 
     // Touch down on top window
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
@@ -1818,7 +1843,7 @@
             << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
 
     // Both top window and its wallpaper should receive the touch down
-    window->consumeMotionDown();
+    foregroundWindow->consumeMotionDown();
     wallpaperWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
 
     // Second finger down on the top window
@@ -1837,11 +1862,34 @@
                                 InputEventInjectionSync::WAIT_FOR_RESULT))
             << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
 
-    window->consumeMotionPointerDown(1 /* pointerIndex */);
+    foregroundWindow->consumeMotionPointerDown(1 /* pointerIndex */);
     wallpaperWindow->consumeMotionPointerDown(1 /* pointerIndex */, ADISPLAY_ID_DEFAULT,
                                               expectedWallpaperFlags);
-    window->assertNoEvents();
-    wallpaperWindow->assertNoEvents();
+
+    const MotionEvent secondFingerUpEvent =
+            MotionEventBuilder(POINTER_0_UP, AINPUT_SOURCE_TOUCHSCREEN)
+                    .displayId(ADISPLAY_ID_DEFAULT)
+                    .eventTime(systemTime(SYSTEM_TIME_MONOTONIC))
+                    .pointer(PointerBuilder(/* id */ 0, AMOTION_EVENT_TOOL_TYPE_FINGER)
+                                     .x(100)
+                                     .y(100))
+                    .pointer(PointerBuilder(/* id */ 1, AMOTION_EVENT_TOOL_TYPE_FINGER)
+                                     .x(150)
+                                     .y(150))
+                    .build();
+    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+              injectMotionEvent(mDispatcher, secondFingerUpEvent, INJECT_EVENT_TIMEOUT,
+                                InputEventInjectionSync::WAIT_FOR_RESULT))
+            << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+    foregroundWindow->consumeMotionPointerUp(0);
+    wallpaperWindow->consumeMotionPointerUp(0, ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
+
+    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
+              injectMotionUp(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+                             {100, 100}))
+            << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
+    foregroundWindow->consumeMotionUp(ADISPLAY_ID_DEFAULT);
+    wallpaperWindow->consumeMotionUp(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
 }
 
 /**
@@ -1868,8 +1916,6 @@
             sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper", ADISPLAY_ID_DEFAULT);
     wallpaperWindow->setFrame(Rect(0, 0, 400, 200));
     wallpaperWindow->setIsWallpaper(true);
-    constexpr int expectedWallpaperFlags =
-            AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED | AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
 
     mDispatcher->setInputWindows(
             {{ADISPLAY_ID_DEFAULT, {leftWindow, rightWindow, wallpaperWindow}}});
@@ -1934,62 +1980,49 @@
     wallpaperWindow->assertNoEvents();
 }
 
-TEST_F(InputDispatcherTest, WallpaperWindowReceivesMultiTouch) {
+/**
+ * Two windows: a window on the left with dup touch to wallpaper and window on the right without it.
+ * The touch slips to the right window. so left window and wallpaper should receive ACTION_CANCEL
+ * The right window should receive ACTION_DOWN.
+ */
+TEST_F(InputDispatcherTest, WallpaperWindowWhenSlippery) {
     std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
-    sp<FakeWindowHandle> window =
-            sp<FakeWindowHandle>::make(application, mDispatcher, "Top", ADISPLAY_ID_DEFAULT);
-    window->setDupTouchToWallpaper(true);
+    sp<FakeWindowHandle> leftWindow =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Left", ADISPLAY_ID_DEFAULT);
+    leftWindow->setFrame(Rect(0, 0, 200, 200));
+    leftWindow->setDupTouchToWallpaper(true);
+    leftWindow->setSlippery(true);
+
+    sp<FakeWindowHandle> rightWindow =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Right", ADISPLAY_ID_DEFAULT);
+    rightWindow->setFrame(Rect(200, 0, 400, 200));
 
     sp<FakeWindowHandle> wallpaperWindow =
             sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper", ADISPLAY_ID_DEFAULT);
     wallpaperWindow->setIsWallpaper(true);
-    constexpr int expectedWallpaperFlags =
-            AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED | AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
-    wallpaperWindow->setPreventSplitting(true);
 
-    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {window, wallpaperWindow}}});
+    mDispatcher->setInputWindows(
+            {{ADISPLAY_ID_DEFAULT, {leftWindow, rightWindow, wallpaperWindow}}});
 
+    // Touch down on left window
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
               injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
-                               {50, 50}))
+                               {100, 100}))
             << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
-    window->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+
+    // Both foreground window and its wallpaper should receive the touch down
+    leftWindow->consumeMotionDown();
     wallpaperWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
 
-    const MotionEvent secondFingerDownEvent =
-            MotionEventBuilder(POINTER_1_DOWN, AINPUT_SOURCE_TOUCHSCREEN)
-                    .displayId(ADISPLAY_ID_DEFAULT)
-                    .eventTime(systemTime(SYSTEM_TIME_MONOTONIC))
-                    .pointer(PointerBuilder(/* id */ 0, AMOTION_EVENT_TOOL_TYPE_FINGER).x(50).y(50))
-                    .pointer(PointerBuilder(/* id */ 1, AMOTION_EVENT_TOOL_TYPE_FINGER).x(10).y(10))
-                    .build();
+    // Move to right window, the left window should receive cancel.
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
-              injectMotionEvent(mDispatcher, secondFingerDownEvent, INJECT_EVENT_TIMEOUT,
-                                InputEventInjectionSync::WAIT_FOR_RESULT))
+              injectMotionEvent(mDispatcher, AMOTION_EVENT_ACTION_MOVE, AINPUT_SOURCE_TOUCHSCREEN,
+                                ADISPLAY_ID_DEFAULT, {201, 100}))
             << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
 
-    window->consumeMotionPointerDown(1);
-    wallpaperWindow->consumeMotionPointerDown(1, ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
-
-    const MotionEvent secondFingerUpEvent =
-            MotionEventBuilder(POINTER_1_UP, AINPUT_SOURCE_TOUCHSCREEN)
-                    .displayId(ADISPLAY_ID_DEFAULT)
-                    .eventTime(systemTime(SYSTEM_TIME_MONOTONIC))
-                    .pointer(PointerBuilder(/* id */ 0, AMOTION_EVENT_TOOL_TYPE_FINGER).x(50).y(50))
-                    .pointer(PointerBuilder(/* id */ 1, AMOTION_EVENT_TOOL_TYPE_FINGER).x(10).y(10))
-                    .build();
-    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
-              injectMotionEvent(mDispatcher, secondFingerUpEvent, INJECT_EVENT_TIMEOUT,
-                                InputEventInjectionSync::WAIT_FOR_RESULT))
-            << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
-    window->consumeMotionPointerUp(1);
-    wallpaperWindow->consumeMotionPointerUp(1, ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
-
-    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
-              injectMotionUp(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT, {50, 50}))
-            << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
-    window->consumeMotionUp(ADISPLAY_ID_DEFAULT);
-    wallpaperWindow->consumeMotionUp(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
+    leftWindow->consumeMotionCancel();
+    rightWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+    wallpaperWindow->consumeMotionCancel(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
 }
 
 /**
@@ -2536,6 +2569,39 @@
 }
 
 /**
+ * Two windows. First is a regular window. Second does not overlap with the first, and has
+ * WATCH_OUTSIDE_TOUCH.
+ * Both windows are owned by the same UID.
+ * Tap first window. Make sure that the second window receives ACTION_OUTSIDE with correct, non-zero
+ * coordinates. The coordinates are not zeroed out because both windows are owned by the same UID.
+ */
+TEST_F(InputDispatcherTest, ActionOutsideForOwnedWindowHasValidCoordinates) {
+    std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
+    sp<FakeWindowHandle> window = sp<FakeWindowHandle>::make(application, mDispatcher,
+                                                             "First Window", ADISPLAY_ID_DEFAULT);
+    window->setFrame(Rect{0, 0, 100, 100});
+
+    sp<FakeWindowHandle> outsideWindow =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Second Window",
+                                       ADISPLAY_ID_DEFAULT);
+    outsideWindow->setFrame(Rect{100, 100, 200, 200});
+    outsideWindow->setWatchOutsideTouch(true);
+    // outsideWindow must be above 'window' to receive ACTION_OUTSIDE events when 'window' is tapped
+    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {outsideWindow, window}}});
+
+    // Tap on first window.
+    NotifyMotionArgs motionArgs =
+            generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+                               ADISPLAY_ID_DEFAULT, {PointF{50, 50}});
+    mDispatcher->notifyMotion(&motionArgs);
+    window->consumeMotionDown();
+    // The coordinates of the tap in 'outsideWindow' are relative to its top left corner.
+    // Therefore, we should offset them by (100, 100) relative to the screen's top left corner.
+    outsideWindow->consumeMotionEvent(
+            AllOf(WithMotionAction(ACTION_OUTSIDE), WithCoords(-50, -50)));
+}
+
+/**
  * This test documents the behavior of WATCH_OUTSIDE_TOUCH. The window will get ACTION_OUTSIDE when
  * a another pointer causes ACTION_DOWN to be sent to another window for the first time. Only one
  * ACTION_OUTSIDE event is sent per gesture.
@@ -2570,7 +2636,9 @@
     motionArgs = generateMotionArgs(POINTER_1_DOWN, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
                                     {PointF{-10, -10}, PointF{105, 105}});
     mDispatcher->notifyMotion(&motionArgs);
-    window->consumeMotionOutside();
+    const std::map<int32_t, PointF> expectedPointers{{0, PointF{-10, -10}}, {1, PointF{105, 105}}};
+    window->consumeMotionEvent(
+            AllOf(WithMotionAction(ACTION_OUTSIDE), WithPointers(expectedPointers)));
     secondWindow->consumeMotionDown();
     thirdWindow->assertNoEvents();
 
@@ -2802,21 +2870,26 @@
     sp<FakeWindowHandle> firstWindow =
             sp<FakeWindowHandle>::make(application, mDispatcher, "First Window",
                                        ADISPLAY_ID_DEFAULT);
+    firstWindow->setDupTouchToWallpaper(true);
     sp<FakeWindowHandle> secondWindow =
             sp<FakeWindowHandle>::make(application, mDispatcher, "Second Window",
                                        ADISPLAY_ID_DEFAULT);
-
+    sp<FakeWindowHandle> wallpaper =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper", ADISPLAY_ID_DEFAULT);
+    wallpaper->setIsWallpaper(true);
     // Add the windows to the dispatcher
-    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {firstWindow, secondWindow}}});
+    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {firstWindow, secondWindow, wallpaper}}});
 
     // Send down to the first window
     NotifyMotionArgs downMotionArgs =
             generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
                                ADISPLAY_ID_DEFAULT);
     mDispatcher->notifyMotion(&downMotionArgs);
+
     // Only the first window should get the down event
     firstWindow->consumeMotionDown();
     secondWindow->assertNoEvents();
+    wallpaper->consumeMotionDown(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
 
     // Transfer touch to the second window
     TransferFunction f = GetParam();
@@ -2825,6 +2898,7 @@
     // The first window gets cancel and the second gets down
     firstWindow->consumeMotionCancel();
     secondWindow->consumeMotionDown();
+    wallpaper->consumeMotionCancel(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
 
     // Send up event to the second window
     NotifyMotionArgs upMotionArgs =
@@ -2834,6 +2908,7 @@
     // The first  window gets no events and the second gets up
     firstWindow->assertNoEvents();
     secondWindow->consumeMotionUp();
+    wallpaper->assertNoEvents();
 }
 
 /**
@@ -2957,6 +3032,65 @@
     secondWindow->consumeMotionUp();
 }
 
+TEST_P(TransferTouchFixture, TransferTouch_MultipleWallpapers) {
+    std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
+
+    // Create a couple of windows
+    sp<FakeWindowHandle> firstWindow =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "First Window",
+                                       ADISPLAY_ID_DEFAULT);
+    firstWindow->setDupTouchToWallpaper(true);
+    sp<FakeWindowHandle> secondWindow =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Second Window",
+                                       ADISPLAY_ID_DEFAULT);
+    secondWindow->setDupTouchToWallpaper(true);
+
+    sp<FakeWindowHandle> wallpaper1 =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper1", ADISPLAY_ID_DEFAULT);
+    wallpaper1->setIsWallpaper(true);
+
+    sp<FakeWindowHandle> wallpaper2 =
+            sp<FakeWindowHandle>::make(application, mDispatcher, "Wallpaper2", ADISPLAY_ID_DEFAULT);
+    wallpaper2->setIsWallpaper(true);
+    // Add the windows to the dispatcher
+    mDispatcher->setInputWindows(
+            {{ADISPLAY_ID_DEFAULT, {firstWindow, wallpaper1, secondWindow, wallpaper2}}});
+
+    // Send down to the first window
+    NotifyMotionArgs downMotionArgs =
+            generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+                               ADISPLAY_ID_DEFAULT);
+    mDispatcher->notifyMotion(&downMotionArgs);
+
+    // Only the first window should get the down event
+    firstWindow->consumeMotionDown();
+    secondWindow->assertNoEvents();
+    wallpaper1->consumeMotionDown(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
+    wallpaper2->assertNoEvents();
+
+    // Transfer touch focus to the second window
+    TransferFunction f = GetParam();
+    bool success = f(mDispatcher, firstWindow->getToken(), secondWindow->getToken());
+    ASSERT_TRUE(success);
+
+    // The first window gets cancel and the second gets down
+    firstWindow->consumeMotionCancel();
+    secondWindow->consumeMotionDown();
+    wallpaper1->consumeMotionCancel(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
+    wallpaper2->consumeMotionDown(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
+
+    // Send up event to the second window
+    NotifyMotionArgs upMotionArgs =
+            generateMotionArgs(AMOTION_EVENT_ACTION_UP, AINPUT_SOURCE_TOUCHSCREEN,
+                               ADISPLAY_ID_DEFAULT);
+    mDispatcher->notifyMotion(&upMotionArgs);
+    // The first  window gets no events and the second gets up
+    firstWindow->assertNoEvents();
+    secondWindow->consumeMotionUp();
+    wallpaper1->assertNoEvents();
+    wallpaper2->consumeMotionUp(ADISPLAY_ID_DEFAULT, expectedWallpaperFlags);
+}
+
 // For the cases of single pointer touch and two pointers non-split touch, the api's
 // 'transferTouch' and 'transferTouchFocus' are equivalent in behaviour. They only differ
 // for the case where there are multiple pointers split across several windows.
diff --git a/services/inputflinger/tests/InputMapperTest.cpp b/services/inputflinger/tests/InputMapperTest.cpp
index 3cd7c1b..a02ef05 100644
--- a/services/inputflinger/tests/InputMapperTest.cpp
+++ b/services/inputflinger/tests/InputMapperTest.cpp
@@ -166,11 +166,4 @@
     ASSERT_NEAR(distance, coords.getAxisValue(AMOTION_EVENT_AXIS_DISTANCE), EPSILON);
 }
 
-void InputMapperTest::assertPosition(const FakePointerController& controller, float x, float y) {
-    float actualX, actualY;
-    controller.getPosition(&actualX, &actualY);
-    ASSERT_NEAR(x, actualX, 1);
-    ASSERT_NEAR(y, actualY, 1);
-}
-
 } // namespace android
diff --git a/services/inputflinger/tests/InputMapperTest.h b/services/inputflinger/tests/InputMapperTest.h
index b3401c3..63ca44c 100644
--- a/services/inputflinger/tests/InputMapperTest.h
+++ b/services/inputflinger/tests/InputMapperTest.h
@@ -89,7 +89,6 @@
                                     float size, float touchMajor, float touchMinor, float toolMajor,
                                     float toolMinor, float orientation, float distance,
                                     float scaledAxisEpsilon = 1.f);
-    static void assertPosition(const FakePointerController& controller, float x, float y);
 };
 
 } // namespace android
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index eef5690..96d27b8 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -2763,7 +2763,7 @@
 class KeyboardInputMapperTest : public InputMapperTest {
 protected:
     const std::string UNIQUE_ID = "local:0";
-
+    const KeyboardLayoutInfo DEVICE_KEYBOARD_LAYOUT_INFO = KeyboardLayoutInfo("en-US", "qwerty");
     void prepareDisplay(ui::Rotation orientation);
 
     void testDPadKeyRotation(KeyboardInputMapper& mapper, int32_t originalScanCode,
@@ -2912,6 +2912,27 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 }
 
+TEST_F(KeyboardInputMapperTest, Process_KeyRemapping) {
+    mFakeEventHub->addKey(EVENTHUB_ID, KEY_A, 0, AKEYCODE_A, 0);
+    mFakeEventHub->addKey(EVENTHUB_ID, KEY_B, 0, AKEYCODE_B, 0);
+    mFakeEventHub->addKeyRemapping(EVENTHUB_ID, AKEYCODE_A, AKEYCODE_B);
+
+    KeyboardInputMapper& mapper =
+            addMapperAndConfigure<KeyboardInputMapper>(AINPUT_SOURCE_KEYBOARD,
+                                                       AINPUT_KEYBOARD_TYPE_ALPHABETIC);
+
+    // Key down by scan code.
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_A, 1);
+    NotifyKeyArgs args;
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
+    ASSERT_EQ(AKEYCODE_B, args.keyCode);
+
+    // Key up by scan code.
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_A, 0);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
+    ASSERT_EQ(AKEYCODE_B, args.keyCode);
+}
+
 /**
  * Ensure that the readTime is set to the time when the EV_KEY is received.
  */
@@ -3561,6 +3582,24 @@
     ASSERT_EQ(AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_CANCELED, args.flags);
 }
 
+TEST_F(KeyboardInputMapperTest, Configure_AssignKeyboardLayoutInfo) {
+    mDevice->addMapper<KeyboardInputMapper>(EVENTHUB_ID, AINPUT_SOURCE_KEYBOARD,
+                                            AINPUT_KEYBOARD_TYPE_ALPHABETIC);
+    std::list<NotifyArgs> unused =
+            mDevice->configure(ARBITRARY_TIME, mFakePolicy->getReaderConfiguration(), 0);
+
+    mFakePolicy->addKeyboardLayoutAssociation(DEVICE_LOCATION, DEVICE_KEYBOARD_LAYOUT_INFO);
+
+    unused += mDevice->configure(ARBITRARY_TIME, mFakePolicy->getReaderConfiguration(),
+                                 InputReaderConfiguration::CHANGE_KEYBOARD_LAYOUT_ASSOCIATION);
+
+    InputDeviceInfo deviceInfo = mDevice->getDeviceInfo();
+    ASSERT_EQ(DEVICE_KEYBOARD_LAYOUT_INFO.languageTag,
+              deviceInfo.getKeyboardLayoutInfo()->languageTag);
+    ASSERT_EQ(DEVICE_KEYBOARD_LAYOUT_INFO.layoutType,
+              deviceInfo.getKeyboardLayoutInfo()->layoutType);
+}
+
 // --- KeyboardInputMapperTest_ExternalDevice ---
 
 class KeyboardInputMapperTest_ExternalDevice : public InputMapperTest {
@@ -4323,7 +4362,7 @@
     ASSERT_EQ(AMOTION_EVENT_ACTION_HOVER_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
             110.0f, 220.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
-    ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 110.0f, 220.0f));
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(110.0f, 220.0f));
 }
 
 TEST_F(CursorInputMapperTest, Process_PointerCapture) {
@@ -4351,7 +4390,7 @@
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
             10.0f, 20.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
-    ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 100.0f, 200.0f));
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(100.0f, 200.0f));
 
     // Button press.
     process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MOUSE, 1);
@@ -4390,7 +4429,7 @@
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
             30.0f, 40.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
-    ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 100.0f, 200.0f));
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(100.0f, 200.0f));
 
     // Disable pointer capture and check that the device generation got bumped
     // and events are generated the usual way.
@@ -4410,7 +4449,7 @@
     ASSERT_EQ(AMOTION_EVENT_ACTION_HOVER_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
             110.0f, 220.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
-    ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 110.0f, 220.0f));
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(110.0f, 220.0f));
 }
 
 /**
@@ -4527,7 +4566,7 @@
             AllOf(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE),
                   WithSource(AINPUT_SOURCE_MOUSE), WithDisplayId(SECONDARY_DISPLAY_ID),
                   WithCoords(110.0f, 220.0f))));
-    ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 110.0f, 220.0f));
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(110.0f, 220.0f));
 }
 
 TEST_F(CursorInputMapperTest, ConfigureDisplayId_WithAssociatedViewport) {
@@ -4554,7 +4593,7 @@
             AllOf(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE),
                   WithSource(AINPUT_SOURCE_MOUSE), WithDisplayId(SECONDARY_DISPLAY_ID),
                   WithCoords(110.0f, 220.0f))));
-    ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 110.0f, 220.0f));
+    ASSERT_NO_FATAL_FAILURE(mFakePointerController->assertPosition(110.0f, 220.0f));
 }
 
 TEST_F(CursorInputMapperTest, ConfigureDisplayId_IgnoresEventsForMismatchedPointerDisplay) {
@@ -5514,7 +5553,7 @@
     // Rotation 90.
     clearViewports();
     prepareDisplay(ui::ROTATION_90);
-    processDown(mapper, toRawX(75), RAW_Y_MAX - toRawY(50) + RAW_Y_MIN);
+    processDown(mapper, toRotatedRawX(75), RAW_Y_MAX - toRotatedRawY(50) + RAW_Y_MIN);
     processSync(mapper);
 
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
@@ -5542,7 +5581,7 @@
     // Rotation 270.
     clearViewports();
     prepareDisplay(ui::ROTATION_270);
-    processDown(mapper, RAW_X_MAX - toRawX(75) + RAW_X_MIN, toRawY(50));
+    processDown(mapper, RAW_X_MAX - toRotatedRawX(75) + RAW_X_MIN, toRotatedRawY(50));
     processSync(mapper);
 
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
@@ -5679,7 +5718,7 @@
     // Orientation 90, Rotation 90.
     clearViewports();
     prepareDisplay(ui::ROTATION_90);
-    processDown(mapper, toRotatedRawX(50), toRotatedRawY(75));
+    processDown(mapper, toRawX(50), toRawY(75));
     processSync(mapper);
 
     EXPECT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
@@ -5707,8 +5746,7 @@
     // Orientation 90, Rotation 270.
     clearViewports();
     prepareDisplay(ui::ROTATION_270);
-    processDown(mapper, RAW_X_MAX - toRotatedRawX(50) + RAW_X_MIN,
-                RAW_Y_MAX - toRotatedRawY(75) + RAW_Y_MIN);
+    processDown(mapper, RAW_X_MAX - toRawX(50) + RAW_X_MIN, RAW_Y_MAX - toRawY(75) + RAW_Y_MIN);
     processSync(mapper);
 
     EXPECT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
@@ -5720,6 +5758,61 @@
     EXPECT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled());
 }
 
+TEST_F(SingleTouchInputMapperTest, Process_IgnoresTouchesOutsidePhysicalFrame) {
+    addConfigurationProperty("touch.deviceType", "touchScreen");
+    prepareButtons();
+    prepareAxes(POSITION);
+    addConfigurationProperty("touch.orientationAware", "1");
+    prepareDisplay(ui::ROTATION_0);
+    auto& mapper = addMapperAndConfigure<SingleTouchInputMapper>();
+
+    // Set a physical frame in the display viewport.
+    auto viewport = mFakePolicy->getDisplayViewportByType(ViewportType::INTERNAL);
+    viewport->physicalLeft = 20;
+    viewport->physicalTop = 600;
+    viewport->physicalRight = 30;
+    viewport->physicalBottom = 610;
+    mFakePolicy->updateViewport(*viewport);
+    configureDevice(InputReaderConfiguration::CHANGE_DISPLAY_INFO);
+
+    // Start the touch.
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_TOUCH, 1);
+    processSync(mapper);
+
+    // Expect all input starting outside the physical frame to be ignored.
+    const std::array<Point, 6> outsidePoints = {
+            {{0, 0}, {19, 605}, {31, 605}, {25, 599}, {25, 611}, {DISPLAY_WIDTH, DISPLAY_HEIGHT}}};
+    for (const auto& p : outsidePoints) {
+        processMove(mapper, toRawX(p.x), toRawY(p.y));
+        processSync(mapper);
+        EXPECT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasNotCalled());
+    }
+
+    // Move the touch into the physical frame.
+    processMove(mapper, toRawX(25), toRawY(605));
+    processSync(mapper);
+    NotifyMotionArgs args;
+    EXPECT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
+    EXPECT_EQ(AMOTION_EVENT_ACTION_DOWN, args.action);
+    EXPECT_NEAR(25, args.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_X), 1);
+    EXPECT_NEAR(605, args.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_Y), 1);
+
+    // Once the touch down is reported, continue reporting input, even if it is outside the frame.
+    for (const auto& p : outsidePoints) {
+        processMove(mapper, toRawX(p.x), toRawY(p.y));
+        processSync(mapper);
+        EXPECT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
+        EXPECT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
+        EXPECT_NEAR(p.x, args.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_X), 1);
+        EXPECT_NEAR(p.y, args.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_Y), 1);
+    }
+
+    processUp(mapper);
+    processSync(mapper);
+    EXPECT_NO_FATAL_FAILURE(
+            mFakeListener->assertNotifyMotionWasCalled(WithMotionAction(AMOTION_EVENT_ACTION_UP)));
+}
+
 TEST_F(SingleTouchInputMapperTest, Process_AllAxes_DefaultCalibration) {
     addConfigurationProperty("touch.deviceType", "touchScreen");
     prepareDisplay(ui::ROTATION_0);
@@ -6484,6 +6577,17 @@
                   WithCoords(toDisplayX(100), toDisplayY(200)), WithButtonState(0))));
 }
 
+TEST_F(SingleTouchInputMapperTest, WhenDeviceTypeIsSetToTouchNavigation_setsCorrectType) {
+    mFakePolicy->addDeviceTypeAssociation(DEVICE_LOCATION, "touchNavigation");
+    prepareDisplay(ui::ROTATION_0);
+    prepareButtons();
+    prepareAxes(POSITION);
+    SingleTouchInputMapper& mapper = addMapperAndConfigure<SingleTouchInputMapper>();
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled());
+
+    ASSERT_EQ(AINPUT_SOURCE_TOUCH_NAVIGATION, mapper.getSources());
+}
+
 // --- TouchDisplayProjectionTest ---
 
 class TouchDisplayProjectionTest : public SingleTouchInputMapperTest {
diff --git a/services/inputflinger/tests/TestInputListenerMatchers.h b/services/inputflinger/tests/TestInputListenerMatchers.h
index 9db3422..e5a4b14 100644
--- a/services/inputflinger/tests/TestInputListenerMatchers.h
+++ b/services/inputflinger/tests/TestInputListenerMatchers.h
@@ -74,6 +74,14 @@
     return argX == x && argY == y;
 }
 
+MATCHER_P2(WithRelativeMotion, x, y, "InputEvent with specified relative motion") {
+    const auto argX = arg.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X);
+    const auto argY = arg.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y);
+    *result_listener << "expected relative motion (" << x << ", " << y << "), but got (" << argX
+                     << ", " << argY << ")";
+    return argX == x && argY == y;
+}
+
 MATCHER_P(WithPressure, pressure, "InputEvent with specified pressure") {
     const auto argPressure = arg.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_PRESSURE);
     *result_listener << "expected pressure " << pressure << ", but got " << argPressure;
@@ -97,6 +105,12 @@
     return arg.buttonState == buttons;
 }
 
+MATCHER_P(WithActionButton, actionButton, "InputEvent with specified action button") {
+    *result_listener << "expected action button " << actionButton << ", but got "
+                     << arg.actionButton;
+    return arg.actionButton == actionButton;
+}
+
 MATCHER_P(WithEventTime, eventTime, "InputEvent with specified eventTime") {
     *result_listener << "expected event time " << eventTime << ", but got " << arg.eventTime;
     return arg.eventTime == eventTime;
diff --git a/services/inputflinger/tests/fuzzers/CursorInputFuzzer.cpp b/services/inputflinger/tests/fuzzers/CursorInputFuzzer.cpp
index cc523e1..be85026 100644
--- a/services/inputflinger/tests/fuzzers/CursorInputFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/CursorInputFuzzer.cpp
@@ -16,11 +16,10 @@
 
 #include <CursorInputMapper.h>
 #include <FuzzContainer.h>
-#include <fuzzer/FuzzedDataProvider.h>
 
 namespace android {
 
-static void addProperty(FuzzContainer& fuzzer, std::shared_ptr<FuzzedDataProvider> fdp) {
+static void addProperty(FuzzContainer& fuzzer, std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp) {
     // Pick a random property to set for the mapper to have set.
     fdp->PickValueInArray<std::function<void()>>(
             {[&]() -> void { fuzzer.addProperty("cursor.mode", "pointer"); },
@@ -35,7 +34,8 @@
 }
 
 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size) {
-    std::shared_ptr<FuzzedDataProvider> fdp = std::make_shared<FuzzedDataProvider>(data, size);
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp =
+            std::make_shared<ThreadSafeFuzzedDataProvider>(data, size);
     FuzzContainer fuzzer(fdp);
 
     CursorInputMapper& mapper = fuzzer.getMapper<CursorInputMapper>();
diff --git a/services/inputflinger/tests/fuzzers/FuzzContainer.h b/services/inputflinger/tests/fuzzers/FuzzContainer.h
index 1e0764f..76d2bcd 100644
--- a/services/inputflinger/tests/fuzzers/FuzzContainer.h
+++ b/services/inputflinger/tests/fuzzers/FuzzContainer.h
@@ -20,7 +20,6 @@
 #include <InputMapper.h>
 #include <InputReader.h>
 #include <MapperHelpers.h>
-#include <fuzzer/FuzzedDataProvider.h>
 
 namespace android {
 
@@ -31,10 +30,10 @@
     std::unique_ptr<FuzzInputReaderContext> mFuzzContext;
     std::unique_ptr<InputDevice> mFuzzDevice;
     InputReaderConfiguration mPolicyConfig;
-    std::shared_ptr<FuzzedDataProvider> mFdp;
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp;
 
 public:
-    FuzzContainer(std::shared_ptr<FuzzedDataProvider> fdp) : mFdp(fdp) {
+    FuzzContainer(std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp) : mFdp(fdp) {
         // Setup parameters.
         std::string deviceName = mFdp->ConsumeRandomLengthString(16);
         std::string deviceLocation = mFdp->ConsumeRandomLengthString(12);
diff --git a/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp b/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
index 2eed997..a80839c 100644
--- a/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
@@ -153,6 +153,10 @@
         return reader->getLightPlayerId(deviceId, lightId);
     }
 
+    void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const {
+        reader->addKeyRemapping(deviceId, fromKeyCode, toKeyCode);
+    }
+
     int32_t getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const {
         return reader->getKeyCodeForKeyLocation(deviceId, locationKeyCode);
     }
@@ -166,7 +170,8 @@
 };
 
 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size) {
-    std::shared_ptr<FuzzedDataProvider> fdp = std::make_shared<FuzzedDataProvider>(data, size);
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp =
+            std::make_shared<ThreadSafeFuzzedDataProvider>(data, size);
 
     FuzzInputListener fuzzListener;
     sp<FuzzInputReaderPolicy> fuzzPolicy = sp<FuzzInputReaderPolicy>::make(fdp);
diff --git a/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp b/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp
index e880f55..8e2d677 100644
--- a/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp
@@ -16,13 +16,12 @@
 
 #include <FuzzContainer.h>
 #include <KeyboardInputMapper.h>
-#include <fuzzer/FuzzedDataProvider.h>
 
 namespace android {
 
 const int32_t kMaxKeycodes = 100;
 
-static void addProperty(FuzzContainer& fuzzer, std::shared_ptr<FuzzedDataProvider> fdp) {
+static void addProperty(FuzzContainer& fuzzer, std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp) {
     // Pick a random property to set for the mapper to have set.
     fdp->PickValueInArray<std::function<void()>>(
             {[&]() -> void { fuzzer.addProperty("keyboard.orientationAware", "1"); },
@@ -41,7 +40,8 @@
 }
 
 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size) {
-    std::shared_ptr<FuzzedDataProvider> fdp = std::make_shared<FuzzedDataProvider>(data, size);
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp =
+            std::make_shared<ThreadSafeFuzzedDataProvider>(data, size);
     FuzzContainer fuzzer(fdp);
 
     KeyboardInputMapper& mapper =
diff --git a/services/inputflinger/tests/fuzzers/MapperHelpers.h b/services/inputflinger/tests/fuzzers/MapperHelpers.h
index 445ed18..a0910ea 100644
--- a/services/inputflinger/tests/fuzzers/MapperHelpers.h
+++ b/services/inputflinger/tests/fuzzers/MapperHelpers.h
@@ -13,13 +13,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 #pragma once
 
 #include <InputDevice.h>
 #include <InputMapper.h>
 #include <InputReader.h>
-#include <fuzzer/FuzzedDataProvider.h>
+#include <ThreadSafeFuzzedDataProvider.h>
 #include "android/hardware/input/InputDeviceCountryCode.h"
 
 using android::hardware::input::InputDeviceCountryCode;
@@ -114,10 +113,10 @@
     InputDeviceIdentifier mIdentifier;
     std::vector<TouchVideoFrame> mVideoFrames;
     PropertyMap mFuzzConfig;
-    std::shared_ptr<FuzzedDataProvider> mFdp;
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp;
 
 public:
-    FuzzEventHub(std::shared_ptr<FuzzedDataProvider> fdp) : mFdp(std::move(fdp)) {}
+    FuzzEventHub(std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp) : mFdp(std::move(fdp)) {}
     ~FuzzEventHub() {}
     void addProperty(std::string key, std::string value) { mFuzzConfig.addProperty(key, value); }
 
@@ -211,6 +210,7 @@
     int32_t getSwitchState(int32_t deviceId, int32_t sw) const override {
         return mFdp->ConsumeIntegral<int32_t>();
     }
+    void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const override {}
     int32_t getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const override {
         return mFdp->ConsumeIntegral<int32_t>();
     }
@@ -263,10 +263,10 @@
 };
 
 class FuzzPointerController : public PointerControllerInterface {
-    std::shared_ptr<FuzzedDataProvider> mFdp;
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp;
 
 public:
-    FuzzPointerController(std::shared_ptr<FuzzedDataProvider> mFdp) : mFdp(mFdp) {}
+    FuzzPointerController(std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp) : mFdp(mFdp) {}
     ~FuzzPointerController() {}
     bool getBounds(float* outMinX, float* outMinY, float* outMaxX, float* outMaxY) const override {
         return mFdp->ConsumeBool();
@@ -289,13 +289,13 @@
 class FuzzInputReaderPolicy : public InputReaderPolicyInterface {
     TouchAffineTransformation mTransform;
     std::shared_ptr<FuzzPointerController> mPointerController;
-    std::shared_ptr<FuzzedDataProvider> mFdp;
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp;
 
 protected:
     ~FuzzInputReaderPolicy() {}
 
 public:
-    FuzzInputReaderPolicy(std::shared_ptr<FuzzedDataProvider> mFdp) : mFdp(mFdp) {
+    FuzzInputReaderPolicy(std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp) : mFdp(mFdp) {
         mPointerController = std::make_shared<FuzzPointerController>(mFdp);
     }
     void getReaderConfiguration(InputReaderConfiguration* outConfig) override {}
@@ -333,13 +333,13 @@
 class FuzzInputReaderContext : public InputReaderContext {
     std::shared_ptr<EventHubInterface> mEventHub;
     sp<InputReaderPolicyInterface> mPolicy;
-    std::shared_ptr<FuzzedDataProvider> mFdp;
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp;
 
 public:
     FuzzInputReaderContext(std::shared_ptr<EventHubInterface> eventHub,
                            const sp<InputReaderPolicyInterface>& policy,
                            InputListenerInterface& listener,
-                           std::shared_ptr<FuzzedDataProvider> mFdp)
+                           std::shared_ptr<ThreadSafeFuzzedDataProvider> mFdp)
           : mEventHub(eventHub), mPolicy(policy), mFdp(mFdp) {}
     ~FuzzInputReaderContext() {}
     void updateGlobalMetaState() override {}
diff --git a/services/inputflinger/tests/fuzzers/MultiTouchInputFuzzer.cpp b/services/inputflinger/tests/fuzzers/MultiTouchInputFuzzer.cpp
index 99fd083..011455b 100644
--- a/services/inputflinger/tests/fuzzers/MultiTouchInputFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/MultiTouchInputFuzzer.cpp
@@ -16,13 +16,12 @@
 
 #include <FuzzContainer.h>
 #include <MultiTouchInputMapper.h>
-#include <fuzzer/FuzzedDataProvider.h>
 
 namespace android {
 
 const int32_t kMaxKeycodes = 100;
 
-static void addProperty(FuzzContainer& fuzzer, std::shared_ptr<FuzzedDataProvider> fdp) {
+static void addProperty(FuzzContainer& fuzzer, std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp) {
     // Pick a random property to set for the mapper to have set.
     fdp->PickValueInArray<std::function<void()>>(
             {[&]() -> void { fuzzer.addProperty("touch.deviceType", "touchScreen"); },
@@ -58,7 +57,8 @@
 }
 
 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size) {
-    std::shared_ptr<FuzzedDataProvider> fdp = std::make_shared<FuzzedDataProvider>(data, size);
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp =
+            std::make_shared<ThreadSafeFuzzedDataProvider>(data, size);
     FuzzContainer fuzzer(fdp);
 
     MultiTouchInputMapper& mapper = fuzzer.getMapper<MultiTouchInputMapper>();
diff --git a/services/inputflinger/tests/fuzzers/SwitchInputFuzzer.cpp b/services/inputflinger/tests/fuzzers/SwitchInputFuzzer.cpp
index 7416ce9..c4938f2 100644
--- a/services/inputflinger/tests/fuzzers/SwitchInputFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/SwitchInputFuzzer.cpp
@@ -16,12 +16,12 @@
 
 #include <FuzzContainer.h>
 #include <SwitchInputMapper.h>
-#include <fuzzer/FuzzedDataProvider.h>
 
 namespace android {
 
 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size) {
-    std::shared_ptr<FuzzedDataProvider> fdp = std::make_shared<FuzzedDataProvider>(data, size);
+    std::shared_ptr<ThreadSafeFuzzedDataProvider> fdp =
+            std::make_shared<ThreadSafeFuzzedDataProvider>(data, size);
     FuzzContainer fuzzer(fdp);
 
     SwitchInputMapper& mapper = fuzzer.getMapper<SwitchInputMapper>();
diff --git a/services/inputflinger/tests/fuzzers/ThreadSafeFuzzedDataProvider.h b/services/inputflinger/tests/fuzzers/ThreadSafeFuzzedDataProvider.h
new file mode 100644
index 0000000..2f76f18
--- /dev/null
+++ b/services/inputflinger/tests/fuzzers/ThreadSafeFuzzedDataProvider.h
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <fuzzer/FuzzedDataProvider.h>
+
+/**
+ * A thread-safe interface to the FuzzedDataProvider
+ */
+class ThreadSafeFuzzedDataProvider : FuzzedDataProvider {
+private:
+    std::mutex mLock;
+
+public:
+    ThreadSafeFuzzedDataProvider(const uint8_t* data, size_t size)
+          : FuzzedDataProvider(data, size) {}
+
+    template <typename T>
+    std::vector<T> ConsumeBytes(size_t num_bytes) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeBytes<T>(num_bytes);
+    }
+
+    template <typename T>
+    std::vector<T> ConsumeBytesWithTerminator(size_t num_bytes, T terminator) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeBytesWithTerminator<T>(num_bytes, terminator);
+    }
+
+    template <typename T>
+    std::vector<T> ConsumeRemainingBytes() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeRemainingBytes<T>();
+    }
+
+    std::string ConsumeBytesAsString(size_t num_bytes) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeBytesAsString(num_bytes);
+    }
+
+    std::string ConsumeRandomLengthString(size_t max_length) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeRandomLengthString(max_length);
+    }
+
+    std::string ConsumeRandomLengthString() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeRandomLengthString();
+    }
+
+    std::string ConsumeRemainingBytesAsString() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeRemainingBytesAsString();
+    }
+
+    template <typename T>
+    T ConsumeIntegral() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeIntegral<T>();
+    }
+
+    template <typename T>
+    T ConsumeIntegralInRange(T min, T max) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeIntegralInRange<T>(min, max);
+    }
+
+    template <typename T>
+    T ConsumeFloatingPoint() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeFloatingPoint<T>();
+    }
+
+    template <typename T>
+    T ConsumeFloatingPointInRange(T min, T max) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeFloatingPointInRange<T>(min, max);
+    }
+
+    template <typename T>
+    T ConsumeProbability() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeProbability<T>();
+    }
+
+    bool ConsumeBool() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeBool();
+    }
+
+    template <typename T>
+    T ConsumeEnum() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeEnum<T>();
+    }
+
+    template <typename T, size_t size>
+    T PickValueInArray(const T (&array)[size]) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::PickValueInArray(array);
+    }
+
+    template <typename T, size_t size>
+    T PickValueInArray(const std::array<T, size>& array) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::PickValueInArray(array);
+    }
+
+    template <typename T>
+    T PickValueInArray(std::initializer_list<const T> list) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::PickValueInArray(list);
+    }
+
+    size_t ConsumeData(void* destination, size_t num_bytes) {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::ConsumeData(destination, num_bytes);
+    }
+
+    size_t remaining_bytes() {
+        std::scoped_lock _l(mLock);
+        return FuzzedDataProvider::remaining_bytes();
+    }
+};
diff --git a/services/sensorservice/Android.bp b/services/sensorservice/Android.bp
index 0eeb820..11c56a8 100644
--- a/services/sensorservice/Android.bp
+++ b/services/sensorservice/Android.bp
@@ -76,7 +76,7 @@
         "libaidlcommonsupport",
         "android.hardware.sensors@1.0-convert",
         "android.hardware.sensors-V1-convert",
-        "android.hardware.sensors-V1-ndk",
+        "android.hardware.sensors-V2-ndk",
     ],
 
     generated_headers: ["framework-cppstream-protos"],
diff --git a/services/sensorservice/SensorDirectConnection.cpp b/services/sensorservice/SensorDirectConnection.cpp
index 291c770..4ac9651 100644
--- a/services/sensorservice/SensorDirectConnection.cpp
+++ b/services/sensorservice/SensorDirectConnection.cpp
@@ -151,7 +151,7 @@
         return PERMISSION_DENIED;
     }
 
-    sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+    std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
     if (si == nullptr) {
         return NAME_NOT_FOUND;
     }
@@ -228,7 +228,7 @@
     for (auto &i : existingConnections) {
         int handle = i.first;
         int rateLevel = i.second;
-        sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+        std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
         if (si != nullptr) {
             const Sensor& s = si->getSensor();
             if (mService->isSensorInCappedSet(s.getType()) &&
diff --git a/services/sensorservice/SensorEventConnection.cpp b/services/sensorservice/SensorEventConnection.cpp
index f06f947..82d0295 100644
--- a/services/sensorservice/SensorEventConnection.cpp
+++ b/services/sensorservice/SensorEventConnection.cpp
@@ -160,7 +160,7 @@
 
 bool SensorService::SensorEventConnection::addSensor(int32_t handle) {
     Mutex::Autolock _l(mConnectionLock);
-    sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+    std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
     if (si == nullptr ||
         !mService->canAccessSensor(si->getSensor(), "Add to SensorEventConnection: ",
                                    mOpPackageName) ||
@@ -202,7 +202,7 @@
     Mutex::Autolock _l(mConnectionLock);
     for (auto &it : mSensorInfo) {
         const int handle = it.first;
-        sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+        std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
         if (si != nullptr && si->getSensor().getReportingMode() == AREPORTING_MODE_ONE_SHOT) {
             return true;
         }
@@ -245,7 +245,7 @@
     if (mDataInjectionMode) looper_flags |= ALOOPER_EVENT_INPUT;
     for (auto& it : mSensorInfo) {
         const int handle = it.first;
-        sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+        std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
         if (si != nullptr && si->getSensor().isWakeUpSensor()) {
             looper_flags |= ALOOPER_EVENT_INPUT;
         }
@@ -555,7 +555,7 @@
     // flush complete events to be sent.
     for (auto& it : mSensorInfo) {
         const int handle = it.first;
-        sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+        std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
         if (si == nullptr) {
             continue;
         }
@@ -689,7 +689,7 @@
     if (enabled) {
         nsecs_t requestedSamplingPeriodNs = samplingPeriodNs;
         bool isSensorCapped = false;
-        sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+        std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
         if (si != nullptr) {
             const Sensor& s = si->getSensor();
             if (mService->isSensorInCappedSet(s.getType())) {
@@ -729,7 +729,7 @@
 
     nsecs_t requestedSamplingPeriodNs = samplingPeriodNs;
     bool isSensorCapped = false;
-    sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
+    std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(handle);
     if (si != nullptr) {
         const Sensor& s = si->getSensor();
         if (mService->isSensorInCappedSet(s.getType())) {
@@ -852,7 +852,7 @@
                 }
                 sensors_event_t sensor_event;
                 memcpy(&sensor_event, buf, sizeof(sensors_event_t));
-                sp<SensorInterface> si =
+                std::shared_ptr<SensorInterface> si =
                         mService->getSensorInterfaceFromHandle(sensor_event.sensor);
                 if (si == nullptr) {
                     return 1;
@@ -903,7 +903,7 @@
     size_t fifoWakeUpSensors = 0;
     size_t fifoNonWakeUpSensors = 0;
     for (auto& it : mSensorInfo) {
-        sp<SensorInterface> si = mService->getSensorInterfaceFromHandle(it.first);
+        std::shared_ptr<SensorInterface> si = mService->getSensorInterfaceFromHandle(it.first);
         if (si == nullptr) {
             continue;
         }
diff --git a/services/sensorservice/SensorList.cpp b/services/sensorservice/SensorList.cpp
index 6d36b47..daff4d0 100644
--- a/services/sensorservice/SensorList.cpp
+++ b/services/sensorservice/SensorList.cpp
@@ -28,13 +28,13 @@
 
 const Sensor SensorList::mNonSensor = Sensor("unknown");
 
-bool SensorList::add(
-        int handle, SensorInterface* si, bool isForDebug, bool isVirtual, int deviceId) {
+bool SensorList::add(int handle, std::shared_ptr<SensorInterface> si, bool isForDebug,
+                     bool isVirtual, int deviceId) {
     std::lock_guard<std::mutex> lk(mLock);
     if (handle == si->getSensor().getHandle() &&
         mUsedHandle.insert(handle).second) {
         // will succeed as the mUsedHandle does not have this handle
-        mHandleMap.emplace(handle, Entry(si, isForDebug, isVirtual, deviceId));
+        mHandleMap.emplace(handle, Entry(std::move(si), isForDebug, isVirtual, deviceId));
         return true;
     }
     // handle exist already or handle mismatch
@@ -63,12 +63,12 @@
             mNonSensor.getStringType());
 }
 
-sp<SensorInterface> SensorList::getInterface(int handle) const {
-    return getOne<sp<SensorInterface>>(
-            handle, [] (const Entry& e) -> sp<SensorInterface> {return e.si;}, nullptr);
+std::shared_ptr<SensorInterface> SensorList::getInterface(int handle) const {
+    return getOne<std::shared_ptr<SensorInterface>>(
+            handle, [] (const Entry& e) -> std::shared_ptr<SensorInterface> {return e.si;},
+            nullptr);
 }
 
-
 bool SensorList::isNewHandle(int handle) const {
     std::lock_guard<std::mutex> lk(mLock);
     return mUsedHandle.find(handle) == mUsedHandle.end();
diff --git a/services/sensorservice/SensorList.h b/services/sensorservice/SensorList.h
index 79f6701..ad5b21f 100644
--- a/services/sensorservice/SensorList.h
+++ b/services/sensorservice/SensorList.h
@@ -37,22 +37,18 @@
 class SensorList : public Dumpable {
 public:
     struct Entry {
-        sp<SensorInterface> si;
+        std::shared_ptr<SensorInterface> si;
         const bool isForDebug;
         const bool isVirtual;
         const int deviceId;
-        Entry(SensorInterface* si_, bool debug_, bool virtual_, int deviceId_) :
-            si(si_), isForDebug(debug_), isVirtual(virtual_), deviceId(deviceId_) {
+        Entry(std::shared_ptr<SensorInterface> si_, bool debug_, bool virtual_, int deviceId_) :
+            si(std::move(si_)), isForDebug(debug_), isVirtual(virtual_), deviceId(deviceId_) {
         }
     };
 
-    // After SensorInterface * is added into SensorList, it can be assumed that SensorList own the
-    // object it pointed to and the object should not be released elsewhere.
-    bool add(int handle, SensorInterface* si, bool isForDebug = false, bool isVirtual = false,
-             int deviceId = RuntimeSensor::DEFAULT_DEVICE_ID);
-
-    // After a handle is removed, the object that SensorInterface * pointing to may get deleted if
-    // no more sp<> of the same object exist.
+    // SensorList owns the SensorInterface pointer.
+    bool add(int handle, std::shared_ptr<SensorInterface> si, bool isForDebug = false,
+             bool isVirtual = false, int deviceId = RuntimeSensor::DEFAULT_DEVICE_ID);
     bool remove(int handle);
 
     inline bool hasAnySensor() const { return mHandleMap.size() > 0;}
@@ -67,7 +63,7 @@
     String8 getName(int handle) const;
     String8 getStringType(int handle) const;
 
-    sp<SensorInterface> getInterface(int handle) const;
+    std::shared_ptr<SensorInterface> getInterface(int handle) const;
     bool isNewHandle(int handle) const;
 
     // Iterate through Sensor in sensor list and perform operation f on each Sensor object.
diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index 0c9fef5..6504b79 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#include <aidl/android/hardware/sensors/ISensors.h>
 #include <android-base/strings.h>
 #include <android/content/pm/IPackageManagerNative.h>
 #include <android/util/ProtoOutputStream.h>
@@ -104,12 +105,10 @@
 
 namespace {
 
-// TODO(b/259227294): Move the sensor ranges to the HAL.
 int32_t nextRuntimeSensorHandle() {
-    static constexpr int32_t kRuntimeHandleBase = 0x5F000000;
-    static constexpr int32_t kRuntimeHandleEnd = 0x5FFFFFFF;
-    static int32_t nextHandle = kRuntimeHandleBase;
-    if (nextHandle == kRuntimeHandleEnd) {
+    using ::aidl::android::hardware::sensors::ISensors;
+    static int32_t nextHandle = ISensors::RUNTIME_SENSORS_HANDLE_BASE;
+    if (nextHandle == ISensors::RUNTIME_SENSORS_HANDLE_END) {
         return -1;
     }
     return nextHandle++;
@@ -183,15 +182,14 @@
     sensor_t runtimeSensor = sensor;
     // force the handle to be consistent
     runtimeSensor.handle = handle;
-    SensorInterface *si = new RuntimeSensor(runtimeSensor, std::move(runtimeSensorCallback));
+    auto si = std::make_shared<RuntimeSensor>(runtimeSensor, std::move(runtimeSensorCallback));
 
     Mutex::Autolock _l(mLock);
-    const Sensor& s = registerSensor(si, /* isDebug= */ false, /* isVirtual= */ false, deviceId);
-
-    if (s.getHandle() != handle) {
+    if (!registerSensor(std::move(si), /* isDebug= */ false, /* isVirtual= */ false, deviceId)) {
         // The registration was unsuccessful.
-        return s.getHandle();
+        return mSensors.getNonSensor().getHandle();
     }
+
     return handle;
 }
 
@@ -319,11 +317,13 @@
                 }
                 if (useThisSensor) {
                     if (list[i].type == SENSOR_TYPE_PROXIMITY) {
-                        SensorInterface* s = new ProximitySensor(list[i], *this);
-                        registerSensor(s);
-                        mProxSensorHandles.push_back(s->getSensor().getHandle());
+                        auto s = std::make_shared<ProximitySensor>(list[i], *this);
+                        const int handle = s->getSensor().getHandle();
+                        if (registerSensor(std::move(s))) {
+                            mProxSensorHandles.push_back(handle);
+                        }
                     } else {
-                        registerSensor(new HardwareSensor(list[i]));
+                        registerSensor(std::make_shared<HardwareSensor>(list[i]));
                     }
                 }
             }
@@ -338,56 +338,63 @@
                 // available in the HAL
                 bool needRotationVector =
                         (virtualSensorsNeeds & (1<<SENSOR_TYPE_ROTATION_VECTOR)) != 0;
-
-                registerSensor(new RotationVectorSensor(), !needRotationVector, true);
-                registerSensor(new OrientationSensor(), !needRotationVector, true);
+                registerVirtualSensor(std::make_shared<RotationVectorSensor>(),
+                                      /* isDebug= */ !needRotationVector);
+                registerVirtualSensor(std::make_shared<OrientationSensor>(),
+                                      /* isDebug= */ !needRotationVector);
 
