diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 8637a31..28fdaa4 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -237,6 +237,7 @@
         { OPT,      "events/kmem/rss_stat/enable" },
         { OPT,      "events/kmem/ion_heap_grow/enable" },
         { OPT,      "events/kmem/ion_heap_shrink/enable" },
+        { OPT,      "events/ion/ion_stat/enable" },
     } },
 };
 
diff --git a/cmds/atrace/atrace.rc b/cmds/atrace/atrace.rc
index 040ddde..9b2f4a8 100644
--- a/cmds/atrace/atrace.rc
+++ b/cmds/atrace/atrace.rc
@@ -107,6 +107,8 @@
     chmod 0666 /sys/kernel/tracing/events/kmem/ion_heap_grow/enable
     chmod 0666 /sys/kernel/debug/tracing/events/kmem/ion_heap_shrink/enable
     chmod 0666 /sys/kernel/tracing/events/kmem/ion_heap_shrink/enable
+    chmod 0666 /sys/kernel/debug/tracing/events/ion/ion_stat/enable
+    chmod 0666 /sys/kernel/tracing/events/ion/ion_stat/enable
     chmod 0666 /sys/kernel/debug/tracing/events/mm_event/mm_event_record/enable
     chmod 0666 /sys/kernel/tracing/events/mm_event/mm_event_record/enable
     chmod 0666 /sys/kernel/debug/tracing/events/signal/signal_generate/enable
diff --git a/cmds/dumpstate/binder/android/os/IDumpstateListener.aidl b/cmds/dumpstate/binder/android/os/IDumpstateListener.aidl
index 8ff4ca6..a5e6c68 100644
--- a/cmds/dumpstate/binder/android/os/IDumpstateListener.aidl
+++ b/cmds/dumpstate/binder/android/os/IDumpstateListener.aidl
@@ -68,4 +68,9 @@
      * Called when screenshot is taken.
      */
     oneway void onScreenshotTaken(boolean success);
+
+    /**
+     * Called when ui intensive bugreport dumps are finished.
+     */
+    oneway void onUiIntensiveBugreportDumpsFinished(String callingPackage);
 }
diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index c85c7cf..9ba4819 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -169,6 +169,7 @@
 #define OTA_METADATA_DIR "/metadata/ota"
 #define SNAPSHOTCTL_LOG_DIR "/data/misc/snapshotctl_log"
 #define LINKERCONFIG_DIR "/linkerconfig"
+#define PACKAGE_DEX_USE_LIST "/data/system/package-dex-usage.list"
 
 // TODO(narayan): Since this information has to be kept in sync
 // with tombstoned, we should just put it in a common header.
@@ -1612,6 +1613,7 @@
     if (!PropertiesHelper::IsUserBuild()) {
         ds.AddDir(PROFILE_DATA_DIR_CUR, true);
         ds.AddDir(PROFILE_DATA_DIR_REF, true);
+        ds.AddZipEntry(ZIP_ROOT_DIR + PACKAGE_DEX_USE_LIST, PACKAGE_DEX_USE_LIST);
     }
     ds.AddDir(PREREBOOT_DATA_DIR, false);
     add_mountinfo();
@@ -2630,11 +2632,13 @@
 
     if (options_->telephony_only) {
         MaybeTakeEarlyScreenshot();
+        onUiIntensiveBugreportDumpsFinished(calling_uid, calling_package);
         MaybeCheckUserConsent(calling_uid, calling_package);
         DumpstateTelephonyOnly(calling_package);
         DumpstateBoard();
     } else if (options_->wifi_only) {
         MaybeTakeEarlyScreenshot();
+        onUiIntensiveBugreportDumpsFinished(calling_uid, calling_package);
         MaybeCheckUserConsent(calling_uid, calling_package);
         DumpstateWifiOnly();
     } else {
@@ -2643,6 +2647,7 @@
 
         // Take screenshot and get consent only after critical dumpsys has finished.
         MaybeTakeEarlyScreenshot();
+        onUiIntensiveBugreportDumpsFinished(calling_uid, calling_package);
         MaybeCheckUserConsent(calling_uid, calling_package);
 
         // Dump state for the default case. This also drops root.
@@ -2732,6 +2737,19 @@
     TakeScreenshot();
 }
 
+void Dumpstate::onUiIntensiveBugreportDumpsFinished(int32_t calling_uid,
+                                                    const std::string& calling_package) {
+    if (calling_uid == AID_SHELL || !CalledByApi()) {
+        return;
+    }
+    if (listener_ != nullptr) {
+        // Let listener know ui intensive bugreport dumps are finished, then it can do event
+        // handling if required.
+        android::String16 package(calling_package.c_str());
+        listener_->onUiIntensiveBugreportDumpsFinished(package);
+    }
+}
+
 void Dumpstate::MaybeCheckUserConsent(int32_t calling_uid, const std::string& calling_package) {
     if (calling_uid == AID_SHELL || !CalledByApi()) {
         // No need to get consent for shell triggered dumpstates, or not through
diff --git a/cmds/dumpstate/dumpstate.h b/cmds/dumpstate/dumpstate.h
index 498f338..28d8936 100644
--- a/cmds/dumpstate/dumpstate.h
+++ b/cmds/dumpstate/dumpstate.h
@@ -509,6 +509,9 @@
 
     void MaybeTakeEarlyScreenshot();
 
+    void onUiIntensiveBugreportDumpsFinished(int32_t calling_uid,
+                                             const std::string& calling_package);
+
     void MaybeCheckUserConsent(int32_t calling_uid, const std::string& calling_package);
 
     // Removes the in progress files output files (tmp file, zip/txt file, screenshot),
diff --git a/cmds/dumpstate/tests/dumpstate_smoke_test.cpp b/cmds/dumpstate/tests/dumpstate_smoke_test.cpp
index 047a1c3..6f2d754 100644
--- a/cmds/dumpstate/tests/dumpstate_smoke_test.cpp
+++ b/cmds/dumpstate/tests/dumpstate_smoke_test.cpp
@@ -173,6 +173,15 @@
         return binder::Status::ok();
     }
 
+    binder::Status onUiIntensiveBugreportDumpsFinished(const android::String16& callingpackage)
+        override {
+        std::lock_guard <std::mutex> lock(lock_);
+        std::string callingpackageUtf8 = std::string(String8(callingpackage).string());
+        dprintf(out_fd_, "\rCalling package of ui intensive bugreport dumps finished: %s",
+                callingpackageUtf8.c_str());
+        return binder::Status::ok();
+    }
+
     bool getIsFinished() {
         std::lock_guard<std::mutex> lock(lock_);
         return is_finished_;
diff --git a/cmds/dumpstate/tests/dumpstate_test.cpp b/cmds/dumpstate/tests/dumpstate_test.cpp
index 2efb130..9871a3b 100644
--- a/cmds/dumpstate/tests/dumpstate_test.cpp
+++ b/cmds/dumpstate/tests/dumpstate_test.cpp
@@ -66,6 +66,8 @@
     MOCK_METHOD1(onError, binder::Status(int32_t error_code));
     MOCK_METHOD0(onFinished, binder::Status());
     MOCK_METHOD1(onScreenshotTaken, binder::Status(bool success));
+    MOCK_METHOD1(onUiIntensiveBugreportDumpsFinished,
+        binder::Status(const android::String16& callingpackage));
 
   protected:
     MOCK_METHOD0(onAsBinder, IBinder*());
diff --git a/cmds/installd/InstalldNativeService.cpp b/cmds/installd/InstalldNativeService.cpp
index ae44d38..7d1c1ad 100644
--- a/cmds/installd/InstalldNativeService.cpp
+++ b/cmds/installd/InstalldNativeService.cpp
@@ -420,6 +420,32 @@
     return true;
 }
 
+binder::Status InstalldNativeService::createAppDataBatched(
+        const std::unique_ptr<std::vector<std::unique_ptr<std::string>>>& uuids,
+        const std::unique_ptr<std::vector<std::unique_ptr<std::string>>>& packageNames,
+        int32_t userId, int32_t flags, const std::vector<int32_t>& appIds,
+        const std::vector<std::string>& seInfos, const std::vector<int32_t>& targetSdkVersions,
+        int64_t* _aidl_return) {
+    ENFORCE_UID(AID_SYSTEM);
+    std::lock_guard<std::recursive_mutex> lock(mLock);
+
+    ATRACE_BEGIN("createAppDataBatched");
+    binder::Status ret;
+    for (size_t i = 0; i < uuids->size(); i++) {
+        if (!packageNames->at(i)) {
+            continue;
+        }
+        ret = createAppData(uuids->at(i), *packageNames->at(i), userId, flags, appIds[i],
+                seInfos[i], targetSdkVersions[i], _aidl_return);
+        if (!ret.isOk()) {
+            ATRACE_END();
+            return ret;
+        }
+    }
+    ATRACE_END();
+    return ok();
+}
+
 binder::Status InstalldNativeService::createAppData(const std::unique_ptr<std::string>& uuid,
         const std::string& packageName, int32_t userId, int32_t flags, int32_t appId,
         const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return) {
diff --git a/cmds/installd/InstalldNativeService.h b/cmds/installd/InstalldNativeService.h
index eb151ca..8e7d98b 100644
--- a/cmds/installd/InstalldNativeService.h
+++ b/cmds/installd/InstalldNativeService.h
@@ -44,7 +44,12 @@
             int32_t userSerial, int32_t flags);
     binder::Status destroyUserData(const std::unique_ptr<std::string>& uuid, int32_t userId,
             int32_t flags);
-
+    binder::Status createAppDataBatched(
+            const std::unique_ptr<std::vector<std::unique_ptr<std::string>>>& uuids,
+            const std::unique_ptr<std::vector<std::unique_ptr<std::string>>>& packageNames,
+            int32_t userId, int32_t flags, const std::vector<int32_t>& appIds,
+            const std::vector<std::string>& seInfos, const std::vector<int32_t>& targetSdkVersions,
+            int64_t* _aidl_return);
     binder::Status createAppData(const std::unique_ptr<std::string>& uuid,
             const std::string& packageName, int32_t userId, int32_t flags, int32_t appId,
             const std::string& seInfo, int32_t targetSdkVersion, int64_t* _aidl_return);
diff --git a/cmds/installd/binder/android/os/IInstalld.aidl b/cmds/installd/binder/android/os/IInstalld.aidl
index 5e5af73..eeda6c5 100644
--- a/cmds/installd/binder/android/os/IInstalld.aidl
+++ b/cmds/installd/binder/android/os/IInstalld.aidl
@@ -23,6 +23,9 @@
 
     long createAppData(@nullable @utf8InCpp String uuid, in @utf8InCpp String packageName,
             int userId, int flags, int appId, in @utf8InCpp String seInfo, int targetSdkVersion);
+    long createAppDataBatched(in @nullable @utf8InCpp String[] uuids,
+        in @nullable @utf8InCpp String[] packageNames, in int userId, int flags, in int[] appIds,
+        in @utf8InCpp String[] seInfos, in int[] targetSdkVersions);
     void restoreconAppData(@nullable @utf8InCpp String uuid, @utf8InCpp String packageName,
             int userId, int flags, int appId, @utf8InCpp String seInfo);
     void migrateAppData(@nullable @utf8InCpp String uuid, @utf8InCpp String packageName,
diff --git a/cmds/installd/dexopt.cpp b/cmds/installd/dexopt.cpp
index 5ee6a9f..ebca892 100644
--- a/cmds/installd/dexopt.cpp
+++ b/cmds/installd/dexopt.cpp
@@ -262,6 +262,17 @@
   return "";
 }
 
+static std::string MapPropertyToArgWithBackup(const std::string& property,
+                                              const std::string& backupProperty,
+                                              const std::string& format,
+                                              const std::string& default_value = "") {
+  std::string value = GetProperty(property, default_value);
+  if (!value.empty()) {
+    return StringPrintf(format.c_str(), value.c_str());
+  }
+  return MapPropertyToArg(backupProperty, format, default_value);
+}
+
 // Determines which binary we should use for execution (the debug or non-debug version).
 // e.g. dex2oatd vs dex2oat
 static const char* select_execution_binary(const char* binary, const char* debug_binary,
@@ -321,6 +332,7 @@
                const char* compiler_filter,
                bool debuggable,
                bool post_bootcomplete,
+               bool for_restore,
                bool background_job_compile,
                int profile_fd,
                const char* class_loader_context,
@@ -336,14 +348,24 @@
         std::string dex2oat_Xms_arg = MapPropertyToArg("dalvik.vm.dex2oat-Xms", "-Xms%s");
         std::string dex2oat_Xmx_arg = MapPropertyToArg("dalvik.vm.dex2oat-Xmx", "-Xmx%s");
 
-        const char* threads_property = post_bootcomplete
-                ? "dalvik.vm.dex2oat-threads"
-                : "dalvik.vm.boot-dex2oat-threads";
-        std::string dex2oat_threads_arg = MapPropertyToArg(threads_property, "-j%s");
-        const char* cpu_set_property = post_bootcomplete
-                ? "dalvik.vm.dex2oat-cpu-set"
-                : "dalvik.vm.boot-dex2oat-cpu-set";
-        std::string dex2oat_cpu_set_arg = MapPropertyToArg(cpu_set_property, "--cpu-set=%s");
+        std::string threads_format = "-j%s";
+        std::string dex2oat_threads_arg = post_bootcomplete
+                ? (for_restore
+                    ? MapPropertyToArgWithBackup(
+                            "dalvik.vm.restore-dex2oat-threads",
+                            "dalvik.vm.dex2oat-threads",
+                            threads_format)
+                    : MapPropertyToArg("dalvik.vm.dex2oat-threads", threads_format))
+                : MapPropertyToArg("dalvik.vm.boot-dex2oat-threads", threads_format);
+        std::string cpu_set_format = "--cpu-set=%s";
+        std::string dex2oat_cpu_set_arg = post_bootcomplete
+                ? (for_restore
+                    ? MapPropertyToArgWithBackup(
+                            "dalvik.vm.restore-dex2oat-cpu-set",
+                            "dalvik.vm.dex2oat-cpu-set",
+                            cpu_set_format)
+                    : MapPropertyToArg("dalvik.vm.dex2oat-cpu-set", cpu_set_format))
+                : MapPropertyToArg("dalvik.vm.boot-dex2oat-cpu-set", cpu_set_format);
 
         std::string bootclasspath;
         char* dex2oat_bootclasspath = getenv("DEX2OATBOOTCLASSPATH");
@@ -407,8 +429,17 @@
             MapPropertyToArg("dalvik.vm.dex2oat-very-large", "--very-large-app-threshold=%s");
 
 
+
+        // Decide whether to use dex2oat64.
+        bool use_dex2oat64 = false;
+        // Check whether the device even supports 64-bit ABIs.
+        if (!GetProperty("ro.product.cpu.abilist64", "").empty()) {
+          use_dex2oat64 = GetBoolProperty("dalvik.vm.dex2oat64.enabled", false);
+        }
         const char* dex2oat_bin = select_execution_binary(
-            kDex2oatPath, kDex2oatDebugPath, background_job_compile);
+            (use_dex2oat64 ? kDex2oat64Path : kDex2oat32Path),
+            (use_dex2oat64 ? kDex2oatDebug64Path : kDex2oatDebug32Path),
+            background_job_compile);
 
         bool generate_minidebug_info = kEnableMinidebugInfo &&
                 GetBoolProperty(kMinidebugInfoSystemProperty, kMinidebugInfoSystemPropertyDefault);
@@ -2075,6 +2106,7 @@
     bool enable_hidden_api_checks = (dexopt_flags & DEXOPT_ENABLE_HIDDEN_API_CHECKS) != 0;
     bool generate_compact_dex = (dexopt_flags & DEXOPT_GENERATE_COMPACT_DEX) != 0;
     bool generate_app_image = (dexopt_flags & DEXOPT_GENERATE_APP_IMAGE) != 0;
+    bool for_restore = (dexopt_flags & DEXOPT_FOR_RESTORE) != 0;
 
     // Check if we're dealing with a secondary dex file and if we need to compile it.
     std::string oat_dir_str;
@@ -2191,6 +2223,7 @@
                       compiler_filter,
                       debuggable,
                       boot_complete,
+                      for_restore,
                       background_job_compile,
                       reference_profile_fd.get(),
                       class_loader_context,
diff --git a/cmds/installd/dexopt.h b/cmds/installd/dexopt.h
index ef739ba..cc44873 100644
--- a/cmds/installd/dexopt.h
+++ b/cmds/installd/dexopt.h
@@ -34,8 +34,10 @@
 
 #define ANDROID_ART_APEX_BIN "/apex/com.android.art/bin"
 // Location of binaries in the Android Runtime APEX.
-static constexpr const char* kDex2oatPath = ANDROID_ART_APEX_BIN "/dex2oat";
-static constexpr const char* kDex2oatDebugPath = ANDROID_ART_APEX_BIN "/dex2oatd";
+static constexpr const char* kDex2oat32Path = ANDROID_ART_APEX_BIN "/dex2oat32";
+static constexpr const char* kDex2oat64Path = ANDROID_ART_APEX_BIN "/dex2oat64";
+static constexpr const char* kDex2oatDebug32Path = ANDROID_ART_APEX_BIN "/dex2oatd32";
+static constexpr const char* kDex2oatDebug64Path = ANDROID_ART_APEX_BIN "/dex2oatd64";
 static constexpr const char* kProfmanPath = ANDROID_ART_APEX_BIN "/profman";
 static constexpr const char* kProfmanDebugPath = ANDROID_ART_APEX_BIN "/profmand";
 static constexpr const char* kDexoptanalyzerPath = ANDROID_ART_APEX_BIN "/dexoptanalyzer";
diff --git a/cmds/installd/installd_constants.h b/cmds/installd/installd_constants.h
index c928631..b5ee481 100644
--- a/cmds/installd/installd_constants.h
+++ b/cmds/installd/installd_constants.h
@@ -55,6 +55,7 @@
 constexpr int DEXOPT_ENABLE_HIDDEN_API_CHECKS = 1 << 10;
 constexpr int DEXOPT_GENERATE_COMPACT_DEX = 1 << 11;
 constexpr int DEXOPT_GENERATE_APP_IMAGE = 1 << 12;
+constexpr int DEXOPT_FOR_RESTORE = 1 << 13; // TODO(b/135202722): remove
 
 /* all known values for dexopt flags */
 constexpr int DEXOPT_MASK =
@@ -69,7 +70,8 @@
     | DEXOPT_IDLE_BACKGROUND_JOB
     | DEXOPT_ENABLE_HIDDEN_API_CHECKS
     | DEXOPT_GENERATE_COMPACT_DEX
-    | DEXOPT_GENERATE_APP_IMAGE;
+    | DEXOPT_GENERATE_APP_IMAGE
+    | DEXOPT_FOR_RESTORE;
 
 // NOTE: keep in sync with StorageManager
 constexpr int FLAG_STORAGE_DE = 1 << 0;
diff --git a/cmds/installd/otapreopt.cpp b/cmds/installd/otapreopt.cpp
index d773790..18f8268 100644
--- a/cmds/installd/otapreopt.cpp
+++ b/cmds/installd/otapreopt.cpp
@@ -83,7 +83,7 @@
 static_assert(DEXOPT_GENERATE_COMPACT_DEX == 1 << 11, "DEXOPT_GENERATE_COMPACT_DEX unexpected");
 static_assert(DEXOPT_GENERATE_APP_IMAGE == 1 << 12, "DEXOPT_GENERATE_APP_IMAGE unexpected");
 
-static_assert(DEXOPT_MASK           == (0x1dfe | DEXOPT_IDLE_BACKGROUND_JOB),
+static_assert(DEXOPT_MASK           == (0x3dfe | DEXOPT_IDLE_BACKGROUND_JOB),
               "DEXOPT_MASK unexpected.");
 
 
diff --git a/cmds/installd/tests/installd_dexopt_test.cpp b/cmds/installd/tests/installd_dexopt_test.cpp
index 69fefa1..16e4055 100644
--- a/cmds/installd/tests/installd_dexopt_test.cpp
+++ b/cmds/installd/tests/installd_dexopt_test.cpp
@@ -653,6 +653,15 @@
                         DEX2OAT_FROM_SCRATCH);
 }
 
+TEST_F(DexoptTest, DexoptPrimaryPublicRestore) {
+    LOG(INFO) << "DexoptPrimaryPublicRestore";
+    CompilePrimaryDexOk("verify",
+                        DEXOPT_FOR_RESTORE | DEXOPT_BOOTCOMPLETE | DEXOPT_PUBLIC,
+                        app_oat_dir_.c_str(),
+                        kTestAppGid,
+                        DEX2OAT_FROM_SCRATCH);
+}
+
 TEST_F(DexoptTest, DexoptPrimaryFailedInvalidFilter) {
     LOG(INFO) << "DexoptPrimaryFailedInvalidFilter";
     binder::Status status;
@@ -750,6 +759,36 @@
     EXPECT_TRUE(found_enable);
 }
 
+TEST_F(DexoptTest, DexoptDex2oat64Enabled) {
+    LOG(INFO) << "DexoptDex2oat64Enabled";
+    const std::string property = "dalvik.vm.dex2oat64.enabled";
+    const std::string previous_value = android::base::GetProperty(property, "");
+    auto restore_property = android::base::make_scope_guard([=]() {
+        android::base::SetProperty(property, previous_value);
+    });
+    std::string odex = GetPrimaryDexArtifact(app_oat_dir_.c_str(), apk_path_, "odex");
+    // Disable the property and use dex2oat32.
+    ASSERT_TRUE(android::base::SetProperty(property, "false")) << property;
+    CompilePrimaryDexOk("speed-profile",
+                        DEXOPT_IDLE_BACKGROUND_JOB | DEXOPT_PROFILE_GUIDED |
+                                DEXOPT_GENERATE_APP_IMAGE,
+                        app_oat_dir_.c_str(),
+                        kTestAppGid,
+                        DEX2OAT_FROM_SCRATCH,
+                        /*binder_result=*/nullptr,
+                        empty_dm_file_.c_str());
+    // Enable the property and use dex2oat64.
+    ASSERT_TRUE(android::base::SetProperty(property, "true")) << property;
+    CompilePrimaryDexOk("speed-profile",
+                        DEXOPT_IDLE_BACKGROUND_JOB | DEXOPT_PROFILE_GUIDED |
+                                DEXOPT_GENERATE_APP_IMAGE,
+                        app_oat_dir_.c_str(),
+                        kTestAppGid,
+                        DEX2OAT_FROM_SCRATCH,
+                        /*binder_result=*/nullptr,
+                        empty_dm_file_.c_str());
+}
+
 class PrimaryDexReCompilationTest : public DexoptTest {
   public:
     virtual void SetUp() {
diff --git a/headers/media_plugin/media/openmax/OMX_IndexExt.h b/headers/media_plugin/media/openmax/OMX_IndexExt.h
index bbb3193..a427db7 100644
--- a/headers/media_plugin/media/openmax/OMX_IndexExt.h
+++ b/headers/media_plugin/media/openmax/OMX_IndexExt.h
@@ -89,6 +89,7 @@
     OMX_IndexParamVideoVp9,                         /**< reference: OMX_VIDEO_PARAM_VP9TYPE */
     OMX_IndexParamVideoAndroidVp9Encoder,           /**< reference: OMX_VIDEO_PARAM_ANDROID_VP9ENCODERTYPE */
     OMX_IndexParamVideoAndroidImageGrid,            /**< reference: OMX_VIDEO_PARAM_ANDROID_IMAGEGRIDTYPE */
+    OMX_IndexParamVideoAndroidRequiresSwRenderer,   /**< reference: OMX_PARAM_U32TYPE */
     OMX_IndexExtVideoEndUnused,
 
     /* Image & Video common configurations */
diff --git a/include/input/InputWindow.h b/include/input/InputWindow.h
index c44db51..a695a8f 100644
--- a/include/input/InputWindow.h
+++ b/include/input/InputWindow.h
@@ -123,17 +123,17 @@
     // input windows that have the same token.
     sp<IBinder> token;
     // This uniquely identifies the input window.
-    int32_t id = 0;
+    int32_t id = -1;
     std::string name;
-    int32_t layoutParamsFlags;
-    int32_t layoutParamsType;
-    nsecs_t dispatchingTimeout;
+    int32_t layoutParamsFlags = 0;
+    int32_t layoutParamsType = 0;
+    nsecs_t dispatchingTimeout = -1;
 
     /* These values are filled in by SurfaceFlinger. */
-    int32_t frameLeft;
-    int32_t frameTop;
-    int32_t frameRight;
-    int32_t frameBottom;
+    int32_t frameLeft = -1;
+    int32_t frameTop = -1;
+    int32_t frameRight = -1;
+    int32_t frameBottom = -1;
 
     /*
      * SurfaceFlinger consumes this value to shrink the computed frame. This is
@@ -145,7 +145,7 @@
 
     // A global scaling factor for all windows. Unlike windowScaleX/Y this results
     // in scaling of the TOUCH_MAJOR/TOUCH_MINOR axis.
-    float globalScaleFactor;
+    float globalScaleFactor = 1.0f;
 
     // Scaling factors applied to individual windows.
     float windowXScale = 1.0f;
@@ -156,18 +156,18 @@
      * to absolute coordinates by SurfaceFlinger once the frame is computed.
      */
     Region touchableRegion;
-    bool visible;
-    bool canReceiveKeys;
-    bool hasFocus;
-    bool hasWallpaper;
-    bool paused;
-    int32_t ownerPid;
-    int32_t ownerUid;
-    int32_t inputFeatures;
-    int32_t displayId;
+    bool visible = false;
+    bool canReceiveKeys = false;
+    bool hasFocus = false;
+    bool hasWallpaper = false;
+    bool paused = false;
+    int32_t ownerPid = -1;
+    int32_t ownerUid = -1;
+    int32_t inputFeatures = 0;
+    int32_t displayId = ADISPLAY_ID_NONE;
     int32_t portalToDisplayId = ADISPLAY_ID_NONE;
     InputApplicationInfo applicationInfo;
-    bool replaceTouchableRegionWithCrop;
+    bool replaceTouchableRegionWithCrop = false;
     wp<IBinder> touchableRegionCropHandle;
 
     void addTouchableRegion(const Rect& region);
@@ -213,7 +213,7 @@
     }
 
     inline std::string getName() const {
-        return mInfo.token ? mInfo.name : "<invalid>";
+        return !mInfo.name.empty() ? mInfo.name : "<invalid>";
     }
 
     inline nsecs_t getDispatchingTimeout(nsecs_t defaultValue) const {
diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index e6cfeb4..7298282 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -170,6 +170,7 @@
 
 aidl_interface {
     name: "libbinder_aidl_test_stub",
+    unstable: true,
     local_include_dir: "aidl",
     srcs: [":libbinder_aidl"],
     vendor_available: true,
diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index 9e89c57..d67ce15 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -997,7 +997,11 @@
     if (err >= NO_ERROR) {
         if (bwr.write_consumed > 0) {
             if (bwr.write_consumed < mOut.dataSize())
-                LOG_ALWAYS_FATAL("Driver did not consume write buffer");
+                LOG_ALWAYS_FATAL("Driver did not consume write buffer. "
+                                 "err: %s consumed: %zu of %zu",
+                                 statusToString(err).c_str(),
+                                 (size_t)bwr.write_consumed,
+                                 mOut.dataSize());
             else {
                 mOut.setDataSize(0);
                 processPostWriteDerefs();
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index beab270..9642a87 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -987,12 +987,22 @@
 
 status_t Parcel::writeString8(const String8& str)
 {
-    status_t err = writeInt32(str.bytes());
-    // only write string if its length is more than zero characters,
-    // as readString8 will only read if the length field is non-zero.
-    // this is slightly different from how writeString16 works.
-    if (str.bytes() > 0 && err == NO_ERROR) {
-        err = write(str.string(), str.bytes()+1);
+    return writeString8(str.string(), str.size());
+}
+
+status_t Parcel::writeString8(const char* str, size_t len)
+{
+    if (str == nullptr) return writeInt32(-1);
+
+    status_t err = writeInt32(len);
+    if (err == NO_ERROR) {
+        uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char));
+        if (data) {
+            memcpy(data, str, len);
+            *reinterpret_cast<char*>(data+len) = 0;
+            return NO_ERROR;
+        }
+        err = mError;
     }
     return err;
 }
@@ -1832,37 +1842,39 @@
 
 String8 Parcel::readString8() const
 {
-    String8 retString;
-    status_t status = readString8(&retString);
-    if (status != OK) {
-        // We don't care about errors here, so just return an empty string.
-        return String8();
-    }
-    return retString;
+    size_t len;
+    const char* str = readString8Inplace(&len);
+    if (str) return String8(str, len);
+    ALOGE("Reading a NULL string not supported here.");
+    return String8();
 }
 
 status_t Parcel::readString8(String8* pArg) const
 {
-    int32_t size;
-    status_t status = readInt32(&size);
-    if (status != OK) {
-        return status;
-    }
-    // watch for potential int overflow from size+1
-    if (size < 0 || size >= INT32_MAX) {
-        return BAD_VALUE;
-    }
-    // |writeString8| writes nothing for empty string.
-    if (size == 0) {
+    size_t len;
+    const char* str = readString8Inplace(&len);
+    if (str) {
+        pArg->setTo(str, len);
+        return 0;
+    } else {
         *pArg = String8();
-        return OK;
+        return UNEXPECTED_NULL;
     }
-    const char* str = (const char*)readInplace(size + 1);
-    if (str == nullptr) {
-        return BAD_VALUE;
+}
+
+const char* Parcel::readString8Inplace(size_t* outLen) const
+{
+    int32_t size = readInt32();
+    // watch for potential int overflow from size+1
+    if (size >= 0 && size < INT32_MAX) {
+        *outLen = size;
+        const char* str = (const char*)readInplace(size+1);
+        if (str != nullptr) {
+            return str;
+        }
     }
-    pArg->setTo(str, size);
-    return OK;
+    *outLen = 0;
+    return nullptr;
 }
 
 String16 Parcel::readString16() const
diff --git a/libs/binder/include/binder/Parcel.h b/libs/binder/include/binder/Parcel.h
index 4b1a758..c1f64fb 100644
--- a/libs/binder/include/binder/Parcel.h
+++ b/libs/binder/include/binder/Parcel.h
@@ -119,6 +119,7 @@
     status_t            writeDouble(double val);
     status_t            writeCString(const char* str);
     status_t            writeString8(const String8& str);
+    status_t            writeString8(const char* str, size_t len);
     status_t            writeString16(const String16& str);
     status_t            writeString16(const std::unique_ptr<String16>& str);
     status_t            writeString16(const char16_t* str, size_t len);
@@ -283,6 +284,7 @@
     const char*         readCString() const;
     String8             readString8() const;
     status_t            readString8(String8* pArg) const;
+    const char*         readString8Inplace(size_t* outLen) const;
     String16            readString16() const;
     status_t            readString16(String16* pArg) const;
     status_t            readString16(std::unique_ptr<String16>* pArg) const;
diff --git a/libs/binder/ndk/test/Android.bp b/libs/binder/ndk/test/Android.bp
index cb4b20f..5f5265c 100644
--- a/libs/binder/ndk/test/Android.bp
+++ b/libs/binder/ndk/test/Android.bp
@@ -92,6 +92,7 @@
 
 aidl_interface {
     name: "IBinderVendorDoubleLoadTest",
+    unstable: true,
     vendor: true,
     srcs: [
         "IBinderVendorDoubleLoadTest.aidl",
@@ -100,6 +101,7 @@
 
 aidl_interface {
     name: "IBinderNdkUnitTest",
+    unstable: true,
     srcs: [
         "IBinderNdkUnitTest.aidl",
         "IEmpty.aidl",
diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index c7b7551..69fdd7c 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -137,6 +137,7 @@
 
 aidl_interface {
     name: "binderStabilityTestIface",
+    unstable: true,
     srcs: [
         "IBinderStabilityTest.aidl",
     ],
diff --git a/libs/binderthreadstate/Android.bp b/libs/binderthreadstate/Android.bp
index c186110..5eb509c 100644
--- a/libs/binderthreadstate/Android.bp
+++ b/libs/binderthreadstate/Android.bp
@@ -39,6 +39,7 @@
 
 aidl_interface {
     name: "binderthreadstateutilstest.aidl",
+    unstable: true,
     srcs: ["IAidlStuff.aidl"],
 }
 
diff --git a/libs/gui/BLASTBufferQueue.cpp b/libs/gui/BLASTBufferQueue.cpp
index a8384ac..5965201 100644
--- a/libs/gui/BLASTBufferQueue.cpp
+++ b/libs/gui/BLASTBufferQueue.cpp
@@ -95,7 +95,8 @@
     if (needsDisconnect != nullptr) *needsDisconnect = disconnect;
 }
 
-BLASTBufferQueue::BLASTBufferQueue(const sp<SurfaceControl>& surface, int width, int height)
+BLASTBufferQueue::BLASTBufferQueue(const sp<SurfaceControl>& surface, int width, int height,
+                                   bool enableTripleBuffering)
       : mSurfaceControl(surface),
         mWidth(width),
         mHeight(height),
@@ -105,8 +106,7 @@
     // explicitly so that dequeueBuffer will block
     mProducer->setDequeueTimeout(std::numeric_limits<int64_t>::max());
 
-    int8_t disableTripleBuffer = property_get_bool("ro.sf.disable_triple_buffer", 0);
-    if (!disableTripleBuffer) {
+    if (enableTripleBuffering) {
         mProducer->setMaxDequeuedBufferCount(2);
     }
     mBufferItemConsumer =
@@ -189,13 +189,13 @@
     mPendingReleaseItem.item = std::move(mSubmitted.front());
     mSubmitted.pop();
 
-    processNextBufferLocked();
+    processNextBufferLocked(false);
 
     mCallbackCV.notify_all();
     decStrong((void*)transactionCallbackThunk);
 }
 
-void BLASTBufferQueue::processNextBufferLocked() {
+void BLASTBufferQueue::processNextBufferLocked(bool useNextTransaction) {
     ATRACE_CALL();
     if (mNumFrameAvailable == 0 || mNumAcquired == MAX_ACQUIRED_BUFFERS + 1) {
         return;
@@ -209,7 +209,7 @@
     SurfaceComposerClient::Transaction localTransaction;
     bool applyTransaction = true;
     SurfaceComposerClient::Transaction* t = &localTransaction;
-    if (mNextTransaction != nullptr && mUseNextTransaction) {
+    if (mNextTransaction != nullptr && useNextTransaction) {
         t = mNextTransaction;
         mNextTransaction = nullptr;
         applyTransaction = false;
@@ -274,16 +274,14 @@
         while (mNumFrameAvailable > 0 || mNumAcquired == MAX_ACQUIRED_BUFFERS + 1) {
             mCallbackCV.wait(_lock);
         }
-        mUseNextTransaction = true;
     }
     // add to shadow queue
     mNumFrameAvailable++;
-    processNextBufferLocked();
+    processNextBufferLocked(true);
 }
 
 void BLASTBufferQueue::setNextTransaction(SurfaceComposerClient::Transaction* t) {
     std::lock_guard _lock{mMutex};
-    mUseNextTransaction = false;
     mNextTransaction = t;
 }
 
diff --git a/libs/gui/BufferQueueProducer.cpp b/libs/gui/BufferQueueProducer.cpp
index 3f4c5da..a7cf39a 100644
--- a/libs/gui/BufferQueueProducer.cpp
+++ b/libs/gui/BufferQueueProducer.cpp
@@ -655,8 +655,9 @@
         }
 
         listener = mCore->mConsumerListener;
-        if (listener != nullptr) {
-            listener->onFrameDetached(mSlots[slot].mGraphicBuffer->getId());
+        auto gb = mSlots[slot].mGraphicBuffer;
+        if (listener != nullptr && gb != nullptr) {
+            listener->onFrameDetached(gb->getId());
         }
         mSlots[slot].mBufferState.detachProducer();
         mCore->mActiveBuffers.erase(slot);
@@ -1120,8 +1121,9 @@
         mCore->mFreeBuffers.push_back(slot);
     }
 
-    if (mCore->mConsumerListener != nullptr) {
-        mCore->mConsumerListener->onFrameCancelled(mSlots[slot].mGraphicBuffer->getId());
+    auto gb = mSlots[slot].mGraphicBuffer;
+    if (mCore->mConsumerListener != nullptr && gb != nullptr) {
+        mCore->mConsumerListener->onFrameCancelled(gb->getId());
     }
     mSlots[slot].mFence = fence;
     mCore->mDequeueCondition.notify_all();
diff --git a/libs/gui/include/gui/BLASTBufferQueue.h b/libs/gui/include/gui/BLASTBufferQueue.h
index 64c21e0..2320771 100644
--- a/libs/gui/include/gui/BLASTBufferQueue.h
+++ b/libs/gui/include/gui/BLASTBufferQueue.h
@@ -66,7 +66,9 @@
     : public ConsumerBase::FrameAvailableListener, public BufferItemConsumer::BufferFreedListener
 {
 public:
-    BLASTBufferQueue(const sp<SurfaceControl>& surface, int width, int height);
+    BLASTBufferQueue(const sp<SurfaceControl>& surface, int width, int height,
+                     bool enableTripleBuffering = true);
+
     sp<IGraphicBufferProducer> getIGraphicBufferProducer() const {
         return mProducer;
     }
@@ -90,7 +92,7 @@
     BLASTBufferQueue& operator = (const BLASTBufferQueue& rhs);
     BLASTBufferQueue(const BLASTBufferQueue& rhs);
 
-    void processNextBufferLocked() REQUIRES(mMutex);
+    void processNextBufferLocked(bool useNextTransaction) REQUIRES(mMutex);
     Rect computeCrop(const BufferItem& item);
 
     sp<SurfaceControl> mSurfaceControl;
@@ -123,8 +125,6 @@
     sp<BLASTBufferItemConsumer> mBufferItemConsumer;
 
     SurfaceComposerClient::Transaction* mNextTransaction GUARDED_BY(mMutex);
-
-    bool mUseNextTransaction = false;
 };
 
 } // namespace android
diff --git a/libs/gui/include/gui/DisplayEventReceiver.h b/libs/gui/include/gui/DisplayEventReceiver.h
index 109e28b..d9a0253 100644
--- a/libs/gui/include/gui/DisplayEventReceiver.h
+++ b/libs/gui/include/gui/DisplayEventReceiver.h
@@ -65,6 +65,7 @@
 
         struct VSync {
             uint32_t count;
+            nsecs_t expectedVSyncTimestamp;
         };
 
         struct Hotplug {
diff --git a/libs/gui/tests/Android.bp b/libs/gui/tests/Android.bp
index 7f960ab..a6bcd10 100644
--- a/libs/gui/tests/Android.bp
+++ b/libs/gui/tests/Android.bp
@@ -39,6 +39,7 @@
     shared_libs: [
         "android.hardware.configstore@1.0",
         "android.hardware.configstore-utils",
+        "libSurfaceFlingerProp",
         "libbase",
         "liblog",
         "libEGL",
@@ -53,6 +54,8 @@
         "libutils",
         "libnativewindow"
     ],
+
+    header_libs: ["libsurfaceflinger_headers"],
 }
 
 // Build a separate binary to $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
diff --git a/libs/gui/tests/BLASTBufferQueue_test.cpp b/libs/gui/tests/BLASTBufferQueue_test.cpp
index a87ccd6..d929a59 100644
--- a/libs/gui/tests/BLASTBufferQueue_test.cpp
+++ b/libs/gui/tests/BLASTBufferQueue_test.cpp
@@ -722,5 +722,8 @@
     ASSERT_EQ(2, events->frameNumber);
     ASSERT_EQ(requestedPresentTimeB, events->requestedPresentTime);
     ASSERT_GE(events->postedTime, postedTimeB);
+
+    // wait for any callbacks that have not been received
+    adapter.waitForCallbacks();
 }
 } // namespace android
diff --git a/libs/gui/tests/RegionSampling_test.cpp b/libs/gui/tests/RegionSampling_test.cpp
index dbd4ef9..6746b0a 100644
--- a/libs/gui/tests/RegionSampling_test.cpp
+++ b/libs/gui/tests/RegionSampling_test.cpp
@@ -240,6 +240,19 @@
     float const luma_gray = 0.50;
 };
 
+TEST_F(RegionSamplingTest, invalidLayerHandle_doesNotCrash) {
+    sp<ISurfaceComposer> composer = ComposerService::getComposerService();
+    sp<Listener> listener = new Listener();
+    const Rect sampleArea{100, 100, 200, 200};
+    // Passing in composer service as the layer handle should not crash, we'll
+    // treat it as a layer that no longer exists and silently allow sampling to
+    // occur.
+    status_t status = composer->addRegionSamplingListener(sampleArea,
+                                                          IInterface::asBinder(composer), listener);
+    ASSERT_EQ(NO_ERROR, status);
+    composer->removeRegionSamplingListener(listener);
+}
+
 TEST_F(RegionSamplingTest, DISABLED_CollectsLuma) {
     fill_render(rgba_green);
 
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index 2de6b69..d1d770e 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -18,17 +18,18 @@
 
 #include <gtest/gtest.h>
 
+#include <SurfaceFlingerProperties.h>
 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 #include <binder/ProcessState.h>
 #include <configstore/Utils.h>
 #include <cutils/properties.h>
-#include <inttypes.h>
 #include <gui/BufferItemConsumer.h>
 #include <gui/IDisplayEventConnection.h>
 #include <gui/IProducerListener.h>
 #include <gui/ISurfaceComposer.h>
 #include <gui/Surface.h>
 #include <gui/SurfaceComposerClient.h>
+#include <inttypes.h>
 #include <private/gui/ComposerService.h>
 #include <ui/Rect.h>
 #include <utils/String8.h>
@@ -46,11 +47,9 @@
 
 using Transaction = SurfaceComposerClient::Transaction;
 
-static bool hasWideColorDisplay =
-        getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::hasWideColorDisplay>(false);
+static bool hasWideColorDisplay = android::sysprop::has_wide_color_display(false);
 
-static bool hasHdrDisplay =
-        getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::hasHDRDisplay>(false);
+static bool hasHdrDisplay = android::sysprop::has_HDR_display(false);
 
 class FakeSurfaceComposer;
 class FakeProducerFrameEventHistory;
diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index ef7cc7d..11af23e 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -468,7 +468,7 @@
     msg.body.key.deviceId = deviceId;
     msg.body.key.source = source;
     msg.body.key.displayId = displayId;
-    msg.body.key.hmac = hmac;
+    msg.body.key.hmac = std::move(hmac);
     msg.body.key.action = action;
     msg.body.key.flags = flags;
     msg.body.key.keyCode = keyCode;
@@ -526,7 +526,7 @@
     msg.body.motion.deviceId = deviceId;
     msg.body.motion.source = source;
     msg.body.motion.displayId = displayId;
-    msg.body.motion.hmac = hmac;
+    msg.body.motion.hmac = std::move(hmac);
     msg.body.motion.action = action;
     msg.body.motion.actionButton = actionButton;
     msg.body.motion.flags = flags;
diff --git a/libs/input/InputWindow.cpp b/libs/input/InputWindow.cpp
index 03ca459..6e4c97d 100644
--- a/libs/input/InputWindow.cpp
+++ b/libs/input/InputWindow.cpp
@@ -65,7 +65,7 @@
 }
 
 status_t InputWindowInfo::write(Parcel& output) const {
-    if (token == nullptr) {
+    if (name.empty()) {
         output.writeInt32(0);
         return OK;
     }
@@ -110,12 +110,7 @@
         return ret;
     }
 
-    sp<IBinder> token = from.readStrongBinder();
-    if (token == nullptr) {
-        return ret;
-    }
-
-    ret.token = token;
+    ret.token = from.readStrongBinder();
     ret.id = from.readInt32();
     ret.name = from.readString8().c_str();
     ret.layoutParamsFlags = from.readInt32();
diff --git a/libs/nativewindow/Android.bp b/libs/nativewindow/Android.bp
index 55400c7..5baec2f 100644
--- a/libs/nativewindow/Android.bp
+++ b/libs/nativewindow/Android.bp
@@ -59,7 +59,6 @@
     ],
 
     shared_libs: [
-        "libhardware",
         "libcutils",
         "liblog",
         "libutils",
diff --git a/libs/renderengine/gl/GLESRenderEngine.cpp b/libs/renderengine/gl/GLESRenderEngine.cpp
index 36a54a7..b0b4f6c 100644
--- a/libs/renderengine/gl/GLESRenderEngine.cpp
+++ b/libs/renderengine/gl/GLESRenderEngine.cpp
@@ -147,52 +147,6 @@
     return NAME_NOT_FOUND;
 }
 
-class EGLAttributeVector {
-    struct Attribute;
-    class Adder;
-    friend class Adder;
-    KeyedVector<Attribute, EGLint> mList;
-    struct Attribute {
-        Attribute() : v(0){};
-        explicit Attribute(EGLint v) : v(v) {}
-        EGLint v;
-        bool operator<(const Attribute& other) const {
-            // this places EGL_NONE at the end
-            EGLint lhs(v);
-            EGLint rhs(other.v);
-            if (lhs == EGL_NONE) lhs = 0x7FFFFFFF;
-            if (rhs == EGL_NONE) rhs = 0x7FFFFFFF;
-            return lhs < rhs;
-        }
-    };
-    class Adder {
-        friend class EGLAttributeVector;
-        EGLAttributeVector& v;
-        EGLint attribute;
-        Adder(EGLAttributeVector& v, EGLint attribute) : v(v), attribute(attribute) {}
-
-    public:
-        void operator=(EGLint value) {
-            if (attribute != EGL_NONE) {
-                v.mList.add(Attribute(attribute), value);
-            }
-        }
-        operator EGLint() const { return v.mList[attribute]; }
-    };
-
-public:
-    EGLAttributeVector() { mList.add(Attribute(EGL_NONE), EGL_NONE); }
-    void remove(EGLint attribute) {
-        if (attribute != EGL_NONE) {
-            mList.removeItem(Attribute(attribute));
-        }
-    }
-    Adder operator[](EGLint attribute) { return Adder(*this, attribute); }
-    EGLint operator[](EGLint attribute) const { return mList[attribute]; }
-    // cast-operator to (EGLint const*)
-    operator EGLint const*() const { return &mList.keyAt(0).v; }
-};
-
 static status_t selectEGLConfig(EGLDisplay display, EGLint format, EGLint renderableType,
                                 EGLConfig* config) {
     // select our EGLConfig. It must support EGL_RECORDABLE_ANDROID if
@@ -201,16 +155,33 @@
     EGLint wantedAttribute;
     EGLint wantedAttributeValue;
 
-    EGLAttributeVector attribs;
+    std::vector<EGLint> attribs;
     if (renderableType) {
-        attribs[EGL_RENDERABLE_TYPE] = renderableType;
-        attribs[EGL_RECORDABLE_ANDROID] = EGL_TRUE;
-        attribs[EGL_SURFACE_TYPE] = EGL_WINDOW_BIT | EGL_PBUFFER_BIT;
-        attribs[EGL_FRAMEBUFFER_TARGET_ANDROID] = EGL_TRUE;
-        attribs[EGL_RED_SIZE] = 8;
-        attribs[EGL_GREEN_SIZE] = 8;
-        attribs[EGL_BLUE_SIZE] = 8;
-        attribs[EGL_ALPHA_SIZE] = 8;
+        const ui::PixelFormat pixelFormat = static_cast<ui::PixelFormat>(format);
+        const bool is1010102 = pixelFormat == ui::PixelFormat::RGBA_1010102;
+
+        // Default to 8 bits per channel.
+        const EGLint tmpAttribs[] = {
+                EGL_RENDERABLE_TYPE,
+                renderableType,
+                EGL_RECORDABLE_ANDROID,
+                EGL_TRUE,
+                EGL_SURFACE_TYPE,
+                EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
+                EGL_FRAMEBUFFER_TARGET_ANDROID,
+                EGL_TRUE,
+                EGL_RED_SIZE,
+                is1010102 ? 10 : 8,
+                EGL_GREEN_SIZE,
+                is1010102 ? 10 : 8,
+                EGL_BLUE_SIZE,
+                is1010102 ? 10 : 8,
+                EGL_ALPHA_SIZE,
+                is1010102 ? 2 : 8,
+                EGL_NONE,
+        };
+        std::copy(tmpAttribs, tmpAttribs + (sizeof(tmpAttribs) / sizeof(EGLint)),
+                  std::back_inserter(attribs));
         wantedAttribute = EGL_NONE;
         wantedAttributeValue = EGL_NONE;
     } else {
@@ -219,7 +190,8 @@
         wantedAttributeValue = format;
     }
 
-    err = selectConfigForAttribute(display, attribs, wantedAttribute, wantedAttributeValue, config);
+    err = selectConfigForAttribute(display, attribs.data(), wantedAttribute, wantedAttributeValue,
+                                   config);
     if (err == NO_ERROR) {
         EGLint caveat;
         if (eglGetConfigAttrib(display, *config, EGL_CONFIG_CAVEAT, &caveat))
@@ -897,13 +869,32 @@
     return glStatus == GL_FRAMEBUFFER_COMPLETE_OES ? NO_ERROR : BAD_VALUE;
 }
 
-void GLESRenderEngine::unbindFrameBuffer(Framebuffer* /* framebuffer */) {
+void GLESRenderEngine::unbindFrameBuffer(Framebuffer* /*framebuffer*/) {
     ATRACE_CALL();
 
     // back to main framebuffer
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 
+bool GLESRenderEngine::cleanupPostRender() {
+    ATRACE_CALL();
+
+    if (mPriorResourcesCleaned ||
+        (mLastDrawFence != nullptr && mLastDrawFence->getStatus() != Fence::Status::Signaled)) {
+        // If we don't have a prior frame needing cleanup, then don't do anything.
+        return false;
+    }
+
+    // Bind the texture to dummy data so that backing image data can be freed.
+    GLFramebuffer* glFramebuffer = static_cast<GLFramebuffer*>(getFramebufferForDrawing());
+    glFramebuffer->allocateBuffers(1, 1, mPlaceholderDrawBuffer);
+    // Release the cached fence here, so that we don't churn reallocations when
+    // we could no-op repeated calls of this method instead.
+    mLastDrawFence = nullptr;
+    mPriorResourcesCleaned = true;
+    return true;
+}
+
 void GLESRenderEngine::checkErrors() const {
     checkErrors(nullptr);
 }
@@ -1189,7 +1180,13 @@
             // us bad parameters, or we messed up our shader generation).
             return INVALID_OPERATION;
         }
+        mLastDrawFence = nullptr;
+    } else {
+        // The caller takes ownership of drawFence, so we need to duplicate the
+        // fd here.
+        mLastDrawFence = new Fence(dup(drawFence->get()));
     }
+    mPriorResourcesCleaned = false;
 
     checkErrors();
     return NO_ERROR;
diff --git a/libs/renderengine/gl/GLESRenderEngine.h b/libs/renderengine/gl/GLESRenderEngine.h
index 32dbad1..42b8537 100644
--- a/libs/renderengine/gl/GLESRenderEngine.h
+++ b/libs/renderengine/gl/GLESRenderEngine.h
@@ -17,7 +17,6 @@
 #ifndef SF_GLESRENDERENGINE_H_
 #define SF_GLESRENDERENGINE_H_
 
-#include <stdint.h>
 #include <condition_variable>
 #include <deque>
 #include <mutex>
@@ -76,6 +75,7 @@
                         const std::vector<const LayerSettings*>& layers,
                         ANativeWindowBuffer* buffer, const bool useFramebufferCache,
                         base::unique_fd&& bufferFence, base::unique_fd* drawFence) override;
+    bool cleanupPostRender() override;
 
     EGLDisplay getEGLDisplay() const { return mEGLDisplay; }
     // Creates an output image for rendering to
@@ -231,6 +231,17 @@
     std::mutex mRenderingMutex;
 
     std::unique_ptr<Framebuffer> mDrawingBuffer;
+    // this is a 1x1 RGB buffer, but over-allocate in case a driver wants more
+    // memory or if it needs to satisfy alignment requirements. In this case:
+    // assume that each channel requires 4 bytes, and add 3 additional bytes to
+    // ensure that we align on a word. Allocating 16 bytes will provide a
+    // guarantee that we don't clobber memory.
+    uint32_t mPlaceholderDrawBuffer[4];
+    sp<Fence> mLastDrawFence;
+    // Store a separate boolean checking if prior resources were cleaned up, as
+    // devices that don't support native sync fences can't rely on a last draw
+    // fence that doesn't exist.
+    bool mPriorResourcesCleaned = true;
 
     // Blur effect processor, only instantiated when a layer requests it.
     BlurFilter* mBlurFilter = nullptr;
diff --git a/libs/renderengine/gl/GLFramebuffer.cpp b/libs/renderengine/gl/GLFramebuffer.cpp
index cb0d5cf..383486b 100644
--- a/libs/renderengine/gl/GLFramebuffer.cpp
+++ b/libs/renderengine/gl/GLFramebuffer.cpp
@@ -68,11 +68,11 @@
     return true;
 }
 
-void GLFramebuffer::allocateBuffers(uint32_t width, uint32_t height) {
+void GLFramebuffer::allocateBuffers(uint32_t width, uint32_t height, void* data) {
     ATRACE_CALL();
 
     glBindTexture(GL_TEXTURE_2D, mTextureName);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
diff --git a/libs/renderengine/gl/GLFramebuffer.h b/libs/renderengine/gl/GLFramebuffer.h
index b88da3b..6757695 100644
--- a/libs/renderengine/gl/GLFramebuffer.h
+++ b/libs/renderengine/gl/GLFramebuffer.h
@@ -39,7 +39,7 @@
 
     bool setNativeWindowBuffer(ANativeWindowBuffer* nativeBuffer, bool isProtected,
                                const bool useFramebufferCache) override;
-    void allocateBuffers(uint32_t width, uint32_t height);
+    void allocateBuffers(uint32_t width, uint32_t height, void* data = nullptr);
     EGLImageKHR getEGLImage() const { return mEGLImage; }
     uint32_t getTextureName() const { return mTextureName; }
     uint32_t getFramebufferName() const { return mFramebufferName; }
diff --git a/libs/renderengine/gl/filters/BlurFilter.cpp b/libs/renderengine/gl/filters/BlurFilter.cpp
index 724877b..db55d17 100644
--- a/libs/renderengine/gl/filters/BlurFilter.cpp
+++ b/libs/renderengine/gl/filters/BlurFilter.cpp
@@ -261,15 +261,6 @@
     return shader;
 }
 
-void BlurFilter::blit(GLFramebuffer& read, GLFramebuffer& draw) const {
-    ATRACE_NAME("BlurFilter::blit");
-    read.bindAsReadBuffer();
-    draw.bindAsDrawBuffer();
-    glBlitFramebuffer(0, 0, read.getBufferWidth(), read.getBufferHeight(), 0, 0,
-                      draw.getBufferWidth(), draw.getBufferHeight(), GL_COLOR_BUFFER_BIT,
-                      GL_LINEAR);
-}
-
 } // namespace gl
 } // namespace renderengine
 } // namespace android
diff --git a/libs/renderengine/gl/filters/BlurFilter.h b/libs/renderengine/gl/filters/BlurFilter.h
index 7e0819f..9d3fc60 100644
--- a/libs/renderengine/gl/filters/BlurFilter.h
+++ b/libs/renderengine/gl/filters/BlurFilter.h
@@ -56,7 +56,6 @@
 private:
     uint32_t mRadius;
     void drawMesh(GLuint uv, GLuint position);
-    void blit(GLFramebuffer& read, GLFramebuffer& draw) const;
     string getVertexShader() const;
     string getFragmentShader() const;
     string getMixFragShader() const;
diff --git a/libs/renderengine/include/renderengine/RenderEngine.h b/libs/renderengine/include/renderengine/RenderEngine.h
index 46f3fc6..e06e128 100644
--- a/libs/renderengine/include/renderengine/RenderEngine.h
+++ b/libs/renderengine/include/renderengine/RenderEngine.h
@@ -111,6 +111,14 @@
     // Returns NO_ERROR when binds successfully, NO_MEMORY when there's no memory for allocation.
     virtual status_t bindFrameBuffer(Framebuffer* framebuffer) = 0;
     virtual void unbindFrameBuffer(Framebuffer* framebuffer) = 0;
+    // Clean-up method that should be called on the main thread after the
+    // drawFence returned by drawLayers fires. This method will free up
+    // resources used by the most recently drawn frame. If the frame is still
+    // being drawn, then this call is silently ignored.
+    //
+    // Returns true if resources were cleaned up, and false if we didn't need to
+    // do any work.
+    virtual bool cleanupPostRender() = 0;
 
     // queries
     virtual size_t getMaxTextureSize() const = 0;
diff --git a/libs/renderengine/include/renderengine/mock/RenderEngine.h b/libs/renderengine/include/renderengine/mock/RenderEngine.h
index 3358c69..df0f17a 100644
--- a/libs/renderengine/include/renderengine/mock/RenderEngine.h
+++ b/libs/renderengine/include/renderengine/mock/RenderEngine.h
@@ -22,6 +22,7 @@
 #include <renderengine/Mesh.h>
 #include <renderengine/RenderEngine.h>
 #include <renderengine/Texture.h>
+#include <ui/Fence.h>
 #include <ui/GraphicBuffer.h>
 #include <ui/Region.h>
 
@@ -55,6 +56,7 @@
     MOCK_CONST_METHOD0(isProtected, bool());
     MOCK_CONST_METHOD0(supportsProtectedContent, bool());
     MOCK_METHOD1(useProtectedContext, bool(bool));
+    MOCK_METHOD0(cleanupPostRender, bool());
     MOCK_METHOD6(drawLayers,
                  status_t(const DisplaySettings&, const std::vector<const LayerSettings*>&,
                           ANativeWindowBuffer*, const bool, base::unique_fd&&, base::unique_fd*));
diff --git a/libs/renderengine/tests/RenderEngineTest.cpp b/libs/renderengine/tests/RenderEngineTest.cpp
index f5bf014..16a8a0d 100644
--- a/libs/renderengine/tests/RenderEngineTest.cpp
+++ b/libs/renderengine/tests/RenderEngineTest.cpp
@@ -1241,12 +1241,12 @@
     EXPECT_EQ(NO_ERROR, barrier->result);
 }
 
-TEST_F(RenderEngineTest, drawLayers_bindExternalBufferWithNullBuffer) {
+TEST_F(RenderEngineTest, bindExternalBuffer_withNullBuffer) {
     status_t result = sRE->bindExternalTextureBuffer(0, nullptr, nullptr);
     ASSERT_EQ(BAD_VALUE, result);
 }
 
-TEST_F(RenderEngineTest, drawLayers_bindExternalBufferCachesImages) {
+TEST_F(RenderEngineTest, bindExternalBuffer_cachesImages) {
     sp<GraphicBuffer> buf = allocateSourceBuffer(1, 1);
     uint32_t texName;
     sRE->genTextures(1, &texName);
@@ -1266,7 +1266,7 @@
     EXPECT_FALSE(sRE->isImageCachedForTesting(bufferId));
 }
 
-TEST_F(RenderEngineTest, drawLayers_cacheExternalBufferWithNullBuffer) {
+TEST_F(RenderEngineTest, cacheExternalBuffer_withNullBuffer) {
     std::shared_ptr<renderengine::gl::ImageManager::Barrier> barrier =
             sRE->cacheExternalTextureBufferForTesting(nullptr);
     std::lock_guard<std::mutex> lock(barrier->mutex);
@@ -1278,7 +1278,7 @@
     EXPECT_EQ(BAD_VALUE, barrier->result);
 }
 
-TEST_F(RenderEngineTest, drawLayers_cacheExternalBufferCachesImages) {
+TEST_F(RenderEngineTest, cacheExternalBuffer_cachesImages) {
     sp<GraphicBuffer> buf = allocateSourceBuffer(1, 1);
     uint64_t bufferId = buf->getId();
     std::shared_ptr<renderengine::gl::ImageManager::Barrier> barrier =
@@ -1401,6 +1401,35 @@
                       backgroundColor.a);
 }
 
+TEST_F(RenderEngineTest, cleanupPostRender_cleansUpOnce) {
+    renderengine::DisplaySettings settings;
+    settings.physicalDisplay = fullscreenRect();
+    settings.clip = fullscreenRect();
+
+    std::vector<const renderengine::LayerSettings*> layers;
+    renderengine::LayerSettings layer;
+    layer.geometry.boundaries = fullscreenRect().toFloatRect();
+    BufferSourceVariant<ForceOpaqueBufferVariant>::fillColor(layer, 1.0f, 0.0f, 0.0f, this);
+    layer.alpha = 1.0;
+    layers.push_back(&layer);
+
+    base::unique_fd fenceOne;
+    sRE->drawLayers(settings, layers, mBuffer->getNativeBuffer(), true, base::unique_fd(),
+                    &fenceOne);
+    base::unique_fd fenceTwo;
+    sRE->drawLayers(settings, layers, mBuffer->getNativeBuffer(), true, std::move(fenceOne),
+                    &fenceTwo);
+
+    const int fd = fenceTwo.get();
+    if (fd >= 0) {
+        sync_wait(fd, -1);
+    }
+
+    // Only cleanup the first time.
+    EXPECT_TRUE(sRE->cleanupPostRender());
+    EXPECT_FALSE(sRE->cleanupPostRender());
+}
+
 } // namespace android
 
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
diff --git a/libs/vr/libpdx_uds/service_endpoint.cpp b/libs/vr/libpdx_uds/service_endpoint.cpp
index ecbfdba..9bc70ea 100644
--- a/libs/vr/libpdx_uds/service_endpoint.cpp
+++ b/libs/vr/libpdx_uds/service_endpoint.cpp
@@ -535,13 +535,13 @@
   *message = Message{info};
   auto* state = static_cast<MessageState*>(message->GetState());
   state->request = std::move(request);
-  if (request.send_len > 0 && !request.is_impulse) {
-    state->request_data.resize(request.send_len);
+  if (state->request.send_len > 0 && !state->request.is_impulse) {
+    state->request_data.resize(state->request.send_len);
     status = ReceiveData(channel_fd, state->request_data.data(),
                          state->request_data.size());
   }
 
-  if (status && request.is_impulse)
+  if (status && state->request.is_impulse)
     status = ReenableEpollEvent(channel_fd);
 
   if (!status) {
diff --git a/libs/vr/libvrflinger/tests/Android.bp b/libs/vr/libvrflinger/tests/Android.bp
index 410e234..7fafd3b 100644
--- a/libs/vr/libvrflinger/tests/Android.bp
+++ b/libs/vr/libvrflinger/tests/Android.bp
@@ -11,6 +11,7 @@
     "libutils",
     "libnativewindow",
     "libpdx_default_transport",
+    "libSurfaceFlingerProp",
 ]
 
 static_libs = [
@@ -32,5 +33,6 @@
         "-Wall",
         "-Werror",
     ],
+    header_libs: ["libsurfaceflinger_headers"],
     name: "vrflinger_test",
 }
diff --git a/libs/vr/libvrflinger/tests/vrflinger_test.cpp b/libs/vr/libvrflinger/tests/vrflinger_test.cpp
index 7075e88..efd6d1d 100644
--- a/libs/vr/libvrflinger/tests/vrflinger_test.cpp
+++ b/libs/vr/libvrflinger/tests/vrflinger_test.cpp
@@ -1,3 +1,4 @@
+#include <SurfaceFlingerProperties.h>
 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 #include <android/hardware/configstore/1.1/types.h>
 #include <android/hardware_buffer.h>
@@ -147,9 +148,7 @@
   // Exit immediately if the device doesn't support vr flinger. This ConfigStore
   // check is the same mechanism used by surface flinger to decide if it should
   // initialize vr flinger.
-  bool vr_flinger_enabled =
-      getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::useVrFlinger>(
-          false);
+  bool vr_flinger_enabled = android::sysprop::use_vr_flinger(false);
   if (!vr_flinger_enabled) {
     return;
   }
diff --git a/opengl/libs/Android.bp b/opengl/libs/Android.bp
index e255b9d..19b8a58 100644
--- a/opengl/libs/Android.bp
+++ b/opengl/libs/Android.bp
@@ -154,6 +154,7 @@
         "libnativebridge_lazy",
         "libnativeloader_lazy",
         "libutils",
+        "libSurfaceFlingerProp",
     ],
     static_libs: [
         "libEGL_getProcAddress",
@@ -165,6 +166,7 @@
         symbol_file: "libEGL.map.txt",
         versions: ["29"],
     },
+    header_libs: ["libsurfaceflinger_headers"],
 }
 
 cc_test {
diff --git a/opengl/libs/EGL/Loader.cpp b/opengl/libs/EGL/Loader.cpp
index e19802b..d664e4d 100644
--- a/opengl/libs/EGL/Loader.cpp
+++ b/opengl/libs/EGL/Loader.cpp
@@ -222,13 +222,6 @@
         return cnx->dso;
     }
 
-    // Check if we should use ANGLE early, so loading each driver doesn't require repeated queries.
-    if (android::GraphicsEnv::getInstance().shouldUseAngle()) {
-        cnx->shouldUseAngle = true;
-    } else {
-        cnx->shouldUseAngle = false;
-    }
-
     // Firstly, try to load ANGLE driver.
     driver_t* hnd = attempt_to_load_angle(cnx);
     if (!hnd) {
@@ -278,6 +271,12 @@
     if (!hnd) {
         android::GraphicsEnv::getInstance().setDriverLoaded(android::GpuStatsInfo::Api::API_GL,
                                                             false, systemTime() - openTime);
+    } else {
+        // init_angle_backend will check if loaded driver is ANGLE or not,
+        // will set cnx->useAngle appropriately.
+        // Do this here so that we use ANGLE path when driver is ANGLE (e.g. loaded as native),
+        // not just loading ANGLE as option.
+        init_angle_backend(hnd->dso[0], cnx);
     }
 
     LOG_ALWAYS_FATAL_IF(!hnd,
@@ -317,14 +316,7 @@
     delete hnd;
     cnx->dso = nullptr;
 
-    cnx->shouldUseAngle = false;
-    cnx->angleDecided = false;
     cnx->useAngle = false;
-
-    if (cnx->vendorEGL) {
-        dlclose(cnx->vendorEGL);
-        cnx->vendorEGL = nullptr;
-    }
 }
 
 void Loader::init_api(void* dso,
@@ -491,7 +483,7 @@
     return dso;
 }
 
-static void* load_angle_from_namespace(const char* kind, android_namespace_t* ns) {
+static void* load_angle(const char* kind, android_namespace_t* ns) {
     const android_dlextinfo dlextinfo = {
             .flags = ANDROID_DLEXT_USE_NAMESPACE,
             .library_namespace = ns,
@@ -511,69 +503,6 @@
     return nullptr;
 }
 
-static void* load_angle(const char* kind, android_namespace_t* ns, egl_connection_t* cnx) {
-    void* so = nullptr;
-
-    if ((cnx->shouldUseAngle) || android::GraphicsEnv::getInstance().shouldUseAngle()) {
-        so = load_angle_from_namespace(kind, ns);
-        cnx->shouldUseAngle = true;
-    } else {
-        cnx->shouldUseAngle = false;
-    }
-
-    if (so) {
-        ALOGV("Loaded ANGLE %s library for '%s' (instead of native)", kind,
-            android::GraphicsEnv::getInstance().getAngleAppName().c_str());
-        cnx->useAngle = true;
-
-        char prop[PROPERTY_VALUE_MAX];
-
-        property_get("debug.hwui.renderer", prop, "UNSET");
-        ALOGV("Skia's renderer set to %s", prop);
-
-        EGLint angleBackendDefault = EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE;
-        property_get("debug.angle.backend", prop, "0");
-        switch (atoi(prop)) {
-            case 1:
-                ALOGV("%s: Requesting OpenGLES back-end", __FUNCTION__);
-                angleBackendDefault = EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE;
-                break;
-            case 2:
-                ALOGV("%s: Requesting Vulkan back-end", __FUNCTION__);
-                angleBackendDefault = EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE;
-                break;
-            default:
-                break;
-        }
-
-        cnx->angleBackend = angleBackendDefault;
-        if (!cnx->vendorEGL && (cnx->angleBackend == EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE)) {
-            // Find and load vendor libEGL for ANGLE's GL back-end to use.
-            char prop[PROPERTY_VALUE_MAX + 1];
-            for (auto key : HAL_SUBNAME_KEY_PROPERTIES) {
-                if (property_get(key, prop, nullptr) <= 0) {
-                    continue;
-                }
-                void* dso = load_system_driver("EGL", prop, true);
-                if (dso) {
-                    cnx->vendorEGL = dso;
-                    break;
-                }
-            }
-            if (!cnx->vendorEGL) {
-                cnx->vendorEGL = load_system_driver("EGL", nullptr, true);
-            }
-        }
-    } else {
-        ALOGV("Loaded native %s library for '%s' (instead of ANGLE)", kind,
-            android::GraphicsEnv::getInstance().getAngleAppName().c_str());
-        cnx->useAngle = false;
-    }
-    cnx->angleDecided = true;
-
-    return so;
-}
-
 static void* load_updated_driver(const char* kind, android_namespace_t* ns) {
     ATRACE_CALL();
     const android_dlextinfo dlextinfo = {
@@ -597,6 +526,11 @@
 
 Loader::driver_t* Loader::attempt_to_load_angle(egl_connection_t* cnx) {
     ATRACE_CALL();
+
+    if (!android::GraphicsEnv::getInstance().shouldUseAngle()) {
+        return nullptr;
+    }
+
     android_namespace_t* ns = android::GraphicsEnv::getInstance().getAngleNamespace();
     if (!ns) {
         return nullptr;
@@ -606,22 +540,37 @@
     driver_t* hnd = nullptr;
 
     // ANGLE doesn't ship with GLES library, and thus we skip GLES driver.
-    void* dso = load_angle("EGL", ns, cnx);
+    void* dso = load_angle("EGL", ns);
     if (dso) {
         initialize_api(dso, cnx, EGL);
         hnd = new driver_t(dso);
 
-        dso = load_angle("GLESv1_CM", ns, cnx);
+        dso = load_angle("GLESv1_CM", ns);
         initialize_api(dso, cnx, GLESv1_CM);
         hnd->set(dso, GLESv1_CM);
 
-        dso = load_angle("GLESv2", ns, cnx);
+        dso = load_angle("GLESv2", ns);
         initialize_api(dso, cnx, GLESv2);
         hnd->set(dso, GLESv2);
     }
     return hnd;
 }
 
+void Loader::init_angle_backend(void* dso, egl_connection_t* cnx) {
+    void* eglCreateDeviceANGLE = nullptr;
+
+    ALOGV("dso: %p", dso);
+    eglCreateDeviceANGLE = dlsym(dso, "eglCreateDeviceANGLE");
+    ALOGV("eglCreateDeviceANGLE: %p", eglCreateDeviceANGLE);
+    if (eglCreateDeviceANGLE) {
+        ALOGV("ANGLE GLES library in use");
+        cnx->useAngle = true;
+    } else {
+        ALOGV("Native GLES library in use");
+        cnx->useAngle = false;
+    }
+}
+
 Loader::driver_t* Loader::attempt_to_load_updated_driver(egl_connection_t* cnx) {
     ATRACE_CALL();
 #ifndef __ANDROID_VNDK__
diff --git a/opengl/libs/EGL/Loader.h b/opengl/libs/EGL/Loader.h
index 6f31ab4..7b2d7c9 100644
--- a/opengl/libs/EGL/Loader.h
+++ b/opengl/libs/EGL/Loader.h
@@ -60,6 +60,7 @@
     driver_t* attempt_to_load_system_driver(egl_connection_t* cnx, const char* suffix, const bool exact);
     void unload_system_driver(egl_connection_t* cnx);
     void initialize_api(void* dso, egl_connection_t* cnx, uint32_t mask);
+    void init_angle_backend(void* dso, egl_connection_t* cnx);
 
     static __attribute__((noinline))
     void init_api(void* dso,
diff --git a/opengl/libs/EGL/egl_display.cpp b/opengl/libs/EGL/egl_display.cpp
index a58e87c..6af7cd2 100644
--- a/opengl/libs/EGL/egl_display.cpp
+++ b/opengl/libs/EGL/egl_display.cpp
@@ -31,6 +31,7 @@
 #include "egl_object.h"
 #include "egl_tls.h"
 
+#include <SurfaceFlingerProperties.h>
 #include <android/dlext.h>
 #include <dlfcn.h>
 #include <graphicsenv/GraphicsEnv.h>
@@ -133,45 +134,6 @@
     return sDisplay[uintptr_t(disp)].getPlatformDisplay(disp, attrib_list);
 }
 
-static bool addAnglePlatformAttributes(egl_connection_t* const cnx,
-                                       std::vector<EGLAttrib>& attrs) {
-    intptr_t vendorEGL = (intptr_t)cnx->vendorEGL;
-
-    attrs.reserve(4 * 2);
-
-    attrs.push_back(EGL_PLATFORM_ANGLE_TYPE_ANGLE);
-    attrs.push_back(cnx->angleBackend);
-
-    switch (cnx->angleBackend) {
-        case EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE:
-            ALOGV("%s: Requesting Vulkan ANGLE back-end", __FUNCTION__);
-            char prop[PROPERTY_VALUE_MAX];
-            property_get("debug.angle.validation", prop, "0");
-            attrs.push_back(EGL_PLATFORM_ANGLE_DEBUG_LAYERS_ENABLED_ANGLE);
-            attrs.push_back(atoi(prop));
-            break;
-        case EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE:
-            ALOGV("%s: Requesting Default ANGLE back-end", __FUNCTION__);
-            break;
-        case EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE:
-            ALOGV("%s: Requesting OpenGL ES ANGLE back-end", __FUNCTION__);
-            // NOTE: This is only valid if the backend is OpenGL
-            attrs.push_back(EGL_PLATFORM_ANGLE_EGL_HANDLE_ANGLE);
-            attrs.push_back(vendorEGL);
-
-            // Context virtualization is only available on GL back-end.
-            // Needed to support threading with GL back-end
-            attrs.push_back(EGL_PLATFORM_ANGLE_CONTEXT_VIRTUALIZATION_ANGLE);
-            attrs.push_back(EGL_FALSE);
-            break;
-        default:
-            ALOGE("%s: Requesting Unknown (%d) ANGLE back-end", __FUNCTION__, cnx->angleBackend);
-            break;
-    }
-
-    return true;
-}
-
 static EGLDisplay getPlatformDisplayAngle(EGLNativeDisplayType display, egl_connection_t* const cnx,
                                           const EGLAttrib* attrib_list, EGLint* error) {
     EGLDisplay dpy = EGL_NO_DISPLAY;
@@ -186,11 +148,14 @@
             }
         }
 
-        if (!addAnglePlatformAttributes(cnx, attrs)) {
-            ALOGE("eglGetDisplay(%p) failed: Mismatch display request", display);
-            *error = EGL_BAD_PARAMETER;
-            return EGL_NO_DISPLAY;
-        }
+        attrs.push_back(EGL_PLATFORM_ANGLE_TYPE_ANGLE);
+        attrs.push_back(EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE);
+
+        char prop[PROPERTY_VALUE_MAX];
+        property_get("debug.angle.validation", prop, "0");
+        attrs.push_back(EGL_PLATFORM_ANGLE_DEBUG_LAYERS_ENABLED_ANGLE);
+        attrs.push_back(atoi(prop));
+
         attrs.push_back(EGL_NONE);
 
         dpy = cnx->egl.eglGetPlatformDisplay(EGL_PLATFORM_ANGLE_ANGLE,
@@ -361,9 +326,7 @@
 
         // Note: CDD requires that devices supporting wide color and/or HDR color also support
         // the EGL_KHR_gl_colorspace extension.
-        bool wideColorBoardConfig =
-                getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::hasWideColorDisplay>(
-                        false);
+        bool wideColorBoardConfig = android::sysprop::has_wide_color_display(false);
 
         // Add wide-color extensions if device can support wide-color
         if (wideColorBoardConfig && hasColorSpaceSupport) {
@@ -373,8 +336,7 @@
                     "EGL_EXT_gl_colorspace_display_p3_passthrough ");
         }
 
-        bool hasHdrBoardConfig =
-                getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::hasHDRDisplay>(false);
+        bool hasHdrBoardConfig = android::sysprop::has_HDR_display(false);
 
         if (hasHdrBoardConfig && hasColorSpaceSupport) {
             // hasHDRBoardConfig indicates the system is capable of supporting HDR content.
diff --git a/opengl/libs/EGL/egl_platform_entries.cpp b/opengl/libs/EGL/egl_platform_entries.cpp
index c8840f9..1b75b20 100644
--- a/opengl/libs/EGL/egl_platform_entries.cpp
+++ b/opengl/libs/EGL/egl_platform_entries.cpp
@@ -721,7 +721,7 @@
 
     // NOTE: When using Vulkan backend, the Vulkan runtime makes all the
     // native_window_* calls, so don't do them here.
-    if (cnx->angleBackend != EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE) {
+    if (!cnx->useAngle) {
         int result = native_window_api_connect(window, NATIVE_WINDOW_API_EGL);
         if (result < 0) {
             ALOGE("eglCreateWindowSurface: native_window_api_connect (win=%p) "
@@ -740,14 +740,14 @@
     std::vector<AttrType> strippedAttribList;
     if (!processAttributes<AttrType>(dp, window, attrib_list, &colorSpace, &strippedAttribList)) {
         ALOGE("error invalid colorspace: %d", colorSpace);
-        if (cnx->angleBackend != EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE) {
+        if (!cnx->useAngle) {
             native_window_api_disconnect(window, NATIVE_WINDOW_API_EGL);
         }
         return EGL_NO_SURFACE;
     }
     attrib_list = strippedAttribList.data();
 
-    if (cnx->angleBackend != EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE) {
+    if (!cnx->useAngle) {
         int err = native_window_set_buffers_format(window, format);
         if (err != 0) {
             ALOGE("error setting native window pixel format: %s (%d)", strerror(-err), err);
@@ -779,7 +779,7 @@
     }
 
     // EGLSurface creation failed
-    if (cnx->angleBackend != EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE) {
+    if (!cnx->useAngle) {
         native_window_set_buffers_format(window, 0);
         native_window_api_disconnect(window, NATIVE_WINDOW_API_EGL);
     }
@@ -1419,7 +1419,7 @@
         }
     }
 
-    if (s->cnx->angleBackend != EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE) {
+    if (!s->cnx->useAngle) {
         if (!sendSurfaceMetadata(s)) {
             native_window_api_disconnect(s->getNativeWindow(), NATIVE_WINDOW_API_EGL);
             return setError(EGL_BAD_NATIVE_WINDOW, (EGLBoolean)EGL_FALSE);
@@ -1444,7 +1444,7 @@
         androidRect.bottom = y;
         androidRects.push_back(androidRect);
     }
-    if (s->cnx->angleBackend != EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE) {
+    if (!s->cnx->useAngle) {
         native_window_set_surface_damage(s->getNativeWindow(), androidRects.data(),
                                          androidRects.size());
     }
diff --git a/opengl/libs/EGL/egldefs.h b/opengl/libs/EGL/egldefs.h
index 7bb9b59..5fbffbd 100644
--- a/opengl/libs/EGL/egldefs.h
+++ b/opengl/libs/EGL/egldefs.h
@@ -81,11 +81,7 @@
     void*               libGles2;
 
     bool                systemDriverUnloaded;
-    bool                shouldUseAngle; // Should we attempt to load ANGLE
-    bool                angleDecided;   // Have we tried to load ANGLE
     bool                useAngle;       // Was ANGLE successfully loaded
-    EGLint              angleBackend;
-    void*               vendorEGL;
 };
 // clang-format on
 
diff --git a/opengl/tests/EGLTest/Android.bp b/opengl/tests/EGLTest/Android.bp
index 8bfe517..e3912a8 100644
--- a/opengl/tests/EGLTest/Android.bp
+++ b/opengl/tests/EGLTest/Android.bp
@@ -25,6 +25,7 @@
         "liblog",
         "libutils",
         "libnativewindow",
+        "libSurfaceFlingerProp",
     ],
 
     include_dirs: [
@@ -34,5 +35,6 @@
 
     header_libs: [
         "bionic_libc_platform_headers",
+        "libsurfaceflinger_headers",
     ],
 }
diff --git a/opengl/tests/EGLTest/EGL_test.cpp b/opengl/tests/EGLTest/EGL_test.cpp
index cca91c3..510226d 100644
--- a/opengl/tests/EGLTest/EGL_test.cpp
+++ b/opengl/tests/EGLTest/EGL_test.cpp
@@ -16,6 +16,7 @@
 
 #include <gtest/gtest.h>
 
+#include <SurfaceFlingerProperties.h>
 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 
 #include <configstore/Utils.h>
@@ -52,11 +53,9 @@
 
 #define METADATA_SCALE(x) (static_cast<EGLint>(x * EGL_METADATA_SCALING_EXT))
 
-static bool hasWideColorDisplay =
-        getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::hasWideColorDisplay>(false);
+static bool hasWideColorDisplay = android::sysprop::has_wide_color_display(false);
 
-static bool hasHdrDisplay =
-        getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::hasHDRDisplay>(false);
+static bool hasHdrDisplay = android::sysprop::has_HDR_display(false);
 
 class EGLTest : public ::testing::Test {
 public:
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index 0982ea7..baf2f2b 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -352,18 +352,16 @@
             break;
         }
     }
-    std::vector<uint8_t> data;
     const uint8_t* start = reinterpret_cast<const uint8_t*>(&event);
-    data.assign(start, start + size);
-    return sign(data);
+    return sign(start, size);
 }
 
-std::array<uint8_t, 32> HmacKeyManager::sign(const std::vector<uint8_t>& data) const {
+std::array<uint8_t, 32> HmacKeyManager::sign(const uint8_t* data, size_t size) const {
     // SHA256 always generates 32-bytes result
     std::array<uint8_t, 32> hash;
     unsigned int hashLen = 0;
-    uint8_t* result = HMAC(EVP_sha256(), mHmacKey.data(), mHmacKey.size(), data.data(), data.size(),
-                           hash.data(), &hashLen);
+    uint8_t* result =
+            HMAC(EVP_sha256(), mHmacKey.data(), mHmacKey.size(), data, size, hash.data(), &hashLen);
     if (result == nullptr) {
         ALOGE("Could not sign the data using HMAC");
         return INVALID_HMAC;
@@ -2482,11 +2480,8 @@
         EventEntry* eventEntry = dispatchEntry->eventEntry;
         switch (eventEntry->type) {
             case EventEntry::Type::KEY: {
-                KeyEntry* keyEntry = static_cast<KeyEntry*>(eventEntry);
-                VerifiedKeyEvent verifiedEvent = verifiedKeyEventFromKeyEntry(*keyEntry);
-                verifiedEvent.flags = dispatchEntry->resolvedFlags & VERIFIED_KEY_EVENT_FLAGS;
-                verifiedEvent.action = dispatchEntry->resolvedAction;
-                std::array<uint8_t, 32> hmac = mHmacKeyManager.sign(verifiedEvent);
+                const KeyEntry* keyEntry = static_cast<KeyEntry*>(eventEntry);
+                std::array<uint8_t, 32> hmac = getSignature(*keyEntry, *dispatchEntry);
 
                 // Publish the key event.
                 status =
@@ -2538,12 +2533,8 @@
                         usingCoords = scaledCoords;
                     }
                 }
-                VerifiedMotionEvent verifiedEvent =
-                        verifiedMotionEventFromMotionEntry(*motionEntry);
-                verifiedEvent.actionMasked =
-                        dispatchEntry->resolvedAction & AMOTION_EVENT_ACTION_MASK;
-                verifiedEvent.flags = dispatchEntry->resolvedFlags & VERIFIED_MOTION_EVENT_FLAGS;
-                std::array<uint8_t, 32> hmac = mHmacKeyManager.sign(verifiedEvent);
+
+                std::array<uint8_t, 32> hmac = getSignature(*motionEntry, *dispatchEntry);
 
                 // Publish the motion event.
                 status = connection->inputPublisher
@@ -2623,6 +2614,28 @@
     }
 }
 
+const std::array<uint8_t, 32> InputDispatcher::getSignature(
+        const MotionEntry& motionEntry, const DispatchEntry& dispatchEntry) const {
+    int32_t actionMasked = dispatchEntry.resolvedAction & AMOTION_EVENT_ACTION_MASK;
+    if ((actionMasked == AMOTION_EVENT_ACTION_UP) || (actionMasked == AMOTION_EVENT_ACTION_DOWN)) {
+        // Only sign events up and down events as the purely move events
+        // are tied to their up/down counterparts so signing would be redundant.
+        VerifiedMotionEvent verifiedEvent = verifiedMotionEventFromMotionEntry(motionEntry);
+        verifiedEvent.actionMasked = actionMasked;
+        verifiedEvent.flags = dispatchEntry.resolvedFlags & VERIFIED_MOTION_EVENT_FLAGS;
+        return mHmacKeyManager.sign(verifiedEvent);
+    }
+    return INVALID_HMAC;
+}
+
+const std::array<uint8_t, 32> InputDispatcher::getSignature(
+        const KeyEntry& keyEntry, const DispatchEntry& dispatchEntry) const {
+    VerifiedKeyEvent verifiedEvent = verifiedKeyEventFromKeyEntry(keyEntry);
+    verifiedEvent.flags = dispatchEntry.resolvedFlags & VERIFIED_KEY_EVENT_FLAGS;
+    verifiedEvent.action = dispatchEntry.resolvedAction;
+    return mHmacKeyManager.sign(verifiedEvent);
+}
+
 void InputDispatcher::finishDispatchCycleLocked(nsecs_t currentTime,
                                                 const sp<Connection>& connection, uint32_t seq,
                                                 bool handled) {
@@ -3311,9 +3324,8 @@
             KeyEntry* injectedEntry =
                     new KeyEntry(incomingKey.getId(), incomingKey.getEventTime(),
                                  VIRTUAL_KEYBOARD_ID, incomingKey.getSource(),
-                                 incomingKey.getDisplayId(), policyFlags, action, flags,
-                                 incomingKey.getKeyCode(), incomingKey.getScanCode(),
-                                 incomingKey.getMetaState(), incomingKey.getRepeatCount(),
+                                 incomingKey.getDisplayId(), policyFlags, action, flags, keyCode,
+                                 incomingKey.getScanCode(), metaState, incomingKey.getRepeatCount(),
                                  incomingKey.getDownTime());
             injectedEntries.push(injectedEntry);
             break;
@@ -3629,8 +3641,8 @@
             if (canReceiveInput && !noInputChannel) {
                 ALOGV("Window handle %s has no registered input channel",
                       handle->getName().c_str());
+                continue;
             }
-            continue;
         }
 
         if (info->displayId != displayId) {
diff --git a/services/inputflinger/dispatcher/InputDispatcher.h b/services/inputflinger/dispatcher/InputDispatcher.h
index cbba7e1..2b9cbce 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.h
+++ b/services/inputflinger/dispatcher/InputDispatcher.h
@@ -62,7 +62,7 @@
     std::array<uint8_t, 32> sign(const VerifiedInputEvent& event) const;
 
 private:
-    std::array<uint8_t, 32> sign(const std::vector<uint8_t>& data) const;
+    std::array<uint8_t, 32> sign(const uint8_t* data, size_t size) const;
     const std::array<uint8_t, 128> mHmacKey;
 };
 
@@ -219,7 +219,11 @@
     // the pointer stream in order to claim it for a system gesture.
     std::unordered_map<int32_t, std::vector<Monitor>> mGestureMonitorsByDisplay GUARDED_BY(mLock);
 
-    HmacKeyManager mHmacKeyManager;
+    const HmacKeyManager mHmacKeyManager;
+    const std::array<uint8_t, 32> getSignature(const MotionEntry& motionEntry,
+                                               const DispatchEntry& dispatchEntry) const;
+    const std::array<uint8_t, 32> getSignature(const KeyEntry& keyEntry,
+                                               const DispatchEntry& dispatchEntry) const;
 
     // Event injection and synchronization.
     std::condition_variable mInjectionResultAvailable;
diff --git a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
index d77c8c8..43bd9f1 100644
--- a/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/MultiTouchInputMapper.cpp
@@ -255,6 +255,7 @@
                       getDeviceName().c_str());
                 cancelTouch(when);
             }
+            continue;
         }
 
         if (outCount >= MAX_POINTERS) {
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 96d86b6..109edfe 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -1748,7 +1748,8 @@
 
     virtual void SetUp() override {
         mFakePolicy = new FakeInputReaderPolicy();
-        mTestListener = new TestInputListener(50ms);
+        mTestListener = new TestInputListener(2000ms /*eventHappenedTimeout*/,
+                                              30ms /*eventDidNotHappenTimeout*/);
 
         mReader = new InputReader(std::make_shared<EventHub>(), mFakePolicy, mTestListener);
         ASSERT_EQ(mReader->start(), OK);
@@ -7081,6 +7082,76 @@
     ASSERT_EQ(AMOTION_EVENT_TOOL_TYPE_FINGER, motionArgs.pointerProperties[0].toolType);
 }
 
+/**
+ * Test multi-touch should be canceled when received the MT_TOOL_PALM event from some finger,
+ * and could be allowed again after all non-MT_TOOL_PALM is release and the new point is
+ * MT_TOOL_FINGER.
+ */
+TEST_F(MultiTouchInputMapperTest, Process_ShouldHandlePalmToolType2) {
+    addConfigurationProperty("touch.deviceType", "touchScreen");
+    prepareDisplay(DISPLAY_ORIENTATION_0);
+    prepareAxes(POSITION | ID | SLOT | TOOL_TYPE);
+    MultiTouchInputMapper& mapper = addMapperAndConfigure<MultiTouchInputMapper>();
+
+    NotifyMotionArgs motionArgs;
+
+    // default tool type is finger
+    constexpr int32_t x1 = 100, y1 = 200, x2 = 120, y2 = 220, x3 = 140, y3 = 240;
+    processId(mapper, 1);
+    processPosition(mapper, x1, y1);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
+    ASSERT_EQ(AMOTION_EVENT_ACTION_DOWN, motionArgs.action);
+    ASSERT_EQ(AMOTION_EVENT_TOOL_TYPE_FINGER, motionArgs.pointerProperties[0].toolType);
+
+    // Second finger down.
+    processSlot(mapper, 1);
+    processPosition(mapper, x2, y2);
+    processId(mapper, 2);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
+    ASSERT_EQ(AMOTION_EVENT_ACTION_POINTER_DOWN | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
+              motionArgs.action);
+    ASSERT_EQ(AMOTION_EVENT_TOOL_TYPE_FINGER, motionArgs.pointerProperties[0].toolType);
+
+    // If the tool type of the first pointer changes to MT_TOOL_PALM,
+    // the entire gesture should be aborted, so we expect to receive ACTION_CANCEL.
+    processSlot(mapper, 0);
+    processId(mapper, 1);
+    processToolType(mapper, MT_TOOL_PALM);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
+    ASSERT_EQ(AMOTION_EVENT_ACTION_CANCEL, motionArgs.action);
+
+    // Ignore the following MOVE and UP events if had detect a palm event.
+    processSlot(mapper, 1);
+    processId(mapper, 2);
+    processPosition(mapper, x3, y3);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasNotCalled());
+
+    // second finger up.
+    processId(mapper, -1);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasNotCalled());
+
+    // first finger move, but still in palm
+    processSlot(mapper, 0);
+    processId(mapper, 1);
+    processPosition(mapper, x1 - 1, y1 - 1);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasNotCalled());
+
+    // second finger down, expect as new finger down.
+    processSlot(mapper, 1);
+    processId(mapper, 2);
+    processPosition(mapper, x2, y2);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
+    ASSERT_EQ(AMOTION_EVENT_ACTION_DOWN, motionArgs.action);
+    ASSERT_EQ(AMOTION_EVENT_TOOL_TYPE_FINGER, motionArgs.pointerProperties[0].toolType);
+}
+
 // --- MultiTouchInputMapperTest_ExternalDevice ---
 
 class MultiTouchInputMapperTest_ExternalDevice : public MultiTouchInputMapperTest {
diff --git a/services/inputflinger/tests/TestInputListener.cpp b/services/inputflinger/tests/TestInputListener.cpp
index 86ff3b1..9bff166 100644
--- a/services/inputflinger/tests/TestInputListener.cpp
+++ b/services/inputflinger/tests/TestInputListener.cpp
@@ -23,7 +23,10 @@
 