                 // virtual debugging sensors are not for user
-                registerSensor( new CorrectedGyroSensor(list, count), true, true);
-                registerSensor( new GyroDriftSensor(), true, true);
+                registerVirtualSensor(std::make_shared<CorrectedGyroSensor>(list, count),
+                                      /* isDebug= */ true);
+                registerVirtualSensor(std::make_shared<GyroDriftSensor>(), /* isDebug= */ true);
             }
 
             if (hasAccel && (hasGyro || hasGyroUncalibrated)) {
                 bool needGravitySensor = (virtualSensorsNeeds & (1<<SENSOR_TYPE_GRAVITY)) != 0;
-                registerSensor(new GravitySensor(list, count), !needGravitySensor, true);
+                registerVirtualSensor(std::make_shared<GravitySensor>(list, count),
+                                      /* isDebug= */ !needGravitySensor);
 
                 bool needLinearAcceleration =
                         (virtualSensorsNeeds & (1<<SENSOR_TYPE_LINEAR_ACCELERATION)) != 0;
-                registerSensor(new LinearAccelerationSensor(list, count),
-                               !needLinearAcceleration, true);
+                registerVirtualSensor(std::make_shared<LinearAccelerationSensor>(list, count),
+                                      /* isDebug= */ !needLinearAcceleration);
 
                 bool needGameRotationVector =
                         (virtualSensorsNeeds & (1<<SENSOR_TYPE_GAME_ROTATION_VECTOR)) != 0;
-                registerSensor(new GameRotationVectorSensor(), !needGameRotationVector, true);
+                registerVirtualSensor(std::make_shared<GameRotationVectorSensor>(),
+                                      /* isDebug= */ !needGameRotationVector);
             }
 
             if (hasAccel && hasMag) {
                 bool needGeoMagRotationVector =
                         (virtualSensorsNeeds & (1<<SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR)) != 0;
-                registerSensor(new GeoMagRotationVectorSensor(), !needGeoMagRotationVector, true);
+                registerVirtualSensor(std::make_shared<GeoMagRotationVectorSensor>(),
+                                      /* isDebug= */ !needGeoMagRotationVector);
             }
 
             if (isAutomotive()) {
                 if (hasAccel) {
-                   registerSensor(new LimitedAxesImuSensor(list, count, SENSOR_TYPE_ACCELEROMETER),
-                                  /*isDebug=*/false, /*isVirtual=*/true);
+                    registerVirtualSensor(
+                            std::make_shared<LimitedAxesImuSensor>(
+                                    list, count, SENSOR_TYPE_ACCELEROMETER));
                }
 
                if (hasGyro) {
-                   registerSensor(new LimitedAxesImuSensor(list, count, SENSOR_TYPE_GYROSCOPE),
-                                  /*isDebug=*/false, /*isVirtual=*/true);
+                    registerVirtualSensor(
+                            std::make_shared<LimitedAxesImuSensor>(
+                                    list, count, SENSOR_TYPE_GYROSCOPE));
                }
 
                if (hasAccelUncalibrated) {
-                   registerSensor(new LimitedAxesImuSensor(list, count,
-                                                           SENSOR_TYPE_ACCELEROMETER_UNCALIBRATED),
-                                  /*isDebug=*/false, /*isVirtual=*/true);
+                    registerVirtualSensor(
+                            std::make_shared<LimitedAxesImuSensor>(
+                                    list, count, SENSOR_TYPE_ACCELEROMETER_UNCALIBRATED));
                }
 
                if (hasGyroUncalibrated) {
-                   registerSensor(new LimitedAxesImuSensor(list, count,
-                                                           SENSOR_TYPE_GYROSCOPE_UNCALIBRATED),
-                                  /*isDebug=*/false, /*isVirtual=*/true);
+                    registerVirtualSensor(
+                            std::make_shared<LimitedAxesImuSensor>(
+                                    list, count, SENSOR_TYPE_GYROSCOPE_UNCALIBRATED));
                }
             }
 
@@ -488,20 +495,21 @@
         && isUidActive(uid) && !isOperationRestrictedLocked(opPackageName);
 }
 
-const Sensor& SensorService::registerSensor(SensorInterface* s, bool isDebug, bool isVirtual,
-                                            int deviceId) {
-    int handle = s->getSensor().getHandle();
-    int type = s->getSensor().getType();
-    if (mSensors.add(handle, s, isDebug, isVirtual, deviceId)) {
+bool SensorService::registerSensor(std::shared_ptr<SensorInterface> s, bool isDebug, bool isVirtual,
+                                   int deviceId) {
+    const int handle = s->getSensor().getHandle();
+    const int type = s->getSensor().getType();
+    if (mSensors.add(handle, std::move(s), isDebug, isVirtual, deviceId)) {
         mRecentEvent.emplace(handle, new SensorServiceUtil::RecentEventLogger(type));
-        return s->getSensor();
+        return true;
     } else {
-        return mSensors.getNonSensor();
+        LOG_FATAL("Failed to register sensor with handle %d", handle);
+        return false;
     }
 }
 
-const Sensor& SensorService::registerDynamicSensorLocked(SensorInterface* s, bool isDebug) {
-    return registerSensor(s, isDebug);
+bool SensorService::registerDynamicSensorLocked(std::shared_ptr<SensorInterface> s, bool isDebug) {
+    return registerSensor(std::move(s), isDebug);
 }
 
 bool SensorService::unregisterDynamicSensorLocked(int handle) {
@@ -515,8 +523,8 @@
     return ret;
 }
 
-const Sensor& SensorService::registerVirtualSensor(SensorInterface* s, bool isDebug) {
-    return registerSensor(s, isDebug, true);
+bool SensorService::registerVirtualSensor(std::shared_ptr<SensorInterface> s, bool isDebug) {
+    return registerSensor(std::move(s), isDebug, true);
 }
 
 SensorService::~SensorService() {
@@ -611,8 +619,8 @@
 
             result.append("Recent Sensor events:\n");
             for (auto&& i : mRecentEvent) {
-                sp<SensorInterface> s = mSensors.getInterface(i.first);
-                if (!i.second->isEmpty()) {
+                std::shared_ptr<SensorInterface> s = getSensorInterfaceFromHandle(i.first);
+                if (!i.second->isEmpty() && s != nullptr) {
                     if (privileged || s->getSensor().getRequiredPermission().isEmpty()) {
                         i.second->setFormat("normal");
                     } else {
@@ -729,8 +737,8 @@
     // Write SensorEventsProto
     token = proto.start(SENSOR_EVENTS);
     for (auto&& i : mRecentEvent) {
-        sp<SensorInterface> s = mSensors.getInterface(i.first);
-        if (!i.second->isEmpty()) {
+        std::shared_ptr<SensorInterface> s = getSensorInterfaceFromHandle(i.first);
+        if (!i.second->isEmpty() && s != nullptr) {
             i.second->setFormat(privileged || s->getSensor().getRequiredPermission().isEmpty() ?
                     "normal" : "mask_data");
             const uint64_t mToken = proto.start(service::SensorEventsProto::RECENT_EVENTS_LOGS);
@@ -1020,7 +1028,7 @@
             handle = buffer[i].meta_data.sensor;
         }
         if (connection->hasSensor(handle)) {
-            sp<SensorInterface> si = getSensorInterfaceFromHandle(handle);
+            std::shared_ptr<SensorInterface> si = getSensorInterfaceFromHandle(handle);
             // If this buffer has an event from a one_shot sensor and this connection is registered
             // for this particular one_shot sensor, try cleaning up the connection.
             if (si != nullptr &&
@@ -1105,7 +1113,7 @@
                             break;
                         }
                         sensors_event_t out;
-                        sp<SensorInterface> si = mSensors.getInterface(handle);
+                        std::shared_ptr<SensorInterface> si = getSensorInterfaceFromHandle(handle);
                         if (si == nullptr) {
                             ALOGE("handle %d is not an valid virtual sensor", handle);
                             continue;
@@ -1200,12 +1208,12 @@
                         // force the handle to be consistent
                         s.handle = handle;
 
-                        SensorInterface *si = new HardwareSensor(s, uuid);
+                        auto si = std::make_shared<HardwareSensor>(s, uuid);
 
                         // This will release hold on dynamic sensor meta, so it should be called
                         // after Sensor object is created.
                         device.handleDynamicSensorConnection(handle, true /*connected*/);
-                        registerDynamicSensorLocked(si);
+                        registerDynamicSensorLocked(std::move(si));
                     } else {
                         ALOGE("Handle %d has been used, cannot use again before reboot.", handle);
                     }
@@ -1332,7 +1340,7 @@
 }
 
 bool SensorService::isVirtualSensor(int handle) const {
-    sp<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
+    std::shared_ptr<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
     return sensor != nullptr && sensor->isVirtual();
 }
 
@@ -1341,7 +1349,7 @@
     if (event.type == SENSOR_TYPE_META_DATA) {
         handle = event.meta_data.sensor;
     }
-    sp<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
+    std::shared_ptr<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
     return sensor != nullptr && sensor->getSensor().isWakeUpSensor();
 }
 
@@ -1741,7 +1749,7 @@
         int handle = mActiveSensors.keyAt(i);
         if (c->hasSensor(handle)) {
             ALOGD_IF(DEBUG_CONNECTIONS, "%zu: disabling handle=0x%08x", i, handle);
-            sp<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
+            std::shared_ptr<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
             if (sensor != nullptr) {
                 sensor->activate(c, false);
             } else {
@@ -1855,7 +1863,7 @@
     return NAME_NOT_FOUND;
 }
 
-sp<SensorInterface> SensorService::getSensorInterfaceFromHandle(int handle) const {
+std::shared_ptr<SensorInterface> SensorService::getSensorInterfaceFromHandle(int handle) const {
     return mSensors.getInterface(handle);
 }
 
@@ -1865,7 +1873,7 @@
     if (mInitCheck != NO_ERROR)
         return mInitCheck;
 
-    sp<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
+    std::shared_ptr<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
     if (sensor == nullptr ||
         !canAccessSensor(sensor->getSensor(), "Tried enabling", opPackageName)) {
         return BAD_VALUE;
@@ -2011,7 +2019,7 @@
     Mutex::Autolock _l(mLock);
     status_t err = cleanupWithoutDisableLocked(connection, handle);
     if (err == NO_ERROR) {
-        sp<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
+        std::shared_ptr<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
         err = sensor != nullptr ? sensor->activate(connection.get(), false) : status_t(BAD_VALUE);
 
     }
@@ -2057,7 +2065,7 @@
     if (mInitCheck != NO_ERROR)
         return mInitCheck;
 
-    sp<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
+    std::shared_ptr<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
     if (sensor == nullptr ||
         !canAccessSensor(sensor->getSensor(), "Tried configuring", opPackageName)) {
         return BAD_VALUE;
@@ -2083,7 +2091,7 @@
     Mutex::Autolock _l(mLock);
     // Loop through all sensors for this connection and call flush on each of them.
     for (int handle : connection->getActiveSensorHandles()) {
-        sp<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
+        std::shared_ptr<SensorInterface> sensor = getSensorInterfaceFromHandle(handle);
         if (sensor == nullptr) {
             continue;
         }
diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index e490398..78df501 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -375,15 +375,14 @@
     String8 getSensorName(int handle) const;
     String8 getSensorStringType(int handle) const;
     bool isVirtualSensor(int handle) const;
-    sp<SensorInterface> getSensorInterfaceFromHandle(int handle) const;
+    std::shared_ptr<SensorInterface> getSensorInterfaceFromHandle(int handle) const;
     bool isWakeUpSensor(int type) const;
     void recordLastValueLocked(sensors_event_t const* buffer, size_t count);
     static void sortEventBuffer(sensors_event_t* buffer, size_t count);
-    const Sensor& registerSensor(SensorInterface* sensor, bool isDebug = false,
-                                 bool isVirtual = false,
-                                 int deviceId = RuntimeSensor::DEFAULT_DEVICE_ID);
-    const Sensor& registerVirtualSensor(SensorInterface* sensor, bool isDebug = false);
-    const Sensor& registerDynamicSensorLocked(SensorInterface* sensor, bool isDebug = false);
+    bool registerSensor(std::shared_ptr<SensorInterface> sensor, bool isDebug = false,
+                        bool isVirtual = false, int deviceId = RuntimeSensor::DEFAULT_DEVICE_ID);
+    bool registerVirtualSensor(std::shared_ptr<SensorInterface> sensor, bool isDebug = false);
+    bool registerDynamicSensorLocked(std::shared_ptr<SensorInterface> sensor, bool isDebug = false);
     bool unregisterDynamicSensorLocked(int handle);
     status_t cleanupWithoutDisable(const sp<SensorEventConnection>& connection, int handle);
     status_t cleanupWithoutDisableLocked(const sp<SensorEventConnection>& connection, int handle);
diff --git a/services/sensorservice/aidl/Android.bp b/services/sensorservice/aidl/Android.bp
index 34d1de7..542fcae 100644
--- a/services/sensorservice/aidl/Android.bp
+++ b/services/sensorservice/aidl/Android.bp
@@ -28,7 +28,7 @@
         "libbinder_ndk",
         "libsensor",
         "android.frameworks.sensorservice-V1-ndk",
-        "android.hardware.sensors-V1-ndk",
+        "android.hardware.sensors-V2-ndk",
     ],
     export_include_dirs: [
         "include/",
diff --git a/services/sensorservice/aidl/fuzzer/Android.bp b/services/sensorservice/aidl/fuzzer/Android.bp
index 0d6e476..5301fe9 100644
--- a/services/sensorservice/aidl/fuzzer/Android.bp
+++ b/services/sensorservice/aidl/fuzzer/Android.bp
@@ -18,7 +18,7 @@
         "libpermission",
         "android.frameworks.sensorservice-V1-ndk",
         "android.hardware.sensors-V1-convert",
-        "android.hardware.sensors-V1-ndk",
+        "android.hardware.sensors-V2-ndk",
         "android.hardware.common-V2-ndk",
         "libsensor",
         "libfakeservicemanager",
diff --git a/services/stats/StatsAidl.cpp b/services/stats/StatsAidl.cpp
index 9e13849..410a5af 100644
--- a/services/stats/StatsAidl.cpp
+++ b/services/stats/StatsAidl.cpp
@@ -30,14 +30,14 @@
 StatsHal::StatsHal() {}
 
 ndk::ScopedAStatus StatsHal::reportVendorAtom(const VendorAtom& vendorAtom) {
-    std::string reverseDomainName = (std::string) vendorAtom.reverseDomainName;
     if (vendorAtom.atomId < 100000 || vendorAtom.atomId >= 200000) {
         ALOGE("Atom ID %ld is not a valid vendor atom ID", (long) vendorAtom.atomId);
         return ndk::ScopedAStatus::fromServiceSpecificErrorWithMessage(
             -1, "Not a valid vendor atom ID");
     }
-    if (reverseDomainName.length() > 50) {
-        ALOGE("Vendor atom reverse domain name %s is too long.", reverseDomainName.c_str());
+    if (vendorAtom.reverseDomainName.length() > 50) {
+        ALOGE("Vendor atom reverse domain name %s is too long.",
+            vendorAtom.reverseDomainName.c_str());
         return ndk::ScopedAStatus::fromServiceSpecificErrorWithMessage(
             -1, "Vendor atom reverse domain name is too long");
     }
diff --git a/services/stats/StatsHal.cpp b/services/stats/StatsHal.cpp
index ae0a984..d27d989 100644
--- a/services/stats/StatsHal.cpp
+++ b/services/stats/StatsHal.cpp
@@ -112,13 +112,13 @@
 }
 
 hardware::Return<void> StatsHal::reportVendorAtom(const VendorAtom& vendorAtom) {
-    std::string reverseDomainName = (std::string) vendorAtom.reverseDomainName;
     if (vendorAtom.atomId < 100000 || vendorAtom.atomId >= 200000) {
         ALOGE("Atom ID %ld is not a valid vendor atom ID", (long) vendorAtom.atomId);
         return hardware::Void();
     }
-    if (reverseDomainName.length() > 50) {
-        ALOGE("Vendor atom reverse domain name %s is too long.", reverseDomainName.c_str());
+    if (vendorAtom.reverseDomainName.size() > 50) {
+        ALOGE("Vendor atom reverse domain name %s is too long.",
+              vendorAtom.reverseDomainName.c_str());
         return hardware::Void();
     }
     AStatsEvent* event = AStatsEvent_obtain();
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index b1bd705..e0dcab5 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -26,8 +26,8 @@
     name: "libsurfaceflinger_defaults",
     defaults: [
         "android.hardware.graphics.composer3-ndk_shared",
+        "librenderengine_deps",
         "surfaceflinger_defaults",
-        "skia_renderengine_deps",
     ],
     cflags: [
         "-DLOG_TAG=\"SurfaceFlinger\"",
@@ -157,6 +157,7 @@
         "EventLog/EventLog.cpp",
         "FrontEnd/LayerCreationArgs.cpp",
         "FrontEnd/LayerHandle.cpp",
+        "FrontEnd/LayerHierarchy.cpp",
         "FrontEnd/LayerLifecycleManager.cpp",
         "FrontEnd/RequestedLayerState.cpp",
         "FrontEnd/TransactionHandler.cpp",
@@ -165,7 +166,6 @@
         "FrameTracer/FrameTracer.cpp",
         "FrameTracker.cpp",
         "HdrLayerInfoReporter.cpp",
-        "HwcSlotGenerator.cpp",
         "WindowInfosListenerInvoker.cpp",
         "Layer.cpp",
         "LayerFE.cpp",
diff --git a/services/surfaceflinger/ClientCache.cpp b/services/surfaceflinger/ClientCache.cpp
index 2bd8f32..09e41ff 100644
--- a/services/surfaceflinger/ClientCache.cpp
+++ b/services/surfaceflinger/ClientCache.cpp
@@ -118,7 +118,8 @@
                                                                  Usage::READABLE));
 }
 
-void ClientCache::erase(const client_cache_t& cacheId) {
+sp<GraphicBuffer> ClientCache::erase(const client_cache_t& cacheId) {
+    sp<GraphicBuffer> buffer;
     auto& [processToken, id] = cacheId;
     std::vector<sp<ErasedRecipient>> pendingErase;
     {
@@ -126,9 +127,11 @@
         ClientCacheBuffer* buf = nullptr;
         if (!getBuffer(cacheId, &buf)) {
             ALOGE("failed to erase buffer, could not retrieve buffer");
-            return;
+            return nullptr;
         }
 
+        buffer = buf->buffer->getBuffer();
+
         for (auto& recipient : buf->recipients) {
             sp<ErasedRecipient> erasedRecipient = recipient.promote();
             if (erasedRecipient) {
@@ -142,6 +145,7 @@
     for (auto& recipient : pendingErase) {
         recipient->bufferErased(cacheId);
     }
+    return buffer;
 }
 
 std::shared_ptr<renderengine::ExternalTexture> ClientCache::get(const client_cache_t& cacheId) {
diff --git a/services/surfaceflinger/ClientCache.h b/services/surfaceflinger/ClientCache.h
index cdeac2b..b56b252 100644
--- a/services/surfaceflinger/ClientCache.h
+++ b/services/surfaceflinger/ClientCache.h
@@ -33,6 +33,17 @@
 
 namespace android {
 
+// This class manages a cache of buffer handles between SurfaceFlinger clients
+// and the SurfaceFlinger process which optimizes away some of the cost of
+// sending buffer handles across processes.
+//
+// Buffers are explicitly cached and uncached by the SurfaceFlinger client. When
+// a buffer is uncached, it is not only purged from this cache, but the buffer
+// ID is also passed down to CompositionEngine to purge it from a similar cache
+// used between SurfaceFlinger and Composer HAL. The buffer ID used to purge
+// both the SurfaceFlinger side of this other cache, as well as Composer HAL's
+// side of the cache.
+//
 class ClientCache : public Singleton<ClientCache> {
 public:
     ClientCache();
@@ -41,7 +52,8 @@
 
     base::expected<std::shared_ptr<renderengine::ExternalTexture>, AddError> add(
             const client_cache_t& cacheId, const sp<GraphicBuffer>& buffer);
-    void erase(const client_cache_t& cacheId);
+
+    sp<GraphicBuffer> erase(const client_cache_t& cacheId);
 
     std::shared_ptr<renderengine::ExternalTexture> get(const client_cache_t& cacheId);
 
diff --git a/services/surfaceflinger/CompositionEngine/Android.bp b/services/surfaceflinger/CompositionEngine/Android.bp
index 30d34a5..f3a0186 100644
--- a/services/surfaceflinger/CompositionEngine/Android.bp
+++ b/services/surfaceflinger/CompositionEngine/Android.bp
@@ -11,6 +11,7 @@
     name: "libcompositionengine_defaults",
     defaults: [
         "android.hardware.graphics.composer3-ndk_shared",
+        "librenderengine_deps",
         "surfaceflinger_defaults",
     ],
     cflags: [
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/CompositionRefreshArgs.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/CompositionRefreshArgs.h
index f861fc9..4777f13 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/CompositionRefreshArgs.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/CompositionRefreshArgs.h
@@ -52,6 +52,9 @@
     // All the layers that have queued updates.
     Layers layersWithQueuedFrames;
 
+    // All graphic buffers that will no longer be used and should be removed from caches.
+    std::vector<uint64_t> bufferIdsToUncache;
+
     // Controls how the color mode is chosen for an output
     OutputColorSetting outputColorSetting{OutputColorSetting::kEnhanced};
 
@@ -64,9 +67,6 @@
     // Used to correctly apply an inverse-display buffer transform if applicable
     ui::Transform::RotationFlags internalDisplayRotationFlags{ui::Transform::ROT_0};
 
-    // If true, GPU clocks will be increased when rendering blurs
-    bool blursAreExpensive{false};
-
     // If true, the complete output geometry needs to be recomputed this frame
     bool updatingOutputGeometryThisFrame{false};
 
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
index 974f7c6..ad98e93 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
@@ -163,7 +163,6 @@
 
     // The buffer and related state
     sp<GraphicBuffer> buffer;
-    int bufferSlot{BufferQueue::INVALID_BUFFER_SLOT};
     sp<Fence> acquireFence = Fence::NO_FENCE;
     Region surfaceDamage;
     uint64_t frameNumber = 0;
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
index 874b330..52ebd9e 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
@@ -23,6 +23,7 @@
 #include <type_traits>
 #include <unordered_map>
 #include <utility>
+#include <vector>
 
 #include <compositionengine/LayerFE.h>
 #include <renderengine/LayerSettings.h>
@@ -272,6 +273,7 @@
     virtual void setDisplayColorProfile(std::unique_ptr<DisplayColorProfile>) = 0;
     virtual void setRenderSurface(std::unique_ptr<RenderSurface>) = 0;
 
+    virtual void uncacheBuffers(const std::vector<uint64_t>&) = 0;
     virtual void rebuildLayerStacks(const CompositionRefreshArgs&, LayerFESet&) = 0;
     virtual void collectVisibleLayers(const CompositionRefreshArgs&, CoverageState&) = 0;
     virtual void ensureOutputLayerIfVisible(sp<LayerFE>&, CoverageState&) = 0;
@@ -288,12 +290,11 @@
     using GpuCompositionResult = compositionengine::impl::GpuCompositionResult;
     // Runs prepare frame in another thread while running client composition using
     // the previous frame's composition strategy.
-    virtual GpuCompositionResult prepareFrameAsync(const CompositionRefreshArgs&) = 0;
+    virtual GpuCompositionResult prepareFrameAsync() = 0;
     virtual void devOptRepaintFlash(const CompositionRefreshArgs&) = 0;
-    virtual void finishFrame(const CompositionRefreshArgs&, GpuCompositionResult&&) = 0;
+    virtual void finishFrame(GpuCompositionResult&&) = 0;
     virtual std::optional<base::unique_fd> composeSurfaces(
-            const Region&, const compositionengine::CompositionRefreshArgs&,
-            std::shared_ptr<renderengine::ExternalTexture>, base::unique_fd&) = 0;
+            const Region&, std::shared_ptr<renderengine::ExternalTexture>, base::unique_fd&) = 0;
     virtual void postFramebuffer() = 0;
     virtual void renderCachedSets(const CompositionRefreshArgs&) = 0;
     virtual bool chooseCompositionStrategy(
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h
index 6d0c395..4dbf8d2 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h
@@ -19,6 +19,7 @@
 #include <cstdint>
 #include <optional>
 #include <string>
+#include <vector>
 
 #include <ui/Transform.h>
 #include <utils/StrongPointer.h>
@@ -81,6 +82,10 @@
     // TODO(lpique): Make this protected once it is only internally called.
     virtual CompositionState& editState() = 0;
 
+    // Clear the cache entries for a set of buffers that SurfaceFlinger no
+    // longer cares about.
+    virtual void uncacheBuffers(const std::vector<uint64_t>& bufferIdsToUncache) = 0;
+
     // Recalculates the state of the output layer from the output-independent
     // layer. If includeGeometry is false, the geometry state can be skipped.
     // internalDisplayRotationFlags must be set to the rotation flags for the
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Display.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Display.h
index 33a10a3..6cf1d68 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Display.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Display.h
@@ -61,7 +61,7 @@
     bool getSkipColorTransform() const override;
     compositionengine::Output::FrameFences presentAndGetFrameFences() override;
     void setExpensiveRenderingExpected(bool) override;
-    void finishFrame(const CompositionRefreshArgs&, GpuCompositionResult&&) override;
+    void finishFrame(GpuCompositionResult&&) override;
 
     // compositionengine::Display overrides
     DisplayId getId() const override;
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/HwcBufferCache.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/HwcBufferCache.h
index fd22aa3..b6a4240 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/HwcBufferCache.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/HwcBufferCache.h
@@ -17,7 +17,8 @@
 #pragma once
 
 #include <cstdint>
-#include <vector>
+#include <stack>
+#include <unordered_map>
 
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic push
@@ -37,35 +38,76 @@
 
 namespace compositionengine::impl {
 
-// With HIDLized hwcomposer HAL, the HAL can maintain a buffer cache for each
-// HWC display and layer.  When updating a display target or a layer buffer,
-// we have the option to send the buffer handle over or to request the HAL to
-// retrieve it from its cache.  The latter is cheaper since it eliminates the
-// overhead to transfer the handle over the trasport layer, and the overhead
-// for the HAL to clone and retain the handle.
-//
-// To be able to find out whether a buffer is already in the HAL's cache, we
-// use HWComposerBufferCache to mirror the cache in SF.
-class HwcBufferCache {
-public:
-    HwcBufferCache();
-    // Given a buffer, return the HWC cache slot and
-    // buffer to be sent to HWC.
-    //
-    // outBuffer is set to buffer when buffer is not in the HWC cache;
-    // otherwise, outBuffer is set to nullptr.
-    void getHwcBuffer(int slot, const sp<GraphicBuffer>& buffer, uint32_t* outSlot,
-                      sp<GraphicBuffer>* outBuffer);
+// The buffer cache returns both a slot and the buffer that should be sent to HWC. In cases
+// where the buffer is already cached, the buffer is a nullptr and will not be sent to HWC as
+// an optimization.
+struct HwcSlotAndBuffer {
+    uint32_t slot;
+    sp<GraphicBuffer> buffer;
+};
 
-    // Special caching slot for the layer caching feature.
-    static const constexpr size_t FLATTENER_CACHING_SLOT = BufferQueue::NUM_BUFFER_SLOTS;
+//
+// Manages the slot assignments for a buffers stored in Composer HAL's cache.
+//
+// Cache slots are an optimization when communicating buffer handles to Composer
+// HAL. When updating a layer's buffer, we can either send a new buffer handle
+// along with it's slot assignment or request the HAL to reuse a buffer handle
+// that we've already sent by using the slot assignment. The latter is cheaper
+// since it eliminates the overhead to transfer the buffer handle over IPC and
+// the overhead for the HAL to clone the handle.
+//
+class HwcBufferCache {
+private:
+    static const constexpr size_t kMaxLayerBufferCount = BufferQueue::NUM_BUFFER_SLOTS;
+
+public:
+    // public for testing
+    // Override buffers don't use the normal cache slots because we don't want them to evict client
+    // buffers from the cache. We add an extra slot at the end for the override buffers.
+    static const constexpr size_t kOverrideBufferSlot = kMaxLayerBufferCount;
+
+    HwcBufferCache();
+
+    //
+    // Given a buffer, return the HWC cache slot and buffer to send to HWC.
+    //
+    // If the buffer is already in the cache, the buffer is null to optimize away sending HWC the
+    // buffer handle.
+    //
+    HwcSlotAndBuffer getHwcSlotAndBuffer(const sp<GraphicBuffer>& buffer);
+    //
+    // Given a buffer, return the HWC cache slot and buffer to send to HWC.
+    //
+    // A special slot number is used for override buffers.
+    //
+    // If the buffer is already in the cache, the buffer is null to optimize away sending HWC the
+    // buffer handle.
+    //
+    HwcSlotAndBuffer getOverrideHwcSlotAndBuffer(const sp<GraphicBuffer>& buffer);
+
+    //
+    // When a client process discards a buffer, it needs to be purged from the HWC cache.
+    //
+    // Returns the slot number of the buffer, or UINT32_MAX if it wasn't found in the cache.
+    //
+    uint32_t uncache(uint64_t graphicBufferId);
 
 private:
-    // an array where the index corresponds to a slot and the value corresponds to a (counter,
-    // buffer) pair. "counter" is a unique value that indicates the last time this slot was updated
-    // or used and allows us to keep track of the least-recently used buffer.
-    static const constexpr size_t kMaxLayerBufferCount = BufferQueue::NUM_BUFFER_SLOTS + 1;
-    wp<GraphicBuffer> mBuffers[kMaxLayerBufferCount];
+    uint32_t cache(const sp<GraphicBuffer>& buffer);
+    uint32_t getLeastRecentlyUsedSlot();
+
+    struct Cache {
+        sp<GraphicBuffer> buffer;
+        uint32_t slot;
+        // Cache entries are evicted according to least-recently-used when more than
+        // kMaxLayerBufferCount unique buffers have been sent to a layer.
+        uint64_t lruCounter;
+    };
+
+    std::unordered_map<uint64_t, Cache> mCacheByBufferId;
+    sp<GraphicBuffer> mLastOverrideBuffer;
+    std::stack<uint32_t> mFreeSlots;
+    uint64_t mLeastRecentlyUsedCounter;
 };
 
 } // namespace compositionengine::impl
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
index 9ca5da9..8ec77c0 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/Output.h
@@ -82,6 +82,7 @@
     void prepare(const CompositionRefreshArgs&, LayerFESet&) override;
     void present(const CompositionRefreshArgs&) override;
 
+    void uncacheBuffers(const std::vector<uint64_t>& bufferIdsToUncache) override;
     void rebuildLayerStacks(const CompositionRefreshArgs&, LayerFESet&) override;
     void collectVisibleLayers(const CompositionRefreshArgs&,
                               compositionengine::Output::CoverageState&) override;
@@ -95,11 +96,10 @@
     void updateColorProfile(const compositionengine::CompositionRefreshArgs&) override;
     void beginFrame() override;
     void prepareFrame() override;
-    GpuCompositionResult prepareFrameAsync(const CompositionRefreshArgs&) override;
+    GpuCompositionResult prepareFrameAsync() override;
     void devOptRepaintFlash(const CompositionRefreshArgs&) override;
-    void finishFrame(const CompositionRefreshArgs&, GpuCompositionResult&&) override;
+    void finishFrame(GpuCompositionResult&&) override;
     std::optional<base::unique_fd> composeSurfaces(const Region&,
-                                                   const compositionengine::CompositionRefreshArgs&,
                                                    std::shared_ptr<renderengine::ExternalTexture>,
                                                    base::unique_fd&) override;
     void postFramebuffer() override;
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayer.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayer.h
index 6d4abf9..f383392 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayer.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayer.h
@@ -20,6 +20,7 @@
 #include <memory>
 #include <optional>
 #include <string>
+#include <vector>
 
 #include <compositionengine/LayerFE.h>
 #include <compositionengine/OutputLayer.h>
@@ -44,6 +45,8 @@
 
     void setHwcLayer(std::shared_ptr<HWC2::Layer>) override;
 
+    void uncacheBuffers(const std::vector<uint64_t>& bufferIdsToUncache) override;
+
     void updateCompositionState(bool includeGeometry, bool forceClientComposition,
                                 ui::Transform::RotationFlags) override;
     void writeStateToHWC(bool includeGeometry, bool skipLayer, uint32_t z, bool zIsOverridden,
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
index 2b383c1..2a5bfae 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
@@ -136,6 +136,9 @@
         // cost of sending reused buffers to the HWC.
         HwcBufferCache hwcBufferCache;
 
+        // The previously-active buffer for this layer.
+        uint32_t activeBufferSlot;
+
         // Set to true when overridden info has been sent to HW composer
         bool stateOverridden = false;
 
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h
index 14922a4..12e063b 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h
@@ -36,6 +36,7 @@
     // sp<StrictMock<LayerFE>>::make()
     friend class sp<LayerFE>;
     friend class testing::StrictMock<LayerFE>;
+    friend class testing::NiceMock<LayerFE>;
 
 public:
     virtual ~LayerFE();
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h
index 7592cac..a56fc79 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/Output.h
@@ -82,6 +82,7 @@
     MOCK_METHOD2(prepare, void(const compositionengine::CompositionRefreshArgs&, LayerFESet&));
     MOCK_METHOD1(present, void(const compositionengine::CompositionRefreshArgs&));
 
+    MOCK_METHOD1(uncacheBuffers, void(const std::vector<uint64_t>&));
     MOCK_METHOD2(rebuildLayerStacks,
                  void(const compositionengine::CompositionRefreshArgs&, LayerFESet&));
     MOCK_METHOD2(collectVisibleLayers,
@@ -99,7 +100,7 @@
     MOCK_METHOD0(beginFrame, void());
 
     MOCK_METHOD0(prepareFrame, void());
-    MOCK_METHOD1(prepareFrameAsync, GpuCompositionResult(const CompositionRefreshArgs&));
+    MOCK_METHOD0(prepareFrameAsync, GpuCompositionResult());
     MOCK_METHOD1(chooseCompositionStrategy,
                  bool(std::optional<android::HWComposer::DeviceRequestedChanges>*));
     MOCK_METHOD1(chooseCompositionStrategyAsync,
@@ -109,14 +110,12 @@
 
     MOCK_METHOD1(devOptRepaintFlash, void(const compositionengine::CompositionRefreshArgs&));
 
-    MOCK_METHOD2(finishFrame,
-                 void(const compositionengine::CompositionRefreshArgs&, GpuCompositionResult&&));
+    MOCK_METHOD1(finishFrame, void(GpuCompositionResult&&));
 
-    MOCK_METHOD4(composeSurfaces,
-                 std::optional<base::unique_fd>(
-                         const Region&,
-                         const compositionengine::CompositionRefreshArgs& refreshArgs,
-                         std::shared_ptr<renderengine::ExternalTexture>, base::unique_fd&));
+    MOCK_METHOD3(composeSurfaces,
+                 std::optional<base::unique_fd>(const Region&,
+                                                std::shared_ptr<renderengine::ExternalTexture>,
+                                                base::unique_fd&));
     MOCK_CONST_METHOD0(getSkipColorTransform, bool());
 
     MOCK_METHOD0(postFramebuffer, void());
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/OutputLayer.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/OutputLayer.h
index c22f1bf..5fef63a 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/OutputLayer.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/OutputLayer.h
@@ -35,6 +35,8 @@
 
     MOCK_METHOD1(setHwcLayer, void(std::shared_ptr<HWC2::Layer>));
 
+    MOCK_METHOD1(uncacheBuffers, void(const std::vector<uint64_t>&));
+
     MOCK_CONST_METHOD0(getOutput, const compositionengine::Output&());
     MOCK_CONST_METHOD0(getLayerFE, compositionengine::LayerFE&());
 
diff --git a/services/surfaceflinger/CompositionEngine/src/Display.cpp b/services/surfaceflinger/CompositionEngine/src/Display.cpp
index 24669c2..d50a768 100644
--- a/services/surfaceflinger/CompositionEngine/src/Display.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Display.cpp
@@ -428,8 +428,7 @@
     mPowerAdvisor->setGpuFenceTime(mId, std::move(gpuFence));
 }
 
-void Display::finishFrame(const compositionengine::CompositionRefreshArgs& refreshArgs,
-                          GpuCompositionResult&& result) {
+void Display::finishFrame(GpuCompositionResult&& result) {
     // We only need to actually compose the display if:
     // 1) It is being handled by hardware composer, which may need this to
     //    keep its virtual display state machine in sync, or
@@ -439,7 +438,7 @@
         return;
     }
 
-    impl::Output::finishFrame(refreshArgs, std::move(result));
+    impl::Output::finishFrame(std::move(result));
 }
 
 } // namespace android::compositionengine::impl
diff --git a/services/surfaceflinger/CompositionEngine/src/HwcBufferCache.cpp b/services/surfaceflinger/CompositionEngine/src/HwcBufferCache.cpp
index f95382d..34ed214 100644
--- a/services/surfaceflinger/CompositionEngine/src/HwcBufferCache.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/HwcBufferCache.cpp
@@ -16,43 +16,80 @@
 
 #include <compositionengine/impl/HwcBufferCache.h>
 
-// TODO(b/129481165): remove the #pragma below and fix conversion issues
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wconversion"
-
 #include <gui/BufferQueue.h>
 #include <ui/GraphicBuffer.h>
 
-// TODO(b/129481165): remove the #pragma below and fix conversion issues
-#pragma clang diagnostic pop // ignored "-Wconversion"
-
 namespace android::compositionengine::impl {
 
 HwcBufferCache::HwcBufferCache() {
-    std::fill(std::begin(mBuffers), std::end(mBuffers), wp<GraphicBuffer>(nullptr));
+    for (uint32_t i = kMaxLayerBufferCount; i-- > 0;) {
+        mFreeSlots.push(i);
+    }
 }
 
-void HwcBufferCache::getHwcBuffer(int slot, const sp<GraphicBuffer>& buffer, uint32_t* outSlot,
-                                  sp<GraphicBuffer>* outBuffer) {
-    // default is 0
-    if (slot == BufferQueue::INVALID_BUFFER_SLOT || slot < 0 ||
-        slot >= static_cast<int32_t>(kMaxLayerBufferCount)) {
-        *outSlot = 0;
-    } else {
-        *outSlot = static_cast<uint32_t>(slot);
+HwcSlotAndBuffer HwcBufferCache::getHwcSlotAndBuffer(const sp<GraphicBuffer>& buffer) {
+    // TODO(b/261930578): This is for unit tests which don't mock GraphicBuffers but instead send
+    // in nullptrs.
+    if (buffer == nullptr) {
+        return {0, nullptr};
     }
-
-    auto& currentBuffer = mBuffers[*outSlot];
-    wp<GraphicBuffer> weakCopy(buffer);
-    if (currentBuffer == weakCopy) {
-        // already cached in HWC, skip sending the buffer
-        *outBuffer = nullptr;
-    } else {
-        *outBuffer = buffer;
-
-        // update cache
-        currentBuffer = buffer;
+    if (auto i = mCacheByBufferId.find(buffer->getId()); i != mCacheByBufferId.end()) {
+        Cache& cache = i->second;
+        // mark this cache slot as more recently used so it won't get evicted anytime soon
+        cache.lruCounter = mLeastRecentlyUsedCounter++;
+        return {cache.slot, nullptr};
     }
+    return {cache(buffer), buffer};
+}
+
+HwcSlotAndBuffer HwcBufferCache::getOverrideHwcSlotAndBuffer(const sp<GraphicBuffer>& buffer) {
+    if (buffer == mLastOverrideBuffer) {
+        return {kOverrideBufferSlot, nullptr};
+    }
+    mLastOverrideBuffer = buffer;
+    return {kOverrideBufferSlot, buffer};
+}
+
+uint32_t HwcBufferCache::uncache(uint64_t bufferId) {
+    if (auto i = mCacheByBufferId.find(bufferId); i != mCacheByBufferId.end()) {
+        uint32_t slot = i->second.slot;
+        mCacheByBufferId.erase(i);
+        mFreeSlots.push(slot);
+        return slot;
+    }
+    if (mLastOverrideBuffer && bufferId == mLastOverrideBuffer->getId()) {
+        mLastOverrideBuffer = nullptr;
+        return kOverrideBufferSlot;
+    }
+    return UINT32_MAX;
+}
+
+uint32_t HwcBufferCache::cache(const sp<GraphicBuffer>& buffer) {
+    Cache cache;
+    cache.slot = getLeastRecentlyUsedSlot();
+    cache.lruCounter = mLeastRecentlyUsedCounter++;
+    cache.buffer = buffer;
+    mCacheByBufferId.emplace(buffer->getId(), cache);
+    return cache.slot;
+}
+
+uint32_t HwcBufferCache::getLeastRecentlyUsedSlot() {
+    if (mFreeSlots.empty()) {
+        assert(!mCacheByBufferId.empty());
+        // evict the least recently used cache entry
+        auto cacheToErase = mCacheByBufferId.begin();
+        for (auto i = cacheToErase; i != mCacheByBufferId.end(); ++i) {
+            if (i->second.lruCounter < cacheToErase->second.lruCounter) {
+                cacheToErase = i;
+            }
+        }
+        uint32_t slot = cacheToErase->second.slot;
+        mCacheByBufferId.erase(cacheToErase);
+        mFreeSlots.push(slot);
+    }
+    uint32_t slot = mFreeSlots.top();
+    mFreeSlots.pop();
+    return slot;
 }
 
 } // namespace android::compositionengine::impl
diff --git a/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp b/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp
index 6631a27..a405c4d 100644
--- a/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/LayerFECompositionState.cpp
@@ -106,7 +106,6 @@
     dumpVal(out, "composition type", toString(compositionType), compositionType);
 
     out.append("\n      buffer: ");
-    dumpVal(out, "slot", bufferSlot);
     dumpVal(out, "buffer", buffer.get());
 
     out.append("\n      ");
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 3ee8017..d513731 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -428,6 +428,7 @@
     ALOGV(__FUNCTION__);
 
     rebuildLayerStacks(refreshArgs, geomSnapshots);
+    uncacheBuffers(refreshArgs.bufferIdsToUncache);
 }
 
 void Output::present(const compositionengine::CompositionRefreshArgs& refreshArgs) {
@@ -444,17 +445,26 @@
     GpuCompositionResult result;
     const bool predictCompositionStrategy = canPredictCompositionStrategy(refreshArgs);
     if (predictCompositionStrategy) {
-        result = prepareFrameAsync(refreshArgs);
+        result = prepareFrameAsync();
     } else {
         prepareFrame();
     }
 
     devOptRepaintFlash(refreshArgs);
-    finishFrame(refreshArgs, std::move(result));
+    finishFrame(std::move(result));
     postFramebuffer();
     renderCachedSets(refreshArgs);
 }
 
+void Output::uncacheBuffers(std::vector<uint64_t> const& bufferIdsToUncache) {
+    if (bufferIdsToUncache.empty()) {
+        return;
+    }
+    for (auto outputLayer : getOutputLayersOrderedByZ()) {
+        outputLayer->uncacheBuffers(bufferIdsToUncache);
+    }
+}
+
 void Output::rebuildLayerStacks(const compositionengine::CompositionRefreshArgs& refreshArgs,
                                 LayerFESet& layerFESet) {
     ATRACE_CALL();
@@ -1059,7 +1069,7 @@
             [&, changes]() { return chooseCompositionStrategy(changes); });
 }
 
-GpuCompositionResult Output::prepareFrameAsync(const CompositionRefreshArgs& refreshArgs) {
+GpuCompositionResult Output::prepareFrameAsync() {
     ATRACE_CALL();
     ALOGV(__FUNCTION__);
     auto& state = editState();
@@ -1079,7 +1089,7 @@
     GpuCompositionResult compositionResult;
     if (dequeueSucceeded) {
         std::optional<base::unique_fd> optFd =
-                composeSurfaces(Region::INVALID_REGION, refreshArgs, buffer, bufferFence);
+                composeSurfaces(Region::INVALID_REGION, buffer, bufferFence);
         if (optFd) {
             compositionResult.fence = std::move(*optFd);
         }
@@ -1117,7 +1127,7 @@
             std::shared_ptr<renderengine::ExternalTexture> buffer;
             updateProtectedContentState();
             dequeueRenderBuffer(&bufferFence, &buffer);
-            static_cast<void>(composeSurfaces(dirtyRegion, refreshArgs, buffer, bufferFence));
+            static_cast<void>(composeSurfaces(dirtyRegion, buffer, bufferFence));
             mRenderSurface->queueBuffer(base::unique_fd());
         }
     }
@@ -1129,7 +1139,7 @@
     prepareFrame();
 }
 
-void Output::finishFrame(const CompositionRefreshArgs& refreshArgs, GpuCompositionResult&& result) {
+void Output::finishFrame(GpuCompositionResult&& result) {
     ATRACE_CALL();
     ALOGV(__FUNCTION__);
     const auto& outputState = getState();
@@ -1154,7 +1164,7 @@
         }
         // Repaint the framebuffer (if needed), getting the optional fence for when
         // the composition completes.
-        optReadyFence = composeSurfaces(Region::INVALID_REGION, refreshArgs, buffer, bufferFence);
+        optReadyFence = composeSurfaces(Region::INVALID_REGION, buffer, bufferFence);
     }
     if (!optReadyFence) {
         return;
@@ -1208,8 +1218,8 @@
 }
 
 std::optional<base::unique_fd> Output::composeSurfaces(
-        const Region& debugRegion, const compositionengine::CompositionRefreshArgs& refreshArgs,
-        std::shared_ptr<renderengine::ExternalTexture> tex, base::unique_fd& fd) {
+        const Region& debugRegion, std::shared_ptr<renderengine::ExternalTexture> tex,
+        base::unique_fd& fd) {
     ATRACE_CALL();
     ALOGV(__FUNCTION__);
 
@@ -1265,9 +1275,7 @@
     // or complex GPU shaders and it's expensive. We boost the GPU frequency so that
     // GPU composition can finish in time. We must reset GPU frequency afterwards,
     // because high frequency consumes extra battery.
-    const bool expensiveBlurs =
-            refreshArgs.blursAreExpensive && mLayerRequestingBackgroundBlur != nullptr;
-    const bool expensiveRenderingExpected = expensiveBlurs ||
+    const bool expensiveRenderingExpected =
             std::any_of(clientCompositionLayers.begin(), clientCompositionLayers.end(),
                         [outputDataspace =
                                  clientCompositionDisplay.outputDataspace](const auto& layer) {
diff --git a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
index a39c527..766d7ea 100644
--- a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
@@ -610,6 +610,29 @@
     }
 }
 
+void OutputLayer::uncacheBuffers(const std::vector<uint64_t>& bufferIdsToUncache) {
+    auto& state = editState();
+    // Skip doing this if there is no HWC interface
+    if (!state.hwc) {
+        return;
+    }
+
+    std::vector<uint32_t> slotsToClear;
+    for (uint64_t bufferId : bufferIdsToUncache) {
+        uint32_t slot = state.hwc->hwcBufferCache.uncache(bufferId);
+        if (slot != UINT32_MAX) {
+            slotsToClear.push_back(slot);
+        }
+    }
+
+    hal::Error error =
+            state.hwc->hwcLayer->setBufferSlotsToClear(slotsToClear, state.hwc->activeBufferSlot);
+    if (error != hal::Error::NONE) {
+        ALOGE("[%s] Failed to clear buffer slots: %s (%d)", getLayerFE().getDebugName(),
+              to_string(error).c_str(), static_cast<int32_t>(error));
+    }
+}
+
 void OutputLayer::writeBufferStateToHWC(HWC2::Layer* hwcLayer,
                                         const LayerFECompositionState& outputIndependentState,
                                         bool skipLayer) {
@@ -622,27 +645,34 @@
               to_string(error).c_str(), static_cast<int32_t>(error));
     }
 
-    sp<GraphicBuffer> buffer = outputIndependentState.buffer;
-    sp<Fence> acquireFence = outputIndependentState.acquireFence;
-    int slot = outputIndependentState.bufferSlot;
-    if (getState().overrideInfo.buffer != nullptr && !skipLayer) {
-        buffer = getState().overrideInfo.buffer->getBuffer();
-        acquireFence = getState().overrideInfo.acquireFence;
-        slot = HwcBufferCache::FLATTENER_CACHING_SLOT;
+    HwcSlotAndBuffer hwcSlotAndBuffer;
+    sp<Fence> hwcFence;
+    {
+        // Editing the state only because we update the HWC buffer cache and active buffer.
+        auto& state = editState();
+        // Override buffers use a special cache slot so that they don't evict client buffers.
+        if (state.overrideInfo.buffer != nullptr && !skipLayer) {
+            hwcSlotAndBuffer = state.hwc->hwcBufferCache.getOverrideHwcSlotAndBuffer(
+                    state.overrideInfo.buffer->getBuffer());
+            hwcFence = state.overrideInfo.acquireFence;
+        } else {
+            hwcSlotAndBuffer =
+                    state.hwc->hwcBufferCache.getHwcSlotAndBuffer(outputIndependentState.buffer);
+            hwcFence = outputIndependentState.acquireFence;
+        }
+
+        // Keep track of the active buffer slot, so we can restore it after clearing other buffer
+        // slots.
+        if (hwcSlotAndBuffer.buffer) {
+            state.hwc->activeBufferSlot = hwcSlotAndBuffer.slot;
+        }
     }
 
-    ALOGV("Writing buffer %p", buffer.get());
-
-    uint32_t hwcSlot = 0;
-    sp<GraphicBuffer> hwcBuffer;
-    // We need access to the output-dependent state for the buffer cache there,
-    // though otherwise the buffer is not output-dependent.
-    editState().hwc->hwcBufferCache.getHwcBuffer(slot, buffer, &hwcSlot, &hwcBuffer);
-
-    if (auto error = hwcLayer->setBuffer(hwcSlot, hwcBuffer, acquireFence);
+    if (auto error = hwcLayer->setBuffer(hwcSlotAndBuffer.slot, hwcSlotAndBuffer.buffer, hwcFence);
         error != hal::Error::NONE) {
-        ALOGE("[%s] Failed to set buffer %p: %s (%d)", getLayerFE().getDebugName(), buffer->handle,
-              to_string(error).c_str(), static_cast<int32_t>(error));
+        ALOGE("[%s] Failed to set buffer %p: %s (%d)", getLayerFE().getDebugName(),
+              hwcSlotAndBuffer.buffer->handle, to_string(error).c_str(),
+              static_cast<int32_t>(error));
     }
 }
 
diff --git a/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp b/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp
index 95459c0..0756c1b 100644
--- a/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp
@@ -959,7 +959,7 @@
     mDisplay->editState().layerStackSpace.setContent(Rect(0, 0, 1, 1));
     mDisplay->editState().dirtyRegion = Region::INVALID_REGION;
 
-    mDisplay->finishFrame({}, std::move(mResultWithBuffer));
+    mDisplay->finishFrame(std::move(mResultWithBuffer));
 }
 
 TEST_F(DisplayFinishFrameTest, skipsCompositionIfNotDirty) {
@@ -980,7 +980,7 @@
     gpuDisplay->editState().lastCompositionHadVisibleLayers = true;
 
     gpuDisplay->beginFrame();
-    gpuDisplay->finishFrame({}, std::move(mResultWithoutBuffer));
+    gpuDisplay->finishFrame(std::move(mResultWithoutBuffer));
 }
 
 TEST_F(DisplayFinishFrameTest, skipsCompositionIfEmpty) {
@@ -1001,7 +1001,7 @@
     gpuDisplay->editState().lastCompositionHadVisibleLayers = false;
 
     gpuDisplay->beginFrame();
-    gpuDisplay->finishFrame({}, std::move(mResultWithoutBuffer));
+    gpuDisplay->finishFrame(std::move(mResultWithoutBuffer));
 }
 
 TEST_F(DisplayFinishFrameTest, performsCompositionIfDirtyAndNotEmpty) {
@@ -1022,7 +1022,7 @@
     gpuDisplay->editState().lastCompositionHadVisibleLayers = true;
 
     gpuDisplay->beginFrame();
-    gpuDisplay->finishFrame({}, std::move(mResultWithBuffer));
+    gpuDisplay->finishFrame(std::move(mResultWithBuffer));
 }
 
 /*
diff --git a/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp b/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp
index 7197780..c5fb594 100644
--- a/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp
@@ -22,66 +22,172 @@
 namespace android::compositionengine {
 namespace {
 
-class TestableHwcBufferCache : public impl::HwcBufferCache {
-public:
-    void getHwcBuffer(int slot, const sp<GraphicBuffer>& buffer, uint32_t* outSlot,
-                      sp<GraphicBuffer>* outBuffer) {
-        HwcBufferCache::getHwcBuffer(slot, buffer, outSlot, outBuffer);
-    }
-};
+using impl::HwcBufferCache;
+using impl::HwcSlotAndBuffer;
 
 class HwcBufferCacheTest : public testing::Test {
 public:
     ~HwcBufferCacheTest() override = default;
 
-    void testSlot(const int inSlot, const uint32_t expectedSlot) {
-        uint32_t outSlot;
-        sp<GraphicBuffer> outBuffer;
-
-        // The first time, the output  is the same as the input
-        mCache.getHwcBuffer(inSlot, mBuffer1, &outSlot, &outBuffer);
-        EXPECT_EQ(expectedSlot, outSlot);
-        EXPECT_EQ(mBuffer1, outBuffer);
-
-        // The second time with the same buffer, the outBuffer is nullptr.
-        mCache.getHwcBuffer(inSlot, mBuffer1, &outSlot, &outBuffer);
-        EXPECT_EQ(expectedSlot, outSlot);
-        EXPECT_EQ(nullptr, outBuffer.get());
-
-        // With a new buffer, the outBuffer is the input.
-        mCache.getHwcBuffer(inSlot, mBuffer2, &outSlot, &outBuffer);
-        EXPECT_EQ(expectedSlot, outSlot);
-        EXPECT_EQ(mBuffer2, outBuffer);
-
-        // Again, the second request with the same buffer sets outBuffer to nullptr.
-        mCache.getHwcBuffer(inSlot, mBuffer2, &outSlot, &outBuffer);
-        EXPECT_EQ(expectedSlot, outSlot);
-        EXPECT_EQ(nullptr, outBuffer.get());
-
-        // Setting a slot to use nullptr lookslike works, but note that
-        // the output values make it look like no new buffer is being set....
-        mCache.getHwcBuffer(inSlot, sp<GraphicBuffer>(), &outSlot, &outBuffer);
-        EXPECT_EQ(expectedSlot, outSlot);
-        EXPECT_EQ(nullptr, outBuffer.get());
-    }
-
-    impl::HwcBufferCache mCache;
     sp<GraphicBuffer> mBuffer1 =
             sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
     sp<GraphicBuffer> mBuffer2 =
             sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
 };
 
-TEST_F(HwcBufferCacheTest, cacheWorksForSlotZero) {
-    testSlot(0, 0);
+TEST_F(HwcBufferCacheTest, getHwcSlotAndBuffer_returnsUniqueSlotNumberForEachBuffer) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    HwcSlotAndBuffer slotAndBufferFor1 = cache.getHwcSlotAndBuffer(mBuffer1);
+    EXPECT_NE(slotAndBufferFor1.slot, UINT32_MAX);
+    EXPECT_EQ(slotAndBufferFor1.buffer, mBuffer1);
+
+    HwcSlotAndBuffer slotAndBufferFor2 = cache.getHwcSlotAndBuffer(mBuffer2);
+    EXPECT_NE(slotAndBufferFor2.slot, slotAndBufferFor1.slot);
+    EXPECT_NE(slotAndBufferFor2.slot, UINT32_MAX);
+    EXPECT_EQ(slotAndBufferFor2.buffer, mBuffer2);
 }
 