 // --- TestInputListener ---
 
-TestInputListener::TestInputListener(const std::chrono::milliseconds timeout) : mTimeout(timeout) {}
+TestInputListener::TestInputListener(std::chrono::milliseconds eventHappenedTimeout,
+                                     std::chrono::milliseconds eventDidNotHappenTimeout)
+      : mEventHappenedTimeout(eventHappenedTimeout),
+        mEventDidNotHappenTimeout(eventDidNotHappenTimeout) {}
 
 TestInputListener::~TestInputListener() { }
 
@@ -86,9 +89,9 @@
 
     std::vector<NotifyArgsType>& queue = std::get<std::vector<NotifyArgsType>>(mQueues);
     if (queue.empty()) {
-        const bool eventReceived = mCondition.wait_for(lock, mTimeout, [&queue]() REQUIRES(mLock) {
-            return !queue.empty();
-        });
+        const bool eventReceived =
+                mCondition.wait_for(lock, mEventHappenedTimeout,
+                                    [&queue]() REQUIRES(mLock) { return !queue.empty(); });
         if (!eventReceived) {
             FAIL() << "Timed out waiting for event: " << message.c_str();
         }
@@ -105,9 +108,9 @@
     base::ScopedLockAssertion assumeLocked(mLock);
 
     std::vector<NotifyArgsType>& queue = std::get<std::vector<NotifyArgsType>>(mQueues);
-    const bool eventReceived = mCondition.wait_for(lock, mTimeout, [&queue]() REQUIRES(mLock) {
-        return !queue.empty();
-    });
+    const bool eventReceived =
+            mCondition.wait_for(lock, mEventDidNotHappenTimeout,
+                                [&queue]() REQUIRES(mLock) { return !queue.empty(); });
     if (eventReceived) {
         FAIL() << "Unexpected event: " << message.c_str();
     }
diff --git a/services/inputflinger/tests/TestInputListener.h b/services/inputflinger/tests/TestInputListener.h
index 4262f5a..d50c6bc 100644
--- a/services/inputflinger/tests/TestInputListener.h
+++ b/services/inputflinger/tests/TestInputListener.h
@@ -32,7 +32,8 @@
     virtual ~TestInputListener();
 
 public:
-    TestInputListener(const std::chrono::milliseconds timeout = 5ms);
+    TestInputListener(std::chrono::milliseconds eventHappenedTimeout = 0ms,
+                      std::chrono::milliseconds eventDidNotHappenTimeout = 0ms);
 
     void assertNotifyConfigurationChangedWasCalled(
             NotifyConfigurationChangedArgs* outEventArgs = nullptr);
@@ -75,7 +76,8 @@
 
     std::mutex mLock;
     std::condition_variable mCondition;
-    const std::chrono::milliseconds mTimeout;
+    const std::chrono::milliseconds mEventHappenedTimeout;
+    const std::chrono::milliseconds mEventDidNotHappenTimeout;
 
     std::tuple<std::vector<NotifyConfigurationChangedArgs>, //
                std::vector<NotifyDeviceResetArgs>,          //
diff --git a/services/sensorservice/SensorDevice.cpp b/services/sensorservice/SensorDevice.cpp
index 3b68e0e..45e67f7 100644
--- a/services/sensorservice/SensorDevice.cpp
+++ b/services/sensorservice/SensorDevice.cpp
@@ -20,7 +20,6 @@
 #include "android/hardware/sensors/2.1/ISensorsCallback.h"
 #include "android/hardware/sensors/2.1/types.h"
 #include "convertV2_1.h"
-#include "SensorService.h"
 
 #include <android-base/logging.h>
 #include <android/util/ProtoOutputStream.h>
@@ -30,6 +29,7 @@
 #include <utils/Errors.h>
 #include <utils/Singleton.h>
 
+#include <cstddef>
 #include <chrono>
 #include <cinttypes>
 #include <thread>
@@ -143,6 +143,25 @@
                 for (size_t i=0 ; i < count; i++) {
                     sensor_t sensor;
                     convertToSensor(convertToOldSensorInfo(list[i]), &sensor);
+
+                    if (sensor.type < static_cast<int>(SensorType::DEVICE_PRIVATE_BASE)) {
+                        if(sensor.resolution == 0) {
+                            // Don't crash here or the device will go into a crashloop.
+                            ALOGW("%s must have a non-zero resolution", sensor.name);
+                            // For simple algos, map their resolution to 1 if it's not specified
+                            sensor.resolution =
+                                    SensorDeviceUtils::defaultResolutionForType(sensor.type);
+                        }
+
+                        double promotedResolution = sensor.resolution;
+                        double promotedMaxRange = sensor.maxRange;
+                        if (fmod(promotedMaxRange, promotedResolution) != 0) {
+                            ALOGW("%s's max range %f is not a multiple of the resolution %f",
+                                    sensor.name, sensor.maxRange, sensor.resolution);
+                            SensorDeviceUtils::quantizeValue(&sensor.maxRange, promotedResolution);
+                        }
+                    }
+
                     // Sanity check and clamp power if it is 0 (or close)
                     if (sensor.power < minPowerMa) {
                         ALOGI("Reported power %f not deemed sane, clamping to %f",
@@ -403,8 +422,8 @@
     if (mSensors == nullptr) return "HAL not initialized\n";
 
     String8 result;
-    result.appendFormat("Total %zu h/w sensors, %zu running:\n",
-                        mSensorList.size(), mActivationCount.size());
+    result.appendFormat("Total %zu h/w sensors, %zu running %zu disabled clients:\n",
+                        mSensorList.size(), mActivationCount.size(), mDisabledClients.size());
 
     Mutex::Autolock _l(mLock);
     for (const auto & s : mSensorList) {
@@ -417,16 +436,18 @@
         result.append("sampling_period(ms) = {");
         for (size_t j = 0; j < info.batchParams.size(); j++) {
             const BatchParams& params = info.batchParams[j];
-            result.appendFormat("%.1f%s", params.mTSample / 1e6f,
-                j < info.batchParams.size() - 1 ? ", " : "");
+            result.appendFormat("%.1f%s%s", params.mTSample / 1e6f,
+                isClientDisabledLocked(info.batchParams.keyAt(j)) ? "(disabled)" : "",
+                (j < info.batchParams.size() - 1) ? ", " : "");
         }
         result.appendFormat("}, selected = %.2f ms; ", info.bestBatchParams.mTSample / 1e6f);
 
         result.append("batching_period(ms) = {");
         for (size_t j = 0; j < info.batchParams.size(); j++) {
             const BatchParams& params = info.batchParams[j];
-            result.appendFormat("%.1f%s", params.mTBatch / 1e6f,
-                    j < info.batchParams.size() - 1 ? ", " : "");
+            result.appendFormat("%.1f%s%s", params.mTBatch / 1e6f,
+                    isClientDisabledLocked(info.batchParams.keyAt(j)) ? "(disabled)" : "",
+                    (j < info.batchParams.size() - 1) ? ", " : "");
         }
         result.appendFormat("}, selected = %.2f ms\n", info.bestBatchParams.mTBatch / 1e6f);
     }
@@ -508,7 +529,7 @@
                     const auto &events,
                     const auto &dynamicSensorsAdded) {
                     if (result == Result::OK) {
-                        convertToSensorEvents(convertToNewEvents(events),
+                        convertToSensorEventsAndQuantize(convertToNewEvents(events),
                                 convertToNewSensorInfos(dynamicSensorsAdded), buffer);
                         err = (ssize_t)events.size();
                     } else {
@@ -571,6 +592,8 @@
 
             for (size_t i = 0; i < eventsToRead; i++) {
                 convertToSensorEvent(mEventBuffer[i], &buffer[i]);
+                android::SensorDeviceUtils::quantizeSensorEventValues(&buffer[i],
+                        getResolutionForSensor(buffer[i].sensor));
             }
             eventsRead = eventsToRead;
         } else {
@@ -641,7 +664,7 @@
 }
 
 status_t SensorDevice::activateLocked(void* ident, int handle, int enabled) {
-    bool actuateHardware = false;
+    bool activateHardware = false;
 
     status_t err(NO_ERROR);
 
@@ -667,7 +690,7 @@
 
         if (info.batchParams.indexOfKey(ident) >= 0) {
             if (info.numActiveClients() > 0 && !info.isActive) {
-                actuateHardware = true;
+                activateHardware = true;
             }
         } else {
             // Log error. Every activate call should be preceded by a batch() call.
@@ -687,7 +710,7 @@
         if (info.removeBatchParamsForIdent(ident) >= 0) {
             if (info.numActiveClients() == 0) {
                 // This is the last connection, we need to de-activate the underlying h/w sensor.
-                actuateHardware = true;
+                activateHardware = true;
             } else {
                 // Call batch for this sensor with the previously calculated best effort
                 // batch_rate and timeout. One of the apps has unregistered for sensor
@@ -707,12 +730,8 @@
         }
     }
 
-    if (actuateHardware) {
-        ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w activate handle=%d enabled=%d", handle,
-                 enabled);
-        err = checkReturnAndGetStatus(mSensors->activate(handle, enabled));
-        ALOGE_IF(err, "Error %s sensor %d (%s)", enabled ? "activating" : "disabling", handle,
-                 strerror(-err));
+    if (activateHardware) {
+        err = doActivateHardwareLocked(handle, enabled);
 
         if (err != NO_ERROR && enabled) {
             // Failure when enabling the sensor. Clean up on failure.
@@ -728,6 +747,15 @@
     return err;
 }
 
+status_t SensorDevice::doActivateHardwareLocked(int handle, bool enabled) {
+    ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w activate handle=%d enabled=%d", handle,
+             enabled);
+    status_t err = checkReturnAndGetStatus(mSensors->activate(handle, enabled));
+    ALOGE_IF(err, "Error %s sensor %d (%s)", enabled ? "activating" : "disabling", handle,
+             strerror(-err));
+    return err;
+}
+
 status_t SensorDevice::batch(
         void* ident,
         int handle,
@@ -768,6 +796,18 @@
         info.setBatchParamsForIdent(ident, flags, samplingPeriodNs, maxBatchReportLatencyNs);
     }
 
+    status_t err =  updateBatchParamsLocked(handle, info);
+    if (err != NO_ERROR) {
+        ALOGE("sensor batch failed %p 0x%08x %" PRId64 " %" PRId64 " err=%s",
+              mSensors.get(), handle, info.bestBatchParams.mTSample,
+              info.bestBatchParams.mTBatch, strerror(-err));
+        info.removeBatchParamsForIdent(ident);
+    }
+
+    return err;
+}
+
+status_t SensorDevice::updateBatchParamsLocked(int handle, Info &info) {
     BatchParams prevBestBatchParams = info.bestBatchParams;
     // Find the minimum of all timeouts and batch_rates for this sensor.
     info.selectBatchParams();
@@ -785,13 +825,8 @@
                  info.bestBatchParams.mTSample, info.bestBatchParams.mTBatch);
         err = checkReturnAndGetStatus(mSensors->batch(
                 handle, info.bestBatchParams.mTSample, info.bestBatchParams.mTBatch));
-        if (err != NO_ERROR) {
-            ALOGE("sensor batch failed %p 0x%08x %" PRId64 " %" PRId64 " err=%s",
-                  mSensors.get(), handle, info.bestBatchParams.mTSample,
-                  info.bestBatchParams.mTBatch, strerror(-err));
-            info.removeBatchParamsForIdent(ident);
-        }
     }
+
     return err;
 }
 
@@ -811,13 +846,61 @@
     return checkReturnAndGetStatus(mSensors->flush(handle));
 }
 
-bool SensorDevice::isClientDisabled(void* ident) {
+bool SensorDevice::isClientDisabled(void* ident) const {
     Mutex::Autolock _l(mLock);
     return isClientDisabledLocked(ident);
 }
 
-bool SensorDevice::isClientDisabledLocked(void* ident) {
-    return mDisabledClients.indexOf(ident) >= 0;
+bool SensorDevice::isClientDisabledLocked(void* ident) const {
+    return mDisabledClients.count(ident) > 0;
+}
+
+std::vector<void *> SensorDevice::getDisabledClientsLocked() const {
+    std::vector<void *> vec;
+    for (const auto& it : mDisabledClients) {
+        vec.push_back(it.first);
+    }
+
+    return vec;
+}
+
+void SensorDevice::addDisabledReasonForIdentLocked(void* ident, DisabledReason reason) {
+    mDisabledClients[ident] |= 1 << reason;
+}
+
+void SensorDevice::removeDisabledReasonForIdentLocked(void* ident, DisabledReason reason) {
+    if (isClientDisabledLocked(ident)) {
+        mDisabledClients[ident] &= ~(1 << reason);
+        if (mDisabledClients[ident] == 0) {
+            mDisabledClients.erase(ident);
+        }
+    }
+}
+
+void SensorDevice::setUidStateForConnection(void* ident, SensorService::UidState state) {
+    Mutex::Autolock _l(mLock);
+    if (state == SensorService::UID_STATE_ACTIVE) {
+        removeDisabledReasonForIdentLocked(ident, DisabledReason::DISABLED_REASON_UID_IDLE);
+    } else {
+        addDisabledReasonForIdentLocked(ident, DisabledReason::DISABLED_REASON_UID_IDLE);
+    }
+
+    for (size_t i = 0; i< mActivationCount.size(); ++i) {
+        int handle = mActivationCount.keyAt(i);
+        Info& info = mActivationCount.editValueAt(i);
+
+        if (info.hasBatchParamsForIdent(ident)) {
+            if (updateBatchParamsLocked(handle, info) != NO_ERROR) {
+                bool enable = info.numActiveClients() == 0 && info.isActive;
+                bool disable = info.numActiveClients() > 0 && !info.isActive;
+
+                if ((enable || disable) &&
+                    doActivateHardwareLocked(handle, enable) == NO_ERROR) {
+                    info.isActive = enable;
+                }
+            }
+        }
+    }
 }
 
 bool SensorDevice::isSensorActive(int handle) const {
@@ -832,8 +915,12 @@
 void SensorDevice::enableAllSensors() {
     if (mSensors == nullptr) return;
     Mutex::Autolock _l(mLock);
-    mDisabledClients.clear();
-    ALOGI("cleared mDisabledClients");
+
+    for (void *client : getDisabledClientsLocked()) {
+        removeDisabledReasonForIdentLocked(
+            client, DisabledReason::DISABLED_REASON_SERVICE_RESTRICTED);
+    }
+
     for (size_t i = 0; i< mActivationCount.size(); ++i) {
         Info& info = mActivationCount.editValueAt(i);
         if (info.batchParams.isEmpty()) continue;
@@ -873,7 +960,8 @@
            // Add all the connections that were registered for this sensor to the disabled
            // clients list.
            for (size_t j = 0; j < info.batchParams.size(); ++j) {
-               mDisabledClients.add(info.batchParams.keyAt(j));
+               addDisabledReasonForIdentLocked(
+                   info.batchParams.keyAt(j), DisabledReason::DISABLED_REASON_SERVICE_RESTRICTED);
                ALOGI("added %p to mDisabledClients", info.batchParams.keyAt(j));
            }
 
@@ -1048,7 +1136,7 @@
 
 void SensorDevice::notifyConnectionDestroyed(void* ident) {
     Mutex::Autolock _l(mLock);
-    mDisabledClients.remove(ident);
+    mDisabledClients.erase(ident);
 }
 
 bool SensorDevice::isDirectReportSupported() const {
@@ -1077,7 +1165,7 @@
     }
 }
 
-void SensorDevice::convertToSensorEvents(
+void SensorDevice::convertToSensorEventsAndQuantize(
         const hidl_vec<Event> &src,
         const hidl_vec<SensorInfo> &dynamicSensorsAdded,
         sensors_event_t *dst) {
@@ -1088,9 +1176,26 @@
 
     for (size_t i = 0; i < src.size(); ++i) {
         V2_1::implementation::convertToSensorEvent(src[i], &dst[i]);
+        android::SensorDeviceUtils::quantizeSensorEventValues(&dst[i],
+                getResolutionForSensor(dst[i].sensor));
     }
 }
 
+float SensorDevice::getResolutionForSensor(int sensorHandle) {
+    for (size_t i = 0; i < mSensorList.size(); i++) {
+      if (sensorHandle == mSensorList[i].handle) {
+        return mSensorList[i].resolution;
+      }
+    }
+
+    auto it = mConnectedDynamicSensors.find(sensorHandle);
+    if (it != mConnectedDynamicSensors.end()) {
+      return it->second->resolution;
+    }
+
+    return 0;
+}
+
 void SensorDevice::handleHidlDeath(const std::string & detail) {
     if (!mSensors->supportsMessageQueues()) {
         // restart is the only option at present.
diff --git a/services/sensorservice/SensorDevice.h b/services/sensorservice/SensorDevice.h
index 24d03c6..5e7d3da 100644
--- a/services/sensorservice/SensorDevice.h
+++ b/services/sensorservice/SensorDevice.h
@@ -18,6 +18,7 @@
 #define ANDROID_SENSOR_DEVICE_H
 
 #include "SensorDeviceUtils.h"
+#include "SensorService.h"
 #include "SensorServiceUtils.h"
 #include "ISensorsWrapper.h"
 
@@ -116,6 +117,8 @@
     hardware::Return<void> onDynamicSensorsDisconnected(
             const hardware::hidl_vec<int32_t> &dynamicSensorHandlesRemoved);
 
+    void setUidStateForConnection(void* ident, SensorService::UidState state);
+
     bool isReconnecting() const {
         return mReconnecting;
     }
@@ -179,6 +182,13 @@
         // the removed ident. If index >=0, ident is present and successfully removed.
         ssize_t removeBatchParamsForIdent(void* ident);
 
+        bool hasBatchParamsForIdent(void* ident) const {
+            return batchParams.indexOfKey(ident) >= 0;
+        }
+
+        /**
+         * @return The number of active clients of this sensor.
+         */
         int numActiveClients() const;
     };
     DefaultKeyedVector<int, Info> mActivationCount;
@@ -187,8 +197,26 @@
     SensorServiceUtil::RingBuffer<HidlTransportErrorLog> mHidlTransportErrors;
     int mTotalHidlTransportErrors;
 
-    // Use this vector to determine which client is activated or deactivated.
-    SortedVector<void *> mDisabledClients;
+    /**
+     * Enums describing the reason why a client was disabled.
+     */
+    enum DisabledReason : uint8_t {
+        // UID becomes idle (e.g. app goes to background).
+        DISABLED_REASON_UID_IDLE = 0,
+
+        // Sensors are restricted for all clients.
+        DISABLED_REASON_SERVICE_RESTRICTED,
+        DISABLED_REASON_MAX,
+    };
+
+    static_assert(DisabledReason::DISABLED_REASON_MAX < sizeof(uint8_t) * CHAR_BIT);
+
+    // Use this map to determine which client is activated or deactivated.
+    std::unordered_map<void *, uint8_t> mDisabledClients;
+
+    void addDisabledReasonForIdentLocked(void* ident, DisabledReason reason);
+    void removeDisabledReasonForIdentLocked(void* ident, DisabledReason reason);
+
     SensorDevice();
     bool connectHidlService();
     void initializeSensorList();
@@ -214,6 +242,9 @@
     status_t batchLocked(void* ident, int handle, int flags, int64_t samplingPeriodNs,
                          int64_t maxBatchReportLatencyNs);
 
+    status_t updateBatchParamsLocked(int handle, Info& info);
+    status_t doActivateHardwareLocked(int handle, bool enable);
+
     void handleHidlDeath(const std::string &detail);
     template<typename T>
     void checkReturn(const Return<T>& ret) {
@@ -225,19 +256,24 @@
     //TODO(b/67425500): remove waiter after bug is resolved.
     sp<SensorDeviceUtils::HidlServiceRegistrationWaiter> mRestartWaiter;
 
-    bool isClientDisabled(void* ident);
-    bool isClientDisabledLocked(void* ident);
+    bool isClientDisabled(void* ident) const;
+    bool isClientDisabledLocked(void* ident) const;
+    std::vector<void *> getDisabledClientsLocked() const;
+
+    bool clientHasNoAccessLocked(void* ident) const;
 
     using Event = hardware::sensors::V2_1::Event;
     using SensorInfo = hardware::sensors::V2_1::SensorInfo;
 
     void convertToSensorEvent(const Event &src, sensors_event_t *dst);
 
-    void convertToSensorEvents(
+    void convertToSensorEventsAndQuantize(
             const hardware::hidl_vec<Event> &src,
             const hardware::hidl_vec<SensorInfo> &dynamicSensorsAdded,
             sensors_event_t *dst);
 
+    float getResolutionForSensor(int sensorHandle);
+
     bool mIsDirectReportSupported;
 
     typedef hardware::MessageQueue<uint32_t, hardware::kSynchronizedReadWrite> WakeLockQueue;
diff --git a/services/sensorservice/SensorDeviceUtils.cpp b/services/sensorservice/SensorDeviceUtils.cpp
index dbafffe..0dcf8c0 100644
--- a/services/sensorservice/SensorDeviceUtils.cpp
+++ b/services/sensorservice/SensorDeviceUtils.cpp
@@ -17,17 +17,101 @@
 #include "SensorDeviceUtils.h"
 
 #include <android/hardware/sensors/1.0/ISensors.h>
+#include <android/hardware/sensors/2.1/ISensors.h>
 #include <utils/Log.h>
 
 #include <chrono>
 #include <thread>
 
 using ::android::hardware::Void;
+using SensorTypeV2_1 = android::hardware::sensors::V2_1::SensorType;
 using namespace android::hardware::sensors::V1_0;
 
 namespace android {
 namespace SensorDeviceUtils {
 
+void quantizeSensorEventValues(sensors_event_t *event, float resolution) {
+    LOG_FATAL_IF(resolution == 0, "Resolution must be specified for all sensors!");
+    if (resolution == 0) {
+        return;
+    }
+
+    size_t axes = 0;
+    switch ((SensorTypeV2_1)event->type) {
+        case SensorTypeV2_1::ACCELEROMETER:
+        case SensorTypeV2_1::MAGNETIC_FIELD:
+        case SensorTypeV2_1::ORIENTATION:
+        case SensorTypeV2_1::GYROSCOPE:
+        case SensorTypeV2_1::GRAVITY:
+        case SensorTypeV2_1::LINEAR_ACCELERATION:
+        case SensorTypeV2_1::MAGNETIC_FIELD_UNCALIBRATED:
+        case SensorTypeV2_1::GYROSCOPE_UNCALIBRATED:
+        case SensorTypeV2_1::ACCELEROMETER_UNCALIBRATED:
+            axes = 3;
+            break;
+        case SensorTypeV2_1::GAME_ROTATION_VECTOR:
+            axes = 4;
+            break;
+        case SensorTypeV2_1::ROTATION_VECTOR:
+        case SensorTypeV2_1::GEOMAGNETIC_ROTATION_VECTOR:
+            axes = 5;
+            break;
+        case SensorTypeV2_1::DEVICE_ORIENTATION:
+        case SensorTypeV2_1::LIGHT:
+        case SensorTypeV2_1::PRESSURE:
+        case SensorTypeV2_1::TEMPERATURE:
+        case SensorTypeV2_1::PROXIMITY:
+        case SensorTypeV2_1::RELATIVE_HUMIDITY:
+        case SensorTypeV2_1::AMBIENT_TEMPERATURE:
+        case SensorTypeV2_1::SIGNIFICANT_MOTION:
+        case SensorTypeV2_1::STEP_DETECTOR:
+        case SensorTypeV2_1::TILT_DETECTOR:
+        case SensorTypeV2_1::WAKE_GESTURE:
+        case SensorTypeV2_1::GLANCE_GESTURE:
+        case SensorTypeV2_1::PICK_UP_GESTURE:
+        case SensorTypeV2_1::WRIST_TILT_GESTURE:
+        case SensorTypeV2_1::STATIONARY_DETECT:
+        case SensorTypeV2_1::MOTION_DETECT:
+        case SensorTypeV2_1::HEART_BEAT:
+        case SensorTypeV2_1::LOW_LATENCY_OFFBODY_DETECT:
+        case SensorTypeV2_1::HINGE_ANGLE:
+            axes = 1;
+            break;
+        case SensorTypeV2_1::POSE_6DOF:
+            axes = 15;
+            break;
+        default:
+            // No other sensors have data that needs to be rounded.
+            break;
+    }
+
+    // sensor_event_t is a union so we're able to perform the same quanitization action for most
+    // sensors by only knowing the number of axes their output data has.
+    for (size_t i = 0; i < axes; i++) {
+        quantizeValue(&event->data[i], resolution);
+    }
+}
+
+float defaultResolutionForType(int type) {
+    switch ((SensorTypeV2_1)type) {
+        case SensorTypeV2_1::SIGNIFICANT_MOTION:
+        case SensorTypeV2_1::STEP_DETECTOR:
+        case SensorTypeV2_1::STEP_COUNTER:
+        case SensorTypeV2_1::TILT_DETECTOR:
+        case SensorTypeV2_1::WAKE_GESTURE:
+        case SensorTypeV2_1::GLANCE_GESTURE:
+        case SensorTypeV2_1::PICK_UP_GESTURE:
+        case SensorTypeV2_1::WRIST_TILT_GESTURE:
+        case SensorTypeV2_1::STATIONARY_DETECT:
+        case SensorTypeV2_1::MOTION_DETECT:
+            return 1.0f;
+        default:
+            // fall through and return 0 for all other types
+            break;
+    }
+    return 0.0f;
+}
+
 HidlServiceRegistrationWaiter::HidlServiceRegistrationWaiter() {
 }
 
diff --git a/services/sensorservice/SensorDeviceUtils.h b/services/sensorservice/SensorDeviceUtils.h
index e2eb606..d7e621c 100644
--- a/services/sensorservice/SensorDeviceUtils.h
+++ b/services/sensorservice/SensorDeviceUtils.h
@@ -18,7 +18,9 @@
 #define ANDROID_SENSOR_DEVICE_UTIL
 
 #include <android/hidl/manager/1.0/IServiceNotification.h>
+#include <hardware/sensors.h>
 
+#include <cmath>
 #include <condition_variable>
 #include <thread>
 
@@ -29,6 +31,21 @@
 namespace android {
 namespace SensorDeviceUtils {
 
+// Quantizes a single value using a sensor's resolution.
+inline void quantizeValue(float *value, double resolution) {
+    // Increase the value of the sensor's nominal resolution to ensure that
+    // sensor accuracy improvements, like runtime calibration, are not masked
+    // during requantization.
+    double incRes = 0.25 * resolution;
+    *value = round(static_cast<double>(*value) / incRes) * incRes;
+}
+
+// Ensures a sensor event doesn't provide values finer grained than its sensor resolution allows.
+void quantizeSensorEventValues(sensors_event_t *event, float resolution);
+
+// Provides a default resolution for simple sensor types if one wasn't provided by the HAL.
+float defaultResolutionForType(int type);
+
 class HidlServiceRegistrationWaiter : public IServiceNotification {
 public:
 
diff --git a/services/sensorservice/SensorDirectConnection.cpp b/services/sensorservice/SensorDirectConnection.cpp
index 106efd6..e4c33da 100644
--- a/services/sensorservice/SensorDirectConnection.cpp
+++ b/services/sensorservice/SensorDirectConnection.cpp
@@ -93,6 +93,18 @@
     return nullptr;
 }
 
+void SensorService::SensorDirectConnection::onSensorAccessChanged(bool hasAccess) {
+    if (!hasAccess) {
+        stopAll(true /* backupRecord */);
+    } else {
+        recoverAll();
+    }
+}
+
+bool SensorService::SensorDirectConnection::hasSensorAccess() const {
+    return mService->hasSensorAccess(mUid, mOpPackageName);
+}
+
 status_t SensorService::SensorDirectConnection::enableDisable(
         int handle, bool enabled, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs,
         int reservedFlags) {
@@ -125,7 +137,7 @@
         return NO_ERROR;
     }
 
-    if (!mService->isOperationPermitted(mOpPackageName)) {
+    if (!hasSensorAccess()) {
         return PERMISSION_DENIED;
     }
 
@@ -169,12 +181,15 @@
 }
 
 void SensorService::SensorDirectConnection::stopAll(bool backupRecord) {
+    Mutex::Autolock _l(mConnectionLock);
+    stopAllLocked(backupRecord);
+}
 
+void SensorService::SensorDirectConnection::stopAllLocked(bool backupRecord) {
     struct sensors_direct_cfg_t config = {
         .rate_level = SENSOR_DIRECT_RATE_STOP
     };
 
-    Mutex::Autolock _l(mConnectionLock);
     SensorDevice& dev(SensorDevice::getInstance());
     for (auto &i : mActivated) {
         dev.configureDirectChannel(i.first, getHalChannelHandle(), &config);
@@ -187,21 +202,25 @@
 }
 
 void SensorService::SensorDirectConnection::recoverAll() {
-    stopAll(false);
-
     Mutex::Autolock _l(mConnectionLock);
-    SensorDevice& dev(SensorDevice::getInstance());
+    if (!mActivatedBackup.empty()) {
+        stopAllLocked(false);
 
-    // recover list of report from backup
-    mActivated = mActivatedBackup;
-    mActivatedBackup.clear();
+        SensorDevice& dev(SensorDevice::getInstance());
 
-    // re-enable them
-    for (auto &i : mActivated) {
-        struct sensors_direct_cfg_t config = {
-            .rate_level = i.second
-        };
-        dev.configureDirectChannel(i.first, getHalChannelHandle(), &config);
+        // recover list of report from backup
+        ALOG_ASSERT(mActivated.empty(),
+                    "mActivated must be empty if mActivatedBackup was non-empty");
+        mActivated = mActivatedBackup;
+        mActivatedBackup.clear();
+
+        // re-enable them
+        for (auto &i : mActivated) {
+            struct sensors_direct_cfg_t config = {
+                .rate_level = i.second
+            };
+            dev.configureDirectChannel(i.first, getHalChannelHandle(), &config);
+        }
     }
 }
 
diff --git a/services/sensorservice/SensorDirectConnection.h b/services/sensorservice/SensorDirectConnection.h
index ead08d3..4181b65 100644
--- a/services/sensorservice/SensorDirectConnection.h
+++ b/services/sensorservice/SensorDirectConnection.h
@@ -42,17 +42,14 @@
     void dump(String8& result) const;
     void dump(util::ProtoOutputStream* proto) const;
     uid_t getUid() const { return mUid; }
+    const String16& getOpPackageName() const { return mOpPackageName; }
     int32_t getHalChannelHandle() const;
     bool isEquivalent(const sensors_direct_mem_t *mem) const;
 
-    // stop all active sensor report. if backupRecord is set to false,
-    // those report can be recovered by recoverAll
-    // called by SensorService when enter restricted mode
-    void stopAll(bool backupRecord = false);
-
-    // recover sensor reports previously stopped by stopAll(true)
-    // called by SensorService when return to NORMAL mode.
-    void recoverAll();
+    // Invoked when access to sensors for this connection has changed, e.g. lost or
+    // regained due to changes in the sensor restricted/privacy mode or the
+    // app changed to idle/active status.
+    void onSensorAccessChanged(bool hasAccess);
 
 protected:
     virtual ~SensorDirectConnection();
@@ -66,6 +63,25 @@
     virtual int32_t configureChannel(int handle, int rateLevel);
     virtual void destroy();
 private:
+    bool hasSensorAccess() const;
+
+    // Stops all active sensor direct report requests.
+    //
+    // If backupRecord is true, stopped requests can be recovered
+    // by a subsequent recoverAll() call (e.g. when temporarily stopping
+    // sensors for sensor privacy/restrict mode or when an app becomes
+    // idle).
+    void stopAll(bool backupRecord = false);
+    // Same as stopAll() but with mConnectionLock held.
+    void stopAllLocked(bool backupRecord);
+
+    // Recover sensor requests previously stopped by stopAll(true).
+    // This method can be called when a sensor access resumes (e.g.
+    // sensor privacy/restrict mode lifted or app becomes active).
+    //
+    // If no requests are backed up by stopAll(), this method is no-op.
+    void recoverAll();
+
     const sp<SensorService> mService;
     const uid_t mUid;
     const sensors_direct_mem_t mMem;
diff --git a/services/sensorservice/SensorEventConnection.cpp b/services/sensorservice/SensorEventConnection.cpp
index e799372..ccf05d9 100644
--- a/services/sensorservice/SensorEventConnection.cpp
+++ b/services/sensorservice/SensorEventConnection.cpp
@@ -31,12 +31,11 @@
 
 SensorService::SensorEventConnection::SensorEventConnection(
         const sp<SensorService>& service, uid_t uid, String8 packageName, bool isDataInjectionMode,
-        const String16& opPackageName, bool hasSensorAccess)
+        const String16& opPackageName)
     : mService(service), mUid(uid), mWakeLockRefCount(0), mHasLooperCallbacks(false),
       mDead(false), mDataInjectionMode(isDataInjectionMode), mEventCache(nullptr),
       mCacheSize(0), mMaxCacheSize(0), mTimeOfLastEventDrop(0), mEventsDropped(0),
-      mPackageName(packageName), mOpPackageName(opPackageName), mDestroyed(false),
-      mHasSensorAccess(hasSensorAccess) {
+      mPackageName(packageName), mOpPackageName(opPackageName), mDestroyed(false) {
     mChannel = new BitTube(mService->mSocketBufferSize);
 #if DEBUG_CONNECTIONS
     mEventsReceived = mEventsSentFromCache = mEventsSent = 0;
@@ -431,13 +430,9 @@
     return size < 0 ? status_t(size) : status_t(NO_ERROR);
 }
 
-void SensorService::SensorEventConnection::setSensorAccess(const bool hasAccess) {
-    Mutex::Autolock _l(mConnectionLock);
-    mHasSensorAccess = hasAccess;
-}
-
 bool SensorService::SensorEventConnection::hasSensorAccess() {
-    return mHasSensorAccess && !mService->mSensorPrivacyPolicy->isSensorPrivacyEnabled();
+    return mService->isUidActive(mUid)
+        && !mService->mSensorPrivacyPolicy->isSensorPrivacyEnabled();
 }
 
 bool SensorService::SensorEventConnection::noteOpIfRequired(const sensors_event_t& event) {
diff --git a/services/sensorservice/SensorEventConnection.h b/services/sensorservice/SensorEventConnection.h
index 1ca35c0..13cee6f 100644
--- a/services/sensorservice/SensorEventConnection.h
+++ b/services/sensorservice/SensorEventConnection.h
@@ -49,8 +49,7 @@
 
 public:
     SensorEventConnection(const sp<SensorService>& service, uid_t uid, String8 packageName,
-                          bool isDataInjectionMode, const String16& opPackageName,
-                          bool hasSensorAccess);
+                          bool isDataInjectionMode, const String16& opPackageName);
 
     status_t sendEvents(sensors_event_t const* buffer, size_t count, sensors_event_t* scratch,
                         wp<const SensorEventConnection> const * mapFlushEventsToConnections = nullptr);
@@ -69,8 +68,6 @@
 
     uid_t getUid() const { return mUid; }
 
-    void setSensorAccess(const bool hasAccess);
-
 private:
     virtual ~SensorEventConnection();
     virtual void onFirstRef();
@@ -185,7 +182,6 @@
 
     mutable Mutex mDestroyLock;
     bool mDestroyed;
-    bool mHasSensorAccess;
 
     // Store a mapping of sensor handles to required AppOp for a sensor. This map only contains a
     // valid mapping for sensors that require a permission in order to reduce the lookup time.
diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index 5fdc74f..ffcd0a0 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -299,13 +299,33 @@
     }
 }
 
-void SensorService::setSensorAccess(uid_t uid, bool hasAccess) {
+void SensorService::onUidStateChanged(uid_t uid, UidState state) {
+    SensorDevice& dev(SensorDevice::getInstance());
+
     ConnectionSafeAutolock connLock = mConnectionHolder.lock(mLock);
     for (const sp<SensorEventConnection>& conn : connLock.getActiveConnections()) {
         if (conn->getUid() == uid) {
-            conn->setSensorAccess(hasAccess);
+            dev.setUidStateForConnection(conn.get(), state);
         }
     }
+
+    for (const sp<SensorDirectConnection>& conn : connLock.getDirectConnections()) {
+        if (conn->getUid() == uid) {
+            // Update sensor subscriptions if needed
+            bool hasAccess = hasSensorAccessLocked(conn->getUid(), conn->getOpPackageName());
+            conn->onSensorAccessChanged(hasAccess);
+        }
+    }
+}
+
+bool SensorService::hasSensorAccess(uid_t uid, const String16& opPackageName) {
+    Mutex::Autolock _l(mLock);
+    return hasSensorAccessLocked(uid, opPackageName);
+}
+
+bool SensorService::hasSensorAccessLocked(uid_t uid, const String16& opPackageName) {
+    return !mSensorPrivacyPolicy->isSensorPrivacyEnabled()
+        && isUidActive(uid) && !isOperationRestrictedLocked(opPackageName);
 }
 
 const Sensor& SensorService::registerSensor(SensorInterface* s, bool isDebug, bool isVirtual) {
@@ -638,8 +658,9 @@
 
 void SensorService::disableAllSensorsLocked(ConnectionSafeAutolock* connLock) {
     SensorDevice& dev(SensorDevice::getInstance());
-    for (const sp<SensorDirectConnection>& connection : connLock->getDirectConnections()) {
-        connection->stopAll(true /* backupRecord */);
+    for (const sp<SensorDirectConnection>& conn : connLock->getDirectConnections()) {
+        bool hasAccess = hasSensorAccessLocked(conn->getUid(), conn->getOpPackageName());
+        conn->onSensorAccessChanged(hasAccess);
     }
     dev.disableAllSensors();
     // Clear all pending flush connections for all active sensors. If one of the active
@@ -666,8 +687,9 @@
     }
     SensorDevice& dev(SensorDevice::getInstance());
     dev.enableAllSensors();
-    for (const sp<SensorDirectConnection>& connection : connLock->getDirectConnections()) {
-        connection->recoverAll();
+    for (const sp<SensorDirectConnection>& conn : connLock->getDirectConnections()) {
+        bool hasAccess = hasSensorAccessLocked(conn->getUid(), conn->getOpPackageName());
+        conn->onSensorAccessChanged(hasAccess);
     }
 }
 
@@ -1234,9 +1256,8 @@
             (packageName == "") ? String8::format("unknown_package_pid_%d", pid) : packageName;
     String16 connOpPackageName =
             (opPackageName == String16("")) ? String16(connPackageName) : opPackageName;
-    bool hasSensorAccess = mUidPolicy->isUidActive(uid);
     sp<SensorEventConnection> result(new SensorEventConnection(this, uid, connPackageName,
-            requestedMode == DATA_INJECTION, connOpPackageName, hasSensorAccess));
+            requestedMode == DATA_INJECTION, connOpPackageName));
     if (requestedMode == DATA_INJECTION) {
         mConnectionHolder.addEventConnectionIfNotPresent(result);
         // Add the associated file descriptor to the Looper for polling whenever there is data to
@@ -1887,13 +1908,12 @@
     return (packageName.contains(mWhiteListedPackage.string()));
 }
 
-bool SensorService::isOperationPermitted(const String16& opPackageName) {
-    Mutex::Autolock _l(mLock);
+bool SensorService::isOperationRestrictedLocked(const String16& opPackageName) {
     if (mCurrentOperatingMode == RESTRICTED) {
         String8 package(opPackageName);
-        return isWhiteListedPackage(package);
+        return !isWhiteListedPackage(package);
     }
-    return true;
+    return false;
 }
 
 void SensorService::UidPolicy::registerSelf() {
@@ -1921,7 +1941,7 @@
     }
     sp<SensorService> service = mService.promote();
     if (service != nullptr) {
-        service->setSensorAccess(uid, true);
+        service->onUidStateChanged(uid, UID_STATE_ACTIVE);
     }
 }
 
@@ -1936,7 +1956,7 @@
     if (deleted) {
         sp<SensorService> service = mService.promote();
         if (service != nullptr) {
-            service->setSensorAccess(uid, false);
+            service->onUidStateChanged(uid, UID_STATE_IDLE);
         }
     }
 }
@@ -1964,7 +1984,7 @@
     if (wasActive != isActive) {
         sp<SensorService> service = mService.promote();
         if (service != nullptr) {
-            service->setSensorAccess(uid, isActive);
+            service->onUidStateChanged(uid, isActive ? UID_STATE_ACTIVE : UID_STATE_IDLE);
         }
     }
 }
@@ -1990,6 +2010,10 @@
     return mActiveUids.find(uid) != mActiveUids.end();
 }
 
+bool SensorService::isUidActive(uid_t uid) {
+    return mUidPolicy->isUidActive(uid);
+}
+
 void SensorService::SensorPrivacyPolicy::registerSelf() {
     SensorPrivacyManager spm;
     mSensorPrivacyEnabled = spm.isSensorPrivacyEnabled();
diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index 7d17dda..3bb8421 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -75,6 +75,11 @@
     class SensorDirectConnection;
 
 public:
+    enum UidState {
+      UID_STATE_ACTIVE = 0,
+      UID_STATE_IDLE,
+    };
+
     void cleanupConnection(SensorEventConnection* connection);
     void cleanupConnection(SensorDirectConnection* c);
 
@@ -194,6 +199,8 @@
             std::unordered_map<uid_t, bool> mOverrideUids;
     };
 
+    bool isUidActive(uid_t uid);
+
     // Sensor privacy allows a user to disable access to all sensors on the device. When
     // enabled sensor privacy will prevent all apps, including active apps, from accessing
     // sensors, they will not receive trigger nor on-change events, flush event behavior
@@ -332,7 +339,11 @@
     // allowed to register for or call flush on sensors. Typically only cts test packages are
     // allowed.
     bool isWhiteListedPackage(const String8& packageName);
-    bool isOperationPermitted(const String16& opPackageName);
+
+    // Returns true if a connection with the specified opPackageName has no access to sensors
+    // in the RESTRICTED mode (i.e. the service is in RESTRICTED mode, and the package is not
+    // whitelisted). mLock must be held to invoke this method.
+    bool isOperationRestrictedLocked(const String16& opPackageName);
 
     // Reset the state of SensorService to NORMAL mode.
     status_t resetToNormalMode();
@@ -349,7 +360,13 @@
     void enableSchedFifoMode();
 
     // Sets whether the given UID can get sensor data
-    void setSensorAccess(uid_t uid, bool hasAccess);
+    void onUidStateChanged(uid_t uid, UidState state);
+
+    // Returns true if a connection with the given uid and opPackageName
+    // currently has access to sensors.
+    bool hasSensorAccess(uid_t uid, const String16& opPackageName);
+    // Same as hasSensorAccess but with mLock held.
+    bool hasSensorAccessLocked(uid_t uid, const String16& opPackageName);
 
     // Overrides the UID state as if it is idle
     status_t handleSetUidState(Vector<String16>& args, int err);
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index c6f1f7e..0182937 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -44,7 +44,6 @@
         "libGLESv1_CM",
         "libGLESv2",
         "libgui",
-        "libhardware",
         "libhidlbase",
         "liblayers_proto",
         "liblog",
@@ -287,6 +286,7 @@
     export_shared_lib_headers: [
         "android.hardware.graphics.common@1.2",
         "libhidlbase",
+        "libui",
     ],
     export_static_lib_headers: [
         "SurfaceFlingerProperties",
diff --git a/services/surfaceflinger/Barrier.h b/services/surfaceflinger/Barrier.h
deleted file mode 100644
index 97028a8..0000000
--- a/services/surfaceflinger/Barrier.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (C) 2007 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_BARRIER_H
-#define ANDROID_BARRIER_H
-
-#include <stdint.h>
-#include <condition_variable>
-#include <mutex>
-
-namespace android {
-
-class Barrier
-{
-public:
-    // Release any threads waiting at the Barrier.
-    // Provides release semantics: preceding loads and stores will be visible
-    // to other threads before they wake up.
-    void open() {
-        std::lock_guard<std::mutex> lock(mMutex);
-        mIsOpen = true;
-        mCondition.notify_all();
-    }
-
-    // Reset the Barrier, so wait() will block until open() has been called.
-    void close() {
-        std::lock_guard<std::mutex> lock(mMutex);
-        mIsOpen = false;
-    }
-
-    // Wait until the Barrier is OPEN.
-    // Provides acquire semantics: no subsequent loads or stores will occur
-    // until wait() returns.
-    void wait() const {
-        std::unique_lock<std::mutex> lock(mMutex);
-        mCondition.wait(lock, [this]() NO_THREAD_SAFETY_ANALYSIS { return mIsOpen; });
-    }
-private:
-    mutable std::mutex mMutex;
-    mutable std::condition_variable mCondition;
-    int mIsOpen GUARDED_BY(mMutex){false};
-};
-
-}; // namespace android
-
-#endif // ANDROID_BARRIER_H
diff --git a/services/surfaceflinger/BufferLayer.cpp b/services/surfaceflinger/BufferLayer.cpp
index 54cd04f..5b28384 100644
--- a/services/surfaceflinger/BufferLayer.cpp
+++ b/services/surfaceflinger/BufferLayer.cpp
@@ -497,10 +497,6 @@
         }
     }
 
-    if (recomputeVisibleRegions == true) {
-        maybeDirtyInput();
-    }
-
     return true;
 }
 
diff --git a/services/surfaceflinger/BufferLayerConsumer.cpp b/services/surfaceflinger/BufferLayerConsumer.cpp
index e50a909..648d129 100644
--- a/services/surfaceflinger/BufferLayerConsumer.cpp
+++ b/services/surfaceflinger/BufferLayerConsumer.cpp
@@ -407,8 +407,17 @@
 }
 
 Rect BufferLayerConsumer::getCurrentCropLocked() const {
+    uint32_t width = mDefaultWidth;
+    uint32_t height = mDefaultHeight;
+    // If the buffer comes with a rotated bit for 90 (or 270) degrees, switch width/height in order
+    // to scale and crop correctly.
+    if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) {
+        width = mDefaultHeight;
+        height = mDefaultWidth;
+    }
+
     return (mCurrentScalingMode == NATIVE_WINDOW_SCALING_MODE_SCALE_CROP)
-            ? GLConsumer::scaleDownCrop(mCurrentCrop, mDefaultWidth, mDefaultHeight)
+            ? GLConsumer::scaleDownCrop(mCurrentCrop, width, height)
             : mCurrentCrop;
 }
 
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
index d8ce629..8a9763b 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFECompositionState.h
@@ -33,13 +33,15 @@
 #include <ui/GraphicBuffer.h>
 #include <ui/GraphicTypes.h>
 
-#include "DisplayHardware/ComposerHal.h"
+#include "DisplayHardware/Hal.h"
 
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic pop // ignored "-Wconversion"
 
 namespace android::compositionengine {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 // More complex metadata for this layer
 struct GenericLayerMetadataEntry {
     // True if the metadata may affect the composed result.
@@ -108,7 +110,7 @@
     Region transparentRegionHint;
 
     // The blend mode for this layer
-    Hwc2::IComposerClient::BlendMode blendMode{Hwc2::IComposerClient::BlendMode::INVALID};
+    hal::BlendMode blendMode{hal::BlendMode::INVALID};
 
     // The bounds of the layer in layer local coordinates
     FloatRect geomLayerBounds;
@@ -145,7 +147,7 @@
      */
 
     // The type of composition for this layer
-    Hwc2::IComposerClient::Composition compositionType{Hwc2::IComposerClient::Composition::INVALID};
+    hal::Composition compositionType{hal::Composition::INVALID};
 
     // The buffer and related state
     sp<GraphicBuffer> buffer;
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
index a5711a3..baf5258 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/Output.h
@@ -34,11 +34,13 @@
 
 #include "DisplayHardware/DisplayIdentification.h"
 
+namespace android {
+
 namespace HWC2 {
 class Layer;
 } // namespace HWC2
 
-namespace android::compositionengine {
+namespace compositionengine {
 
 class DisplayColorProfile;
 class LayerFE;
@@ -280,4 +282,5 @@
     virtual void cacheClientCompositionRequests(uint32_t cacheSize) = 0;
 };
 
-} // namespace android::compositionengine
+} // namespace compositionengine
+} // namespace android
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h
index 007b0e8..cf77738 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/OutputLayer.h
@@ -31,12 +31,12 @@
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic pop // ignored "-Wconversion"
 
+namespace android {
+
 namespace HWC2 {
 class Layer;
 } // namespace HWC2
 
-namespace android {
-
 namespace compositionengine {
 
 class CompositionEngine;
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
index b0a9bc9..75394fa 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
@@ -36,12 +36,12 @@
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic pop // ignored "-Wconversion"
 
+namespace android {
+
 namespace HWC2 {
 class Layer;
 } // namespace HWC2
 
-namespace android {
-
 class HWComposer;
 
 namespace compositionengine::impl {
diff --git a/services/surfaceflinger/CompositionEngine/src/Display.cpp b/services/surfaceflinger/CompositionEngine/src/Display.cpp
index 308ec5a..ab26939 100644
--- a/services/surfaceflinger/CompositionEngine/src/Display.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Display.cpp
@@ -269,8 +269,8 @@
 
 bool Display::getSkipColorTransform() const {
     const auto& hwc = getCompositionEngine().getHwComposer();
-    return mId ? hwc.hasDisplayCapability(*mId, HWC2::DisplayCapability::SkipClientColorTransform)
-               : hwc.hasCapability(HWC2::Capability::SkipClientColorTransform);
+    return mId ? hwc.hasDisplayCapability(*mId, hal::DisplayCapability::SKIP_CLIENT_COLOR_TRANSFORM)
+               : hwc.hasCapability(hal::Capability::SKIP_CLIENT_COLOR_TRANSFORM);
 }
 
 bool Display::anyLayersRequireClientComposition() const {
@@ -306,7 +306,7 @@
 void Display::applyDisplayRequests(const DisplayRequests& displayRequests) {
     auto& state = editState();
     state.flipClientTarget = (static_cast<uint32_t>(displayRequests) &
-                              static_cast<uint32_t>(HWC2::DisplayRequest::FlipClientTarget)) != 0;
+                              static_cast<uint32_t>(hal::DisplayRequest::FLIP_CLIENT_TARGET)) != 0;
     // Note: HWC2::DisplayRequest::WriteClientTargetToOutput is currently ignored.
 }
 
diff --git a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
index 3aa7956..c9a070d 100644
--- a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
@@ -344,11 +344,11 @@
 }
 
 void OutputLayer::writeOutputDependentGeometryStateToHWC(
-        HWC2::Layer* hwcLayer, Hwc2::IComposerClient::Composition requestedCompositionType) {
+        HWC2::Layer* hwcLayer, hal::Composition requestedCompositionType) {
     const auto& outputDependentState = getState();
 
     if (auto error = hwcLayer->setDisplayFrame(outputDependentState.displayFrame);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set display frame [%d, %d, %d, %d]: %s (%d)",
               getLayerFE().getDebugName(), outputDependentState.displayFrame.left,
               outputDependentState.displayFrame.top, outputDependentState.displayFrame.right,
@@ -357,7 +357,7 @@
     }
 
     if (auto error = hwcLayer->setSourceCrop(outputDependentState.sourceCrop);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set source crop [%.3f, %.3f, %.3f, %.3f]: "
               "%s (%d)",
               getLayerFE().getDebugName(), outputDependentState.sourceCrop.left,
@@ -366,18 +366,17 @@
               static_cast<int32_t>(error));
     }
 
-    if (auto error = hwcLayer->setZOrder(outputDependentState.z); error != HWC2::Error::None) {
+    if (auto error = hwcLayer->setZOrder(outputDependentState.z); error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set Z %u: %s (%d)", getLayerFE().getDebugName(),
               outputDependentState.z, to_string(error).c_str(), static_cast<int32_t>(error));
     }
 
     // Solid-color layers should always use an identity transform.
-    const auto bufferTransform =
-            requestedCompositionType != Hwc2::IComposerClient::Composition::SOLID_COLOR
+    const auto bufferTransform = requestedCompositionType != hal::Composition::SOLID_COLOR
             ? outputDependentState.bufferTransform
-            : static_cast<Hwc2::Transform>(0);
-    if (auto error = hwcLayer->setTransform(static_cast<HWC2::Transform>(bufferTransform));
-        error != HWC2::Error::None) {
+            : static_cast<hal::Transform>(0);
+    if (auto error = hwcLayer->setTransform(static_cast<hal::Transform>(bufferTransform));
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set transform %s: %s (%d)", getLayerFE().getDebugName(),
               toString(outputDependentState.bufferTransform).c_str(), to_string(error).c_str(),
               static_cast<int32_t>(error));
@@ -386,30 +385,29 @@
 
 void OutputLayer::writeOutputIndependentGeometryStateToHWC(
         HWC2::Layer* hwcLayer, const LayerFECompositionState& outputIndependentState) {
-    if (auto error = hwcLayer->setBlendMode(
-                static_cast<HWC2::BlendMode>(outputIndependentState.blendMode));
-        error != HWC2::Error::None) {
+    if (auto error = hwcLayer->setBlendMode(outputIndependentState.blendMode);
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set blend mode %s: %s (%d)", getLayerFE().getDebugName(),
               toString(outputIndependentState.blendMode).c_str(), to_string(error).c_str(),
               static_cast<int32_t>(error));
     }
 
     if (auto error = hwcLayer->setPlaneAlpha(outputIndependentState.alpha);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set plane alpha %.3f: %s (%d)", getLayerFE().getDebugName(),
               outputIndependentState.alpha, to_string(error).c_str(), static_cast<int32_t>(error));
     }
 
     if (auto error = hwcLayer->setInfo(static_cast<uint32_t>(outputIndependentState.type),
                                        static_cast<uint32_t>(outputIndependentState.appId));
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set info %s (%d)", getLayerFE().getDebugName(),
               to_string(error).c_str(), static_cast<int32_t>(error));
     }
 
     for (const auto& [name, entry] : outputIndependentState.metadata) {
         if (auto error = hwcLayer->setLayerGenericMetadata(name, entry.mandatory, entry.value);
-            error != HWC2::Error::None) {
+            error != hal::Error::NONE) {
             ALOGE("[%s] Failed to set generic metadata %s %s (%d)", getLayerFE().getDebugName(),
                   name.c_str(), to_string(error).c_str(), static_cast<int32_t>(error));
         }
@@ -422,14 +420,14 @@
     // TODO(lpique): b/121291683 outputSpaceVisibleRegion is output-dependent geometry
     // state and should not change every frame.
     if (auto error = hwcLayer->setVisibleRegion(outputDependentState.outputSpaceVisibleRegion);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set visible region: %s (%d)", getLayerFE().getDebugName(),
               to_string(error).c_str(), static_cast<int32_t>(error));
         outputDependentState.outputSpaceVisibleRegion.dump(LOG_TAG);
     }
 
     if (auto error = hwcLayer->setDataspace(outputDependentState.dataspace);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set dataspace %d: %s (%d)", getLayerFE().getDebugName(),
               outputDependentState.dataspace, to_string(error).c_str(),
               static_cast<int32_t>(error));
@@ -439,9 +437,9 @@
 void OutputLayer::writeOutputIndependentPerFrameStateToHWC(
         HWC2::Layer* hwcLayer, const LayerFECompositionState& outputIndependentState) {
     switch (auto error = hwcLayer->setColorTransform(outputIndependentState.colorTransform)) {
-        case HWC2::Error::None:
+        case hal::Error::NONE:
             break;
-        case HWC2::Error::Unsupported:
+        case hal::Error::UNSUPPORTED:
             editState().forceClientComposition = true;
             break;
         default:
@@ -450,7 +448,7 @@
     }
 
     if (auto error = hwcLayer->setSurfaceDamage(outputIndependentState.surfaceDamage);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set surface damage: %s (%d)", getLayerFE().getDebugName(),
               to_string(error).c_str(), static_cast<int32_t>(error));
         outputIndependentState.surfaceDamage.dump(LOG_TAG);
@@ -458,18 +456,18 @@
 
     // Content-specific per-frame state
     switch (outputIndependentState.compositionType) {
-        case Hwc2::IComposerClient::Composition::SOLID_COLOR:
+        case hal::Composition::SOLID_COLOR:
             // For compatibility, should be written AFTER the composition type.
             break;
-        case Hwc2::IComposerClient::Composition::SIDEBAND:
+        case hal::Composition::SIDEBAND:
             writeSidebandStateToHWC(hwcLayer, outputIndependentState);
             break;
-        case Hwc2::IComposerClient::Composition::CURSOR:
-        case Hwc2::IComposerClient::Composition::DEVICE:
+        case hal::Composition::CURSOR:
+        case hal::Composition::DEVICE:
             writeBufferStateToHWC(hwcLayer, outputIndependentState);
             break;
-        case Hwc2::IComposerClient::Composition::INVALID:
-        case Hwc2::IComposerClient::Composition::CLIENT:
+        case hal::Composition::INVALID:
+        case hal::Composition::CLIENT:
             // Ignored
             break;
     }
@@ -477,16 +475,16 @@
 
 void OutputLayer::writeSolidColorStateToHWC(HWC2::Layer* hwcLayer,
                                             const LayerFECompositionState& outputIndependentState) {
-    if (outputIndependentState.compositionType != Hwc2::IComposerClient::Composition::SOLID_COLOR) {
+    if (outputIndependentState.compositionType != hal::Composition::SOLID_COLOR) {
         return;
     }
 
-    hwc_color_t color = {static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.r)),
-                         static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.g)),
-                         static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.b)),
-                         255};
+    hal::Color color = {static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.r)),
+                        static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.g)),
+                        static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.b)),
+                        255};
 
-    if (auto error = hwcLayer->setColor(color); error != HWC2::Error::None) {
+    if (auto error = hwcLayer->setColor(color); error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set color: %s (%d)", getLayerFE().getDebugName(),
               to_string(error).c_str(), static_cast<int32_t>(error));
     }
@@ -495,7 +493,7 @@
 void OutputLayer::writeSidebandStateToHWC(HWC2::Layer* hwcLayer,
                                           const LayerFECompositionState& outputIndependentState) {
     if (auto error = hwcLayer->setSidebandStream(outputIndependentState.sidebandStream->handle());
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set sideband stream %p: %s (%d)", getLayerFE().getDebugName(),
               outputIndependentState.sidebandStream->handle(), to_string(error).c_str(),
               static_cast<int32_t>(error));
@@ -508,7 +506,7 @@
             getOutput().getDisplayColorProfile()->getSupportedPerFrameMetadata();
     if (auto error = hwcLayer->setPerFrameMetadata(supportedPerFrameMetadata,
                                                    outputIndependentState.hdrMetadata);
-        error != HWC2::Error::None && error != HWC2::Error::Unsupported) {
+        error != hal::Error::NONE && error != hal::Error::UNSUPPORTED) {
         ALOGE("[%s] Failed to set hdrMetadata: %s (%d)", getLayerFE().getDebugName(),
               to_string(error).c_str(), static_cast<int32_t>(error));
     }
@@ -522,29 +520,28 @@
                                                  &hwcBuffer);
 
     if (auto error = hwcLayer->setBuffer(hwcSlot, hwcBuffer, outputIndependentState.acquireFence);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set buffer %p: %s (%d)", getLayerFE().getDebugName(),
               outputIndependentState.buffer->handle, to_string(error).c_str(),
               static_cast<int32_t>(error));
     }
 }
 
-void OutputLayer::writeCompositionTypeToHWC(
-        HWC2::Layer* hwcLayer, Hwc2::IComposerClient::Composition requestedCompositionType) {
+void OutputLayer::writeCompositionTypeToHWC(HWC2::Layer* hwcLayer,
+                                            hal::Composition requestedCompositionType) {
     auto& outputDependentState = editState();
 
     // If we are forcing client composition, we need to tell the HWC
     if (outputDependentState.forceClientComposition) {
-        requestedCompositionType = Hwc2::IComposerClient::Composition::CLIENT;
+        requestedCompositionType = hal::Composition::CLIENT;
     }
 
     // Set the requested composition type with the HWC whenever it changes
     if (outputDependentState.hwc->hwcCompositionType != requestedCompositionType) {
         outputDependentState.hwc->hwcCompositionType = requestedCompositionType;
 
-        if (auto error = hwcLayer->setCompositionType(
-                    static_cast<HWC2::Composition>(requestedCompositionType));
-            error != HWC2::Error::None) {
+        if (auto error = hwcLayer->setCompositionType(requestedCompositionType);
+            error != hal::Error::NONE) {
             ALOGE("[%s] Failed to set composition type %s: %s (%d)", getLayerFE().getDebugName(),
                   toString(requestedCompositionType).c_str(), to_string(error).c_str(),
                   static_cast<int32_t>(error));
@@ -571,7 +568,7 @@
     Rect position = outputState.transform.transform(frame);
 
     if (auto error = hwcLayer->setCursorPosition(position.left, position.top);
-        error != HWC2::Error::None) {
+        error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set cursor position to (%d, %d): %s (%d)",
               getLayerFE().getDebugName(), position.left, position.top, to_string(error).c_str(),
               static_cast<int32_t>(error));
@@ -585,33 +582,31 @@
 
 bool OutputLayer::requiresClientComposition() const {
     const auto& state = getState();
-    return !state.hwc ||
-            state.hwc->hwcCompositionType == Hwc2::IComposerClient::Composition::CLIENT;
+    return !state.hwc || state.hwc->hwcCompositionType == hal::Composition::CLIENT;
 }
 
 bool OutputLayer::isHardwareCursor() const {
     const auto& state = getState();
-    return state.hwc && state.hwc->hwcCompositionType == Hwc2::IComposerClient::Composition::CURSOR;
+    return state.hwc && state.hwc->hwcCompositionType == hal::Composition::CURSOR;
 }
 
-void OutputLayer::detectDisallowedCompositionTypeChange(
-        Hwc2::IComposerClient::Composition from, Hwc2::IComposerClient::Composition to) const {
+void OutputLayer::detectDisallowedCompositionTypeChange(hal::Composition from,
+                                                        hal::Composition to) const {
     bool result = false;
     switch (from) {
-        case Hwc2::IComposerClient::Composition::INVALID:
-        case Hwc2::IComposerClient::Composition::CLIENT:
+        case hal::Composition::INVALID:
+        case hal::Composition::CLIENT:
             result = false;
             break;
 
-        case Hwc2::IComposerClient::Composition::DEVICE:
-        case Hwc2::IComposerClient::Composition::SOLID_COLOR:
-            result = (to == Hwc2::IComposerClient::Composition::CLIENT);
+        case hal::Composition::DEVICE:
+        case hal::Composition::SOLID_COLOR:
+            result = (to == hal::Composition::CLIENT);
             break;
 
-        case Hwc2::IComposerClient::Composition::CURSOR:
-        case Hwc2::IComposerClient::Composition::SIDEBAND:
-            result = (to == Hwc2::IComposerClient::Composition::CLIENT ||
-                      to == Hwc2::IComposerClient::Composition::DEVICE);
+        case hal::Composition::CURSOR:
+        case hal::Composition::SIDEBAND:
+            result = (to == hal::Composition::CLIENT || to == hal::Composition::DEVICE);
             break;
     }
 
@@ -622,8 +617,7 @@
     }
 }
 
-void OutputLayer::applyDeviceCompositionTypeChange(
-        Hwc2::IComposerClient::Composition compositionType) {
+void OutputLayer::applyDeviceCompositionTypeChange(hal::Composition compositionType) {
     auto& state = editState();
     LOG_FATAL_IF(!state.hwc);
     auto& hwcState = *state.hwc;
@@ -638,10 +632,10 @@
     state.clearClientTarget = false;
 }
 
-void OutputLayer::applyDeviceLayerRequest(Hwc2::IComposerClient::LayerRequest request) {
+void OutputLayer::applyDeviceLayerRequest(hal::LayerRequest request) {
     auto& state = editState();
     switch (request) {
-        case Hwc2::IComposerClient::LayerRequest::CLEAR_CLIENT_TARGET:
+        case hal::LayerRequest::CLEAR_CLIENT_TARGET:
             state.clearClientTarget = true;
             break;
 
diff --git a/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp b/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp
index f73a6f7..59889b6 100644
--- a/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/DisplayTest.cpp
@@ -40,6 +40,8 @@
 namespace android::compositionengine {
 namespace {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 using testing::_;
 using testing::DoAll;
 using testing::Eq;
@@ -645,9 +647,9 @@
 
 TEST_F(DisplayChooseCompositionStrategyTest, normalOperationWithChanges) {
     android::HWComposer::DeviceRequestedChanges changes{
-            {{nullptr, HWC2::Composition::Client}},
-            HWC2::DisplayRequest::FlipClientTarget,
-            {{nullptr, HWC2::LayerRequest::ClearClientTarget}},
+            {{nullptr, hal::Composition::CLIENT}},
+            hal::DisplayRequest::FLIP_CLIENT_TARGET,
+            {{nullptr, hal::LayerRequest::CLEAR_CLIENT_TARGET}},
     };
 
     // Since two calls are made to anyLayersRequireClientComposition with different return
@@ -682,7 +684,7 @@
 using DisplayGetSkipColorTransformTest = DisplayWithLayersTestCommon;
 
 TEST_F(DisplayGetSkipColorTransformTest, checksCapabilityIfNonHwcDisplay) {
-    EXPECT_CALL(mHwComposer, hasCapability(HWC2::Capability::SkipClientColorTransform))
+    EXPECT_CALL(mHwComposer, hasCapability(hal::Capability::SKIP_CLIENT_COLOR_TRANSFORM))
             .WillOnce(Return(true));
     auto args = getDisplayCreationArgsForNonHWCVirtualDisplay();
     auto nonHwcDisplay{impl::createDisplay(mCompositionEngine, args)};
@@ -692,7 +694,7 @@
 TEST_F(DisplayGetSkipColorTransformTest, checksDisplayCapability) {
     EXPECT_CALL(mHwComposer,
                 hasDisplayCapability(DEFAULT_DISPLAY_ID,
-                                     HWC2::DisplayCapability::SkipClientColorTransform))
+                                     hal::DisplayCapability::SKIP_CLIENT_COLOR_TRANSFORM))
             .WillOnce(Return(true));
     EXPECT_TRUE(mDisplay->getSkipColorTransform());
 }
@@ -758,9 +760,9 @@
             .Times(1);
 
     mDisplay->applyChangedTypesToLayers(impl::Display::ChangedTypes{
-            {&mLayer1.hwc2Layer, HWC2::Composition::Client},
-            {&mLayer2.hwc2Layer, HWC2::Composition::Device},
-            {&hwc2LayerUnknown, HWC2::Composition::SolidColor},
+            {&mLayer1.hwc2Layer, hal::Composition::CLIENT},
+            {&mLayer2.hwc2Layer, hal::Composition::DEVICE},
+            {&hwc2LayerUnknown, hal::Composition::SOLID_COLOR},
     });
 }
 
@@ -771,28 +773,28 @@
 using DisplayApplyDisplayRequestsTest = DisplayWithLayersTestCommon;
 
 TEST_F(DisplayApplyDisplayRequestsTest, handlesNoRequests) {
-    mDisplay->applyDisplayRequests(static_cast<HWC2::DisplayRequest>(0));
+    mDisplay->applyDisplayRequests(static_cast<hal::DisplayRequest>(0));
 
     auto& state = mDisplay->getState();
     EXPECT_FALSE(state.flipClientTarget);
 }
 
 TEST_F(DisplayApplyDisplayRequestsTest, handlesFlipClientTarget) {
-    mDisplay->applyDisplayRequests(HWC2::DisplayRequest::FlipClientTarget);
+    mDisplay->applyDisplayRequests(hal::DisplayRequest::FLIP_CLIENT_TARGET);
 
     auto& state = mDisplay->getState();
     EXPECT_TRUE(state.flipClientTarget);
 }
 
 TEST_F(DisplayApplyDisplayRequestsTest, handlesWriteClientTargetToOutput) {
-    mDisplay->applyDisplayRequests(HWC2::DisplayRequest::WriteClientTargetToOutput);
+    mDisplay->applyDisplayRequests(hal::DisplayRequest::WRITE_CLIENT_TARGET_TO_OUTPUT);
 
     auto& state = mDisplay->getState();
     EXPECT_FALSE(state.flipClientTarget);
 }
 
 TEST_F(DisplayApplyDisplayRequestsTest, handlesAllRequestFlagsSet) {
-    mDisplay->applyDisplayRequests(static_cast<HWC2::DisplayRequest>(~0));
+    mDisplay->applyDisplayRequests(static_cast<hal::DisplayRequest>(~0));
 
     auto& state = mDisplay->getState();
     EXPECT_TRUE(state.flipClientTarget);
@@ -822,8 +824,8 @@
             .Times(1);
 
     mDisplay->applyLayerRequestsToLayers(impl::Display::LayerRequests{
-            {&mLayer1.hwc2Layer, HWC2::LayerRequest::ClearClientTarget},
-            {&hwc2LayerUnknown, HWC2::LayerRequest::ClearClientTarget},
+            {&mLayer1.hwc2Layer, hal::LayerRequest::CLEAR_CLIENT_TARGET},
+            {&hwc2LayerUnknown, hal::LayerRequest::CLEAR_CLIENT_TARGET},
     });
 }
 
diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.cpp b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.cpp
index 8c10341..0baa79d 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.cpp
@@ -16,7 +16,7 @@
 
 #include "MockHWC2.h"
 
-namespace HWC2 {
+namespace android::HWC2 {
 
 // This will go away once HWC2::Layer is moved into the "backend" library
 Layer::~Layer() = default;
@@ -29,4 +29,4 @@
 Layer::~Layer() = default;
 
 } // namespace mock
-} // namespace HWC2
+} // namespace android::HWC2
diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
index be89c1a..d21b97e 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
@@ -20,7 +20,6 @@
 #include <ui/Fence.h>
 #include <ui/FloatRect.h>
 #include <ui/GraphicBuffer.h>
-
 #include <ui/Rect.h>
 #include <ui/Region.h>
 #include <ui/Transform.h>
@@ -35,31 +34,36 @@
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic pop // ignored "-Wconversion"
 
+namespace android {
 namespace HWC2 {
 namespace mock {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
+using Error = hal::Error;
+
 class Layer : public HWC2::Layer {
 public:
     Layer();
     ~Layer() override;
 
-    MOCK_CONST_METHOD0(getId, hwc2_layer_t());
+    MOCK_CONST_METHOD0(getId, hal::HWLayerId());
 
     MOCK_METHOD2(setCursorPosition, Error(int32_t, int32_t));
     MOCK_METHOD3(setBuffer,
                  Error(uint32_t, const android::sp<android::GraphicBuffer>&,
                        const android::sp<android::Fence>&));
     MOCK_METHOD1(setSurfaceDamage, Error(const android::Region&));
-    MOCK_METHOD1(setBlendMode, Error(BlendMode));
-    MOCK_METHOD1(setColor, Error(hwc_color_t));
-    MOCK_METHOD1(setCompositionType, Error(Composition));
+    MOCK_METHOD1(setBlendMode, Error(hal::BlendMode));
+    MOCK_METHOD1(setColor, Error(hal::Color));
+    MOCK_METHOD1(setCompositionType, Error(hal::Composition));
     MOCK_METHOD1(setDataspace, Error(android::ui::Dataspace));
     MOCK_METHOD2(setPerFrameMetadata, Error(const int32_t, const android::HdrMetadata&));
     MOCK_METHOD1(setDisplayFrame, Error(const android::Rect&));
     MOCK_METHOD1(setPlaneAlpha, Error(float));
     MOCK_METHOD1(setSidebandStream, Error(const native_handle_t*));
     MOCK_METHOD1(setSourceCrop, Error(const android::FloatRect&));
-    MOCK_METHOD1(setTransform, Error(Transform));
+    MOCK_METHOD1(setTransform, Error(hal::Transform));
     MOCK_METHOD1(setVisibleRegion, Error(const android::Region&));
     MOCK_METHOD1(setZOrder, Error(uint32_t));
     MOCK_METHOD2(setInfo, Error(uint32_t, uint32_t));
@@ -71,3 +75,4 @@
 
 } // namespace mock
 } // namespace HWC2
+} // namespace android
diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h b/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h
index 52bd6a1..27266b7 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWComposer.h
@@ -31,6 +31,8 @@
 namespace android {
 namespace mock {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 class HWComposer : public android::HWComposer {
 public:
     HWComposer();
@@ -38,13 +40,13 @@
 
     MOCK_METHOD2(setConfiguration, void(HWC2::ComposerCallback*, int32_t));
     MOCK_CONST_METHOD3(getDisplayIdentificationData,
-                       bool(hwc2_display_t, uint8_t*, DisplayIdentificationData*));
-    MOCK_CONST_METHOD1(hasCapability, bool(HWC2::Capability));
-    MOCK_CONST_METHOD2(hasDisplayCapability, bool(DisplayId, HWC2::DisplayCapability));
+                       bool(hal::HWDisplayId, uint8_t*, DisplayIdentificationData*));
+    MOCK_CONST_METHOD1(hasCapability, bool(hal::Capability));
+    MOCK_CONST_METHOD2(hasDisplayCapability, bool(DisplayId, hal::DisplayCapability));
 
     MOCK_METHOD3(allocateVirtualDisplay,
                  std::optional<DisplayId>(uint32_t, uint32_t, ui::PixelFormat*));
-    MOCK_METHOD2(allocatePhysicalDisplay, void(hwc2_display_t, DisplayId));
+    MOCK_METHOD2(allocatePhysicalDisplay, void(hal::HWDisplayId, DisplayId));
     MOCK_METHOD1(createLayer, HWC2::Layer*(DisplayId));
     MOCK_METHOD2(destroyLayer, void(DisplayId, HWC2::Layer*));
     MOCK_METHOD3(getDeviceCompositionChanges,
@@ -54,7 +56,7 @@
                  status_t(DisplayId, uint32_t, const sp<Fence>&, const sp<GraphicBuffer>&,
                           ui::Dataspace));
     MOCK_METHOD1(presentAndGetReleaseFences, status_t(DisplayId));
-    MOCK_METHOD2(setPowerMode, status_t(DisplayId, int));
+    MOCK_METHOD2(setPowerMode, status_t(DisplayId, hal::PowerMode));
     MOCK_METHOD2(setActiveConfig, status_t(DisplayId, size_t));
     MOCK_METHOD2(setColorTransform, status_t(DisplayId, const mat4&));
     MOCK_METHOD1(disconnectDisplay, void(DisplayId));
@@ -76,9 +78,9 @@
     MOCK_METHOD2(getDisplayBrightnessSupport, status_t(DisplayId, bool*));
 
     MOCK_METHOD2(onHotplug,
-                 std::optional<DisplayIdentificationInfo>(hwc2_display_t, HWC2::Connection));
-    MOCK_METHOD2(onVsync, bool(hwc2_display_t, int64_t));
-    MOCK_METHOD2(setVsyncEnabled, void(DisplayId, HWC2::Vsync));
+                 std::optional<DisplayIdentificationInfo>(hal::HWDisplayId, hal::Connection));
+    MOCK_METHOD2(onVsync, bool(hal::HWDisplayId, int64_t));
+    MOCK_METHOD2(setVsyncEnabled, void(DisplayId, hal::Vsync));
     MOCK_CONST_METHOD1(getRefreshTimestamp, nsecs_t(DisplayId));
     MOCK_CONST_METHOD1(isConnected, bool(DisplayId));
     MOCK_CONST_METHOD1(getConfigs,
@@ -92,21 +94,21 @@
     MOCK_CONST_METHOD1(isVsyncPeriodSwitchSupported, bool(DisplayId));
     MOCK_CONST_METHOD1(getDisplayVsyncPeriod, nsecs_t(DisplayId));
     MOCK_METHOD4(setActiveConfigWithConstraints,
-                 status_t(DisplayId, size_t, const HWC2::VsyncPeriodChangeConstraints&,
-                          HWC2::VsyncPeriodChangeTimeline*));
+                 status_t(DisplayId, size_t, const hal::VsyncPeriodChangeConstraints&,
+                          hal::VsyncPeriodChangeTimeline*));
     MOCK_METHOD2(setAutoLowLatencyMode, status_t(DisplayId, bool));
-    MOCK_METHOD2(getSupportedContentTypes, status_t(DisplayId, std::vector<HWC2::ContentType>*));
-    MOCK_METHOD2(setContentType, status_t(DisplayId, HWC2::ContentType));
+    MOCK_METHOD2(getSupportedContentTypes, status_t(DisplayId, std::vector<hal::ContentType>*));
+    MOCK_METHOD2(setContentType, status_t(DisplayId, hal::ContentType));
     MOCK_CONST_METHOD0(getSupportedLayerGenericMetadata,
                        const std::unordered_map<std::string, bool>&());
 
     MOCK_CONST_METHOD1(dump, void(std::string&));
     MOCK_CONST_METHOD0(getComposer, android::Hwc2::Composer*());
-    MOCK_CONST_METHOD1(getHwcDisplayId, std::optional<hwc2_display_t>(int32_t));
-    MOCK_CONST_METHOD0(getInternalHwcDisplayId, std::optional<hwc2_display_t>());
-    MOCK_CONST_METHOD0(getExternalHwcDisplayId, std::optional<hwc2_display_t>());
-    MOCK_CONST_METHOD1(toPhysicalDisplayId, std::optional<DisplayId>(hwc2_display_t));
-    MOCK_CONST_METHOD1(fromPhysicalDisplayId, std::optional<hwc2_display_t>(DisplayId));
+    MOCK_CONST_METHOD1(getHwcDisplayId, std::optional<hal::HWDisplayId>(int32_t));
+    MOCK_CONST_METHOD0(getInternalHwcDisplayId, std::optional<hal::HWDisplayId>());
+    MOCK_CONST_METHOD0(getExternalHwcDisplayId, std::optional<hal::HWDisplayId>());
+    MOCK_CONST_METHOD1(toPhysicalDisplayId, std::optional<DisplayId>(hal::HWDisplayId));
+    MOCK_CONST_METHOD1(fromPhysicalDisplayId, std::optional<hal::HWDisplayId>(DisplayId));
 };
 
 } // namespace mock
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
index 1b5617c..bdacb22 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
@@ -29,6 +29,8 @@
 namespace android::compositionengine {
 namespace {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 using testing::_;
 using testing::InSequence;
 using testing::Return;
@@ -613,7 +615,7 @@
  */
 
 struct OutputLayerWriteStateToHWCTest : public OutputLayerTest {
-    static constexpr HWC2::Error kError = HWC2::Error::Unsupported;
+    static constexpr hal::Error kError = hal::Error::UNSUPPORTED;
     static constexpr FloatRect kSourceCrop{11.f, 12.f, 13.f, 14.f};
     static constexpr uint32_t kZOrder = 21u;
     static constexpr Hwc2::Transform kBufferTransform = static_cast<Hwc2::Transform>(31);
@@ -686,11 +688,9 @@
         EXPECT_CALL(*mHwcLayer, setDisplayFrame(kDisplayFrame)).WillOnce(Return(kError));
         EXPECT_CALL(*mHwcLayer, setSourceCrop(kSourceCrop)).WillOnce(Return(kError));
         EXPECT_CALL(*mHwcLayer, setZOrder(kZOrder)).WillOnce(Return(kError));
-        EXPECT_CALL(*mHwcLayer, setTransform(static_cast<HWC2::Transform>(kBufferTransform)))
-                .WillOnce(Return(kError));
+        EXPECT_CALL(*mHwcLayer, setTransform(kBufferTransform)).WillOnce(Return(kError));
 
-        EXPECT_CALL(*mHwcLayer, setBlendMode(static_cast<HWC2::BlendMode>(kBlendMode)))
-                .WillOnce(Return(kError));
+        EXPECT_CALL(*mHwcLayer, setBlendMode(kBlendMode)).WillOnce(Return(kError));
         EXPECT_CALL(*mHwcLayer, setPlaneAlpha(kAlpha)).WillOnce(Return(kError));
         EXPECT_CALL(*mHwcLayer, setInfo(kType, kAppId)).WillOnce(Return(kError));
     }
@@ -701,15 +701,14 @@
         EXPECT_CALL(*mHwcLayer, setDataspace(kDataspace)).WillOnce(Return(kError));
         EXPECT_CALL(*mHwcLayer, setColorTransform(kColorTransform))
                 .WillOnce(Return(unsupported == SimulateUnsupported::ColorTransform
-                                         ? HWC2::Error::Unsupported
-                                         : HWC2::Error::None));
+                                         ? hal::Error::UNSUPPORTED
+                                         : hal::Error::NONE));
         EXPECT_CALL(*mHwcLayer, setSurfaceDamage(RegionEq(kSurfaceDamage)))
                 .WillOnce(Return(kError));
     }
 
     void expectSetCompositionTypeCall(Hwc2::IComposerClient::Composition compositionType) {
-        EXPECT_CALL(*mHwcLayer, setCompositionType(static_cast<HWC2::Composition>(compositionType)))
-                .WillOnce(Return(kError));
+        EXPECT_CALL(*mHwcLayer, setCompositionType(compositionType)).WillOnce(Return(kError));
     }
 
     void expectNoSetCompositionTypeCall() {
@@ -717,9 +716,9 @@
     }
 
     void expectSetColorCall() {
-        hwc_color_t color = {static_cast<uint8_t>(std::round(kColor.r * 255)),
-                             static_cast<uint8_t>(std::round(kColor.g * 255)),
-                             static_cast<uint8_t>(std::round(kColor.b * 255)), 255};
+        const hal::Color color = {static_cast<uint8_t>(std::round(kColor.r * 255)),
+                                  static_cast<uint8_t>(std::round(kColor.g * 255)),
+                                  static_cast<uint8_t>(std::round(kColor.b * 255)), 255};
 
         EXPECT_CALL(*mHwcLayer, setColor(ColorEq(color))).WillOnce(Return(kError));
     }
@@ -924,7 +923,7 @@
 
 struct OutputLayerWriteCursorPositionToHWCTest : public OutputLayerTest {
     static constexpr int kDefaultTransform = TR_IDENT;
-    static constexpr HWC2::Error kDefaultError = HWC2::Error::Unsupported;
+    static constexpr hal::Error kDefaultError = hal::Error::UNSUPPORTED;
 
     static const Rect kDefaultDisplayViewport;
     static const Rect kDefaultCursorFrame;
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index b81eb18..9af9cad 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -43,6 +43,8 @@
 
 namespace android {
 
+namespace hal = hardware::graphics::composer::hal;
+
 using android::base::StringAppendF;
 
 ui::Transform::RotationFlags DisplayDevice::sPrimaryDisplayRotationFlags = ui::Transform::ROT_0;
@@ -119,17 +121,17 @@
 }
 
 // ----------------------------------------------------------------------------
-void DisplayDevice::setPowerMode(int mode) {
+void DisplayDevice::setPowerMode(hal::PowerMode mode) {
     mPowerMode = mode;
-    getCompositionDisplay()->setCompositionEnabled(mPowerMode != HWC_POWER_MODE_OFF);
+    getCompositionDisplay()->setCompositionEnabled(mPowerMode != hal::PowerMode::OFF);
 }
 
-int DisplayDevice::getPowerMode()  const {
+hal::PowerMode DisplayDevice::getPowerMode() const {
     return mPowerMode;
 }
 
 bool DisplayDevice::isPoweredOn() const {
-    return mPowerMode != HWC_POWER_MODE_OFF;
+    return mPowerMode != hal::PowerMode::OFF;
 }
 
 void DisplayDevice::setActiveConfig(HwcConfigIndexType mode) {
@@ -262,7 +264,8 @@
     StringAppendF(&result, "+ %s\n", getDebugName().c_str());
 
     result.append("   ");
-    StringAppendF(&result, "powerMode=%d, ", mPowerMode);
+    StringAppendF(&result, "powerMode=%s (%d), ", to_string(mPowerMode).c_str(),
+                  static_cast<int32_t>(mPowerMode));
     StringAppendF(&result, "activeConfig=%d, ", mActiveConfig.value());
     getCompositionDisplay()->dump(result);
 }
diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index e670d78..8c86153 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -24,7 +24,6 @@
 #include <android/native_window.h>
 #include <binder/IBinder.h>
 #include <gui/LayerState.h>
-#include <hardware/hwcomposer_defs.h>
 #include <math/mat4.h>
 #include <renderengine/RenderEngine.h>
 #include <system/window.h>
@@ -39,6 +38,7 @@
 #include <utils/Timers.h>
 
 #include "DisplayHardware/DisplayIdentification.h"
+#include "DisplayHardware/Hal.h"
 #include "DisplayHardware/PowerAdvisor.h"
 #include "RenderArea.h"
 #include "Scheduler/HwcStrongTypes.h"
@@ -135,8 +135,8 @@
     /* ------------------------------------------------------------------------
      * Display power mode management.
      */
-    int getPowerMode() const;
-    void setPowerMode(int mode);
+    hardware::graphics::composer::hal::PowerMode getPowerMode() const;
+    void setPowerMode(hardware::graphics::composer::hal::PowerMode mode);
     bool isPoweredOn() const;
 
     ui::Dataspace getCompositionDataSpace() const;
@@ -172,7 +172,8 @@
 
     static ui::Transform::RotationFlags sPrimaryDisplayRotationFlags;
 
-    int mPowerMode = HWC_POWER_MODE_OFF;
+    hardware::graphics::composer::hal::PowerMode mPowerMode =
+            hardware::graphics::composer::hal::PowerMode::OFF;
     HwcConfigIndexType mActiveConfig;
 
     // TODO(b/74619554): Remove special cases for primary display.
@@ -183,7 +184,7 @@
     struct Physical {
         DisplayId id;
         DisplayConnectionType type;
-        hwc2_display_t hwcDisplayId;
+        hardware::graphics::composer::hal::HWDisplayId hwcDisplayId;
 
         bool operator==(const Physical& other) const {
             return id == other.id && type == other.type && hwcDisplayId == other.hwcDisplayId;
@@ -227,7 +228,8 @@
     HdrCapabilities hdrCapabilities;
     int32_t supportedPerFrameMetadata{0};
     std::unordered_map<ui::ColorMode, std::vector<ui::RenderIntent>> hwcColorModes;
-    int initialPowerMode{HWC_POWER_MODE_NORMAL};
+    hardware::graphics::composer::hal::PowerMode initialPowerMode{
+            hardware::graphics::composer::hal::PowerMode::ON};
     bool isPrimary{false};
 };
 
diff --git a/services/surfaceflinger/DisplayHardware/DisplayIdentification.h b/services/surfaceflinger/DisplayHardware/DisplayIdentification.h
index 9e6c549..4819d1d 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayIdentification.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayIdentification.h
@@ -26,6 +26,9 @@
 #include <ui/DeviceProductInfo.h>
 #include <ui/PhysicalDisplayId.h>
 
+#define LEGACY_DISPLAY_TYPE_PRIMARY 0
+#define LEGACY_DISPLAY_TYPE_EXTERNAL 1
+
 namespace android {
 
 struct DisplayId {
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index fc5d441..d6dbd57 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -38,6 +38,8 @@
 #include <iterator>
 #include <set>
 
+namespace android {
+
 using android::Fence;
 using android::FloatRect;
 using android::GraphicBuffer;
@@ -49,11 +51,9 @@
 
 namespace HWC2 {
 
+using namespace android::hardware::graphics::composer::hal;
+
 namespace Hwc2 = android::Hwc2;
-using android::ui::ColorMode;
-using android::ui::Dataspace;
-using android::ui::PixelFormat;
-using android::ui::RenderIntent;
 
 namespace {
 
@@ -67,7 +67,7 @@
 // Display methods
 Display::~Display() = default;
 
-Display::Config::Config(Display& display, hwc2_config_t id)
+Display::Config::Config(Display& display, HWConfigId id)
       : mDisplay(display),
         mId(id),
         mWidth(-1),
@@ -76,7 +76,7 @@
         mDpiX(-1),
         mDpiY(-1) {}
 
-Display::Config::Builder::Builder(Display& display, hwc2_config_t id)
+Display::Config::Builder::Builder(Display& display, HWConfigId id)
       : mConfig(new Config(display, id)) {}
 
 float Display::Config::Builder::getDefaultDensity() {
@@ -97,37 +97,34 @@
 namespace impl {
 
 Display::Display(android::Hwc2::Composer& composer,
-                 const std::unordered_set<Capability>& capabilities, hwc2_display_t id,
+                 const std::unordered_set<Capability>& capabilities, HWDisplayId id,
                  DisplayType type)
-      : mComposer(composer),
-        mCapabilities(capabilities),
-        mId(id),
-        mType(type) {
+      : mComposer(composer), mCapabilities(capabilities), mId(id), mType(type) {
     ALOGV("Created display %" PRIu64, id);
 }
 
 Display::~Display() {
     mLayers.clear();
 
-    Error error = Error::None;
+    Error error = Error::NONE;
     const char* msg;
     switch (mType) {
-        case DisplayType::Physical:
-            error = setVsyncEnabled(HWC2::Vsync::Disable);
+        case DisplayType::PHYSICAL:
+            error = setVsyncEnabled(HWC2::Vsync::DISABLE);
             msg = "disable VSYNC for";
             break;
 
-        case DisplayType::Virtual:
+        case DisplayType::VIRTUAL:
             error = static_cast<Error>(mComposer.destroyVirtualDisplay(mId));
             msg = "destroy virtual";
             break;
 
-        case DisplayType::Invalid: // Used in unit tests.
+        case DisplayType::INVALID: // Used in unit tests.
             break;
     }
 
-    ALOGE_IF(error != Error::None, "%s: Failed to %s display %" PRIu64 ": %s (%d)", __FUNCTION__,
-             msg, mId, to_string(error).c_str(), static_cast<int32_t>(error));
+    ALOGE_IF(error != Error::NONE, "%s: Failed to %s display %" PRIu64 ": %d", __FUNCTION__, msg,
+             mId, static_cast<int32_t>(error));
 
     ALOGV("Destroyed display %" PRIu64, mId);
 }
@@ -141,38 +138,38 @@
 
 Error Display::createLayer(HWC2::Layer** outLayer) {
     if (!outLayer) {
-        return Error::BadParameter;
+        return Error::BAD_PARAMETER;
     }
-    hwc2_layer_t layerId = 0;
+    HWLayerId layerId = 0;
     auto intError = mComposer.createLayer(mId, &layerId);
     auto error = static_cast<Error>(intError);
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
 
     auto layer = std::make_unique<impl::Layer>(mComposer, mCapabilities, mId, layerId);
     *outLayer = layer.get();
     mLayers.emplace(layerId, std::move(layer));
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::destroyLayer(HWC2::Layer* layer) {
     if (!layer) {
-        return Error::BadParameter;
+        return Error::BAD_PARAMETER;
     }
     mLayers.erase(layer->getId());
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::getActiveConfig(
         std::shared_ptr<const Display::Config>* outConfig) const
 {
     ALOGV("[%" PRIu64 "] getActiveConfig", mId);
-    hwc2_config_t configId = 0;
+    HWConfigId configId = 0;
     auto intError = mComposer.getActiveConfig(mId, &configId);
     auto error = static_cast<Error>(intError);
 