-TEST_F(HwcBufferCacheTest, cacheWorksForMaxSlot) {
-    testSlot(BufferQueue::NUM_BUFFER_SLOTS - 1, BufferQueue::NUM_BUFFER_SLOTS - 1);
+TEST_F(HwcBufferCacheTest, getHwcSlotAndBuffer_whenCached_returnsSameSlotNumberAndNullBuffer) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    HwcSlotAndBuffer originalSlotAndBuffer = cache.getHwcSlotAndBuffer(mBuffer1);
+    EXPECT_NE(originalSlotAndBuffer.slot, UINT32_MAX);
+    EXPECT_EQ(originalSlotAndBuffer.buffer, mBuffer1);
+
+    HwcSlotAndBuffer finalSlotAndBuffer = cache.getHwcSlotAndBuffer(mBuffer1);
+    EXPECT_EQ(finalSlotAndBuffer.slot, originalSlotAndBuffer.slot);
+    EXPECT_EQ(finalSlotAndBuffer.buffer, nullptr);
 }
 
-TEST_F(HwcBufferCacheTest, cacheMapsNegativeSlotToZero) {
-    testSlot(-123, 0);
+TEST_F(HwcBufferCacheTest, getHwcSlotAndBuffer_whenSlotsFull_evictsOldestCachedBuffer) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    sp<GraphicBuffer> graphicBuffers[100];
+    HwcSlotAndBuffer slotsAndBuffers[100];
+    int finalCachedBufferIndex = 0;
+    for (int i = 0; i < 100; ++i) {
+        graphicBuffers[i] = sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
+        slotsAndBuffers[i] = cache.getHwcSlotAndBuffer(graphicBuffers[i]);
+        // we fill up the cache when the slot number for the first buffer is reused
+        if (i > 0 && slotsAndBuffers[i].slot == slotsAndBuffers[0].slot) {
+            finalCachedBufferIndex = i;
+            break;
+        }
+    }
+    ASSERT_GT(finalCachedBufferIndex, 1);
+    // the final cached buffer has the same slot value as the oldest buffer
+    EXPECT_EQ(slotsAndBuffers[finalCachedBufferIndex].slot, slotsAndBuffers[0].slot);
+    // the oldest buffer is no longer in the cache because it was evicted
+    EXPECT_EQ(cache.uncache(graphicBuffers[0]->getId()), UINT32_MAX);
+}
+
+TEST_F(HwcBufferCacheTest, uncache_whenCached_returnsSlotNumber) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    HwcSlotAndBuffer slotAndBufferFor1 = cache.getHwcSlotAndBuffer(mBuffer1);
+    ASSERT_NE(slotAndBufferFor1.slot, UINT32_MAX);
+
+    HwcSlotAndBuffer slotAndBufferFor2 = cache.getHwcSlotAndBuffer(mBuffer2);
+    ASSERT_NE(slotAndBufferFor2.slot, UINT32_MAX);
+
+    // the 1st buffer should be found in the cache with a slot number
+    EXPECT_EQ(cache.uncache(mBuffer1->getId()), slotAndBufferFor1.slot);
+    // since the 1st buffer has been previously uncached, we should no longer receive a slot number
+    EXPECT_EQ(cache.uncache(mBuffer1->getId()), UINT32_MAX);
+    // the 2nd buffer should be still found in the cache with a slot number
+    EXPECT_EQ(cache.uncache(mBuffer2->getId()), slotAndBufferFor2.slot);
+    // since the 2nd buffer has been previously uncached, we should no longer receive a slot number
+    EXPECT_EQ(cache.uncache(mBuffer2->getId()), UINT32_MAX);
+}
+
+TEST_F(HwcBufferCacheTest, uncache_whenUncached_returnsInvalidSlotNumber) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    HwcSlotAndBuffer slotAndBufferFor1 = cache.getHwcSlotAndBuffer(mBuffer1);
+    ASSERT_NE(slotAndBufferFor1.slot, UINT32_MAX);
+
+    EXPECT_EQ(cache.uncache(mBuffer2->getId()), UINT32_MAX);
+}
+
+TEST_F(HwcBufferCacheTest, getOverrideHwcSlotAndBuffer_whenCached_returnsSameSlotAndNullBuffer) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    HwcSlotAndBuffer originalSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
+    EXPECT_NE(originalSlotAndBuffer.slot, UINT32_MAX);
+    EXPECT_EQ(originalSlotAndBuffer.buffer, mBuffer1);
+
+    HwcSlotAndBuffer finalSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
+    EXPECT_EQ(finalSlotAndBuffer.slot, originalSlotAndBuffer.slot);
+    EXPECT_EQ(finalSlotAndBuffer.buffer, nullptr);
+}
+
+TEST_F(HwcBufferCacheTest, getOverrideHwcSlotAndBuffer_whenSlotsFull_returnsIndependentSlot) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    sp<GraphicBuffer> graphicBuffers[100];
+    HwcSlotAndBuffer slotsAndBuffers[100];
+    int finalCachedBufferIndex = -1;
+    for (int i = 0; i < 100; ++i) {
+        graphicBuffers[i] = sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
+        slotsAndBuffers[i] = cache.getHwcSlotAndBuffer(graphicBuffers[i]);
+        // we fill up the cache when the slot number for the first buffer is reused
+        if (i > 0 && slotsAndBuffers[i].slot == slotsAndBuffers[0].slot) {
+            finalCachedBufferIndex = i;
+            break;
+        }
+    }
+    // expect to have cached at least a few buffers before evicting
+    ASSERT_GT(finalCachedBufferIndex, 1);
+
+    sp<GraphicBuffer> overrideBuffer =
+            sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
+    HwcSlotAndBuffer overrideSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(overrideBuffer);
+    // expect us to have a slot number
+    EXPECT_NE(overrideSlotAndBuffer.slot, UINT32_MAX);
+    // expect this to be the first time we cached the buffer
+    EXPECT_NE(overrideSlotAndBuffer.buffer, nullptr);
+
+    // expect the slot number to not equal any other slot number, even after the slots have been
+    // exhausted, indicating that the override buffer slot is independent from the slots for
+    // non-override buffers
+    for (int i = 0; i < finalCachedBufferIndex; ++i) {
+        EXPECT_NE(overrideSlotAndBuffer.slot, slotsAndBuffers[i].slot);
+    }
+    // the override buffer is independently uncached from the oldest cached buffer
+    // expect to find the override buffer still in the override buffer slot
+    EXPECT_EQ(cache.uncache(overrideBuffer->getId()), overrideSlotAndBuffer.slot);
+    // expect that the first buffer was not evicted from the cache when the override buffer was
+    // cached
+    EXPECT_EQ(cache.uncache(graphicBuffers[1]->getId()), slotsAndBuffers[1].slot);
+}
+
+TEST_F(HwcBufferCacheTest, uncache_whenOverrideCached_returnsSlotNumber) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    HwcSlotAndBuffer hwcSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
+    ASSERT_NE(hwcSlotAndBuffer.slot, UINT32_MAX);
+
+    EXPECT_EQ(cache.uncache(mBuffer1->getId()), hwcSlotAndBuffer.slot);
+    EXPECT_EQ(cache.uncache(mBuffer1->getId()), UINT32_MAX);
+}
+
+TEST_F(HwcBufferCacheTest, uncache_whenOverrideUncached_returnsInvalidSlotNumber) {
+    HwcBufferCache cache;
+    sp<GraphicBuffer> outBuffer;
+
+    HwcSlotAndBuffer hwcSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
+    ASSERT_NE(hwcSlotAndBuffer.slot, UINT32_MAX);
+
+    EXPECT_EQ(cache.uncache(mBuffer2->getId()), UINT32_MAX);
 }
 
 } // namespace
diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
index d933b94..b0b1a02 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
@@ -56,6 +56,7 @@
     MOCK_METHOD3(setBuffer,
                  Error(uint32_t, const android::sp<android::GraphicBuffer>&,
                        const android::sp<android::Fence>&));
+    MOCK_METHOD2(setBufferSlotsToClear, Error(const std::vector<uint32_t>&, uint32_t));
     MOCK_METHOD1(setSurfaceDamage, Error(const android::Region&));
     MOCK_METHOD1(setBlendMode, Error(hal::BlendMode));
     MOCK_METHOD1(setColor, Error(aidl::android::hardware::graphics::composer3::Color));
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
index 0f7dce8..0edc226 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
@@ -42,6 +42,8 @@
 
 using testing::_;
 using testing::InSequence;
+using testing::Mock;
+using testing::NiceMock;
 using testing::Return;
 using testing::ReturnRef;
 using testing::StrictMock;
@@ -82,13 +84,13 @@
 
 struct OutputLayerTest : public testing::Test {
     struct OutputLayer final : public impl::OutputLayer {
-        OutputLayer(const compositionengine::Output& output, sp<compositionengine::LayerFE> layerFE)
+        OutputLayer(const compositionengine::Output& output, compositionengine::LayerFE& layerFE)
               : mOutput(output), mLayerFE(layerFE) {}
         ~OutputLayer() override = default;
 
         // compositionengine::OutputLayer overrides
         const compositionengine::Output& getOutput() const override { return mOutput; }
-        compositionengine::LayerFE& getLayerFE() const override { return *mLayerFE; }
+        compositionengine::LayerFE& getLayerFE() const override { return mLayerFE; }
         const impl::OutputLayerCompositionState& getState() const override { return mState; }
         impl::OutputLayerCompositionState& editState() override { return mState; }
 
@@ -96,21 +98,22 @@
         void dumpState(std::string& out) const override { mState.dump(out); }
 
         const compositionengine::Output& mOutput;
-        sp<compositionengine::LayerFE> mLayerFE;
+        compositionengine::LayerFE& mLayerFE;
         impl::OutputLayerCompositionState mState;
     };
 
     OutputLayerTest() {
-        EXPECT_CALL(*mLayerFE, getDebugName()).WillRepeatedly(Return("Test LayerFE"));
-        EXPECT_CALL(mOutput, getName()).WillRepeatedly(ReturnRef(kOutputName));
+        ON_CALL(mLayerFE, getDebugName()).WillByDefault(Return("Test LayerFE"));
+        ON_CALL(mOutput, getName()).WillByDefault(ReturnRef(kOutputName));
 
-        EXPECT_CALL(*mLayerFE, getCompositionState()).WillRepeatedly(Return(&mLayerFEState));
-        EXPECT_CALL(mOutput, getState()).WillRepeatedly(ReturnRef(mOutputState));
+        ON_CALL(mLayerFE, getCompositionState()).WillByDefault(Return(&mLayerFEState));
+        ON_CALL(mOutput, getState()).WillByDefault(ReturnRef(mOutputState));
     }
 
-    compositionengine::mock::Output mOutput;
-    sp<StrictMock<compositionengine::mock::LayerFE>> mLayerFE =
-            sp<StrictMock<compositionengine::mock::LayerFE>>::make();
+    NiceMock<compositionengine::mock::Output> mOutput;
+    sp<NiceMock<compositionengine::mock::LayerFE>> mLayerFE_ =
+            sp<NiceMock<compositionengine::mock::LayerFE>>::make();
+    NiceMock<compositionengine::mock::LayerFE>& mLayerFE = *mLayerFE_;
     OutputLayer mOutputLayer{mOutput, mLayerFE};
 
     LayerFECompositionState mLayerFEState;
@@ -530,7 +533,7 @@
 
 struct OutputLayerPartialMockForUpdateCompositionState : public impl::OutputLayer {
     OutputLayerPartialMockForUpdateCompositionState(const compositionengine::Output& output,
-                                                    sp<compositionengine::LayerFE> layerFE)
+                                                    compositionengine::LayerFE& layerFE)
           : mOutput(output), mLayerFE(layerFE) {}
     // Mock everything called by updateCompositionState to simplify testing it.
     MOCK_CONST_METHOD1(calculateOutputSourceCrop, FloatRect(uint32_t));
@@ -539,7 +542,7 @@
 
     // compositionengine::OutputLayer overrides
     const compositionengine::Output& getOutput() const override { return mOutput; }
-    compositionengine::LayerFE& getLayerFE() const override { return *mLayerFE; }
+    compositionengine::LayerFE& getLayerFE() const override { return mLayerFE; }
     const impl::OutputLayerCompositionState& getState() const override { return mState; }
     impl::OutputLayerCompositionState& editState() override { return mState; }
 
@@ -547,7 +550,7 @@
     MOCK_CONST_METHOD1(dumpState, void(std::string&));
 
     const compositionengine::Output& mOutput;
-    sp<compositionengine::LayerFE> mLayerFE;
+    compositionengine::LayerFE& mLayerFE;
     impl::OutputLayerCompositionState mState;
 };
 
@@ -588,7 +591,7 @@
 };
 
 TEST_F(OutputLayerUpdateCompositionStateTest, doesNothingIfNoFECompositionState) {
-    EXPECT_CALL(*mLayerFE, getCompositionState()).WillOnce(Return(nullptr));
+    EXPECT_CALL(mLayerFE, getCompositionState()).WillOnce(Return(nullptr));
 
     mOutputLayer.updateCompositionState(true, false, ui::Transform::RotationFlags::ROT_90);
 }
@@ -774,7 +777,7 @@
     static constexpr ui::Dataspace kOverrideDataspace = static_cast<ui::Dataspace>(72);
     static constexpr int kSupportedPerFrameMetadata = 101;
     static constexpr int kExpectedHwcSlot = 0;
-    static constexpr int kOverrideHwcSlot = impl::HwcBufferCache::FLATTENER_CACHING_SLOT;
+    static constexpr int kOverrideHwcSlot = impl::HwcBufferCache::kOverrideBufferSlot;
     static constexpr bool kLayerGenericMetadata1Mandatory = true;
     static constexpr bool kLayerGenericMetadata2Mandatory = true;
     static constexpr float kWhitePointNits = 200.f;
@@ -823,7 +826,6 @@
         mLayerFEState.hdrMetadata = kHdrMetadata;
         mLayerFEState.sidebandStream = NativeHandle::create(kSidebandStreamHandle, false);
         mLayerFEState.buffer = kBuffer;
-        mLayerFEState.bufferSlot = BufferQueue::INVALID_BUFFER_SLOT;
         mLayerFEState.acquireFence = kFence;
 
         mOutputState.displayBrightnessNits = kDisplayBrightnessNits;
@@ -834,7 +836,6 @@
         EXPECT_CALL(mDisplayColorProfile, getSupportedPerFrameMetadata())
                 .WillRepeatedly(Return(kSupportedPerFrameMetadata));
     }
-
     // Some tests may need to simulate unsupported HWC calls
     enum class SimulateUnsupported { None, ColorTransform };
 
@@ -953,7 +954,10 @@
 const HdrMetadata OutputLayerWriteStateToHWCTest::kHdrMetadata{{/* LightFlattenable */}, 1029};
 native_handle_t* OutputLayerWriteStateToHWCTest::kSidebandStreamHandle =
         reinterpret_cast<native_handle_t*>(1031);
-const sp<GraphicBuffer> OutputLayerWriteStateToHWCTest::kBuffer;
+const sp<GraphicBuffer> OutputLayerWriteStateToHWCTest::kBuffer =
+        sp<GraphicBuffer>::make(1, 2, PIXEL_FORMAT_RGBA_8888,
+                                AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |
+                                        AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN);
 const sp<GraphicBuffer> OutputLayerWriteStateToHWCTest::kOverrideBuffer =
         sp<GraphicBuffer>::make(4, 5, PIXEL_FORMAT_RGBA_8888,
                                 AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |
@@ -969,7 +973,7 @@
         {4, 5, 6, 7}};
 
 TEST_F(OutputLayerWriteStateToHWCTest, doesNothingIfNoFECompositionState) {
-    EXPECT_CALL(*mLayerFE, getCompositionState()).WillOnce(Return(nullptr));
+    EXPECT_CALL(mLayerFE, getCompositionState()).WillOnce(Return(nullptr));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -994,7 +998,7 @@
     expectPerFrameCommonCalls();
 
     expectNoSetCompositionTypeCall();
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
+    EXPECT_CALL(mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1019,7 +1023,6 @@
     mLayerFEState.compositionType = Composition::SOLID_COLOR;
 
     expectPerFrameCommonCalls();
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
 
     // Setting the composition type should happen before setting the color. We
     // check this in this test only by setting up an testing::InSeqeuence
@@ -1039,8 +1042,6 @@
     expectSetSidebandHandleCall();
     expectSetCompositionTypeCall(Composition::SIDEBAND);
 
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
-
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
 }
@@ -1052,8 +1053,6 @@
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::CURSOR);
 
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
-
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
 }
@@ -1065,8 +1064,6 @@
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::DEVICE);
 
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
-
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
 }
@@ -1080,8 +1077,6 @@
     expectSetColorCall();
     expectNoSetCompositionTypeCall();
 
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
-
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
 }
@@ -1120,8 +1115,6 @@
     expectGenericLayerMetadataCalls();
     expectSetCompositionTypeCall(Composition::DEVICE);
 
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
-
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
 }
@@ -1134,8 +1127,6 @@
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::DEVICE);
 
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
-
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
 }
@@ -1150,7 +1141,6 @@
                               kOverrideSurfaceDamage, kOverrideLayerBrightness);
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::DEVICE);
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ true, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1166,7 +1156,6 @@
                               kOverrideSurfaceDamage, kOverrideLayerBrightness);
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::DEVICE);
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ true, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1182,7 +1171,6 @@
                               kOverrideSurfaceDamage, kOverrideLayerBrightness);
     expectSetHdrMetadataAndBufferCalls(kOverrideHwcSlot, kOverrideBuffer, kOverrideFence);
     expectSetCompositionTypeCall(Composition::DEVICE);
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1198,7 +1186,6 @@
                               kOverrideSurfaceDamage, kOverrideLayerBrightness);
     expectSetHdrMetadataAndBufferCalls(kOverrideHwcSlot, kOverrideBuffer, kOverrideFence);
     expectSetCompositionTypeCall(Composition::DEVICE);
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1213,7 +1200,6 @@
                               Region::INVALID_REGION);
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::DEVICE);
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1230,7 +1216,6 @@
                               Region::INVALID_REGION);
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::DEVICE);
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1248,22 +1233,20 @@
                               Region::INVALID_REGION);
     expectSetHdrMetadataAndBufferCalls();
     expectSetCompositionTypeCall(Composition::CLIENT);
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
 }
 
 TEST_F(OutputLayerWriteStateToHWCTest, peekThroughChangesBlendMode) {
-    auto peekThroughLayerFE = sp<compositionengine::mock::LayerFE>::make();
-    OutputLayer peekThroughLayer{mOutput, peekThroughLayerFE};
+    auto peekThroughLayerFE = sp<NiceMock<compositionengine::mock::LayerFE>>::make();
+    OutputLayer peekThroughLayer{mOutput, *peekThroughLayerFE};
 
     mOutputLayer.mState.overrideInfo.peekThroughLayer = &peekThroughLayer;
 
     expectGeometryCommonCalls(kDisplayFrame, kSourceCrop, kBufferTransform,
                               Hwc2::IComposerClient::BlendMode::PREMULTIPLIED);
     expectPerFrameCommonCalls();
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
@@ -1281,7 +1264,6 @@
 TEST_F(OutputLayerWriteStateToHWCTest, zIsOverriddenSetsOverride) {
     expectGeometryCommonCalls();
     expectPerFrameCommonCalls();
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(false));
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
                                  /*zIsOverridden*/ true, /*isPeekingThrough*/
@@ -1292,7 +1274,7 @@
 TEST_F(OutputLayerWriteStateToHWCTest, roundedCornersForceClientComposition) {
     expectGeometryCommonCalls();
     expectPerFrameCommonCalls();
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillOnce(Return(true));
+    EXPECT_CALL(mLayerFE, hasRoundedCorners()).WillOnce(Return(true));
     expectSetCompositionTypeCall(Composition::CLIENT);
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
@@ -1304,7 +1286,7 @@
     expectGeometryCommonCalls();
     expectPerFrameCommonCalls();
     expectSetHdrMetadataAndBufferCalls();
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(true));
+    EXPECT_CALL(mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(true));
     expectSetCompositionTypeCall(Composition::DEVICE);
 
     mLayerFEState.compositionType = Composition::DEVICE;
@@ -1323,7 +1305,6 @@
     expectPerFrameCommonCalls(SimulateUnsupported::None, kDataspace, kOutputSpaceVisibleRegion,
                               kSurfaceDamage, kLayerBrightness, blockingRegion);
     expectSetHdrMetadataAndBufferCalls();
-    EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
     expectSetCompositionTypeCall(Composition::DISPLAY_DECORATION);
 
     mOutputLayer.writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, 0,
@@ -1332,6 +1313,76 @@
 }
 
 /*
+ * OutputLayer::uncacheBuffers
+ */
+struct OutputLayerUncacheBufferTest : public OutputLayerTest {
+    static const sp<GraphicBuffer> kBuffer1;
+    static const sp<GraphicBuffer> kBuffer2;
+    static const sp<Fence> kFence;
+
+    OutputLayerUncacheBufferTest() {
+        auto& outputLayerState = mOutputLayer.editState();
+        outputLayerState.hwc = impl::OutputLayerCompositionState::Hwc(mHwcLayer_);
+
+        mLayerFEState.compositionType = Composition::DEVICE;
+        mLayerFEState.acquireFence = kFence;
+
+        ON_CALL(mOutput, getDisplayColorProfile()).WillByDefault(Return(&mDisplayColorProfile));
+    }
+
+    std::shared_ptr<HWC2::mock::Layer> mHwcLayer_{std::make_shared<NiceMock<HWC2::mock::Layer>>()};
+    HWC2::mock::Layer& mHwcLayer = *mHwcLayer_;
+    NiceMock<mock::DisplayColorProfile> mDisplayColorProfile;
+};
+
+const sp<GraphicBuffer> OutputLayerUncacheBufferTest::kBuffer1 =
+        sp<GraphicBuffer>::make(1, 2, PIXEL_FORMAT_RGBA_8888,
+                                AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |
+                                        AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN);
+const sp<GraphicBuffer> OutputLayerUncacheBufferTest::kBuffer2 =
+        sp<GraphicBuffer>::make(2, 3, PIXEL_FORMAT_RGBA_8888,
+                                AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |
+                                        AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN);
+const sp<Fence> OutputLayerUncacheBufferTest::kFence = sp<Fence>::make();
+
+TEST_F(OutputLayerUncacheBufferTest, canUncacheAndReuseSlot) {
+    // Buffer1 is stored in slot 0
+    mLayerFEState.buffer = kBuffer1;
+    EXPECT_CALL(mHwcLayer, setBuffer(/*slot*/ 0, kBuffer1, kFence));
+    mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
+                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
+    Mock::VerifyAndClearExpectations(&mHwcLayer);
+
+    // Buffer2 is stored in slot 1
+    mLayerFEState.buffer = kBuffer2;
+    EXPECT_CALL(mHwcLayer, setBuffer(/*slot*/ 1, kBuffer2, kFence));
+    mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
+                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
+    Mock::VerifyAndClearExpectations(&mHwcLayer);
+
+    // buffer slots are cleared in HWC
+    std::vector<uint32_t> slotsToClear = {0, 1};
+    EXPECT_CALL(mHwcLayer,
+                setBufferSlotsToClear(/*slotsToClear*/ slotsToClear, /*activeBufferSlot*/ 1));
+    mOutputLayer.uncacheBuffers({kBuffer1->getId(), kBuffer2->getId()});
+    Mock::VerifyAndClearExpectations(&mHwcLayer);
+
+    // rather than allocating a new slot, the active buffer slot (slot 1) is reused first to free
+    // the memory as soon as possible
+    mLayerFEState.buffer = kBuffer1;
+    EXPECT_CALL(mHwcLayer, setBuffer(/*slot*/ 1, kBuffer1, kFence));
+    mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
+                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
+    Mock::VerifyAndClearExpectations(&mHwcLayer);
+
+    // rather than allocating a new slot, slot 0 is reused
+    mLayerFEState.buffer = kBuffer2;
+    EXPECT_CALL(mHwcLayer, setBuffer(/*slot*/ 0, kBuffer2, kFence));
+    mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
+                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false);
+}
+
+/*
  * OutputLayer::writeCursorPositionToHWC()
  */
 
@@ -1359,7 +1410,7 @@
 const Rect OutputLayerWriteCursorPositionToHWCTest::kDefaultCursorFrame{1, 2, 3, 4};
 
 TEST_F(OutputLayerWriteCursorPositionToHWCTest, doesNothingIfNoFECompositionState) {
-    EXPECT_CALL(*mLayerFE, getCompositionState()).WillOnce(Return(nullptr));
+    EXPECT_CALL(mLayerFE, getCompositionState()).WillOnce(Return(nullptr));
 
     mOutputLayer.writeCursorPositionToHWC();
 }
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
index 2109987..aaf0f06 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
@@ -799,20 +799,17 @@
     EXPECT_CALL(*layer1.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer, updateCompositionState(false, false, ui::Transform::ROT_180));
     EXPECT_CALL(*layer2.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer3.outputLayer, updateCompositionState(false, false, ui::Transform::ROT_180));
     EXPECT_CALL(*layer3.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     injectOutputLayer(layer1);
     injectOutputLayer(layer2);
@@ -839,20 +836,17 @@
     EXPECT_CALL(*layer1.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer, updateCompositionState(true, false, ui::Transform::ROT_0));
     EXPECT_CALL(*layer2.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer3.outputLayer, updateCompositionState(true, false, ui::Transform::ROT_0));
     EXPECT_CALL(*layer3.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     injectOutputLayer(layer1);
     injectOutputLayer(layer2);
@@ -878,20 +872,17 @@
     EXPECT_CALL(*layer1.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer, updateCompositionState(false, true, ui::Transform::ROT_0));
     EXPECT_CALL(*layer2.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer3.outputLayer, updateCompositionState(false, true, ui::Transform::ROT_0));
     EXPECT_CALL(*layer3.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     injectOutputLayer(layer1);
     injectOutputLayer(layer2);
@@ -917,8 +908,7 @@
     InSequence seq;
     EXPECT_CALL(*layer0.outputLayer, updateCompositionState(true, false, ui::Transform::ROT_0));
     EXPECT_CALL(*layer1.outputLayer, updateCompositionState(true, false, ui::Transform::ROT_0));
-        EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-                .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer, updateCompositionState(true, false, ui::Transform::ROT_0));
     EXPECT_CALL(*layer3.outputLayer, updateCompositionState(true, false, ui::Transform::ROT_0));
 
@@ -926,9 +916,7 @@
     EXPECT_CALL(*layer0.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer0.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
-
+    EXPECT_CALL(*layer0.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     // After calling planComposition (which clears overrideInfo), this test sets
     // layer3 to be the peekThroughLayer for layer1 and layer2. As a result, it
@@ -938,18 +926,15 @@
                 writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ true, /*isPeekingThrough*/
                                 true));
-    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer1.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ true, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ true, /*skipLayer*/ true, z++,
                                 /*zIsOverridden*/ true, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     injectOutputLayer(layer0);
     injectOutputLayer(layer1);
@@ -1050,10 +1035,10 @@
         MOCK_METHOD1(
                 chooseCompositionStrategyAsync,
                 std::future<bool>(std::optional<android::HWComposer::DeviceRequestedChanges>*));
-        MOCK_METHOD4(composeSurfaces,
-                     std::optional<base::unique_fd>(
-                             const Region&, const compositionengine::CompositionRefreshArgs&,
-                             std::shared_ptr<renderengine::ExternalTexture>, base::unique_fd&));
+        MOCK_METHOD3(composeSurfaces,
+                     std::optional<base::unique_fd>(const Region&,
+                                                    std::shared_ptr<renderengine::ExternalTexture>,
+                                                    base::unique_fd&));
         MOCK_METHOD0(resetCompositionStrategy, void());
     };
 
@@ -1087,9 +1072,9 @@
     EXPECT_CALL(mOutput, chooseCompositionStrategyAsync(_))
             .WillOnce(DoAll(SetArgPointee<0>(mOutput.editState().previousDeviceRequestedChanges),
                             Return(ByMove(p.get_future()))));
-    EXPECT_CALL(mOutput, composeSurfaces(_, Ref(mRefreshArgs), _, _));
+    EXPECT_CALL(mOutput, composeSurfaces(_, _, _));
 
-    impl::GpuCompositionResult result = mOutput.prepareFrameAsync(mRefreshArgs);
+    impl::GpuCompositionResult result = mOutput.prepareFrameAsync();
     EXPECT_EQ(mOutput.getState().strategyPrediction, CompositionStrategyPredictionState::SUCCESS);
     EXPECT_FALSE(result.bufferAvailable());
 }
@@ -1112,7 +1097,7 @@
             .WillOnce(DoAll(SetArgPointee<0>(mOutput.editState().previousDeviceRequestedChanges),
                             Return(ByMove(p.get_future()))));
 
-    impl::GpuCompositionResult result = mOutput.prepareFrameAsync(mRefreshArgs);
+    impl::GpuCompositionResult result = mOutput.prepareFrameAsync();
     EXPECT_EQ(mOutput.getState().strategyPrediction, CompositionStrategyPredictionState::FAIL);
     EXPECT_FALSE(result.bufferAvailable());
 }
@@ -1140,9 +1125,9 @@
     EXPECT_CALL(mOutput, chooseCompositionStrategyAsync(_)).WillOnce([&] {
         return p.get_future();
     });
-    EXPECT_CALL(mOutput, composeSurfaces(_, Ref(mRefreshArgs), _, _));
+    EXPECT_CALL(mOutput, composeSurfaces(_, _, _));
 
-    impl::GpuCompositionResult result = mOutput.prepareFrameAsync(mRefreshArgs);
+    impl::GpuCompositionResult result = mOutput.prepareFrameAsync();
     EXPECT_EQ(mOutput.getState().strategyPrediction, CompositionStrategyPredictionState::FAIL);
     EXPECT_TRUE(result.bufferAvailable());
 }
@@ -1172,9 +1157,9 @@
     EXPECT_CALL(mOutput, chooseCompositionStrategyAsync(_)).WillOnce([&] {
         return p.get_future();
     });
-    EXPECT_CALL(mOutput, composeSurfaces(_, Ref(mRefreshArgs), _, _));
+    EXPECT_CALL(mOutput, composeSurfaces(_, _, _));
 
-    impl::GpuCompositionResult result = mOutput.prepareFrameAsync(mRefreshArgs);
+    impl::GpuCompositionResult result = mOutput.prepareFrameAsync();
     EXPECT_EQ(mOutput.getState().strategyPrediction, CompositionStrategyPredictionState::FAIL);
     EXPECT_TRUE(result.bufferAvailable());
 }
@@ -1192,14 +1177,49 @@
                           compositionengine::LayerFESet&));
     };
 
+    OutputPrepareTest() {
+        EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(2u));
+        EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0))
+                .WillRepeatedly(Return(&mLayer1.outputLayer));
+        EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(1))
+                .WillRepeatedly(Return(&mLayer2.outputLayer));
+
+        mRefreshArgs.layers.push_back(mLayer1.layerFE);
+        mRefreshArgs.layers.push_back(mLayer2.layerFE);
+    }
+
+    struct Layer {
+        StrictMock<mock::OutputLayer> outputLayer;
+        sp<StrictMock<mock::LayerFE>> layerFE = sp<StrictMock<mock::LayerFE>>::make();
+    };
+
     StrictMock<OutputPartialMock> mOutput;
     CompositionRefreshArgs mRefreshArgs;
     LayerFESet mGeomSnapshots;
+    Layer mLayer1;
+    Layer mLayer2;
 };
 
-TEST_F(OutputPrepareTest, justInvokesRebuildLayerStacks) {
+TEST_F(OutputPrepareTest, callsUncacheBuffersOnEachOutputLayerAndThenRebuildsLayerStacks) {
     InSequence seq;
+
+    mRefreshArgs.bufferIdsToUncache = {1, 3, 5};
+
     EXPECT_CALL(mOutput, rebuildLayerStacks(Ref(mRefreshArgs), Ref(mGeomSnapshots)));
+    EXPECT_CALL(mLayer1.outputLayer, uncacheBuffers(Ref(mRefreshArgs.bufferIdsToUncache)));
+    EXPECT_CALL(mLayer2.outputLayer, uncacheBuffers(Ref(mRefreshArgs.bufferIdsToUncache)));
+
+    mOutput.prepare(mRefreshArgs, mGeomSnapshots);
+}
+
+TEST_F(OutputPrepareTest, skipsUncacheBuffersIfEmptyAndThenRebuildsLayerStacks) {
+    InSequence seq;
+
+    mRefreshArgs.bufferIdsToUncache = {};
+
+    EXPECT_CALL(mOutput, rebuildLayerStacks(Ref(mRefreshArgs), Ref(mGeomSnapshots)));
+    EXPECT_CALL(mLayer1.outputLayer, uncacheBuffers(_)).Times(0);
+    EXPECT_CALL(mLayer2.outputLayer, uncacheBuffers(_)).Times(0);
 
     mOutput.prepare(mRefreshArgs, mGeomSnapshots);
 }
@@ -2000,11 +2020,9 @@
         MOCK_METHOD1(setColorTransform, void(const compositionengine::CompositionRefreshArgs&));
         MOCK_METHOD0(beginFrame, void());
         MOCK_METHOD0(prepareFrame, void());
-        MOCK_METHOD1(prepareFrameAsync, GpuCompositionResult(const CompositionRefreshArgs&));
+        MOCK_METHOD0(prepareFrameAsync, GpuCompositionResult());
         MOCK_METHOD1(devOptRepaintFlash, void(const compositionengine::CompositionRefreshArgs&));
-        MOCK_METHOD2(finishFrame,
-                     void(const compositionengine::CompositionRefreshArgs&,
-                          GpuCompositionResult&&));
+        MOCK_METHOD1(finishFrame, void(GpuCompositionResult&&));
         MOCK_METHOD0(postFramebuffer, void());
         MOCK_METHOD1(renderCachedSets, void(const compositionengine::CompositionRefreshArgs&));
         MOCK_METHOD1(canPredictCompositionStrategy, bool(const CompositionRefreshArgs&));
@@ -2026,7 +2044,7 @@
     EXPECT_CALL(mOutput, canPredictCompositionStrategy(Ref(args))).WillOnce(Return(false));
     EXPECT_CALL(mOutput, prepareFrame());
     EXPECT_CALL(mOutput, devOptRepaintFlash(Ref(args)));
-    EXPECT_CALL(mOutput, finishFrame(Ref(args), _));
+    EXPECT_CALL(mOutput, finishFrame(_));
     EXPECT_CALL(mOutput, postFramebuffer());
     EXPECT_CALL(mOutput, renderCachedSets(Ref(args)));
 
@@ -2044,9 +2062,9 @@
     EXPECT_CALL(mOutput, setColorTransform(Ref(args)));
     EXPECT_CALL(mOutput, beginFrame());
     EXPECT_CALL(mOutput, canPredictCompositionStrategy(Ref(args))).WillOnce(Return(true));
-    EXPECT_CALL(mOutput, prepareFrameAsync(Ref(args)));
+    EXPECT_CALL(mOutput, prepareFrameAsync());
     EXPECT_CALL(mOutput, devOptRepaintFlash(Ref(args)));
-    EXPECT_CALL(mOutput, finishFrame(Ref(args), _));
+    EXPECT_CALL(mOutput, finishFrame(_));
     EXPECT_CALL(mOutput, postFramebuffer());
     EXPECT_CALL(mOutput, renderCachedSets(Ref(args)));
 
@@ -2945,10 +2963,10 @@
         // Sets up the helper functions called by the function under test to use
         // mock implementations.
         MOCK_METHOD(Region, getDirtyRegion, (), (const));
-        MOCK_METHOD4(composeSurfaces,
-                     std::optional<base::unique_fd>(
-                             const Region&, const compositionengine::CompositionRefreshArgs&,
-                             std::shared_ptr<renderengine::ExternalTexture>, base::unique_fd&));
+        MOCK_METHOD3(composeSurfaces,
+                     std::optional<base::unique_fd>(const Region&,
+                                                    std::shared_ptr<renderengine::ExternalTexture>,
+                                                    base::unique_fd&));
         MOCK_METHOD0(postFramebuffer, void());
         MOCK_METHOD0(prepareFrame, void());
         MOCK_METHOD0(updateProtectedContentState, void());
@@ -3012,7 +3030,7 @@
     EXPECT_CALL(mOutput, getDirtyRegion()).WillOnce(Return(kNotEmptyRegion));
     EXPECT_CALL(mOutput, updateProtectedContentState());
     EXPECT_CALL(mOutput, dequeueRenderBuffer(_, _));
-    EXPECT_CALL(mOutput, composeSurfaces(RegionEq(kNotEmptyRegion), Ref(mRefreshArgs), _, _));
+    EXPECT_CALL(mOutput, composeSurfaces(RegionEq(kNotEmptyRegion), _, _));
     EXPECT_CALL(*mRenderSurface, queueBuffer(_));
     EXPECT_CALL(mOutput, postFramebuffer());
     EXPECT_CALL(mOutput, prepareFrame());
@@ -3028,10 +3046,10 @@
     struct OutputPartialMock : public OutputPartialMockBase {
         // Sets up the helper functions called by the function under test to use
         // mock implementations.
-        MOCK_METHOD4(composeSurfaces,
-                     std::optional<base::unique_fd>(
-                             const Region&, const compositionengine::CompositionRefreshArgs&,
-                             std::shared_ptr<renderengine::ExternalTexture>, base::unique_fd&));
+        MOCK_METHOD3(composeSurfaces,
+                     std::optional<base::unique_fd>(const Region&,
+                                                    std::shared_ptr<renderengine::ExternalTexture>,
+                                                    base::unique_fd&));
         MOCK_METHOD0(postFramebuffer, void());
         MOCK_METHOD0(updateProtectedContentState, void());
         MOCK_METHOD2(dequeueRenderBuffer,
@@ -3047,24 +3065,23 @@
     StrictMock<OutputPartialMock> mOutput;
     mock::DisplayColorProfile* mDisplayColorProfile = new StrictMock<mock::DisplayColorProfile>();
     mock::RenderSurface* mRenderSurface = new StrictMock<mock::RenderSurface>();
-    CompositionRefreshArgs mRefreshArgs;
 };
 
 TEST_F(OutputFinishFrameTest, ifNotEnabledDoesNothing) {
     mOutput.mState.isEnabled = false;
 
     impl::GpuCompositionResult result;
-    mOutput.finishFrame(mRefreshArgs, std::move(result));
+    mOutput.finishFrame(std::move(result));
 }
 
 TEST_F(OutputFinishFrameTest, takesEarlyOutifComposeSurfacesReturnsNoFence) {
     mOutput.mState.isEnabled = true;
     EXPECT_CALL(mOutput, updateProtectedContentState());
     EXPECT_CALL(mOutput, dequeueRenderBuffer(_, _)).WillOnce(Return(true));
-    EXPECT_CALL(mOutput, composeSurfaces(RegionEq(Region::INVALID_REGION), _, _, _));
+    EXPECT_CALL(mOutput, composeSurfaces(RegionEq(Region::INVALID_REGION), _, _));
 
     impl::GpuCompositionResult result;
-    mOutput.finishFrame(mRefreshArgs, std::move(result));
+    mOutput.finishFrame(std::move(result));
 }
 
 TEST_F(OutputFinishFrameTest, queuesBufferIfComposeSurfacesReturnsAFence) {
@@ -3073,12 +3090,12 @@
     InSequence seq;
     EXPECT_CALL(mOutput, updateProtectedContentState());
     EXPECT_CALL(mOutput, dequeueRenderBuffer(_, _)).WillOnce(Return(true));
-    EXPECT_CALL(mOutput, composeSurfaces(RegionEq(Region::INVALID_REGION), _, _, _))
+    EXPECT_CALL(mOutput, composeSurfaces(RegionEq(Region::INVALID_REGION), _, _))
             .WillOnce(Return(ByMove(base::unique_fd())));
     EXPECT_CALL(*mRenderSurface, queueBuffer(_));
 
     impl::GpuCompositionResult result;
-    mOutput.finishFrame(mRefreshArgs, std::move(result));
+    mOutput.finishFrame(std::move(result));
 }
 
 TEST_F(OutputFinishFrameTest, predictionSucceeded) {
@@ -3088,7 +3105,7 @@
     EXPECT_CALL(*mRenderSurface, queueBuffer(_));
 
     impl::GpuCompositionResult result;
-    mOutput.finishFrame(mRefreshArgs, std::move(result));
+    mOutput.finishFrame(std::move(result));
 }
 
 TEST_F(OutputFinishFrameTest, predictionFailedAndBufferIsReused) {
@@ -3104,11 +3121,11 @@
                                                                       2);
 
     EXPECT_CALL(mOutput,
-                composeSurfaces(RegionEq(Region::INVALID_REGION), _, result.buffer,
+                composeSurfaces(RegionEq(Region::INVALID_REGION), result.buffer,
                                 Eq(ByRef(result.fence))))
             .WillOnce(Return(ByMove(base::unique_fd())));
     EXPECT_CALL(*mRenderSurface, queueBuffer(_));
-    mOutput.finishFrame(mRefreshArgs, std::move(result));
+    mOutput.finishFrame(std::move(result));
 }
 
 /*
@@ -3299,7 +3316,8 @@
         // mock implementations.
         MOCK_CONST_METHOD0(getSkipColorTransform, bool());
         MOCK_METHOD3(generateClientCompositionRequests,
-                     std::vector<LayerFE::LayerSettings>(bool, ui::Dataspace, std::vector<LayerFE*>&));
+                     std::vector<LayerFE::LayerSettings>(bool, ui::Dataspace,
+                                                         std::vector<LayerFE*>&));
         MOCK_METHOD2(appendRegionFlashRequests,
                      void(const Region&, std::vector<LayerFE::LayerSettings>&));
         MOCK_METHOD1(setExpensiveRenderingExpected, void(bool));
@@ -3345,8 +3363,8 @@
                     getInstance()->mOutput.dequeueRenderBuffer(&fence, &externalTexture);
             if (success) {
                 getInstance()->mReadyFence =
-                        getInstance()->mOutput.composeSurfaces(kDebugRegion, kDefaultRefreshArgs,
-                                                               externalTexture, fence);
+                        getInstance()->mOutput.composeSurfaces(kDebugRegion, externalTexture,
+                                                               fence);
             }
             return nextState<FenceCheckState>();
         }
@@ -4020,7 +4038,7 @@
     std::shared_ptr<renderengine::ExternalTexture> tex;
     mOutput.updateProtectedContentState();
     mOutput.dequeueRenderBuffer(&fd, &tex);
-    mOutput.composeSurfaces(kDebugRegion, kDefaultRefreshArgs, tex, fd);
+    mOutput.composeSurfaces(kDebugRegion, tex, fd);
 }
 
 TEST_F(OutputComposeSurfacesTest_HandlesProtectedContent, ifNotEnabled) {
@@ -4042,7 +4060,7 @@
     std::shared_ptr<renderengine::ExternalTexture> tex;
     mOutput.updateProtectedContentState();
     mOutput.dequeueRenderBuffer(&fd, &tex);
-    mOutput.composeSurfaces(kDebugRegion, kDefaultRefreshArgs, tex, fd);
+    mOutput.composeSurfaces(kDebugRegion, tex, fd);
 }
 
 TEST_F(OutputComposeSurfacesTest_HandlesProtectedContent, ifAlreadyEnabledEverywhere) {
@@ -4055,7 +4073,7 @@
     std::shared_ptr<renderengine::ExternalTexture> tex;
     mOutput.updateProtectedContentState();
     mOutput.dequeueRenderBuffer(&fd, &tex);
-    mOutput.composeSurfaces(kDebugRegion, kDefaultRefreshArgs, tex, fd);
+    mOutput.composeSurfaces(kDebugRegion, tex, fd);
 }
 
 TEST_F(OutputComposeSurfacesTest_HandlesProtectedContent, ifAlreadyEnabledInRenderSurface) {
@@ -4068,7 +4086,7 @@
     std::shared_ptr<renderengine::ExternalTexture> tex;
     mOutput.updateProtectedContentState();
     mOutput.dequeueRenderBuffer(&fd, &tex);
-    mOutput.composeSurfaces(kDebugRegion, kDefaultRefreshArgs, tex, fd);
+    mOutput.composeSurfaces(kDebugRegion, tex, fd);
 }
 
 struct OutputComposeSurfacesTest_SetsExpensiveRendering : public OutputComposeSurfacesTest {
@@ -4101,61 +4119,7 @@
     std::shared_ptr<renderengine::ExternalTexture> tex;
     mOutput.updateProtectedContentState();
     mOutput.dequeueRenderBuffer(&fd, &tex);
-    mOutput.composeSurfaces(kDebugRegion, kDefaultRefreshArgs, tex, fd);
-}
-
-struct OutputComposeSurfacesTest_SetsExpensiveRendering_ForBlur
-      : public OutputComposeSurfacesTest_SetsExpensiveRendering {
-    OutputComposeSurfacesTest_SetsExpensiveRendering_ForBlur() {
-        mLayer.layerFEState.backgroundBlurRadius = 10;
-        mLayer.layerFEState.isOpaque = false;
-        mOutput.editState().isEnabled = true;
-
-        EXPECT_CALL(mLayer.outputLayer, updateCompositionState(false, true, ui::Transform::ROT_0));
-        EXPECT_CALL(mLayer.outputLayer,
-                    writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
-                                    /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-        EXPECT_CALL(mOutput, generateClientCompositionRequests(_, kDefaultOutputDataspace, _))
-                .WillOnce(Return(std::vector<LayerFE::LayerSettings>{}));
-        EXPECT_CALL(mRenderEngine, drawLayers(_, _, _, false, _))
-                .WillOnce(Return(ByMove(ftl::yield<FenceResult>(Fence::NO_FENCE))));
-        EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(1u));
-        EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u))
-                .WillRepeatedly(Return(&mLayer.outputLayer));
-    }
-
-    NonInjectedLayer mLayer;
-    compositionengine::CompositionRefreshArgs mRefreshArgs;
-};
-
-TEST_F(OutputComposeSurfacesTest_SetsExpensiveRendering_ForBlur, IfBlursAreExpensive) {
-    mRefreshArgs.blursAreExpensive = true;
-    mOutput.updateCompositionState(mRefreshArgs);
-    mOutput.planComposition();
-    mOutput.writeCompositionState(mRefreshArgs);
-
-    EXPECT_CALL(mOutput, setExpensiveRenderingExpected(true));
-
-    base::unique_fd fd;
-    std::shared_ptr<renderengine::ExternalTexture> tex;
-    mOutput.updateProtectedContentState();
-    mOutput.dequeueRenderBuffer(&fd, &tex);
-    mOutput.composeSurfaces(kDebugRegion, mRefreshArgs, tex, fd);
-}
-
-TEST_F(OutputComposeSurfacesTest_SetsExpensiveRendering_ForBlur, IfBlursAreNotExpensive) {
-    mRefreshArgs.blursAreExpensive = false;
-    mOutput.updateCompositionState(mRefreshArgs);
-    mOutput.planComposition();
-    mOutput.writeCompositionState(mRefreshArgs);
-
-    EXPECT_CALL(mOutput, setExpensiveRenderingExpected(true)).Times(0);
-
-    base::unique_fd fd;
-    std::shared_ptr<renderengine::ExternalTexture> tex;
-    mOutput.updateProtectedContentState();
-    mOutput.dequeueRenderBuffer(&fd, &tex);
-    mOutput.composeSurfaces(kDebugRegion, mRefreshArgs, tex, fd);
+    mOutput.composeSurfaces(kDebugRegion, tex, fd);
 }
 
 /*
@@ -4166,7 +4130,7 @@
     struct OutputPartialMock : public OutputPartialMockBase {
         // compositionengine::Output overrides
         std::vector<LayerFE::LayerSettings> generateClientCompositionRequestsHelper(
-            bool supportsProtectedContent, ui::Dataspace dataspace) {
+                bool supportsProtectedContent, ui::Dataspace dataspace) {
             std::vector<LayerFE*> ignore;
             return impl::Output::generateClientCompositionRequests(supportsProtectedContent,
                                                                    dataspace, ignore);
@@ -4258,8 +4222,9 @@
     EXPECT_CALL(mLayers[1].mOutputLayer, requiresClientComposition()).WillOnce(Return(false));
     EXPECT_CALL(mLayers[2].mOutputLayer, requiresClientComposition()).WillOnce(Return(false));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     EXPECT_EQ(0u, requests.size());
 }
 
@@ -4268,8 +4233,9 @@
     mLayers[1].mOutputLayerState.visibleRegion = Region(Rect(4000, 0, 4010, 10));
     mLayers[2].mOutputLayerState.visibleRegion = Region(Rect(-10, -10, 0, 0));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     EXPECT_EQ(0u, requests.size());
 }
 
@@ -4281,8 +4247,9 @@
     EXPECT_CALL(*mLayers[2].mLayerFE, prepareClientComposition(_))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(mLayers[2].mLayerSettings)));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     ASSERT_EQ(2u, requests.size());
     EXPECT_EQ(mLayers[1].mLayerSettings, requests[0]);
     EXPECT_EQ(mLayers[2].mLayerSettings, requests[1]);
@@ -4312,8 +4279,9 @@
                 prepareClientComposition(ClientCompositionTargetSettingsBlurSettingsEq(
                         LayerFE::ClientCompositionTargetSettings::BlurSetting::BlurRegionsOnly)))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(mLayers[2].mLayerSettings)));
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     ASSERT_EQ(2u, requests.size());
     EXPECT_EQ(mLayers[1].mLayerSettings, requests[0]);
     EXPECT_EQ(mLayers[2].mLayerSettings, requests[1]);
@@ -4341,8 +4309,9 @@
     EXPECT_CALL(*mLayers[2].mLayerFE, prepareClientComposition(_))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(mLayers[2].mLayerSettings)));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     ASSERT_EQ(1u, requests.size());
     EXPECT_EQ(mLayers[2].mLayerSettings, requests[0]);
 }
@@ -4364,8 +4333,9 @@
     EXPECT_CALL(*mLayers[2].mLayerFE, prepareClientComposition(_))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(mLayers[2].mLayerSettings)));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     ASSERT_EQ(1u, requests.size());
     EXPECT_EQ(mLayers[2].mLayerSettings, requests[0]);
 }
@@ -4427,8 +4397,9 @@
     EXPECT_CALL(*mLayers[2].mLayerFE, prepareClientComposition(Eq(ByRef(layer2TargetSettings))))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(mLayers[2].mLayerSettings)));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     ASSERT_EQ(2u, requests.size());
 
     // The second layer is expected to be rendered as alpha=0 black with no blending
@@ -4492,7 +4463,7 @@
 
     static_cast<void>(
             mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                      kDisplayDataspace));
+                                                            kDisplayDataspace));
 }
 
 TEST_F(GenerateClientCompositionRequestsTest_ThreeLayers,
@@ -4714,8 +4685,9 @@
     EXPECT_CALL(*mLayers[2].mLayerFE, prepareClientComposition(Eq(ByRef(layer2TargetSettings))))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>()));
 
-    static_cast<void>(mOutput.generateClientCompositionRequestsHelper(true /* supportsProtectedContent */,
-                                                                kDisplayDataspace));
+    static_cast<void>(
+            mOutput.generateClientCompositionRequestsHelper(true /* supportsProtectedContent */,
+                                                            kDisplayDataspace));
 }
 
 TEST_F(OutputUpdateAndWriteCompositionStateTest, noBackgroundBlurWhenOpaque) {
@@ -4728,14 +4700,12 @@
     EXPECT_CALL(*layer1.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer, updateCompositionState(false, false, ui::Transform::ROT_0));
     EXPECT_CALL(*layer2.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     layer2.layerFEState.backgroundBlurRadius = 10;
     layer2.layerFEState.isOpaque = true;
@@ -4764,20 +4734,17 @@
     EXPECT_CALL(*layer1.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer, updateCompositionState(false, true, ui::Transform::ROT_0));
     EXPECT_CALL(*layer2.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer3.outputLayer, updateCompositionState(false, false, ui::Transform::ROT_0));
     EXPECT_CALL(*layer3.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     layer2.layerFEState.backgroundBlurRadius = 10;
     layer2.layerFEState.isOpaque = false;
@@ -4807,20 +4774,17 @@
     EXPECT_CALL(*layer1.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer1.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer2.outputLayer, updateCompositionState(false, true, ui::Transform::ROT_0));
     EXPECT_CALL(*layer2.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer2.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(*layer3.outputLayer, updateCompositionState(false, false, ui::Transform::ROT_0));
     EXPECT_CALL(*layer3.outputLayer,
                 writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, z++,
                                 /*zIsOverridden*/ false, /*isPeekingThrough*/ false));
-    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition())
-            .WillRepeatedly(Return(false));
+    EXPECT_CALL(*layer3.outputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
 
     BlurRegion region;
     layer2.layerFEState.blurRegions.push_back(region);
@@ -4917,8 +4881,8 @@
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(rightLayer.mLayerSettings)));
 
     constexpr bool supportsProtectedContent = true;
-    auto requests =
-        mOutput.generateClientCompositionRequestsHelper(supportsProtectedContent, kOutputDataspace);
+    auto requests = mOutput.generateClientCompositionRequestsHelper(supportsProtectedContent,
+                                                                    kOutputDataspace);
     ASSERT_EQ(2u, requests.size());
     EXPECT_EQ(leftLayer.mLayerSettings, requests[0]);
     EXPECT_EQ(rightLayer.mLayerSettings, requests[1]);
@@ -4956,8 +4920,9 @@
     EXPECT_CALL(*mLayers[2].mLayerFE, prepareClientComposition(Eq(ByRef(layer2Settings))))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(mShadowSettings)));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     ASSERT_EQ(1u, requests.size());
 
     EXPECT_EQ(mShadowSettings, requests[0]);
@@ -4993,8 +4958,9 @@
     EXPECT_CALL(*mLayers[2].mLayerFE, prepareClientComposition(Eq(ByRef(layer2Settings))))
             .WillOnce(Return(std::optional<LayerFE::LayerSettings>(mLayers[2].mLayerSettings)));
 