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         ALOGE("Unable to get active config for mId:[%" PRIu64 "]", mId);
         *outConfig = nullptr;
         return error;
@@ -188,7 +185,7 @@
         *outConfig = nullptr;
     }
 
-    return Error::None;
+    return Error::NONE;
 }
 
 bool Display::isVsyncPeriodSwitchSupported() const {
@@ -209,10 +206,10 @@
         *outVsyncPeriod = static_cast<nsecs_t>(vsyncPeriodNanos);
     } else {
         // Get the default vsync period
-        hwc2_config_t configId = 0;
+        HWConfigId configId = 0;
         auto intError_2_1 = mComposer.getActiveConfig(mId, &configId);
         error = static_cast<Error>(intError_2_1);
-        if (error == Error::None) {
+        if (error == Error::NONE) {
             auto config = mConfigs.at(configId);
             *outVsyncPeriod = config->getVsyncPeriod();
         }
@@ -223,11 +220,11 @@
 
 Error Display::getActiveConfigIndex(int* outIndex) const {
     ALOGV("[%" PRIu64 "] getActiveConfigIndex", mId);
-    hwc2_config_t configId = 0;
+    HWConfigId configId = 0;
     auto intError = mComposer.getActiveConfig(mId, &configId);
     auto error = static_cast<Error>(intError);
 
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         ALOGE("Unable to get active config for mId:[%" PRIu64 "]", mId);
         *outIndex = -1;
         return error;
@@ -244,7 +241,7 @@
         *outIndex = -1;
     }
 
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::getChangedCompositionTypes(std::unordered_map<HWC2::Layer*, Composition>* outTypes) {
@@ -255,7 +252,7 @@
     uint32_t numElements = layerIds.size();
     auto error = static_cast<Error>(intError);
     error = static_cast<Error>(intError);
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
 
@@ -264,7 +261,7 @@
     for (uint32_t element = 0; element < numElements; ++element) {
         auto layer = getLayerById(layerIds[element]);
         if (layer) {
-            auto type = static_cast<Composition>(types[element]);
+            auto type = types[element];
             ALOGV("getChangedCompositionTypes: adding %" PRIu64 " %s",
                     layer->getId(), to_string(type).c_str());
             outTypes->emplace(layer, type);
@@ -274,7 +271,7 @@
         }
     }
 
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::getColorModes(std::vector<ColorMode>* outModes) const
@@ -357,7 +354,7 @@
             mId, &intDisplayRequests, &layerIds, &layerRequests);
     uint32_t numElements = layerIds.size();
     auto error = static_cast<Error>(intError);
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
 
@@ -376,28 +373,28 @@
         }
     }
 
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::getConnectionType(android::DisplayConnectionType* outType) const {
-    if (mType != DisplayType::Physical) return Error::BadDisplay;
+    if (mType != DisplayType::PHYSICAL) return Error::BAD_DISPLAY;
 
     using ConnectionType = Hwc2::IComposerClient::DisplayConnectionType;
     ConnectionType connectionType;
     const auto error = static_cast<Error>(mComposer.getDisplayConnectionType(mId, &connectionType));
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
 
     *outType = connectionType == ConnectionType::INTERNAL
             ? android::DisplayConnectionType::Internal
             : android::DisplayConnectionType::External;
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::supportsDoze(bool* outSupport) const {
-    *outSupport = mDisplayCapabilities.count(DisplayCapability::Doze) > 0;
-    return Error::None;
+    *outSupport = mDisplayCapabilities.count(DisplayCapability::DOZE) > 0;
+    return Error::NONE;
 }
 
 Error Display::getHdrCapabilities(HdrCapabilities* outCapabilities) const
@@ -410,16 +407,16 @@
             &maxLuminance, &maxAverageLuminance, &minLuminance);
     auto error = static_cast<HWC2::Error>(intError);
 
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
 
     *outCapabilities = HdrCapabilities(std::move(types),
             maxLuminance, maxAverageLuminance, minLuminance);
-    return Error::None;
+    return Error::NONE;
 }
 
-Error Display::getDisplayedContentSamplingAttributes(PixelFormat* outFormat,
+Error Display::getDisplayedContentSamplingAttributes(hal::PixelFormat* outFormat,
                                                      Dataspace* outDataspace,
                                                      uint8_t* outComponentMask) const {
     auto intError = mComposer.getDisplayedContentSamplingAttributes(mId, outFormat, outDataspace,
@@ -446,7 +443,7 @@
     auto intError = mComposer.getReleaseFences(mId, &layerIds, &fenceFds);
     auto error = static_cast<Error>(intError);
     uint32_t numElements = layerIds.size();
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
 
@@ -463,12 +460,12 @@
             for (; element < numElements; ++element) {
                 close(fenceFds[element]);
             }
-            return Error::BadLayer;
+            return Error::BAD_LAYER;
         }
     }
 
     *outFences = std::move(releaseFences);
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::present(sp<Fence>* outPresentFence)
@@ -476,12 +473,12 @@
     int32_t presentFenceFd = -1;
     auto intError = mComposer.presentDisplay(mId, &presentFenceFd);
     auto error = static_cast<Error>(intError);
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
 
     *outPresentFence = new Fence(presentFenceFd);
-    return Error::None;
+    return Error::NONE;
 }
 
 Error Display::setActiveConfigWithConstraints(
@@ -492,7 +489,7 @@
         ALOGE("setActiveConfigWithConstraints received config %u for the wrong display %" PRIu64
               " (expected %" PRIu64 ")",
               config->getId(), config->getDisplayId(), mId);
-        return Error::BadConfig;
+        return Error::BAD_CONFIG;
     }
 
     if (isVsyncPeriodSwitchSupported()) {
@@ -530,7 +527,7 @@
         ALOGE("setActiveConfig received config %u for the wrong display %"
                 PRIu64 " (expected %" PRIu64 ")", config->getId(),
                 config->getDisplayId(), mId);
-        return Error::BadConfig;
+        return Error::BAD_CONFIG;
     }
     auto intError = mComposer.setActiveConfig(mId, config->getId());
     return static_cast<Error>(intError);
@@ -552,11 +549,8 @@
     return static_cast<Error>(intError);
 }
 
-Error Display::setColorTransform(const android::mat4& matrix,
-        android_color_transform_t hint)
-{
-    auto intError = mComposer.setColorTransform(mId,
-            matrix.asArray(), static_cast<Hwc2::ColorTransform>(hint));
+Error Display::setColorTransform(const android::mat4& matrix, ColorTransform hint) {
+    auto intError = mComposer.setColorTransform(mId, matrix.asArray(), hint);
     return static_cast<Error>(intError);
 }
 
@@ -575,23 +569,23 @@
     auto intMode = static_cast<Hwc2::IComposerClient::PowerMode>(mode);
     auto intError = mComposer.setPowerMode(mId, intMode);
 
-    if (mode == PowerMode::On) {
+    if (mode == PowerMode::ON) {
         std::call_once(mDisplayCapabilityQueryFlag, [this]() {
             std::vector<Hwc2::DisplayCapability> tmpCapabilities;
             auto error =
                     static_cast<Error>(mComposer.getDisplayCapabilities(mId, &tmpCapabilities));
-            if (error == Error::None) {
+            if (error == Error::NONE) {
                 for (auto capability : tmpCapabilities) {
                     mDisplayCapabilities.emplace(static_cast<DisplayCapability>(capability));
                 }
-            } else if (error == Error::Unsupported) {
-                if (mCapabilities.count(Capability::SkipClientColorTransform)) {
-                    mDisplayCapabilities.emplace(DisplayCapability::SkipClientColorTransform);
+            } else if (error == Error::UNSUPPORTED) {
+                if (mCapabilities.count(Capability::SKIP_CLIENT_COLOR_TRANSFORM)) {
+                    mDisplayCapabilities.emplace(DisplayCapability::SKIP_CLIENT_COLOR_TRANSFORM);
                 }
                 bool dozeSupport = false;
                 error = static_cast<Error>(mComposer.getDozeSupport(mId, &dozeSupport));
-                if (error == Error::None && dozeSupport) {
-                    mDisplayCapabilities.emplace(DisplayCapability::Doze);
+                if (error == Error::NONE && dozeSupport) {
+                    mDisplayCapabilities.emplace(DisplayCapability::DOZE);
                 }
             }
         });
@@ -613,7 +607,7 @@
     uint32_t numRequests = 0;
     auto intError = mComposer.validateDisplay(mId, &numTypes, &numRequests);
     auto error = static_cast<Error>(intError);
-    if (error != Error::None && error != Error::HasChanges) {
+    if (error != Error::NONE && !hasChangesError(error)) {
         return error;
     }
 
@@ -631,7 +625,7 @@
     auto intError = mComposer.presentOrValidateDisplay(
             mId, &numTypes, &numRequests, &presentFenceFd, state);
     auto error = static_cast<Error>(intError);
-    if (error != Error::None && error != Error::HasChanges) {
+    if (error != Error::NONE && !hasChangesError(error)) {
         return error;
     }
 
@@ -647,7 +641,7 @@
 }
 
 Error Display::setDisplayBrightness(float brightness) const {
-    auto intError = mComposer.setDisplayBrightness(mId, brightness);
+    const auto intError = mComposer.setDisplayBrightness(mId, brightness);
     return static_cast<Error>(intError);
 }
 
@@ -666,8 +660,7 @@
 }
 
 Error Display::setContentType(ContentType contentType) const {
-    using Hwc2_ContentType = Hwc2::IComposerClient::ContentType;
-    auto intError = mComposer.setContentType(mId, static_cast<Hwc2_ContentType>(contentType));
+    auto intError = mComposer.setContentType(mId, contentType);
     return static_cast<Error>(intError);
 }
 
@@ -676,21 +669,18 @@
 void Display::setConnected(bool connected) {
     if (!mIsConnected && connected) {
         mComposer.setClientTargetSlotCount(mId);
-        if (mType == DisplayType::Physical) {
+        if (mType == DisplayType::PHYSICAL) {
             loadConfigs();
         }
     }
     mIsConnected = connected;
 }
 
-int32_t Display::getAttribute(hwc2_config_t configId, Attribute attribute)
-{
+int32_t Display::getAttribute(HWConfigId configId, Attribute attribute) {
     int32_t value = 0;
-    auto intError = mComposer.getDisplayAttribute(mId, configId,
-            static_cast<Hwc2::IComposerClient::Attribute>(attribute),
-            &value);
+    auto intError = mComposer.getDisplayAttribute(mId, configId, attribute, &value);
     auto error = static_cast<Error>(intError);
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         ALOGE("getDisplayAttribute(%" PRIu64 ", %u, %s) failed: %s (%d)", mId,
                 configId, to_string(attribute).c_str(),
                 to_string(error).c_str(), intError);
@@ -699,17 +689,16 @@
     return value;
 }
 
-void Display::loadConfig(hwc2_config_t configId)
-{
+void Display::loadConfig(HWConfigId configId) {
     ALOGV("[%" PRIu64 "] loadConfig(%u)", mId, configId);
 
     auto config = Config::Builder(*this, configId)
-                          .setWidth(getAttribute(configId, Attribute::Width))
-                          .setHeight(getAttribute(configId, Attribute::Height))
-                          .setVsyncPeriod(getAttribute(configId, Attribute::VsyncPeriod))
-                          .setDpiX(getAttribute(configId, Attribute::DpiX))
-                          .setDpiY(getAttribute(configId, Attribute::DpiY))
-                          .setConfigGroup(getAttribute(configId, Attribute::ConfigGroup))
+                          .setWidth(getAttribute(configId, hal::Attribute::WIDTH))
+                          .setHeight(getAttribute(configId, hal::Attribute::HEIGHT))
+                          .setVsyncPeriod(getAttribute(configId, hal::Attribute::VSYNC_PERIOD))
+                          .setDpiX(getAttribute(configId, hal::Attribute::DPI_X))
+                          .setDpiY(getAttribute(configId, hal::Attribute::DPI_Y))
+                          .setConfigGroup(getAttribute(configId, hal::Attribute::CONFIG_GROUP))
                           .build();
     mConfigs.emplace(configId, std::move(config));
 }
@@ -718,10 +707,10 @@
 {
     ALOGV("[%" PRIu64 "] loadConfigs", mId);
 
-    std::vector<Hwc2::Config> configIds;
+    std::vector<HWConfigId> configIds;
     auto intError = mComposer.getDisplayConfigs(mId, &configIds);
     auto error = static_cast<Error>(intError);
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         ALOGE("[%" PRIu64 "] getDisplayConfigs [2] failed: %s (%d)", mId,
                 to_string(error).c_str(), intError);
         return;
@@ -734,7 +723,7 @@
 
 // Other Display methods
 
-HWC2::Layer* Display::getLayerById(hwc2_layer_t id) const {
+HWC2::Layer* Display::getLayerById(HWLayerId id) const {
     if (mLayers.count(id) == 0) {
         return nullptr;
     }
@@ -750,7 +739,7 @@
 namespace impl {
 
 Layer::Layer(android::Hwc2::Composer& composer, const std::unordered_set<Capability>& capabilities,
-             hwc2_display_t displayId, hwc2_layer_t layerId)
+             HWDisplayId displayId, HWLayerId layerId)
       : mComposer(composer),
         mCapabilities(capabilities),
         mDisplayId(displayId),
@@ -763,9 +752,10 @@
 {
     auto intError = mComposer.destroyLayer(mDisplayId, mId);
     auto error = static_cast<Error>(intError);
-    ALOGE_IF(error != Error::None, "destroyLayer(%" PRIu64 ", %" PRIu64 ")"
-            " failed: %s (%d)", mDisplayId, mId, to_string(error).c_str(),
-            intError);
+    ALOGE_IF(error != Error::NONE,
+             "destroyLayer(%" PRIu64 ", %" PRIu64 ")"
+             " failed: %s (%d)",
+             mDisplayId, mId, to_string(error).c_str(), intError);
 }
 
 Error Layer::setCursorPosition(int32_t x, int32_t y)
@@ -778,7 +768,7 @@
         const sp<Fence>& acquireFence)
 {
     if (buffer == nullptr && mBufferSlot == slot) {
-        return Error::None;
+        return Error::NONE;
     }
     mBufferSlot = slot;
 
@@ -792,7 +782,7 @@
 {
     if (damage.isRect() && mDamageRegion.isRect() &&
         (damage.getBounds() == mDamageRegion.getBounds())) {
-        return Error::None;
+        return Error::NONE;
     }
     mDamageRegion = damage;
 
@@ -820,30 +810,25 @@
 
 Error Layer::setBlendMode(BlendMode mode)
 {
-    auto intMode = static_cast<Hwc2::IComposerClient::BlendMode>(mode);
-    auto intError = mComposer.setLayerBlendMode(mDisplayId, mId, intMode);
+    auto intError = mComposer.setLayerBlendMode(mDisplayId, mId, mode);
     return static_cast<Error>(intError);
 }
 
-Error Layer::setColor(hwc_color_t color)
-{
-    Hwc2::IComposerClient::Color hwcColor{color.r, color.g, color.b, color.a};
-    auto intError = mComposer.setLayerColor(mDisplayId, mId, hwcColor);
+Error Layer::setColor(Color color) {
+    auto intError = mComposer.setLayerColor(mDisplayId, mId, color);
     return static_cast<Error>(intError);
 }
 
 Error Layer::setCompositionType(Composition type)
 {
-    auto intType = static_cast<Hwc2::IComposerClient::Composition>(type);
-    auto intError = mComposer.setLayerCompositionType(
-            mDisplayId, mId, intType);
+    auto intError = mComposer.setLayerCompositionType(mDisplayId, mId, type);
     return static_cast<Error>(intError);
 }
 
 Error Layer::setDataspace(Dataspace dataspace)
 {
     if (dataspace == mDataSpace) {
-        return Error::None;
+        return Error::NONE;
     }
     mDataSpace = dataspace;
     auto intError = mComposer.setLayerDataspace(mDisplayId, mId, mDataSpace);
@@ -854,7 +839,7 @@
         const android::HdrMetadata& metadata)
 {
     if (metadata == mHdrMetadata) {
-        return Error::None;
+        return Error::NONE;
     }
 
     mHdrMetadata = metadata;
@@ -901,7 +886,7 @@
                 {Hwc2::PerFrameMetadataKey::HDR10_PLUS_SEI, mHdrMetadata.hdr10plus});
         Error setMetadataBlobsError = static_cast<Error>(
                 mComposer.setLayerPerFrameMetadataBlobs(mDisplayId, mId, perFrameMetadataBlobs));
-        if (error == Error::None) {
+        if (error == Error::NONE) {
             return setMetadataBlobsError;
         }
     }
@@ -924,10 +909,10 @@
 
 Error Layer::setSidebandStream(const native_handle_t* stream)
 {
-    if (mCapabilities.count(Capability::SidebandStream) == 0) {
+    if (mCapabilities.count(Capability::SIDEBAND_STREAM) == 0) {
         ALOGE("Attempted to call setSidebandStream without checking that the "
                 "device supports sideband streams");
-        return Error::Unsupported;
+        return Error::UNSUPPORTED;
     }
     auto intError = mComposer.setLayerSidebandStream(mDisplayId, mId, stream);
     return static_cast<Error>(intError);
@@ -952,7 +937,7 @@
 {
     if (region.isRect() && mVisibleRegion.isRect() &&
         (region.getBounds() == mVisibleRegion.getBounds())) {
-        return Error::None;
+        return Error::NONE;
     }
     mVisibleRegion = region;
 
@@ -984,11 +969,11 @@
 // Composer HAL 2.3
 Error Layer::setColorTransform(const android::mat4& matrix) {
     if (matrix == mColorMatrix) {
-        return Error::None;
+        return Error::NONE;
     }
     auto intError = mComposer.setLayerColorTransform(mDisplayId, mId, matrix.asArray());
     Error error = static_cast<Error>(intError);
-    if (error != Error::None) {
+    if (error != Error::NONE) {
         return error;
     }
     mColorMatrix = matrix;
@@ -1004,6 +989,7 @@
 
 } // namespace impl
 } // namespace HWC2
+} // namespace android
 
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic pop // ignored "-Wconversion"
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 6549525..af31df8 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -17,16 +17,9 @@
 #ifndef ANDROID_SF_HWC2_H
 #define ANDROID_SF_HWC2_H
 
-#define HWC2_INCLUDE_STRINGIFICATION
-#define HWC2_USE_CPP11
-#include <hardware/hwcomposer2.h>
-#undef HWC2_INCLUDE_STRINGIFICATION
-#undef HWC2_USE_CPP11
-
 #include <gui/HdrMetadata.h>
 #include <math/mat4.h>
 #include <ui/DisplayInfo.h>
-#include <ui/GraphicTypes.h>
 #include <ui/HdrCapabilities.h>
 #include <ui/Region.h>
 #include <utils/Log.h>
@@ -39,6 +32,8 @@
 #include <unordered_set>
 #include <vector>
 
+#include "Hal.h"
+
 namespace android {
     struct DisplayedFrameStats;
     class Fence;
@@ -49,13 +44,12 @@
     }
 
     class TestableSurfaceFlinger;
-}
 
 namespace HWC2 {
 
 class Layer;
-using VsyncPeriodChangeConstraints = hwc_vsync_period_change_constraints_t;
-using VsyncPeriodChangeTimeline = hwc_vsync_period_change_timeline_t;
+
+namespace hal = android::hardware::graphics::composer::hal;
 
 // Implement this interface to receive hardware composer events.
 //
@@ -68,21 +62,20 @@
 // from different hardware composer instances.
 class ComposerCallback {
  public:
-    virtual void onHotplugReceived(int32_t sequenceId, hwc2_display_t display,
-                                   Connection connection) = 0;
-    virtual void onRefreshReceived(int32_t sequenceId,
-                                   hwc2_display_t display) = 0;
-    virtual void onVsyncReceived(int32_t sequenceId, hwc2_display_t display, int64_t timestamp,
-                                 std::optional<hwc2_vsync_period_t> vsyncPeriod) = 0;
-    virtual void onVsyncPeriodTimingChangedReceived(
-            int32_t sequenceId, hwc2_display_t display,
-            const hwc_vsync_period_change_timeline_t& updatedTimeline) = 0;
-    virtual void onSeamlessPossible(int32_t sequenceId, hwc2_display_t display) = 0;
+     virtual void onHotplugReceived(int32_t sequenceId, hal::HWDisplayId display,
+                                    hal::Connection connection) = 0;
+     virtual void onRefreshReceived(int32_t sequenceId, hal::HWDisplayId display) = 0;
+     virtual void onVsyncReceived(int32_t sequenceId, hal::HWDisplayId display, int64_t timestamp,
+                                  std::optional<hal::VsyncPeriodNanos> vsyncPeriod) = 0;
+     virtual void onVsyncPeriodTimingChangedReceived(
+             int32_t sequenceId, hal::HWDisplayId display,
+             const hal::VsyncPeriodChangeTimeline& updatedTimeline) = 0;
+     virtual void onSeamlessPossible(int32_t sequenceId, hal::HWDisplayId display) = 0;
 
-    virtual ~ComposerCallback() = default;
+     virtual ~ComposerCallback() = default;
 };
 
-// Convenience C++ class to access hwc2_device_t Display functions directly.
+// Convenience C++ class to access per display functions directly.
 class Display {
 public:
     virtual ~Display();
@@ -92,7 +85,7 @@
         class Builder
         {
         public:
-            Builder(Display& display, hwc2_config_t id);
+            Builder(Display& display, hal::HWConfigId id);
 
             std::shared_ptr<const Config> build() {
                 return std::const_pointer_cast<const Config>(
@@ -137,8 +130,8 @@
             std::shared_ptr<Config> mConfig;
         };
 
-        hwc2_display_t getDisplayId() const { return mDisplay.getId(); }
-        hwc2_config_t getId() const { return mId; }
+        hal::HWDisplayId getDisplayId() const { return mDisplay.getId(); }
+        hal::HWConfigId getId() const { return mId; }
 
         int32_t getWidth() const { return mWidth; }
         int32_t getHeight() const { return mHeight; }
@@ -148,10 +141,10 @@
         int32_t getConfigGroup() const { return mConfigGroup; }
 
     private:
-        Config(Display& display, hwc2_config_t id);
+        Config(Display& display, hal::HWConfigId id);
 
         Display& mDisplay;
-        hwc2_config_t mId;
+        hal::HWConfigId mId;
 
         int32_t mWidth;
         int32_t mHeight;
@@ -161,168 +154,173 @@
         int32_t mConfigGroup;
     };
 
-    virtual hwc2_display_t getId() const = 0;
+    virtual hal::HWDisplayId getId() const = 0;
     virtual bool isConnected() const = 0;
     virtual void setConnected(bool connected) = 0; // For use by Device only
-    virtual const std::unordered_set<DisplayCapability>& getCapabilities() const = 0;
+    virtual const std::unordered_set<hal::DisplayCapability>& getCapabilities() const = 0;
     virtual bool isVsyncPeriodSwitchSupported() const = 0;
 
-    [[clang::warn_unused_result]] virtual Error acceptChanges() = 0;
-    [[clang::warn_unused_result]] virtual Error createLayer(Layer** outLayer) = 0;
-    [[clang::warn_unused_result]] virtual Error destroyLayer(Layer* layer) = 0;
-    [[clang::warn_unused_result]] virtual Error getActiveConfig(
+    [[clang::warn_unused_result]] virtual hal::Error acceptChanges() = 0;
+    [[clang::warn_unused_result]] virtual hal::Error createLayer(Layer** outLayer) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error destroyLayer(Layer* layer) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getActiveConfig(
             std::shared_ptr<const Config>* outConfig) const = 0;
-    [[clang::warn_unused_result]] virtual Error getActiveConfigIndex(int* outIndex) const = 0;
-    [[clang::warn_unused_result]] virtual Error getChangedCompositionTypes(
-            std::unordered_map<Layer*, Composition>* outTypes) = 0;
-    [[clang::warn_unused_result]] virtual Error getColorModes(
-            std::vector<android::ui::ColorMode>* outModes) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getActiveConfigIndex(int* outIndex) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getChangedCompositionTypes(
+            std::unordered_map<Layer*, hal::Composition>* outTypes) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getColorModes(
+            std::vector<hal::ColorMode>* outModes) const = 0;
     // Returns a bitmask which contains HdrMetadata::Type::*.
     [[clang::warn_unused_result]] virtual int32_t getSupportedPerFrameMetadata() const = 0;
-    [[clang::warn_unused_result]] virtual Error getRenderIntents(
-            android::ui::ColorMode colorMode,
-            std::vector<android::ui::RenderIntent>* outRenderIntents) const = 0;
-    [[clang::warn_unused_result]] virtual Error getDataspaceSaturationMatrix(
-            android::ui::Dataspace dataspace, android::mat4* outMatrix) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getRenderIntents(
+            hal::ColorMode colorMode, std::vector<hal::RenderIntent>* outRenderIntents) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getDataspaceSaturationMatrix(
+            hal::Dataspace dataspace, android::mat4* outMatrix) = 0;
 
-    // Doesn't call into the HWC2 device, so no Errors are possible
-    virtual std::vector<std::shared_ptr<const Config>> getConfigs() const = 0;
+    // Doesn't call into the HWC2 device, so no errors are possible
+    [[clang::warn_unused_result]] virtual std::vector<std::shared_ptr<const Config>> getConfigs()
+            const = 0;
 
-    [[clang::warn_unused_result]] virtual Error getName(std::string* outName) const = 0;
-    [[clang::warn_unused_result]] virtual Error getRequests(
-            DisplayRequest* outDisplayRequests,
-            std::unordered_map<Layer*, LayerRequest>* outLayerRequests) = 0;
-    [[clang::warn_unused_result]] virtual Error getConnectionType(
+    [[clang::warn_unused_result]] virtual hal::Error getName(std::string* outName) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getRequests(
+            hal::DisplayRequest* outDisplayRequests,
+            std::unordered_map<Layer*, hal::LayerRequest>* outLayerRequests) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getConnectionType(
             android::DisplayConnectionType*) const = 0;
-    [[clang::warn_unused_result]] virtual Error supportsDoze(bool* outSupport) const = 0;
-    [[clang::warn_unused_result]] virtual Error getHdrCapabilities(
+    [[clang::warn_unused_result]] virtual hal::Error supportsDoze(bool* outSupport) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getHdrCapabilities(
             android::HdrCapabilities* outCapabilities) const = 0;
-    [[clang::warn_unused_result]] virtual Error getDisplayedContentSamplingAttributes(
-            android::ui::PixelFormat* outFormat, android::ui::Dataspace* outDataspace,
+    [[clang::warn_unused_result]] virtual hal::Error getDisplayedContentSamplingAttributes(
+            hal::PixelFormat* outFormat, hal::Dataspace* outDataspace,
             uint8_t* outComponentMask) const = 0;
-    [[clang::warn_unused_result]] virtual Error setDisplayContentSamplingEnabled(
+    [[clang::warn_unused_result]] virtual hal::Error setDisplayContentSamplingEnabled(
             bool enabled, uint8_t componentMask, uint64_t maxFrames) const = 0;
-    [[clang::warn_unused_result]] virtual Error getDisplayedContentSample(
+    [[clang::warn_unused_result]] virtual hal::Error getDisplayedContentSample(
             uint64_t maxFrames, uint64_t timestamp,
             android::DisplayedFrameStats* outStats) const = 0;
-    [[clang::warn_unused_result]] virtual Error getReleaseFences(
+    [[clang::warn_unused_result]] virtual hal::Error getReleaseFences(
             std::unordered_map<Layer*, android::sp<android::Fence>>* outFences) const = 0;
-    [[clang::warn_unused_result]] virtual Error present(
+    [[clang::warn_unused_result]] virtual hal::Error present(
             android::sp<android::Fence>* outPresentFence) = 0;
-    [[clang::warn_unused_result]] virtual Error setActiveConfig(
+    [[clang::warn_unused_result]] virtual hal::Error setActiveConfig(
             const std::shared_ptr<const Config>& config) = 0;
-    [[clang::warn_unused_result]] virtual Error setClientTarget(
+    [[clang::warn_unused_result]] virtual hal::Error setClientTarget(
             uint32_t slot, const android::sp<android::GraphicBuffer>& target,
-            const android::sp<android::Fence>& acquireFence, android::ui::Dataspace dataspace) = 0;
-    [[clang::warn_unused_result]] virtual Error setColorMode(
-            android::ui::ColorMode mode, android::ui::RenderIntent renderIntent) = 0;
-    [[clang::warn_unused_result]] virtual Error setColorTransform(
-            const android::mat4& matrix, android_color_transform_t hint) = 0;
-    [[clang::warn_unused_result]] virtual Error setOutputBuffer(
+            const android::sp<android::Fence>& acquireFence, hal::Dataspace dataspace) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setColorMode(
+            hal::ColorMode mode, hal::RenderIntent renderIntent) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setColorTransform(
+            const android::mat4& matrix, hal::ColorTransform hint) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setOutputBuffer(
             const android::sp<android::GraphicBuffer>& buffer,
             const android::sp<android::Fence>& releaseFence) = 0;
-    [[clang::warn_unused_result]] virtual Error setPowerMode(PowerMode mode) = 0;
-    [[clang::warn_unused_result]] virtual Error setVsyncEnabled(Vsync enabled) = 0;
-    [[clang::warn_unused_result]] virtual Error validate(uint32_t* outNumTypes,
-                                                         uint32_t* outNumRequests) = 0;
-    [[clang::warn_unused_result]] virtual Error presentOrValidate(
+    [[clang::warn_unused_result]] virtual hal::Error setPowerMode(hal::PowerMode mode) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setVsyncEnabled(hal::Vsync enabled) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error validate(uint32_t* outNumTypes,
+                                                              uint32_t* outNumRequests) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error presentOrValidate(
             uint32_t* outNumTypes, uint32_t* outNumRequests,
             android::sp<android::Fence>* outPresentFence, uint32_t* state) = 0;
-    [[clang::warn_unused_result]] virtual Error setDisplayBrightness(float brightness) const = 0;
-    [[clang::warn_unused_result]] virtual Error getDisplayVsyncPeriod(
+    [[clang::warn_unused_result]] virtual hal::Error setDisplayBrightness(
+            float brightness) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getDisplayVsyncPeriod(
             nsecs_t* outVsyncPeriod) const = 0;
-    [[clang::warn_unused_result]] virtual Error setActiveConfigWithConstraints(
+    [[clang::warn_unused_result]] virtual hal::Error setActiveConfigWithConstraints(
             const std::shared_ptr<const HWC2::Display::Config>& config,
-            const VsyncPeriodChangeConstraints& constraints,
-            VsyncPeriodChangeTimeline* outTimeline) = 0;
-    [[clang::warn_unused_result]] virtual Error setAutoLowLatencyMode(bool on) const = 0;
-    [[clang::warn_unused_result]] virtual Error getSupportedContentTypes(
-            std::vector<HWC2::ContentType>*) const = 0;
-    [[clang::warn_unused_result]] virtual Error setContentType(HWC2::ContentType) const = 0;
+            const hal::VsyncPeriodChangeConstraints& constraints,
+            hal::VsyncPeriodChangeTimeline* outTimeline) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setAutoLowLatencyMode(bool on) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error getSupportedContentTypes(
+            std::vector<hal::ContentType>*) const = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setContentType(hal::ContentType) const = 0;
 };
 
 namespace impl {
 
 class Display : public HWC2::Display {
 public:
-    Display(android::Hwc2::Composer& composer, const std::unordered_set<Capability>& capabilities,
-            hwc2_display_t id, DisplayType type);
+    Display(android::Hwc2::Composer& composer,
+            const std::unordered_set<hal::Capability>& capabilities, hal::HWDisplayId id,
+            hal::DisplayType type);
     ~Display() override;
 
     // Required by HWC2
-    Error acceptChanges() override;
-    Error createLayer(Layer** outLayer) override;
-    Error destroyLayer(Layer* layer) override;
-    Error getActiveConfig(std::shared_ptr<const Config>* outConfig) const override;
-    Error getActiveConfigIndex(int* outIndex) const override;
-    Error getChangedCompositionTypes(std::unordered_map<Layer*, Composition>* outTypes) override;
-    Error getColorModes(std::vector<android::ui::ColorMode>* outModes) const override;
+    hal::Error acceptChanges() override;
+    hal::Error createLayer(Layer** outLayer) override;
+    hal::Error destroyLayer(Layer* layer) override;
+    hal::Error getActiveConfig(std::shared_ptr<const Config>* outConfig) const override;
+    hal::Error getActiveConfigIndex(int* outIndex) const override;
+    hal::Error getChangedCompositionTypes(
+            std::unordered_map<Layer*, hal::Composition>* outTypes) override;
+    hal::Error getColorModes(std::vector<hal::ColorMode>* outModes) const override;
     // Returns a bitmask which contains HdrMetadata::Type::*.
     int32_t getSupportedPerFrameMetadata() const override;
-    Error getRenderIntents(android::ui::ColorMode colorMode,
-                           std::vector<android::ui::RenderIntent>* outRenderIntents) const override;
-    Error getDataspaceSaturationMatrix(android::ui::Dataspace dataspace,
-                                       android::mat4* outMatrix) override;
+    hal::Error getRenderIntents(hal::ColorMode colorMode,
+                                std::vector<hal::RenderIntent>* outRenderIntents) const override;
+    hal::Error getDataspaceSaturationMatrix(hal::Dataspace dataspace,
+                                            android::mat4* outMatrix) override;
 
     // Doesn't call into the HWC2 device, so no errors are possible
     std::vector<std::shared_ptr<const Config>> getConfigs() const override;
 
-    Error getName(std::string* outName) const override;
-    Error getRequests(DisplayRequest* outDisplayRequests,
-                      std::unordered_map<Layer*, LayerRequest>* outLayerRequests) override;
-    Error getConnectionType(android::DisplayConnectionType*) const override;
-    Error supportsDoze(bool* outSupport) const override;
-    Error getHdrCapabilities(android::HdrCapabilities* outCapabilities) const override;
-    Error getDisplayedContentSamplingAttributes(android::ui::PixelFormat* outFormat,
-                                                android::ui::Dataspace* outDataspace,
-                                                uint8_t* outComponentMask) const override;
-    Error setDisplayContentSamplingEnabled(bool enabled, uint8_t componentMask,
-                                           uint64_t maxFrames) const override;
-    Error getDisplayedContentSample(uint64_t maxFrames, uint64_t timestamp,
-                                    android::DisplayedFrameStats* outStats) const override;
-    Error getReleaseFences(
+    hal::Error getName(std::string* outName) const override;
+    hal::Error getRequests(
+            hal::DisplayRequest* outDisplayRequests,
+            std::unordered_map<Layer*, hal::LayerRequest>* outLayerRequests) override;
+    hal::Error getConnectionType(android::DisplayConnectionType*) const override;
+    hal::Error supportsDoze(bool* outSupport) const override;
+    hal::Error getHdrCapabilities(android::HdrCapabilities* outCapabilities) const override;
+    hal::Error getDisplayedContentSamplingAttributes(hal::PixelFormat* outFormat,
+                                                     hal::Dataspace* outDataspace,
+                                                     uint8_t* outComponentMask) const override;
+    hal::Error setDisplayContentSamplingEnabled(bool enabled, uint8_t componentMask,
+                                                uint64_t maxFrames) const override;
+    hal::Error getDisplayedContentSample(uint64_t maxFrames, uint64_t timestamp,
+                                         android::DisplayedFrameStats* outStats) const override;
+    hal::Error getReleaseFences(
             std::unordered_map<Layer*, android::sp<android::Fence>>* outFences) const override;
-    Error present(android::sp<android::Fence>* outPresentFence) override;
-    Error setActiveConfig(const std::shared_ptr<const HWC2::Display::Config>& config) override;
-    Error setClientTarget(uint32_t slot, const android::sp<android::GraphicBuffer>& target,
-                          const android::sp<android::Fence>& acquireFence,
-                          android::ui::Dataspace dataspace) override;
-    Error setColorMode(android::ui::ColorMode mode,
-                       android::ui::RenderIntent renderIntent) override;
-    Error setColorTransform(const android::mat4& matrix, android_color_transform_t hint) override;
-    Error setOutputBuffer(const android::sp<android::GraphicBuffer>& buffer,
-                          const android::sp<android::Fence>& releaseFence) override;
-    Error setPowerMode(PowerMode mode) override;
-    Error setVsyncEnabled(Vsync enabled) override;
-    Error validate(uint32_t* outNumTypes, uint32_t* outNumRequests) override;
-    Error presentOrValidate(uint32_t* outNumTypes, uint32_t* outNumRequests,
-                            android::sp<android::Fence>* outPresentFence, uint32_t* state) override;
-    Error setDisplayBrightness(float brightness) const override;
-    Error getDisplayVsyncPeriod(nsecs_t* outVsyncPeriod) const override;
-    Error setActiveConfigWithConstraints(const std::shared_ptr<const HWC2::Display::Config>& config,
-                                         const VsyncPeriodChangeConstraints& constraints,
-                                         VsyncPeriodChangeTimeline* outTimeline) override;
-    Error setAutoLowLatencyMode(bool on) const override;
-    Error getSupportedContentTypes(
-            std::vector<HWC2::ContentType>* outSupportedContentTypes) const override;
-    Error setContentType(HWC2::ContentType contentType) const override;
+    hal::Error present(android::sp<android::Fence>* outPresentFence) override;
+    hal::Error setActiveConfig(const std::shared_ptr<const HWC2::Display::Config>& config) override;
+    hal::Error setClientTarget(uint32_t slot, const android::sp<android::GraphicBuffer>& target,
+                               const android::sp<android::Fence>& acquireFence,
+                               hal::Dataspace dataspace) override;
+    hal::Error setColorMode(hal::ColorMode mode, hal::RenderIntent renderIntent) override;
+    hal::Error setColorTransform(const android::mat4& matrix, hal::ColorTransform hint) override;
+    hal::Error setOutputBuffer(const android::sp<android::GraphicBuffer>& buffer,
+                               const android::sp<android::Fence>& releaseFence) override;
+    hal::Error setPowerMode(hal::PowerMode mode) override;
+    hal::Error setVsyncEnabled(hal::Vsync enabled) override;
+    hal::Error validate(uint32_t* outNumTypes, uint32_t* outNumRequests) override;
+    hal::Error presentOrValidate(uint32_t* outNumTypes, uint32_t* outNumRequests,
+                                 android::sp<android::Fence>* outPresentFence,
+                                 uint32_t* state) override;
+    hal::Error setDisplayBrightness(float brightness) const override;
+    hal::Error getDisplayVsyncPeriod(nsecs_t* outVsyncPeriod) const override;
+    hal::Error setActiveConfigWithConstraints(
+            const std::shared_ptr<const HWC2::Display::Config>& config,
+            const hal::VsyncPeriodChangeConstraints& constraints,
+            hal::VsyncPeriodChangeTimeline* outTimeline) override;
+    hal::Error setAutoLowLatencyMode(bool on) const override;
+    hal::Error getSupportedContentTypes(
+            std::vector<hal::ContentType>* outSupportedContentTypes) const override;
+    hal::Error setContentType(hal::ContentType contentType) const override;
     // Other Display methods
-    hwc2_display_t getId() const override { return mId; }
+    hal::HWDisplayId getId() const override { return mId; }
     bool isConnected() const override { return mIsConnected; }
     void setConnected(bool connected) override; // For use by Device only
-    const std::unordered_set<DisplayCapability>& getCapabilities() const override {
+    const std::unordered_set<hal::DisplayCapability>& getCapabilities() const override {
         return mDisplayCapabilities;
     };
     virtual bool isVsyncPeriodSwitchSupported() const override;
 
 private:
-    int32_t getAttribute(hwc2_config_t configId, Attribute attribute);
-    void loadConfig(hwc2_config_t configId);
+    int32_t getAttribute(hal::HWConfigId configId, hal::Attribute attribute);
+    void loadConfig(hal::HWConfigId configId);
     void loadConfigs();
 
     // This may fail (and return a null pointer) if no layer with this ID exists
     // on this display
-    Layer* getLayerById(hwc2_layer_t id) const;
+    Layer* getLayerById(hal::HWLayerId id) const;
 
     friend android::TestableSurfaceFlinger;
 
@@ -332,17 +330,17 @@
     // this HWC2::Display, so these references are guaranteed to be valid for
     // the lifetime of this object.
     android::Hwc2::Composer& mComposer;
-    const std::unordered_set<Capability>& mCapabilities;
+    const std::unordered_set<hal::Capability>& mCapabilities;
 
-    const hwc2_display_t mId;
-    DisplayType mType;
+    const hal::HWDisplayId mId;
+    hal::DisplayType mType;
     bool mIsConnected = false;
 
-    std::unordered_map<hwc2_layer_t, std::unique_ptr<Layer>> mLayers;
-    std::unordered_map<hwc2_config_t, std::shared_ptr<const Config>> mConfigs;
+    std::unordered_map<hal::HWLayerId, std::unique_ptr<Layer>> mLayers;
+    std::unordered_map<hal::HWConfigId, std::shared_ptr<const Config>> mConfigs;
 
     std::once_flag mDisplayCapabilityQueryFlag;
-    std::unordered_set<DisplayCapability> mDisplayCapabilities;
+    std::unordered_set<hal::DisplayCapability> mDisplayCapabilities;
 };
 
 } // namespace impl
@@ -351,99 +349,105 @@
 public:
     virtual ~Layer();
 
-    virtual hwc2_layer_t getId() const = 0;
+    virtual hal::HWLayerId getId() const = 0;
 
-    [[clang::warn_unused_result]] virtual Error setCursorPosition(int32_t x, int32_t y) = 0;
-    [[clang::warn_unused_result]] virtual Error setBuffer(
+    [[clang::warn_unused_result]] virtual hal::Error setCursorPosition(int32_t x, int32_t y) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setBuffer(
             uint32_t slot, const android::sp<android::GraphicBuffer>& buffer,
             const android::sp<android::Fence>& acquireFence) = 0;
-    [[clang::warn_unused_result]] virtual Error setSurfaceDamage(const android::Region& damage) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setSurfaceDamage(
+            const android::Region& damage) = 0;
 
-    [[clang::warn_unused_result]] virtual Error setBlendMode(BlendMode mode) = 0;
-    [[clang::warn_unused_result]] virtual Error setColor(hwc_color_t color) = 0;
-    [[clang::warn_unused_result]] virtual Error setCompositionType(Composition type) = 0;
-    [[clang::warn_unused_result]] virtual Error setDataspace(android::ui::Dataspace dataspace) = 0;
-    [[clang::warn_unused_result]] virtual Error setPerFrameMetadata(
+    [[clang::warn_unused_result]] virtual hal::Error setBlendMode(hal::BlendMode mode) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setColor(hal::Color color) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setCompositionType(hal::Composition type) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setDataspace(hal::Dataspace dataspace) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setPerFrameMetadata(
             const int32_t supportedPerFrameMetadata, const android::HdrMetadata& metadata) = 0;
-    [[clang::warn_unused_result]] virtual Error setDisplayFrame(const android::Rect& frame) = 0;
-    [[clang::warn_unused_result]] virtual Error setPlaneAlpha(float alpha) = 0;
-    [[clang::warn_unused_result]] virtual Error setSidebandStream(
+    [[clang::warn_unused_result]] virtual hal::Error setDisplayFrame(
+            const android::Rect& frame) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setPlaneAlpha(float alpha) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setSidebandStream(
             const native_handle_t* stream) = 0;
-    [[clang::warn_unused_result]] virtual Error setSourceCrop(const android::FloatRect& crop) = 0;
-    [[clang::warn_unused_result]] virtual Error setTransform(Transform transform) = 0;
-    [[clang::warn_unused_result]] virtual Error setVisibleRegion(const android::Region& region) = 0;
-    [[clang::warn_unused_result]] virtual Error setZOrder(uint32_t z) = 0;
-    [[clang::warn_unused_result]] virtual Error setInfo(uint32_t type, uint32_t appId) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setSourceCrop(
+            const android::FloatRect& crop) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setTransform(hal::Transform transform) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setVisibleRegion(
+            const android::Region& region) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setZOrder(uint32_t z) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setInfo(uint32_t type, uint32_t appId) = 0;
 
     // Composer HAL 2.3
-    [[clang::warn_unused_result]] virtual Error setColorTransform(const android::mat4& matrix) = 0;
+    [[clang::warn_unused_result]] virtual hal::Error setColorTransform(
+            const android::mat4& matrix) = 0;
 
     // Composer HAL 2.4
-    [[clang::warn_unused_result]] virtual Error setLayerGenericMetadata(
+    [[clang::warn_unused_result]] virtual hal::Error setLayerGenericMetadata(
             const std::string& name, bool mandatory, const std::vector<uint8_t>& value) = 0;
 };
 
 namespace impl {
 
-// Convenience C++ class to access hwc2_device_t Layer functions directly.
+// Convenience C++ class to access per layer functions directly.
 
 class Layer : public HWC2::Layer {
 public:
-    Layer(android::Hwc2::Composer& composer, const std::unordered_set<Capability>& capabilities,
-          hwc2_display_t displayId, hwc2_layer_t layerId);
+    Layer(android::Hwc2::Composer& composer,
+          const std::unordered_set<hal::Capability>& capabilities, hal::HWDisplayId displayId,
+          hal::HWLayerId layerId);
     ~Layer() override;
 