-    auto requests = mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
-                                                              kDisplayDataspace);
+    auto requests =
+            mOutput.generateClientCompositionRequestsHelper(false /* supportsProtectedContent */,
+                                                            kDisplayDataspace);
     ASSERT_EQ(1u, requests.size());
 
     EXPECT_EQ(mLayers[2].mLayerSettings, requests[0]);
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 46b857b..96ae77f 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -452,7 +452,8 @@
     }
 }
 
-auto DisplayDevice::setDesiredActiveMode(const ActiveModeInfo& info) -> DesiredActiveModeAction {
+auto DisplayDevice::setDesiredActiveMode(const ActiveModeInfo& info, bool force)
+        -> DesiredActiveModeAction {
     ATRACE_CALL();
 
     LOG_ALWAYS_FATAL_IF(!info.modeOpt, "desired mode not provided");
@@ -473,7 +474,7 @@
     const auto& desiredMode = *info.modeOpt->modePtr;
 
     // Check if we are already at the desired mode
-    if (refreshRateSelector().getActiveMode().modePtr->getId() == desiredMode.getId()) {
+    if (!force && refreshRateSelector().getActiveMode().modePtr->getId() == desiredMode.getId()) {
         if (refreshRateSelector().getActiveMode() == info.modeOpt) {
             return DesiredActiveModeAction::None;
         }
diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index 8f9b2a1..d757673 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -210,7 +210,8 @@
         InitiateDisplayModeSwitch,
         InitiateRenderRateSwitch
     };
-    DesiredActiveModeAction setDesiredActiveMode(const ActiveModeInfo&) EXCLUDES(mActiveModeLock);
+    DesiredActiveModeAction setDesiredActiveMode(const ActiveModeInfo&, bool force = false)
+            EXCLUDES(mActiveModeLock);
     std::optional<ActiveModeInfo> getDesiredActiveMode() const EXCLUDES(mActiveModeLock);
     void clearDesiredActiveModeState() EXCLUDES(mActiveModeLock);
     ActiveModeInfo getUpcomingActiveMode() const REQUIRES(kMainThreadContext) {
diff --git a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
index 800e36d..e372b72 100644
--- a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
@@ -23,6 +23,7 @@
 #include <android-base/file.h>
 #include <android/binder_ibinder_platform.h>
 #include <android/binder_manager.h>
+#include <gui/TraceUtils.h>
 #include <log/log.h>
 #include <utils/Trace.h>
 
@@ -232,6 +233,25 @@
 
     addReader(translate<Display>(kSingleReaderKey));
 
+    // If unable to read interface version, then become backwards compatible.
+    int32_t version = 1;
+    const auto status = mAidlComposerClient->getInterfaceVersion(&version);
+    if (!status.isOk()) {
+        ALOGE("getInterfaceVersion for AidlComposer constructor failed %s",
+              status.getDescription().c_str());
+    }
+    if (version == 1) {
+        mClearSlotBuffer = sp<GraphicBuffer>::make(1, 1, PIXEL_FORMAT_RGBX_8888,
+                                                   GraphicBuffer::USAGE_HW_COMPOSER |
+                                                           GraphicBuffer::USAGE_SW_READ_OFTEN |
+                                                           GraphicBuffer::USAGE_SW_WRITE_OFTEN,
+                                                   "AidlComposer");
+        if (!mClearSlotBuffer || mClearSlotBuffer->initCheck() != ::android::OK) {
+            LOG_ALWAYS_FATAL("Failed to allocate a buffer for clearing layer buffer slots");
+            return;
+        }
+    }
+
     ALOGI("Loaded AIDL composer3 HAL service");
 }
 
@@ -578,13 +598,15 @@
 }
 
 Error AidlComposer::presentDisplay(Display display, int* outPresentFence) {
-    ATRACE_NAME("HwcPresentDisplay");
+    const auto displayId = translate<int64_t>(display);
+    ATRACE_FORMAT("HwcPresentDisplay %" PRId64, displayId);
+
     Error error = Error::NONE;
     mMutex.lock_shared();
     auto writer = getWriter(display);
     auto reader = getReader(display);
     if (writer && reader) {
-        writer->get().presentDisplay(translate<int64_t>(display));
+        writer->get().presentDisplay(displayId);
         error = execute(display);
     } else {
         error = Error::BAD_DISPLAY;
@@ -595,7 +617,7 @@
         return error;
     }
 
-    auto fence = reader->get().takePresentFence(translate<int64_t>(display));
+    auto fence = reader->get().takePresentFence(displayId);
     mMutex.unlock_shared();
     // take ownership
     *outPresentFence = fence.get();
@@ -707,8 +729,9 @@
 
 Error AidlComposer::validateDisplay(Display display, nsecs_t expectedPresentTime,
                                     uint32_t* outNumTypes, uint32_t* outNumRequests) {
-    ATRACE_NAME("HwcValidateDisplay");
     const auto displayId = translate<int64_t>(display);
+    ATRACE_FORMAT("HwcValidateDisplay %" PRId64, displayId);
+
     Error error = Error::NONE;
     mMutex.lock_shared();
     auto writer = getWriter(display);
@@ -734,8 +757,9 @@
 Error AidlComposer::presentOrValidateDisplay(Display display, nsecs_t expectedPresentTime,
                                              uint32_t* outNumTypes, uint32_t* outNumRequests,
                                              int* outPresentFence, uint32_t* state) {
-    ATRACE_NAME("HwcPresentOrValidateDisplay");
     const auto displayId = translate<int64_t>(display);
+    ATRACE_FORMAT("HwcPresentOrValidateDisplay %" PRId64, displayId);
+
     Error error = Error::NONE;
     mMutex.lock_shared();
     auto writer = getWriter(display);
@@ -809,6 +833,49 @@
     return error;
 }
 
+Error AidlComposer::setLayerBufferSlotsToClear(Display display, Layer layer,
+                                               const std::vector<uint32_t>& slotsToClear,
+                                               uint32_t activeBufferSlot) {
+    if (slotsToClear.empty()) {
+        return Error::NONE;
+    }
+
+    Error error = Error::NONE;
+    mMutex.lock_shared();
+    if (auto writer = getWriter(display)) {
+        // Backwards compatible way of clearing buffer is to set the layer buffer with a placeholder
+        // buffer, using the slot that needs to cleared... tricky.
+        if (mClearSlotBuffer == nullptr) {
+            writer->get().setLayerBufferSlotsToClear(translate<int64_t>(display),
+                                                     translate<int64_t>(layer), slotsToClear);
+        } else {
+            for (uint32_t slot : slotsToClear) {
+                // Don't clear the active buffer slot because we need to restore the active buffer
+                // after clearing the requested buffer slots with a placeholder buffer.
+                if (slot != activeBufferSlot) {
+                    writer->get().setLayerBufferWithNewCommand(translate<int64_t>(display),
+                                                               translate<int64_t>(layer), slot,
+                                                               mClearSlotBuffer->handle,
+                                                               /*fence*/ -1);
+                }
+            }
+            // Since we clear buffers by setting them to a placeholder buffer, we want to make
+            // sure that the last setLayerBuffer command is sent with the currently active
+            // buffer, not the placeholder buffer, so that there is no perceptual change when
+            // buffers are discarded.
+            writer->get().setLayerBufferWithNewCommand(translate<int64_t>(display),
+                                                       translate<int64_t>(layer), activeBufferSlot,
+                                                       // The active buffer is still cached in
+                                                       // its slot and doesn't need a fence.
+                                                       /*buffer*/ nullptr, /*fence*/ -1);
+        }
+    } else {
+        error = Error::BAD_DISPLAY;
+    }
+    mMutex.unlock_shared();
+    return error;
+}
+
 Error AidlComposer::setLayerSurfaceDamage(Display display, Layer layer,
                                           const std::vector<IComposerClient::Rect>& damage) {
     Error error = Error::NONE;
diff --git a/services/surfaceflinger/DisplayHardware/AidlComposerHal.h b/services/surfaceflinger/DisplayHardware/AidlComposerHal.h
index 2a043fd..9a7ade7 100644
--- a/services/surfaceflinger/DisplayHardware/AidlComposerHal.h
+++ b/services/surfaceflinger/DisplayHardware/AidlComposerHal.h
@@ -143,6 +143,9 @@
     /* see setClientTarget for the purpose of slot */
     Error setLayerBuffer(Display display, Layer layer, uint32_t slot,
                          const sp<GraphicBuffer>& buffer, int acquireFence) override;
+    Error setLayerBufferSlotsToClear(Display display, Layer layer,
+                                     const std::vector<uint32_t>& slotsToClear,
+                                     uint32_t activeBufferSlot) override;
     Error setLayerSurfaceDamage(Display display, Layer layer,
                                 const std::vector<IComposerClient::Rect>& damage) override;
     Error setLayerBlendMode(Display display, Layer layer, IComposerClient::BlendMode mode) override;
@@ -280,6 +283,9 @@
     // threading annotations.
     ftl::SharedMutex mMutex;
 
+    // Buffer slots for layers are cleared by setting the slot buffer to this buffer.
+    sp<GraphicBuffer> mClearSlotBuffer;
+
     // Aidl interface
     using AidlIComposer = aidl::android::hardware::graphics::composer3::IComposer;
     using AidlIComposerClient = aidl::android::hardware::graphics::composer3::IComposerClient;
diff --git a/services/surfaceflinger/DisplayHardware/ComposerHal.h b/services/surfaceflinger/DisplayHardware/ComposerHal.h
index ec23935..1c2b8b5 100644
--- a/services/surfaceflinger/DisplayHardware/ComposerHal.h
+++ b/services/surfaceflinger/DisplayHardware/ComposerHal.h
@@ -179,6 +179,9 @@
     /* see setClientTarget for the purpose of slot */
     virtual Error setLayerBuffer(Display display, Layer layer, uint32_t slot,
                                  const sp<GraphicBuffer>& buffer, int acquireFence) = 0;
+    virtual Error setLayerBufferSlotsToClear(Display display, Layer layer,
+                                             const std::vector<uint32_t>& slotsToClear,
+                                             uint32_t activeBufferSlot) = 0;
     virtual Error setLayerSurfaceDamage(Display display, Layer layer,
                                         const std::vector<IComposerClient::Rect>& damage) = 0;
     virtual Error setLayerBlendMode(Display display, Layer layer,
diff --git a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
index eb14933..ce602a8 100644
--- a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
@@ -72,6 +72,10 @@
     mConsumer->setDefaultBufferSize(limitedSize.width, limitedSize.height);
     mConsumer->setMaxAcquiredBufferCount(
             SurfaceFlinger::maxFrameBufferAcquiredBuffers - 1);
+
+    for (size_t i = 0; i < sizeof(mHwcBufferIds) / sizeof(mHwcBufferIds[0]); ++i) {
+        mHwcBufferIds[i] = UINT64_MAX;
+    }
 }
 
 void FramebufferSurface::resizeBuffers(const ui::Size& newSize) {
@@ -88,31 +92,16 @@
 }
 
 status_t FramebufferSurface::advanceFrame() {
-    uint32_t slot = 0;
-    sp<GraphicBuffer> buf;
-    sp<Fence> acquireFence(Fence::NO_FENCE);
-    Dataspace dataspace = Dataspace::UNKNOWN;
-    status_t result = nextBuffer(slot, buf, acquireFence, dataspace);
-    mDataSpace = dataspace;
-    if (result != NO_ERROR) {
-        ALOGE("error latching next FramebufferSurface buffer: %s (%d)",
-                strerror(-result), result);
-    }
-    return result;
-}
-
-status_t FramebufferSurface::nextBuffer(uint32_t& outSlot,
-        sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence,
-        Dataspace& outDataspace) {
     Mutex::Autolock lock(mMutex);
 
     BufferItem item;
     status_t err = acquireBufferLocked(&item, 0);
     if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
-        mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, &outSlot, &outBuffer);
+        mDataspace = Dataspace::UNKNOWN;
         return NO_ERROR;
     } else if (err != NO_ERROR) {
         ALOGE("error acquiring buffer: %s (%d)", strerror(-err), err);
+        mDataspace = Dataspace::UNKNOWN;
         return err;
     }
 
@@ -133,13 +122,18 @@
     mCurrentBufferSlot = item.mSlot;
     mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer;
     mCurrentFence = item.mFence;
+    mDataspace = static_cast<Dataspace>(item.mDataSpace);
 
-    outFence = item.mFence;
-    mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, &outSlot, &outBuffer);
-    outDataspace = static_cast<Dataspace>(item.mDataSpace);
-    status_t result = mHwc.setClientTarget(mDisplayId, outSlot, outFence, outBuffer, outDataspace);
+    // assume HWC has previously seen the buffer in this slot
+    sp<GraphicBuffer> hwcBuffer = sp<GraphicBuffer>(nullptr);
+    if (mCurrentBuffer->getId() != mHwcBufferIds[mCurrentBufferSlot]) {
+        mHwcBufferIds[mCurrentBufferSlot] = mCurrentBuffer->getId();
+        hwcBuffer = mCurrentBuffer; // HWC hasn't previously seen this buffer in this slot
+    }
+    status_t result = mHwc.setClientTarget(mDisplayId, mCurrentBufferSlot, mCurrentFence, hwcBuffer,
+                                           mDataspace);
     if (result != NO_ERROR) {
-        ALOGE("error posting framebuffer: %d", result);
+        ALOGE("error posting framebuffer: %s (%d)", strerror(-result), result);
         return result;
     }
 
@@ -190,7 +184,7 @@
         limitedSize.width = maxSize.height * aspectRatio;
         wasLimited = true;
     }
-    ALOGI_IF(wasLimited, "framebuffer size has been limited to [%dx%d] from [%dx%d]",
+    ALOGI_IF(wasLimited, "Framebuffer size has been limited to [%dx%d] from [%dx%d]",
              limitedSize.width, limitedSize.height, size.width, size.height);
     return limitedSize;
 }
@@ -198,9 +192,9 @@
 void FramebufferSurface::dumpAsString(String8& result) const {
     Mutex::Autolock lock(mMutex);
     result.append("   FramebufferSurface\n");
-    result.appendFormat("      mDataSpace=%s (%d)\n",
-                        dataspaceDetails(static_cast<android_dataspace>(mDataSpace)).c_str(),
-                        mDataSpace);
+    result.appendFormat("      mDataspace=%s (%d)\n",
+                        dataspaceDetails(static_cast<android_dataspace>(mDataspace)).c_str(),
+                        mDataspace);
     ConsumerBase::dumpLocked(result, "      ");
 }
 
diff --git a/services/surfaceflinger/DisplayHardware/FramebufferSurface.h b/services/surfaceflinger/DisplayHardware/FramebufferSurface.h
index d41a856..0b863da 100644
--- a/services/surfaceflinger/DisplayHardware/FramebufferSurface.h
+++ b/services/surfaceflinger/DisplayHardware/FramebufferSurface.h
@@ -21,7 +21,7 @@
 #include <sys/types.h>
 
 #include <compositionengine/DisplaySurface.h>
-#include <compositionengine/impl/HwcBufferCache.h>
+#include <gui/BufferQueue.h>
 #include <gui/ConsumerBase.h>
 #include <ui/DisplayId.h>
 #include <ui/Size.h>
@@ -69,12 +69,6 @@
 
     virtual void dumpLocked(String8& result, const char* prefix) const;
 
-    // nextBuffer waits for and then latches the next buffer from the
-    // BufferQueue and releases the previously latched buffer to the
-    // BufferQueue.  The new buffer is returned in the 'buffer' argument.
-    status_t nextBuffer(uint32_t& outSlot, sp<GraphicBuffer>& outBuffer,
-            sp<Fence>& outFence, ui::Dataspace& outDataspace);
-
     const PhysicalDisplayId mDisplayId;
 
     // Framebuffer size has a dimension limitation in pixels based on the graphics capabilities of
@@ -91,7 +85,7 @@
     // compositing. Otherwise it will display the dataspace of the buffer
     // use for compositing which can change as wide-color content is
     // on/off.
-    ui::Dataspace mDataSpace;
+    ui::Dataspace mDataspace;
 
     // mCurrentBuffer is the current buffer or nullptr to indicate that there is
     // no current buffer.
@@ -103,7 +97,9 @@
     // Hardware composer, owned by SurfaceFlinger.
     HWComposer& mHwc;
 
-    compositionengine::impl::HwcBufferCache mHwcBufferCache;
+    // Buffers that HWC has seen before, indexed by slot number.
+    // NOTE: The BufferQueue slot number is the same as the HWC slot number.
+    uint64_t mHwcBufferIds[BufferQueue::NUM_BUFFER_SLOTS];
 
     // Previous buffer to release after getting an updated retire fence
     bool mHasPendingRelease;
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index d0126d0..6738f00 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -717,6 +717,16 @@
     return static_cast<Error>(intError);
 }
 
+Error Layer::setBufferSlotsToClear(const std::vector<uint32_t>& slotsToClear,
+                                   uint32_t activeBufferSlot) {
+    if (CC_UNLIKELY(!mDisplay)) {
+        return Error::BAD_DISPLAY;
+    }
+    auto intError = mComposer.setLayerBufferSlotsToClear(mDisplay->getId(), mId, slotsToClear,
+                                                         activeBufferSlot);
+    return static_cast<Error>(intError);
+}
+
 Error Layer::setSurfaceDamage(const Region& damage)
 {
     if (CC_UNLIKELY(!mDisplay)) {
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 4971d19..c1c7070 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -310,6 +310,8 @@
     [[nodiscard]] virtual hal::Error setBuffer(uint32_t slot,
                                                const android::sp<android::GraphicBuffer>& buffer,
                                                const android::sp<android::Fence>& acquireFence) = 0;
+    [[nodiscard]] virtual hal::Error setBufferSlotsToClear(
+            const std::vector<uint32_t>& slotsToClear, uint32_t activeBufferSlot) = 0;
     [[nodiscard]] virtual hal::Error setSurfaceDamage(const android::Region& damage) = 0;
 
     [[nodiscard]] virtual hal::Error setBlendMode(hal::BlendMode mode) = 0;
@@ -360,6 +362,8 @@
     hal::Error setCursorPosition(int32_t x, int32_t y) override;
     hal::Error setBuffer(uint32_t slot, const android::sp<android::GraphicBuffer>& buffer,
                          const android::sp<android::Fence>& acquireFence) override;
+    hal::Error setBufferSlotsToClear(const std::vector<uint32_t>& slotsToClear,
+                                     uint32_t activeBufferSlot) override;
     hal::Error setSurfaceDamage(const android::Region& damage) override;
 
     hal::Error setBlendMode(hal::BlendMode mode) override;
diff --git a/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp b/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
index b607df0..c9e1e79 100644
--- a/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
@@ -186,9 +186,22 @@
     return out;
 }
 
+sp<GraphicBuffer> allocateClearSlotBuffer() {
+    sp<GraphicBuffer> buffer = sp<GraphicBuffer>::make(1, 1, PIXEL_FORMAT_RGBX_8888,
+                                                       GraphicBuffer::USAGE_HW_COMPOSER |
+                                                               GraphicBuffer::USAGE_SW_READ_OFTEN |
+                                                               GraphicBuffer::USAGE_SW_WRITE_OFTEN,
+                                                       "HidlComposer");
+    if (!buffer || buffer->initCheck() != ::android::OK) {
+        return nullptr;
+    }
+    return std::move(buffer);
+}
+
 } // anonymous namespace
 
-HidlComposer::HidlComposer(const std::string& serviceName) : mWriter(kWriterInitialSize) {
+HidlComposer::HidlComposer(const std::string& serviceName)
+      : mClearSlotBuffer(allocateClearSlotBuffer()), mWriter(kWriterInitialSize) {
     mComposer = V2_1::IComposer::getService(serviceName);
 
     if (mComposer == nullptr) {
@@ -230,6 +243,11 @@
     if (mClient == nullptr) {
         LOG_ALWAYS_FATAL("failed to create composer client");
     }
+
+    if (!mClearSlotBuffer) {
+        LOG_ALWAYS_FATAL("Failed to allocate a buffer for clearing layer buffer slots");
+        return;
+    }
 }
 
 bool HidlComposer::isSupported(OptionalFeature feature) const {
@@ -694,6 +712,32 @@
     return Error::NONE;
 }
 
+Error HidlComposer::setLayerBufferSlotsToClear(Display display, Layer layer,
+                                               const std::vector<uint32_t>& slotsToClear,
+                                               uint32_t activeBufferSlot) {
+    if (slotsToClear.empty()) {
+        return Error::NONE;
+    }
+    // Backwards compatible way of clearing buffer is to set the layer buffer with a placeholder
+    // buffer, using the slot that needs to cleared... tricky.
+    for (uint32_t slot : slotsToClear) {
+        // Don't clear the active buffer slot because we need to restore the active buffer after
+        // setting the requested buffer slots with a placeholder buffer.
+        if (slot != activeBufferSlot) {
+            mWriter.selectDisplay(display);
+            mWriter.selectLayer(layer);
+            mWriter.setLayerBuffer(slot, mClearSlotBuffer->handle, /*fence*/ -1);
+        }
+    }
+    // Since we clear buffers by setting them to a placeholder buffer, we want to make sure that the
+    // last setLayerBuffer command is sent with the currently active buffer, not the placeholder
+    // buffer, so that there is no perceptual change.
+    mWriter.selectDisplay(display);
+    mWriter.selectLayer(layer);
+    mWriter.setLayerBuffer(activeBufferSlot, /*buffer*/ nullptr, /*fence*/ -1);
+    return Error::NONE;
+}
+
 Error HidlComposer::setLayerSurfaceDamage(Display display, Layer layer,
                                           const std::vector<IComposerClient::Rect>& damage) {
     mWriter.selectDisplay(display);
diff --git a/services/surfaceflinger/DisplayHardware/HidlComposerHal.h b/services/surfaceflinger/DisplayHardware/HidlComposerHal.h
index 3602bbb..921add5 100644
--- a/services/surfaceflinger/DisplayHardware/HidlComposerHal.h
+++ b/services/surfaceflinger/DisplayHardware/HidlComposerHal.h
@@ -248,6 +248,9 @@
     /* see setClientTarget for the purpose of slot */
     Error setLayerBuffer(Display display, Layer layer, uint32_t slot,
                          const sp<GraphicBuffer>& buffer, int acquireFence) override;
+    Error setLayerBufferSlotsToClear(Display display, Layer layer,
+                                     const std::vector<uint32_t>& slotsToClear,
+                                     uint32_t activeBufferSlot) override;
     Error setLayerSurfaceDamage(Display display, Layer layer,
                                 const std::vector<IComposerClient::Rect>& damage) override;
     Error setLayerBlendMode(Display display, Layer layer, IComposerClient::BlendMode mode) override;
@@ -362,6 +365,9 @@
     sp<V2_3::IComposerClient> mClient_2_3;
     sp<IComposerClient> mClient_2_4;
 
+    // Buffer slots for layers are cleared by setting the slot buffer to this buffer.
+    sp<GraphicBuffer> mClearSlotBuffer;
+
     // 64KiB minus a small space for metadata such as read/write pointers
     static constexpr size_t kWriterInitialSize = 64 * 1024 / sizeof(uint32_t) - 16;
     // Max number of buffers that may be cached for a given layer
diff --git a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
index 3803a78..d62075e 100644
--- a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
@@ -103,6 +103,10 @@
     sink->setAsyncMode(true);
     IGraphicBufferProducer::QueueBufferOutput output;
     mSource[SOURCE_SCRATCH]->connect(nullptr, NATIVE_WINDOW_API_EGL, false, &output);
+
+    for (size_t i = 0; i < sizeof(mHwcBufferIds) / sizeof(mHwcBufferIds[0]); ++i) {
+        mHwcBufferIds[i] = UINT64_MAX;
+    }
 }
 
 VirtualDisplaySurface::~VirtualDisplaySurface() {
@@ -197,9 +201,9 @@
         return NO_MEMORY;
     }
 
-    sp<GraphicBuffer> fbBuffer = mFbProducerSlot >= 0 ?
-            mProducerBuffers[mFbProducerSlot] : sp<GraphicBuffer>(nullptr);
-    sp<GraphicBuffer> outBuffer = mProducerBuffers[mOutputProducerSlot];
+    sp<GraphicBuffer> const& fbBuffer =
+            mFbProducerSlot >= 0 ? mProducerBuffers[mFbProducerSlot] : sp<GraphicBuffer>(nullptr);
+    sp<GraphicBuffer> const& outBuffer = mProducerBuffers[mOutputProducerSlot];
     VDS_LOGV("%s: fb=%d(%p) out=%d(%p)", __func__, mFbProducerSlot, fbBuffer.get(),
              mOutputProducerSlot, outBuffer.get());
 
@@ -211,12 +215,14 @@
 
     status_t result = NO_ERROR;
     if (fbBuffer != nullptr) {
-        uint32_t hwcSlot = 0;
-        sp<GraphicBuffer> hwcBuffer;
-        mHwcBufferCache.getHwcBuffer(mFbProducerSlot, fbBuffer, &hwcSlot, &hwcBuffer);
-
+        // assume that HWC has previously seen the buffer in this slot
+        sp<GraphicBuffer> hwcBuffer = sp<GraphicBuffer>(nullptr);
+        if (fbBuffer->getId() != mHwcBufferIds[mFbProducerSlot]) {
+            mHwcBufferIds[mFbProducerSlot] = fbBuffer->getId();
+            hwcBuffer = fbBuffer; // HWC hasn't previously seen this buffer in this slot
+        }
         // TODO: Correctly propagate the dataspace from GL composition
-        result = mHwc.setClientTarget(*halDisplayId, hwcSlot, mFbFence, hwcBuffer,
+        result = mHwc.setClientTarget(*halDisplayId, mFbProducerSlot, mFbFence, hwcBuffer,
                                       ui::Dataspace::UNKNOWN);
     }
 
diff --git a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h
index e21095a..be06e2b 100644
--- a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h
+++ b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.h
@@ -20,7 +20,7 @@
 #include <string>
 
 #include <compositionengine/DisplaySurface.h>
-#include <compositionengine/impl/HwcBufferCache.h>
+#include <gui/BufferQueue.h>
 #include <gui/ConsumerBase.h>
 #include <gui/IGraphicBufferProducer.h>
 #include <ui/DisplayId.h>
@@ -164,6 +164,10 @@
     sp<IGraphicBufferProducer> mSource[2]; // indexed by SOURCE_*
     uint32_t mDefaultOutputFormat;
 
+    // Buffers that HWC has seen before, indexed by HWC slot number.
+    // NOTE: The BufferQueue slot number is the same as the HWC slot number.
+    uint64_t mHwcBufferIds[BufferQueue::NUM_BUFFER_SLOTS];
+
     //
     // Inter-frame state
     //
@@ -260,8 +264,6 @@
 
     bool mMustRecompose = false;
 
-    compositionengine::impl::HwcBufferCache mHwcBufferCache;
-
     bool mForceHwcCopy;
 };
 
diff --git a/services/surfaceflinger/FrontEnd/LayerHierarchy.cpp b/services/surfaceflinger/FrontEnd/LayerHierarchy.cpp
new file mode 100644
index 0000000..db4e8af
--- /dev/null
+++ b/services/surfaceflinger/FrontEnd/LayerHierarchy.cpp
@@ -0,0 +1,472 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+#undef LOG_TAG
+#define LOG_TAG "LayerHierarchy"
+
+#include "LayerHierarchy.h"
+#include "SwapErase.h"
+
+namespace android::surfaceflinger::frontend {
+
+namespace {
+auto layerZCompare = [](const std::pair<LayerHierarchy*, LayerHierarchy::Variant>& lhs,
+                        const std::pair<LayerHierarchy*, LayerHierarchy::Variant>& rhs) {
+    auto lhsLayer = lhs.first->getLayer();
+    auto rhsLayer = rhs.first->getLayer();
+    if (lhsLayer->layerStack != rhsLayer->layerStack) {
+        return lhsLayer->layerStack.id < rhsLayer->layerStack.id;
+    }
+    if (lhsLayer->z != rhsLayer->z) {
+        return lhsLayer->z < rhsLayer->z;
+    }
+    return lhsLayer->id < rhsLayer->id;
+};
+
+void insertSorted(std::vector<std::pair<LayerHierarchy*, LayerHierarchy::Variant>>& vec,
+                  std::pair<LayerHierarchy*, LayerHierarchy::Variant> value) {
+    auto it = std::upper_bound(vec.begin(), vec.end(), value, layerZCompare);
+    vec.insert(it, std::move(value));
+}
+} // namespace
+
+LayerHierarchy::LayerHierarchy(RequestedLayerState* layer) : mLayer(layer) {}
+
+LayerHierarchy::LayerHierarchy(const LayerHierarchy& hierarchy, bool childrenOnly) {
+    mLayer = (childrenOnly) ? nullptr : hierarchy.mLayer;
+    mChildren = hierarchy.mChildren;
+}
+
+void LayerHierarchy::traverse(const Visitor& visitor,
+                              LayerHierarchy::TraversalPath& traversalPath) const {
+    if (mLayer) {
+        bool breakTraversal = !visitor(*this, traversalPath);
+        if (breakTraversal) {
+            return;
+        }
+    }
+    if (traversalPath.hasRelZLoop()) {
+        LOG_ALWAYS_FATAL("Found relative z loop layerId:%d", traversalPath.invalidRelativeRootId);
+    }
+    for (auto& [child, childVariant] : mChildren) {
+        ScopedAddToTraversalPath addChildToTraversalPath(traversalPath, child->mLayer->id,
+                                                         childVariant);
+        child->traverse(visitor, traversalPath);
+    }
+}
+
+void LayerHierarchy::traverseInZOrder(const Visitor& visitor,
+                                      LayerHierarchy::TraversalPath& traversalPath) const {
+    bool traverseThisLayer = (mLayer != nullptr);
+    for (auto it = mChildren.begin(); it < mChildren.end(); it++) {
+        auto& [child, childVariant] = *it;
+        if (traverseThisLayer && child->getLayer()->z >= 0) {
+            bool breakTraversal = !visitor(*this, traversalPath);
+            if (breakTraversal) {
+                return;
+            }
+            traverseThisLayer = false;
+        }
+        if (childVariant == LayerHierarchy::Variant::Detached) {
+            continue;
+        }
+        ScopedAddToTraversalPath addChildToTraversalPath(traversalPath, child->mLayer->id,
+                                                         childVariant);
+        child->traverseInZOrder(visitor, traversalPath);
+    }
+
+    if (traverseThisLayer) {
+        visitor(*this, traversalPath);
+    }
+}
+
+void LayerHierarchy::addChild(LayerHierarchy* child, LayerHierarchy::Variant variant) {
+    insertSorted(mChildren, {child, variant});
+}
+
+void LayerHierarchy::removeChild(LayerHierarchy* child) {
+    auto it = std::find_if(mChildren.begin(), mChildren.end(),
+                           [child](const std::pair<LayerHierarchy*, Variant>& x) {
+                               return x.first == child;
+                           });
+    if (it == mChildren.end()) {
+        LOG_ALWAYS_FATAL("Could not find child!");
+    }
+    mChildren.erase(it);
+}
+
+void LayerHierarchy::sortChildrenByZOrder() {
+    std::sort(mChildren.begin(), mChildren.end(), layerZCompare);
+}
+
+void LayerHierarchy::updateChild(LayerHierarchy* hierarchy, LayerHierarchy::Variant variant) {
+    auto it = std::find_if(mChildren.begin(), mChildren.end(),
+                           [hierarchy](std::pair<LayerHierarchy*, Variant>& child) {
+                               return child.first == hierarchy;
+                           });
+    if (it == mChildren.end()) {
+        LOG_ALWAYS_FATAL("Could not find child!");
+    } else {
+        it->second = variant;
+    }
+}
+
+const RequestedLayerState* LayerHierarchy::getLayer() const {
+    return mLayer;
+}
+
+std::string LayerHierarchy::getDebugStringShort() const {
+    std::string debug = "LayerHierarchy{";
+    debug += ((mLayer) ? mLayer->getDebugStringShort() : "root") + " ";
+    if (mChildren.empty()) {
+        debug += "no children";
+    } else {
+        debug += std::to_string(mChildren.size()) + " children";
+    }
+    return debug + "}";
+}
+
+std::string LayerHierarchy::getDebugString(const char* prefix) const {
+    std::string debug = prefix + getDebugStringShort();
+    for (auto& [child, childVariant] : mChildren) {
+        std::string childPrefix = "  " + std::string(prefix) + " " + std::to_string(childVariant);
+        debug += "\n" + child->getDebugString(childPrefix.c_str());
+    }
+    return debug;
+}
+
+bool LayerHierarchy::hasRelZLoop(uint32_t& outInvalidRelativeRoot) const {
+    outInvalidRelativeRoot = UNASSIGNED_LAYER_ID;
+    traverse([&outInvalidRelativeRoot](const LayerHierarchy&,
+                                       const LayerHierarchy::TraversalPath& traversalPath) -> bool {
+        if (traversalPath.hasRelZLoop()) {
+            outInvalidRelativeRoot = traversalPath.invalidRelativeRootId;
+            return false;
+        }
+        return true;
+    });
+    return outInvalidRelativeRoot != UNASSIGNED_LAYER_ID;
+}
+
+LayerHierarchyBuilder::LayerHierarchyBuilder(
+        const std::vector<std::unique_ptr<RequestedLayerState>>& layers) {
+    mHierarchies.reserve(layers.size());
+    mLayerIdToHierarchy.reserve(layers.size());
+    for (auto& layer : layers) {
+        mHierarchies.emplace_back(std::make_unique<LayerHierarchy>(layer.get()));
+        mLayerIdToHierarchy[layer->id] = mHierarchies.back().get();
+    }
+    for (const auto& layer : layers) {
+        onLayerAdded(layer.get());
+    }
+    detachHierarchyFromRelativeParent(&mOffscreenRoot);
+}
+
+void LayerHierarchyBuilder::attachToParent(LayerHierarchy* hierarchy) {
+    auto layer = hierarchy->mLayer;
+    LayerHierarchy::Variant type = layer->hasValidRelativeParent()
+            ? LayerHierarchy::Variant::Detached
+            : LayerHierarchy::Variant::Attached;
+
+    LayerHierarchy* parent;
+
+    if (layer->parentId != UNASSIGNED_LAYER_ID) {
+        parent = getHierarchyFromId(layer->parentId);
+    } else if (layer->canBeRoot) {
+        parent = &mRoot;
+    } else {
+        parent = &mOffscreenRoot;
+    }
+    parent->addChild(hierarchy, type);
+    hierarchy->mParent = parent;
+}
+
+void LayerHierarchyBuilder::detachFromParent(LayerHierarchy* hierarchy) {
+    hierarchy->mParent->removeChild(hierarchy);
+    hierarchy->mParent = nullptr;
+}
+
+void LayerHierarchyBuilder::attachToRelativeParent(LayerHierarchy* hierarchy) {
+    auto layer = hierarchy->mLayer;
+    if (!layer->hasValidRelativeParent() || hierarchy->mRelativeParent) {
+        return;
+    }
+
+    if (layer->relativeParentId != UNASSIGNED_LAYER_ID) {
+        hierarchy->mRelativeParent = getHierarchyFromId(layer->relativeParentId);
+    } else {
+        hierarchy->mRelativeParent = &mOffscreenRoot;
+    }
+    hierarchy->mRelativeParent->addChild(hierarchy, LayerHierarchy::Variant::Relative);
+    hierarchy->mParent->updateChild(hierarchy, LayerHierarchy::Variant::Detached);
+}
+
+void LayerHierarchyBuilder::detachFromRelativeParent(LayerHierarchy* hierarchy) {
+    if (hierarchy->mRelativeParent) {
+        hierarchy->mRelativeParent->removeChild(hierarchy);
+    }
+    hierarchy->mRelativeParent = nullptr;
+    hierarchy->mParent->updateChild(hierarchy, LayerHierarchy::Variant::Attached);
+}
+
+void LayerHierarchyBuilder::attachHierarchyToRelativeParent(LayerHierarchy* root) {
+    if (root->mLayer) {
+        attachToRelativeParent(root);
+    }
+    for (auto& [child, childVariant] : root->mChildren) {
+        if (childVariant == LayerHierarchy::Variant::Detached ||
+            childVariant == LayerHierarchy::Variant::Attached) {
+            attachHierarchyToRelativeParent(child);
+        }
+    }
+}
+
+void LayerHierarchyBuilder::detachHierarchyFromRelativeParent(LayerHierarchy* root) {
+    if (root->mLayer) {
+        detachFromRelativeParent(root);
+    }
+    for (auto& [child, childVariant] : root->mChildren) {
+        if (childVariant == LayerHierarchy::Variant::Detached ||
+            childVariant == LayerHierarchy::Variant::Attached) {
+            detachHierarchyFromRelativeParent(child);
+        }
+    }
+}
+
+void LayerHierarchyBuilder::onLayerAdded(RequestedLayerState* layer) {
+    LayerHierarchy* hierarchy = getHierarchyFromId(layer->id);
+    attachToParent(hierarchy);
+    attachToRelativeParent(hierarchy);
+
+    if (layer->mirrorId != UNASSIGNED_LAYER_ID) {
+        LayerHierarchy* mirror = getHierarchyFromId(layer->mirrorId);
+        hierarchy->addChild(mirror, LayerHierarchy::Variant::Mirror);
+    }
+}
+
+void LayerHierarchyBuilder::onLayerDestroyed(RequestedLayerState* layer) {
+    LayerHierarchy* hierarchy = getHierarchyFromId(layer->id, /*crashOnFailure=*/false);
+    if (!hierarchy) {
+        // Layer was never part of the hierarchy if it was created and destroyed in the same
+        // transaction.
+        return;
+    }
+    // detach from parent
+    detachFromRelativeParent(hierarchy);
+    detachFromParent(hierarchy);
+
+    // detach children
+    for (auto& [child, variant] : hierarchy->mChildren) {
+        if (variant == LayerHierarchy::Variant::Attached ||
+            variant == LayerHierarchy::Variant::Detached) {
+            mOffscreenRoot.addChild(child, LayerHierarchy::Variant::Attached);
+            child->mParent = &mOffscreenRoot;
+        } else if (variant == LayerHierarchy::Variant::Relative) {
+            mOffscreenRoot.addChild(child, LayerHierarchy::Variant::Attached);
+            child->mRelativeParent = &mOffscreenRoot;
+        }
+    }
+
+    swapErase(mHierarchies, [hierarchy](std::unique_ptr<LayerHierarchy>& layerHierarchy) {
+        return layerHierarchy.get() == hierarchy;
+    });
+    mLayerIdToHierarchy.erase(layer->id);
+}
+
+void LayerHierarchyBuilder::updateMirrorLayer(RequestedLayerState* layer) {
+    LayerHierarchy* hierarchy = getHierarchyFromId(layer->id);
+    auto it = hierarchy->mChildren.begin();
+    while (it != hierarchy->mChildren.end()) {
+        if (it->second == LayerHierarchy::Variant::Mirror) {
+            hierarchy->mChildren.erase(it);
+            break;
+        }
+        it++;
+    }
+
+    if (layer->mirrorId != UNASSIGNED_LAYER_ID) {
+        hierarchy->addChild(getHierarchyFromId(layer->mirrorId), LayerHierarchy::Variant::Mirror);
+    }
+}
+
+void LayerHierarchyBuilder::update(
+        const std::vector<std::unique_ptr<RequestedLayerState>>& layers,
+        const std::vector<std::unique_ptr<RequestedLayerState>>& destroyedLayers) {
+    // rebuild map
+    for (auto& layer : layers) {
+        if (layer->changes.test(RequestedLayerState::Changes::Created)) {
+            mHierarchies.emplace_back(std::make_unique<LayerHierarchy>(layer.get()));
+            mLayerIdToHierarchy[layer->id] = mHierarchies.back().get();
+        }
+    }
+
+    for (auto& layer : layers) {
+        if (layer->changes.get() == 0) {
+            continue;
+        }
+        if (layer->changes.test(RequestedLayerState::Changes::Created)) {
+            onLayerAdded(layer.get());
+            continue;
+        }
+        LayerHierarchy* hierarchy = getHierarchyFromId(layer->id);
+        if (layer->changes.test(RequestedLayerState::Changes::Parent)) {
+            detachFromParent(hierarchy);
+            attachToParent(hierarchy);
+        }
+        if (layer->changes.test(RequestedLayerState::Changes::RelativeParent)) {
+            detachFromRelativeParent(hierarchy);
+            attachToRelativeParent(hierarchy);
+        }
+        if (layer->changes.test(RequestedLayerState::Changes::Z)) {
+            hierarchy->mParent->sortChildrenByZOrder();
+            if (hierarchy->mRelativeParent) {
+                hierarchy->mRelativeParent->sortChildrenByZOrder();
+            }
+        }
+        if (layer->changes.test(RequestedLayerState::Changes::Mirror)) {
+            updateMirrorLayer(layer.get());
+        }
+    }
+
+    for (auto& layer : destroyedLayers) {
+        onLayerDestroyed(layer.get());
+    }
+    // When moving from onscreen to offscreen and vice versa, we need to attach and detach
+    // from our relative parents. This walks down both trees to do so. We can optimize this
+    // further by tracking onscreen, offscreen state in LayerHierarchy.
+    detachHierarchyFromRelativeParent(&mOffscreenRoot);
+    attachHierarchyToRelativeParent(&mRoot);
+}
+
+const LayerHierarchy& LayerHierarchyBuilder::getHierarchy() const {
+    return mRoot;
+}
+
+const LayerHierarchy& LayerHierarchyBuilder::getOffscreenHierarchy() const {
+    return mOffscreenRoot;
+}
+
+std::string LayerHierarchyBuilder::getDebugString(uint32_t layerId, uint32_t depth) const {
+    if (depth > 10) return "too deep, loop?";
+    if (layerId == UNASSIGNED_LAYER_ID) return "";
+    auto it = mLayerIdToHierarchy.find(layerId);
+    if (it == mLayerIdToHierarchy.end()) return "not found";
+
+    LayerHierarchy* hierarchy = it->second;
+    if (!hierarchy->mLayer) return "none";
+
+    std::string debug =
+            "[" + std::to_string(hierarchy->mLayer->id) + "] " + hierarchy->mLayer->name;
+    if (hierarchy->mRelativeParent) {
+        debug += " Relative:" + hierarchy->mRelativeParent->getDebugStringShort();
+    }
+    if (hierarchy->mParent) {
+        debug += " Parent:" + hierarchy->mParent->getDebugStringShort();
+    }
+    return debug;
+}
+
+LayerHierarchy LayerHierarchyBuilder::getPartialHierarchy(uint32_t layerId,
+                                                          bool childrenOnly) const {
+    auto it = mLayerIdToHierarchy.find(layerId);
+    if (it == mLayerIdToHierarchy.end()) return {nullptr};
+
+    LayerHierarchy hierarchy(*it->second, childrenOnly);
+    return hierarchy;
+}
+
+LayerHierarchy* LayerHierarchyBuilder::getHierarchyFromId(uint32_t layerId, bool crashOnFailure) {
+    auto it = mLayerIdToHierarchy.find(layerId);
+    if (it == mLayerIdToHierarchy.end()) {
+        if (crashOnFailure) {
+            LOG_ALWAYS_FATAL("Could not find hierarchy for layer id %d", layerId);
+        }
+        return nullptr;
+    };
+
+    return it->second;
+}
+
+LayerHierarchy::TraversalPath LayerHierarchy::TraversalPath::ROOT_TRAVERSAL_ID =
+        {.id = UNASSIGNED_LAYER_ID, .variant = LayerHierarchy::Attached};
+
+std::string LayerHierarchy::TraversalPath::toString() const {
+    std::string debugString = "TraversalPath{.id = " + std::to_string(id);
+
+    if (!mirrorRootIds.empty()) {
+        debugString += ", .mirrorRootIds=";
+        for (auto rootId : mirrorRootIds) {
+            debugString += std::to_string(rootId) + ",";
+        }
+    }
+
+    if (!relativeRootIds.empty()) {
+        debugString += ", .relativeRootIds=";
+        for (auto rootId : relativeRootIds) {
+            debugString += std::to_string(rootId) + ",";
+        }
+    }
+
+    if (hasRelZLoop()) {
+        debugString += ", hasRelZLoop=true invalidRelativeRootId=";
+        debugString += std::to_string(invalidRelativeRootId) + ",";
+    }
+
+    debugString += "}";
+    return debugString;
+}
+
+// Helper class to update a passed in TraversalPath when visiting a child. When the object goes out
+// of scope the TraversalPath is reset to its original state.
+LayerHierarchy::ScopedAddToTraversalPath::ScopedAddToTraversalPath(TraversalPath& traversalPath,
+                                                                   uint32_t layerId,
+                                                                   LayerHierarchy::Variant variant)
+      : mTraversalPath(traversalPath),
+        mParentId(traversalPath.id),
+        mParentVariant(traversalPath.variant) {
+    // Update the traversal id with the child layer id and variant. Parent id and variant are
+    // stored to reset the id upon destruction.
+    traversalPath.id = layerId;
+    traversalPath.variant = variant;
+    if (variant == LayerHierarchy::Variant::Mirror) {
+        traversalPath.mirrorRootIds.emplace_back(layerId);
+    }
+    if (variant == LayerHierarchy::Variant::Relative) {
+        if (std::find(traversalPath.relativeRootIds.begin(), traversalPath.relativeRootIds.end(),
+                      layerId) != traversalPath.relativeRootIds.end()) {
+            traversalPath.invalidRelativeRootId = layerId;
+        }
+        traversalPath.relativeRootIds.emplace_back(layerId);
+    }
+}
+LayerHierarchy::ScopedAddToTraversalPath::~ScopedAddToTraversalPath() {
+    // Reset the traversal id to its original parent state using the state that was saved in
+    // the constructor.
+    if (mTraversalPath.variant == LayerHierarchy::Variant::Mirror) {
+        mTraversalPath.mirrorRootIds.pop_back();
+    }
+    if (mTraversalPath.variant == LayerHierarchy::Variant::Relative) {
+        mTraversalPath.relativeRootIds.pop_back();
+    }
+    if (mTraversalPath.invalidRelativeRootId == mTraversalPath.id) {
+        mTraversalPath.invalidRelativeRootId = UNASSIGNED_LAYER_ID;
+    }
+    mTraversalPath.id = mParentId;
+    mTraversalPath.variant = mParentVariant;
+}
+
+} // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/FrontEnd/LayerHierarchy.h b/services/surfaceflinger/FrontEnd/LayerHierarchy.h
new file mode 100644
index 0000000..f83a859
--- /dev/null
+++ b/services/surfaceflinger/FrontEnd/LayerHierarchy.h
@@ -0,0 +1,163 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "FrontEnd/LayerCreationArgs.h"
+#include "RequestedLayerState.h"
+#include "ftl/small_vector.h"
+
+namespace android::surfaceflinger::frontend {
+class LayerHierarchyBuilder;
+
+// LayerHierarchy allows us to navigate the layer hierarchy in z-order, or depth first traversal.
+// The hierarchy is created from a set of RequestedLayerStates. The hierarchy itself does not
+// contain additional states. Instead, it is a representation of RequestedLayerStates as a graph.
+//
+// Each node in the hierarchy can be visited by multiple parents (making this a graph). While
+// traversing the hierarchy, a new concept called Variant can be used to understand the
+// relationship of the layer to its parent. The following variants are possible:
+// Attached - child of the parent
+// Detached - child of the parent but currently relative parented to another layer
+// Relative - relative child of the parent
+// Mirror - mirrored from another layer
+//
+// By representing the hierarchy as a graph, we can represent mirrored layer hierarchies without
+// cloning the layer requested state. The mirrored hierarchy and its corresponding
+// RequestedLayerStates are kept in sync because the mirrored hierarchy does not clone any
+// states.
+class LayerHierarchy {
+public:
+    enum Variant {
+        Attached,
+        Detached,
+        Relative,
+        Mirror,
+    };
+    // Represents a unique path to a node.
+    struct TraversalPath {
+        uint32_t id;
+        LayerHierarchy::Variant variant;
+        // Mirrored layers can have a different geometry than their parents so we need to track
+        // the mirror roots in the traversal.
+        ftl::SmallVector<uint32_t, 5> mirrorRootIds;
+        // Relative layers can be visited twice, once by their parent and then once again by
+        // their relative parent. We keep track of the roots here to detect any loops in the
+        // hierarchy. If a relative root already exists in the list while building the
+        // TraversalPath, it means that somewhere in the hierarchy two layers are relatively
+        // parented to each other.
+        ftl::SmallVector<uint32_t, 5> relativeRootIds;
+        // First duplicate relative root id found. If this is a valid layer id that means we are
+        // in a loop.
+        uint32_t invalidRelativeRootId = UNASSIGNED_LAYER_ID;
+        bool hasRelZLoop() const { return invalidRelativeRootId != UNASSIGNED_LAYER_ID; }
+        bool isRelative() { return !relativeRootIds.empty(); }
+
+        bool operator==(const TraversalPath& other) const {
+            return id == other.id && mirrorRootIds == other.mirrorRootIds;
+        }
+        std::string toString() const;
+
+        static TraversalPath ROOT_TRAVERSAL_ID;
+    };
+
+    // Helper class to add nodes to an existing traversal id and removes the
+    // node when it goes out of scope.
+    class ScopedAddToTraversalPath {
+    public:
+        ScopedAddToTraversalPath(TraversalPath& traversalPath, uint32_t layerId,
+                                 LayerHierarchy::Variant variantArg);
+        ~ScopedAddToTraversalPath();
+
+    private:
+        TraversalPath& mTraversalPath;
+        uint32_t mParentId;
+        LayerHierarchy::Variant mParentVariant;
+    };
+    LayerHierarchy(RequestedLayerState* layer);
+
+    // Visitor function that provides the hierarchy node and a traversal id which uniquely
+    // identifies how was visited. The hierarchy contains a pointer to the RequestedLayerState.
+    // Return false to stop traversing down the hierarchy.
+    typedef std::function<bool(const LayerHierarchy& hierarchy,
+                               const LayerHierarchy::TraversalPath& traversalPath)>
+            Visitor;
+
+    // Traverse the hierarchy and visit all child variants.
+    void traverse(const Visitor& visitor) const {
+        traverse(visitor, TraversalPath::ROOT_TRAVERSAL_ID);
+    }
+
+    // Traverse the hierarchy in z-order, skipping children that have relative parents.
+    void traverseInZOrder(const Visitor& visitor) const {
+        traverseInZOrder(visitor, TraversalPath::ROOT_TRAVERSAL_ID);
+    }
+
+    const RequestedLayerState* getLayer() const;
+    std::string getDebugString(const char* prefix = "") const;
+    std::string getDebugStringShort() const;
+    // Traverse the hierarchy and return true if loops are found. The outInvalidRelativeRoot
+    // will contain the first relative root that was visited twice in a traversal.
+    bool hasRelZLoop(uint32_t& outInvalidRelativeRoot) const;
+    std::vector<std::pair<LayerHierarchy*, Variant>> mChildren;
+
+private:
+    friend LayerHierarchyBuilder;
+    LayerHierarchy(const LayerHierarchy& hierarchy, bool childrenOnly);
+    void addChild(LayerHierarchy*, LayerHierarchy::Variant);
+    void removeChild(LayerHierarchy*);
+    void sortChildrenByZOrder();
+    void updateChild(LayerHierarchy*, LayerHierarchy::Variant);
+    void traverseInZOrder(const Visitor& visitor, LayerHierarchy::TraversalPath& parent) const;
+    void traverse(const Visitor& visitor, LayerHierarchy::TraversalPath& parent) const;
+
+    const RequestedLayerState* mLayer;
+    LayerHierarchy* mParent = nullptr;
+    LayerHierarchy* mRelativeParent = nullptr;
+};
+
+// Given a list of RequestedLayerState, this class will build a root hierarchy and an
+// offscreen hierarchy. The builder also has an update method which can update an existing
+// hierarchy from a list of RequestedLayerState and associated change flags.
+class LayerHierarchyBuilder {
+public:
+    LayerHierarchyBuilder(const std::vector<std::unique_ptr<RequestedLayerState>>&);
+    void update(const std::vector<std::unique_ptr<RequestedLayerState>>& layers,
+                const std::vector<std::unique_ptr<RequestedLayerState>>& destroyedLayers);
+    LayerHierarchy getPartialHierarchy(uint32_t, bool childrenOnly) const;
+    const LayerHierarchy& getHierarchy() const;
+    const LayerHierarchy& getOffscreenHierarchy() const;
+    std::string getDebugString(uint32_t layerId, uint32_t depth = 0) const;
+
+private:
+    void onLayerAdded(RequestedLayerState* layer);
+    void attachToParent(LayerHierarchy*);
+    void detachFromParent(LayerHierarchy*);
+    void attachToRelativeParent(LayerHierarchy*);
+    void detachFromRelativeParent(LayerHierarchy*);
+    void attachHierarchyToRelativeParent(LayerHierarchy*);
+    void detachHierarchyFromRelativeParent(LayerHierarchy*);
+
+    void onLayerDestroyed(RequestedLayerState* layer);
+    void updateMirrorLayer(RequestedLayerState* layer);
+    LayerHierarchy* getHierarchyFromId(uint32_t layerId, bool crashOnFailure = true);
+    std::unordered_map<uint32_t, LayerHierarchy*> mLayerIdToHierarchy;
+    std::vector<std::unique_ptr<LayerHierarchy>> mHierarchies;
+    LayerHierarchy mRoot{nullptr};
+    LayerHierarchy mOffscreenRoot{nullptr};
+};
+
+} // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
index 7afa144..fdf60b3 100644
--- a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
@@ -42,10 +42,10 @@
                              it->second.owner.getDebugString().c_str());
         }
 
-        linkLayer(layer.parentId, layer.id);
-        linkLayer(layer.relativeParentId, layer.id);
-        linkLayer(layer.mirrorId, layer.id);
-        linkLayer(layer.touchCropId, layer.id);
+        layer.parentId = linkLayer(layer.parentId, layer.id);
+        layer.relativeParentId = linkLayer(layer.relativeParentId, layer.id);
+        layer.mirrorId = linkLayer(layer.mirrorId, layer.id);
+        layer.touchCropId = linkLayer(layer.touchCropId, layer.id);
 
         mLayers.emplace_back(std::move(newLayer));
     }
@@ -83,10 +83,10 @@
 
         RequestedLayerState& layer = it->second.owner;
 
-        unlinkLayer(layer.parentId, layer.id);
-        unlinkLayer(layer.relativeParentId, layer.id);
-        unlinkLayer(layer.mirrorId, layer.id);
-        unlinkLayer(layer.touchCropId, layer.id);
+        layer.parentId = unlinkLayer(layer.parentId, layer.id);
+        layer.relativeParentId = unlinkLayer(layer.relativeParentId, layer.id);
+        layer.mirrorId = unlinkLayer(layer.mirrorId, layer.id);
+        layer.touchCropId = unlinkLayer(layer.touchCropId, layer.id);
 
         auto& references = it->second.references;
         for (uint32_t linkedLayerId : references) {
@@ -199,15 +199,15 @@
 
             if (oldParentId != layer->parentId) {
                 unlinkLayer(oldParentId, layer->id);
-                linkLayer(layer->parentId, layer->id);
+                layer->parentId = linkLayer(layer->parentId, layer->id);
             }
             if (oldRelativeParentId != layer->relativeParentId) {
                 unlinkLayer(oldRelativeParentId, layer->id);
-                linkLayer(layer->relativeParentId, layer->id);
+                layer->relativeParentId = linkLayer(layer->relativeParentId, layer->id);
             }
             if (oldTouchCropId != layer->touchCropId) {
                 unlinkLayer(oldTouchCropId, layer->id);
-                linkLayer(layer->touchCropId, layer->id);
+                layer->touchCropId = linkLayer(layer->touchCropId, layer->id);
             }
 
             mGlobalChanges |= layer->changes &
@@ -287,26 +287,28 @@
     return &it->second.references;
 }
 
-void LayerLifecycleManager::linkLayer(uint32_t layerId, uint32_t layerToLink) {
-    if (layerToLink && layerId != UNASSIGNED_LAYER_ID) {
-        std::vector<uint32_t>* linkedLayers = getLinkedLayersFromId(layerId);
-        if (!linkedLayers) {
-            LOG_ALWAYS_FATAL("Could not find layer id %d to link %d", layerId, layerToLink);
-            return;
-        }
-        linkedLayers->emplace_back(layerToLink);
+uint32_t LayerLifecycleManager::linkLayer(uint32_t layerId, uint32_t layerToLink) {
+    if (layerId == UNASSIGNED_LAYER_ID) {
+        return UNASSIGNED_LAYER_ID;
     }
-}
-
-void LayerLifecycleManager::unlinkLayer(uint32_t& inOutLayerId, uint32_t linkedLayer) {
-    uint32_t layerId = inOutLayerId;
-    inOutLayerId = UNASSIGNED_LAYER_ID;
 
     std::vector<uint32_t>* linkedLayers = getLinkedLayersFromId(layerId);
     if (!linkedLayers) {
-        return;
+        ALOGV("Could not find layer id %d to link %d. Parent is probably destroyed", layerId,
+              layerToLink);
+        return UNASSIGNED_LAYER_ID;
+    }
+    linkedLayers->emplace_back(layerToLink);
+    return layerId;
+}
+
+uint32_t LayerLifecycleManager::unlinkLayer(uint32_t layerId, uint32_t linkedLayer) {
+    std::vector<uint32_t>* linkedLayers = getLinkedLayersFromId(layerId);
+    if (!linkedLayers) {
+        return UNASSIGNED_LAYER_ID;
     }
     swapErase(*linkedLayers, linkedLayer);
+    return UNASSIGNED_LAYER_ID;
 }
 
 std::string LayerLifecycleManager::References::getDebugString() const {
@@ -318,4 +320,16 @@
     return debugInfo;
 }
 
+void LayerLifecycleManager::fixRelativeZLoop(uint32_t relativeRootId) {
+    auto it = mIdToLayer.find(relativeRootId);
+    if (it == mIdToLayer.end()) {
+        return;
+    }
+    RequestedLayerState& layer = it->second.owner;
+    layer.relativeParentId = unlinkLayer(layer.relativeParentId, layer.id);
+    layer.changes |=
+            RequestedLayerState::Changes::Hierarchy | RequestedLayerState::Changes::RelativeParent;
+    mGlobalChanges |= RequestedLayerState::Changes::Hierarchy;
+}
+
 } // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.h b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.h
index ad70d3f..63a7afc 100644
--- a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.h
+++ b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.h
@@ -42,6 +42,12 @@
     void applyTransactions(const std::vector<TransactionState>&);
     void onHandlesDestroyed(const std::vector<uint32_t>&);
 
+    // Detaches the layer from its relative parent to prevent a loop in the
+    // layer hierarchy. This overrides the RequestedLayerState and leaves
+    // the system in an invalid state. This is always a client error that
+    // needs to be fixed but overriding the state allows us to fail gracefully.
+    void fixRelativeZLoop(uint32_t relativeRootId);
+
     // Destroys RequestedLayerStates that are marked to be destroyed. Invokes all
     // ILifecycleListener callbacks and clears any change flags from previous state
     // updates. This function should be called outside the hot path since it's not
@@ -72,8 +78,8 @@
 
     RequestedLayerState* getLayerFromId(uint32_t);
     std::vector<uint32_t>* getLinkedLayersFromId(uint32_t);
-    void linkLayer(uint32_t layerId, uint32_t layerToLink);
-    void unlinkLayer(uint32_t& inOutLayerId, uint32_t linkedLayer);
+    uint32_t linkLayer(uint32_t layerId, uint32_t layerToLink);
+    uint32_t unlinkLayer(uint32_t layerId, uint32_t linkedLayer);
 
     struct References {
         // Lifetime tied to mLayers
diff --git a/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp b/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp
index 45058d9..054382c 100644
--- a/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp
+++ b/services/surfaceflinger/FrontEnd/RequestedLayerState.cpp
@@ -40,7 +40,7 @@
 }
 
 std::string layerIdToString(uint32_t layerId) {
-    return layerId == UNASSIGNED_LAYER_ID ? std::to_string(layerId) : "none";
+    return layerId == UNASSIGNED_LAYER_ID ? "none" : std::to_string(layerId);
 }
 
 } // namespace
@@ -147,13 +147,17 @@
         static const mat4 identityMatrix = mat4();
         hasColorTransform = colorTransform != identityMatrix;
     }
-    if (clientState.what & layer_state_t::eLayerChanged) {
+    if (clientState.what & (layer_state_t::eLayerChanged | layer_state_t::eRelativeLayerChanged)) {
         changes |= RequestedLayerState::Changes::Z;
     }
     if (clientState.what & layer_state_t::eReparent) {
         changes |= RequestedLayerState::Changes::Parent;
         parentId = getLayerIdFromSurfaceControl(clientState.parentSurfaceControlForChild);
         parentSurfaceControlForChild = nullptr;
+        // Once a layer has be reparented, it cannot be placed at the root. It sounds odd
+        // but thats the existing logic and until we make this behavior more explicit, we need
+        // to maintain this logic.
+        canBeRoot = false;
     }
     if (clientState.what & layer_state_t::eRelativeLayerChanged) {
         changes |= RequestedLayerState::Changes::RelativeParent;
@@ -190,7 +194,6 @@
 
     if (clientState.what & layer_state_t::eBufferChanged) {
         externalTexture = resolvedComposerState.externalTexture;
-        hwcBufferSlot = resolvedComposerState.hwcBufferSlot;
     }
 
     if (clientState.what & layer_state_t::ePositionChanged) {
@@ -254,7 +257,7 @@
             ",relativeParent=" + layerIdToString(relativeParentId) +
             ",isRelativeOf=" + std::to_string(isRelativeOf) +
             ",mirrorId=" + layerIdToString(mirrorId) +
-            ",handleAlive=" + std::to_string(handleAlive);
+            ",handleAlive=" + std::to_string(handleAlive) + ",z=" + std::to_string(z);
 }
 
 std::string RequestedLayerState::getDebugStringShort() const {
@@ -355,4 +358,13 @@
     return Region(win).subtract(exclude).getBounds();
 }
 
+// Returns true if the layer has a relative parent that is not its own parent. This is an input
+// error from the client, and this check allows us to handle it gracefully. If both parentId and
+// relativeParentId is unassigned then the layer does not have a valid relative parent.
+// If the relative parentid is unassigned, the layer will be considered relative but won't be
+// reachable.
+bool RequestedLayerState::hasValidRelativeParent() const {
+    return isRelativeOf && parentId != relativeParentId;
+}
+
 } // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/FrontEnd/RequestedLayerState.h b/services/surfaceflinger/FrontEnd/RequestedLayerState.h
index 0ddf5e2..7849165 100644
--- a/services/surfaceflinger/FrontEnd/RequestedLayerState.h
+++ b/services/surfaceflinger/FrontEnd/RequestedLayerState.h
@@ -62,13 +62,14 @@
     std::string getDebugString() const;
     std::string getDebugStringShort() const;
     aidl::android::hardware::graphics::composer3::Composition getCompositionType() const;
+    bool hasValidRelativeParent() const;
 
     // Layer serial number.  This gives layers an explicit ordering, so we
     // have a stable sort order when their layer stack and Z-order are
     // the same.
     const uint32_t id;
     const std::string name;
-    const bool canBeRoot = false;
+    bool canBeRoot = false;
     const uint32_t layerCreationFlags;
     const uint32_t textureName;
     // The owner of the layer. If created from a non system process, it will be the calling uid.
@@ -86,7 +87,6 @@
     ui::Transform requestedTransform;
     std::shared_ptr<FenceTime> acquireFenceTime;
     std::shared_ptr<renderengine::ExternalTexture> externalTexture;
-    int hwcBufferSlot = 0;
 
     // book keeping states
     bool handleAlive = true;
diff --git a/services/surfaceflinger/FrontEnd/TransactionHandler.cpp b/services/surfaceflinger/FrontEnd/TransactionHandler.cpp
index 8629671..c2109b3 100644
--- a/services/surfaceflinger/FrontEnd/TransactionHandler.cpp
+++ b/services/surfaceflinger/FrontEnd/TransactionHandler.cpp
@@ -177,7 +177,7 @@
     }
 
     mStalledTransactions.push_back(transactionId);
-    listener->onTransactionQueueStalled(String8(reason.c_str()));
+    listener->onTransactionQueueStalled(reason);
 }
 
 void TransactionHandler::removeFromStalledTransactions(uint64_t id) {
diff --git a/services/surfaceflinger/FrontEnd/TransactionHandler.h b/services/surfaceflinger/FrontEnd/TransactionHandler.h
index a06b870..475ff1b 100644
--- a/services/surfaceflinger/FrontEnd/TransactionHandler.h
+++ b/services/surfaceflinger/FrontEnd/TransactionHandler.h
@@ -29,6 +29,7 @@
 namespace android {
 
 class TestableSurfaceFlinger;
+using gui::IListenerHash;
 namespace surfaceflinger::frontend {
 
 class TransactionHandler {
diff --git a/services/surfaceflinger/HwcSlotGenerator.cpp b/services/surfaceflinger/HwcSlotGenerator.cpp
deleted file mode 100644
index 939c35b..0000000
--- a/services/surfaceflinger/HwcSlotGenerator.cpp
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * Copyright 2022 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#undef LOG_TAG
-#define LOG_TAG "HwcSlotGenerator"
-#define ATRACE_TAG ATRACE_TAG_GRAPHICS
-
-#include <gui/BufferQueue.h>
-
-#include "HwcSlotGenerator.h"
-
-namespace android {
-
-HwcSlotGenerator::HwcSlotGenerator() {
-    for (int i = 0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) {
-        mFreeHwcCacheSlots.push(i);
-    }
-}
-
-void HwcSlotGenerator::bufferErased(const client_cache_t& clientCacheId) {
-    std::lock_guard lock(mMutex);
-    if (!clientCacheId.isValid()) {
-        ALOGE("invalid process, failed to erase buffer");
-        return;
-    }
-    eraseBufferLocked(clientCacheId);
-}
-
-int HwcSlotGenerator::getHwcCacheSlot(const client_cache_t& clientCacheId) {
-    std::lock_guard<std::mutex> lock(mMutex);
-    auto itr = mCachedBuffers.find(clientCacheId);
-    if (itr == mCachedBuffers.end()) {
-        return addCachedBuffer(clientCacheId);
-    }
-    auto& [hwcCacheSlot, counter] = itr->second;
-    counter = mCounter++;
-    return hwcCacheSlot;
-}
-
-int HwcSlotGenerator::addCachedBuffer(const client_cache_t& clientCacheId) REQUIRES(mMutex) {
-    if (!clientCacheId.isValid()) {
-        ALOGE("invalid process, returning invalid slot");
-        return BufferQueue::INVALID_BUFFER_SLOT;
-    }
-
-    ClientCache::getInstance().registerErasedRecipient(clientCacheId,
-                                                       wp<ErasedRecipient>::fromExisting(this));
-
-    int hwcCacheSlot = getFreeHwcCacheSlot();
-    mCachedBuffers[clientCacheId] = {hwcCacheSlot, mCounter++};
-    return hwcCacheSlot;
-}
-
-int HwcSlotGenerator::getFreeHwcCacheSlot() REQUIRES(mMutex) {
-    if (mFreeHwcCacheSlots.empty()) {
-        evictLeastRecentlyUsed();
-    }
-
-    int hwcCacheSlot = mFreeHwcCacheSlots.top();
-    mFreeHwcCacheSlots.pop();
-    return hwcCacheSlot;
-}
-
-void HwcSlotGenerator::evictLeastRecentlyUsed() REQUIRES(mMutex) {
-    uint64_t minCounter = UINT_MAX;
-    client_cache_t minClientCacheId = {};
-    for (const auto& [clientCacheId, slotCounter] : mCachedBuffers) {
-        const auto& [hwcCacheSlot, counter] = slotCounter;
-        if (counter < minCounter) {
-            minCounter = counter;
-            minClientCacheId = clientCacheId;
-        }
-    }
-    eraseBufferLocked(minClientCacheId);
-
-    ClientCache::getInstance().unregisterErasedRecipient(minClientCacheId,
-                                                         wp<ErasedRecipient>::fromExisting(this));
-}
-
-void HwcSlotGenerator::eraseBufferLocked(const client_cache_t& clientCacheId) REQUIRES(mMutex) {
-    auto itr = mCachedBuffers.find(clientCacheId);
-    if (itr == mCachedBuffers.end()) {
-        return;
-    }
-    auto& [hwcCacheSlot, counter] = itr->second;
-
-    // TODO send to hwc cache and resources
-
-    mFreeHwcCacheSlots.push(hwcCacheSlot);
-    mCachedBuffers.erase(clientCacheId);
-}
-
-} // namespace android
diff --git a/services/surfaceflinger/HwcSlotGenerator.h b/services/surfaceflinger/HwcSlotGenerator.h
deleted file mode 100644
index 5a1b6d7..0000000
--- a/services/surfaceflinger/HwcSlotGenerator.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Copyright 2022 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <functional>
-#include <mutex>
-#include <stack>
-#include <unordered_map>
-
-#include "ClientCache.h"
-
-namespace android {
-
-class HwcSlotGenerator : public ClientCache::ErasedRecipient {
-public:
-    HwcSlotGenerator();
-    void bufferErased(const client_cache_t& clientCacheId);
-    int getHwcCacheSlot(const client_cache_t& clientCacheId);
-
-private:
-    friend class SlotGenerationTest;
-    int addCachedBuffer(const client_cache_t& clientCacheId) REQUIRES(mMutex);
-    int getFreeHwcCacheSlot() REQUIRES(mMutex);
-    void evictLeastRecentlyUsed() REQUIRES(mMutex);
-    void eraseBufferLocked(const client_cache_t& clientCacheId) REQUIRES(mMutex);
-
-    struct CachedBufferHash {
-        std::size_t operator()(const client_cache_t& clientCacheId) const {
-            return std::hash<uint64_t>{}(clientCacheId.id);
-        }
-    };
-
-    std::mutex mMutex;
-
-    std::unordered_map<client_cache_t, std::pair<int /*HwcCacheSlot*/, uint64_t /*counter*/>,
-                       CachedBufferHash>
-            mCachedBuffers GUARDED_BY(mMutex);
-    std::stack<int /*HwcCacheSlot*/> mFreeHwcCacheSlots GUARDED_BY(mMutex);
-
-    // The cache increments this counter value when a slot is updated or used.
-    // Used to track the least recently-used buffer
-    uint64_t mCounter = 0;
-};
-} // namespace android
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 0017af0..1f159ae 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -144,7 +144,6 @@
         mLayerCreationFlags(args.flags),
         mBorderEnabled(false),
         mTextureName(args.textureName),
-        mHwcSlotGenerator(sp<HwcSlotGenerator>::make()),
         mLayerFE(args.flinger->getFactory().createLayerFE(mName)) {
     ALOGV("Creating Layer %s", getDebugName());
 
@@ -217,6 +216,9 @@
 }
 
 Layer::~Layer() {
+    LOG_ALWAYS_FATAL_IF(std::this_thread::get_id() != mFlinger->mMainThreadId,
+                        "Layer destructor called off the main thread.");
+
     // The original layer and the clone layer share the same texture and buffer. Therefore, only
     // one of the layers, in this case the original layer, needs to handle the deletion. The
     // original layer and the clone should be removed at the same time so there shouldn't be any
@@ -573,9 +575,6 @@
     }
 
     snapshot->buffer = getBuffer();
-    snapshot->bufferSlot = (mBufferInfo.mBufferSlot == BufferQueue::INVALID_BUFFER_SLOT)
-            ? 0
-            : mBufferInfo.mBufferSlot;
     snapshot->acquireFence = mBufferInfo.mFence;
     snapshot->frameNumber = mBufferInfo.mFrameNumber;
     snapshot->sidebandStreamHasFrame = false;
@@ -1472,8 +1471,9 @@
     mFrameTracker.getStats(outStats);
 }
 
-void Layer::dumpCallingUidPid(std::string& result) const {
-    StringAppendF(&result, "Layer %s (%s) ownerPid:%d ownerUid:%d\n", getName().c_str(), getType(),
+void Layer::dumpOffscreenDebugInfo(std::string& result) const {
+    std::string hasBuffer = hasBufferOrSidebandStream() ? " (contains buffer)" : "";
+    StringAppendF(&result, "Layer %s%s pid:%d uid:%d\n", getName().c_str(), hasBuffer.c_str(),
                   mOwnerPid, mOwnerUid);
 }
 
@@ -2604,9 +2604,12 @@
         return;
     }
     ATRACE_FORMAT_INSTANT("callReleaseBufferCallback %s - %" PRIu64, getDebugName(), framenumber);
-    listener->onReleaseBuffer({buffer->getId(), framenumber},
-                              releaseFence ? releaseFence : Fence::NO_FENCE,
-                              currentMaxAcquiredBufferCount);
+    std::optional<os::ParcelFileDescriptor> fenceFd;
+    if (releaseFence) {
+        fenceFd = os::ParcelFileDescriptor(base::unique_fd(::dup(releaseFence->get())));
+    }
+    listener->onReleaseBuffer({buffer->getId(), framenumber}, fenceFd,
+                              static_cast<int32_t>(currentMaxAcquiredBufferCount));
 }
 
 void Layer::onLayerDisplayed(ftl::SharedFuture<FenceResult> futureFenceResult) {
@@ -2840,7 +2843,7 @@
 bool Layer::setBuffer(std::shared_ptr<renderengine::ExternalTexture>& buffer,
                       const BufferData& bufferData, nsecs_t postTime, nsecs_t desiredPresentTime,
                       bool isAutoTimestamp, std::optional<nsecs_t> dequeueTime,
-                      const FrameTimelineInfo& info, int hwcBufferSlot) {
+                      const FrameTimelineInfo& info) {
     ATRACE_FORMAT("setBuffer %s - hasBuffer=%s", getDebugName(), (buffer ? "true" : "false"));
     if (!buffer) {
         return false;
@@ -2886,7 +2889,6 @@
     mDrawingState.releaseBufferListener = bufferData.releaseBufferListener;
     mDrawingState.buffer = std::move(buffer);
     mDrawingState.clientCacheId = bufferData.cachedBuffer;
-    mDrawingState.hwcBufferSlot = hwcBufferSlot;
     mDrawingState.acquireFence = bufferData.flags.test(BufferData::BufferDataChange::fenceChanged)
             ? bufferData.acquireFence
             : Fence::NO_FENCE;
@@ -3185,7 +3187,6 @@
     mBufferInfo.mHdrMetadata = mDrawingState.hdrMetadata;
     mBufferInfo.mApi = mDrawingState.api;
     mBufferInfo.mTransformToDisplayInverse = mDrawingState.transformToDisplayInverse;
-    mBufferInfo.mBufferSlot = mDrawingState.hwcBufferSlot;
 }
 
 Rect Layer::computeBufferCrop(const State& s) {
@@ -3968,10 +3969,6 @@
     }
 }
 
-int Layer::getHwcCacheSlot(const client_cache_t& clientCacheId) {
-    return mHwcSlotGenerator->getHwcCacheSlot(clientCacheId);
-}
-
 LayerSnapshotGuard::LayerSnapshotGuard(Layer* layer) : mLayer(layer) {
     if (mLayer) {
         mLayer->mLayerFE->mSnapshot = std::move(mLayer->mSnapshot);
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index f743896..08a13a3 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -51,7 +51,6 @@
 #include "Client.h"
 #include "DisplayHardware/HWComposer.h"
 #include "FrameTracker.h"
-#include "HwcSlotGenerator.h"
 #include "LayerFE.h"
 #include "LayerVector.h"
 #include "Scheduler/LayerInfo.h"
@@ -146,7 +145,6 @@
         bool transformToDisplayInverse;
         Region transparentRegionHint;
         std::shared_ptr<renderengine::ExternalTexture> buffer;
-        int hwcBufferSlot;
         client_cache_t clientCacheId;
         sp<Fence> acquireFence;
         std::shared_ptr<FenceTime> acquireFenceTime;
@@ -298,8 +296,7 @@
     bool setBuffer(std::shared_ptr<renderengine::ExternalTexture>& /* buffer */,
                    const BufferData& /* bufferData */, nsecs_t /* postTime */,
                    nsecs_t /*desiredPresentTime*/, bool /*isAutoTimestamp*/,
-                   std::optional<nsecs_t> /* dequeueTime */, const FrameTimelineInfo& /*info*/,
-                   int /* hwcBufferSlot */);
+                   std::optional<nsecs_t> /* dequeueTime */, const FrameTimelineInfo& /*info*/);
     bool setDataspace(ui::Dataspace /*dataspace*/);
     bool setHdrMetadata(const HdrMetadata& /*hdrMetadata*/);
     bool setSurfaceDamageRegion(const Region& /*surfaceDamage*/);
@@ -500,7 +497,6 @@
 
         std::shared_ptr<renderengine::ExternalTexture> mBuffer;
         uint64_t mFrameNumber;
-        int mBufferSlot{BufferQueue::INVALID_BUFFER_SLOT};
 
         bool mFrameLatencyNeeded{false};
     };
@@ -634,7 +630,7 @@
 
     void miniDump(std::string& result, const DisplayDevice&) const;
     void dumpFrameStats(std::string& result) const;
-    void dumpCallingUidPid(std::string& result) const;
+    void dumpOffscreenDebugInfo(std::string& result) const;
     void clearFrameStats();
     void logFrameStats();
     void getFrameStats(FrameStats* outStats) const;
@@ -813,7 +809,6 @@
     void updateMetadataSnapshot(const LayerMetadata& parentMetadata);
     void updateRelativeMetadataSnapshot(const LayerMetadata& relativeLayerMetadata,
                                         std::unordered_set<Layer*>& visited);
-    int getHwcCacheSlot(const client_cache_t& clientCacheId);
 
 protected:
     // For unit tests
@@ -1124,8 +1119,6 @@
     // not specify a destination frame.
     ui::Transform mRequestedTransform;
 
-    sp<HwcSlotGenerator> mHwcSlotGenerator;
-
     sp<LayerFE> mLayerFE;
     std::unique_ptr<LayerSnapshot> mSnapshot = std::make_unique<LayerSnapshot>();
 
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 34f8df2..856fda0 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -815,18 +815,18 @@
             .powerOnImminent = powerOnImminent};
 }
 
-ftl::Optional<FrameRateMode> Scheduler::getPreferredDisplayMode() {
+FrameRateMode Scheduler::getPreferredDisplayMode() {
     std::lock_guard<std::mutex> lock(mPolicyLock);
-    // Make sure the stored mode is up to date.
-    if (mPolicy.modeOpt) {
-        const auto ranking =
-                leaderSelectorPtr()
-                        ->getRankedFrameRates(mPolicy.contentRequirements, makeGlobalSignals())
-                        .ranking;
+    const auto frameRateMode =
+            leaderSelectorPtr()
+                    ->getRankedFrameRates(mPolicy.contentRequirements, makeGlobalSignals())
+                    .ranking.front()
+                    .frameRateMode;
 
-        mPolicy.modeOpt = ranking.front().frameRateMode;
-    }
-    return mPolicy.modeOpt;
+    // Make sure the stored mode is up to date.
+    mPolicy.modeOpt = frameRateMode;
+
+    return frameRateMode;
 }
 
 void Scheduler::onNewVsyncPeriodChangeTimeline(const hal::VsyncPeriodChangeTimeline& timeline) {
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index cf2ffb8..f189426 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -209,8 +209,8 @@
     void dump(ConnectionHandle, std::string&) const;
     void dumpVsync(std::string&) const;
 
-    // Get the appropriate refresh for current conditions.
-    ftl::Optional<FrameRateMode> getPreferredDisplayMode();
+    // Returns the preferred refresh rate and frame rate for the leader display.
+    FrameRateMode getPreferredDisplayMode();
 
     // Notifies the scheduler about a refresh rate timeline change.
     void onNewVsyncPeriodChangeTimeline(const hal::VsyncPeriodChangeTimeline& timeline);
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index cc4e082..3dd86aa 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -112,6 +112,7 @@
 #include <ui/DisplayIdentification.h>
 #include "BackgroundExecutor.h"
 #include "Client.h"
+#include "ClientCache.h"
 #include "Colorizer.h"
 #include "Display/DisplayMap.h"
 #include "DisplayDevice.h"
@@ -298,6 +299,7 @@
 const String16 sDump("android.permission.DUMP");
 const String16 sCaptureBlackoutContent("android.permission.CAPTURE_BLACKOUT_CONTENT");
 const String16 sInternalSystemWindow("android.permission.INTERNAL_SYSTEM_WINDOW");
+const String16 sWakeupSurfaceFlinger("android.permission.WAKEUP_SURFACE_FLINGER");
 
 const char* KERNEL_IDLE_TIMER_PROP = "graphics.display.kernel_idle_timer.enabled";
 
@@ -331,20 +333,12 @@
     }
 }
 
-bool callingThreadHasRotateSurfaceFlingerAccess() {
+bool callingThreadHasPermission(const String16& permission) {
     IPCThreadState* ipc = IPCThreadState::self();
     const int pid = ipc->getCallingPid();
     const int uid = ipc->getCallingUid();
     return uid == AID_GRAPHICS || uid == AID_SYSTEM ||
-            PermissionCache::checkPermission(sRotateSurfaceFlinger, pid, uid);
-}
-
-bool callingThreadHasInternalSystemWindowAccess() {
-    IPCThreadState* ipc = IPCThreadState::self();
-    const int pid = ipc->getCallingPid();
-    const int uid = ipc->getCallingUid();
-    return uid == AID_GRAPHICS || uid == AID_SYSTEM ||
-        PermissionCache::checkPermission(sInternalSystemWindow, pid, uid);
+            PermissionCache::checkPermission(permission, pid, uid);
 }
 
 SurfaceFlinger::SurfaceFlinger(Factory& factory, SkipInitializationTag)
@@ -425,8 +419,6 @@
     bool supportsBlurs = atoi(value);
     mSupportsBlur = supportsBlurs;
     ALOGI_IF(!mSupportsBlur, "Disabling blur effects, they are not supported.");
-    property_get("ro.sf.blurs_are_expensive", value, "0");
-    mBlursAreExpensive = atoi(value);
 
     const size_t defaultListSize = MAX_LAYERS;
     auto listSize = property_get_int32("debug.sf.max_igbp_list_size", int32_t(defaultListSize));
@@ -448,6 +440,9 @@
     property_get("debug.sf.treat_170m_as_sRGB", value, "0");
     mTreat170mAsSrgb = atoi(value);
 
+    mIgnoreHwcPhysicalDisplayOrientation =
+            base::GetBoolProperty("debug.sf.ignore_hwc_physical_display_orientation"s, false);
+
     // We should be reading 'persist.sys.sf.color_saturation' here
     // but since /data may be encrypted, we need to wait until after vold
     // comes online to attempt to read the property. The property is
@@ -974,17 +969,14 @@
     return NO_ERROR;
 }
 
-status_t SurfaceFlinger::getStaticDisplayInfo(const sp<IBinder>& displayToken,
-                                              ui::StaticDisplayInfo* info) {
-    if (!displayToken || !info) {
+status_t SurfaceFlinger::getStaticDisplayInfo(int64_t displayId, ui::StaticDisplayInfo* info) {
+    if (!info) {
         return BAD_VALUE;
     }
 
     Mutex::Autolock lock(mStateLock);
-
-    const auto displayOpt = ftl::find_if(mPhysicalDisplays, PhysicalDisplay::hasToken(displayToken))
-                                    .transform(&ftl::to_mapped_ref<PhysicalDisplays>)
-                                    .and_then(getDisplayDeviceAndSnapshot());
+    const auto id = DisplayId::fromValue<PhysicalDisplayId>(static_cast<uint64_t>(displayId));
+    const auto displayOpt = mPhysicalDisplays.get(*id).and_then(getDisplayDeviceAndSnapshot());
 
     if (!displayOpt) {
         return NAME_NOT_FOUND;
@@ -1011,26 +1003,10 @@
     return NO_ERROR;
 }
 
-status_t SurfaceFlinger::getDynamicDisplayInfo(const sp<IBinder>& displayToken,
-                                               ui::DynamicDisplayInfo* info) {
-    if (!displayToken || !info) {
-        return BAD_VALUE;
-    }
-
-    Mutex::Autolock lock(mStateLock);
-
-    const auto displayOpt = ftl::find_if(mPhysicalDisplays, PhysicalDisplay::hasToken(displayToken))
-                                    .transform(&ftl::to_mapped_ref<PhysicalDisplays>)
-                                    .and_then(getDisplayDeviceAndSnapshot());
-    if (!displayOpt) {
-        return NAME_NOT_FOUND;
-    }
-
-    const auto& [display, snapshotRef] = *displayOpt;
-    const auto& snapshot = snapshotRef.get();
-
+void SurfaceFlinger::getDynamicDisplayInfoInternal(ui::DynamicDisplayInfo*& info,
+                                                   const sp<DisplayDevice>& display,
+                                                   const display::DisplaySnapshot& snapshot) {
     const auto& displayModes = snapshot.displayModes();
-
     info->supportedDisplayModes.clear();
     info->supportedDisplayModes.reserve(displayModes.size());
 
@@ -1104,7 +1080,47 @@
             }
         }
     }
+}
 
+status_t SurfaceFlinger::getDynamicDisplayInfoFromId(int64_t physicalDisplayId,
+                                                     ui::DynamicDisplayInfo* info) {
+    if (!info) {
+        return BAD_VALUE;
+    }
+
+    Mutex::Autolock lock(mStateLock);
+
+    const auto id_ =
+            DisplayId::fromValue<PhysicalDisplayId>(static_cast<uint64_t>(physicalDisplayId));
+    const auto displayOpt = mPhysicalDisplays.get(*id_).and_then(getDisplayDeviceAndSnapshot());
+
+    if (!displayOpt) {
+        return NAME_NOT_FOUND;
+    }
+
+    const auto& [display, snapshotRef] = *displayOpt;
+    getDynamicDisplayInfoInternal(info, display, snapshotRef.get());
+    return NO_ERROR;
+}
+
+status_t SurfaceFlinger::getDynamicDisplayInfoFromToken(const sp<IBinder>& displayToken,
+                                                        ui::DynamicDisplayInfo* info) {
+    if (!displayToken || !info) {
+        return BAD_VALUE;
+    }
+
+    Mutex::Autolock lock(mStateLock);
+
+    const auto displayOpt = ftl::find_if(mPhysicalDisplays, PhysicalDisplay::hasToken(displayToken))
+                                    .transform(&ftl::to_mapped_ref<PhysicalDisplays>)
+                                    .and_then(getDisplayDeviceAndSnapshot());
+
+    if (!displayOpt) {
+        return NAME_NOT_FOUND;
+    }
+
+    const auto& [display, snapshotRef] = *displayOpt;
+    getDynamicDisplayInfoInternal(info, display, snapshotRef.get());
     return NO_ERROR;
 }
 
@@ -1119,7 +1135,7 @@
     return NO_ERROR;
 }
 
-void SurfaceFlinger::setDesiredActiveMode(display::DisplayModeRequest&& request) {
+void SurfaceFlinger::setDesiredActiveMode(display::DisplayModeRequest&& request, bool force) {
     ATRACE_CALL();
 
     auto display = getDisplayDeviceLocked(request.mode.modePtr->getPhysicalDisplayId());
@@ -1131,7 +1147,8 @@
     const auto mode = request.mode;
     const bool emitEvent = request.emitEvent;
 
-    switch (display->setDesiredActiveMode(DisplayDevice::ActiveModeInfo(std::move(request)))) {
+    switch (display->setDesiredActiveMode(DisplayDevice::ActiveModeInfo(std::move(request)),
+                                          force)) {
         case DisplayDevice::DesiredActiveModeAction::InitiateDisplayModeSwitch:
             scheduleComposite(FrameHint::kNone);
 
@@ -1558,7 +1575,8 @@
     return NO_ERROR;
 }
 
-status_t SurfaceFlinger::onPullAtom(const int32_t atomId, std::string* pulledData, bool* success) {
+status_t SurfaceFlinger::onPullAtom(const int32_t atomId, std::vector<uint8_t>* pulledData,
+                                    bool* success) {
     *success = mTimeStats->onPullAtom(atomId, pulledData);
     return NO_ERROR;
 }
@@ -2257,6 +2275,8 @@
         });
     }
 
+    refreshArgs.bufferIdsToUncache = std::move(mBufferIdsToUncache);
+
     refreshArgs.layersWithQueuedFrames.reserve(mLayersWithQueuedFrames.size());
     for (auto layer : mLayersWithQueuedFrames) {
         if (auto layerFE = layer->getCompositionEngineLayerFE())
@@ -2280,7 +2300,6 @@
             layers.push_back(layer);
         }
     });
-    refreshArgs.blursAreExpensive = mBlursAreExpensive;
     refreshArgs.internalDisplayRotationFlags = DisplayDevice::getPrimaryDisplayRotationFlags();
 
     if (CC_UNLIKELY(mDrawingState.colorMatrixChanged)) {
@@ -2426,7 +2445,8 @@
     if (!id) {
         return ui::ROTATION_0;
     }
-    if (getHwComposer().getComposer()->isSupported(
+    if (!mIgnoreHwcPhysicalDisplayOrientation &&
+        getHwComposer().getComposer()->isSupported(
                 Hwc2::Composer::OptionalFeature::PhysicalDisplayOrientation)) {
         switch (getHwComposer().getPhysicalDisplayOrientation(*id)) {
             case Hwc2::AidlTransform::ROT_90:
@@ -3442,10 +3462,21 @@
 
     for (auto& request : modeRequests) {
         const auto& modePtr = request.mode.modePtr;
-        const auto display = getDisplayDeviceLocked(modePtr->getPhysicalDisplayId());
+
+        const auto displayId = modePtr->getPhysicalDisplayId();
+        const auto display = getDisplayDeviceLocked(displayId);
 
         if (!display) continue;
 
+        const bool isInternalDisplay = mPhysicalDisplays.get(displayId)
+                                               .transform(&PhysicalDisplay::isInternal)
+                                               .value_or(false);
+
+        if (isInternalDisplay && displayId != mActiveDisplayId) {
+            ALOGV("%s(%s): Inactive display", __func__, to_string(displayId).c_str());
+            continue;
+        }
+
         if (display->refreshRateSelector().isModeAllowed(request.mode)) {
             setDesiredActiveMode(std::move(request));
         } else {
@@ -3967,18 +3998,23 @@
     // Avoid checking for rotation permissions if the caller already has ACCESS_SURFACE_FLINGER
     // permissions.
     if ((permissions & layer_state_t::Permission::ACCESS_SURFACE_FLINGER) ||
-        callingThreadHasRotateSurfaceFlingerAccess()) {
+        callingThreadHasPermission(sRotateSurfaceFlinger)) {
         permissions |= layer_state_t::Permission::ROTATE_SURFACE_FLINGER;
     }
 
-    if (callingThreadHasInternalSystemWindowAccess()) {
+    if (callingThreadHasPermission(sInternalSystemWindow)) {
         permissions |= layer_state_t::Permission::INTERNAL_SYSTEM_WINDOW;
     }
 
-    if (!(permissions & layer_state_t::Permission::ACCESS_SURFACE_FLINGER) &&
-        (flags & (eEarlyWakeupStart | eEarlyWakeupEnd))) {
-        ALOGE("Only WindowManager is allowed to use eEarlyWakeup[Start|End] flags");
-        flags &= ~(eEarlyWakeupStart | eEarlyWakeupEnd);
+    if (flags & (eEarlyWakeupStart | eEarlyWakeupEnd)) {
+        const bool hasPermission =
+                (permissions & layer_state_t::Permission::ACCESS_SURFACE_FLINGER) ||
+                callingThreadHasPermission(sWakeupSurfaceFlinger);
+        if (!hasPermission) {
+            ALOGE("Caller needs permission android.permission.WAKEUP_SURFACE_FLINGER to use "
+                  "eEarlyWakeup[Start|End] flags");
+            flags &= ~(eEarlyWakeupStart | eEarlyWakeupEnd);
+        }
     }
 
     const int64_t postTime = systemTime();
@@ -4001,10 +4037,6 @@
                     getExternalTextureFromBufferData(*resolvedState.state.bufferData,
                                                      layerName.c_str(), transactionId);
             mBufferCountTracker.increment(resolvedState.state.surface->localBinder());
-            if (layer) {
-                resolvedState.hwcBufferSlot =
-                        layer->getHwcCacheSlot(resolvedState.state.bufferData->cachedBuffer);
-            }
         }
     }
 
@@ -4036,7 +4068,7 @@
 
 bool SurfaceFlinger::applyTransactionState(const FrameTimelineInfo& frameTimelineInfo,
                                            std::vector<ResolvedComposerState>& states,
-                                           const Vector<DisplayState>& displays, uint32_t flags,
+                                           Vector<DisplayState>& displays, uint32_t flags,
                                            const InputWindowCommands& inputWindowCommands,
                                            const int64_t desiredPresentTime, bool isAutoTimestamp,
                                            const client_cache_t& uncacheBuffer,
@@ -4045,7 +4077,8 @@
                                            const std::vector<ListenerCallbacks>& listenerCallbacks,
                                            int originPid, int originUid, uint64_t transactionId) {
     uint32_t transactionFlags = 0;
-    for (const DisplayState& display : displays) {
+    for (DisplayState& display : displays) {
+        display.sanitize(permissions);
         transactionFlags |= setDisplayStateLocked(display);
     }
 
@@ -4080,7 +4113,10 @@
     }
 
     if (uncacheBuffer.isValid()) {
-        ClientCache::getInstance().erase(uncacheBuffer);
+        sp<GraphicBuffer> buffer = ClientCache::getInstance().erase(uncacheBuffer);
+        if (buffer != nullptr) {
+            mBufferIdsToUncache.push_back(buffer->getId());
+        }
     }
 
     // If a synchronous transaction is explicitly requested without any changes, force a transaction
@@ -4471,7 +4507,7 @@
     if (what & layer_state_t::eBufferChanged) {
         if (layer->setBuffer(composerState.externalTexture, *s.bufferData, postTime,
                              desiredPresentTime, isAutoTimestamp, dequeueBufferTimestamp,
-                             frameTimelineInfo, composerState.hwcBufferSlot)) {
+                             frameTimelineInfo)) {
             flags |= eTraversalNeeded;
         }
     } else if (frameTimelineInfo.vsyncId != FrameTimelineInfo::INVALID_VSYNC_ID) {
@@ -4731,19 +4767,34 @@
                                            .value_or(false);
 
     const auto activeDisplay = getDisplayDeviceLocked(mActiveDisplayId);
-    if (isInternalDisplay && activeDisplay != display && activeDisplay &&
-        activeDisplay->isPoweredOn()) {
-        ALOGW("Trying to change power mode on non active display while the active display is ON");
-    }
+
+    ALOGW_IF(display != activeDisplay && isInternalDisplay && activeDisplay &&
+                     activeDisplay->isPoweredOn(),
+             "Trying to change power mode on inactive display without powering off active display");
 
     display->setPowerMode(mode);
 
     const auto refreshRate = display->refreshRateSelector().getActiveMode().modePtr->getFps();
     if (!currentModeOpt || *currentModeOpt == hal::PowerMode::OFF) {
         // Turn on the display
-        if (isInternalDisplay && (!activeDisplay || !activeDisplay->isPoweredOn())) {
-            onActiveDisplayChangedLocked(display);
+
+        // Activate the display (which involves a modeset to the active mode):
+        //     1) When the first (a.k.a. primary) display is powered on during boot.
+        //     2) When the inner or outer display of a foldable is powered on. This condition relies
+        //        on the above DisplayDevice::setPowerMode. If `display` and `activeDisplay` are the
+        //        same display, then the `activeDisplay->isPoweredOn()` below is true, such that the
+        //        display is not activated every time it is powered on.
+        //
+        // TODO(b/255635821): Remove the concept of active display.
+        const bool activeDisplayChanged =
+                isInternalDisplay && (!activeDisplay || !activeDisplay->isPoweredOn());
+
+        static bool sPrimaryDisplay = true;
+        if (sPrimaryDisplay || activeDisplayChanged) {
+            onActiveDisplayChangedLocked(activeDisplay, display);
+            sPrimaryDisplay = false;
         }
+
         // Keep uclamp in a separate syscall and set it before changing to RT due to b/190237315.
         // We can merge the syscall later.
         if (SurfaceFlinger::setSchedAttr(true) != NO_ERROR) {
@@ -5196,7 +5247,7 @@
         std::string result;
         for (Layer* offscreenLayer : mOffscreenLayers) {
             offscreenLayer->traverse(LayerVector::StateSet::Drawing,
-                                     [&](Layer* layer) { layer->dumpCallingUidPid(result); });
+                                     [&](Layer* layer) { layer->dumpOffscreenDebugInfo(result); });
         }
         return result;
     });
@@ -6690,7 +6741,7 @@
 ftl::Optional<scheduler::FrameRateMode> SurfaceFlinger::getPreferredDisplayMode(
         PhysicalDisplayId displayId, DisplayModeId defaultModeId) const {
     if (const auto schedulerMode = mScheduler->getPreferredDisplayMode();
-        schedulerMode && schedulerMode->modePtr->getPhysicalDisplayId() == displayId) {
+        schedulerMode.modePtr->getPhysicalDisplayId() == displayId) {
         return schedulerMode;
     }
 
@@ -6725,12 +6776,24 @@
         case SetPolicyResult::Unchanged:
             return NO_ERROR;
         case SetPolicyResult::Changed:
-            return applyRefreshRateSelectorPolicy(displayId, selector);
+            break;
     }
+
+    const bool isInternalDisplay = mPhysicalDisplays.get(displayId)
+                                           .transform(&PhysicalDisplay::isInternal)
+                                           .value_or(false);
+
+    if (isInternalDisplay && displayId != mActiveDisplayId) {
+        // The policy will be be applied when the display becomes active.
+        ALOGV("%s(%s): Inactive display", __func__, to_string(displayId).c_str());
+        return NO_ERROR;
+    }
+
+    return applyRefreshRateSelectorPolicy(displayId, selector);
 }
 
 status_t SurfaceFlinger::applyRefreshRateSelectorPolicy(
-        PhysicalDisplayId displayId, const scheduler::RefreshRateSelector& selector) {
+        PhysicalDisplayId displayId, const scheduler::RefreshRateSelector& selector, bool force) {
     const scheduler::RefreshRateSelector::Policy currentPolicy = selector.getCurrentPolicy();
     ALOGV("Setting desired display mode specs: %s", currentPolicy.toString().c_str());
 
@@ -6760,7 +6823,7 @@
         return INVALID_OPERATION;
     }
 
-    setDesiredActiveMode({std::move(preferredMode), .emitEvent = true});
+    setDesiredActiveMode({std::move(preferredMode), .emitEvent = true}, force);
     return NO_ERROR;
 }
 
@@ -7042,17 +7105,14 @@
     getRenderEngine().onActiveDisplaySizeChanged(activeDisplay->getSize());
 }
 
-void SurfaceFlinger::onActiveDisplayChangedLocked(const sp<DisplayDevice>& activeDisplay) {
+void SurfaceFlinger::onActiveDisplayChangedLocked(const sp<DisplayDevice>& inactiveDisplay,
+                                                  const sp<DisplayDevice>& activeDisplay) {
     ATRACE_CALL();
 
-    if (const auto display = getDisplayDeviceLocked(mActiveDisplayId)) {
-        display->getCompositionDisplay()->setLayerCachingTexturePoolEnabled(false);
+    if (inactiveDisplay) {
+        inactiveDisplay->getCompositionDisplay()->setLayerCachingTexturePoolEnabled(false);
     }
 
-    if (!activeDisplay) {
-        ALOGE("%s: activeDisplay is null", __func__);
-        return;
-    }
     mActiveDisplayId = activeDisplay->getPhysicalId();
     activeDisplay->getCompositionDisplay()->setLayerCachingTexturePoolEnabled(true);
 
@@ -7067,7 +7127,8 @@
     // case, its preferred mode has not been propagated to HWC (via setDesiredActiveMode). In either
     // case, the Scheduler's cachedModeChangedParams must be initialized to the newly active mode,
     // and the kernel idle timer of the newly active display must be toggled.
-    applyRefreshRateSelectorPolicy(mActiveDisplayId, activeDisplay->refreshRateSelector());
+    constexpr bool kForce = true;
+    applyRefreshRateSelectorPolicy(mActiveDisplayId, activeDisplay->refreshRateSelector(), kForce);
 }
 
 status_t SurfaceFlinger::addWindowInfosListener(
@@ -7093,8 +7154,7 @@
                                    layerName, static_cast<uint32_t>(mMaxRenderTargetSize));
         ALOGD("%s", errorMessage.c_str());
         if (bufferData.releaseBufferListener) {
-            bufferData.releaseBufferListener->onTransactionQueueStalled(
-                    String8(errorMessage.c_str()));
+            bufferData.releaseBufferListener->onTransactionQueueStalled(errorMessage);
         }
         return nullptr;
     }
@@ -7112,7 +7172,7 @@
 
             if (bufferData.releaseBufferListener) {
                 bufferData.releaseBufferListener->onTransactionQueueStalled(
-                        String8("Buffer processing hung due to full buffer cache"));
+                        "Buffer processing hung due to full buffer cache");
             }
         }
 
@@ -7286,6 +7346,10 @@
 
 binder::Status SurfaceComposerAIDL::getPhysicalDisplayToken(int64_t displayId,
                                                             sp<IBinder>* outDisplay) {
+    status_t status = checkAccessPermission();
+    if (status != OK) {
+        return binderStatusFromStatusT(status);
+    }
     const auto id = DisplayId::fromValue<PhysicalDisplayId>(static_cast<uint64_t>(displayId));
     *outDisplay = mFlinger->getPhysicalDisplayToken(*id);
     return binder::Status::ok();
@@ -7336,11 +7400,12 @@
     return binderStatusFromStatusT(status);
 }
 
-binder::Status SurfaceComposerAIDL::getStaticDisplayInfo(const sp<IBinder>& display,
+binder::Status SurfaceComposerAIDL::getStaticDisplayInfo(int64_t displayId,
                                                          gui::StaticDisplayInfo* outInfo) {
     using Tag = gui::DeviceProductInfo::ManufactureOrModelDate::Tag;
     ui::StaticDisplayInfo info;
-    status_t status = mFlinger->getStaticDisplayInfo(display, &info);
+
+    status_t status = mFlinger->getStaticDisplayInfo(displayId, &info);
     if (status == NO_ERROR) {
         // convert ui::StaticDisplayInfo to gui::StaticDisplayInfo
         outInfo->connectionType = static_cast<gui::DisplayConnectionType>(info.connectionType);
@@ -7379,58 +7444,71 @@
     return binderStatusFromStatusT(status);
 }
 
-binder::Status SurfaceComposerAIDL::getDynamicDisplayInfo(const sp<IBinder>& display,
-                                                          gui::DynamicDisplayInfo* outInfo) {
+void SurfaceComposerAIDL::getDynamicDisplayInfoInternal(ui::DynamicDisplayInfo& info,
+                                                        gui::DynamicDisplayInfo*& outInfo) {
+    // convert ui::DynamicDisplayInfo to gui::DynamicDisplayInfo
+    outInfo->supportedDisplayModes.clear();
+    outInfo->supportedDisplayModes.reserve(info.supportedDisplayModes.size());
+    for (const auto& mode : info.supportedDisplayModes) {
+        gui::DisplayMode outMode;
+        outMode.id = mode.id;
+        outMode.resolution.width = mode.resolution.width;
+        outMode.resolution.height = mode.resolution.height;
+        outMode.xDpi = mode.xDpi;
+        outMode.yDpi = mode.yDpi;
+        outMode.refreshRate = mode.refreshRate;
+        outMode.appVsyncOffset = mode.appVsyncOffset;
+        outMode.sfVsyncOffset = mode.sfVsyncOffset;
+        outMode.presentationDeadline = mode.presentationDeadline;
+        outMode.group = mode.group;
+        std::transform(mode.supportedHdrTypes.begin(), mode.supportedHdrTypes.end(),
+                       std::back_inserter(outMode.supportedHdrTypes),
+                       [](const ui::Hdr& value) { return static_cast<int32_t>(value); });
+        outInfo->supportedDisplayModes.push_back(outMode);
+    }
+
+    outInfo->activeDisplayModeId = info.activeDisplayModeId;
+    outInfo->renderFrameRate = info.renderFrameRate;
+
+    outInfo->supportedColorModes.clear();
+    outInfo->supportedColorModes.reserve(info.supportedColorModes.size());
+    for (const auto& cmode : info.supportedColorModes) {
+        outInfo->supportedColorModes.push_back(static_cast<int32_t>(cmode));
+    }
+
+    outInfo->activeColorMode = static_cast<int32_t>(info.activeColorMode);
+
+    gui::HdrCapabilities& hdrCapabilities = outInfo->hdrCapabilities;
+    hdrCapabilities.supportedHdrTypes.clear();
+    hdrCapabilities.supportedHdrTypes.reserve(info.hdrCapabilities.getSupportedHdrTypes().size());
+    for (const auto& hdr : info.hdrCapabilities.getSupportedHdrTypes()) {
+        hdrCapabilities.supportedHdrTypes.push_back(static_cast<int32_t>(hdr));
+    }
+    hdrCapabilities.maxLuminance = info.hdrCapabilities.getDesiredMaxLuminance();
+    hdrCapabilities.maxAverageLuminance = info.hdrCapabilities.getDesiredMaxAverageLuminance();
+    hdrCapabilities.minLuminance = info.hdrCapabilities.getDesiredMinLuminance();
+
+    outInfo->autoLowLatencyModeSupported = info.autoLowLatencyModeSupported;
+    outInfo->gameContentTypeSupported = info.gameContentTypeSupported;
+    outInfo->preferredBootDisplayMode = info.preferredBootDisplayMode;
+}
+
+binder::Status SurfaceComposerAIDL::getDynamicDisplayInfoFromToken(
+        const sp<IBinder>& display, gui::DynamicDisplayInfo* outInfo) {
     ui::DynamicDisplayInfo info;
-    status_t status = mFlinger->getDynamicDisplayInfo(display, &info);
+    status_t status = mFlinger->getDynamicDisplayInfoFromToken(display, &info);
     if (status == NO_ERROR) {
-        // convert ui::DynamicDisplayInfo to gui::DynamicDisplayInfo
-        outInfo->supportedDisplayModes.clear();
-        outInfo->supportedDisplayModes.reserve(info.supportedDisplayModes.size());
-        for (const auto& mode : info.supportedDisplayModes) {
-            gui::DisplayMode outMode;
-            outMode.id = mode.id;
-            outMode.resolution.width = mode.resolution.width;
-            outMode.resolution.height = mode.resolution.height;
-            outMode.xDpi = mode.xDpi;
-            outMode.yDpi = mode.yDpi;
-            outMode.refreshRate = mode.refreshRate;
-            outMode.appVsyncOffset = mode.appVsyncOffset;
-            outMode.sfVsyncOffset = mode.sfVsyncOffset;
-            outMode.presentationDeadline = mode.presentationDeadline;
-            outMode.group = mode.group;
-            std::transform(mode.supportedHdrTypes.begin(), mode.supportedHdrTypes.end(),
-                           std::back_inserter(outMode.supportedHdrTypes),
-                           [](const ui::Hdr& value) { return static_cast<int32_t>(value); });
+        getDynamicDisplayInfoInternal(info, outInfo);
+    }
+    return binderStatusFromStatusT(status);
+}
 