-    hwc2_layer_t getId() const override { return mId; }
+    hal::HWLayerId getId() const override { return mId; }
 
-    Error setCursorPosition(int32_t x, int32_t y) override;
-    Error setBuffer(uint32_t slot, const android::sp<android::GraphicBuffer>& buffer,
-                    const android::sp<android::Fence>& acquireFence) override;
-    Error setSurfaceDamage(const android::Region& damage) override;
+    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 setSurfaceDamage(const android::Region& damage) override;
 
-    Error setBlendMode(BlendMode mode) override;
-    Error setColor(hwc_color_t color) override;
-    Error setCompositionType(Composition type) override;
-    Error setDataspace(android::ui::Dataspace dataspace) override;
-    Error setPerFrameMetadata(const int32_t supportedPerFrameMetadata,
-                              const android::HdrMetadata& metadata) override;
-    Error setDisplayFrame(const android::Rect& frame) override;
-    Error setPlaneAlpha(float alpha) override;
-    Error setSidebandStream(const native_handle_t* stream) override;
-    Error setSourceCrop(const android::FloatRect& crop) override;
-    Error setTransform(Transform transform) override;
-    Error setVisibleRegion(const android::Region& region) override;
-    Error setZOrder(uint32_t z) override;
-    Error setInfo(uint32_t type, uint32_t appId) override;
+    hal::Error setBlendMode(hal::BlendMode mode) override;
+    hal::Error setColor(hal::Color color) override;
+    hal::Error setCompositionType(hal::Composition type) override;
+    hal::Error setDataspace(hal::Dataspace dataspace) override;
+    hal::Error setPerFrameMetadata(const int32_t supportedPerFrameMetadata,
+                                   const android::HdrMetadata& metadata) override;
+    hal::Error setDisplayFrame(const android::Rect& frame) override;
+    hal::Error setPlaneAlpha(float alpha) override;
+    hal::Error setSidebandStream(const native_handle_t* stream) override;
+    hal::Error setSourceCrop(const android::FloatRect& crop) override;
+    hal::Error setTransform(hal::Transform transform) override;
+    hal::Error setVisibleRegion(const android::Region& region) override;
+    hal::Error setZOrder(uint32_t z) override;
+    hal::Error setInfo(uint32_t type, uint32_t appId) override;
 
     // Composer HAL 2.3
-    Error setColorTransform(const android::mat4& matrix) override;
+    hal::Error setColorTransform(const android::mat4& matrix) override;
 
     // Composer HAL 2.4
-    Error setLayerGenericMetadata(const std::string& name, bool mandatory,
-                                  const std::vector<uint8_t>& value) override;
+    hal::Error setLayerGenericMetadata(const std::string& name, bool mandatory,
+                                       const std::vector<uint8_t>& value) override;
 
 private:
     // These are references to data owned by HWC2::Device, which will outlive
     // this HWC2::Layer, so these references are guaranteed to be valid for
     // the lifetime of this object.
     android::Hwc2::Composer& mComposer;
-    const std::unordered_set<Capability>& mCapabilities;
+    const std::unordered_set<hal::Capability>& mCapabilities;
 
-    hwc2_display_t mDisplayId;
-    hwc2_layer_t mId;
+    hal::HWDisplayId mDisplayId;
+    hal::HWLayerId mId;
 
     // Cached HWC2 data, to ensure the same commands aren't sent to the HWC
     // multiple times.
     android::Region mVisibleRegion = android::Region::INVALID_REGION;
     android::Region mDamageRegion = android::Region::INVALID_REGION;
-    android::ui::Dataspace mDataSpace = android::ui::Dataspace::UNKNOWN;
+    hal::Dataspace mDataSpace = hal::Dataspace::UNKNOWN;
     android::HdrMetadata mHdrMetadata;
     android::mat4 mColorMatrix;
     uint32_t mBufferSlot;
 };
 
 } // namespace impl
-
 } // namespace HWC2
+} // namespace android
 
 #endif // ANDROID_SF_HWC2_H
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index f30d662..4344a8d 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -60,7 +60,7 @@
 
 #define RETURN_IF_HWC_ERROR_FOR(what, error, displayId, ...) \
     do {                                                     \
-        if (error != HWC2::Error::None) {                    \
+        if (error != hal::Error::NONE) {                     \
             LOG_HWC_ERROR(what, error, displayId);           \
             return __VA_ARGS__;                              \
         }                                                    \
@@ -69,34 +69,34 @@
 #define RETURN_IF_HWC_ERROR(error, displayId, ...) \
     RETURN_IF_HWC_ERROR_FOR(__FUNCTION__, error, displayId, __VA_ARGS__)
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 namespace {
 
 using android::hardware::Return;
 using android::hardware::Void;
+using android::HWC2::ComposerCallback;
 
-class ComposerCallbackBridge : public android::Hwc2::IComposerCallback {
+class ComposerCallbackBridge : public hal::IComposerCallback {
 public:
-    ComposerCallbackBridge(HWC2::ComposerCallback* callback, int32_t sequenceId,
+    ComposerCallbackBridge(ComposerCallback* callback, int32_t sequenceId,
                            bool vsyncSwitchingSupported)
           : mCallback(callback),
             mSequenceId(sequenceId),
             mVsyncSwitchingSupported(vsyncSwitchingSupported) {}
 
-    android::hardware::Return<void> onHotplug(
-            android::Hwc2::Display display,
-            android::Hwc2::IComposerCallback::Connection conn) override {
-        HWC2::Connection connection = static_cast<HWC2::Connection>(conn);
-        mCallback->onHotplugReceived(mSequenceId, display, connection);
+    android::hardware::Return<void> onHotplug(hal::HWDisplayId display,
+                                              hal::Connection conn) override {
+        mCallback->onHotplugReceived(mSequenceId, display, conn);
         return android::hardware::Void();
     }
 
-    android::hardware::Return<void> onRefresh(android::Hwc2::Display display) override {
+    android::hardware::Return<void> onRefresh(hal::HWDisplayId display) override {
         mCallback->onRefreshReceived(mSequenceId, display);
         return android::hardware::Void();
     }
 
-    android::hardware::Return<void> onVsync(android::Hwc2::Display display,
-                                            int64_t timestamp) override {
+    android::hardware::Return<void> onVsync(hal::HWDisplayId display, int64_t timestamp) override {
         if (!mVsyncSwitchingSupported) {
             mCallback->onVsyncReceived(mSequenceId, display, timestamp, std::nullopt);
         } else {
@@ -105,9 +105,8 @@
         return android::hardware::Void();
     }
 
-    android::hardware::Return<void> onVsync_2_4(
-            android::Hwc2::Display display, int64_t timestamp,
-            android::Hwc2::VsyncPeriodNanos vsyncPeriodNanos) override {
+    android::hardware::Return<void> onVsync_2_4(hal::HWDisplayId display, int64_t timestamp,
+                                                hal::VsyncPeriodNanos vsyncPeriodNanos) override {
         if (mVsyncSwitchingSupported) {
             mCallback->onVsyncReceived(mSequenceId, display, timestamp,
                                        std::make_optional(vsyncPeriodNanos));
@@ -118,23 +117,19 @@
     }
 
     android::hardware::Return<void> onVsyncPeriodTimingChanged(
-            android::Hwc2::Display display,
-            const android::Hwc2::VsyncPeriodChangeTimeline& updatedTimeline) override {
-        hwc_vsync_period_change_timeline_t timeline;
-        timeline.newVsyncAppliedTimeNanos = updatedTimeline.newVsyncAppliedTimeNanos;
-        timeline.refreshRequired = updatedTimeline.refreshRequired;
-        timeline.refreshTimeNanos = updatedTimeline.refreshTimeNanos;
-        mCallback->onVsyncPeriodTimingChangedReceived(mSequenceId, display, timeline);
+            hal::HWDisplayId display,
+            const hal::VsyncPeriodChangeTimeline& updatedTimeline) override {
+        mCallback->onVsyncPeriodTimingChangedReceived(mSequenceId, display, updatedTimeline);
         return android::hardware::Void();
     }
 
-    android::hardware::Return<void> onSeamlessPossible(android::Hwc2::Display display) override {
+    android::hardware::Return<void> onSeamlessPossible(hal::HWDisplayId display) override {
         mCallback->onSeamlessPossible(mSequenceId, display);
         return android::hardware::Void();
     }
 
 private:
-    HWC2::ComposerCallback* mCallback;
+    ComposerCallback* mCallback;
     const int32_t mSequenceId;
     const bool mVsyncSwitchingSupported;
 };
@@ -173,12 +168,12 @@
     mComposer->registerCallback(callbackBridge);
 }
 
-bool HWComposer::getDisplayIdentificationData(hwc2_display_t hwcDisplayId, uint8_t* outPort,
+bool HWComposer::getDisplayIdentificationData(hal::HWDisplayId hwcDisplayId, uint8_t* outPort,
                                               DisplayIdentificationData* outData) const {
-    const auto error = static_cast<HWC2::Error>(
+    const auto error = static_cast<hal::Error>(
             mComposer->getDisplayIdentificationData(hwcDisplayId, outPort, outData));
-    if (error != HWC2::Error::None) {
-        if (error != HWC2::Error::Unsupported) {
+    if (error != hal::Error::NONE) {
+        if (error != hal::Error::UNSUPPORTED) {
             LOG_HWC_DISPLAY_ERROR(hwcDisplayId, to_string(error).c_str());
         }
         return false;
@@ -186,29 +181,29 @@
     return true;
 }
 
-bool HWComposer::hasCapability(HWC2::Capability capability) const {
+bool HWComposer::hasCapability(hal::Capability capability) const {
     return mCapabilities.count(capability) > 0;
 }
 
 bool HWComposer::hasDisplayCapability(DisplayId displayId,
-                                      HWC2::DisplayCapability capability) const {
+                                      hal::DisplayCapability capability) const {
     RETURN_IF_INVALID_DISPLAY(displayId, false);
     return mDisplayData.at(displayId).hwcDisplay->getCapabilities().count(capability) > 0;
 }
 
-std::optional<DisplayIdentificationInfo> HWComposer::onHotplug(hwc2_display_t hwcDisplayId,
-                                                               HWC2::Connection connection) {
+std::optional<DisplayIdentificationInfo> HWComposer::onHotplug(hal::HWDisplayId hwcDisplayId,
+                                                               hal::Connection connection) {
     switch (connection) {
-        case HWC2::Connection::Connected:
+        case hal::Connection::CONNECTED:
             return onHotplugConnect(hwcDisplayId);
-        case HWC2::Connection::Disconnected:
+        case hal::Connection::DISCONNECTED:
             return onHotplugDisconnect(hwcDisplayId);
-        case HWC2::Connection::Invalid:
+        case hal::Connection::INVALID:
             return {};
     }
 }
 
-bool HWComposer::onVsync(hwc2_display_t hwcDisplayId, int64_t timestamp) {
+bool HWComposer::onVsync(hal::HWDisplayId hwcDisplayId, int64_t timestamp) {
     const auto displayId = toPhysicalDisplayId(hwcDisplayId);
     if (!displayId) {
         LOG_HWC_DISPLAY_ERROR(hwcDisplayId, "Invalid HWC display");
@@ -260,16 +255,16 @@
               height, SurfaceFlinger::maxVirtualDisplaySize);
         return {};
     }
-    hwc2_display_t hwcDisplayId = 0;
-    const auto error = static_cast<HWC2::Error>(
+    hal::HWDisplayId hwcDisplayId = 0;
+    const auto error = static_cast<hal::Error>(
             mComposer->createVirtualDisplay(width, height, format, &hwcDisplayId));
-    if (error != HWC2::Error::None) {
+    if (error != hal::Error::NONE) {
         ALOGE("%s: Failed to create HWC virtual display", __FUNCTION__);
         return {};
     }
 
     auto display = std::make_unique<HWC2::impl::Display>(*mComposer.get(), mCapabilities,
-                                                         hwcDisplayId, HWC2::DisplayType::Virtual);
+                                                         hwcDisplayId, hal::DisplayType::VIRTUAL);
     display->setConnected(true);
 
     DisplayId displayId;
@@ -288,7 +283,7 @@
     return displayId;
 }
 
-void HWComposer::allocatePhysicalDisplay(hwc2_display_t hwcDisplayId, DisplayId displayId) {
+void HWComposer::allocatePhysicalDisplay(hal::HWDisplayId hwcDisplayId, DisplayId displayId) {
     if (!mInternalHwcDisplayId) {
         mInternalHwcDisplayId = hwcDisplayId;
     } else if (mInternalHwcDisplayId != hwcDisplayId && !mExternalHwcDisplayId) {
@@ -298,7 +293,7 @@
     auto& displayData = mDisplayData[displayId];
     auto newDisplay =
             std::make_unique<HWC2::impl::Display>(*mComposer.get(), mCapabilities, hwcDisplayId,
-                                                  HWC2::DisplayType::Physical);
+                                                  hal::DisplayType::PHYSICAL);
     newDisplay->setConnected(true);
     displayData.hwcDisplay = std::move(newDisplay);
     mPhysicalDisplayIdMap[hwcDisplayId] = displayId;
@@ -357,7 +352,7 @@
 
     std::shared_ptr<const HWC2::Display::Config> config;
     auto error = mDisplayData.at(displayId).hwcDisplay->getActiveConfig(&config);
-    if (error == HWC2::Error::BadConfig) {
+    if (error == hal::Error::BAD_CONFIG) {
         LOG_DISPLAY_ERROR(displayId, "No active config");
         return nullptr;
     }
@@ -408,7 +403,7 @@
 
     int index;
     auto error = mDisplayData.at(displayId).hwcDisplay->getActiveConfigIndex(&index);
-    if (error == HWC2::Error::BadConfig) {
+    if (error == hal::Error::BAD_CONFIG) {
         LOG_DISPLAY_ERROR(displayId, "No active config");
         return -1;
     }
@@ -446,7 +441,7 @@
     return NO_ERROR;
 }
 
-void HWComposer::setVsyncEnabled(DisplayId displayId, HWC2::Vsync enabled) {
+void HWComposer::setVsyncEnabled(DisplayId displayId, hal::Vsync enabled) {
     RETURN_IF_INVALID_DISPLAY(displayId);
     auto& displayData = mDisplayData[displayId];
 
@@ -471,7 +466,7 @@
     displayData.vsyncEnabled = enabled;
 
     const auto tag = "HW_VSYNC_ON_" + to_string(displayId);
-    ATRACE_INT(tag.c_str(), enabled == HWC2::Vsync::Enable ? 1 : 0);
+    ATRACE_INT(tag.c_str(), enabled == hal::Vsync::ENABLE ? 1 : 0);
 }
 
 status_t HWComposer::setClientTarget(DisplayId displayId, uint32_t slot,
@@ -502,7 +497,7 @@
     uint32_t numTypes = 0;
     uint32_t numRequests = 0;
 
-    HWC2::Error error = HWC2::Error::None;
+    hal::Error error = hal::Error::NONE;
 
     // First try to skip validate altogether when there is no client
     // composition.  When there is client composition, since we haven't
@@ -513,7 +508,7 @@
         sp<Fence> outPresentFence;
         uint32_t state = UINT32_MAX;
         error = hwcDisplay->presentOrValidate(&numTypes, &numRequests, &outPresentFence , &state);
-        if (error != HWC2::Error::HasChanges) {
+        if (!hasChangesError(error)) {
             RETURN_IF_HWC_ERROR_FOR("presentOrValidate", error, displayId, UNKNOWN_ERROR);
         }
         if (state == 1) { //Present Succeeded.
@@ -530,7 +525,7 @@
         error = hwcDisplay->validate(&numTypes, &numRequests);
     }
     ALOGV("SkipValidate failed, Falling back to SLOW validate/present");
-    if (error != HWC2::Error::HasChanges) {
+    if (!hasChangesError(error)) {
         RETURN_IF_HWC_ERROR_FOR("validate", error, displayId, BAD_INDEX);
     }
 
@@ -539,7 +534,7 @@
     error = hwcDisplay->getChangedCompositionTypes(&changedTypes);
     RETURN_IF_HWC_ERROR_FOR("getChangedCompositionTypes", error, displayId, BAD_INDEX);
 
-    auto displayRequests = static_cast<HWC2::DisplayRequest>(0);
+    auto displayRequests = static_cast<hal::DisplayRequest>(0);
     android::HWComposer::DeviceRequestedChanges::LayerRequests layerRequests;
     layerRequests.reserve(numRequests);
     error = hwcDisplay->getRequests(&displayRequests, &layerRequests);
@@ -580,7 +575,7 @@
 
     if (displayData.validateWasSkipped) {
         // explicitly flush all pending commands
-        auto error = static_cast<HWC2::Error>(mComposer->executeCommands());
+        auto error = static_cast<hal::Error>(mComposer->executeCommands());
         RETURN_IF_HWC_ERROR_FOR("executeCommands", error, displayId, UNKNOWN_ERROR);
         RETURN_IF_HWC_ERROR_FOR("present", displayData.presentError, displayId, UNKNOWN_ERROR);
         return NO_ERROR;
@@ -598,7 +593,7 @@
     return NO_ERROR;
 }
 
-status_t HWComposer::setPowerMode(DisplayId displayId, int32_t intMode) {
+status_t HWComposer::setPowerMode(DisplayId displayId, hal::PowerMode mode) {
     RETURN_IF_INVALID_DISPLAY(displayId, BAD_INDEX);
 
     const auto& displayData = mDisplayData[displayId];
@@ -607,42 +602,41 @@
         return INVALID_OPERATION;
     }
 
-    auto mode = static_cast<HWC2::PowerMode>(intMode);
-    if (mode == HWC2::PowerMode::Off) {
-        setVsyncEnabled(displayId, HWC2::Vsync::Disable);
+    if (mode == hal::PowerMode::OFF) {
+        setVsyncEnabled(displayId, hal::Vsync::DISABLE);
     }
 
     auto& hwcDisplay = displayData.hwcDisplay;
     switch (mode) {
-        case HWC2::PowerMode::Off:
-        case HWC2::PowerMode::On:
+        case hal::PowerMode::OFF:
+        case hal::PowerMode::ON:
             ALOGV("setPowerMode: Calling HWC %s", to_string(mode).c_str());
             {
                 auto error = hwcDisplay->setPowerMode(mode);
-                if (error != HWC2::Error::None) {
-                    LOG_HWC_ERROR(("setPowerMode(" + to_string(mode) + ")").c_str(),
-                                  error, displayId);
+                if (error != hal::Error::NONE) {
+                    LOG_HWC_ERROR(("setPowerMode(" + to_string(mode) + ")").c_str(), error,
+                                  displayId);
                 }
             }
             break;
-        case HWC2::PowerMode::Doze:
-        case HWC2::PowerMode::DozeSuspend:
+        case hal::PowerMode::DOZE:
+        case hal::PowerMode::DOZE_SUSPEND:
             ALOGV("setPowerMode: Calling HWC %s", to_string(mode).c_str());
             {
                 bool supportsDoze = false;
                 auto error = hwcDisplay->supportsDoze(&supportsDoze);
-                if (error != HWC2::Error::None) {
+                if (error != hal::Error::NONE) {
                     LOG_HWC_ERROR("supportsDoze", error, displayId);
                 }
 
                 if (!supportsDoze) {
-                    mode = HWC2::PowerMode::On;
+                    mode = hal::PowerMode::ON;
                 }
 
                 error = hwcDisplay->setPowerMode(mode);
-                if (error != HWC2::Error::None) {
-                    LOG_HWC_ERROR(("setPowerMode(" + to_string(mode) + ")").c_str(),
-                                  error, displayId);
+                if (error != hal::Error::NONE) {
+                    LOG_HWC_ERROR(("setPowerMode(" + to_string(mode) + ")").c_str(), error,
+                                  displayId);
                 }
             }
             break;
@@ -655,8 +649,8 @@
 }
 
 status_t HWComposer::setActiveConfigWithConstraints(
-        DisplayId displayId, size_t configId, const HWC2::VsyncPeriodChangeConstraints& constraints,
-        HWC2::VsyncPeriodChangeTimeline* outTimeline) {
+        DisplayId displayId, size_t configId, const hal::VsyncPeriodChangeConstraints& constraints,
+        hal::VsyncPeriodChangeTimeline* outTimeline) {
     RETURN_IF_INVALID_DISPLAY(displayId, BAD_INDEX);
 
     auto& displayData = mDisplayData[displayId];
@@ -677,9 +671,10 @@
 
     auto& displayData = mDisplayData[displayId];
     bool isIdentity = transform == mat4();
-    auto error = displayData.hwcDisplay->setColorTransform(transform,
-            isIdentity ? HAL_COLOR_TRANSFORM_IDENTITY :
-            HAL_COLOR_TRANSFORM_ARBITRARY_MATRIX);
+    auto error = displayData.hwcDisplay
+                         ->setColorTransform(transform,
+                                             isIdentity ? hal::ColorTransform::IDENTITY
+                                                        : hal::ColorTransform::ARBITRARY_MATRIX);
     RETURN_IF_HWC_ERROR(error, displayId, UNKNOWN_ERROR);
     return NO_ERROR;
 }
@@ -770,7 +765,7 @@
             mDisplayData[displayId]
                     .hwcDisplay->getDisplayedContentSamplingAttributes(outFormat, outDataspace,
                                                                        outComponentMask);
-    if (error == HWC2::Error::Unsupported) RETURN_IF_HWC_ERROR(error, displayId, INVALID_OPERATION);
+    if (error == hal::Error::UNSUPPORTED) RETURN_IF_HWC_ERROR(error, displayId, INVALID_OPERATION);
     RETURN_IF_HWC_ERROR(error, displayId, UNKNOWN_ERROR);
     return NO_ERROR;
 }
@@ -783,8 +778,8 @@
                                                                                  componentMask,
                                                                                  maxFrames);
 
-    if (error == HWC2::Error::Unsupported) RETURN_IF_HWC_ERROR(error, displayId, INVALID_OPERATION);
-    if (error == HWC2::Error::BadParameter) RETURN_IF_HWC_ERROR(error, displayId, BAD_VALUE);
+    if (error == hal::Error::UNSUPPORTED) RETURN_IF_HWC_ERROR(error, displayId, INVALID_OPERATION);
+    if (error == hal::Error::BAD_PARAMETER) RETURN_IF_HWC_ERROR(error, displayId, BAD_VALUE);
     RETURN_IF_HWC_ERROR(error, displayId, UNKNOWN_ERROR);
     return NO_ERROR;
 }
@@ -802,10 +797,10 @@
 status_t HWComposer::setDisplayBrightness(DisplayId displayId, float brightness) {
     RETURN_IF_INVALID_DISPLAY(displayId, BAD_INDEX);
     const auto error = mDisplayData[displayId].hwcDisplay->setDisplayBrightness(brightness);
-    if (error == HWC2::Error::Unsupported) {
+    if (error == hal::Error::UNSUPPORTED) {
         RETURN_IF_HWC_ERROR(error, displayId, INVALID_OPERATION);
     }
-    if (error == HWC2::Error::BadParameter) {
+    if (error == hal::Error::BAD_PARAMETER) {
         RETURN_IF_HWC_ERROR(error, displayId, BAD_VALUE);
     }
     RETURN_IF_HWC_ERROR(error, displayId, UNKNOWN_ERROR);
@@ -819,10 +814,10 @@
 status_t HWComposer::setAutoLowLatencyMode(DisplayId displayId, bool on) {
     RETURN_IF_INVALID_DISPLAY(displayId, BAD_INDEX);
     const auto error = mDisplayData[displayId].hwcDisplay->setAutoLowLatencyMode(on);
-    if (error == HWC2::Error::Unsupported) {
+    if (error == hal::Error::UNSUPPORTED) {
         RETURN_IF_HWC_ERROR(error, displayId, INVALID_OPERATION);
     }
-    if (error == HWC2::Error::BadParameter) {
+    if (error == hal::Error::BAD_PARAMETER) {
         RETURN_IF_HWC_ERROR(error, displayId, BAD_VALUE);
     }
     RETURN_IF_HWC_ERROR(error, displayId, UNKNOWN_ERROR);
@@ -830,7 +825,7 @@
 }
 
 status_t HWComposer::getSupportedContentTypes(
-        DisplayId displayId, std::vector<HWC2::ContentType>* outSupportedContentTypes) {
+        DisplayId displayId, std::vector<hal::ContentType>* outSupportedContentTypes) {
     RETURN_IF_INVALID_DISPLAY(displayId, BAD_INDEX);
     const auto error =
             mDisplayData[displayId].hwcDisplay->getSupportedContentTypes(outSupportedContentTypes);
@@ -840,13 +835,13 @@
     return NO_ERROR;
 }
 
-status_t HWComposer::setContentType(DisplayId displayId, HWC2::ContentType contentType) {
+status_t HWComposer::setContentType(DisplayId displayId, hal::ContentType contentType) {
     RETURN_IF_INVALID_DISPLAY(displayId, BAD_INDEX);
     const auto error = mDisplayData[displayId].hwcDisplay->setContentType(contentType);
-    if (error == HWC2::Error::Unsupported) {
+    if (error == hal::Error::UNSUPPORTED) {
         RETURN_IF_HWC_ERROR(error, displayId, INVALID_OPERATION);
     }
-    if (error == HWC2::Error::BadParameter) {
+    if (error == hal::Error::BAD_PARAMETER) {
         RETURN_IF_HWC_ERROR(error, displayId, BAD_VALUE);
     }
     RETURN_IF_HWC_ERROR(error, displayId, UNKNOWN_ERROR);
@@ -862,7 +857,7 @@
     result.append(mComposer->dumpDebugInfo());
 }
 
-std::optional<DisplayId> HWComposer::toPhysicalDisplayId(hwc2_display_t hwcDisplayId) const {
+std::optional<DisplayId> HWComposer::toPhysicalDisplayId(hal::HWDisplayId hwcDisplayId) const {
     if (const auto it = mPhysicalDisplayIdMap.find(hwcDisplayId);
         it != mPhysicalDisplayIdMap.end()) {
         return it->second;
@@ -870,7 +865,7 @@
     return {};
 }
 
-std::optional<hwc2_display_t> HWComposer::fromPhysicalDisplayId(DisplayId displayId) const {
+std::optional<hal::HWDisplayId> HWComposer::fromPhysicalDisplayId(DisplayId displayId) const {
     if (const auto it = mDisplayData.find(displayId);
         it != mDisplayData.end() && !it->second.isVirtual) {
         return it->second.hwcDisplay->getId();
@@ -878,7 +873,7 @@
     return {};
 }
 
-bool HWComposer::shouldIgnoreHotplugConnect(hwc2_display_t hwcDisplayId,
+bool HWComposer::shouldIgnoreHotplugConnect(hal::HWDisplayId hwcDisplayId,
                                             bool hasDisplayIdentificationData) const {
     if (isUsingVrComposer() && mInternalHwcDisplayId) {
         ALOGE("Ignoring connection of external display %" PRIu64 " in VR mode", hwcDisplayId);
@@ -899,7 +894,8 @@
     return false;
 }
 
-std::optional<DisplayIdentificationInfo> HWComposer::onHotplugConnect(hwc2_display_t hwcDisplayId) {
+std::optional<DisplayIdentificationInfo> HWComposer::onHotplugConnect(
+        hal::HWDisplayId hwcDisplayId) {
     std::optional<DisplayIdentificationInfo> info;
     if (const auto displayId = toPhysicalDisplayId(hwcDisplayId)) {
         info = DisplayIdentificationInfo{.id = *displayId,
@@ -930,7 +926,7 @@
             } else {
                 ALOGW_IF(hasDisplayIdentificationData,
                          "Ignoring identification data for display %" PRIu64, hwcDisplayId);
-                port = isPrimary ? HWC_DISPLAY_PRIMARY : HWC_DISPLAY_EXTERNAL;
+                port = isPrimary ? LEGACY_DISPLAY_TYPE_PRIMARY : LEGACY_DISPLAY_TYPE_EXTERNAL;
             }
 
             return DisplayIdentificationInfo{.id = getFallbackDisplayId(port),
@@ -947,7 +943,7 @@
 }
 
 std::optional<DisplayIdentificationInfo> HWComposer::onHotplugDisconnect(
-        hwc2_display_t hwcDisplayId) {
+        hal::HWDisplayId hwcDisplayId) {
     const auto displayId = toPhysicalDisplayId(hwcDisplayId);
     if (!displayId) {
         ALOGE("Ignoring disconnection of invalid HWC display %" PRIu64, hwcDisplayId);
@@ -969,10 +965,10 @@
 }
 
 void HWComposer::loadCapabilities() {
-    static_assert(sizeof(HWC2::Capability) == sizeof(int32_t), "Capability size has changed");
+    static_assert(sizeof(hal::Capability) == sizeof(int32_t), "Capability size has changed");
     auto capabilities = mComposer->getCapabilities();
     for (auto capability : capabilities) {
-        mCapabilities.emplace(static_cast<HWC2::Capability>(capability));
+        mCapabilities.emplace(static_cast<hal::Capability>(capability));
     }
 }
 
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index e18419a..cfa2193 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -39,9 +39,12 @@
 
 #include "DisplayIdentification.h"
 #include "HWC2.h"
+#include "Hal.h"
 
 namespace android {
 
+namespace hal = hardware::graphics::composer::hal;
+
 struct DisplayedFrameStats;
 class GraphicBuffer;
 class TestableSurfaceFlinger;
@@ -66,18 +69,18 @@
 
     virtual void setConfiguration(HWC2::ComposerCallback* callback, int32_t sequenceId) = 0;
 
-    virtual bool getDisplayIdentificationData(hwc2_display_t hwcDisplayId, uint8_t* outPort,
+    virtual bool getDisplayIdentificationData(hal::HWDisplayId hwcDisplayId, uint8_t* outPort,
                                               DisplayIdentificationData* outData) const = 0;
 
-    virtual bool hasCapability(HWC2::Capability capability) const = 0;
+    virtual bool hasCapability(hal::Capability capability) const = 0;
     virtual bool hasDisplayCapability(DisplayId displayId,
-                                      HWC2::DisplayCapability capability) const = 0;
+                                      hal::DisplayCapability capability) const = 0;
 
     // Attempts to allocate a virtual display and returns its ID if created on the HWC device.
     virtual std::optional<DisplayId> allocateVirtualDisplay(uint32_t width, uint32_t height,
                                                             ui::PixelFormat* format) = 0;
 
-    virtual void allocatePhysicalDisplay(hwc2_display_t hwcDisplayId, DisplayId displayId) = 0;
+    virtual void allocatePhysicalDisplay(hal::HWDisplayId hwcDisplayId, DisplayId displayId) = 0;
 
     // Attempts to create a new layer on this display
     virtual HWC2::Layer* createLayer(DisplayId displayId) = 0;
@@ -85,9 +88,9 @@
     virtual void destroyLayer(DisplayId displayId, HWC2::Layer* layer) = 0;
 
     struct DeviceRequestedChanges {
-        using ChangedTypes = std::unordered_map<HWC2::Layer*, HWC2::Composition>;
-        using DisplayRequests = HWC2::DisplayRequest;
-        using LayerRequests = std::unordered_map<HWC2::Layer*, HWC2::LayerRequest>;
+        using ChangedTypes = std::unordered_map<HWC2::Layer*, hal::Composition>;
+        using DisplayRequests = hal::DisplayRequest;
+        using LayerRequests = std::unordered_map<HWC2::Layer*, hal::LayerRequest>;
 
         ChangedTypes changedTypes;
         DisplayRequests displayRequests;
@@ -113,7 +116,7 @@
     virtual status_t presentAndGetReleaseFences(DisplayId displayId) = 0;
 
     // set power mode
-    virtual status_t setPowerMode(DisplayId displayId, int mode) = 0;
+    virtual status_t setPowerMode(DisplayId displayId, hal::PowerMode mode) = 0;
 
     // Sets a color transform to be applied to the result of composition
     virtual status_t setColorTransform(DisplayId displayId, const mat4& transform) = 0;
@@ -167,11 +170,11 @@
     // Returns stable display ID (and display name on connection of new or previously disconnected
     // display), or std::nullopt if hotplug event was ignored.
     // This function is called from SurfaceFlinger.
-    virtual std::optional<DisplayIdentificationInfo> onHotplug(hwc2_display_t hwcDisplayId,
-                                                               HWC2::Connection connection) = 0;
+    virtual std::optional<DisplayIdentificationInfo> onHotplug(hal::HWDisplayId hwcDisplayId,
+                                                               hal::Connection connection) = 0;
 
-    virtual bool onVsync(hwc2_display_t hwcDisplayId, int64_t timestamp) = 0;
-    virtual void setVsyncEnabled(DisplayId displayId, HWC2::Vsync enabled) = 0;
+    virtual bool onVsync(hal::HWDisplayId hwcDisplayId, int64_t timestamp) = 0;
+    virtual void setVsyncEnabled(DisplayId displayId, hal::Vsync enabled) = 0;
 
     virtual nsecs_t getRefreshTimestamp(DisplayId displayId) const = 0;
     virtual bool isConnected(DisplayId displayId) const = 0;
@@ -197,12 +200,12 @@
     virtual nsecs_t getDisplayVsyncPeriod(DisplayId displayId) const = 0;
     virtual status_t setActiveConfigWithConstraints(
             DisplayId displayId, size_t configId,
-            const HWC2::VsyncPeriodChangeConstraints& constraints,
-            HWC2::VsyncPeriodChangeTimeline* outTimeline) = 0;
+            const hal::VsyncPeriodChangeConstraints& constraints,
+            hal::VsyncPeriodChangeTimeline* outTimeline) = 0;
     virtual status_t setAutoLowLatencyMode(DisplayId displayId, bool on) = 0;
     virtual status_t getSupportedContentTypes(
-            DisplayId displayId, std::vector<HWC2::ContentType>* outSupportedContentTypes) = 0;
-    virtual status_t setContentType(DisplayId displayId, HWC2::ContentType contentType) = 0;
+            DisplayId displayId, std::vector<hal::ContentType>* outSupportedContentTypes) = 0;
+    virtual status_t setContentType(DisplayId displayId, hal::ContentType contentType) = 0;
     virtual const std::unordered_map<std::string, bool>& getSupportedLayerGenericMetadata()
             const = 0;
 
@@ -212,11 +215,11 @@
     virtual Hwc2::Composer* getComposer() const = 0;
 
     // TODO(b/74619554): Remove special cases for internal/external display.
-    virtual std::optional<hwc2_display_t> getInternalHwcDisplayId() const = 0;
-    virtual std::optional<hwc2_display_t> getExternalHwcDisplayId() const = 0;
+    virtual std::optional<hal::HWDisplayId> getInternalHwcDisplayId() const = 0;
+    virtual std::optional<hal::HWDisplayId> getExternalHwcDisplayId() const = 0;
 
-    virtual std::optional<DisplayId> toPhysicalDisplayId(hwc2_display_t hwcDisplayId) const = 0;
-    virtual std::optional<hwc2_display_t> fromPhysicalDisplayId(DisplayId displayId) const = 0;
+    virtual std::optional<DisplayId> toPhysicalDisplayId(hal::HWDisplayId hwcDisplayId) const = 0;
+    virtual std::optional<hal::HWDisplayId> fromPhysicalDisplayId(DisplayId displayId) const = 0;
 };
 
 namespace impl {
@@ -230,19 +233,19 @@
 
     void setConfiguration(HWC2::ComposerCallback* callback, int32_t sequenceId) override;
 
-    bool getDisplayIdentificationData(hwc2_display_t hwcDisplayId, uint8_t* outPort,
+    bool getDisplayIdentificationData(hal::HWDisplayId hwcDisplayId, uint8_t* outPort,
                                       DisplayIdentificationData* outData) const override;
 
-    bool hasCapability(HWC2::Capability capability) const override;
+    bool hasCapability(hal::Capability capability) const override;
     bool hasDisplayCapability(DisplayId displayId,
-                              HWC2::DisplayCapability capability) const override;
+                              hal::DisplayCapability capability) const override;
 
     // Attempts to allocate a virtual display and returns its ID if created on the HWC device.
     std::optional<DisplayId> allocateVirtualDisplay(uint32_t width, uint32_t height,
                                                     ui::PixelFormat* format) override;
 
     // Called from SurfaceFlinger, when the state for a new physical display needs to be recreated.
-    void allocatePhysicalDisplay(hwc2_display_t hwcDisplayId, DisplayId displayId) override;
+    void allocatePhysicalDisplay(hal::HWDisplayId hwcDisplayId, DisplayId displayId) override;
 
     // Attempts to create a new layer on this display
     HWC2::Layer* createLayer(DisplayId displayId) override;
@@ -260,7 +263,7 @@
     status_t presentAndGetReleaseFences(DisplayId displayId) override;
 
     // set power mode
-    status_t setPowerMode(DisplayId displayId, int mode) override;
+    status_t setPowerMode(DisplayId displayId, hal::PowerMode mode) override;
 
     // Sets a color transform to be applied to the result of composition
     status_t setColorTransform(DisplayId displayId, const mat4& transform) override;
@@ -308,11 +311,11 @@
 
     // Returns stable display ID (and display name on connection of new or previously disconnected
     // display), or std::nullopt if hotplug event was ignored.
-    std::optional<DisplayIdentificationInfo> onHotplug(hwc2_display_t hwcDisplayId,
-                                                       HWC2::Connection connection) override;
+    std::optional<DisplayIdentificationInfo> onHotplug(hal::HWDisplayId hwcDisplayId,
+                                                       hal::Connection connection) override;
 
-    bool onVsync(hwc2_display_t hwcDisplayId, int64_t timestamp) override;
-    void setVsyncEnabled(DisplayId displayId, HWC2::Vsync enabled) override;
+    bool onVsync(hal::HWDisplayId hwcDisplayId, int64_t timestamp) override;
+    void setVsyncEnabled(DisplayId displayId, hal::Vsync enabled) override;
 
     nsecs_t getRefreshTimestamp(DisplayId displayId) const override;
     bool isConnected(DisplayId displayId) const override;
@@ -337,12 +340,11 @@
     bool isVsyncPeriodSwitchSupported(DisplayId displayId) const override;
     nsecs_t getDisplayVsyncPeriod(DisplayId displayId) const override;
     status_t setActiveConfigWithConstraints(DisplayId displayId, size_t configId,
-                                            const HWC2::VsyncPeriodChangeConstraints& constraints,
-                                            HWC2::VsyncPeriodChangeTimeline* outTimeline) override;
+                                            const hal::VsyncPeriodChangeConstraints& constraints,
+                                            hal::VsyncPeriodChangeTimeline* outTimeline) override;
     status_t setAutoLowLatencyMode(DisplayId displayId, bool) override;
-    status_t getSupportedContentTypes(DisplayId displayId,
-                                      std::vector<HWC2::ContentType>*) override;
-    status_t setContentType(DisplayId displayId, HWC2::ContentType) override;
+    status_t getSupportedContentTypes(DisplayId displayId, std::vector<hal::ContentType>*) override;
+    status_t setContentType(DisplayId displayId, hal::ContentType) override;
 
     const std::unordered_map<std::string, bool>& getSupportedLayerGenericMetadata() const override;
 
@@ -352,23 +354,23 @@
     Hwc2::Composer* getComposer() const override { return mComposer.get(); }
 
     // TODO(b/74619554): Remove special cases for internal/external display.
-    std::optional<hwc2_display_t> getInternalHwcDisplayId() const override {
+    std::optional<hal::HWDisplayId> getInternalHwcDisplayId() const override {
         return mInternalHwcDisplayId;
     }
-    std::optional<hwc2_display_t> getExternalHwcDisplayId() const override {
+    std::optional<hal::HWDisplayId> getExternalHwcDisplayId() const override {
         return mExternalHwcDisplayId;
     }
 
-    std::optional<DisplayId> toPhysicalDisplayId(hwc2_display_t hwcDisplayId) const override;
-    std::optional<hwc2_display_t> fromPhysicalDisplayId(DisplayId displayId) const override;
+    std::optional<DisplayId> toPhysicalDisplayId(hal::HWDisplayId hwcDisplayId) const override;
+    std::optional<hal::HWDisplayId> fromPhysicalDisplayId(DisplayId displayId) const override;
 
 private:
     // For unit tests
     friend TestableSurfaceFlinger;
 
-    std::optional<DisplayIdentificationInfo> onHotplugConnect(hwc2_display_t hwcDisplayId);
-    std::optional<DisplayIdentificationInfo> onHotplugDisconnect(hwc2_display_t hwcDisplayId);
-    bool shouldIgnoreHotplugConnect(hwc2_display_t hwcDisplayId,
+    std::optional<DisplayIdentificationInfo> onHotplugConnect(hal::HWDisplayId hwcDisplayId);
+    std::optional<DisplayIdentificationInfo> onHotplugDisconnect(hal::HWDisplayId hwcDisplayId);
+    bool shouldIgnoreHotplugConnect(hal::HWDisplayId hwcDisplayId,
                                     bool hasDisplayIdentificationData) const;
 
     void loadCapabilities();
@@ -386,12 +388,12 @@
                 std::shared_ptr<const HWC2::Display::Config>> configMap;
 
         bool validateWasSkipped;
-        HWC2::Error presentError;
+        hal::Error presentError;
 
         bool vsyncTraceToggle = false;
 
         std::mutex vsyncEnabledLock;
-        HWC2::Vsync vsyncEnabled GUARDED_BY(vsyncEnabledLock) = HWC2::Vsync::Disable;
+        hal::Vsync vsyncEnabled GUARDED_BY(vsyncEnabledLock) = hal::Vsync::DISABLE;
 
         mutable std::mutex lastHwVsyncLock;
         nsecs_t lastHwVsync GUARDED_BY(lastHwVsyncLock) = 0;
@@ -400,13 +402,13 @@
     std::unordered_map<DisplayId, DisplayData> mDisplayData;
 
     std::unique_ptr<android::Hwc2::Composer> mComposer;
-    std::unordered_set<HWC2::Capability> mCapabilities;
+    std::unordered_set<hal::Capability> mCapabilities;
     std::unordered_map<std::string, bool> mSupportedLayerGenericMetadata;
     bool mRegisteredCallback = false;
 