-            outInfo->supportedDisplayModes.push_back(outMode);
-        }
-
-        outInfo->activeDisplayModeId = info.activeDisplayModeId;
-        outInfo->renderFrameRate = info.renderFrameRate;
-
-        outInfo->supportedColorModes.clear();
-        outInfo->supportedColorModes.reserve(info.supportedColorModes.size());
-        for (const auto& cmode : info.supportedColorModes) {
-            outInfo->supportedColorModes.push_back(static_cast<int32_t>(cmode));
-        }
-
-        outInfo->activeColorMode = static_cast<int32_t>(info.activeColorMode);
-
-        gui::HdrCapabilities& hdrCapabilities = outInfo->hdrCapabilities;
-        hdrCapabilities.supportedHdrTypes.clear();
-        hdrCapabilities.supportedHdrTypes.reserve(
-                info.hdrCapabilities.getSupportedHdrTypes().size());
-        for (const auto& hdr : info.hdrCapabilities.getSupportedHdrTypes()) {
-            hdrCapabilities.supportedHdrTypes.push_back(static_cast<int32_t>(hdr));
-        }
-        hdrCapabilities.maxLuminance = info.hdrCapabilities.getDesiredMaxLuminance();
-        hdrCapabilities.maxAverageLuminance = info.hdrCapabilities.getDesiredMaxAverageLuminance();
-        hdrCapabilities.minLuminance = info.hdrCapabilities.getDesiredMinLuminance();
-
-        outInfo->autoLowLatencyModeSupported = info.autoLowLatencyModeSupported;
-        outInfo->gameContentTypeSupported = info.gameContentTypeSupported;
-        outInfo->preferredBootDisplayMode = info.preferredBootDisplayMode;
+binder::Status SurfaceComposerAIDL::getDynamicDisplayInfoFromId(int64_t displayId,
+                                                                gui::DynamicDisplayInfo* outInfo) {
+    ui::DynamicDisplayInfo info;
+    status_t status = mFlinger->getDynamicDisplayInfoFromId(displayId, &info);
+    if (status == NO_ERROR) {
+        getDynamicDisplayInfoInternal(info, outInfo);
     }
     return binderStatusFromStatusT(status);
 }
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index b9903a7..23ac19e 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -26,6 +26,7 @@
 #include <android/gui/DisplayStatInfo.h>
 #include <android/gui/DisplayState.h>
 #include <android/gui/ISurfaceComposerClient.h>
+#include <android/gui/ITransactionCompletedListener.h>
 #include <cutils/atomic.h>
 #include <cutils/compiler.h>
 #include <ftl/future.h>
@@ -34,8 +35,8 @@
 #include <gui/CompositorTiming.h>
 #include <gui/FrameTimestamps.h>
 #include <gui/ISurfaceComposer.h>
-#include <gui/ITransactionCompletedListener.h>
 #include <gui/LayerDebugInfo.h>
+
 #include <gui/LayerState.h>
 #include <layerproto/LayerProtoHeader.h>
 #include <math/mat4.h>
@@ -96,6 +97,7 @@
 #include <unordered_map>
 #include <unordered_set>
 #include <utility>
+#include <vector>
 
 #include <aidl/android/hardware/graphics/common/DisplayDecorationSupport.h>
 #include "Client.h"
@@ -125,7 +127,9 @@
 using gui::CaptureArgs;
 using gui::DisplayCaptureArgs;
 using gui::IRegionSamplingListener;
+using gui::ITransactionCompletedListener;
 using gui::LayerCaptureArgs;
+
 using gui::ScreenCaptureResults;
 
 namespace frametimeline {
@@ -307,6 +311,11 @@
     // on this behavior to increase contrast for some media sources.
     bool mTreat170mAsSrgb = false;
 
+    // Allows to ignore physical orientation provided through hwc API in favour of
+    // 'ro.surface_flinger.primary_display_orientation'.
+    // TODO(b/246793311): Clean up a temporary property
+    bool mIgnoreHwcPhysicalDisplayOrientation = false;
+
 protected:
     // We're reference counted, never destroy SurfaceFlinger directly
     virtual ~SurfaceFlinger();
@@ -512,10 +521,13 @@
     status_t getDisplayStats(const sp<IBinder>& displayToken, DisplayStatInfo* stats);
     status_t getDisplayState(const sp<IBinder>& displayToken, ui::DisplayState*)
             EXCLUDES(mStateLock);
-    status_t getStaticDisplayInfo(const sp<IBinder>& displayToken, ui::StaticDisplayInfo*)
+    status_t getStaticDisplayInfo(int64_t displayId, ui::StaticDisplayInfo*) EXCLUDES(mStateLock);
+    status_t getDynamicDisplayInfoFromId(int64_t displayId, ui::DynamicDisplayInfo*)
             EXCLUDES(mStateLock);
-    status_t getDynamicDisplayInfo(const sp<IBinder>& displayToken, ui::DynamicDisplayInfo*)
-            EXCLUDES(mStateLock);
+    status_t getDynamicDisplayInfoFromToken(const sp<IBinder>& displayToken,
+                                            ui::DynamicDisplayInfo*) EXCLUDES(mStateLock);
+    void getDynamicDisplayInfoInternal(ui::DynamicDisplayInfo*&, const sp<DisplayDevice>&,
+                                       const display::DisplaySnapshot&);
     status_t getDisplayNativePrimaries(const sp<IBinder>& displayToken, ui::DisplayPrimaries&);
     status_t setActiveColorMode(const sp<IBinder>& displayToken, ui::ColorMode colorMode);
     status_t getBootDisplayModeSupport(bool* outSupport) const;
@@ -527,7 +539,7 @@
     void setPowerMode(const sp<IBinder>& displayToken, int mode);
     status_t overrideHdrTypes(const sp<IBinder>& displayToken,
                               const std::vector<ui::Hdr>& hdrTypes);
-    status_t onPullAtom(const int32_t atomId, std::string* pulledData, bool* success);
+    status_t onPullAtom(const int32_t atomId, std::vector<uint8_t>* pulledData, bool* success);
     status_t getLayerDebugInfo(std::vector<gui::LayerDebugInfo>* outLayers);
     status_t getColorManagement(bool* outGetColorManagement) const;
     status_t getCompositionPreference(ui::Dataspace* outDataspace, ui::PixelFormat* outPixelFormat,
@@ -642,7 +654,8 @@
     // Show render rate with refresh rate overlay
     bool mRefreshRateOverlayRenderRate = false;
 
-    void setDesiredActiveMode(display::DisplayModeRequest&&) REQUIRES(mStateLock);
+    void setDesiredActiveMode(display::DisplayModeRequest&&, bool force = false)
+            REQUIRES(mStateLock);
 
     status_t setActiveModeFromBackdoor(const sp<display::DisplayToken>&, DisplayModeId);
     // Sets the active mode and a new refresh rate in SF.
@@ -671,7 +684,8 @@
 
     // TODO(b/241285191): Look up RefreshRateSelector on Scheduler to remove redundant parameter.
     status_t applyRefreshRateSelectorPolicy(PhysicalDisplayId,
-                                            const scheduler::RefreshRateSelector&)
+                                            const scheduler::RefreshRateSelector&,
+                                            bool force = false)
             REQUIRES(mStateLock, kMainThreadContext);
 
     void commitTransactions() EXCLUDES(mStateLock) REQUIRES(kMainThreadContext);
@@ -702,7 +716,7 @@
      */
     bool applyTransactionState(const FrameTimelineInfo& info,
                                std::vector<ResolvedComposerState>& state,
-                               const Vector<DisplayState>& displays, uint32_t flags,
+                               Vector<DisplayState>& displays, uint32_t flags,
                                const InputWindowCommands& inputWindowCommands,
                                const int64_t desiredPresentTime, bool isAutoTimestamp,
                                const client_cache_t& uncacheBuffer, const int64_t postTime,
@@ -1002,7 +1016,10 @@
     VirtualDisplayId acquireVirtualDisplay(ui::Size, ui::PixelFormat) REQUIRES(mStateLock);
     void releaseVirtualDisplay(VirtualDisplayId);
 
-    void onActiveDisplayChangedLocked(const sp<DisplayDevice>& activeDisplay)
+    // TODO(b/255635821): Replace pointers with references. `inactiveDisplay` is only ever `nullptr`
+    // in tests, and `activeDisplay` must not be `nullptr` as a precondition.
+    void onActiveDisplayChangedLocked(const sp<DisplayDevice>& inactiveDisplay,
+                                      const sp<DisplayDevice>& activeDisplay)
             REQUIRES(mStateLock, kMainThreadContext);
 
     void onActiveDisplaySizeChanged(const sp<const DisplayDevice>&);
@@ -1091,6 +1108,10 @@
     std::atomic<uint32_t> mUniqueTransactionId = 1;
     SortedVector<sp<Layer>> mLayersPendingRemoval;
 
+    // Buffers that have been discarded by clients and need to be evicted from per-layer caches so
+    // the graphics memory can be immediately freed.
+    std::vector<uint64_t> mBufferIdsToUncache;
+
     // global color transform states
     Daltonizer mDaltonizer;
     float mGlobalSaturationFactor = 1.0f;
@@ -1173,7 +1194,9 @@
     display::PhysicalDisplays mPhysicalDisplays GUARDED_BY(mStateLock);
 
     // The inner or outer display for foldables, assuming they have mutually exclusive power states.
-    PhysicalDisplayId mActiveDisplayId GUARDED_BY(mStateLock);
+    // Atomic because writes from onActiveDisplayChangedLocked are not always under mStateLock, but
+    // reads from ISchedulerCallback::requestDisplayModes may happen concurrently.
+    std::atomic<PhysicalDisplayId> mActiveDisplayId GUARDED_BY(mStateLock);
 
     struct {
         DisplayIdGenerator<GpuVirtualDisplayId> gpu;
@@ -1203,8 +1226,6 @@
 
     // If blurs should be enabled on this device.
     bool mSupportsBlur = false;
-    // If blurs are considered expensive and should require high GPU frequency.
-    bool mBlursAreExpensive = false;
     std::atomic<uint32_t> mFrameMissedCount = 0;
     std::atomic<uint32_t> mHwcFrameMissedCount = 0;
     std::atomic<uint32_t> mGpuFrameMissedCount = 0;
@@ -1398,10 +1419,12 @@
                                    gui::DisplayStatInfo* outStatInfo) override;
     binder::Status getDisplayState(const sp<IBinder>& display,
                                    gui::DisplayState* outState) override;
-    binder::Status getStaticDisplayInfo(const sp<IBinder>& display,
+    binder::Status getStaticDisplayInfo(int64_t displayId,
                                         gui::StaticDisplayInfo* outInfo) override;
-    binder::Status getDynamicDisplayInfo(const sp<IBinder>& display,
-                                         gui::DynamicDisplayInfo* outInfo) override;
+    binder::Status getDynamicDisplayInfoFromId(int64_t displayId,
+                                               gui::DynamicDisplayInfo* outInfo) override;
+    binder::Status getDynamicDisplayInfoFromToken(const sp<IBinder>& display,
+                                                  gui::DynamicDisplayInfo* outInfo) override;
     binder::Status getDisplayNativePrimaries(const sp<IBinder>& display,
                                              gui::DisplayPrimaries* outPrimaries) override;
     binder::Status setActiveColorMode(const sp<IBinder>& display, int colorMode) override;
@@ -1486,6 +1509,8 @@
     status_t checkAccessPermission(bool usePermissionCache = kUsePermissionCache);
     status_t checkControlDisplayBrightnessPermission();
     status_t checkReadFrameBufferPermission();
+    static void getDynamicDisplayInfoInternal(ui::DynamicDisplayInfo& info,
+                                              gui::DynamicDisplayInfo*& outInfo);
 
 private:
     sp<SurfaceFlinger> mFlinger;
diff --git a/services/surfaceflinger/TimeStats/TimeStats.cpp b/services/surfaceflinger/TimeStats/TimeStats.cpp
index e860d88..630cef1 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.cpp
+++ b/services/surfaceflinger/TimeStats/TimeStats.cpp
@@ -27,6 +27,7 @@
 
 #include <algorithm>
 #include <chrono>
+#include <cmath>
 #include <unordered_map>
 
 #include "TimeStats.h"
@@ -90,7 +91,7 @@
 }
 } // namespace
 
-bool TimeStats::populateGlobalAtom(std::string* pulledData) {
+bool TimeStats::populateGlobalAtom(std::vector<uint8_t>* pulledData) {
     std::lock_guard<std::mutex> lock(mMutex);
 
     if (mTimeStats.statsStartLegacy == 0) {
@@ -138,10 +139,11 @@
     // Always clear data.
     clearGlobalLocked();
 
-    return atomList.SerializeToString(pulledData);
+    pulledData->resize(atomList.ByteSizeLong());
+    return atomList.SerializeToArray(pulledData->data(), atomList.ByteSizeLong());
 }
 
-bool TimeStats::populateLayerAtom(std::string* pulledData) {
+bool TimeStats::populateLayerAtom(std::vector<uint8_t>* pulledData) {
     std::lock_guard<std::mutex> lock(mMutex);
 
     std::vector<TimeStatsHelper::TimeStatsLayer*> dumpStats;
@@ -179,6 +181,12 @@
             *atom->mutable_present_to_present() =
                     histogramToProto(present2PresentHist->second.hist, mMaxPulledHistogramBuckets);
         }
+        const auto& present2PresentDeltaHist = layer->deltas.find("present2presentDelta");
+        if (present2PresentDeltaHist != layer->deltas.cend()) {
+            *atom->mutable_present_to_present_delta() =
+                    histogramToProto(present2PresentDeltaHist->second.hist,
+                                     mMaxPulledHistogramBuckets);
+        }
         const auto& post2presentHist = layer->deltas.find("post2present");
         if (post2presentHist != layer->deltas.cend()) {
             *atom->mutable_post_to_present() =
@@ -229,7 +237,8 @@
     // Always clear data.
     clearLayersLocked();
 
-    return atomList.SerializeToString(pulledData);
+    pulledData->resize(atomList.ByteSizeLong());
+    return atomList.SerializeToArray(pulledData->data(), atomList.ByteSizeLong());
 }
 
 TimeStats::TimeStats() : TimeStats(std::nullopt, std::nullopt) {}
@@ -245,7 +254,7 @@
     }
 }
 
-bool TimeStats::onPullAtom(const int atomId, std::string* pulledData) {
+bool TimeStats::onPullAtom(const int atomId, std::vector<uint8_t>* pulledData) {
     bool success = false;
     if (atomId == 10062) { // SURFACEFLINGER_STATS_GLOBAL_INFO
         success = populateGlobalAtom(pulledData);
@@ -450,6 +459,7 @@
 
     LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     TimeRecord& prevTimeRecord = layerRecord.prevTimeRecord;
+    std::optional<int32_t>& prevPresentToPresentMs = layerRecord.prevPresentToPresentMs;
     std::deque<TimeRecord>& timeRecords = layerRecord.timeRecords;
     const int32_t refreshRateBucket =
             clampToNearestBucket(displayRefreshRate, REFRESH_RATE_BUCKET_WIDTH);
@@ -527,6 +537,12 @@
             ALOGV("[%d]-[%" PRIu64 "]-present2present[%d]", layerId,
                   timeRecords[0].frameTime.frameNumber, presentToPresentMs);
             timeStatsLayer.deltas["present2present"].insert(presentToPresentMs);
+            if (prevPresentToPresentMs) {
+                const int32_t presentToPresentDeltaMs =
+                        std::abs(presentToPresentMs - *prevPresentToPresentMs);
+                timeStatsLayer.deltas["present2presentDelta"].insert(presentToPresentDeltaMs);
+            }
+            prevPresentToPresentMs = presentToPresentMs;
         }
         prevTimeRecord = timeRecords[0];
         timeRecords.pop_front();
diff --git a/services/surfaceflinger/TimeStats/TimeStats.h b/services/surfaceflinger/TimeStats/TimeStats.h
index 61d7c22..5f58657 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.h
+++ b/services/surfaceflinger/TimeStats/TimeStats.h
@@ -47,7 +47,7 @@
     virtual ~TimeStats() = default;
 
     // Process a pull request from statsd.
-    virtual bool onPullAtom(const int atomId, std::string* pulledData) = 0;
+    virtual bool onPullAtom(const int atomId, std::vector<uint8_t>* pulledData) = 0;
 
     virtual void parseArgs(bool asProto, const Vector<String16>& args, std::string& result) = 0;
     virtual bool isEnabled() = 0;
@@ -219,6 +219,7 @@
         uint32_t lateAcquireFrames = 0;
         uint32_t badDesiredPresentFrames = 0;
         TimeRecord prevTimeRecord;
+        std::optional<int32_t> prevPresentToPresentMs;
         std::deque<TimeRecord> timeRecords;
     };
 
@@ -244,7 +245,7 @@
     TimeStats(std::optional<size_t> maxPulledLayers,
               std::optional<size_t> maxPulledHistogramBuckets);
 
-    bool onPullAtom(const int atomId, std::string* pulledData) override;
+    bool onPullAtom(const int atomId, std::vector<uint8_t>* pulledData) override;
     void parseArgs(bool asProto, const Vector<String16>& args, std::string& result) override;
     bool isEnabled() override;
     std::string miniDump() override;
@@ -292,8 +293,8 @@
     static const size_t MAX_NUM_TIME_RECORDS = 64;
 
 private:
-    bool populateGlobalAtom(std::string* pulledData);
-    bool populateLayerAtom(std::string* pulledData);
+    bool populateGlobalAtom(std::vector<uint8_t>* pulledData);
+    bool populateLayerAtom(std::vector<uint8_t>* pulledData);
     bool recordReadyLocked(int32_t layerId, TimeRecord* timeRecord);
     void flushAvailableRecordsToStatsLocked(int32_t layerId, Fps displayRefreshRate,
                                             std::optional<Fps> renderRate, SetFrameRateVote,
diff --git a/services/surfaceflinger/TimeStats/timestatsatomsproto/timestats_atoms.proto b/services/surfaceflinger/TimeStats/timestatsatomsproto/timestats_atoms.proto
index d4d444e..8615947 100644
--- a/services/surfaceflinger/TimeStats/timestatsatomsproto/timestats_atoms.proto
+++ b/services/surfaceflinger/TimeStats/timestatsatomsproto/timestats_atoms.proto
@@ -289,7 +289,11 @@
     // Introduced in Android 12.
     optional FrameTimingHistogram app_deadline_misses = 25;
 
-    // Next ID: 27
+    // Variability histogram of present_to_present timings.
+    // Introduced in Android 14.
+    optional FrameTimingHistogram present_to_present_delta = 27;
+
+    // Next ID: 28
 }
 
 /**
diff --git a/services/surfaceflinger/Tracing/tools/Android.bp b/services/surfaceflinger/Tracing/tools/Android.bp
index e8fe734..b6435a8 100644
--- a/services/surfaceflinger/Tracing/tools/Android.bp
+++ b/services/surfaceflinger/Tracing/tools/Android.bp
@@ -25,8 +25,8 @@
     name: "layertracegenerator",
     defaults: [
         "libsurfaceflinger_mocks_defaults",
+        "librenderengine_deps",
         "surfaceflinger_defaults",
-        "skia_renderengine_deps",
     ],
     srcs: [
         ":libsurfaceflinger_sources",
diff --git a/services/surfaceflinger/TransactionCallbackInvoker.h b/services/surfaceflinger/TransactionCallbackInvoker.h
index 61ff9bc..c09bcce 100644
--- a/services/surfaceflinger/TransactionCallbackInvoker.h
+++ b/services/surfaceflinger/TransactionCallbackInvoker.h
@@ -26,14 +26,27 @@
 #include <unordered_set>
 
 #include <android-base/thread_annotations.h>
+#include <android/gui/ITransactionCompletedListener.h>
+
 #include <binder/IBinder.h>
-#include <ftl/future.h>
-#include <gui/ITransactionCompletedListener.h>
+#include <gui/ListenerStats.h>
+#include <gui/ReleaseCallbackId.h>
+#include <renderengine/RenderEngine.h>
 #include <ui/Fence.h>
 #include <ui/FenceResult.h>
 
 namespace android {
 
+using gui::CallbackId;
+using gui::FrameEventHistoryStats;
+using gui::IListenerHash;
+using gui::ITransactionCompletedListener;
+using gui::JankData;
+using gui::ListenerCallbacks;
+using gui::ListenerStats;
+using gui::ReleaseCallbackId;
+using gui::TransactionStats;
+
 class CallbackHandle : public RefBase {
 public:
     CallbackHandle(const sp<IBinder>& transactionListener, const std::vector<CallbackId>& ids,
diff --git a/services/surfaceflinger/TransactionState.h b/services/surfaceflinger/TransactionState.h
index 7bde2c1..380301f 100644
--- a/services/surfaceflinger/TransactionState.h
+++ b/services/surfaceflinger/TransactionState.h
@@ -27,13 +27,12 @@
 
 namespace android {
 
-// Extends the client side composer state by resolving buffer cache ids.
+// Extends the client side composer state by resolving buffer.
 class ResolvedComposerState : public ComposerState {
 public:
     ResolvedComposerState() = default;
     ResolvedComposerState(ComposerState&& source) { state = std::move(source.state); }
     std::shared_ptr<renderengine::ExternalTexture> externalTexture;
-    int hwcBufferSlot = 0;
 };
 
 struct TransactionState {
diff --git a/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h b/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h
index c0a6bdb..81ca659 100644
--- a/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h
+++ b/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h
@@ -419,7 +419,7 @@
 
     void onPullAtom(FuzzedDataProvider *fdp) {
         const int32_t atomId = fdp->ConsumeIntegral<uint8_t>();
-        std::string pulledData = fdp->ConsumeRandomLengthString().c_str();
+        std::vector<uint8_t> pulledData = fdp->ConsumeRemainingBytes<uint8_t>();
         bool success = fdp->ConsumeBool();
         mFlinger->onPullAtom(atomId, &pulledData, &success);
     }
@@ -491,14 +491,14 @@
         mFlinger->getDisplayState(display, &displayState);
     }
 
-    void getStaticDisplayInfo(sp<IBinder> &display) {
+    void getStaticDisplayInfo(int64_t displayId) {
         ui::StaticDisplayInfo staticDisplayInfo;
-        mFlinger->getStaticDisplayInfo(display, &staticDisplayInfo);
+        mFlinger->getStaticDisplayInfo(displayId, &staticDisplayInfo);
     }
 
-    void getDynamicDisplayInfo(sp<IBinder> &display) {
+    void getDynamicDisplayInfo(int64_t displayId) {
         android::ui::DynamicDisplayInfo dynamicDisplayInfo;
-        mFlinger->getDynamicDisplayInfo(display, &dynamicDisplayInfo);
+        mFlinger->getDynamicDisplayInfoFromId(displayId, &dynamicDisplayInfo);
     }
     void getDisplayNativePrimaries(sp<IBinder> &display) {
         android::ui::DisplayPrimaries displayPrimaries;
@@ -522,7 +522,7 @@
         return ids.front();
     }
 
-    sp<IBinder> fuzzBoot(FuzzedDataProvider *fdp) {
+    std::pair<sp<IBinder>, int64_t> fuzzBoot(FuzzedDataProvider *fdp) {
         mFlinger->callingThreadHasUnscopedSurfaceFlingerAccess(fdp->ConsumeBool());
         const sp<Client> client = sp<Client>::make(mFlinger);
 
@@ -549,13 +549,13 @@
 
         mFlinger->bootFinished();
 
-        return display;
+        return {display, physicalDisplayId.value};
     }
 
     void fuzzSurfaceFlinger(const uint8_t *data, size_t size) {
         FuzzedDataProvider mFdp(data, size);
 
-        sp<IBinder> display = fuzzBoot(&mFdp);
+        auto [display, displayId] = fuzzBoot(&mFdp);
 
         sp<IGraphicBufferProducer> bufferProducer = sp<mock::GraphicBufferProducer>::make();
 
@@ -563,8 +563,8 @@
 
         getDisplayStats(display);
         getDisplayState(display);
-        getStaticDisplayInfo(display);
-        getDynamicDisplayInfo(display);
+        getStaticDisplayInfo(displayId);
+        getDynamicDisplayInfo(displayId);
         getDisplayNativePrimaries(display);
 
         mFlinger->setAutoLowLatencyMode(display, mFdp.ConsumeBool());
diff --git a/services/surfaceflinger/fuzzer/surfaceflinger_layer_fuzzer.cpp b/services/surfaceflinger/fuzzer/surfaceflinger_layer_fuzzer.cpp
index c5b3fa6..acfc1d4 100644
--- a/services/surfaceflinger/fuzzer/surfaceflinger_layer_fuzzer.cpp
+++ b/services/surfaceflinger/fuzzer/surfaceflinger_layer_fuzzer.cpp
@@ -160,7 +160,7 @@
     layer->setBuffer(texture, {} /*bufferData*/, mFdp.ConsumeIntegral<nsecs_t>() /*postTime*/,
                      mFdp.ConsumeIntegral<nsecs_t>() /*desiredTime*/,
                      mFdp.ConsumeBool() /*isAutoTimestamp*/,
-                     {mFdp.ConsumeIntegral<nsecs_t>()} /*dequeue*/, {} /*info*/, 0 /* hwcslot */);
+                     {mFdp.ConsumeIntegral<nsecs_t>()} /*dequeue*/, {} /*info*/);
 
     LayerRenderArea layerArea(*(flinger.flinger()), layer, getFuzzedRect(),
                               {mFdp.ConsumeIntegral<int32_t>(),
diff --git a/services/surfaceflinger/tests/Credentials_test.cpp b/services/surfaceflinger/tests/Credentials_test.cpp
index 1676844..4a45eb5 100644
--- a/services/surfaceflinger/tests/Credentials_test.cpp
+++ b/services/surfaceflinger/tests/Credentials_test.cpp
@@ -83,6 +83,15 @@
         return SurfaceComposerClient::getPhysicalDisplayToken(ids.front());
     }
 
+    static std::optional<uint64_t> getFirstDisplayId() {
+        const auto ids = SurfaceComposerClient::getPhysicalDisplayIds();
+        if (ids.empty()) {
+            return std::nullopt;
+        }
+
+        return ids.front().value;
+    }
+
     void setupBackgroundSurface() {
         mDisplay = getFirstDisplayToken();
         ASSERT_FALSE(mDisplay == nullptr);
@@ -169,29 +178,25 @@
 TEST_F(CredentialsTest, GetBuiltInDisplayAccessTest) {
     std::function<bool()> condition = [] { return getFirstDisplayToken() != nullptr; };
     // Anyone can access display information.
-    ASSERT_NO_FATAL_FAILURE(checkWithPrivileges(condition, true, true));
+    ASSERT_NO_FATAL_FAILURE(checkWithPrivileges(condition, true, false));
 }
 
 TEST_F(CredentialsTest, AllowedGetterMethodsTest) {
     // The following methods are tested with a UID that is not root, graphics,
     // or system, to show that anyone can access them.
     UIDFaker f(AID_BIN);
-    const auto display = getFirstDisplayToken();
-    ASSERT_TRUE(display != nullptr);
-
-    ui::DisplayMode mode;
-    ASSERT_EQ(NO_ERROR, SurfaceComposerClient::getActiveDisplayMode(display, &mode));
-
-    Vector<ui::DisplayMode> modes;
+    const auto id = getFirstDisplayId();
+    ASSERT_TRUE(id);
     ui::DynamicDisplayInfo info;
-    ASSERT_EQ(NO_ERROR, SurfaceComposerClient::getDynamicDisplayInfo(display, &info));
+    ASSERT_EQ(NO_ERROR, SurfaceComposerClient::getDynamicDisplayInfoFromId(*id, &info));
 }
 
 TEST_F(CredentialsTest, GetDynamicDisplayInfoTest) {
-    const auto display = getFirstDisplayToken();
+    const auto id = getFirstDisplayId();
+    ASSERT_TRUE(id);
     std::function<status_t()> condition = [=]() {
         ui::DynamicDisplayInfo info;
-        return SurfaceComposerClient::getDynamicDisplayInfo(display, &info);
+        return SurfaceComposerClient::getDynamicDisplayInfoFromId(*id, &info);
     };
     ASSERT_NO_FATAL_FAILURE(checkWithPrivileges<status_t>(condition, NO_ERROR, NO_ERROR));
 }
@@ -335,8 +340,10 @@
     status_t error = SurfaceComposerClient::isWideColorDisplay(display, &result);
     ASSERT_EQ(NO_ERROR, error);
     bool hasWideColorMode = false;
+    const auto id = getFirstDisplayId();
+    ASSERT_TRUE(id);
     ui::DynamicDisplayInfo info;
-    SurfaceComposerClient::getDynamicDisplayInfo(display, &info);
+    SurfaceComposerClient::getDynamicDisplayInfoFromId(*id, &info);
     const auto& colorModes = info.supportedColorModes;
     for (ColorMode colorMode : colorModes) {
         switch (colorMode) {
@@ -363,10 +370,10 @@
 }
 
 TEST_F(CredentialsTest, GetActiveColorModeBasicCorrectness) {
-    const auto display = getFirstDisplayToken();
-    ASSERT_FALSE(display == nullptr);
+    const auto id = getFirstDisplayId();
+    ASSERT_TRUE(id);
     ui::DynamicDisplayInfo info;
-    SurfaceComposerClient::getDynamicDisplayInfo(display, &info);
+    SurfaceComposerClient::getDynamicDisplayInfoFromId(*id, &info);
     ColorMode colorMode = info.activeColorMode;
     ASSERT_NE(static_cast<ColorMode>(BAD_VALUE), colorMode);
 }
diff --git a/services/surfaceflinger/tests/DisplayConfigs_test.cpp b/services/surfaceflinger/tests/DisplayConfigs_test.cpp
index 10dae46..4be961b 100644
--- a/services/surfaceflinger/tests/DisplayConfigs_test.cpp
+++ b/services/surfaceflinger/tests/DisplayConfigs_test.cpp
@@ -45,6 +45,7 @@
     void SetUp() override {
         const auto ids = SurfaceComposerClient::getPhysicalDisplayIds();
         ASSERT_FALSE(ids.empty());
+        mDisplayId = ids.front().value;
         mDisplayToken = SurfaceComposerClient::getPhysicalDisplayToken(ids.front());
         status_t res = SurfaceComposerClient::getDesiredDisplayModeSpecs(mDisplayToken, &mSpecs);
         ASSERT_EQ(res, NO_ERROR);
@@ -58,11 +59,14 @@
     void testSetAllowGroupSwitching(bool allowGroupSwitching);
 
     sp<IBinder> mDisplayToken;
+    uint64_t mDisplayId;
 };
 
 TEST_F(RefreshRateRangeTest, setAllConfigs) {
     ui::DynamicDisplayInfo info;
-    status_t res = SurfaceComposerClient::getDynamicDisplayInfo(mDisplayToken, &info);
+    status_t res =
+            SurfaceComposerClient::getDynamicDisplayInfoFromId(static_cast<int64_t>(mDisplayId),
+                                                               &info);
     const auto& modes = info.supportedDisplayModes;
     ASSERT_EQ(res, NO_ERROR);
     ASSERT_GT(modes.size(), 0);
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 8b0cd78..6d1b3fe 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -70,7 +70,6 @@
         ":libsurfaceflinger_sources",
         "libsurfaceflinger_unittest_main.cpp",
         "AidlPowerHalWrapperTest.cpp",
-        "CachingTest.cpp",
         "CompositionTest.cpp",
         "DispSyncSourceTest.cpp",
         "DisplayIdGeneratorTest.cpp",
@@ -93,6 +92,7 @@
         "LayerHistoryTest.cpp",
         "LayerInfoTest.cpp",
         "LayerMetadataTest.cpp",
+        "LayerHierarchyTest.cpp",
         "LayerLifecycleManagerTest.cpp",
         "LayerTest.cpp",
         "LayerTestUtils.cpp",
@@ -140,6 +140,7 @@
     defaults: [
         "android.hardware.graphics.common-ndk_static",
         "android.hardware.graphics.composer3-ndk_static",
+        "librenderengine_deps",
     ],
     static_libs: [
         "android.hardware.common-V2-ndk",
diff --git a/services/surfaceflinger/tests/unittests/CachingTest.cpp b/services/surfaceflinger/tests/unittests/CachingTest.cpp
deleted file mode 100644
index c1cbbfb..0000000
--- a/services/surfaceflinger/tests/unittests/CachingTest.cpp
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#undef LOG_TAG
-#define LOG_TAG "CachingTest"
-
-#include <gmock/gmock.h>
-#include <gtest/gtest.h>
-#include <gui/BufferQueue.h>
-
-#include "HwcSlotGenerator.h"
-
-namespace android {
-
-class SlotGenerationTest : public testing::Test {
-protected:
-    sp<HwcSlotGenerator> mHwcSlotGenerator = sp<HwcSlotGenerator>::make();
-    sp<GraphicBuffer> mBuffer1 =
-            sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
-    sp<GraphicBuffer> mBuffer2 =
-            sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
-    sp<GraphicBuffer> mBuffer3 =
-            sp<GraphicBuffer>::make(10u, 10u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
-};
-
-TEST_F(SlotGenerationTest, getHwcCacheSlot_Invalid) {
-    sp<IBinder> binder = sp<BBinder>::make();
-    // test getting invalid client_cache_id
-    client_cache_t id;
-    int slot = mHwcSlotGenerator->getHwcCacheSlot(id);
-    EXPECT_EQ(BufferQueue::INVALID_BUFFER_SLOT, slot);
-}
-
-TEST_F(SlotGenerationTest, getHwcCacheSlot_Basic) {
-    sp<IBinder> binder = sp<BBinder>::make();
-    client_cache_t id;
-    id.token = binder;
-    id.id = 0;
-    int slot = mHwcSlotGenerator->getHwcCacheSlot(id);
-    EXPECT_EQ(BufferQueue::NUM_BUFFER_SLOTS - 1, slot);
-
-    client_cache_t idB;
-    idB.token = binder;
-    idB.id = 1;
-    slot = mHwcSlotGenerator->getHwcCacheSlot(idB);
-    EXPECT_EQ(BufferQueue::NUM_BUFFER_SLOTS - 2, slot);
-
-    slot = mHwcSlotGenerator->getHwcCacheSlot(idB);
-    EXPECT_EQ(BufferQueue::NUM_BUFFER_SLOTS - 2, slot);
-
-    slot = mHwcSlotGenerator->getHwcCacheSlot(id);
-    EXPECT_EQ(BufferQueue::NUM_BUFFER_SLOTS - 1, slot);
-}
-
-TEST_F(SlotGenerationTest, getHwcCacheSlot_Reuse) {
-    sp<IBinder> binder = sp<BBinder>::make();
-    std::vector<client_cache_t> ids;
-    uint32_t cacheId = 0;
-    // fill up cache
-    for (int i = 0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) {
-        client_cache_t id;
-        id.token = binder;
-        id.id = cacheId;
-        ids.push_back(id);
-
-        int slot = mHwcSlotGenerator->getHwcCacheSlot(id);
-        EXPECT_EQ(BufferQueue::NUM_BUFFER_SLOTS - (i + 1), slot);
-        cacheId++;
-    }
-    for (int i = 0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) {
-        int slot = mHwcSlotGenerator->getHwcCacheSlot(ids[static_cast<uint32_t>(i)]);
-        EXPECT_EQ(BufferQueue::NUM_BUFFER_SLOTS - (i + 1), slot);
-    }
-
-    for (int i = 0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) {
-        client_cache_t id;
-        id.token = binder;
-        id.id = cacheId;
-        int slot = mHwcSlotGenerator->getHwcCacheSlot(id);
-        EXPECT_EQ(BufferQueue::NUM_BUFFER_SLOTS - (i + 1), slot);
-        cacheId++;
-    }
-}
-} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h b/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h
index 19c7d5c..d58e644 100644
--- a/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h
+++ b/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h
@@ -359,6 +359,7 @@
     }
 
     // Called by tests to inject a HWC display setup
+    template <bool kInitPowerMode = true>
     static void injectHwcDisplayWithNoDefaultCapabilities(DisplayTransactionTest* test) {
         const auto displayId = DisplayVariant::DISPLAY_ID::get();
         ASSERT_FALSE(GpuVirtualDisplayId::tryCast(displayId));
@@ -367,18 +368,21 @@
                 .setHwcDisplayId(HWC_DISPLAY_ID)
                 .setResolution(DisplayVariant::RESOLUTION)
                 .setActiveConfig(HWC_ACTIVE_CONFIG_ID)
-                .setPowerMode(INIT_POWER_MODE)
+                .setPowerMode(kInitPowerMode ? std::make_optional(INIT_POWER_MODE) : std::nullopt)
                 .inject(&test->mFlinger, test->mComposer);
     }
 
     // Called by tests to inject a HWC display setup
+    template <bool kInitPowerMode = true>
     static void injectHwcDisplay(DisplayTransactionTest* test) {
         EXPECT_CALL(*test->mComposer, getDisplayCapabilities(HWC_DISPLAY_ID, _))
                 .WillOnce(DoAll(SetArgPointee<1>(std::vector<DisplayCapability>({})),
                                 Return(Error::NONE)));
-        EXPECT_CALL(*test->mComposer, setPowerMode(HWC_DISPLAY_ID, INIT_POWER_MODE))
-                .WillOnce(Return(Error::NONE));
-        injectHwcDisplayWithNoDefaultCapabilities(test);
+        if constexpr (kInitPowerMode) {
+            EXPECT_CALL(*test->mComposer, setPowerMode(HWC_DISPLAY_ID, INIT_POWER_MODE))
+                    .WillOnce(Return(Error::NONE));
+        }
+        injectHwcDisplayWithNoDefaultCapabilities<kInitPowerMode>(test);
     }
 
     static std::shared_ptr<compositionengine::Display> injectCompositionDisplay(
diff --git a/services/surfaceflinger/tests/unittests/LayerHierarchyTest.cpp b/services/surfaceflinger/tests/unittests/LayerHierarchyTest.cpp
new file mode 100644
index 0000000..8560902
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/LayerHierarchyTest.cpp
@@ -0,0 +1,728 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include "FrontEnd/LayerHandle.h"
+#include "FrontEnd/LayerHierarchy.h"
+#include "FrontEnd/LayerLifecycleManager.h"
+#include "Layer.h"
+#include "gui/SurfaceComposerClient.h"
+
+#define UPDATE_AND_VERIFY(HIERARCHY)  \
+    ({                                \
+        SCOPED_TRACE("");             \
+        updateAndVerify((HIERARCHY)); \
+    })
+
+namespace android::surfaceflinger::frontend {
+
+namespace {
+LayerCreationArgs createArgs(uint32_t id, bool canBeRoot, wp<IBinder> parent, wp<IBinder> mirror) {
+    LayerCreationArgs args(nullptr, nullptr, "testlayer", 0, {}, std::make_optional(id));
+    args.addToRoot = canBeRoot;
+    args.parentHandle = parent;
+    args.mirrorLayerHandle = mirror;
+    return args;
+}
+} // namespace
+
+// To run test:
+/**
+ mp :libsurfaceflinger_unittest && adb sync; adb shell \
+    /data/nativetest/libsurfaceflinger_unittest/libsurfaceflinger_unittest \
+    --gtest_filter="LayerHierarchyTest.*" --gtest_repeat=100 \
+    --gtest_shuffle \
+    --gtest_brief=1
+*/
+
+class LayerHierarchyTest : public testing::Test {
+protected:
+    LayerHierarchyTest() {
+        // tree with 3 levels of children
+        // ROOT
+        // ├── 1
+        // │   ├── 11
+        // │   │   └── 111
+        // │   ├── 12
+        // │   │   ├── 121
+        // │   │   └── 122
+        // │   │       └── 1221
+        // │   └── 13
+        // └── 2
+
+        createRootLayer(1);
+        createRootLayer(2);
+        createLayer(11, 1);
+        createLayer(12, 1);
+        createLayer(13, 1);
+        createLayer(111, 11);
+        createLayer(121, 12);
+        createLayer(122, 12);
+        createLayer(1221, 122);
+        mLifecycleManager.commitChanges();
+    }
+    std::vector<uint32_t> getTraversalPath(const LayerHierarchy& hierarchy) const {
+        std::vector<uint32_t> layerIds;
+        hierarchy.traverse([&layerIds = layerIds](const LayerHierarchy& hierarchy,
+                                                  const LayerHierarchy::TraversalPath&) -> bool {
+            layerIds.emplace_back(hierarchy.getLayer()->id);
+            return true;
+        });
+        return layerIds;
+    }
+
+    std::vector<uint32_t> getTraversalPathInZOrder(const LayerHierarchy& hierarchy) const {
+        std::vector<uint32_t> layerIds;
+        hierarchy.traverseInZOrder(
+                [&layerIds = layerIds](const LayerHierarchy& hierarchy,
+                                       const LayerHierarchy::TraversalPath&) -> bool {
+                    layerIds.emplace_back(hierarchy.getLayer()->id);
+                    return true;
+                });
+        return layerIds;
+    }
+
+    void createRootLayer(uint32_t id) {
+        sp<LayerHandle> handle = sp<LayerHandle>::make(id);
+        mHandles[id] = handle;
+        std::vector<std::unique_ptr<RequestedLayerState>> layers;
+        layers.emplace_back(std::make_unique<RequestedLayerState>(
+                createArgs(/*id=*/id, /*canBeRoot=*/true, /*parent=*/nullptr, /*mirror=*/nullptr)));
+        mLifecycleManager.addLayers(std::move(layers));
+    }
+
+    void createLayer(uint32_t id, uint32_t parentId) {
+        sp<LayerHandle> handle = sp<LayerHandle>::make(id);
+        mHandles[id] = handle;
+        std::vector<std::unique_ptr<RequestedLayerState>> layers;
+        layers.emplace_back(std::make_unique<RequestedLayerState>(
+                createArgs(/*id=*/id, /*canBeRoot=*/false, /*parent=*/mHandles[parentId],
+                           /*mirror=*/nullptr)));
+        mLifecycleManager.addLayers(std::move(layers));
+    }
+
+    void reparentLayer(uint32_t id, uint32_t newParentId) {
+        std::vector<TransactionState> transactions;
+        transactions.emplace_back();
+        transactions.back().states.push_back({});
+
+        if (newParentId == UNASSIGNED_LAYER_ID) {
+            transactions.back().states.front().state.parentSurfaceControlForChild = nullptr;
+        } else {
+            auto parentHandle = mHandles[newParentId];
+            transactions.back().states.front().state.parentSurfaceControlForChild =
+                    sp<SurfaceControl>::make(SurfaceComposerClient::getDefault(), parentHandle,
+                                             static_cast<int32_t>(newParentId), "Test");
+        }
+        transactions.back().states.front().state.what = layer_state_t::eReparent;
+        transactions.back().states.front().state.surface = mHandles[id];
+        mLifecycleManager.applyTransactions(transactions);
+    }
+
+    void reparentRelativeLayer(uint32_t id, uint32_t relativeParentId) {
+        std::vector<TransactionState> transactions;
+        transactions.emplace_back();
+        transactions.back().states.push_back({});
+
+        if (relativeParentId == UNASSIGNED_LAYER_ID) {
+            transactions.back().states.front().state.what = layer_state_t::eLayerChanged;
+        } else {
+            auto parentHandle = mHandles[relativeParentId];
+            transactions.back().states.front().state.relativeLayerSurfaceControl =
+                    sp<SurfaceControl>::make(SurfaceComposerClient::getDefault(), parentHandle,
+                                             static_cast<int32_t>(relativeParentId), "test");
+            transactions.back().states.front().state.what = layer_state_t::eRelativeLayerChanged;
+        }
+        transactions.back().states.front().state.surface = mHandles[id];
+        mLifecycleManager.applyTransactions(transactions);
+    }
+
+    void mirrorLayer(uint32_t id, uint32_t parent, uint32_t layerToMirror) {
+        auto parentHandle = (parent == UNASSIGNED_LAYER_ID) ? nullptr : mHandles[parent];
+        auto mirrorHandle =
+                (layerToMirror == UNASSIGNED_LAYER_ID) ? nullptr : mHandles[layerToMirror];
+
+        sp<LayerHandle> handle = sp<LayerHandle>::make(id);
+        mHandles[id] = handle;
+        std::vector<std::unique_ptr<RequestedLayerState>> layers;
+        layers.emplace_back(std::make_unique<RequestedLayerState>(
+                createArgs(/*id=*/id, /*canBeRoot=*/false, /*parent=*/parentHandle,
+                           /*mirror=*/mHandles[layerToMirror])));
+        mLifecycleManager.addLayers(std::move(layers));
+    }
+
+    void updateBackgroundColor(uint32_t id, half alpha) {
+        std::vector<TransactionState> transactions;
+        transactions.emplace_back();
+        transactions.back().states.push_back({});
+        transactions.back().states.front().state.what = layer_state_t::eBackgroundColorChanged;
+        transactions.back().states.front().state.bgColorAlpha = alpha;
+        transactions.back().states.front().state.surface = mHandles[id];
+        mLifecycleManager.applyTransactions(transactions);
+    }
+
+    void destroyLayerHandle(uint32_t id) { mLifecycleManager.onHandlesDestroyed({id}); }
+
+    void updateAndVerify(LayerHierarchyBuilder& hierarchyBuilder) {
+        if (mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Hierarchy)) {
+            hierarchyBuilder.update(mLifecycleManager.getLayers(),
+                                    mLifecycleManager.getDestroyedLayers());
+        }
+        mLifecycleManager.commitChanges();
+
+        // rebuild layer hierarchy from scratch and verify that it matches the updated state.
+        LayerHierarchyBuilder newBuilder(mLifecycleManager.getLayers());
+        EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()),
+                  getTraversalPath(newBuilder.getHierarchy()));
+        EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()),
+                  getTraversalPathInZOrder(newBuilder.getHierarchy()));
+        EXPECT_FALSE(
+                mLifecycleManager.getGlobalChanges().test(RequestedLayerState::Changes::Hierarchy));
+    }
+
+    void setZ(uint32_t id, int32_t z) {
+        std::vector<TransactionState> transactions;
+        transactions.emplace_back();
+        transactions.back().states.push_back({});
+
+        transactions.back().states.front().state.what = layer_state_t::eLayerChanged;
+        transactions.back().states.front().state.layerId = static_cast<int32_t>(id);
+        transactions.back().states.front().state.z = z;
+        mLifecycleManager.applyTransactions(transactions);
+    }
+    LayerLifecycleManager mLifecycleManager;
+    std::unordered_map<uint32_t, sp<LayerHandle>> mHandles;
+};
+
+// reparenting tests
+TEST_F(LayerHierarchyTest, addLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+
+    createRootLayer(3);
+    createLayer(112, 11);
+    createLayer(12211, 1221);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+    expectedTraversalPath = {1, 11, 111, 112, 12, 121, 122, 1221, 12211, 13, 2, 3};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, reparentLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentLayer(2, 11);
+    reparentLayer(111, 12);
+    reparentLayer(1221, 1);
+    reparentLayer(1221, 13);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 2, 12, 111, 121, 122, 13, 1221};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, reparentLayerToNull) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    reparentLayer(2, UNASSIGNED_LAYER_ID);
+    reparentLayer(11, UNASSIGNED_LAYER_ID);
+    reparentLayer(1221, 13);
+    reparentLayer(1221, UNASSIGNED_LAYER_ID);
+
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 12, 121, 122, 13};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {2, 11, 111, 1221};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, reparentLayerToNullAndDestroyHandles) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentLayer(2, UNASSIGNED_LAYER_ID);
+    reparentLayer(11, UNASSIGNED_LAYER_ID);
+    reparentLayer(1221, UNASSIGNED_LAYER_ID);
+
+    destroyLayerHandle(2);
+    destroyLayerHandle(11);
+    destroyLayerHandle(1221);
+
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 12, 121, 122, 13};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {111};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, destroyHandleThenDestroyParentLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    destroyLayerHandle(111);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    // handle is destroyed but layer is kept alive and reachable by parent
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+
+    // destroy parent layer and the child gets destroyed
+    reparentLayer(11, UNASSIGNED_LAYER_ID);
+    destroyLayerHandle(11);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    expectedTraversalPath = {1, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, layerSurvivesTemporaryReparentToNull) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentLayer(11, UNASSIGNED_LAYER_ID);
+    reparentLayer(11, 1);
+
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+// offscreen tests
+TEST_F(LayerHierarchyTest, layerMovesOnscreen) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    reparentLayer(11, UNASSIGNED_LAYER_ID);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    reparentLayer(11, 1);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, addLayerToOffscreenParent) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    reparentLayer(11, UNASSIGNED_LAYER_ID);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    createLayer(112, 11);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {11, 111, 112};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+// rel-z tests
+TEST_F(LayerHierarchyTest, setRelativeParent) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentRelativeLayer(11, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2, 11, 111};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1, 12, 121, 122, 1221, 13, 2, 11, 111};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, reparentFromRelativeParentWithSetLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentRelativeLayer(11, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    reparentRelativeLayer(11, UNASSIGNED_LAYER_ID);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, reparentToRelativeParent) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentRelativeLayer(11, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    reparentLayer(11, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 12, 121, 122, 1221, 13, 2, 11, 111};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, setParentAsRelativeParent) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentLayer(11, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    reparentRelativeLayer(11, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 12, 121, 122, 1221, 13, 2, 11, 111};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, relativeChildMovesOffscreenIsNotTraversable) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentRelativeLayer(11, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    reparentLayer(2, UNASSIGNED_LAYER_ID);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1, 12, 121, 122, 1221, 13};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {2, 11, 111};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+// mirror tests
+TEST_F(LayerHierarchyTest, canTraverseMirrorLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    mirrorLayer(/*layer*/ 14, /*parent*/ 1, /*layerToMirror*/ 11);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1,    11, 111, 12, 121, 122,
+                                                   1221, 13, 14,  11, 111, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, canMirrorOffscreenLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    reparentLayer(11, UNASSIGNED_LAYER_ID);
+    mirrorLayer(/*layer*/ 14, /*parent*/ 1, /*layerToMirror*/ 11);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 12, 121, 122, 1221, 13, 14, 11, 111, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {11, 111};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, newChildLayerIsUpdatedInMirrorHierarchy) {
+    mirrorLayer(/*layer*/ 14, /*parent*/ 1, /*layerToMirror*/ 11);
+    mLifecycleManager.commitChanges();
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    createLayer(1111, 111);
+    createLayer(112, 11);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1,    11, 111, 1111, 112, 12,   121, 122,
+                                                   1221, 13, 14,  11,   111, 1111, 112, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+// mirror & relatives tests
+TEST_F(LayerHierarchyTest, mirrorWithRelativeOutsideMirrorHierarchy) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentRelativeLayer(111, 12);
+    mirrorLayer(/*layer*/ 14, /*parent*/ 1, /*layerToMirror*/ 11);
+
+    // ROOT
+    // ├── 1
+    // │   ├── 11
+    // │   │   └── 111
+    // │   ├── 12
+    // │   │   ├── 121
+    // │   │   ├── 122
+    // │   │   │   └── 1221
+    // │   │   └ - 111 (relative)
+    // │   ├── 13
+    // │   └── 14
+    // │       └ * 11 (mirroring)
+    // └── 2
+
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1,    11, 111, 12, 111, 121, 122,
+                                                   1221, 13, 14,  11, 111, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    // 111 is not reachable in the mirror
+    expectedTraversalPath = {1, 11, 12, 111, 121, 122, 1221, 13, 14, 11, 2};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, mirrorWithRelativeInsideMirrorHierarchy) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentRelativeLayer(1221, 12);
+    mirrorLayer(/*layer*/ 14, /*parent*/ 1, /*layerToMirror*/ 12);
+
+    // ROOT
+    // ├── 1
+    // │   ├── 11
+    // │   │   └── 111
+    // │   ├── 12
+    // │   │   ├── 121
+    // │   │   ├── 122
+    // │   │   │   └── 1221
+    // │   │   └ - 1221 (relative)
+    // │   ├── 13
+    // │   └── 14
+    // │       └ * 12 (mirroring)
+    // └── 2
+
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+    std::vector<uint32_t> expectedTraversalPath = {1,  11, 111, 12,  121, 122,  1221, 1221,
+                                                   13, 14, 12,  121, 122, 1221, 1221, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    // relative layer 1221 is traversable in the mirrored hierarchy as well
+    expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 14, 12, 121, 122, 1221, 2};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, childMovesOffscreenWhenRelativeParentDies) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    reparentRelativeLayer(11, 2);
+    reparentLayer(2, UNASSIGNED_LAYER_ID);
+    destroyLayerHandle(2);
+
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1, 12, 121, 122, 1221, 13};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {11, 111};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+
+    // remove relative parent so layer becomes onscreen again
+    reparentRelativeLayer(11, UNASSIGNED_LAYER_ID);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, offscreenLayerCannotBeRelativeToOnscreenLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentRelativeLayer(1221, 2);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    // verify relz path
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2, 1221};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1, 11, 111, 12, 121, 122, 13, 2, 1221};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+
+    // offscreen layer cannot be reached as a relative child
+    reparentLayer(12, UNASSIGNED_LAYER_ID);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    expectedTraversalPath = {1, 11, 111, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {12, 121, 122, 1221};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+
+    // layer when onscreen can be reached as a relative child again
+    reparentLayer(12, 1);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13, 2, 1221};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1, 11, 111, 12, 121, 122, 13, 2, 1221};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, backgroundLayersAreBehindParentLayer) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    updateBackgroundColor(1, 0.5);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 1222, 11, 111, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1222, 1, 11, 111, 12, 121, 122, 1221, 13, 2};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+// cycle tests
+TEST_F(LayerHierarchyTest, ParentBecomesTheChild) {
+    // remove default hierarchy
+    mLifecycleManager = LayerLifecycleManager();
+    createRootLayer(1);
+    createLayer(11, 1);
+    reparentLayer(1, 11);
+    mLifecycleManager.commitChanges();
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    std::vector<uint32_t> expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, RelativeLoops) {
+    // remove default hierarchy
+    mLifecycleManager = LayerLifecycleManager();
+    createRootLayer(1);
+    createRootLayer(2);
+    createLayer(11, 1);
+    reparentRelativeLayer(11, 2);
+    reparentRelativeLayer(2, 11);
+    mLifecycleManager.commitChanges();
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    // fix loop
+    uint32_t invalidRelativeRoot;
+    bool hasRelZLoop = hierarchyBuilder.getHierarchy().hasRelZLoop(invalidRelativeRoot);
+    EXPECT_TRUE(hasRelZLoop);
+    mLifecycleManager.fixRelativeZLoop(invalidRelativeRoot);
+    hierarchyBuilder.update(mLifecycleManager.getLayers(), mLifecycleManager.getDestroyedLayers());
+    EXPECT_EQ(invalidRelativeRoot, 11u);
+    EXPECT_FALSE(hierarchyBuilder.getHierarchy().hasRelZLoop(invalidRelativeRoot));
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 2, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {11, 2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, IndirectRelativeLoops) {
+    // remove default hierarchy
+    mLifecycleManager = LayerLifecycleManager();
+    createRootLayer(1);
+    createRootLayer(2);
+    createLayer(11, 1);
+    createLayer(111, 11);
+    createLayer(21, 2);
+    createLayer(22, 2);
+    createLayer(221, 22);
+    reparentRelativeLayer(22, 111);
+    reparentRelativeLayer(11, 221);
+    mLifecycleManager.commitChanges();
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+
+    // fix loop
+    uint32_t invalidRelativeRoot;
+    bool hasRelZLoop = hierarchyBuilder.getHierarchy().hasRelZLoop(invalidRelativeRoot);
+    EXPECT_TRUE(hasRelZLoop);
+    mLifecycleManager.fixRelativeZLoop(invalidRelativeRoot);
+    hierarchyBuilder.update(mLifecycleManager.getLayers(), mLifecycleManager.getDestroyedLayers());
+    EXPECT_FALSE(hierarchyBuilder.getHierarchy().hasRelZLoop(invalidRelativeRoot));
+
+    std::vector<uint32_t> expectedTraversalPath = {1, 11, 111, 22, 221, 2, 21, 22, 221};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1, 2, 21};
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {11, 111, 22, 221};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, ReparentRootLayerToNull) {
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    reparentLayer(1, UNASSIGNED_LAYER_ID);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {2};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    expectedTraversalPath = {1, 11, 111, 12, 121, 122, 1221, 13};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+TEST_F(LayerHierarchyTest, AddRemoveLayerInSameTransaction) {
+    // remove default hierarchy
+    mLifecycleManager = LayerLifecycleManager();
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    createRootLayer(1);
+    destroyLayerHandle(1);
+    UPDATE_AND_VERIFY(hierarchyBuilder);
+
+    std::vector<uint32_t> expectedTraversalPath = {};
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPathInZOrder(hierarchyBuilder.getHierarchy()), expectedTraversalPath);
+    EXPECT_EQ(getTraversalPath(hierarchyBuilder.getOffscreenHierarchy()), expectedTraversalPath);
+}
+
+// traversal path test
+TEST_F(LayerHierarchyTest, traversalPathId) {
+    setZ(122, -1);
+    LayerHierarchyBuilder hierarchyBuilder(mLifecycleManager.getLayers());
+    auto checkTraversalPathIdVisitor =
+            [](const LayerHierarchy& hierarchy,
+               const LayerHierarchy::TraversalPath& traversalPath) -> bool {
+        EXPECT_EQ(hierarchy.getLayer()->id, traversalPath.id);
+        return true;
+    };
+    hierarchyBuilder.getHierarchy().traverse(checkTraversalPathIdVisitor);
+    hierarchyBuilder.getHierarchy().traverseInZOrder(checkTraversalPathIdVisitor);
+}
+
+} // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_DisplayModeSwitching.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_DisplayModeSwitching.cpp
index 074bf8c..ad3bd35 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_DisplayModeSwitching.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_DisplayModeSwitching.cpp
@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
-#include "mock/MockDisplayModeSpecs.h"
-#include "mock/MockEventThread.h"
 #undef LOG_TAG
 #define LOG_TAG "LibSurfaceFlingerUnittests"
 