-    std::unordered_map<hwc2_display_t, DisplayId> mPhysicalDisplayIdMap;
-    std::optional<hwc2_display_t> mInternalHwcDisplayId;
-    std::optional<hwc2_display_t> mExternalHwcDisplayId;
+    std::unordered_map<hal::HWDisplayId, DisplayId> mPhysicalDisplayIdMap;
+    std::optional<hal::HWDisplayId> mInternalHwcDisplayId;
+    std::optional<hal::HWDisplayId> mExternalHwcDisplayId;
     bool mHasMultiDisplaySupport = false;
 
     std::unordered_set<DisplayId> mFreeVirtualDisplayIds;
diff --git a/services/surfaceflinger/DisplayHardware/Hal.h b/services/surfaceflinger/DisplayHardware/Hal.h
new file mode 100644
index 0000000..66ee425
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/Hal.h
@@ -0,0 +1,168 @@
+/*
+ * Copyright 2020 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/hardware/graphics/common/1.1/types.h>
+#include <android/hardware/graphics/composer/2.4/IComposer.h>
+#include <android/hardware/graphics/composer/2.4/IComposerClient.h>
+
+#define ERROR_HAS_CHANGES 5
+
+namespace android {
+namespace hardware::graphics::composer::hal {
+
+namespace types = android::hardware::graphics::common;
+namespace V2_1 = android::hardware::graphics::composer::V2_1;
+namespace V2_2 = android::hardware::graphics::composer::V2_2;
+namespace V2_3 = android::hardware::graphics::composer::V2_3;
+namespace V2_4 = android::hardware::graphics::composer::V2_4;
+
+using types::V1_0::ColorTransform;
+using types::V1_0::Transform;
+using types::V1_1::RenderIntent;
+using types::V1_2::ColorMode;
+using types::V1_2::Dataspace;
+using types::V1_2::Hdr;
+using types::V1_2::PixelFormat;
+
+using V2_1::Error;
+using V2_4::IComposer;
+using V2_4::IComposerCallback;
+using V2_4::IComposerClient;
+using V2_4::VsyncPeriodChangeTimeline;
+using V2_4::VsyncPeriodNanos;
+
+using Attribute = IComposerClient::Attribute;
+using BlendMode = IComposerClient::BlendMode;
+using Color = IComposerClient::Color;
+using Composition = IComposerClient::Composition;
+using Connection = IComposerCallback::Connection;
+using ContentType = IComposerClient::ContentType;
+using Capability = IComposer::Capability;
+using DisplayCapability = IComposerClient::DisplayCapability;
+using DisplayRequest = IComposerClient::DisplayRequest;
+using DisplayType = IComposerClient::DisplayType;
+using HWConfigId = V2_1::Config;
+using HWDisplayId = V2_1::Display;
+using HWError = V2_1::Error;
+using HWLayerId = V2_1::Layer;
+using LayerGenericMetadataKey = IComposerClient::LayerGenericMetadataKey;
+using LayerRequest = IComposerClient::LayerRequest;
+using PerFrameMetadata = IComposerClient::PerFrameMetadata;
+using PerFrameMetadataKey = IComposerClient::PerFrameMetadataKey;
+using PerFrameMetadataBlob = IComposerClient::PerFrameMetadataBlob;
+using PowerMode = IComposerClient::PowerMode;
+using Vsync = IComposerClient::Vsync;
+using VsyncPeriodChangeConstraints = IComposerClient::VsyncPeriodChangeConstraints;
+
+} // namespace hardware::graphics::composer::hal
+
+inline bool hasChangesError(hardware::graphics::composer::hal::Error error) {
+    return ERROR_HAS_CHANGES == static_cast<int32_t>(error);
+}
+
+inline std::string to_string(hardware::graphics::composer::hal::Attribute attribute) {
+    switch (attribute) {
+        case hardware::graphics::composer::hal::Attribute::INVALID:
+            return "Invalid";
+        case hardware::graphics::composer::hal::Attribute::WIDTH:
+            return "Width";
+        case hardware::graphics::composer::hal::Attribute::HEIGHT:
+            return "Height";
+        case hardware::graphics::composer::hal::Attribute::VSYNC_PERIOD:
+            return "VsyncPeriod";
+        case hardware::graphics::composer::hal::Attribute::DPI_X:
+            return "DpiX";
+        case hardware::graphics::composer::hal::Attribute::DPI_Y:
+            return "DpiY";
+        default:
+            return "Unknown";
+    }
+}
+
+inline std::string to_string(hardware::graphics::composer::hal::Composition composition) {
+    switch (composition) {
+        case hardware::graphics::composer::hal::Composition::INVALID:
+            return "Invalid";
+        case hardware::graphics::composer::hal::Composition::CLIENT:
+            return "Client";
+        case hardware::graphics::composer::hal::Composition::DEVICE:
+            return "Device";
+        case hardware::graphics::composer::hal::Composition::SOLID_COLOR:
+            return "SolidColor";
+        case hardware::graphics::composer::hal::Composition::CURSOR:
+            return "Cursor";
+        case hardware::graphics::composer::hal::Composition::SIDEBAND:
+            return "Sideband";
+        default:
+            return "Unknown";
+    }
+}
+
+inline std::string to_string(hardware::graphics::composer::hal::V2_4::Error error) {
+    // 5 is reserved for historical reason, during validation 5 means has changes.
+    if (ERROR_HAS_CHANGES == static_cast<int32_t>(error)) {
+        return "HasChanges";
+    }
+    switch (error) {
+        case hardware::graphics::composer::hal::V2_4::Error::NONE:
+            return "None";
+        case hardware::graphics::composer::hal::V2_4::Error::BAD_CONFIG:
+            return "BadConfig";
+        case hardware::graphics::composer::hal::V2_4::Error::BAD_DISPLAY:
+            return "BadDisplay";
+        case hardware::graphics::composer::hal::V2_4::Error::BAD_LAYER:
+            return "BadLayer";
+        case hardware::graphics::composer::hal::V2_4::Error::BAD_PARAMETER:
+            return "BadParameter";
+        case hardware::graphics::composer::hal::V2_4::Error::NO_RESOURCES:
+            return "NoResources";
+        case hardware::graphics::composer::hal::V2_4::Error::NOT_VALIDATED:
+            return "NotValidated";
+        case hardware::graphics::composer::hal::V2_4::Error::UNSUPPORTED:
+            return "Unsupported";
+        case hardware::graphics::composer::hal::V2_4::Error::SEAMLESS_NOT_ALLOWED:
+            return "SeamlessNotAllowed";
+        case hardware::graphics::composer::hal::V2_4::Error::SEAMLESS_NOT_POSSIBLE:
+            return "SeamlessNotPossible";
+        default:
+            return "Unknown";
+    }
+}
+
+inline std::string to_string(hardware::graphics::composer::hal::Error error) {
+    return to_string(static_cast<hardware::graphics::composer::hal::V2_4::Error>(error));
+}
+
+inline std::string to_string(hardware::graphics::composer::hal::PowerMode mode) {
+    switch (mode) {
+        case hardware::graphics::composer::hal::PowerMode::OFF:
+            return "Off";
+        case hardware::graphics::composer::hal::PowerMode::DOZE:
+            return "Doze";
+        case hardware::graphics::composer::hal::PowerMode::ON:
+            return "On";
+        case hardware::graphics::composer::hal::PowerMode::DOZE_SUSPEND:
+            return "DozeSuspend";
+        case hardware::graphics::composer::hal::PowerMode::ON_SUSPEND:
+            return "OnSuspend";
+        default:
+            return "Unknown";
+    }
+}
+
+} // namespace android
diff --git a/services/surfaceflinger/DisplayHardware/PowerAdvisor.h b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
index 4a90acb..34e63e7 100644
--- a/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
+++ b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
@@ -16,12 +16,6 @@
 
 #pragma once
 
-#define HWC2_INCLUDE_STRINGIFICATION
-#define HWC2_USE_CPP11
-#include <hardware/hwcomposer2.h>
-#undef HWC2_INCLUDE_STRINGIFICATION
-#undef HWC2_USE_CPP11
-
 #include <atomic>
 #include <unordered_set>
 
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 5039761..8452957 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -220,9 +220,6 @@
     }
 
     mFlinger->markLayerPendingRemovalLocked(this);
-    if (hasInput()) {
-        mFlinger->dirtyInput();
-    }
 }
 
 void Layer::onRemovedFromCurrentState() {
@@ -998,8 +995,6 @@
     mPendingStatesSnapshot = mPendingStates;
     mCurrentState.callbackHandles = {};
 
-    maybeDirtyInput();
-
     return flags;
 }
 
@@ -1384,6 +1379,9 @@
         return false;
     }
 
+    // Activate the layer in Scheduler's LayerHistory
+    mFlinger->mScheduler->recordLayerHistory(this, systemTime());
+
     mCurrentState.sequence++;
     mCurrentState.frameRate = frameRate;
     mCurrentState.modified = true;
@@ -2545,32 +2543,6 @@
     }
 }
 
-bool Layer::maybeDirtyInput() {
-    // No sense redirtying input.
-    if (mFlinger->inputDirty()) return true;
-
-    if (hasInput()) {
-        mFlinger->dirtyInput();
-        return true;
-    }
-
-    // If a child or relative dirties the input, no sense continuing to traverse
-    // so we return early and halt the recursion. We traverse ourselves instead
-    // of using traverse() so we can implement this early halt.
-    for (const sp<Layer>& child : mDrawingChildren) {
-        if (child->maybeDirtyInput()) {
-            return true;
-        }
-    }
-    for (const wp<Layer>& weakRelative : mDrawingState.zOrderRelatives) {
-        sp<Layer> relative = weakRelative.promote();
-        if (relative && relative->maybeDirtyInput()) {
-            return true;
-        }
-    }
-    return false;
-}
-
 // ---------------------------------------------------------------------------
 
 }; // namespace android
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 92ac015..6636b5e 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -1015,10 +1015,6 @@
     // Window types from WindowManager.LayoutParams
     const int mWindowType;
 
-    // Called when mDrawingState has changed. If we or one of our children/relatives hasInput()
-    // then we will dirty the setInputWindows cache.
-    bool maybeDirtyInput();
-
 private:
     /**
      * Returns an unsorted vector of all layers that are part of this tree.
diff --git a/services/surfaceflinger/MonitoredProducer.cpp b/services/surfaceflinger/MonitoredProducer.cpp
index 5009e10..18a2891 100644
--- a/services/surfaceflinger/MonitoredProducer.cpp
+++ b/services/surfaceflinger/MonitoredProducer.cpp
@@ -38,13 +38,7 @@
     // because we don't know where this destructor is called from. It could be
     // called with the mStateLock held, leading to a dead-lock (it actually
     // happens).
-    sp<LambdaMessage> cleanUpListMessage =
-            new LambdaMessage([flinger = mFlinger, asBinder = wp<IBinder>(onAsBinder())]() {
-                Mutex::Autolock lock(flinger->mStateLock);
-                flinger->mGraphicBufferProducerList.erase(asBinder);
-            });
-
-    mFlinger->postMessageAsync(cleanUpListMessage);
+    mFlinger->removeGraphicBufferProducerAsync(onAsBinder());
 }
 
 status_t MonitoredProducer::requestBuffer(int slot, sp<GraphicBuffer>* buf) {
diff --git a/services/surfaceflinger/Promise.h b/services/surfaceflinger/Promise.h
new file mode 100644
index 0000000..a80d441
--- /dev/null
+++ b/services/surfaceflinger/Promise.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2020 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 <future>
+#include <type_traits>
+#include <utility>
+
+namespace android::promise {
+namespace impl {
+
+template <typename T>
+struct FutureResult {
+    using Type = T;
+};
+
+template <typename T>
+struct FutureResult<std::future<T>> {
+    using Type = T;
+};
+
+} // namespace impl
+
+template <typename T>
+using FutureResult = typename impl::FutureResult<T>::Type;
+
+template <typename... Args>
+inline auto defer(Args... args) {
+    return std::async(std::launch::deferred, std::forward<Args>(args)...);
+}
+
+template <typename T>
+inline std::future<T> yield(T&& v) {
+    return defer([](T&& v) { return std::forward<T>(v); }, std::forward<T>(v));
+}
+
+template <typename T>
+struct Chain {
+    Chain(std::future<T>&& f) : future(std::move(f)) {}
+    operator std::future<T>&&() && { return std::move(future); }
+
+    T get() && { return future.get(); }
+
+    template <typename F, typename R = std::invoke_result_t<F, T>>
+    auto then(F&& op) && -> Chain<FutureResult<R>> {
+        return defer(
+                [](auto&& f, F&& op) {
+                    R r = op(f.get());
+                    if constexpr (std::is_same_v<R, FutureResult<R>>) {
+                        return r;
+                    } else {
+                        return r.get();
+                    }
+                },
+                std::move(future), std::forward<F>(op));
+    }
+
+    std::future<T> future;
+};
+
+template <typename T>
+inline Chain<T> chain(std::future<T>&& f) {
+    return std::move(f);
+}
+
+} // namespace android::promise
diff --git a/services/surfaceflinger/RefreshRateOverlay.cpp b/services/surfaceflinger/RefreshRateOverlay.cpp
index 0a0f2f1..2e7fbc1 100644
--- a/services/surfaceflinger/RefreshRateOverlay.cpp
+++ b/services/surfaceflinger/RefreshRateOverlay.cpp
@@ -116,9 +116,13 @@
 
     sp<GraphicBuffer> buffer =
             new GraphicBuffer(BUFFER_WIDTH, BUFFER_HEIGHT, HAL_PIXEL_FORMAT_RGBA_8888, 1,
-                              GRALLOC_USAGE_SW_WRITE_RARELY, "RefreshRateOverlayBuffer");
+                              GRALLOC_USAGE_SW_WRITE_RARELY | GRALLOC_USAGE_HW_COMPOSER |
+                                      GRALLOC_USAGE_HW_TEXTURE,
+                              "RefreshRateOverlayBuffer");
     uint8_t* pixels;
     buffer->lock(GRALLOC_USAGE_SW_WRITE_RARELY, reinterpret_cast<void**>(&pixels));
+    // Clear buffer content
+    drawRect(Rect(BUFFER_WIDTH, BUFFER_HEIGHT), half4(0), buffer, pixels);
     int left = 0;
     if (hundreds != 0) {
         drawDigit(hundreds, left, color, buffer, pixels);
diff --git a/services/surfaceflinger/RegionSamplingThread.cpp b/services/surfaceflinger/RegionSamplingThread.cpp
index 68cd84f..27353d8 100644
--- a/services/surfaceflinger/RegionSamplingThread.cpp
+++ b/services/surfaceflinger/RegionSamplingThread.cpp
@@ -130,7 +130,7 @@
         mVsyncListening = false;
     }
 
-    void onDispSyncEvent(nsecs_t /* when */) final {
+    void onDispSyncEvent(nsecs_t /*when*/, nsecs_t /*expectedVSyncTimestamp*/) final {
         std::unique_lock<decltype(mMutex)> lock(mMutex);
 
         if (mPhaseIntervalSetting == Phase::ZERO) {
@@ -199,13 +199,8 @@
     }
 }
 
-void RegionSamplingThread::addListener(const Rect& samplingArea, const sp<IBinder>& stopLayerHandle,
+void RegionSamplingThread::addListener(const Rect& samplingArea, const wp<Layer>& stopLayer,
                                        const sp<IRegionSamplingListener>& listener) {
-    wp<Layer> stopLayer;
-    if (stopLayerHandle != nullptr && stopLayerHandle->localBinder() != nullptr) {
-        stopLayer = static_cast<Layer::Handle*>(stopLayerHandle.get())->owner;
-    }
-
     sp<IBinder> asBinder = IInterface::asBinder(listener);
     asBinder->linkToDeath(this);
     std::lock_guard lock(mSamplingMutex);
@@ -430,7 +425,8 @@
     }
 
     bool ignored;
-    mFlinger.captureScreenCommon(renderArea, traverseLayers, buffer, false, ignored);
+    mFlinger.captureScreenCommon(renderArea, traverseLayers, buffer, false /* identityTransform */,
+                                 true /* regionSampling */, ignored);
 
     std::vector<Descriptor> activeDescriptors;
     for (const auto& descriptor : descriptors) {
diff --git a/services/surfaceflinger/RegionSamplingThread.h b/services/surfaceflinger/RegionSamplingThread.h
index 99c07c2..b9b7a3c 100644
--- a/services/surfaceflinger/RegionSamplingThread.h
+++ b/services/surfaceflinger/RegionSamplingThread.h
@@ -69,7 +69,7 @@
 
     // Add a listener to receive luma notifications. The luma reported via listener will
     // report the median luma for the layers under the stopLayerHandle, in the samplingArea region.
-    void addListener(const Rect& samplingArea, const sp<IBinder>& stopLayerHandle,
+    void addListener(const Rect& samplingArea, const wp<Layer>& stopLayer,
                      const sp<IRegionSamplingListener>& listener);
     // Remove the listener to stop receiving median luma notifications.
     void removeListener(const sp<IRegionSamplingListener>& listener);
diff --git a/services/surfaceflinger/Scheduler/DispSync.cpp b/services/surfaceflinger/Scheduler/DispSync.cpp
index 809a0e5..ff91bf7 100644
--- a/services/surfaceflinger/Scheduler/DispSync.cpp
+++ b/services/surfaceflinger/Scheduler/DispSync.cpp
@@ -200,7 +200,8 @@
                     }
                 }
 
-                callbackInvocations = gatherCallbackInvocationsLocked(now);
+                callbackInvocations =
+                        gatherCallbackInvocationsLocked(now, computeNextRefreshLocked(0, now));
             }
 
             if (callbackInvocations.size() > 0) {
@@ -303,6 +304,11 @@
         return BAD_VALUE;
     }
 
+    nsecs_t computeNextRefresh(int periodOffset, nsecs_t now) const {
+        Mutex::Autolock lock(mMutex);
+        return computeNextRefreshLocked(periodOffset, now);
+    }
+
 private:
     struct EventListener {
         const char* mName;
@@ -315,6 +321,7 @@
     struct CallbackInvocation {
         DispSync::Callback* mCallback;
         nsecs_t mEventTime;
+        nsecs_t mExpectedVSyncTime;
     };
 
     nsecs_t computeNextEventTimeLocked(nsecs_t now) {
@@ -340,7 +347,8 @@
         return duration < (3 * mPeriod) / 5;
     }
 
-    std::vector<CallbackInvocation> gatherCallbackInvocationsLocked(nsecs_t now) {
+    std::vector<CallbackInvocation> gatherCallbackInvocationsLocked(nsecs_t now,
+                                                                    nsecs_t expectedVSyncTime) {
         if (mTraceDetailedInfo) ATRACE_CALL();
         ALOGV("[%s] gatherCallbackInvocationsLocked @ %" PRId64, mName, ns2us(now));
 
@@ -361,6 +369,10 @@
                 CallbackInvocation ci;
                 ci.mCallback = eventListener.mCallback;
                 ci.mEventTime = t;
+                ci.mExpectedVSyncTime = expectedVSyncTime;
+                if (eventListener.mPhase < 0) {
+                    ci.mExpectedVSyncTime += mPeriod;
+                }
                 ALOGV("[%s] [%s] Preparing to fire, latency: %" PRId64, mName, eventListener.mName,
                       t - eventListener.mLastEventTime);
                 callbackInvocations.push_back(ci);
@@ -426,10 +438,19 @@
     void fireCallbackInvocations(const std::vector<CallbackInvocation>& callbacks) {
         if (mTraceDetailedInfo) ATRACE_CALL();
         for (size_t i = 0; i < callbacks.size(); i++) {
-            callbacks[i].mCallback->onDispSyncEvent(callbacks[i].mEventTime);
+            callbacks[i].mCallback->onDispSyncEvent(callbacks[i].mEventTime,
+                                                    callbacks[i].mExpectedVSyncTime);
         }
     }
 
+    nsecs_t computeNextRefreshLocked(int periodOffset, nsecs_t now) const {
+        nsecs_t phase = mReferenceTime + mPhase;
+        if (mPeriod == 0) {
+            return 0;
+        }
+        return (((now - phase) / mPeriod) + periodOffset + 1) * mPeriod + phase;
+    }
+
     const char* const mName;
 
     bool mStop;
@@ -444,7 +465,7 @@
 
     std::vector<EventListener> mEventListeners;
 
-    Mutex mMutex;
+    mutable Mutex mMutex;
     Condition mCond;
 
     // Flag to turn on logging in systrace.
@@ -458,7 +479,7 @@
 public:
     ZeroPhaseTracer() : mParity("ZERO_PHASE_VSYNC", false) {}
 
-    virtual void onDispSyncEvent(nsecs_t /*when*/) {
+    virtual void onDispSyncEvent(nsecs_t /*when*/, nsecs_t /*expectedVSyncTimestamp*/) {
         mParity = !mParity;
     }
 
@@ -768,9 +789,8 @@
     }
 }
 
-nsecs_t DispSync::computeNextRefresh(int periodOffset) const {
+nsecs_t DispSync::computeNextRefresh(int periodOffset, nsecs_t now) const {
     Mutex::Autolock lock(mMutex);
-    nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
     nsecs_t phase = mReferenceTime + mPhase;
     if (mPeriod == 0) {
         return 0;
@@ -837,7 +857,7 @@
     StringAppendF(&result, "current monotonic time: %" PRId64 "\n", now);
 }
 
-nsecs_t DispSync::expectedPresentTime() {
+nsecs_t DispSync::expectedPresentTime(nsecs_t now) {
     // The HWC doesn't currently have a way to report additional latency.
     // Assume that whatever we submit now will appear right after the flip.
     // For a smart panel this might be 1.  This is expressed in frames,
@@ -846,7 +866,7 @@
     const uint32_t hwcLatency = 0;
 
     // Ask DispSync when the next refresh will be (CLOCK_MONOTONIC).
-    return computeNextRefresh(hwcLatency);
+    return mThread->computeNextRefresh(hwcLatency, now);
 }
 
 } // namespace impl
diff --git a/services/surfaceflinger/Scheduler/DispSync.h b/services/surfaceflinger/Scheduler/DispSync.h
index 2d9afc9..832f08e 100644
--- a/services/surfaceflinger/Scheduler/DispSync.h
+++ b/services/surfaceflinger/Scheduler/DispSync.h
@@ -36,7 +36,7 @@
     public:
         Callback() = default;
         virtual ~Callback();
-        virtual void onDispSyncEvent(nsecs_t when) = 0;
+        virtual void onDispSyncEvent(nsecs_t when, nsecs_t expectedVSyncTimestamp) = 0;
 
     protected:
         Callback(Callback const&) = delete;
@@ -58,9 +58,9 @@
                                       nsecs_t lastCallbackTime) = 0;
     virtual status_t removeEventListener(Callback* callback, nsecs_t* outLastCallback) = 0;
     virtual status_t changePhaseOffset(Callback* callback, nsecs_t phase) = 0;
-    virtual nsecs_t computeNextRefresh(int periodOffset) const = 0;
+    virtual nsecs_t computeNextRefresh(int periodOffset, nsecs_t now) const = 0;
     virtual void setIgnorePresentFences(bool ignore) = 0;
-    virtual nsecs_t expectedPresentTime() = 0;
+    virtual nsecs_t expectedPresentTime(nsecs_t now) = 0;
 
     virtual void dump(std::string& result) const = 0;
 
@@ -167,7 +167,7 @@
     // The periodOffset value can be used to move forward or backward; an
     // offset of zero is the next refresh, -1 is the previous refresh, 1 is
     // the refresh after next. etc.
-    nsecs_t computeNextRefresh(int periodOffset) const override;
+    nsecs_t computeNextRefresh(int periodOffset, nsecs_t now) const override;
 
     // In certain situations the present fences aren't a good indicator of vsync
     // time, e.g. when vr flinger is active, or simply aren't available,
@@ -178,7 +178,7 @@
     void setIgnorePresentFences(bool ignore) override;
 
     // Determine the expected present time when a buffer acquired now will be displayed.
-    nsecs_t expectedPresentTime();
+    nsecs_t expectedPresentTime(nsecs_t now);
 
     // dump appends human-readable debug info to the result string.
     void dump(std::string& result) const override;
diff --git a/services/surfaceflinger/Scheduler/DispSyncSource.cpp b/services/surfaceflinger/Scheduler/DispSyncSource.cpp
index 4e3f85f..8752b66 100644
--- a/services/surfaceflinger/Scheduler/DispSyncSource.cpp
+++ b/services/surfaceflinger/Scheduler/DispSyncSource.cpp
@@ -92,7 +92,7 @@
     }
 }
 
-void DispSyncSource::onDispSyncEvent(nsecs_t when) {
+void DispSyncSource::onDispSyncEvent(nsecs_t when, nsecs_t expectedVSyncTimestamp) {
     VSyncSource::Callback* callback;
     {
         std::lock_guard lock(mCallbackMutex);
@@ -104,7 +104,7 @@
     }
 
     if (callback != nullptr) {
-        callback->onVSyncEvent(when);
+        callback->onVSyncEvent(when, expectedVSyncTimestamp);
     }
 }
 
diff --git a/services/surfaceflinger/Scheduler/DispSyncSource.h b/services/surfaceflinger/Scheduler/DispSyncSource.h
index f278712..2aee3f6 100644
--- a/services/surfaceflinger/Scheduler/DispSyncSource.h
+++ b/services/surfaceflinger/Scheduler/DispSyncSource.h
@@ -40,7 +40,7 @@
 
 private:
     // The following method is the implementation of the DispSync::Callback.
-    virtual void onDispSyncEvent(nsecs_t when);
+    void onDispSyncEvent(nsecs_t when, nsecs_t expectedVSyncTimestamp) override;
 
     const char* const mName;
     TracedOrdinal<int> mValue;
diff --git a/services/surfaceflinger/Scheduler/EventThread.cpp b/services/surfaceflinger/Scheduler/EventThread.cpp
index 8347650..5dedb6a 100644
--- a/services/surfaceflinger/Scheduler/EventThread.cpp
+++ b/services/surfaceflinger/Scheduler/EventThread.cpp
@@ -79,8 +79,9 @@
                                 event.hotplug.connected ? "connected" : "disconnected");
         case DisplayEventReceiver::DISPLAY_EVENT_VSYNC:
             return StringPrintf("VSync{displayId=%" ANDROID_PHYSICAL_DISPLAY_ID_FORMAT
-                                ", count=%u}",
-                                event.header.displayId, event.vsync.count);
+                                ", count=%u, expectedVSyncTimestamp=%" PRId64 "}",
+                                event.header.displayId, event.vsync.count,
+                                event.vsync.expectedVSyncTimestamp);
         case DisplayEventReceiver::DISPLAY_EVENT_CONFIG_CHANGED:
             return StringPrintf("ConfigChanged{displayId=%" ANDROID_PHYSICAL_DISPLAY_ID_FORMAT
                                 ", configId=%u}",
@@ -99,10 +100,11 @@
 }
 
 DisplayEventReceiver::Event makeVSync(PhysicalDisplayId displayId, nsecs_t timestamp,
-                                      uint32_t count) {
+                                      uint32_t count, nsecs_t expectedVSyncTimestamp) {
     DisplayEventReceiver::Event event;
     event.header = {DisplayEventReceiver::DISPLAY_EVENT_VSYNC, displayId, timestamp};
     event.vsync.count = count;
+    event.vsync.expectedVSyncTimestamp = expectedVSyncTimestamp;
     return event;
 }
 
@@ -312,11 +314,12 @@
     mCondition.notify_all();
 }
 
-void EventThread::onVSyncEvent(nsecs_t timestamp) {
+void EventThread::onVSyncEvent(nsecs_t timestamp, nsecs_t expectedVSyncTimestamp) {
     std::lock_guard<std::mutex> lock(mMutex);
 
     LOG_FATAL_IF(!mVSyncState);
-    mPendingEvents.push_back(makeVSync(mVSyncState->displayId, timestamp, ++mVSyncState->count));
+    mPendingEvents.push_back(makeVSync(mVSyncState->displayId, timestamp, ++mVSyncState->count,
+                                       expectedVSyncTimestamp));
     mCondition.notify_all();
 }
 
@@ -423,7 +426,8 @@
         } else {
             // Generate a fake VSYNC after a long timeout in case the driver stalls. When the
             // display is off, keep feeding clients at 60 Hz.
-            const auto timeout = mState == State::SyntheticVSync ? 16ms : 1000ms;
+            const std::chrono::nanoseconds timeout =
+                    mState == State::SyntheticVSync ? 16ms : 1000ms;
             if (mCondition.wait_for(lock, timeout) == std::cv_status::timeout) {
                 if (mState == State::VSync) {
                     ALOGW("Faking VSYNC due to driver stall for thread %s", mThreadName);
@@ -439,9 +443,10 @@
                 }
 
                 LOG_FATAL_IF(!mVSyncState);
-                mPendingEvents.push_back(makeVSync(mVSyncState->displayId,
-                                                   systemTime(SYSTEM_TIME_MONOTONIC),
-                                                   ++mVSyncState->count));
+                const auto now = systemTime(SYSTEM_TIME_MONOTONIC);
+                const auto expectedVSyncTime = now + timeout.count();
+                mPendingEvents.push_back(makeVSync(mVSyncState->displayId, now,
+                                                   ++mVSyncState->count, expectedVSyncTime));
             }
         }
     }
diff --git a/services/surfaceflinger/Scheduler/EventThread.h b/services/surfaceflinger/Scheduler/EventThread.h
index 98b1876..9e7086e 100644
--- a/services/surfaceflinger/Scheduler/EventThread.h
+++ b/services/surfaceflinger/Scheduler/EventThread.h
@@ -57,7 +57,7 @@
     class Callback {
     public:
         virtual ~Callback() {}
-        virtual void onVSyncEvent(nsecs_t when) = 0;
+        virtual void onVSyncEvent(nsecs_t when, nsecs_t expectedVSyncTimestamp) = 0;
     };
 
     virtual ~VSyncSource() {}
@@ -189,7 +189,7 @@
             REQUIRES(mMutex);
 
     // Implements VSyncSource::Callback
-    void onVSyncEvent(nsecs_t timestamp) override;
+    void onVSyncEvent(nsecs_t timestamp, nsecs_t expectedVSyncTimestamp) override;
 
     const std::unique_ptr<VSyncSource> mVSyncSource GUARDED_BY(mMutex);
 
diff --git a/services/surfaceflinger/Scheduler/InjectVSyncSource.h b/services/surfaceflinger/Scheduler/InjectVSyncSource.h
index 31da588..975c9db 100644
--- a/services/surfaceflinger/Scheduler/InjectVSyncSource.h
+++ b/services/surfaceflinger/Scheduler/InjectVSyncSource.h
@@ -35,10 +35,10 @@
         mCallback = callback;
     }
 
-    void onInjectSyncEvent(nsecs_t when) {
+    void onInjectSyncEvent(nsecs_t when, nsecs_t expectedVSyncTimestamp) {
         std::lock_guard<std::mutex> lock(mCallbackMutex);
         if (mCallback) {
-            mCallback->onVSyncEvent(when);
+            mCallback->onVSyncEvent(when, expectedVSyncTimestamp);
         }
     }
 
diff --git a/services/surfaceflinger/Scheduler/LayerHistoryV2.cpp b/services/surfaceflinger/Scheduler/LayerHistoryV2.cpp
index 8b08592..b067466 100644
--- a/services/surfaceflinger/Scheduler/LayerHistoryV2.cpp
+++ b/services/surfaceflinger/Scheduler/LayerHistoryV2.cpp
@@ -40,9 +40,11 @@
 namespace {
 
 bool isLayerActive(const Layer& layer, const LayerInfoV2& info, nsecs_t threshold) {
+    // Layers with an explicit vote are always kept active
     if (layer.getFrameRateForLayerTree().rate > 0) {
-        return layer.isVisible();
+        return true;
     }
+
     return layer.isVisible() && info.getLastUpdatedTime() >= threshold;
 }
 
@@ -127,29 +129,24 @@
         //  an additional parameter.
         ALOGV("Layer has priority: %d", strong->getFrameRateSelectionPriority());
 
-        const bool recent = info->isRecentlyActive(now);
-        if (recent) {
-            const auto [type, refreshRate] = info->getRefreshRate(now);
-            // Skip NoVote layer as those don't have any requirements
-            if (type == LayerHistory::LayerVoteType::NoVote) {
-                continue;
-            }
+        const auto [type, refreshRate] = info->getRefreshRate(now);
+        // Skip NoVote layer as those don't have any requirements
+        if (type == LayerHistory::LayerVoteType::NoVote) {
+            continue;
+        }
 
-            // Compute the layer's position on the screen
-            const Rect bounds = Rect(strong->getBounds());
-            const ui::Transform transform = strong->getTransform();
-            constexpr bool roundOutwards = true;
-            Rect transformed = transform.transform(bounds, roundOutwards);
+        // Compute the layer's position on the screen
+        const Rect bounds = Rect(strong->getBounds());
+        const ui::Transform transform = strong->getTransform();
+        constexpr bool roundOutwards = true;
+        Rect transformed = transform.transform(bounds, roundOutwards);
 
-            const float layerArea = transformed.getWidth() * transformed.getHeight();
-            float weight = mDisplayArea ? layerArea / mDisplayArea : 0.0f;
-            summary.push_back({strong->getName(), type, refreshRate, weight});
+        const float layerArea = transformed.getWidth() * transformed.getHeight();
+        float weight = mDisplayArea ? layerArea / mDisplayArea : 0.0f;
+        summary.push_back({strong->getName(), type, refreshRate, weight});
 
-            if (CC_UNLIKELY(mTraceEnabled)) {
-                trace(layer, type, static_cast<int>(std::round(refreshRate)));
-            }
-        } else if (CC_UNLIKELY(mTraceEnabled)) {
-            trace(layer, LayerHistory::LayerVoteType::NoVote, 0);
+        if (CC_UNLIKELY(mTraceEnabled)) {
+            trace(layer, type, static_cast<int>(std::round(refreshRate)));
         }
     }
 
@@ -177,7 +174,7 @@
                         return LayerVoteType::NoVote;
                 }
             }();
-            if (frameRate.rate > 0 || voteType == LayerVoteType::NoVote) {
+            if (layer->isVisible() && (frameRate.rate > 0 || voteType == LayerVoteType::NoVote)) {
                 info->setLayerVote(voteType, frameRate.rate);
             } else {
                 info->resetLayerVote();
diff --git a/services/surfaceflinger/Scheduler/LayerInfoV2.cpp b/services/surfaceflinger/Scheduler/LayerInfoV2.cpp
index b4365bf..bf1fb88 100644
--- a/services/surfaceflinger/Scheduler/LayerInfoV2.cpp
+++ b/services/surfaceflinger/Scheduler/LayerInfoV2.cpp
@@ -45,15 +45,6 @@
     }
 }
 
-// Returns whether the earliest present time is within the active threshold.
-bool LayerInfoV2::isRecentlyActive(nsecs_t now) const {
-    if (mFrameTimes.empty()) {
-        return false;
-    }
-
-    return mFrameTimes.back().queueTime >= getActiveLayerThreshold(now);
-}
-
 bool LayerInfoV2::isFrameTimeValid(const FrameTimeData& frameTime) const {
     return frameTime.queueTime >= std::chrono::duration_cast<std::chrono::nanoseconds>(
                                           mFrameTimeValidSince.time_since_epoch())
diff --git a/services/surfaceflinger/Scheduler/LayerInfoV2.h b/services/surfaceflinger/Scheduler/LayerInfoV2.h
index 25fb95a..ad91f18 100644
--- a/services/surfaceflinger/Scheduler/LayerInfoV2.h
+++ b/services/surfaceflinger/Scheduler/LayerInfoV2.h
@@ -64,8 +64,6 @@
     // updated time, the updated time is the present time.
     void setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now);
 
-    bool isRecentlyActive(nsecs_t now) const;
-
     // Sets an explicit layer vote. This usually comes directly from the application via
     // ANativeWindow_setFrameRate API
     void setLayerVote(LayerHistory::LayerVoteType type, float fps) { mLayerVote = {type, fps}; }
diff --git a/services/surfaceflinger/Scheduler/MessageQueue.cpp b/services/surfaceflinger/Scheduler/MessageQueue.cpp
index 005d157..6067e69 100644
--- a/services/surfaceflinger/Scheduler/MessageQueue.cpp
+++ b/services/surfaceflinger/Scheduler/MessageQueue.cpp
@@ -18,10 +18,6 @@
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wconversion"
 
-#include <errno.h>
-#include <stdint.h>
-#include <sys/types.h>
-
 #include <binder/IPCThreadState.h>
 
 #include <utils/Log.h>
@@ -35,26 +31,7 @@
 #include "MessageQueue.h"
 #include "SurfaceFlinger.h"
 
-namespace android {
-
-// ---------------------------------------------------------------------------
-
-MessageBase::MessageBase() : MessageHandler() {}
-
-MessageBase::~MessageBase() {}
-
-void MessageBase::handleMessage(const Message&) {
-    this->handler();
-    barrier.open();
-};
-
-// ---------------------------------------------------------------------------
-
-MessageQueue::~MessageQueue() = default;
-
-// ---------------------------------------------------------------------------
-
-namespace impl {
+namespace android::impl {
 
 void MessageQueue::Handler::dispatchRefresh() {
     if ((android_atomic_or(eventMaskRefresh, &mEventMask) & eventMaskRefresh) == 0) {
@@ -62,8 +39,9 @@
     }
 }
 
-void MessageQueue::Handler::dispatchInvalidate() {
+void MessageQueue::Handler::dispatchInvalidate(nsecs_t expectedVSyncTimestamp) {
     if ((android_atomic_or(eventMaskInvalidate, &mEventMask) & eventMaskInvalidate) == 0) {
+        mExpectedVSyncTime = expectedVSyncTimestamp;
         mQueue.mLooper->sendMessage(this, Message(MessageQueue::INVALIDATE));
     }
 }
@@ -72,11 +50,11 @@
     switch (message.what) {
         case INVALIDATE:
             android_atomic_and(~eventMaskInvalidate, &mEventMask);
-            mQueue.mFlinger->onMessageReceived(message.what);
+            mQueue.mFlinger->onMessageReceived(message.what, mExpectedVSyncTime);
             break;
         case REFRESH:
             android_atomic_and(~eventMaskRefresh, &mEventMask);
-            mQueue.mFlinger->onMessageReceived(message.what);
+            mQueue.mFlinger->onMessageReceived(message.what, mExpectedVSyncTime);
             break;
     }
 }
@@ -122,14 +100,8 @@
     } while (true);
 }
 
-status_t MessageQueue::postMessage(const sp<MessageBase>& messageHandler, nsecs_t relTime) {
-    const Message dummyMessage;
-    if (relTime > 0) {
-        mLooper->sendMessageDelayed(relTime, messageHandler, dummyMessage);
-    } else {
-        mLooper->sendMessage(messageHandler, dummyMessage);
-    }
-    return NO_ERROR;
+void MessageQueue::postMessage(sp<MessageHandler>&& handler) {
+    mLooper->sendMessage(handler, Message());
 }
 
 void MessageQueue::invalidate() {
@@ -151,7 +123,7 @@
     while ((n = DisplayEventReceiver::getEvents(&mEventTube, buffer, 8)) > 0) {
         for (int i = 0; i < n; i++) {
             if (buffer[i].header.type == DisplayEventReceiver::DISPLAY_EVENT_VSYNC) {
-                mHandler->dispatchInvalidate();
+                mHandler->dispatchInvalidate(buffer[i].vsync.expectedVSyncTimestamp);
                 break;
             }
         }
@@ -159,10 +131,7 @@
     return 1;
 }
 
-// ---------------------------------------------------------------------------
-
-} // namespace impl
-} // namespace android
+} // namespace android::impl
 
 // TODO(b/129481165): remove the #pragma below and fix conversion issues
 #pragma clang diagnostic pop // ignored "-Wconversion"
diff --git a/services/surfaceflinger/Scheduler/MessageQueue.h b/services/surfaceflinger/Scheduler/MessageQueue.h
index fcfc4aa..132b416 100644
--- a/services/surfaceflinger/Scheduler/MessageQueue.h
+++ b/services/surfaceflinger/Scheduler/MessageQueue.h
@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
-#ifndef ANDROID_MESSAGE_QUEUE_H
-#define ANDROID_MESSAGE_QUEUE_H
+#pragma once
 
-#include <errno.h>
-#include <stdint.h>
-#include <sys/types.h>
+#include <cstdint>
+#include <future>
+#include <type_traits>
+#include <utility>
 
 #include <utils/Looper.h>
 #include <utils/Timers.h>
@@ -28,52 +28,30 @@
 #include <gui/IDisplayEventConnection.h>
 #include <private/gui/BitTube.h>
 
-#include "Barrier.h"
 #include "EventThread.h"
 
-#include <functional>
-
 namespace android {
 
 class SurfaceFlinger;
 
-// ---------------------------------------------------------------------------
+template <typename F>
+class Task : public MessageHandler {
+    template <typename G>
+    friend auto makeTask(G&&);
 
-class MessageBase : public MessageHandler {
-public:
-    MessageBase();
+    explicit Task(F&& f) : mTask(std::move(f)) {}
 
-    // return true if message has a handler
-    virtual bool handler() = 0;
+    void handleMessage(const Message&) override { mTask(); }
 
-    // waits for the handler to be processed
-    void wait() const { barrier.wait(); }
-
-protected:
-    virtual ~MessageBase();
-
-private:
-    virtual void handleMessage(const Message& message);
-
-    mutable Barrier barrier;
+    using T = std::invoke_result_t<F>;
+    std::packaged_task<T()> mTask;
 };
 
-class LambdaMessage : public MessageBase {
-public:
-    explicit LambdaMessage(std::function<void()> handler)
-          : MessageBase(), mHandler(std::move(handler)) {}
-
-    bool handler() override {
-        mHandler();
-        // This return value is no longer checked, so it's always safe to return true
-        return true;
-    }
-
-private:
-    const std::function<void()> mHandler;
-};
-
-// ---------------------------------------------------------------------------
+template <typename F>
+inline auto makeTask(F&& f) {
+    sp<Task<F>> task = new Task<F>(std::move(f));
+    return std::make_pair(task, task->mTask.get_future());
+}
 
 class MessageQueue {
 public:
@@ -82,12 +60,12 @@
         REFRESH = 1,
     };
 
-    virtual ~MessageQueue();
+    virtual ~MessageQueue() = default;
 
     virtual void init(const sp<SurfaceFlinger>& flinger) = 0;
     virtual void setEventConnection(const sp<EventThreadConnection>& connection) = 0;
     virtual void waitMessage() = 0;
-    virtual status_t postMessage(const sp<MessageBase>& message, nsecs_t reltime = 0) = 0;
+    virtual void postMessage(sp<MessageHandler>&&) = 0;
     virtual void invalidate() = 0;
     virtual void refresh() = 0;
 };
@@ -101,12 +79,13 @@
         enum { eventMaskInvalidate = 0x1, eventMaskRefresh = 0x2, eventMaskTransaction = 0x4 };
         MessageQueue& mQueue;
         int32_t mEventMask;
+        std::atomic<nsecs_t> mExpectedVSyncTime;
 
     public:
         explicit Handler(MessageQueue& queue) : mQueue(queue), mEventMask(0) {}
         virtual void handleMessage(const Message& message);
         void dispatchRefresh();
-        void dispatchInvalidate();
+        void dispatchInvalidate(nsecs_t expectedVSyncTimestamp);
     };
 
     friend class Handler;
@@ -126,7 +105,7 @@
     void setEventConnection(const sp<EventThreadConnection>& connection) override;
 
     void waitMessage() override;
-    status_t postMessage(const sp<MessageBase>& message, nsecs_t reltime = 0) override;
+    void postMessage(sp<MessageHandler>&&) override;
 
     // sends INVALIDATE message at next VSYNC
     void invalidate() override;
@@ -135,9 +114,5 @@
     void refresh() override;
 };
 
-// ---------------------------------------------------------------------------
-
 } // namespace impl
 } // namespace android
-
-#endif /* ANDROID_MESSAGE_QUEUE_H */
diff --git a/services/surfaceflinger/Scheduler/PhaseOffsets.cpp b/services/surfaceflinger/Scheduler/PhaseOffsets.cpp
index d9aaa05..fe2e406 100644
--- a/services/surfaceflinger/Scheduler/PhaseOffsets.cpp
+++ b/services/surfaceflinger/Scheduler/PhaseOffsets.cpp
@@ -60,6 +60,12 @@
 PhaseOffsets::PhaseOffsets(const scheduler::RefreshRateConfigs& refreshRateConfigs)
       : PhaseOffsets(getRefreshRatesFromConfigs(refreshRateConfigs),
                      refreshRateConfigs.getCurrentRefreshRate().getFps(),
+                     sysprop::vsync_event_phase_offset_ns(1000000),
+                     sysprop::vsync_sf_event_phase_offset_ns(1000000),
+                     getProperty("debug.sf.early_phase_offset_ns"),
+                     getProperty("debug.sf.early_gl_phase_offset_ns"),
+                     getProperty("debug.sf.early_app_phase_offset_ns"),
+                     getProperty("debug.sf.early_gl_app_phase_offset_ns"),
                      // Below defines the threshold when an offset is considered to be negative,
                      // i.e. targeting for the N+2 vsync instead of N+1. This means that: For offset
                      // < threshold, SF wake up (vsync_duration - offset) before HW vsync. For
@@ -69,8 +75,18 @@
                              .value_or(std::numeric_limits<nsecs_t>::max())) {}
 
 PhaseOffsets::PhaseOffsets(const std::vector<float>& refreshRates, float currentFps,
-                           nsecs_t thresholdForNextVsync)
-      : mThresholdForNextVsync(thresholdForNextVsync),
+                           nsecs_t vsyncPhaseOffsetNs, nsecs_t sfVSyncPhaseOffsetNs,
+                           std::optional<nsecs_t> earlySfOffsetNs,
+                           std::optional<nsecs_t> earlyGlSfOffsetNs,
+                           std::optional<nsecs_t> earlyAppOffsetNs,
+                           std::optional<nsecs_t> earlyGlAppOffsetNs, nsecs_t thresholdForNextVsync)
+      : mVSyncPhaseOffsetNs(vsyncPhaseOffsetNs),
+        mSfVSyncPhaseOffsetNs(sfVSyncPhaseOffsetNs),
+        mEarlySfOffsetNs(earlySfOffsetNs),
+        mEarlyGlSfOffsetNs(earlyGlSfOffsetNs),
+        mEarlyAppOffsetNs(earlyAppOffsetNs),
+        mEarlyGlAppOffsetNs(earlyGlAppOffsetNs),
+        mThresholdForNextVsync(thresholdForNextVsync),
         mOffsets(initializeOffsets(refreshRates)),
         mRefreshRateFps(currentFps) {}
 
@@ -106,35 +122,27 @@
 }
 
 PhaseOffsets::Offsets PhaseOffsets::getDefaultOffsets(nsecs_t vsyncDuration) const {
-    const int64_t vsyncPhaseOffsetNs = sysprop::vsync_event_phase_offset_ns(1000000);
-    const int64_t sfVsyncPhaseOffsetNs = sysprop::vsync_sf_event_phase_offset_ns(1000000);
-
-    const auto earlySfOffsetNs = getProperty("debug.sf.early_phase_offset_ns");
-    const auto earlyGlSfOffsetNs = getProperty("debug.sf.early_gl_phase_offset_ns");
-    const auto earlyAppOffsetNs = getProperty("debug.sf.early_app_phase_offset_ns");
-    const auto earlyGlAppOffsetNs = getProperty("debug.sf.early_gl_app_phase_offset_ns");
-
     return {
             {
-                    earlySfOffsetNs.value_or(sfVsyncPhaseOffsetNs) < mThresholdForNextVsync
-                            ? earlySfOffsetNs.value_or(sfVsyncPhaseOffsetNs)
-                            : earlySfOffsetNs.value_or(sfVsyncPhaseOffsetNs) - vsyncDuration,
+                    mEarlySfOffsetNs.value_or(mSfVSyncPhaseOffsetNs) < mThresholdForNextVsync
+                            ? mEarlySfOffsetNs.value_or(mSfVSyncPhaseOffsetNs)
+                            : mEarlySfOffsetNs.value_or(mSfVSyncPhaseOffsetNs) - vsyncDuration,
 
-                    earlyAppOffsetNs.value_or(vsyncPhaseOffsetNs),
+                    mEarlyAppOffsetNs.value_or(mVSyncPhaseOffsetNs),
             },
             {
-                    earlyGlSfOffsetNs.value_or(sfVsyncPhaseOffsetNs) < mThresholdForNextVsync
-                            ? earlyGlSfOffsetNs.value_or(sfVsyncPhaseOffsetNs)
-                            : earlyGlSfOffsetNs.value_or(sfVsyncPhaseOffsetNs) - vsyncDuration,
+                    mEarlyGlSfOffsetNs.value_or(mSfVSyncPhaseOffsetNs) < mThresholdForNextVsync
+                            ? mEarlyGlSfOffsetNs.value_or(mSfVSyncPhaseOffsetNs)
+                            : mEarlyGlSfOffsetNs.value_or(mSfVSyncPhaseOffsetNs) - vsyncDuration,
 
-                    earlyGlAppOffsetNs.value_or(vsyncPhaseOffsetNs),
+                    mEarlyGlAppOffsetNs.value_or(mVSyncPhaseOffsetNs),
             },
             {
-                    sfVsyncPhaseOffsetNs < mThresholdForNextVsync
-                            ? sfVsyncPhaseOffsetNs
-                            : sfVsyncPhaseOffsetNs - vsyncDuration,
+                    mSfVSyncPhaseOffsetNs < mThresholdForNextVsync
+                            ? mSfVSyncPhaseOffsetNs
+                            : mSfVSyncPhaseOffsetNs - vsyncDuration,
 