 #include "DisplayTransactionTestHelpers.h"
+#include "mock/DisplayHardware/MockDisplayMode.h"
+#include "mock/MockDisplayModeSpecs.h"
 
 #include <ftl/fake_guard.h>
 #include <scheduler/Fps.h>
@@ -42,8 +42,7 @@
         PrimaryDisplayVariant::setupNativeWindowSurfaceCreationCallExpectations(this);
         PrimaryDisplayVariant::setupHwcGetActiveConfigCallExpectations(this);
 
-        DisplayModes modes = makeModes(kMode60, kMode90, kMode120, kMode90_4K);
-        auto selectorPtr = std::make_shared<scheduler::RefreshRateSelector>(modes, kModeId60);
+        auto selectorPtr = std::make_shared<scheduler::RefreshRateSelector>(kModes, kModeId60);
 
         setupScheduler(selectorPtr);
 
@@ -51,7 +50,7 @@
         mFlinger.configureAndCommit();
 
         mDisplay = PrimaryDisplayVariant::makeFakeExistingDisplayInjector(this)
-                           .setDisplayModes(std::move(modes), kModeId60, std::move(selectorPtr))
+                           .setDisplayModes(kModes, kModeId60, std::move(selectorPtr))
                            .inject();
 
         // isVsyncPeriodSwitchSupported should return true, otherwise the SF's HWC proxy
@@ -78,6 +77,8 @@
     static constexpr ui::Size kResolution4K{3840, 2160};
     static inline const DisplayModePtr kMode90_4K =
             createDisplayMode(kModeId90_4K, 90_Hz, 3, kResolution4K);
+
+    static inline const DisplayModes kModes = makeModes(kMode60, kMode90, kMode120, kMode90_4K);
 };
 
 void DisplayModeSwitchingTest::setupScheduler(
@@ -283,5 +284,114 @@
     ASSERT_EQ(mDisplay->getActiveMode().modePtr->getId(), kModeId90_4K);
 }
 
+TEST_F(DisplayModeSwitchingTest, multiDisplay) {
+    ftl::FakeGuard guard(kMainThreadContext);
+
+    constexpr HWDisplayId kInnerDisplayHwcId = PrimaryDisplayVariant::HWC_DISPLAY_ID;
+    constexpr HWDisplayId kOuterDisplayHwcId = kInnerDisplayHwcId + 1;
+
+    constexpr PhysicalDisplayId kOuterDisplayId = PhysicalDisplayId::fromPort(254u);
+
+    constexpr bool kIsPrimary = false;
+    TestableSurfaceFlinger::FakeHwcDisplayInjector(kOuterDisplayId, hal::DisplayType::PHYSICAL,
+                                                   kIsPrimary)
+            .setHwcDisplayId(kOuterDisplayHwcId)
+            .inject(&mFlinger, mComposer);
+
+    const auto outerDisplay = mFakeDisplayInjector.injectInternalDisplay(
+            [&](FakeDisplayDeviceInjector& injector) {
+                injector.setDisplayModes(mock::cloneForDisplay(kOuterDisplayId, kModes),
+                                         kModeId120);
+            },
+            {.displayId = kOuterDisplayId,
+             .hwcDisplayId = kOuterDisplayHwcId,
+             .isPrimary = kIsPrimary});
+
+    const auto& innerDisplay = mDisplay;
+
+    EXPECT_FALSE(innerDisplay->getDesiredActiveMode());
+    EXPECT_FALSE(outerDisplay->getDesiredActiveMode());
+
+    EXPECT_EQ(innerDisplay->getActiveMode().modePtr->getId(), kModeId60);
+    EXPECT_EQ(outerDisplay->getActiveMode().modePtr->getId(), kModeId120);
+
+    mFlinger.onActiveDisplayChanged(innerDisplay);
+
+    EXPECT_EQ(NO_ERROR,
+              mFlinger.setDesiredDisplayModeSpecs(innerDisplay->getDisplayToken().promote(),
+                                                  mock::createDisplayModeSpecs(kModeId90.value(),
+                                                                               false, 0.f, 120.f)));
+
+    EXPECT_EQ(NO_ERROR,
+              mFlinger.setDesiredDisplayModeSpecs(outerDisplay->getDisplayToken().promote(),
+                                                  mock::createDisplayModeSpecs(kModeId60.value(),
+                                                                               false, 0.f, 120.f)));
+
+    // Transition on the inner display.
+    ASSERT_TRUE(innerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(innerDisplay->getDesiredActiveMode()->modeOpt->modePtr->getId(), kModeId90);
+
+    // No transition on the outer display.
+    EXPECT_FALSE(outerDisplay->getDesiredActiveMode());
+
+    const VsyncPeriodChangeTimeline timeline{.refreshRequired = true};
+    EXPECT_CALL(*mComposer,
+                setActiveConfigWithConstraints(kInnerDisplayHwcId,
+                                               hal::HWConfigId(kModeId90.value()), _, _))
+            .WillOnce(DoAll(SetArgPointee<3>(timeline), Return(Error::NONE)));
+
+    mFlinger.commit();
+
+    // Transition on the inner display.
+    ASSERT_TRUE(innerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(innerDisplay->getDesiredActiveMode()->modeOpt->modePtr->getId(), kModeId90);
+
+    // No transition on the outer display.
+    EXPECT_FALSE(outerDisplay->getDesiredActiveMode());
+
+    mFlinger.commit();
+
+    // Transition on the inner display.
+    EXPECT_FALSE(innerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(innerDisplay->getActiveMode().modePtr->getId(), kModeId90);
+
+    // No transition on the outer display.
+    EXPECT_FALSE(outerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(outerDisplay->getActiveMode().modePtr->getId(), kModeId120);
+
+    mFlinger.onActiveDisplayChanged(outerDisplay);
+
+    // No transition on the inner display.
+    EXPECT_FALSE(innerDisplay->getDesiredActiveMode());
+
+    // Transition on the outer display.
+    ASSERT_TRUE(outerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(outerDisplay->getDesiredActiveMode()->modeOpt->modePtr->getId(), kModeId60);
+
+    EXPECT_CALL(*mComposer,
+                setActiveConfigWithConstraints(kOuterDisplayHwcId,
+                                               hal::HWConfigId(kModeId60.value()), _, _))
+            .WillOnce(DoAll(SetArgPointee<3>(timeline), Return(Error::NONE)));
+
+    mFlinger.commit();
+
+    // No transition on the inner display.
+    EXPECT_FALSE(innerDisplay->getDesiredActiveMode());
+
+    // Transition on the outer display.
+    ASSERT_TRUE(outerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(outerDisplay->getDesiredActiveMode()->modeOpt->modePtr->getId(), kModeId60);
+
+    mFlinger.commit();
+
+    // No transition on the inner display.
+    EXPECT_FALSE(innerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(innerDisplay->getActiveMode().modePtr->getId(), kModeId90);
+
+    // Transition on the outer display.
+    EXPECT_FALSE(outerDisplay->getDesiredActiveMode());
+    EXPECT_EQ(outerDisplay->getActiveMode().modePtr->getId(), kModeId60);
+}
+
 } // namespace
 } // namespace android
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_ExcludeDolbyVisionTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_ExcludeDolbyVisionTest.cpp
index 11e734a..0e149d2 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_ExcludeDolbyVisionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_ExcludeDolbyVisionTest.cpp
@@ -61,7 +61,7 @@
 TEST_F(ExcludeDolbyVisionTest, excludesDolbyVisionOnModesHigherThan4k30) {
     injectDisplayModes({mode4k60});
     ui::DynamicDisplayInfo info;
-    mFlinger.getDynamicDisplayInfo(mDisplay->getDisplayToken().promote(), &info);
+    mFlinger.getDynamicDisplayInfoFromToken(mDisplay->getDisplayToken().promote(), &info);
 
     std::vector<ui::DisplayMode> displayModes = info.supportedDisplayModes;
 
@@ -75,7 +75,7 @@
 TEST_F(ExcludeDolbyVisionTest, includesDolbyVisionOnModesLowerThanOrEqualTo4k30) {
     injectDisplayModes({mode1080p60, mode4k30, mode4k30NonStandard});
     ui::DynamicDisplayInfo info;
-    mFlinger.getDynamicDisplayInfo(mDisplay->getDisplayToken().promote(), &info);
+    mFlinger.getDynamicDisplayInfoFromToken(mDisplay->getDisplayToken().promote(), &info);
 
     std::vector<ui::DisplayMode> displayModes = info.supportedDisplayModes;
 
@@ -94,7 +94,7 @@
 TEST_F(ExcludeDolbyVisionTest, 4k30IsNotReportedAsAValidHdrType) {
     injectDisplayModes({mode4k60});
     ui::DynamicDisplayInfo info;
-    mFlinger.getDynamicDisplayInfo(mDisplay->getDisplayToken().promote(), &info);
+    mFlinger.getDynamicDisplayInfoFromToken(mDisplay->getDisplayToken().promote(), &info);
 
     std::vector<ui::Hdr> displayHdrTypes = info.hdrCapabilities.getSupportedHdrTypes();
 
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_PowerHintTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_PowerHintTest.cpp
index bc66961..622717f 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_PowerHintTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_PowerHintTest.cpp
@@ -97,7 +97,6 @@
                     .setNativeWindow(mNativeWindow)
                     .setPowerMode(hal::PowerMode::ON)
                     .inject();
-    mFlinger.mutableActiveDisplayId() = mDisplay->getPhysicalId();
 }
 
 void SurfaceFlingerPowerHintTest::setupScheduler() {
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
index 25857ec..ab732ed 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
@@ -259,12 +259,6 @@
         auto injector = Display::makeFakeExistingDisplayInjector(test);
         const auto display = injector.inject();
         display->setPowerMode(mode);
-        if (injector.physicalDisplay()
-                    .transform(&display::PhysicalDisplay::isInternal)
-                    .value_or(false)) {
-            test->mFlinger.mutableActiveDisplayId() = display->getPhysicalId();
-        }
-
         return display;
     }
 
@@ -410,11 +404,13 @@
     EXPECT_EQ(PowerMode::ON, display.mutableDisplayDevice()->getPowerMode());
 }
 
-TEST_F(SetPowerModeInternalTest, transitionsDisplayFromOffToOnPrimaryDisplay) {
+// TODO(b/262417075)
+TEST_F(SetPowerModeInternalTest, DISABLED_transitionsDisplayFromOffToOnPrimaryDisplay) {
     transitionDisplayCommon<PrimaryDisplayPowerCase<TransitionOffToOnVariant>>();
 }
 
-TEST_F(SetPowerModeInternalTest, transitionsDisplayFromOffToDozeSuspendPrimaryDisplay) {
+// TODO(b/262417075)
+TEST_F(SetPowerModeInternalTest, DISABLED_transitionsDisplayFromOffToDozeSuspendPrimaryDisplay) {
     transitionDisplayCommon<PrimaryDisplayPowerCase<TransitionOffToDozeSuspendVariant>>();
 }
 
@@ -450,11 +446,13 @@
     transitionDisplayCommon<PrimaryDisplayPowerCase<TransitionOnToUnknownVariant>>();
 }
 
-TEST_F(SetPowerModeInternalTest, transitionsDisplayFromOffToOnExternalDisplay) {
+// TODO(b/262417075)
+TEST_F(SetPowerModeInternalTest, DISABLED_transitionsDisplayFromOffToOnExternalDisplay) {
     transitionDisplayCommon<ExternalDisplayPowerCase<TransitionOffToOnVariant>>();
 }
 
-TEST_F(SetPowerModeInternalTest, transitionsDisplayFromOffToDozeSuspendExternalDisplay) {
+// TODO(b/262417075)
+TEST_F(SetPowerModeInternalTest, DISABLED_transitionsDisplayFromOffToDozeSuspendExternalDisplay) {
     transitionDisplayCommon<ExternalDisplayPowerCase<TransitionOffToDozeSuspendVariant>>();
 }
 
@@ -490,5 +488,38 @@
     transitionDisplayCommon<ExternalDisplayPowerCase<TransitionOnToUnknownVariant>>();
 }
 
+// TODO(b/262417075)
+TEST_F(SetPowerModeInternalTest, DISABLED_designatesLeaderDisplay) {
+    using Case = SimplePrimaryDisplayCase;
+
+    // --------------------------------------------------------------------
+    // Preconditions
+
+    // Inject a primary display with uninitialized power mode.
+    constexpr bool kInitPowerMode = false;
+    Case::Display::injectHwcDisplay<kInitPowerMode>(this);
+    auto injector = Case::Display::makeFakeExistingDisplayInjector(this);
+    injector.setPowerMode(std::nullopt);
+    const auto display = injector.inject();
+
+    // --------------------------------------------------------------------
+    // Invocation
+
+    // FakeDisplayDeviceInjector registers the display with Scheduler, so it has already been
+    // designated as the leader. Set an arbitrary leader to verify that `setPowerModeInternal`
+    // designates a leader regardless of any preceding `Scheduler::registerDisplay` call(s).
+    constexpr PhysicalDisplayId kPlaceholderId = PhysicalDisplayId::fromPort(42);
+    ASSERT_NE(display->getPhysicalId(), kPlaceholderId);
+    mFlinger.scheduler()->setLeaderDisplay(kPlaceholderId);
+
+    mFlinger.setPowerModeInternal(display, PowerMode::ON);
+
+    // --------------------------------------------------------------------
+    // Postconditions
+
+    // The primary display should be designated as the leader.
+    EXPECT_EQ(mFlinger.scheduler()->leaderDisplayId(), display->getPhysicalId());
+}
+
 } // namespace
 } // namespace android
diff --git a/services/surfaceflinger/tests/unittests/TestableScheduler.h b/services/surfaceflinger/tests/unittests/TestableScheduler.h
index 54c10c5..b8a6063 100644
--- a/services/surfaceflinger/tests/unittests/TestableScheduler.h
+++ b/services/surfaceflinger/tests/unittests/TestableScheduler.h
@@ -87,6 +87,10 @@
         Scheduler::unregisterDisplay(displayId);
     }
 
+    std::optional<PhysicalDisplayId> leaderDisplayId() const NO_THREAD_SAFETY_ANALYSIS {
+        return mLeaderDisplayId;
+    }
+
     void setLeaderDisplay(PhysicalDisplayId displayId) {
         ftl::FakeGuard guard(kMainThreadContext);
         Scheduler::setLeaderDisplay(displayId);
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index c8362ee..2117084 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -471,7 +471,7 @@
     void onActiveDisplayChanged(const sp<DisplayDevice>& activeDisplay) {
         Mutex::Autolock lock(mFlinger->mStateLock);
         ftl::FakeGuard guard(kMainThreadContext);
-        mFlinger->onActiveDisplayChangedLocked(activeDisplay);
+        mFlinger->onActiveDisplayChangedLocked(nullptr, activeDisplay);
     }
 
     auto createLayer(LayerCreationArgs& args, const sp<IBinder>& parentHandle,
@@ -487,9 +487,9 @@
 
     void updateLayerMetadataSnapshot() { mFlinger->updateLayerMetadataSnapshot(); }
 
-    void getDynamicDisplayInfo(const sp<IBinder>& displayToken,
-                               ui::DynamicDisplayInfo* dynamicDisplayInfo) {
-        mFlinger->getDynamicDisplayInfo(displayToken, dynamicDisplayInfo);
+    void getDynamicDisplayInfoFromToken(const sp<IBinder>& displayToken,
+                                        ui::DynamicDisplayInfo* dynamicDisplayInfo) {
+        mFlinger->getDynamicDisplayInfoFromToken(displayToken, dynamicDisplayInfo);
     }
 
     /* ------------------------------------------------------------------------
@@ -627,7 +627,7 @@
             return *this;
         }
 
-        auto& setPowerMode(hal::PowerMode mode) {
+        auto& setPowerMode(std::optional<hal::PowerMode> mode) {
             mPowerMode = mode;
             return *this;
         }
@@ -650,7 +650,11 @@
             auto display = std::make_unique<HWC2Display>(*composer, *mCapabilities, mHwcDisplayId,
                                                          mHwcDisplayType);
             display->mutableIsConnected() = true;
-            display->setPowerMode(mPowerMode);
+
+            if (mPowerMode) {
+                display->setPowerMode(*mPowerMode);
+            }
+
             flinger->mutableHwcDisplayData()[mDisplayId].hwcDisplay = std::move(display);
 
             EXPECT_CALL(*composer, getDisplayConfigs(mHwcDisplayId, _))
@@ -715,7 +719,7 @@
         int32_t mDpiY = DEFAULT_DPI;
         int32_t mConfigGroup = DEFAULT_CONFIG_GROUP;
         hal::HWConfigId mActiveConfig = DEFAULT_ACTIVE_CONFIG;
-        hal::PowerMode mPowerMode = DEFAULT_POWER_MODE;
+        std::optional<hal::PowerMode> mPowerMode = DEFAULT_POWER_MODE;
         const std::unordered_set<aidl::android::hardware::graphics::composer3::Capability>*
                 mCapabilities = nullptr;
     };
@@ -792,7 +796,7 @@
             return *this;
         }
 
-        auto& setPowerMode(hal::PowerMode mode) {
+        auto& setPowerMode(std::optional<hal::PowerMode> mode) {
             mCreationArgs.initialPowerMode = mode;
             return *this;
         }
@@ -857,6 +861,10 @@
                 LOG_ALWAYS_FATAL_IF(!physicalIdOpt);
                 const auto physicalId = *physicalIdOpt;
 
+                if (mCreationArgs.isPrimary) {
+                    mFlinger.mutableActiveDisplayId() = physicalId;
+                }
+
                 LOG_ALWAYS_FATAL_IF(!mHwcDisplayId);
 
                 const auto activeMode = modes.get(activeModeId);
diff --git a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
index 1dd4f25..a9ae1d3 100644
--- a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
@@ -44,11 +44,14 @@
 namespace {
 
 using testing::_;
+using testing::AllOf;
 using testing::AnyNumber;
 using testing::Contains;
+using testing::ElementsAre;
 using testing::HasSubstr;
 using testing::InSequence;
 using testing::Not;
+using testing::Property;
 using testing::SizeIs;
 using testing::StrEq;
 using testing::UnorderedElementsAre;
@@ -645,7 +648,7 @@
     ASSERT_TRUE(globalProto.ParseFromString(inputCommand(InputCommand::DUMP_ALL, FMT_PROTO)));
 
     ASSERT_EQ(1, globalProto.stats_size());
-    const SFTimeStatsLayerProto& layerProto = globalProto.stats().Get(0);
+    const SFTimeStatsLayerProto& layerProto = globalProto.stats(0);
     ASSERT_TRUE(layerProto.has_layer_name());
     EXPECT_EQ(genLayerName(LAYER_ID_0), layerProto.layer_name());
     ASSERT_TRUE(layerProto.has_total_frames());
@@ -653,7 +656,7 @@
     ASSERT_EQ(6, layerProto.deltas_size());
     for (const SFTimeStatsDeltaProto& deltaProto : layerProto.deltas()) {
         ASSERT_EQ(1, deltaProto.histograms_size());
-        const SFTimeStatsHistogramBucketProto& histogramProto = deltaProto.histograms().Get(0);
+        const SFTimeStatsHistogramBucketProto& histogramProto = deltaProto.histograms(0);
         EXPECT_EQ(1, histogramProto.frame_count());
         if ("post2acquire" == deltaProto.delta_name()) {
             EXPECT_EQ(1, histogramProto.time_millis());
@@ -673,6 +676,46 @@
     }
 }
 
+using LayerProto = SFTimeStatsLayerProto;
+using DeltaProto = SFTimeStatsDeltaProto;
+using BucketProto = SFTimeStatsHistogramBucketProto;
+
+TEST_F(TimeStatsTest, canComputeLayerStabilityHistogram) {
+    EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
+
+    insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 1, 1000000);
+    insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 2, 2000000);
+    insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 3, 3000000); // 0ms delta
+    // Slightly unstable frames
+    insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 4, 5000000); // 1ms delta
+    insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 5, 6000000); // 1ms delta
+
+    SFTimeStatsGlobalProto globalProto;
+    ASSERT_TRUE(globalProto.ParseFromString(inputCommand(InputCommand::DUMP_ALL, FMT_PROTO)));
+
+    EXPECT_THAT(globalProto.stats(),
+                ElementsAre(AllOf(
+                        Property(&LayerProto::layer_name, genLayerName(LAYER_ID_0)),
+                        Property(&LayerProto::total_frames, 4),
+                        Property(&LayerProto::deltas,
+                                 Contains(AllOf(Property(&DeltaProto::delta_name,
+                                                         "present2presentDelta"),
+                                                Property(&DeltaProto::histograms,
+                                                         UnorderedElementsAre(
+                                                                 AllOf(Property(&BucketProto::
+                                                                                        time_millis,
+                                                                                0),
+                                                                       Property(&BucketProto::
+                                                                                        frame_count,
+                                                                                1)),
+                                                                 AllOf(Property(&BucketProto::
+                                                                                        time_millis,
+                                                                                1),
+                                                                       Property(&BucketProto::
+                                                                                        frame_count,
+                                                                                2))))))))));
+}
+
 TEST_F(TimeStatsTest, canNotInsertInvalidLayerNameTimeStats) {
     EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
 
@@ -1099,8 +1142,10 @@
                                       kGameMode, JankType::None, DISPLAY_DEADLINE_DELTA,
                                       DISPLAY_PRESENT_JITTER, APP_DEADLINE_DELTA});
 
+    std::vector<uint8_t> pulledBytes;
+    EXPECT_TRUE(mTimeStats->onPullAtom(10062 /*SURFACEFLINGER_STATS_GLOBAL_INFO*/, &pulledBytes));
     std::string pulledData;
-    EXPECT_TRUE(mTimeStats->onPullAtom(10062 /*SURFACEFLINGER_STATS_GLOBAL_INFO*/, &pulledData));
+    pulledData.assign(pulledBytes.begin(), pulledBytes.end());
 
     android::surfaceflinger::SurfaceflingerStatsGlobalInfoWrapper atomList;
     ASSERT_TRUE(atomList.ParseFromString(pulledData));
@@ -1234,8 +1279,10 @@
                                       GameMode::Standard, JankType::None, DISPLAY_DEADLINE_DELTA,
                                       DISPLAY_PRESENT_JITTER, APP_DEADLINE_DELTA_3MS});
 
+    std::vector<uint8_t> pulledBytes;
+    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledBytes));
     std::string pulledData;
-    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledData));
+    pulledData.assign(pulledBytes.begin(), pulledBytes.end());
 
     SurfaceflingerStatsLayerInfoWrapper atomList;
     ASSERT_TRUE(atomList.ParseFromString(pulledData));
@@ -1322,8 +1369,10 @@
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 5, 4000000, {}, GameMode::Battery);
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 6, 5000000, {}, GameMode::Custom);
 
+    std::vector<uint8_t> pulledBytes;
+    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledBytes));
     std::string pulledData;
-    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledData));
+    pulledData.assign(pulledBytes.begin(), pulledBytes.end());
 
     SurfaceflingerStatsLayerInfoWrapper atomList;
     ASSERT_TRUE(atomList.ParseFromString(pulledData));
@@ -1412,8 +1461,10 @@
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_1, 1, 2000000);
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_1, 2, 3000000);
 
+    std::vector<uint8_t> pulledBytes;
+    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledBytes));
     std::string pulledData;
-    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledData));
+    pulledData.assign(pulledBytes.begin(), pulledBytes.end());
 
     SurfaceflingerStatsLayerInfoWrapper atomList;
     ASSERT_TRUE(atomList.ParseFromString(pulledData));
@@ -1437,8 +1488,10 @@
     mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(3000000));
     mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(5000000));
 
+    std::vector<uint8_t> pulledBytes;
+    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledBytes));
     std::string pulledData;
-    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledData));
+    pulledData.assign(pulledBytes.begin(), pulledBytes.end());
 
     SurfaceflingerStatsLayerInfoWrapper atomList;
     ASSERT_TRUE(atomList.ParseFromString(pulledData));
@@ -1456,8 +1509,10 @@
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 3, 4000000);
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 4, 5000000);
 
+    std::vector<uint8_t> pulledBytes;
+    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledBytes));
     std::string pulledData;
-    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledData));
+    pulledData.assign(pulledBytes.begin(), pulledBytes.end());
 
     SurfaceflingerStatsLayerInfoWrapper atomList;
     ASSERT_TRUE(atomList.ParseFromString(pulledData));
@@ -1476,8 +1531,10 @@
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_1, 2, 3000000);
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_1, 4, 5000000);
 
+    std::vector<uint8_t> pulledBytes;
+    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledBytes));
     std::string pulledData;
-    EXPECT_TRUE(mTimeStats->onPullAtom(10063 /*SURFACEFLINGER_STATS_LAYER_INFO*/, &pulledData));
+    pulledData.assign(pulledBytes.begin(), pulledBytes.end());
 
     SurfaceflingerStatsLayerInfoWrapper atomList;
     ASSERT_TRUE(atomList.ParseFromString(pulledData));
diff --git a/services/surfaceflinger/tests/unittests/TransactionFrameTracerTest.cpp b/services/surfaceflinger/tests/unittests/TransactionFrameTracerTest.cpp
index 09d002f..1173d1c 100644
--- a/services/surfaceflinger/tests/unittests/TransactionFrameTracerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TransactionFrameTracerTest.cpp
@@ -126,7 +126,7 @@
                                                          HAL_PIXEL_FORMAT_RGBA_8888,
                                                          0ULL /*usage*/);
         layer->setBuffer(externalTexture, bufferData, postTime, /*desiredPresentTime*/ 30, false,
-                         dequeueTime, FrameTimelineInfo{}, 0);
+                         dequeueTime, FrameTimelineInfo{});
 
         commitTransaction(layer.get());
         nsecs_t latchTime = 25;
diff --git a/services/surfaceflinger/tests/unittests/TransactionSurfaceFrameTest.cpp b/services/surfaceflinger/tests/unittests/TransactionSurfaceFrameTest.cpp
index 7dfbcc0..ae03db4 100644
--- a/services/surfaceflinger/tests/unittests/TransactionSurfaceFrameTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TransactionSurfaceFrameTest.cpp
@@ -131,7 +131,7 @@
         FrameTimelineInfo ftInfo;
         ftInfo.vsyncId = 1;
         ftInfo.inputEventId = 0;
-        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo);
         acquireFence->signalForTest(12);
 
         commitTransaction(layer.get());
@@ -166,7 +166,7 @@
         FrameTimelineInfo ftInfo;
         ftInfo.vsyncId = 1;
         ftInfo.inputEventId = 0;
-        layer->setBuffer(externalTexture1, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture1, bufferData, 10, 20, false, std::nullopt, ftInfo);
         EXPECT_EQ(0u, layer->mDrawingState.bufferlessSurfaceFramesTX.size());
         ASSERT_NE(nullptr, layer->mDrawingState.bufferSurfaceFrameTX);
         const auto droppedSurfaceFrame = layer->mDrawingState.bufferSurfaceFrameTX;
@@ -183,7 +183,7 @@
                                                          2ULL /* bufferId */,
                                                          HAL_PIXEL_FORMAT_RGBA_8888,
                                                          0ULL /*usage*/);
-        layer->setBuffer(externalTexture2, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture2, bufferData, 10, 20, false, std::nullopt, ftInfo);
         nsecs_t end = systemTime();
         acquireFence2->signalForTest(12);
 
@@ -229,7 +229,7 @@
                                                          1ULL /* bufferId */,
                                                          HAL_PIXEL_FORMAT_RGBA_8888,
                                                          0ULL /*usage*/);
-        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo);
         acquireFence->signalForTest(12);
 
         EXPECT_EQ(0u, layer->mDrawingState.bufferlessSurfaceFramesTX.size());
@@ -264,7 +264,7 @@
         FrameTimelineInfo ftInfo;
         ftInfo.vsyncId = 1;
         ftInfo.inputEventId = 0;
-        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo);
         EXPECT_EQ(0u, layer->mDrawingState.bufferlessSurfaceFramesTX.size());
         ASSERT_NE(nullptr, layer->mDrawingState.bufferSurfaceFrameTX);
 
@@ -307,7 +307,7 @@
         FrameTimelineInfo ftInfo3;
         ftInfo3.vsyncId = 3;
         ftInfo3.inputEventId = 0;
-        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo3, 0);
+        layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo3);
         EXPECT_EQ(2u, layer->mDrawingState.bufferlessSurfaceFramesTX.size());
         ASSERT_NE(nullptr, layer->mDrawingState.bufferSurfaceFrameTX);
         const auto bufferSurfaceFrameTX = layer->mDrawingState.bufferSurfaceFrameTX;
@@ -352,7 +352,7 @@
         FrameTimelineInfo ftInfo;
         ftInfo.vsyncId = 1;
         ftInfo.inputEventId = 0;
-        layer->setBuffer(externalTexture1, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture1, bufferData, 10, 20, false, std::nullopt, ftInfo);
         ASSERT_NE(nullptr, layer->mDrawingState.bufferSurfaceFrameTX);
         const auto droppedSurfaceFrame = layer->mDrawingState.bufferSurfaceFrameTX;
 
@@ -367,7 +367,7 @@
                                                          1ULL /* bufferId */,
                                                          HAL_PIXEL_FORMAT_RGBA_8888,
                                                          0ULL /*usage*/);
-        layer->setBuffer(externalTexture2, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture2, bufferData, 10, 20, false, std::nullopt, ftInfo);
         acquireFence2->signalForTest(12);
 
         ASSERT_NE(nullptr, layer->mDrawingState.bufferSurfaceFrameTX);
@@ -404,7 +404,7 @@
         FrameTimelineInfo ftInfo;
         ftInfo.vsyncId = 1;
         ftInfo.inputEventId = 0;
-        layer->setBuffer(externalTexture1, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+        layer->setBuffer(externalTexture1, bufferData, 10, 20, false, std::nullopt, ftInfo);
         EXPECT_EQ(0u, layer->mDrawingState.bufferlessSurfaceFramesTX.size());
         ASSERT_NE(nullptr, layer->mDrawingState.bufferSurfaceFrameTX);
         const auto droppedSurfaceFrame1 = layer->mDrawingState.bufferSurfaceFrameTX;
@@ -424,7 +424,7 @@
         FrameTimelineInfo ftInfoInv;
         ftInfoInv.vsyncId = FrameTimelineInfo::INVALID_VSYNC_ID;
         ftInfoInv.inputEventId = 0;
-        layer->setBuffer(externalTexture2, bufferData, 10, 20, false, std::nullopt, ftInfoInv, 0);
+        layer->setBuffer(externalTexture2, bufferData, 10, 20, false, std::nullopt, ftInfoInv);
         auto dropEndTime1 = systemTime();
         EXPECT_EQ(0u, layer->mDrawingState.bufferlessSurfaceFramesTX.size());
         ASSERT_NE(nullptr, layer->mDrawingState.bufferSurfaceFrameTX);
@@ -445,7 +445,7 @@
         FrameTimelineInfo ftInfo2;
         ftInfo2.vsyncId = 2;
         ftInfo2.inputEventId = 0;
-        layer->setBuffer(externalTexture3, bufferData, 10, 20, false, std::nullopt, ftInfo2, 0);
+        layer->setBuffer(externalTexture3, bufferData, 10, 20, false, std::nullopt, ftInfo2);
         auto dropEndTime2 = systemTime();
         acquireFence3->signalForTest(12);
 
@@ -494,7 +494,7 @@
             FrameTimelineInfo ftInfo;
             ftInfo.vsyncId = 1;
             ftInfo.inputEventId = 0;
-            layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo, 0);
+            layer->setBuffer(externalTexture, bufferData, 10, 20, false, std::nullopt, ftInfo);
             FrameTimelineInfo ftInfo2;
             ftInfo2.vsyncId = 2;
             ftInfo2.inputEventId = 0;
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockComposer.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockComposer.h
index 836e3a4..2f16b7b 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockComposer.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockComposer.h
@@ -98,6 +98,8 @@
                  Error(Display, nsecs_t, uint32_t*, uint32_t*, int*, uint32_t*));
     MOCK_METHOD4(setCursorPosition, Error(Display, Layer, int32_t, int32_t));
     MOCK_METHOD5(setLayerBuffer, Error(Display, Layer, uint32_t, const sp<GraphicBuffer>&, int));
+    MOCK_METHOD4(setLayerBufferSlotsToClear,
+                 Error(Display, Layer, const std::vector<uint32_t>&, uint32_t));
     MOCK_METHOD3(setLayerSurfaceDamage,
                  Error(Display, Layer, const std::vector<IComposerClient::Rect>&));
     MOCK_METHOD3(setLayerBlendMode, Error(Display, Layer, IComposerClient::BlendMode));
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h
index c78b6bd..3b36361 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h
@@ -38,4 +38,24 @@
     return createDisplayMode(modeId, refreshRate, {}, {}, displayId);
 }
 
+inline DisplayModePtr cloneForDisplay(PhysicalDisplayId displayId, const DisplayModePtr& modePtr) {
+    return DisplayMode::Builder(modePtr->getHwcId())
+            .setId(modePtr->getId())
+            .setPhysicalDisplayId(displayId)
+            .setVsyncPeriod(modePtr->getVsyncPeriod())
+            .setGroup(modePtr->getGroup())
+            .setResolution(modePtr->getResolution())
+            .build();
+}
+
+inline DisplayModes cloneForDisplay(PhysicalDisplayId displayId, const DisplayModes& modes) {
+    DisplayModes clones;
+
+    for (const auto& [id, modePtr] : modes) {
+        clones.try_emplace(id, cloneForDisplay(displayId, modePtr));
+    }
+
+    return clones;
+}
+
 } // namespace android::mock
diff --git a/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h b/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
index 0dee800..86fbadc 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
@@ -27,7 +27,7 @@
     TimeStats();
     ~TimeStats() override;
 
-    MOCK_METHOD2(onPullAtom, bool(const int, std::string*));
+    MOCK_METHOD2(onPullAtom, bool(const int, std::vector<uint8_t>*));
     MOCK_METHOD3(parseArgs, void(bool, const Vector<String16>&, std::string&));
     MOCK_METHOD0(isEnabled, bool());
     MOCK_METHOD0(miniDump, std::string());
diff --git a/vulkan/libvulkan/api_gen.cpp b/vulkan/libvulkan/api_gen.cpp
index df70bf4..a9706bc 100644
--- a/vulkan/libvulkan/api_gen.cpp
+++ b/vulkan/libvulkan/api_gen.cpp
@@ -682,6 +682,7 @@
         "vkGetPhysicalDeviceMemoryProperties2",
         "vkGetPhysicalDeviceMemoryProperties2KHR",
         "vkGetPhysicalDeviceMultisamplePropertiesEXT",
+        "vkGetPhysicalDeviceOpticalFlowImageFormatsNV",
         "vkGetPhysicalDevicePresentRectanglesKHR",
         "vkGetPhysicalDeviceProperties",
         "vkGetPhysicalDeviceProperties2",
diff --git a/vulkan/libvulkan/driver.cpp b/vulkan/libvulkan/driver.cpp
index a99355f..273cdd5 100644
--- a/vulkan/libvulkan/driver.cpp
+++ b/vulkan/libvulkan/driver.cpp
@@ -636,6 +636,7 @@
             case ProcHook::EXT_swapchain_colorspace:
             case ProcHook::KHR_get_surface_capabilities2:
             case ProcHook::GOOGLE_surfaceless_query:
+            case ProcHook::EXT_surface_maintenance1:
                 hook_extensions_.set(ext_bit);
                 // return now as these extensions do not require HAL support
                 return;
@@ -657,9 +658,11 @@
             case ProcHook::KHR_shared_presentable_image:
             case ProcHook::KHR_swapchain:
             case ProcHook::EXT_hdr_metadata:
+            case ProcHook::EXT_swapchain_maintenance1:
             case ProcHook::ANDROID_external_memory_android_hardware_buffer:
             case ProcHook::ANDROID_native_buffer:
             case ProcHook::GOOGLE_display_timing:
+            case ProcHook::KHR_external_fence_fd:
             case ProcHook::EXTENSION_CORE_1_0:
             case ProcHook::EXTENSION_CORE_1_1:
             case ProcHook::EXTENSION_CORE_1_2:
@@ -690,16 +693,22 @@
                 ext_bit = ProcHook::ANDROID_native_buffer;
                 break;
             case ProcHook::KHR_incremental_present:
-            case ProcHook::GOOGLE_display_timing:
             case ProcHook::KHR_shared_presentable_image:
+            case ProcHook::GOOGLE_display_timing:
                 hook_extensions_.set(ext_bit);
                 // return now as these extensions do not require HAL support
                 return;
+            case ProcHook::EXT_swapchain_maintenance1:
+                // map VK_KHR_swapchain_maintenance1 to KHR_external_fence_fd
+                name = VK_KHR_EXTERNAL_FENCE_FD_EXTENSION_NAME;
+                ext_bit = ProcHook::KHR_external_fence_fd;
+                break;
             case ProcHook::EXT_hdr_metadata:
             case ProcHook::KHR_bind_memory2:
                 hook_extensions_.set(ext_bit);
                 break;
             case ProcHook::ANDROID_external_memory_android_hardware_buffer:
+            case ProcHook::KHR_external_fence_fd:
             case ProcHook::EXTENSION_UNKNOWN:
                 // Extensions we don't need to do anything about at this level
                 break;
@@ -715,6 +724,7 @@
             case ProcHook::KHR_surface_protected_capabilities:
             case ProcHook::EXT_debug_report:
             case ProcHook::EXT_swapchain_colorspace:
+            case ProcHook::EXT_surface_maintenance1:
             case ProcHook::GOOGLE_surfaceless_query:
             case ProcHook::ANDROID_native_buffer:
             case ProcHook::EXTENSION_CORE_1_0:
@@ -747,10 +757,18 @@
         if (strcmp(name, props.extensionName) != 0)
             continue;
 
+        if (ext_bit != ProcHook::EXTENSION_UNKNOWN &&
+                hal_extensions_.test(ext_bit)) {
+            ALOGI("CreateInfoWrapper::FilterExtension: already have '%s'.", name);
+            continue;
+        }
+
         filter.names[filter.name_count++] = name;
         if (ext_bit != ProcHook::EXTENSION_UNKNOWN) {
             if (ext_bit == ProcHook::ANDROID_native_buffer)
                 hook_extensions_.set(ProcHook::KHR_swapchain);
+            if (ext_bit == ProcHook::KHR_external_fence_fd)
+                hook_extensions_.set(ProcHook::EXT_swapchain_maintenance1);
 
             hal_extensions_.set(ext_bit);
         }
@@ -940,6 +958,9 @@
          VK_KHR_GET_SURFACE_CAPABILITIES_2_SPEC_VERSION});
     loader_extensions.push_back({VK_GOOGLE_SURFACELESS_QUERY_EXTENSION_NAME,
                                  VK_GOOGLE_SURFACELESS_QUERY_SPEC_VERSION});
+    loader_extensions.push_back({
+        VK_EXT_SURFACE_MAINTENANCE_1_EXTENSION_NAME,
+        VK_EXT_SURFACE_MAINTENANCE_1_SPEC_VERSION});
 
     static const VkExtensionProperties loader_debug_report_extension = {
         VK_EXT_DEBUG_REPORT_EXTENSION_NAME, VK_EXT_DEBUG_REPORT_SPEC_VERSION,
@@ -1072,6 +1093,33 @@
     return result;
 }
 
+bool CanSupportSwapchainMaintenance1Extension(VkPhysicalDevice physicalDevice) {
+    const auto& driver = GetData(physicalDevice).driver;
+    if (!driver.GetPhysicalDeviceExternalFenceProperties)
+        return false;
+
+    // Requires support for external fences imported from sync fds.
+    // This is _almost_ universal on Android, but may be missing on
+    // some extremely old drivers, or on strange implementations like
+    // cuttlefish.
+    VkPhysicalDeviceExternalFenceInfo fenceInfo = {
+        VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_FENCE_INFO,
+        nullptr,
+        VK_EXTERNAL_FENCE_HANDLE_TYPE_SYNC_FD_BIT
+    };
+    VkExternalFenceProperties fenceProperties = {
+        VK_STRUCTURE_TYPE_EXTERNAL_FENCE_PROPERTIES,
+        nullptr,
+        0, 0, 0
+    };
+
+    GetPhysicalDeviceExternalFenceProperties(physicalDevice, &fenceInfo, &fenceProperties);
+    if (fenceProperties.externalFenceFeatures & VK_EXTERNAL_FENCE_FEATURE_IMPORTABLE_BIT)
+        return true;
+
+    return false;
+}
+
 VkResult EnumerateDeviceExtensionProperties(
     VkPhysicalDevice physicalDevice,
     const char* pLayerName,
@@ -1149,6 +1197,12 @@
              VK_EXT_IMAGE_COMPRESSION_CONTROL_SWAPCHAIN_SPEC_VERSION});
     }
 
+    if (CanSupportSwapchainMaintenance1Extension(physicalDevice)) {
+        loader_extensions.push_back({
+                VK_EXT_SWAPCHAIN_MAINTENANCE_1_EXTENSION_NAME,
+                VK_EXT_SWAPCHAIN_MAINTENANCE_1_SPEC_VERSION});
+    }
+
     // enumerate our extensions first
     if (!pLayerName && pProperties) {
         uint32_t count = std::min(
@@ -1266,6 +1320,27 @@
         return VK_ERROR_INCOMPATIBLE_DRIVER;
     }
 
+    // TODO(b/259516419) avoid getting stats from hwui
+    // const bool reportStats = (pCreateInfo->pApplicationInfo == nullptr )
+    //         || (strcmp("android framework",
+    //         pCreateInfo->pApplicationInfo->pEngineName) != 0);
+    const bool reportStats = true;
+    if (reportStats) {
+        // Set stats for Vulkan api version requested with application info
+        if (pCreateInfo->pApplicationInfo) {
+            const uint32_t vulkanApiVersion =
+                pCreateInfo->pApplicationInfo->apiVersion;
+            android::GraphicsEnv::getInstance().setTargetStats(
+                android::GpuStatsInfo::Stats::CREATED_VULKAN_API_VERSION,
+                vulkanApiVersion);
+        }
+
+        // Update stats for the extensions requested
+        android::GraphicsEnv::getInstance().setVulkanInstanceExtensions(
+            pCreateInfo->enabledExtensionCount,
+            pCreateInfo->ppEnabledExtensionNames);
+    }
+
     *pInstance = instance;
 
     return VK_SUCCESS;
@@ -1371,6 +1446,65 @@
 
     *pDevice = dev;
 
+    // TODO(b/259516419) avoid getting stats from hwui
+    const bool reportStats = true;
+    if (reportStats) {
+        android::GraphicsEnv::getInstance().setTargetStats(
+            android::GpuStatsInfo::Stats::CREATED_VULKAN_DEVICE);
+
+        // Set stats for creating a Vulkan device and report features in use
+        const VkPhysicalDeviceFeatures* pEnabledFeatures =
+            pCreateInfo->pEnabledFeatures;
+        if (!pEnabledFeatures) {
+            // Use features from the chained VkPhysicalDeviceFeatures2
+            // structure, if given
+            const VkPhysicalDeviceFeatures2* features2 =
+                reinterpret_cast<const VkPhysicalDeviceFeatures2*>(
+                    pCreateInfo->pNext);
+            while (features2 &&
+                   features2->sType !=
+                       VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2) {
+                features2 = reinterpret_cast<const VkPhysicalDeviceFeatures2*>(
+                    features2->pNext);
+            }
+            if (features2) {
+                pEnabledFeatures = &features2->features;
+            }
+        }
+        const VkBool32* pFeatures =
+            reinterpret_cast<const VkBool32*>(pEnabledFeatures);
+        if (pFeatures) {
+            // VkPhysicalDeviceFeatures consists of VkBool32 values, go over all
+            // of them using pointer arithmetic here and save the features in a
+            // 64-bit bitfield
+            static_assert(
+                (sizeof(VkPhysicalDeviceFeatures) / sizeof(VkBool32)) <= 64,
+                "VkPhysicalDeviceFeatures has too many elements for bitfield "
+                "packing");
+            static_assert(
+                (sizeof(VkPhysicalDeviceFeatures) % sizeof(VkBool32)) == 0,
+                "VkPhysicalDeviceFeatures has invalid size for bitfield "
+                "packing");
+            const int numFeatures =
+                sizeof(VkPhysicalDeviceFeatures) / sizeof(VkBool32);
+
+            uint64_t enableFeatureBits = 0;
+            for (int i = 0; i < numFeatures; i++) {
+                if (pFeatures[i] != VK_FALSE) {
+                    enableFeatureBits |= (uint64_t(1) << i);
+                }
+            }
+            android::GraphicsEnv::getInstance().setTargetStats(
+                android::GpuStatsInfo::Stats::VULKAN_DEVICE_FEATURES_ENABLED,
+                enableFeatureBits);
+        }
+
+        // Update stats for the extensions requested
+        android::GraphicsEnv::getInstance().setVulkanDeviceExtensions(
+            pCreateInfo->enabledExtensionCount,
+            pCreateInfo->ppEnabledExtensionNames);
+    }
+
     return VK_SUCCESS;
 }
 
@@ -1564,6 +1698,12 @@
                 imageCompressionControlSwapchainInChain = true;
             } break;
 
+            case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SWAPCHAIN_MAINTENANCE_1_FEATURES_EXT: {
+                auto smf = reinterpret_cast<VkPhysicalDeviceSwapchainMaintenance1FeaturesEXT *>(
+                        pFeats);
+                smf->swapchainMaintenance1 = true;
+            } break;
+
             default:
                 break;
         }
diff --git a/vulkan/libvulkan/driver_gen.cpp b/vulkan/libvulkan/driver_gen.cpp
index de98aa7..798af5c 100644
--- a/vulkan/libvulkan/driver_gen.cpp
+++ b/vulkan/libvulkan/driver_gen.cpp
@@ -162,6 +162,15 @@
     }
 }
 
+VKAPI_ATTR VkResult checkedReleaseSwapchainImagesEXT(VkDevice device, const VkReleaseSwapchainImagesInfoEXT* pReleaseInfo) {
+    if (GetData(device).hook_extensions[ProcHook::EXT_swapchain_maintenance1]) {
+        return ReleaseSwapchainImagesEXT(device, pReleaseInfo);
+    } else {
+        Logger(device).Err(device, "VK_EXT_swapchain_maintenance1 not enabled. vkReleaseSwapchainImagesEXT not executed.");
+        return VK_SUCCESS;
+    }
+}
+
 // clang-format on
 
 const ProcHook g_proc_hooks[] = {
@@ -545,6 +554,13 @@
         nullptr,
     },
     {
+        "vkReleaseSwapchainImagesEXT",
+        ProcHook::DEVICE,
+        ProcHook::EXT_swapchain_maintenance1,
+        reinterpret_cast<PFN_vkVoidFunction>(ReleaseSwapchainImagesEXT),
+        reinterpret_cast<PFN_vkVoidFunction>(checkedReleaseSwapchainImagesEXT),
+    },
+    {
         "vkSetHdrMetadataEXT",
         ProcHook::DEVICE,
         ProcHook::EXT_hdr_metadata,
@@ -580,6 +596,8 @@
     if (strcmp(name, "VK_KHR_surface") == 0) return ProcHook::KHR_surface;
     if (strcmp(name, "VK_KHR_surface_protected_capabilities") == 0) return ProcHook::KHR_surface_protected_capabilities;
     if (strcmp(name, "VK_KHR_swapchain") == 0) return ProcHook::KHR_swapchain;
+    if (strcmp(name, "VK_EXT_swapchain_maintenance1") == 0) return ProcHook::EXT_swapchain_maintenance1;
+    if (strcmp(name, "VK_EXT_surface_maintenance1") == 0) return ProcHook::EXT_surface_maintenance1;
     if (strcmp(name, "VK_ANDROID_external_memory_android_hardware_buffer") == 0) return ProcHook::ANDROID_external_memory_android_hardware_buffer;
     if (strcmp(name, "VK_KHR_bind_memory2") == 0) return ProcHook::KHR_bind_memory2;
     if (strcmp(name, "VK_KHR_get_physical_device_properties2") == 0) return ProcHook::KHR_get_physical_device_properties2;
@@ -587,6 +605,7 @@
     if (strcmp(name, "VK_KHR_external_memory_capabilities") == 0) return ProcHook::KHR_external_memory_capabilities;
     if (strcmp(name, "VK_KHR_external_semaphore_capabilities") == 0) return ProcHook::KHR_external_semaphore_capabilities;
     if (strcmp(name, "VK_KHR_external_fence_capabilities") == 0) return ProcHook::KHR_external_fence_capabilities;
+    if (strcmp(name, "VK_KHR_external_fence_fd") == 0) return ProcHook::KHR_external_fence_fd;
     // clang-format on
     return ProcHook::EXTENSION_UNKNOWN;
 }
@@ -666,6 +685,7 @@
     INIT_PROC(true, dev, CreateImage);
     INIT_PROC(true, dev, DestroyImage);
     INIT_PROC(true, dev, AllocateCommandBuffers);
+    INIT_PROC_EXT(KHR_external_fence_fd, true, dev, ImportFenceFdKHR);
     INIT_PROC(false, dev, BindImageMemory2);
     INIT_PROC_EXT(KHR_bind_memory2, true, dev, BindImageMemory2KHR);
     INIT_PROC(false, dev, GetDeviceQueue2);
diff --git a/vulkan/libvulkan/driver_gen.h b/vulkan/libvulkan/driver_gen.h
index 2f60086..31ba04b 100644
--- a/vulkan/libvulkan/driver_gen.h
+++ b/vulkan/libvulkan/driver_gen.h
@@ -49,6 +49,8 @@
         KHR_surface,
         KHR_surface_protected_capabilities,
         KHR_swapchain,
+        EXT_swapchain_maintenance1,
+        EXT_surface_maintenance1,
         ANDROID_external_memory_android_hardware_buffer,
         KHR_bind_memory2,
         KHR_get_physical_device_properties2,
@@ -56,6 +58,7 @@
         KHR_external_memory_capabilities,
         KHR_external_semaphore_capabilities,
         KHR_external_fence_capabilities,
+        KHR_external_fence_fd,
 
         EXTENSION_CORE_1_0,
         EXTENSION_CORE_1_1,
@@ -118,6 +121,7 @@
     PFN_vkCreateImage CreateImage;
     PFN_vkDestroyImage DestroyImage;
     PFN_vkAllocateCommandBuffers AllocateCommandBuffers;
+    PFN_vkImportFenceFdKHR ImportFenceFdKHR;
     PFN_vkBindImageMemory2 BindImageMemory2;
     PFN_vkBindImageMemory2KHR BindImageMemory2KHR;
     PFN_vkGetDeviceQueue2 GetDeviceQueue2;
diff --git a/vulkan/libvulkan/swapchain.cpp b/vulkan/libvulkan/swapchain.cpp
index 759149d..1bff50d 100644
--- a/vulkan/libvulkan/swapchain.cpp
+++ b/vulkan/libvulkan/swapchain.cpp
@@ -243,6 +243,11 @@
 // syncronous requests to Surface Flinger):
 enum { MIN_NUM_FRAMES_AGO = 5 };
 
+bool IsSharedPresentMode(VkPresentModeKHR mode) {
+    return mode == VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR ||
+        mode == VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR;
+}
+
 struct Swapchain {
     Swapchain(Surface& surface_,
               uint32_t num_images_,
@@ -254,9 +259,7 @@
           pre_transform(pre_transform_),
           frame_timestamps_enabled(false),
           acquire_next_image_timeout(-1),
-          shared(present_mode == VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR ||
-                 present_mode ==
-                     VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR) {
+          shared(IsSharedPresentMode(present_mode)) {
         ANativeWindow* window = surface.window.get();
         native_window_get_refresh_cycle_duration(
             window,
@@ -288,6 +291,9 @@
               release_fence(-1),
               dequeued(false) {}
         VkImage image;
+        // If the image is bound to memory, an sp to the underlying gralloc buffer.
+        // Otherwise, nullptr; the image will be bound to memory as part of
+        // AcquireNextImage.
         android::sp<ANativeWindowBuffer> buffer;
         // The fence is only valid when the buffer is dequeued, and should be
         // -1 any other time. When valid, we own the fd, and must ensure it is
@@ -508,6 +514,10 @@
         case VK_FORMAT_R8_UNORM:
             native_format = android::PIXEL_FORMAT_R_8;
             break;
+        // TODO: Do we need to query for VK_EXT_rgba10x6_formats here?
+        case VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16:
+            native_format = android::PIXEL_FORMAT_RGBA_10101010;
+            break;
         default:
             ALOGV("unsupported swapchain format %d", format);
             break;
@@ -649,100 +659,40 @@
     VkSurfaceCapabilitiesKHR* capabilities) {
     ATRACE_CALL();
 
-    int err;
-    int width, height;
-    int transform_hint;
-    int max_buffer_count;
-    if (surface == VK_NULL_HANDLE) {
-        const InstanceData& instance_data = GetData(pdev);
-        ProcHook::Extension surfaceless = ProcHook::GOOGLE_surfaceless_query;
-        bool surfaceless_enabled =
-            instance_data.hook_extensions.test(surfaceless);
-        if (!surfaceless_enabled) {
-            // It is an error to pass a surface==VK_NULL_HANDLE unless the
-            // VK_GOOGLE_surfaceless_query extension is enabled
-            return VK_ERROR_SURFACE_LOST_KHR;
-        }
-        // Support for VK_GOOGLE_surfaceless_query.  The primary purpose of this
-        // extension for this function is for
-        // VkSurfaceProtectedCapabilitiesKHR::supportsProtected.  The following
-        // four values cannot be known without a surface.  Default values will
-        // be supplied anyway, but cannot be relied upon.
-        width = 0xFFFFFFFF;
-        height = 0xFFFFFFFF;
-        transform_hint = VK_SURFACE_TRANSFORM_INHERIT_BIT_KHR;
-        capabilities->minImageCount = 0xFFFFFFFF;
-        capabilities->maxImageCount = 0xFFFFFFFF;
+    // Implement in terms of GetPhysicalDeviceSurfaceCapabilities2KHR
+
+    VkPhysicalDeviceSurfaceInfo2KHR info2 = {
+        VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SURFACE_INFO_2_KHR,
+        nullptr,
+        surface
+    };
+
+    VkSurfaceCapabilities2KHR caps2 = {
+        VK_STRUCTURE_TYPE_SURFACE_CAPABILITIES_2_KHR,
+        nullptr,
+        {},
+    };
+
+    VkResult result = GetPhysicalDeviceSurfaceCapabilities2KHR(pdev, &info2, &caps2);
+    *capabilities = caps2.surfaceCapabilities;
+    return result;
+}
+
+// Does the call-twice and VK_INCOMPLETE handling for querying lists
+// of things, where we already have the full set built in a vector.
+template <typename T>
+VkResult CopyWithIncomplete(std::vector<T> const& things,
+        T* callerPtr, uint32_t* callerCount) {
+    VkResult result = VK_SUCCESS;
+    if (callerPtr) {
+        if (things.size() > *callerCount)
+            result = VK_INCOMPLETE;
+        *callerCount = std::min(uint32_t(things.size()), *callerCount);
+        std::copy(things.begin(), things.begin() + *callerCount, callerPtr);
     } else {
-        ANativeWindow* window = SurfaceFromHandle(surface)->window.get();
-
-        err = window->query(window, NATIVE_WINDOW_DEFAULT_WIDTH, &width);
-        if (err != android::OK) {
-            ALOGE("NATIVE_WINDOW_DEFAULT_WIDTH query failed: %s (%d)",
-                  strerror(-err), err);
-            return VK_ERROR_SURFACE_LOST_KHR;
-        }
-        err = window->query(window, NATIVE_WINDOW_DEFAULT_HEIGHT, &height);
-        if (err != android::OK) {
-            ALOGE("NATIVE_WINDOW_DEFAULT_WIDTH query failed: %s (%d)",
-                  strerror(-err), err);
-            return VK_ERROR_SURFACE_LOST_KHR;
-        }
-
-        err = window->query(window, NATIVE_WINDOW_TRANSFORM_HINT,
-                            &transform_hint);
-        if (err != android::OK) {
-            ALOGE("NATIVE_WINDOW_TRANSFORM_HINT query failed: %s (%d)",
-                  strerror(-err), err);
-            return VK_ERROR_SURFACE_LOST_KHR;
-        }
-
-        err = window->query(window, NATIVE_WINDOW_MAX_BUFFER_COUNT,
-                            &max_buffer_count);
-        if (err != android::OK) {
-            ALOGE("NATIVE_WINDOW_MAX_BUFFER_COUNT query failed: %s (%d)",
-                  strerror(-err), err);
-            return VK_ERROR_SURFACE_LOST_KHR;
-        }
-        capabilities->minImageCount = std::min(max_buffer_count, 3);
-        capabilities->maxImageCount = static_cast<uint32_t>(max_buffer_count);
+        *callerCount = things.size();
     }
-
-    capabilities->currentExtent =
-        VkExtent2D{static_cast<uint32_t>(width), static_cast<uint32_t>(height)};
-
-    // TODO(http://b/134182502): Figure out what the max extent should be.
-    capabilities->minImageExtent = VkExtent2D{1, 1};
-    capabilities->maxImageExtent = VkExtent2D{4096, 4096};
-
-    if (capabilities->maxImageExtent.height <
-        capabilities->currentExtent.height) {
-        capabilities->maxImageExtent.height =
-            capabilities->currentExtent.height;
-    }
-
-    if (capabilities->maxImageExtent.width <
-        capabilities->currentExtent.width) {
-        capabilities->maxImageExtent.width = capabilities->currentExtent.width;
-    }
-
-    capabilities->maxImageArrayLayers = 1;
-
-    capabilities->supportedTransforms = kSupportedTransforms;
-    capabilities->currentTransform =
-        TranslateNativeToVulkanTransform(transform_hint);
-
-    // On Android, window composition is a WindowManager property, not something
-    // associated with the bufferqueue. It can't be changed from here.
-    capabilities->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR;
-
-    capabilities->supportedUsageFlags =
-        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
-        VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT |
-        VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT |
-        VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT;
-
-    return VK_SUCCESS;
+    return result;
 }
 
 VKAPI_ATTR
@@ -855,25 +805,27 @@
         }
     }
 
+    // TODO query VK_EXT_rgba10x6_formats support
+    desc.format = AHARDWAREBUFFER_FORMAT_R10G10B10A10_UNORM;
+    if (AHardwareBuffer_isSupported(&desc)) {
+        all_formats.emplace_back(
+            VkSurfaceFormatKHR{VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16,
+                               VK_COLOR_SPACE_SRGB_NONLINEAR_KHR});
+        if (colorspace_ext) {
+            all_formats.emplace_back(
+                VkSurfaceFormatKHR{VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16,
+                                   VK_COLOR_SPACE_PASS_THROUGH_EXT});
+            all_formats.emplace_back(
+                VkSurfaceFormatKHR{VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16,
+                                   VK_COLOR_SPACE_DISPLAY_P3_NONLINEAR_EXT});
+        }
+    }
+
     // NOTE: Any new formats that are added must be coordinated across different
     // Android users.  This includes the ANGLE team (a layered implementation of
     // OpenGL-ES).
 
-    VkResult result = VK_SUCCESS;
-    if (formats) {
-        uint32_t transfer_count = all_formats.size();
-        if (transfer_count > *count) {
-            transfer_count = *count;
-            result = VK_INCOMPLETE;
-        }
-        std::copy(all_formats.begin(), all_formats.begin() + transfer_count,
-                  formats);
-        *count = transfer_count;
-    } else {
-        *count = all_formats.size();
-    }
-
-    return result;
+    return CopyWithIncomplete(all_formats, formats, count);
 }
 
 VKAPI_ATTR
@@ -883,19 +835,134 @@
     VkSurfaceCapabilities2KHR* pSurfaceCapabilities) {
     ATRACE_CALL();
 
-    VkResult result = GetPhysicalDeviceSurfaceCapabilitiesKHR(
-        physicalDevice, pSurfaceInfo->surface,
-        &pSurfaceCapabilities->surfaceCapabilities);
+    auto surface = pSurfaceInfo->surface;
+    auto capabilities = &pSurfaceCapabilities->surfaceCapabilities;
 
-    VkSurfaceCapabilities2KHR* caps = pSurfaceCapabilities;
-    while (caps->pNext) {
-        caps = reinterpret_cast<VkSurfaceCapabilities2KHR*>(caps->pNext);
+    VkSurfacePresentModeEXT const *pPresentMode = nullptr;
+    for (auto pNext = reinterpret_cast<VkBaseInStructure const *>(pSurfaceInfo->pNext);
+            pNext; pNext = reinterpret_cast<VkBaseInStructure const *>(pNext->pNext)) {
+        switch (pNext->sType) {
+            case VK_STRUCTURE_TYPE_SURFACE_PRESENT_MODE_EXT:
+                pPresentMode = reinterpret_cast<VkSurfacePresentModeEXT const *>(pNext);
+                break;
 
-        switch (caps->sType) {
+            default:
+                break;
+        }
+    }
+
+    int err;
+    int width, height;
+    int transform_hint;
+    int max_buffer_count;
+    if (surface == VK_NULL_HANDLE) {
+        const InstanceData& instance_data = GetData(physicalDevice);
+        ProcHook::Extension surfaceless = ProcHook::GOOGLE_surfaceless_query;
+        bool surfaceless_enabled =
+            instance_data.hook_extensions.test(surfaceless);
+        if (!surfaceless_enabled) {
+            // It is an error to pass a surface==VK_NULL_HANDLE unless the
+            // VK_GOOGLE_surfaceless_query extension is enabled
+            return VK_ERROR_SURFACE_LOST_KHR;
+        }
+        // Support for VK_GOOGLE_surfaceless_query.  The primary purpose of this
+        // extension for this function is for
+        // VkSurfaceProtectedCapabilitiesKHR::supportsProtected.  The following
+        // four values cannot be known without a surface.  Default values will
+        // be supplied anyway, but cannot be relied upon.
+        width = 0xFFFFFFFF;
+        height = 0xFFFFFFFF;
+        transform_hint = VK_SURFACE_TRANSFORM_INHERIT_BIT_KHR;
+        capabilities->minImageCount = 0xFFFFFFFF;
+        capabilities->maxImageCount = 0xFFFFFFFF;
+    } else {
+        ANativeWindow* window = SurfaceFromHandle(surface)->window.get();
+
+        err = window->query(window, NATIVE_WINDOW_DEFAULT_WIDTH, &width);
+        if (err != android::OK) {
+            ALOGE("NATIVE_WINDOW_DEFAULT_WIDTH query failed: %s (%d)",
+                  strerror(-err), err);
+            return VK_ERROR_SURFACE_LOST_KHR;
+        }
+        err = window->query(window, NATIVE_WINDOW_DEFAULT_HEIGHT, &height);
+        if (err != android::OK) {
+            ALOGE("NATIVE_WINDOW_DEFAULT_WIDTH query failed: %s (%d)",
+                  strerror(-err), err);
+            return VK_ERROR_SURFACE_LOST_KHR;
+        }
+
+        err = window->query(window, NATIVE_WINDOW_TRANSFORM_HINT,
+                            &transform_hint);
+        if (err != android::OK) {
+            ALOGE("NATIVE_WINDOW_TRANSFORM_HINT query failed: %s (%d)",
+                  strerror(-err), err);
+            return VK_ERROR_SURFACE_LOST_KHR;
+        }
+
+        err = window->query(window, NATIVE_WINDOW_MAX_BUFFER_COUNT,
+                            &max_buffer_count);
+        if (err != android::OK) {
+            ALOGE("NATIVE_WINDOW_MAX_BUFFER_COUNT query failed: %s (%d)",
+                  strerror(-err), err);
+            return VK_ERROR_SURFACE_LOST_KHR;
+        }
+
+        if (pPresentMode && IsSharedPresentMode(pPresentMode->presentMode)) {
+            capabilities->minImageCount = 1;
+            capabilities->maxImageCount = 1;
+        } else if (pPresentMode && pPresentMode->presentMode == VK_PRESENT_MODE_MAILBOX_KHR) {
+            // TODO: use undequeued buffer requirement for more precise bound
+            capabilities->minImageCount = std::min(max_buffer_count, 4);
+            capabilities->maxImageCount = static_cast<uint32_t>(max_buffer_count);
+        } else {
+            // TODO: if we're able to, provide better bounds on the number of buffers
+            // for other modes as well.
+            capabilities->minImageCount = std::min(max_buffer_count, 3);
+            capabilities->maxImageCount = static_cast<uint32_t>(max_buffer_count);
+        }
+    }
+
+    capabilities->currentExtent =
+        VkExtent2D{static_cast<uint32_t>(width), static_cast<uint32_t>(height)};
+
+    // TODO(http://b/134182502): Figure out what the max extent should be.
+    capabilities->minImageExtent = VkExtent2D{1, 1};
+    capabilities->maxImageExtent = VkExtent2D{4096, 4096};
+
+    if (capabilities->maxImageExtent.height <
+        capabilities->currentExtent.height) {
+        capabilities->maxImageExtent.height =
+            capabilities->currentExtent.height;
+    }
+
+    if (capabilities->maxImageExtent.width <
+        capabilities->currentExtent.width) {
+        capabilities->maxImageExtent.width = capabilities->currentExtent.width;
+    }
+
+    capabilities->maxImageArrayLayers = 1;
+
+    capabilities->supportedTransforms = kSupportedTransforms;
+    capabilities->currentTransform =
+        TranslateNativeToVulkanTransform(transform_hint);
+
+    // On Android, window composition is a WindowManager property, not something
+    // associated with the bufferqueue. It can't be changed from here.
+    capabilities->supportedCompositeAlpha = VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR;
+
+    capabilities->supportedUsageFlags =
+        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
+        VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT |
+        VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT |
+        VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT;
+
+    for (auto pNext = reinterpret_cast<VkBaseOutStructure*>(pSurfaceCapabilities->pNext);
+            pNext; pNext = reinterpret_cast<VkBaseOutStructure*>(pNext->pNext)) {
+
+        switch (pNext->sType) {
             case VK_STRUCTURE_TYPE_SHARED_PRESENT_SURFACE_CAPABILITIES_KHR: {
                 VkSharedPresentSurfaceCapabilitiesKHR* shared_caps =
-                    reinterpret_cast<VkSharedPresentSurfaceCapabilitiesKHR*>(
-                        caps);
+                    reinterpret_cast<VkSharedPresentSurfaceCapabilitiesKHR*>(pNext);
                 // Claim same set of usage flags are supported for
                 // shared present modes as for other modes.
                 shared_caps->sharedPresentSupportedUsageFlags =
@@ -905,17 +972,64 @@
 
             case VK_STRUCTURE_TYPE_SURFACE_PROTECTED_CAPABILITIES_KHR: {
                 VkSurfaceProtectedCapabilitiesKHR* protected_caps =
-                    reinterpret_cast<VkSurfaceProtectedCapabilitiesKHR*>(caps);
+                    reinterpret_cast<VkSurfaceProtectedCapabilitiesKHR*>(pNext);
                 protected_caps->supportsProtected = VK_TRUE;
             } break;
 
+            case VK_STRUCTURE_TYPE_SURFACE_PRESENT_SCALING_CAPABILITIES_EXT: {
+                VkSurfacePresentScalingCapabilitiesEXT* scaling_caps =
+                    reinterpret_cast<VkSurfacePresentScalingCapabilitiesEXT*>(pNext);
+                // By default, Android stretches the buffer to fit the window,
+                // without preserving aspect ratio. Other modes are technically possible
+                // but consult with CoGS team before exposing them here!
+                scaling_caps->supportedPresentScaling = VK_PRESENT_SCALING_STRETCH_BIT_EXT;
+
+                // Since we always scale, we don't support any gravity.
+                scaling_caps->supportedPresentGravityX = 0;
+                scaling_caps->supportedPresentGravityY = 0;
+
+                // Scaled image limits are just the basic image limits
+                scaling_caps->minScaledImageExtent = capabilities->minImageExtent;
+                scaling_caps->maxScaledImageExtent = capabilities->maxImageExtent;
+            } break;
+
+            case VK_STRUCTURE_TYPE_SURFACE_PRESENT_MODE_COMPATIBILITY_EXT: {
+                VkSurfacePresentModeCompatibilityEXT* mode_caps =
+                    reinterpret_cast<VkSurfacePresentModeCompatibilityEXT*>(pNext);
+
+                ALOG_ASSERT(pPresentMode,
+                        "querying VkSurfacePresentModeCompatibilityEXT "
+                        "requires VkSurfacePresentModeEXT to be provided");
+                std::vector<VkPresentModeKHR> compatibleModes;
+                compatibleModes.push_back(pPresentMode->presentMode);
+
+                switch (pPresentMode->presentMode) {
+                    // Shared modes are both compatible with each other.
+                    case VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR:
+                        compatibleModes.push_back(VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR);
+                        break;
+                    case VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR:
+                        compatibleModes.push_back(VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR);
+                        break;
+                    default:
+                        // Other modes are only compatible with themselves.
+                        // TODO: consider whether switching between FIFO and MAILBOX is reasonable
+                        break;
+                }
+
+                // Note: this does not generate VK_INCOMPLETE since we're nested inside
+                // a larger query and there would be no way to determine exactly where it came from.
+                CopyWithIncomplete(compatibleModes, mode_caps->pPresentModes,
+                        &mode_caps->presentModeCount);
+            } break;
+
             default:
                 // Ignore all other extension structs
                 break;
         }
     }
 
-    return result;
+    return VK_SUCCESS;
 }
 
 VKAPI_ATTR
@@ -1074,18 +1188,7 @@
         present_modes.push_back(VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR);
     }
 
-    uint32_t num_modes = uint32_t(present_modes.size());
-
-    VkResult result = VK_SUCCESS;
-    if (modes) {
-        if (*count < num_modes)
-            result = VK_INCOMPLETE;
-        *count = std::min(*count, num_modes);
-        std::copy_n(present_modes.data(), *count, modes);
-    } else {
-        *count = num_modes;
-    }
-    return result;
+    return CopyWithIncomplete(present_modes, modes, count);
 }
 
 VKAPI_ATTR
@@ -1371,8 +1474,7 @@
     }
 
     VkSwapchainImageUsageFlagsANDROID swapchain_image_usage = 0;
-    if (create_info->presentMode == VK_PRESENT_MODE_SHARED_DEMAND_REFRESH_KHR ||
-        create_info->presentMode == VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR) {
+    if (IsSharedPresentMode(create_info->presentMode)) {
         swapchain_image_usage |= VK_SWAPCHAIN_IMAGE_USAGE_SHARED_BIT_ANDROID;
         err = native_window_set_shared_buffer_mode(window, true);
         if (err != android::OK) {
@@ -1522,8 +1624,6 @@
     Swapchain* swapchain = new (mem)
         Swapchain(surface, num_images, create_info->presentMode,
                   TranslateVulkanToNativeTransform(create_info->preTransform));
-    // -- Dequeue all buffers and create a VkImage for each --
-    // Any failures during or after this must cancel the dequeued buffers.
 
     VkSwapchainImageCreateInfoANDROID swapchain_image_create = {
 #pragma clang diagnostic push
@@ -1540,13 +1640,18 @@
 #pragma clang diagnostic pop
         .pNext = &swapchain_image_create,
     };
+
     VkImageCreateInfo image_create = {
         .sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
-        .pNext = &image_native_buffer,
+        .pNext = nullptr,
         .flags = createProtectedSwapchain ? VK_IMAGE_CREATE_PROTECTED_BIT : 0u,
         .imageType = VK_IMAGE_TYPE_2D,
         .format = create_info->imageFormat,
-        .extent = {0, 0, 1},
+        .extent = {
+            create_info->imageExtent.width,
+            create_info->imageExtent.height,
+            1
+        },
         .mipLevels = 1,
         .arrayLayers = 1,
         .samples = VK_SAMPLE_COUNT_1_BIT,
@@ -1557,60 +1662,87 @@
         .pQueueFamilyIndices = create_info->pQueueFamilyIndices,
     };
 
-    for (uint32_t i = 0; i < num_images; i++) {
-        Swapchain::Image& img = swapchain->images[i];
+    // Note: don't do deferred allocation for shared present modes. There's only one buffer
+    // involved so very little benefit.
+    if ((create_info->flags & VK_SWAPCHAIN_CREATE_DEFERRED_MEMORY_ALLOCATION_BIT_EXT) &&
+            !IsSharedPresentMode(create_info->presentMode)) {
+        // Don't want to touch the underlying gralloc buffers yet;
+        // instead just create unbound VkImages which will later be bound to memory inside
+        // AcquireNextImage.
+        VkImageSwapchainCreateInfoKHR image_swapchain_create = {
+            .sType = VK_STRUCTURE_TYPE_IMAGE_SWAPCHAIN_CREATE_INFO_KHR,
+            .pNext = nullptr,
+            .swapchain = HandleFromSwapchain(swapchain),
+        };
+        image_create.pNext = &image_swapchain_create;
 
-        ANativeWindowBuffer* buffer;
-        err = window->dequeueBuffer(window, &buffer, &img.dequeue_fence);
-        if (err != android::OK) {
-            ALOGE("dequeueBuffer[%u] failed: %s (%d)", i, strerror(-err), err);
-            switch (-err) {
-                case ENOMEM:
-                    result = VK_ERROR_OUT_OF_DEVICE_MEMORY;
-                    break;
-                default:
-                    result = VK_ERROR_SURFACE_LOST_KHR;
-                    break;
+        for (uint32_t i = 0; i < num_images; i++) {
+            Swapchain::Image& img = swapchain->images[i];
+            img.buffer = nullptr;
+            img.dequeued = false;
+
+            result = dispatch.CreateImage(device, &image_create, nullptr, &img.image);
+            if (result != VK_SUCCESS) {
+                ALOGD("vkCreateImage w/ for deferred swapchain image failed: %u", result);
+                break;
             }
-            break;
         }
-        img.buffer = buffer;
-        img.dequeued = true;
+    } else {
+        // -- Dequeue all buffers and create a VkImage for each --
+        // Any failures during or after this must cancel the dequeued buffers.
 
-        image_create.extent =
-            VkExtent3D{static_cast<uint32_t>(img.buffer->width),
-                       static_cast<uint32_t>(img.buffer->height),
-                       1};
-        image_native_buffer.handle = img.buffer->handle;
-        image_native_buffer.stride = img.buffer->stride;
-        image_native_buffer.format = img.buffer->format;
-        image_native_buffer.usage = int(img.buffer->usage);
-        android_convertGralloc0To1Usage(int(img.buffer->usage),
-            &image_native_buffer.usage2.producer,
-            &image_native_buffer.usage2.consumer);
-        image_native_buffer.usage3 = img.buffer->usage;
+        for (uint32_t i = 0; i < num_images; i++) {
+            Swapchain::Image& img = swapchain->images[i];
 
-        ATRACE_BEGIN("CreateImage");
-        result =
-            dispatch.CreateImage(device, &image_create, nullptr, &img.image);
-        ATRACE_END();
-        if (result != VK_SUCCESS) {
-            ALOGD("vkCreateImage w/ native buffer failed: %u", result);
-            break;
+            ANativeWindowBuffer* buffer;
+            err = window->dequeueBuffer(window, &buffer, &img.dequeue_fence);
+            if (err != android::OK) {
+                ALOGE("dequeueBuffer[%u] failed: %s (%d)", i, strerror(-err), err);
+                switch (-err) {
+                    case ENOMEM:
+                        result = VK_ERROR_OUT_OF_DEVICE_MEMORY;
+                        break;
+                    default:
+                        result = VK_ERROR_SURFACE_LOST_KHR;
+                        break;
+                }
+                break;
+            }
+            img.buffer = buffer;
+            img.dequeued = true;
+
+            image_native_buffer.handle = img.buffer->handle;
+            image_native_buffer.stride = img.buffer->stride;
+            image_native_buffer.format = img.buffer->format;
+            image_native_buffer.usage = int(img.buffer->usage);
+            android_convertGralloc0To1Usage(int(img.buffer->usage),
+                &image_native_buffer.usage2.producer,
+                &image_native_buffer.usage2.consumer);
+            image_native_buffer.usage3 = img.buffer->usage;
+            image_create.pNext = &image_native_buffer;
+
+            ATRACE_BEGIN("CreateImage");
+            result =
+                dispatch.CreateImage(device, &image_create, nullptr, &img.image);
+            ATRACE_END();
+            if (result != VK_SUCCESS) {
+                ALOGD("vkCreateImage w/ native buffer failed: %u", result);
+                break;
+            }
         }
-    }
 
-    // -- Cancel all buffers, returning them to the queue --
-    // If an error occurred before, also destroy the VkImage and release the
-    // buffer reference. Otherwise, we retain a strong reference to the buffer.
-    for (uint32_t i = 0; i < num_images; i++) {
-        Swapchain::Image& img = swapchain->images[i];
-        if (img.dequeued) {
-            if (!swapchain->shared) {
-                window->cancelBuffer(window, img.buffer.get(),
-                                     img.dequeue_fence);
-                img.dequeue_fence = -1;
-                img.dequeued = false;
+        // -- Cancel all buffers, returning them to the queue --
+        // If an error occurred before, also destroy the VkImage and release the
+        // buffer reference. Otherwise, we retain a strong reference to the buffer.
+        for (uint32_t i = 0; i < num_images; i++) {
+            Swapchain::Image& img = swapchain->images[i];
+            if (img.dequeued) {
+                if (!swapchain->shared) {
+                    window->cancelBuffer(window, img.buffer.get(),
+                                         img.dequeue_fence);
+                    img.dequeue_fence = -1;
+                    img.dequeued = false;
+                }
             }
         }
     }
@@ -1627,6 +1759,10 @@
             android::GpuStatsInfo::Stats::FALSE_PREROTATION);
     }
 
+    // Set stats for creating a Vulkan swapchain
+    android::GraphicsEnv::getInstance().setTargetStats(
+        android::GpuStatsInfo::Stats::CREATED_VULKAN_SWAPCHAIN);
+
     surface.swapchain_handle = HandleFromSwapchain(swapchain);
     *swapchain_handle = surface.swapchain_handle;
     return VK_SUCCESS;
@@ -1729,6 +1865,64 @@
             break;
         }
     }
+
+    // If this is a deferred alloc swapchain, this may be the first time we've
+    // seen a particular buffer. If so, there should be an empty slot. Find it,
+    // and bind the gralloc buffer to the VkImage for that slot. If there is no
+    // empty slot, then we dequeued an unexpected buffer. Non-deferred swapchains
+    // will also take this path, but will never have an empty slot since we
+    // populated them all upfront.
+    if (idx == swapchain.num_images) {
+        for (idx = 0; idx < swapchain.num_images; idx++) {
+            if (!swapchain.images[idx].buffer) {
+                // Note: this structure is technically required for
+                // Vulkan correctness, even though the driver is probably going
+                // to use everything from the VkNativeBufferANDROID below.
+                // This is kindof silly, but it's how we did the ANB
+                // side of VK_KHR_swapchain v69, so we're stuck with it unless
+                // we want to go tinkering with the ANB spec some more.
+                VkBindImageMemorySwapchainInfoKHR bimsi = {
+                    .sType = VK_STRUCTURE_TYPE_BIND_IMAGE_MEMORY_SWAPCHAIN_INFO_KHR,
+                    .pNext = nullptr,
+                    .swapchain = swapchain_handle,
+                    .imageIndex = idx,
+                };
+                VkNativeBufferANDROID nb = {
+                    .sType = VK_STRUCTURE_TYPE_NATIVE_BUFFER_ANDROID,
+                    .pNext = &bimsi,
+                    .handle = buffer->handle,
+                    .stride = buffer->stride,
+                    .format = buffer->format,
+                    .usage = int(buffer->usage),
+                };
+                VkBindImageMemoryInfo bimi = {
+                    .sType = VK_STRUCTURE_TYPE_BIND_IMAGE_MEMORY_INFO,
+                    .pNext = &nb,
+                    .image = swapchain.images[idx].image,
+                    .memory = VK_NULL_HANDLE,
+                    .memoryOffset = 0,
+                };
+                result = GetData(device).driver.BindImageMemory2(device, 1, &bimi);
+                if (result != VK_SUCCESS) {
+                    // This shouldn't really happen. If it does, something is probably
+                    // unrecoverably wrong with the swapchain and its images. Cancel
+                    // the buffer and declare the swapchain broken.
+                    ALOGE("failed to do deferred gralloc buffer bind");
+                    window->cancelBuffer(window, buffer, fence_fd);
+                    return VK_ERROR_OUT_OF_DATE_KHR;
+                }
+
+                swapchain.images[idx].dequeued = true;
+                swapchain.images[idx].dequeue_fence = fence_fd;
+                swapchain.images[idx].buffer = buffer;
+                break;
+            }
+        }
+    }
+
+    // The buffer doesn't match any slot. This shouldn't normally happen, but is
+    // possible if the bufferqueue is reconfigured behind libvulkan's back. If this
+    // happens, just declare the swapchain to be broken and the app will recreate it.
     if (idx == swapchain.num_images) {
         ALOGE("dequeueBuffer returned unrecognized buffer");
         window->cancelBuffer(window, buffer, fence_fd);
@@ -1796,6 +1990,214 @@
     return a != VK_SUCCESS ? a : b;
 }
 
+// KHR_incremental_present aspect of QueuePresentKHR
+static void SetSwapchainSurfaceDamage(ANativeWindow *window, const VkPresentRegionKHR *pRegion) {
+    std::vector<android_native_rect_t> rects(pRegion->rectangleCount);
+    for (auto i = 0u; i < pRegion->rectangleCount; i++) {
+        auto const& rect = pRegion->pRectangles[i];
+        if (rect.layer > 0) {
+            ALOGV("vkQueuePresentKHR ignoring invalid layer (%u); using layer 0 instead",
+                rect.layer);
+        }
+
+        rects[i].left = rect.offset.x;
+        rects[i].bottom = rect.offset.y;
+        rects[i].right = rect.offset.x + rect.extent.width;
+        rects[i].top = rect.offset.y + rect.extent.height;
+    }
+    native_window_set_surface_damage(window, rects.data(), rects.size());
+}
+
+// GOOGLE_display_timing aspect of QueuePresentKHR
+static void SetSwapchainFrameTimestamp(Swapchain &swapchain, const VkPresentTimeGOOGLE *pTime) {
+    ANativeWindow *window = swapchain.surface.window.get();
+
+    // We don't know whether the app will actually use GOOGLE_display_timing
+    // with a particular swapchain until QueuePresent; enable it on the BQ
+    // now if needed
+    if (!swapchain.frame_timestamps_enabled) {
+        ALOGV("Calling native_window_enable_frame_timestamps(true)");
+        native_window_enable_frame_timestamps(window, true);
+        swapchain.frame_timestamps_enabled = true;
+    }
+
+    // Record the nativeFrameId so it can be later correlated to
+    // this present.
+    uint64_t nativeFrameId = 0;
+    int err = native_window_get_next_frame_id(
+            window, &nativeFrameId);
+    if (err != android::OK) {
+        ALOGE("Failed to get next native frame ID.");
+    }
+
+    // Add a new timing record with the user's presentID and
+    // the nativeFrameId.
+    swapchain.timing.emplace_back(pTime, nativeFrameId);
+    if (swapchain.timing.size() > MAX_TIMING_INFOS) {
+        swapchain.timing.erase(
+            swapchain.timing.begin(),
+            swapchain.timing.begin() + swapchain.timing.size() - MAX_TIMING_INFOS);
+    }
+    if (pTime->desiredPresentTime) {
+        ALOGV(
+            "Calling native_window_set_buffers_timestamp(%" PRId64 ")",
+            pTime->desiredPresentTime);
+        native_window_set_buffers_timestamp(
+            window,
+            static_cast<int64_t>(pTime->desiredPresentTime));
+    }
+}
+
+// EXT_swapchain_maintenance1 present mode change
+static bool SetSwapchainPresentMode(ANativeWindow *window, VkPresentModeKHR mode) {
+    // There is no dynamic switching between non-shared present modes.
+    // All we support is switching between demand and continuous refresh.
+    if (!IsSharedPresentMode(mode))
+        return true;
+
+    int err = native_window_set_auto_refresh(window,
+            mode == VK_PRESENT_MODE_SHARED_CONTINUOUS_REFRESH_KHR);
+    if (err != android::OK) {
+        ALOGE("native_window_set_auto_refresh() failed: %s (%d)",
+              strerror(-err), err);
+        return false;
+    }
+
+    return true;
+}
+
+static VkResult PresentOneSwapchain(
+        VkQueue queue,
+        Swapchain& swapchain,
+        uint32_t imageIndex,
+        const VkPresentRegionKHR *pRegion,
+        const VkPresentTimeGOOGLE *pTime,
+        VkFence presentFence,
+        const VkPresentModeKHR *pPresentMode,
+        uint32_t waitSemaphoreCount,
+        const VkSemaphore *pWaitSemaphores) {
+
+    VkDevice device = GetData(queue).driver_device;
+    const auto& dispatch = GetData(queue).driver;
+
+    Swapchain::Image& img = swapchain.images[imageIndex];
+    VkResult swapchain_result = VK_SUCCESS;
+    VkResult result;
+    int err;
+
+    // XXX: long standing issue: QueueSignalReleaseImageANDROID consumes the
+    // wait semaphores, so this doesn't actually work for the multiple swapchain
+    // case.
+    int fence = -1;
+    result = dispatch.QueueSignalReleaseImageANDROID(
+        queue, waitSemaphoreCount,
+        pWaitSemaphores, img.image, &fence);
+    if (result != VK_SUCCESS) {
+        ALOGE("QueueSignalReleaseImageANDROID failed: %d", result);
+        swapchain_result = result;
+    }
+    if (img.release_fence >= 0)
+        close(img.release_fence);
+    img.release_fence = fence < 0 ? -1 : dup(fence);
+
+    if (swapchain.surface.swapchain_handle == HandleFromSwapchain(&swapchain)) {
+        ANativeWindow* window = swapchain.surface.window.get();
+        if (swapchain_result == VK_SUCCESS) {
+
+            if (presentFence != VK_NULL_HANDLE) {
+                int fence_copy = fence < 0 ? -1 : dup(fence);
+                VkImportFenceFdInfoKHR iffi = {
+                    VK_STRUCTURE_TYPE_IMPORT_FENCE_FD_INFO_KHR,
+                    nullptr,
+                    presentFence,
+                    VK_FENCE_IMPORT_TEMPORARY_BIT,
+                    VK_EXTERNAL_FENCE_HANDLE_TYPE_SYNC_FD_BIT,
+                    fence_copy,
+                };
+                if (VK_SUCCESS != dispatch.ImportFenceFdKHR(device, &iffi) && fence_copy >= 0) {
+                    // ImportFenceFdKHR takes ownership only if it succeeds
+                    close(fence_copy);
+                }
+            }
+
+            if (pRegion) {
+                SetSwapchainSurfaceDamage(window, pRegion);
+            }
+            if (pTime) {
+                SetSwapchainFrameTimestamp(swapchain, pTime);
+            }
+            if (pPresentMode) {
+                if (!SetSwapchainPresentMode(window, *pPresentMode))
+                    swapchain_result = WorstPresentResult(swapchain_result,
+                        VK_ERROR_SURFACE_LOST_KHR);
+            }
+
+            err = window->queueBuffer(window, img.buffer.get(), fence);
+            // queueBuffer always closes fence, even on error
+            if (err != android::OK) {
+                ALOGE("queueBuffer failed: %s (%d)", strerror(-err), err);
+                swapchain_result = WorstPresentResult(
+                    swapchain_result, VK_ERROR_SURFACE_LOST_KHR);
+            } else {
+                if (img.dequeue_fence >= 0) {
+                    close(img.dequeue_fence);
+                    img.dequeue_fence = -1;
+                }
+                img.dequeued = false;
+            }
+
+            // If the swapchain is in shared mode, immediately dequeue the
+            // buffer so it can be presented again without an intervening
+            // call to AcquireNextImageKHR. We expect to get the same buffer
+            // back from every call to dequeueBuffer in this mode.
+            if (swapchain.shared && swapchain_result == VK_SUCCESS) {
+                ANativeWindowBuffer* buffer;
+                int fence_fd;
+                err = window->dequeueBuffer(window, &buffer, &fence_fd);
+                if (err != android::OK) {
+                    ALOGE("dequeueBuffer failed: %s (%d)", strerror(-err), err);
+                    swapchain_result = WorstPresentResult(swapchain_result,
+                        VK_ERROR_SURFACE_LOST_KHR);
+                } else if (img.buffer != buffer) {
+                    ALOGE("got wrong image back for shared swapchain");
+                    swapchain_result = WorstPresentResult(swapchain_result,
+                        VK_ERROR_SURFACE_LOST_KHR);
+                } else {
+                    img.dequeue_fence = fence_fd;
+                    img.dequeued = true;
+                }
+            }
+        }
+        if (swapchain_result != VK_SUCCESS) {
+            OrphanSwapchain(device, &swapchain);
+        }
+        // Android will only return VK_SUBOPTIMAL_KHR for vkQueuePresentKHR,
+        // and only when the window's transform/rotation changes.  Extent
+        // changes will not cause VK_SUBOPTIMAL_KHR because of the
+        // application issues that were caused when the following transform
+        // change was added.
+        int window_transform_hint;
+        err = window->query(window, NATIVE_WINDOW_TRANSFORM_HINT,
+                            &window_transform_hint);
+        if (err != android::OK) {
+            ALOGE("NATIVE_WINDOW_TRANSFORM_HINT query failed: %s (%d)",
+                  strerror(-err), err);
+            swapchain_result = WorstPresentResult(
+                swapchain_result, VK_ERROR_SURFACE_LOST_KHR);
+        }
+        if (swapchain.pre_transform != window_transform_hint) {
+            swapchain_result =
+                WorstPresentResult(swapchain_result, VK_SUBOPTIMAL_KHR);
+        }
+    } else {
+        ReleaseSwapchainImage(device, swapchain.shared, nullptr, fence,
+                              img, true);
+        swapchain_result = VK_ERROR_OUT_OF_DATE_KHR;
+    }
+
+    return swapchain_result;
+}
+
 VKAPI_ATTR
 VkResult QueuePresentKHR(VkQueue queue, const VkPresentInfoKHR* present_info) {
     ATRACE_CALL();
@@ -1804,13 +2206,14 @@
              "vkQueuePresentKHR: invalid VkPresentInfoKHR structure type %d",
              present_info->sType);
 
-    VkDevice device = GetData(queue).driver_device;
-    const auto& dispatch = GetData(queue).driver;
     VkResult final_result = VK_SUCCESS;
 
     // Look at the pNext chain for supported extension structs:
     const VkPresentRegionsKHR* present_regions = nullptr;
     const VkPresentTimesInfoGOOGLE* present_times = nullptr;
+    const VkSwapchainPresentFenceInfoEXT* present_fences = nullptr;
+    const VkSwapchainPresentModeInfoEXT* present_modes = nullptr;
+
     const VkPresentRegionsKHR* next =
         reinterpret_cast<const VkPresentRegionsKHR*>(present_info->pNext);
     while (next) {
@@ -1822,6 +2225,14 @@
                 present_times =
                     reinterpret_cast<const VkPresentTimesInfoGOOGLE*>(next);
                 break;
+            case VK_STRUCTURE_TYPE_SWAPCHAIN_PRESENT_FENCE_INFO_EXT:
+                present_fences =
+                    reinterpret_cast<const VkSwapchainPresentFenceInfoEXT*>(next);
+                break;
+            case VK_STRUCTURE_TYPE_SWAPCHAIN_PRESENT_MODE_INFO_EXT:
+                present_modes =
+                    reinterpret_cast<const VkSwapchainPresentModeInfoEXT*>(next);
+                break;
             default:
                 ALOGV("QueuePresentKHR ignoring unrecognized pNext->sType = %x",
                       next->sType);
@@ -1837,179 +2248,34 @@
                  present_times->swapchainCount != present_info->swapchainCount,
              "VkPresentTimesInfoGOOGLE::swapchainCount != "
              "VkPresentInfo::swapchainCount");
+    ALOGV_IF(present_fences &&
+             present_fences->swapchainCount != present_info->swapchainCount,
+             "VkSwapchainPresentFenceInfoEXT::swapchainCount != "
+             "VkPresentInfo::swapchainCount");
+    ALOGV_IF(present_modes &&
+             present_modes->swapchainCount != present_info->swapchainCount,
+             "VkSwapchainPresentModeInfoEXT::swapchainCount != "
+             "VkPresentInfo::swapchainCount");
+
     const VkPresentRegionKHR* regions =
         (present_regions) ? present_regions->pRegions : nullptr;
     const VkPresentTimeGOOGLE* times =
         (present_times) ? present_times->pTimes : nullptr;
-    const VkAllocationCallbacks* allocator = &GetData(device).allocator;
-    android_native_rect_t* rects = nullptr;
-    uint32_t nrects = 0;
 
     for (uint32_t sc = 0; sc < present_info->swapchainCount; sc++) {
         Swapchain& swapchain =
             *SwapchainFromHandle(present_info->pSwapchains[sc]);
-        uint32_t image_idx = present_info->pImageIndices[sc];
-        Swapchain::Image& img = swapchain.images[image_idx];
-        const VkPresentRegionKHR* region =
-            (regions && !swapchain.mailbox_mode) ? &regions[sc] : nullptr;
-        const VkPresentTimeGOOGLE* time = (times) ? &times[sc] : nullptr;
-        VkResult swapchain_result = VK_SUCCESS;
-        VkResult result;
-        int err;
 
-        int fence = -1;
-        result = dispatch.QueueSignalReleaseImageANDROID(
-            queue, present_info->waitSemaphoreCount,
-            present_info->pWaitSemaphores, img.image, &fence);
-        if (result != VK_SUCCESS) {
-            ALOGE("QueueSignalReleaseImageANDROID failed: %d", result);
-            swapchain_result = result;
-        }
-        if (img.release_fence >= 0)
-            close(img.release_fence);
-        img.release_fence = fence < 0 ? -1 : dup(fence);
-
-        if (swapchain.surface.swapchain_handle ==
-            present_info->pSwapchains[sc]) {
-            ANativeWindow* window = swapchain.surface.window.get();
-            if (swapchain_result == VK_SUCCESS) {
-                if (region) {
-                    // Process the incremental-present hint for this swapchain:
-                    uint32_t rcount = region->rectangleCount;
-                    if (rcount > nrects) {
-                        android_native_rect_t* new_rects =
-                            static_cast<android_native_rect_t*>(
-                                allocator->pfnReallocation(
-                                    allocator->pUserData, rects,
-                                    sizeof(android_native_rect_t) * rcount,
-                                    alignof(android_native_rect_t),
-                                    VK_SYSTEM_ALLOCATION_SCOPE_COMMAND));
-                        if (new_rects) {
-                            rects = new_rects;
-                            nrects = rcount;
-                        } else {
-                            rcount = 0;  // Ignore the hint for this swapchain
-                        }
-                    }
-                    for (uint32_t r = 0; r < rcount; ++r) {
-                        if (region->pRectangles[r].layer > 0) {
-                            ALOGV(
-                                "vkQueuePresentKHR ignoring invalid layer "
-                                "(%u); using layer 0 instead",
-                                region->pRectangles[r].layer);
-                        }
-                        int x = region->pRectangles[r].offset.x;
-                        int y = region->pRectangles[r].offset.y;
-                        int width = static_cast<int>(
-                            region->pRectangles[r].extent.width);
-                        int height = static_cast<int>(
-                            region->pRectangles[r].extent.height);
-                        android_native_rect_t* cur_rect = &rects[r];
-                        cur_rect->left = x;
-                        cur_rect->top = y + height;
-                        cur_rect->right = x + width;
-                        cur_rect->bottom = y;
-                    }
-                    native_window_set_surface_damage(window, rects, rcount);
-                }
-                if (time) {
-                    if (!swapchain.frame_timestamps_enabled) {
-                        ALOGV(
-                            "Calling "
-                            "native_window_enable_frame_timestamps(true)");
-                        native_window_enable_frame_timestamps(window, true);
-                        swapchain.frame_timestamps_enabled = true;
-                    }
-
-                    // Record the nativeFrameId so it can be later correlated to
-                    // this present.
-                    uint64_t nativeFrameId = 0;
-                    err = native_window_get_next_frame_id(
-                            window, &nativeFrameId);
-                    if (err != android::OK) {
-                        ALOGE("Failed to get next native frame ID.");
-                    }
-
-                    // Add a new timing record with the user's presentID and
-                    // the nativeFrameId.
-                    swapchain.timing.emplace_back(time, nativeFrameId);
-                    while (swapchain.timing.size() > MAX_TIMING_INFOS) {
-                        swapchain.timing.erase(swapchain.timing.begin());
-                    }
-                    if (time->desiredPresentTime) {
-                        // Set the desiredPresentTime:
-                        ALOGV(
-                            "Calling "
-                            "native_window_set_buffers_timestamp(%" PRId64 ")",
-                            time->desiredPresentTime);
-                        native_window_set_buffers_timestamp(
-                            window,
-                            static_cast<int64_t>(time->desiredPresentTime));
-                    }
-                }
-
-                err = window->queueBuffer(window, img.buffer.get(), fence);
-                // queueBuffer always closes fence, even on error
-                if (err != android::OK) {
-                    ALOGE("queueBuffer failed: %s (%d)", strerror(-err), err);
-                    swapchain_result = WorstPresentResult(
-                        swapchain_result, VK_ERROR_SURFACE_LOST_KHR);
-                } else {
-                    if (img.dequeue_fence >= 0) {
-                        close(img.dequeue_fence);
-                        img.dequeue_fence = -1;
-                    }
-                    img.dequeued = false;
-                }
-
-                // If the swapchain is in shared mode, immediately dequeue the
-                // buffer so it can be presented again without an intervening
-                // call to AcquireNextImageKHR. We expect to get the same buffer
-                // back from every call to dequeueBuffer in this mode.
-                if (swapchain.shared && swapchain_result == VK_SUCCESS) {
-                    ANativeWindowBuffer* buffer;
-                    int fence_fd;
-                    err = window->dequeueBuffer(window, &buffer, &fence_fd);
-                    if (err != android::OK) {
-                        ALOGE("dequeueBuffer failed: %s (%d)", strerror(-err), err);
-                        swapchain_result = WorstPresentResult(swapchain_result,
-                            VK_ERROR_SURFACE_LOST_KHR);
-                    } else if (img.buffer != buffer) {
-                        ALOGE("got wrong image back for shared swapchain");
-                        swapchain_result = WorstPresentResult(swapchain_result,
-                            VK_ERROR_SURFACE_LOST_KHR);
-                    } else {
-                        img.dequeue_fence = fence_fd;
-                        img.dequeued = true;
-                    }
-                }
-            }
-            if (swapchain_result != VK_SUCCESS) {
-                OrphanSwapchain(device, &swapchain);
-            }
-            // Android will only return VK_SUBOPTIMAL_KHR for vkQueuePresentKHR,
-            // and only when the window's transform/rotation changes.  Extent
-            // changes will not cause VK_SUBOPTIMAL_KHR because of the
-            // application issues that were caused when the following transform
-            // change was added.
-            int window_transform_hint;
-            err = window->query(window, NATIVE_WINDOW_TRANSFORM_HINT,
-                                &window_transform_hint);
-            if (err != android::OK) {
-                ALOGE("NATIVE_WINDOW_TRANSFORM_HINT query failed: %s (%d)",
-                      strerror(-err), err);
-                swapchain_result = WorstPresentResult(
-                    swapchain_result, VK_ERROR_SURFACE_LOST_KHR);
-            }
-            if (swapchain.pre_transform != window_transform_hint) {
-                swapchain_result =
-                    WorstPresentResult(swapchain_result, VK_SUBOPTIMAL_KHR);
-            }
-        } else {
-            ReleaseSwapchainImage(device, swapchain.shared, nullptr, fence,
-                                  img, true);
-            swapchain_result = VK_ERROR_OUT_OF_DATE_KHR;
-        }
+        VkResult swapchain_result = PresentOneSwapchain(
+            queue,
+            swapchain,
+            present_info->pImageIndices[sc],
+            (regions && !swapchain.mailbox_mode) ? &regions[sc] : nullptr,
+            times ? &times[sc] : nullptr,
+            present_fences ? present_fences->pFences[sc] : VK_NULL_HANDLE,
+            present_modes ? &present_modes->pPresentModes[sc] : nullptr,
+            present_info->waitSemaphoreCount,
+            present_info->pWaitSemaphores);
 
         if (present_info->pResults)
             present_info->pResults[sc] = swapchain_result;
@@ -2017,9 +2283,6 @@
         if (swapchain_result != final_result)
             final_result = WorstPresentResult(final_result, swapchain_result);
     }
-    if (rects) {
-        allocator->pfnFree(allocator->pUserData, rects);
-    }
 
     return final_result;
 }
@@ -2235,5 +2498,35 @@
         out_bind_infos.empty() ? pBindInfos : out_bind_infos.data());
 }
 
+VKAPI_ATTR
+VkResult ReleaseSwapchainImagesEXT(VkDevice /*device*/,
+                                   const VkReleaseSwapchainImagesInfoEXT* pReleaseInfo) {
+    ATRACE_CALL();
+
+    Swapchain& swapchain = *SwapchainFromHandle(pReleaseInfo->swapchain);
+    ANativeWindow* window = swapchain.surface.window.get();
+
+    // If in shared present mode, don't actually release the image back to the BQ.
+    // Both sides share it forever.
+    if (swapchain.shared)
+        return VK_SUCCESS;
+
+    for (uint32_t i = 0; i < pReleaseInfo->imageIndexCount; i++) {
+        Swapchain::Image& img = swapchain.images[pReleaseInfo->pImageIndices[i]];
+        window->cancelBuffer(window, img.buffer.get(), img.dequeue_fence);
+
+        // cancelBuffer has taken ownership of the dequeue fence
+        img.dequeue_fence = -1;
+        // if we're still holding a release fence, get rid of it now
+        if (img.release_fence >= 0) {
+           close(img.release_fence);
+           img.release_fence = -1;
+        }
+        img.dequeued = false;
+    }
+
+    return VK_SUCCESS;
+}
+
 }  // namespace driver
 }  // namespace vulkan
diff --git a/vulkan/libvulkan/swapchain.h b/vulkan/libvulkan/swapchain.h
index 4912ef1..280fe9b 100644
--- a/vulkan/libvulkan/swapchain.h
+++ b/vulkan/libvulkan/swapchain.h
@@ -46,6 +46,7 @@
 VKAPI_ATTR VkResult GetPhysicalDeviceSurfaceFormats2KHR(VkPhysicalDevice physicalDevice, const VkPhysicalDeviceSurfaceInfo2KHR* pSurfaceInfo, uint32_t* pSurfaceFormatCount, VkSurfaceFormat2KHR* pSurfaceFormats);
 VKAPI_ATTR VkResult BindImageMemory2(VkDevice device, uint32_t bindInfoCount, const VkBindImageMemoryInfo* pBindInfos);
 VKAPI_ATTR VkResult BindImageMemory2KHR(VkDevice device, uint32_t bindInfoCount, const VkBindImageMemoryInfo* pBindInfos);
+VKAPI_ATTR VkResult ReleaseSwapchainImagesEXT(VkDevice device, const VkReleaseSwapchainImagesInfoEXT* pReleaseInfo);
 // clang-format on
 
 }  // namespace driver
diff --git a/vulkan/scripts/driver_generator.py b/vulkan/scripts/driver_generator.py
index af56764..78b550c 100644
--- a/vulkan/scripts/driver_generator.py
+++ b/vulkan/scripts/driver_generator.py
@@ -35,6 +35,8 @@
     'VK_KHR_surface',
     'VK_KHR_surface_protected_capabilities',
     'VK_KHR_swapchain',
+    'VK_EXT_swapchain_maintenance1',
+    'VK_EXT_surface_maintenance1',
 ]
 
 # Extensions known to vulkan::driver level.
@@ -46,6 +48,7 @@
     'VK_KHR_external_memory_capabilities',
     'VK_KHR_external_semaphore_capabilities',
     'VK_KHR_external_fence_capabilities',
+    'VK_KHR_external_fence_fd',
 ]
 
 # Functions needed at vulkan::driver level.
@@ -112,6 +115,9 @@
     # For promoted VK_KHR_external_fence_capabilities
     'vkGetPhysicalDeviceExternalFenceProperties',
     'vkGetPhysicalDeviceExternalFencePropertiesKHR',
+
+    # VK_KHR_swapchain_maintenance1 requirement
+    'vkImportFenceFdKHR',
 ]
 
 # Functions intercepted at vulkan::driver level.
diff --git a/vulkan/vkjson/vkjson.cc b/vulkan/vkjson/vkjson.cc
index da6b00a..0284192 100644
--- a/vulkan/vkjson/vkjson.cc
+++ b/vulkan/vkjson/vkjson.cc
@@ -731,7 +731,7 @@
     visitor->Visit("vulkanMemoryModelAvailabilityVisibilityChains", &features->vulkanMemoryModelAvailabilityVisibilityChains) &&
     visitor->Visit("shaderOutputViewportIndex", &features->shaderOutputViewportIndex) &&
     visitor->Visit("shaderOutputLayer", &features->shaderOutputLayer) &&
-    visitor->Visit("shaderOutputLayer", &features->shaderOutputLayer);
+    visitor->Visit("subgroupBroadcastDynamicId", &features->subgroupBroadcastDynamicId);
 }
 
 template <typename Visitor>