-                    vsyncPhaseOffsetNs,
+                    mVSyncPhaseOffsetNs,
             },
     };
 }
diff --git a/services/surfaceflinger/Scheduler/PhaseOffsets.h b/services/surfaceflinger/Scheduler/PhaseOffsets.h
index fa8011d..9ec6d56 100644
--- a/services/surfaceflinger/Scheduler/PhaseOffsets.h
+++ b/services/surfaceflinger/Scheduler/PhaseOffsets.h
@@ -69,6 +69,9 @@
 protected:
     // Used for unit tests
     PhaseOffsets(const std::vector<float>& refreshRates, float currentFps,
+                 nsecs_t vsyncPhaseOffsetNs, nsecs_t sfVSyncPhaseOffsetNs,
+                 std::optional<nsecs_t> earlySfOffsetNs, std::optional<nsecs_t> earlyGlSfOffsetNs,
+                 std::optional<nsecs_t> earlyAppOffsetNs, std::optional<nsecs_t> earlyGlAppOffsetNs,
                  nsecs_t thresholdForNextVsync);
     std::unordered_map<float, Offsets> initializeOffsets(
             const std::vector<float>& refreshRates) const;
@@ -76,6 +79,12 @@
     Offsets getHighFpsOffsets(nsecs_t vsyncPeriod) const;
     Offsets getPhaseOffsets(float fps, nsecs_t vsyncPeriod) const;
 
+    const nsecs_t mVSyncPhaseOffsetNs;
+    const nsecs_t mSfVSyncPhaseOffsetNs;
+    const std::optional<nsecs_t> mEarlySfOffsetNs;
+    const std::optional<nsecs_t> mEarlyGlSfOffsetNs;
+    const std::optional<nsecs_t> mEarlyAppOffsetNs;
+    const std::optional<nsecs_t> mEarlyGlAppOffsetNs;
     const nsecs_t mThresholdForNextVsync;
     const std::unordered_map<float, Offsets> mOffsets;
 
diff --git a/services/surfaceflinger/Scheduler/RefreshRateStats.h b/services/surfaceflinger/Scheduler/RefreshRateStats.h
index 66d4a03..d9e7b37 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateStats.h
+++ b/services/surfaceflinger/Scheduler/RefreshRateStats.h
@@ -41,14 +41,15 @@
 
 public:
     RefreshRateStats(const RefreshRateConfigs& refreshRateConfigs, TimeStats& timeStats,
-                     HwcConfigIndexType currentConfigId, int currentPowerMode)
+                     HwcConfigIndexType currentConfigId,
+                     android::hardware::graphics::composer::hal::PowerMode currentPowerMode)
           : mRefreshRateConfigs(refreshRateConfigs),
             mTimeStats(timeStats),
             mCurrentConfigMode(currentConfigId),
             mCurrentPowerMode(currentPowerMode) {}
 
     // Sets power mode.
-    void setPowerMode(int mode) {
+    void setPowerMode(android::hardware::graphics::composer::hal::PowerMode mode) {
         if (mCurrentPowerMode == mode) {
             return;
         }
@@ -108,7 +109,7 @@
         mPreviousRecordedTime = currentTime;
 
         uint32_t fps = 0;
-        if (mCurrentPowerMode == HWC_POWER_MODE_NORMAL) {
+        if (mCurrentPowerMode == android::hardware::graphics::composer::hal::PowerMode::ON) {
             // Normal power mode is counted under different config modes.
             if (mConfigModesTotalTime.find(mCurrentConfigMode) == mConfigModesTotalTime.end()) {
                 mConfigModesTotalTime[mCurrentConfigMode] = 0;
@@ -140,7 +141,7 @@
     TimeStats& mTimeStats;
 
     HwcConfigIndexType mCurrentConfigMode;
-    int32_t mCurrentPowerMode;
+    android::hardware::graphics::composer::hal::PowerMode mCurrentPowerMode;
 
     std::unordered_map<HwcConfigIndexType /* configId */, int64_t /* duration in ms */>
             mConfigModesTotalTime;
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 9a9523f..86bb6eb 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -250,7 +250,7 @@
 }
 
 void Scheduler::getDisplayStatInfo(DisplayStatInfo* stats) {
-    stats->vsyncTime = mPrimaryDispSync->computeNextRefresh(0);
+    stats->vsyncTime = mPrimaryDispSync->computeNextRefresh(0, systemTime());
     stats->vsyncPeriod = mPrimaryDispSync->getPeriod();
 }
 
@@ -276,12 +276,12 @@
     return mInjectorConnectionHandle;
 }
 
-bool Scheduler::injectVSync(nsecs_t when) {
+bool Scheduler::injectVSync(nsecs_t when, nsecs_t expectedVSyncTime) {
     if (!mInjectVSyncs || !mVSyncInjector) {
         return false;
     }
 
-    mVSyncInjector->onInjectSyncEvent(when);
+    mVSyncInjector->onInjectSyncEvent(when, expectedVSyncTime);
     return true;
 }
 
@@ -378,8 +378,8 @@
     mPrimaryDispSync->setIgnorePresentFences(ignore);
 }
 
-nsecs_t Scheduler::getDispSyncExpectedPresentTime() {
-    return mPrimaryDispSync->expectedPresentTime();
+nsecs_t Scheduler::getDispSyncExpectedPresentTime(nsecs_t now) {
+    return mPrimaryDispSync->expectedPresentTime(now);
 }
 
 void Scheduler::registerLayer(Layer* layer) {
@@ -634,7 +634,7 @@
     return mFeatures.configId;
 }
 
-void Scheduler::onNewVsyncPeriodChangeTimeline(const HWC2::VsyncPeriodChangeTimeline& timeline) {
+void Scheduler::onNewVsyncPeriodChangeTimeline(const hal::VsyncPeriodChangeTimeline& timeline) {
     if (timeline.refreshRequired) {
         mSchedulerCallback.repaintEverythingForHWC();
     }
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 04cc96a..4a0280f 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -95,7 +95,7 @@
     ConnectionHandle enableVSyncInjection(bool enable);
 
     // Returns false if injection is disabled.
-    bool injectVSync(nsecs_t when);
+    bool injectVSync(nsecs_t when, nsecs_t expectedVSyncTime);
 
     void enableHardwareVsync();
     void disableHardwareVsync(bool makeUnavailable);
@@ -114,7 +114,7 @@
                          bool* periodFlushed);
     void addPresentFence(const std::shared_ptr<FenceTime>&);
     void setIgnorePresentFences(bool ignore);
-    nsecs_t getDispSyncExpectedPresentTime();
+    nsecs_t getDispSyncExpectedPresentTime(nsecs_t now);
 
     // Layers are registered on creation, and unregistered when the weak reference expires.
     void registerLayer(Layer*);
@@ -138,7 +138,7 @@
     std::optional<HwcConfigIndexType> getPreferredConfigId();
 
     // Notifies the scheduler about a refresh rate timeline change.
-    void onNewVsyncPeriodChangeTimeline(const HWC2::VsyncPeriodChangeTimeline& timeline);
+    void onNewVsyncPeriodChangeTimeline(const hal::VsyncPeriodChangeTimeline& timeline);
 
     // Notifies the scheduler when the display was refreshed
     void onDisplayRefreshed(nsecs_t timestamp);
@@ -242,7 +242,7 @@
     const scheduler::RefreshRateConfigs& mRefreshRateConfigs;
 
     std::mutex mVsyncTimelineLock;
-    std::optional<HWC2::VsyncPeriodChangeTimeline> mLastVsyncPeriodChangeTimeline
+    std::optional<hal::VsyncPeriodChangeTimeline> mLastVsyncPeriodChangeTimeline
             GUARDED_BY(mVsyncTimelineLock);
     static constexpr std::chrono::nanoseconds MAX_VSYNC_APPLIED_TIME = 200ms;
 
diff --git a/services/surfaceflinger/Scheduler/VSyncReactor.cpp b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
index 892ae62..5f0c9ce 100644
--- a/services/surfaceflinger/Scheduler/VSyncReactor.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
@@ -128,7 +128,7 @@
             mLastCallTime = vsynctime;
         }
 
-        mCallback->onDispSyncEvent(wakeupTime);
+        mCallback->onDispSyncEvent(wakeupTime, vsynctime);
 
         {
             std::lock_guard<std::mutex> lk(mMutex);
@@ -221,14 +221,13 @@
     }
 }
 
-nsecs_t VSyncReactor::computeNextRefresh(int periodOffset) const {
-    auto const now = mClock->now();
+nsecs_t VSyncReactor::computeNextRefresh(int periodOffset, nsecs_t now) const {
     auto const currentPeriod = periodOffset ? mTracker->currentPeriod() : 0;
     return mTracker->nextAnticipatedVSyncTimeFrom(now + periodOffset * currentPeriod);
 }
 
-nsecs_t VSyncReactor::expectedPresentTime() {
-    return mTracker->nextAnticipatedVSyncTimeFrom(mClock->now());
+nsecs_t VSyncReactor::expectedPresentTime(nsecs_t now) {
+    return mTracker->nextAnticipatedVSyncTimeFrom(now);
 }
 
 void VSyncReactor::startPeriodTransition(nsecs_t newPeriod) {
diff --git a/services/surfaceflinger/Scheduler/VSyncReactor.h b/services/surfaceflinger/Scheduler/VSyncReactor.h
index 5ee29f8..31ddf5a 100644
--- a/services/surfaceflinger/Scheduler/VSyncReactor.h
+++ b/services/surfaceflinger/Scheduler/VSyncReactor.h
@@ -42,8 +42,8 @@
     bool addPresentFence(const std::shared_ptr<FenceTime>& fence) final;
     void setIgnorePresentFences(bool ignoration) final;
 
-    nsecs_t computeNextRefresh(int periodOffset) const final;
-    nsecs_t expectedPresentTime() final;
+    nsecs_t computeNextRefresh(int periodOffset, nsecs_t now) const final;
+    nsecs_t expectedPresentTime(nsecs_t now) final;
 
     void setPeriod(nsecs_t period) final;
     nsecs_t getPeriod() final;
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index ddf0775..2943499 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -140,6 +140,8 @@
 using ui::Hdr;
 using ui::RenderIntent;
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 namespace {
 
 #pragma clang diagnostic push
@@ -169,19 +171,22 @@
 
 #pragma clang diagnostic pop
 
-class ConditionalLock {
-public:
-    ConditionalLock(Mutex& mutex, bool lock) : mMutex(mutex), mLocked(lock) {
-        if (lock) {
-            mMutex.lock();
-        }
+template <typename Mutex>
+struct ConditionalLockGuard {
+    ConditionalLockGuard(Mutex& mutex, bool lock) : mutex(mutex), lock(lock) {
+        if (lock) mutex.lock();
     }
-    ~ConditionalLock() { if (mLocked) mMutex.unlock(); }
-private:
-    Mutex& mMutex;
-    bool mLocked;
+
+    ~ConditionalLockGuard() {
+        if (lock) mutex.unlock();
+    }
+
+    Mutex& mutex;
+    const bool lock;
 };
 
+using ConditionalLock = ConditionalLockGuard<Mutex>;
+
 // TODO(b/141333600): Consolidate with HWC2::Display::Config::Builder::getDefaultDensity.
 constexpr float FALLBACK_DENSITY = ACONFIGURATION_DENSITY_TV / 160.f;
 
@@ -405,15 +410,13 @@
     useFrameRateApi = use_frame_rate_api(true);
 }
 
-void SurfaceFlinger::onFirstRef()
-{
+SurfaceFlinger::~SurfaceFlinger() = default;
+
+void SurfaceFlinger::onFirstRef() {
     mEventQueue->init(this);
 }
 
-SurfaceFlinger::~SurfaceFlinger() = default;
-
-void SurfaceFlinger::binderDied(const wp<IBinder>& /* who */)
-{
+void SurfaceFlinger::binderDied(const wp<IBinder>&) {
     // the window manager died on us. prepare its eulogy.
     mBootFinished = false;
 
@@ -424,21 +427,25 @@
     startBootAnim();
 }
 
-static sp<ISurfaceComposerClient> initClient(const sp<Client>& client) {
-    status_t err = client->initCheck();
-    if (err == NO_ERROR) {
-        return client;
+void SurfaceFlinger::run() {
+    while (true) {
+        mEventQueue->waitMessage();
     }
-    return nullptr;
+}
+
+template <typename F, typename T>
+inline std::future<T> SurfaceFlinger::schedule(F&& f) {
+    auto [task, future] = makeTask(std::move(f));
+    mEventQueue->postMessage(std::move(task));
+    return std::move(future);
 }
 
 sp<ISurfaceComposerClient> SurfaceFlinger::createConnection() {
-    return initClient(new Client(this));
+    const sp<Client> client = new Client(this);
+    return client->initCheck() == NO_ERROR ? client : nullptr;
 }
 
-sp<IBinder> SurfaceFlinger::createDisplay(const String8& displayName,
-        bool secure)
-{
+sp<IBinder> SurfaceFlinger::createDisplay(const String8& displayName, bool secure) {
     class DisplayToken : public BBinder {
         sp<SurfaceFlinger> flinger;
         virtual ~DisplayToken() {
@@ -574,7 +581,7 @@
     LOG_EVENT_LONG(LOGTAG_SF_STOP_BOOTANIM,
                    ns2ms(systemTime(SYSTEM_TIME_MONOTONIC)));
 
-    postMessageAsync(new LambdaMessage([this]() NO_THREAD_SAFETY_ANALYSIS {
+    static_cast<void>(schedule([this]() NO_THREAD_SAFETY_ANALYSIS {
         readPersistentProperties();
         mPowerAdvisor.onBootFinished();
         mBootStage = BootStage::FINISHED;
@@ -602,9 +609,12 @@
 
     // The pool was empty, so we need to get a new texture name directly using a
     // blocking call to the main thread
-    uint32_t name = 0;
-    postMessageSync(new LambdaMessage([&]() { getRenderEngine().genTextures(1, &name); }));
-    return name;
+    return schedule([this] {
+               uint32_t name = 0;
+               getRenderEngine().genTextures(1, &name);
+               return name;
+           })
+            .get();
 }
 
 void SurfaceFlinger::deleteTextureAsync(uint32_t texture) {
@@ -658,7 +668,7 @@
             // mStateLock from the vr flinger dispatch thread might trigger a
             // deadlock in surface flinger (see b/66916578), so post a message
             // to be handled on the main thread instead.
-            postMessageAsync(new LambdaMessage([=] {
+            static_cast<void>(schedule([=] {
                 ALOGI("VR request display mode: requestDisplay=%d", requestDisplay);
                 mVrFlingerRequestsDisplay = requestDisplay;
                 signalTransaction();
@@ -689,7 +699,7 @@
     // Inform native graphics APIs whether the present timestamp is supported:
 
     const bool presentFenceReliable =
-            !getHwComposer().hasCapability(HWC2::Capability::PresentFenceIsNotReliable);
+            !getHwComposer().hasCapability(hal::Capability::PRESENT_FENCE_IS_NOT_RELIABLE);
     mStartPropertySetThread = getFactory().createStartPropertySetThread(presentFenceReliable);
 
     if (mStartPropertySetThread->Start() != NO_ERROR) {
@@ -767,8 +777,7 @@
     };
     ConditionalLock _l(mStateLock,
             std::this_thread::get_id() != mMainThreadId);
-    if (!getHwComposer().hasCapability(
-            HWC2::Capability::PresentFenceIsNotReliable)) {
+    if (!getHwComposer().hasCapability(hal::Capability::PRESENT_FENCE_IS_NOT_RELIABLE)) {
         outSupported->push_back(FrameEvent::DISPLAY_PRESENT);
     }
     return NO_ERROR;
@@ -981,29 +990,26 @@
         return BAD_VALUE;
     }
 
-    status_t result = NAME_NOT_FOUND;
-
-    postMessageSync(new LambdaMessage([&]() {
+    auto future = schedule([=]() -> status_t {
         const auto display = getDisplayDeviceLocked(displayToken);
         if (!display) {
             ALOGE("Attempt to set allowed display configs for invalid display token %p",
                   displayToken.get());
+            return NAME_NOT_FOUND;
         } else if (display->isVirtual()) {
             ALOGW("Attempt to set allowed display configs for virtual display");
-            result = INVALID_OPERATION;
+            return INVALID_OPERATION;
         } else {
-            HwcConfigIndexType config(mode);
-            const auto& refreshRate = mRefreshRateConfigs->getRefreshRateFromConfigId(config);
-            result = setDesiredDisplayConfigSpecsInternal(display,
-                                                          scheduler::RefreshRateConfigs::
-                                                                  Policy{config,
-                                                                         refreshRate.getFps(),
-                                                                         refreshRate.getFps()},
-                                                          /*overridePolicy=*/false);
-        }
-    }));
+            const HwcConfigIndexType config(mode);
+            const float fps = mRefreshRateConfigs->getRefreshRateFromConfigId(config).getFps();
+            const scheduler::RefreshRateConfigs::Policy policy{config, fps, fps};
+            constexpr bool kOverridePolicy = false;
 
-    return result;
+            return setDesiredDisplayConfigSpecsInternal(display, policy, kOverridePolicy);
+        }
+    });
+
+    return future.get();
 }
 
 void SurfaceFlinger::setActiveConfigInternal() {
@@ -1096,11 +1102,11 @@
     ATRACE_INT("ActiveConfigFPS_HWC", refreshRate.getFps());
 
     // TODO(b/142753666) use constrains
-    HWC2::VsyncPeriodChangeConstraints constraints;
+    hal::VsyncPeriodChangeConstraints constraints;
     constraints.desiredTimeNanos = systemTime();
     constraints.seamlessRequired = false;
 
-    HWC2::VsyncPeriodChangeTimeline outTimeline;
+    hal::VsyncPeriodChangeTimeline outTimeline;
     auto status =
             getHwComposer().setActiveConfigWithConstraints(*displayId,
                                                            mUpcomingActiveConfig.configId.value(),
@@ -1177,7 +1183,7 @@
 }
 
 status_t SurfaceFlinger::setActiveColorMode(const sp<IBinder>& displayToken, ColorMode mode) {
-    postMessageSync(new LambdaMessage([&] {
+    schedule([=] {
         Vector<ColorMode> modes;
         getDisplayColorModes(displayToken, &modes);
         bool exists = std::find(std::begin(modes), std::end(modes), mode) != std::end(modes);
@@ -1199,7 +1205,7 @@
                                                             RenderIntent::COLORIMETRIC,
                                                             Dataspace::UNKNOWN});
         }
-    }));
+    }).wait();
 
     return NO_ERROR;
 }
@@ -1216,13 +1222,14 @@
     if (!displayId) {
         return NAME_NOT_FOUND;
     }
-    *outSupport = getHwComposer().hasDisplayCapability(*displayId,
-                                                       HWC2::DisplayCapability::AutoLowLatencyMode);
+    *outSupport =
+            getHwComposer().hasDisplayCapability(*displayId,
+                                                 hal::DisplayCapability::AUTO_LOW_LATENCY_MODE);
     return NO_ERROR;
 }
 
 void SurfaceFlinger::setAutoLowLatencyMode(const sp<IBinder>& displayToken, bool on) {
-    postMessageAsync(new LambdaMessage([=] {
+    static_cast<void>(schedule([=] {
         if (const auto displayId = getPhysicalDisplayIdLocked(displayToken)) {
             getHwComposer().setAutoLowLatencyMode(*displayId, on);
         } else {
@@ -1244,18 +1251,18 @@
         return NAME_NOT_FOUND;
     }
 
-    std::vector<HWC2::ContentType> types;
+    std::vector<hal::ContentType> types;
     getHwComposer().getSupportedContentTypes(*displayId, &types);
 
     *outSupport = std::any_of(types.begin(), types.end(),
-                              [](auto type) { return type == HWC2::ContentType::Game; });
+                              [](auto type) { return type == hal::ContentType::GAME; });
     return NO_ERROR;
 }
 
 void SurfaceFlinger::setGameContentType(const sp<IBinder>& displayToken, bool on) {
-    postMessageAsync(new LambdaMessage([=] {
+    static_cast<void>(schedule([=] {
         if (const auto displayId = getPhysicalDisplayIdLocked(displayToken)) {
-            const auto type = on ? HWC2::ContentType::Game : HWC2::ContentType::None;
+            const auto type = on ? hal::ContentType::GAME : hal::ContentType::NONE;
             getHwComposer().setContentType(*displayId, type);
         } else {
             ALOGE("%s: Invalid display token %p", __FUNCTION__, displayToken.get());
@@ -1343,18 +1350,17 @@
 status_t SurfaceFlinger::setDisplayContentSamplingEnabled(const sp<IBinder>& displayToken,
                                                           bool enable, uint8_t componentMask,
                                                           uint64_t maxFrames) {
-    status_t result = NAME_NOT_FOUND;
-
-    postMessageSync(new LambdaMessage([&] {
-        if (const auto displayId = getPhysicalDisplayIdLocked(displayToken)) {
-            result = getHwComposer().setDisplayContentSamplingEnabled(*displayId, enable,
-                                                                      componentMask, maxFrames);
-        } else {
-            ALOGE("%s: Invalid display token %p", __FUNCTION__, displayToken.get());
-        }
-    }));
-
-    return result;
+    return schedule([=]() -> status_t {
+               if (const auto displayId = getPhysicalDisplayIdLocked(displayToken)) {
+                   return getHwComposer().setDisplayContentSamplingEnabled(*displayId, enable,
+                                                                           componentMask,
+                                                                           maxFrames);
+               } else {
+                   ALOGE("%s: Invalid display token %p", __FUNCTION__, displayToken.get());
+                   return NAME_NOT_FOUND;
+               }
+           })
+            .get();
 }
 
 status_t SurfaceFlinger::getDisplayedContentSample(const sp<IBinder>& displayToken,
@@ -1396,21 +1402,21 @@
 }
 
 status_t SurfaceFlinger::enableVSyncInjections(bool enable) {
-    postMessageSync(new LambdaMessage([&] {
+    schedule([=] {
         Mutex::Autolock lock(mStateLock);
 
         if (const auto handle = mScheduler->enableVSyncInjection(enable)) {
             mEventQueue->setEventConnection(
                     mScheduler->getEventConnection(enable ? handle : mSfConnectionHandle));
         }
-    }));
+    }).wait();
 
     return NO_ERROR;
 }
 
 status_t SurfaceFlinger::injectVSync(nsecs_t when) {
     Mutex::Autolock lock(mStateLock);
-    return mScheduler->injectVSync(when) ? NO_ERROR : BAD_VALUE;
+    return mScheduler->injectVSync(when, calculateExpectedPresentTime(when)) ? NO_ERROR : BAD_VALUE;
 }
 
 status_t SurfaceFlinger::getLayerDebugInfo(std::vector<LayerDebugInfo>* outLayers) const
@@ -1449,7 +1455,9 @@
     if (!listener || samplingArea == Rect::INVALID_RECT) {
         return BAD_VALUE;
     }
-    mRegionSamplingThread->addListener(samplingArea, stopLayerHandle, listener);
+
+    const wp<Layer> stopLayer = fromHandle(stopLayerHandle);
+    mRegionSamplingThread->addListener(samplingArea, stopLayer, listener);
     return NO_ERROR;
 }
 
@@ -1474,7 +1482,7 @@
         return NAME_NOT_FOUND;
     }
     *outSupport =
-            getHwComposer().hasDisplayCapability(*displayId, HWC2::DisplayCapability::Brightness);
+            getHwComposer().hasDisplayCapability(*displayId, hal::DisplayCapability::BRIGHTNESS);
     return NO_ERROR;
 }
 
@@ -1483,17 +1491,15 @@
         return BAD_VALUE;
     }
 
-    status_t result = NAME_NOT_FOUND;
-
-    postMessageSync(new LambdaMessage([&] {
-        if (const auto displayId = getPhysicalDisplayIdLocked(displayToken)) {
-            result = getHwComposer().setDisplayBrightness(*displayId, brightness);
-        } else {
-            ALOGE("%s: Invalid display token %p", __FUNCTION__, displayToken.get());
-        }
-    }));
-
-    return result;
+    return schedule([=]() -> status_t {
+               if (const auto displayId = getPhysicalDisplayIdLocked(displayToken)) {
+                   return getHwComposer().setDisplayBrightness(*displayId, brightness);
+               } else {
+                   ALOGE("%s: Invalid display token %p", __FUNCTION__, displayToken.get());
+                   return NAME_NOT_FOUND;
+               }
+           })
+            .get();
 }
 
 status_t SurfaceFlinger::notifyPowerHint(int32_t hintId) {
@@ -1516,12 +1522,6 @@
     return mScheduler->createDisplayEventConnection(handle, configChanged);
 }
 
-// ----------------------------------------------------------------------------
-
-void SurfaceFlinger::waitForEvent() {
-    mEventQueue->waitMessage();
-}
-
 void SurfaceFlinger::signalTransaction() {
     mScheduler->resetIdleTimer();
     mPowerAdvisor.notifyDisplayUpdateImminent();
@@ -1539,26 +1539,6 @@
     mEventQueue->refresh();
 }
 
-status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
-        nsecs_t reltime, uint32_t /* flags */) {
-    return mEventQueue->postMessage(msg, reltime);
-}
-
-status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
-        nsecs_t reltime, uint32_t /* flags */) {
-    status_t res = mEventQueue->postMessage(msg, reltime);
-    if (res == NO_ERROR) {
-        msg->wait();
-    }
-    return res;
-}
-
-void SurfaceFlinger::run() {
-    do {
-        waitForEvent();
-    } while (true);
-}
-
 nsecs_t SurfaceFlinger::getVsyncPeriod() const {
     const auto displayId = getInternalDisplayIdLocked();
     if (!displayId || !getHwComposer().isConnected(*displayId)) {
@@ -1568,9 +1548,9 @@
     return getHwComposer().getDisplayVsyncPeriod(*displayId);
 }
 
-void SurfaceFlinger::onVsyncReceived(int32_t sequenceId, hwc2_display_t hwcDisplayId,
+void SurfaceFlinger::onVsyncReceived(int32_t sequenceId, hal::HWDisplayId hwcDisplayId,
                                      int64_t timestamp,
-                                     std::optional<hwc2_vsync_period_t> vsyncPeriod) {
+                                     std::optional<hal::VsyncPeriodNanos> vsyncPeriod) {
     ATRACE_NAME("SF onVsync");
 
     Mutex::Autolock lock(mStateLock);
@@ -1622,10 +1602,10 @@
     setDesiredActiveConfig({refreshRate.getConfigId(), event});
 }
 
-void SurfaceFlinger::onHotplugReceived(int32_t sequenceId, hwc2_display_t hwcDisplayId,
-                                       HWC2::Connection connection) {
+void SurfaceFlinger::onHotplugReceived(int32_t sequenceId, hal::HWDisplayId hwcDisplayId,
+                                       hal::Connection connection) {
     ALOGV("%s(%d, %" PRIu64 ", %s)", __FUNCTION__, sequenceId, hwcDisplayId,
-          connection == HWC2::Connection::Connected ? "connected" : "disconnected");
+          connection == hal::Connection::CONNECTED ? "connected" : "disconnected");
 
     // Ignore events that do not have the right sequenceId.
     if (sequenceId != getBE().mComposerSequenceId) {
@@ -1649,8 +1629,8 @@
 }
 
 void SurfaceFlinger::onVsyncPeriodTimingChangedReceived(
-        int32_t sequenceId, hwc2_display_t /*display*/,
-        const hwc_vsync_period_change_timeline_t& updatedTimeline) {
+        int32_t sequenceId, hal::HWDisplayId /*display*/,
+        const hal::VsyncPeriodChangeTimeline& updatedTimeline) {
     Mutex::Autolock lock(mStateLock);
     if (sequenceId != getBE().mComposerSequenceId) {
         return;
@@ -1658,12 +1638,12 @@
     mScheduler->onNewVsyncPeriodChangeTimeline(updatedTimeline);
 }
 
-void SurfaceFlinger::onSeamlessPossible(int32_t /*sequenceId*/, hwc2_display_t /*display*/) {
+void SurfaceFlinger::onSeamlessPossible(int32_t /*sequenceId*/, hal::HWDisplayId /*display*/) {
     // TODO(b/142753666): use constraints when calling to setActiveConfigWithConstrains and
     // use this callback to know when to retry in case of SEAMLESS_NOT_POSSIBLE.
 }
 
-void SurfaceFlinger::onRefreshReceived(int sequenceId, hwc2_display_t /*hwcDisplayId*/) {
+void SurfaceFlinger::onRefreshReceived(int sequenceId, hal::HWDisplayId /*hwcDisplayId*/) {
     Mutex::Autolock lock(mStateLock);
     if (sequenceId != getBE().mComposerSequenceId) {
         return;
@@ -1676,14 +1656,14 @@
 
     // Enable / Disable HWVsync from the main thread to avoid race conditions with
     // display power state.
-    postMessageAsync(new LambdaMessage(
-            [=]() NO_THREAD_SAFETY_ANALYSIS { setPrimaryVsyncEnabledInternal(enabled); }));
+    static_cast<void>(
+            schedule([=]() NO_THREAD_SAFETY_ANALYSIS { setPrimaryVsyncEnabledInternal(enabled); }));
 }
 
 void SurfaceFlinger::setPrimaryVsyncEnabledInternal(bool enabled) {
     ATRACE_CALL();
 
-    mHWCVsyncPendingState = enabled ? HWC2::Vsync::Enable : HWC2::Vsync::Disable;
+    mHWCVsyncPendingState = enabled ? hal::Vsync::ENABLE : hal::Vsync::DISABLE;
 
     if (const auto displayId = getInternalDisplayIdLocked()) {
         sp<DisplayDevice> display = getDefaultDisplayDeviceLocked();
@@ -1726,7 +1706,7 @@
     sp<DisplayDevice> display = getDefaultDisplayDeviceLocked();
     LOG_ALWAYS_FATAL_IF(!display);
 
-    const int currentDisplayPowerMode = display->getPowerMode();
+    const hal::PowerMode currentDisplayPowerMode = display->getPowerMode();
 
     // Clear out all the output layers from the composition engine for all
     // displays before destroying the hardware composer interface. This ensures
@@ -1819,16 +1799,16 @@
     return fence->getSignalTime();
 }
 
-void SurfaceFlinger::populateExpectedPresentTime() {
+nsecs_t SurfaceFlinger::calculateExpectedPresentTime(nsecs_t now) const {
     DisplayStatInfo stats;
     mScheduler->getDisplayStatInfo(&stats);
-    const nsecs_t presentTime = mScheduler->getDispSyncExpectedPresentTime();
+    const nsecs_t presentTime = mScheduler->getDispSyncExpectedPresentTime(now);
     // Inflate the expected present time if we're targetting the next vsync.
-    mExpectedPresentTime.store(
-            mVSyncModulator->getOffsets().sf > 0 ? presentTime : presentTime + stats.vsyncPeriod);
+    return mVSyncModulator->getOffsets().sf > 0 ? presentTime : presentTime + stats.vsyncPeriod;
 }
 
-void SurfaceFlinger::onMessageReceived(int32_t what) NO_THREAD_SAFETY_ANALYSIS {
+void SurfaceFlinger::onMessageReceived(int32_t what,
+                                       nsecs_t expectedVSyncTime) NO_THREAD_SAFETY_ANALYSIS {
     ATRACE_CALL();
     switch (what) {
         case MessageQueue::INVALIDATE: {
@@ -1837,7 +1817,7 @@
             // value throughout this frame to make sure all layers are
             // seeing this same value.
             const nsecs_t lastExpectedPresentTime = mExpectedPresentTime.load();
-            populateExpectedPresentTime();
+            mExpectedPresentTime = expectedVSyncTime;
 
             // When Backpressure propagation is enabled we want to give a small grace period
             // for the present fence to fire instead of just giving up on this frame to handle cases
@@ -1928,7 +1908,7 @@
                 // power mode may operate at a different frame rate than is
                 // reported in their config, which causes noticeable (but less
                 // severe) jank.
-                if (displayDevice && displayDevice->getPowerMode() == HWC_POWER_MODE_NORMAL) {
+                if (displayDevice && displayDevice->getPowerMode() == hal::PowerMode::ON) {
                     const nsecs_t currentTime = systemTime();
                     const nsecs_t jankDuration = currentTime - mMissedFrameJankStart;
                     if (jankDuration > kMinJankyDuration && jankDuration < kMaxJankyDuration) {
@@ -1953,8 +1933,15 @@
             // potentially trigger a display handoff.
             updateVrFlinger();
 
+            if (mTracingEnabledChanged) {
+                mTracingEnabled = mTracing.isEnabled();
+                mTracingEnabledChanged = false;
+            }
+
             bool refreshNeeded;
-            withTracingLock([&]() {
+            {
+                ConditionalLockGuard<std::mutex> lock(mTracingLock, mTracingEnabled);
+
                 refreshNeeded = handleMessageTransaction();
                 refreshNeeded |= handleMessageInvalidate();
                 if (mTracingEnabled) {
@@ -1964,7 +1951,7 @@
                         mTracing.notifyLocked("visibleRegionsDirty");
                     }
                 }
-            });
+            }
 
             // Layers need to get updated (in the previous line) before we can use them for
             // choosing the refresh rate.
@@ -2084,6 +2071,8 @@
     postFrame();
     postComposition();
 
+    const bool prevFrameHadDeviceComposition = mHadDeviceComposition;
+
     mHadClientComposition =
             std::any_of(mDisplays.cbegin(), mDisplays.cend(), [](const auto& tokenDisplayPair) {
                 auto& displayDevice = tokenDisplayPair.second;
@@ -2101,6 +2090,11 @@
                 return displayDevice->getCompositionDisplay()->getState().reusedClientComposition;
             });
 
+    // Only report a strategy change if we move in and out of composition with hw overlays
+    if (prevFrameHadDeviceComposition != mHadDeviceComposition) {
+        mTimeStats->incrementCompositionStrategyChanges();
+    }
+
     mVSyncModulator->onRefreshed(mHadClientComposition);
 
     mLayersWithQueuedFrames.clear();
@@ -2249,7 +2243,7 @@
     mTransactionCompletedThread.sendCallbacks();
 
     if (displayDevice && displayDevice->isPrimary() &&
-        displayDevice->getPowerMode() == HWC_POWER_MODE_NORMAL && presentFenceTime->isValid()) {
+        displayDevice->getPowerMode() == hal::PowerMode::ON && presentFenceTime->isValid()) {
         mScheduler->addPresentFence(presentFenceTime);
     }
 
@@ -2311,6 +2305,9 @@
     }
     getBE().mLastSwapTime = currentTime;
 
+    // Cleanup any outstanding resources due to rendering a prior frame.
+    getRenderEngine().cleanupPostRender();
+
     {
         std::lock_guard lock(mTexturePoolMutex);
         if (mTexturePool.size() < mTexturePoolSize) {
@@ -2340,6 +2337,10 @@
     }
 }
 
+FloatRect SurfaceFlinger::getLayerClipBoundsForDisplay(const DisplayDevice& displayDevice) const {
+    return displayDevice.getViewport().toFloatRect();
+}
+
 void SurfaceFlinger::computeLayerBounds() {
     for (const auto& pair : mDisplays) {
         const auto& displayDevice = pair.second;
@@ -2350,7 +2351,7 @@
                 continue;
             }
 
-            layer->computeBounds(displayDevice->getViewport().toFloatRect(), ui::Transform(),
+            layer->computeBounds(getLayerClipBoundsForDisplay(*displayDevice), ui::Transform(),
                                  0.f /* shadowRadius */);
         }
     }
@@ -2408,7 +2409,7 @@
         const DisplayId displayId = info->id;
         const auto it = mPhysicalDisplayTokens.find(displayId);
 
-        if (event.connection == HWC2::Connection::Connected) {
+        if (event.connection == hal::Connection::CONNECTED) {
             if (it == mPhysicalDisplayTokens.end()) {
                 ALOGV("Creating display %s", to_string(displayId).c_str());
 
@@ -2512,7 +2513,7 @@
             isInternalDisplay ? internalDisplayOrientation : ui::ROTATION_0;
 
     // virtual displays are always considered enabled
-    creationArgs.initialPowerMode = state.isVirtual() ? HWC_POWER_MODE_NORMAL : HWC_POWER_MODE_OFF;
+    creationArgs.initialPowerMode = state.isVirtual() ? hal::PowerMode::ON : hal::PowerMode::OFF;
 
     sp<DisplayDevice> display = getFactory().createDisplayDevice(creationArgs);
 
@@ -2878,19 +2879,6 @@
 void SurfaceFlinger::updateInputWindowInfo() {
     std::vector<InputWindowInfo> inputHandles;
 
-    // We use a simple caching algorithm here. mInputDirty begins as true,
-    // after we call setInputWindows we set it to false, so
-    // in the future we wont call it again.. We set input dirty to true again
-    // when any layer that hasInput() has a transaction performed on it
-    // or when any parent or relative parent of such a layer has a transaction
-    // performed on it. Not all of these transactions will really result in
-    // input changes but all input changes will spring from these transactions
-    // so the cache is safe but not optimal. It seems like it might be annoyingly
-    // costly to cache and comapre the actual InputWindowHandle vector though.
-    if (!mInputDirty && !mInputWindowCommands.syncInputWindows) {
-        return;
-    }
-
     mDrawingState.traverseInReverseZOrder([&](Layer* layer) {
         if (layer->hasInput()) {
             // When calculating the screen bounds we ignore the transparent region since it may
@@ -2902,8 +2890,6 @@
     mInputFlinger->setInputWindows(inputHandles,
                                    mInputWindowCommands.syncInputWindows ? mSetInputWindowsListener
                                                                          : nullptr);
-
-    mInputDirty = false;
 }
 
 void SurfaceFlinger::commitInputWindowCommands() {
@@ -2948,7 +2934,7 @@
                                                             currentConfig);
     mRefreshRateStats =
             std::make_unique<scheduler::RefreshRateStats>(*mRefreshRateConfigs, *mTimeStats,
-                                                          currentConfig, HWC_POWER_MODE_OFF);
+                                                          currentConfig, hal::PowerMode::OFF);
     mRefreshRateStats->setConfigMode(currentConfig);
 
     mPhaseConfiguration = getFactory().createPhaseConfiguration(*mRefreshRateConfigs);
@@ -3037,26 +3023,6 @@
     mDrawingState.traverse([&](Layer* layer) { layer->updateMirrorInfo(); });
 }
 
-void SurfaceFlinger::withTracingLock(std::function<void()> lockedOperation) {
-    if (mTracingEnabledChanged) {
-        mTracingEnabled = mTracing.isEnabled();
-        mTracingEnabledChanged = false;
-    }
-
-    // Synchronize with Tracing thread
-    std::unique_lock<std::mutex> lock;
-    if (mTracingEnabled) {
-        lock = std::unique_lock<std::mutex>(mDrawingStateLock);
-    }
-
-    lockedOperation();
-
-    // Synchronize with Tracing thread
-    if (mTracingEnabled) {
-        lock.unlock();
-    }
-}
-
 void SurfaceFlinger::commitOffscreenLayers() {
     for (Layer* offscreenLayer : mOffscreenLayers) {
         offscreenLayer->traverse(LayerVector::StateSet::Drawing, [](Layer* layer) {
@@ -3173,7 +3139,7 @@
         Mutex::Autolock _l(mStateLock);
         sp<Layer> parent;
         if (parentHandle != nullptr) {
-            parent = fromHandle(parentHandle);
+            parent = fromHandleLocked(parentHandle).promote();
             if (parent == nullptr) {
                 return NAME_NOT_FOUND;
             }
@@ -3217,6 +3183,13 @@
     return NO_ERROR;
 }
 
+void SurfaceFlinger::removeGraphicBufferProducerAsync(const wp<IBinder>& binder) {
+    static_cast<void>(schedule([=] {
+        Mutex::Autolock lock(mStateLock);
+        mGraphicBufferProducerList.erase(binder);
+    }));
+}
+
 uint32_t SurfaceFlinger::peekTransactionFlags() {
     return mTransactionFlags;
 }
@@ -3255,7 +3228,6 @@
             while (!transactionQueue.empty()) {
                 const auto& transaction = transactionQueue.front();
                 if (!transactionIsReadyToBeApplied(transaction.desiredPresentTime,
-                                                   true /* useCachedExpectedPresentTime */,
                                                    transaction.states)) {
                     setTransactionFlags(eTransactionFlushNeeded);
                     break;
@@ -3287,10 +3259,7 @@
 
 
 bool SurfaceFlinger::transactionIsReadyToBeApplied(int64_t desiredPresentTime,
-                                                   bool useCachedExpectedPresentTime,
                                                    const Vector<ComposerState>& states) {
-    if (!useCachedExpectedPresentTime)
-        populateExpectedPresentTime();
 
     const nsecs_t expectedPresentTime = mExpectedPresentTime.load();
     // Do not present if the desiredPresentTime has not passed unless it is more than one second
@@ -3342,9 +3311,13 @@
         }
     }
 
+    const bool pendingTransactions = itr != mTransactionQueues.end();
     // Expected present time is computed and cached on invalidate, so it may be stale.
-    if (itr != mTransactionQueues.end() || !transactionIsReadyToBeApplied(
-            desiredPresentTime, false /* useCachedExpectedPresentTime */, states)) {
+    if (!pendingTransactions) {
+        mExpectedPresentTime = calculateExpectedPresentTime(systemTime());
+    }
+
+    if (pendingTransactions || !transactionIsReadyToBeApplied(desiredPresentTime, states)) {
         mTransactionQueues[applyToken].emplace(states, displays, flags, desiredPresentTime,
                                                uncacheBuffer, postTime, privileged,
                                                hasListenerCallbacks, listenerCallbacks);
@@ -3548,7 +3521,7 @@
 
     sp<Layer> layer = nullptr;
     if (s.surface) {
-        layer = fromHandle(s.surface);
+        layer = fromHandleLocked(s.surface).promote();
     } else {
         // The client may provide us a null handle. Treat it as if the layer was removed.
         ALOGW("Attempt to set client state with a null layer handle");
@@ -3864,7 +3837,7 @@
 
     {
         Mutex::Autolock _l(mStateLock);
-        mirrorFrom = fromHandle(mirrorFromHandle);
+        mirrorFrom = fromHandleLocked(mirrorFromHandle).promote();
         if (!mirrorFrom) {
             return NAME_NOT_FOUND;
         }
@@ -4127,7 +4100,7 @@
     setTransactionState(state, displays, 0, nullptr, mPendingInputWindowCommands, -1, {}, false,
                         {});
 
-    setPowerModeInternal(display, HWC_POWER_MODE_NORMAL);
+    setPowerModeInternal(display, hal::PowerMode::ON);
 
     const nsecs_t vsyncPeriod = getVsyncPeriod();
     mAnimFrameTracker.setDisplayRefreshPeriod(vsyncPeriod);
@@ -4140,18 +4113,17 @@
 
 void SurfaceFlinger::initializeDisplays() {
     // Async since we may be called from the main thread.
-    postMessageAsync(
-            new LambdaMessage([this]() NO_THREAD_SAFETY_ANALYSIS { onInitializeDisplays(); }));
+    static_cast<void>(schedule([this]() NO_THREAD_SAFETY_ANALYSIS { onInitializeDisplays(); }));
 }
 
-void SurfaceFlinger::setVsyncEnabledInHWC(DisplayId displayId, HWC2::Vsync enabled) {
+void SurfaceFlinger::setVsyncEnabledInHWC(DisplayId displayId, hal::Vsync enabled) {
     if (mHWCVsyncState != enabled) {
         getHwComposer().setVsyncEnabled(displayId, enabled);
         mHWCVsyncState = enabled;
     }
 }
 
-void SurfaceFlinger::setPowerModeInternal(const sp<DisplayDevice>& display, int mode) {
+void SurfaceFlinger::setPowerModeInternal(const sp<DisplayDevice>& display, hal::PowerMode mode) {
     if (display->isVirtual()) {
         ALOGE("%s: Invalid operation on virtual display", __FUNCTION__);
         return;
@@ -4162,7 +4134,7 @@
 
     ALOGD("Setting power mode %d on display %s", mode, to_string(*displayId).c_str());
 
-    int currentMode = display->getPowerMode();
+    const hal::PowerMode currentMode = display->getPowerMode();
     if (mode == currentMode) {
         return;
     }
@@ -4170,15 +4142,15 @@
     display->setPowerMode(mode);
 
     if (mInterceptor->isEnabled()) {
-        mInterceptor->savePowerModeUpdate(display->getSequenceId(), mode);
+        mInterceptor->savePowerModeUpdate(display->getSequenceId(), static_cast<int32_t>(mode));
     }
 
-    if (currentMode == HWC_POWER_MODE_OFF) {
+    if (currentMode == hal::PowerMode::OFF) {
         if (SurfaceFlinger::setSchedFifo(true) != NO_ERROR) {
             ALOGW("Couldn't set SCHED_FIFO on display on: %s\n", strerror(errno));
         }
         getHwComposer().setPowerMode(*displayId, mode);
-        if (display->isPrimary() && mode != HWC_POWER_MODE_DOZE_SUSPEND) {
+        if (display->isPrimary() && mode != hal::PowerMode::DOZE_SUSPEND) {
             setVsyncEnabledInHWC(*displayId, mHWCVsyncPendingState);
             mScheduler->onScreenAcquired(mAppConnectionHandle);
             mScheduler->resyncToHardwareVsync(true, getVsyncPeriod());
@@ -4187,31 +4159,30 @@
         mVisibleRegionsDirty = true;
         mHasPoweredOff = true;
         repaintEverything();
-    } else if (mode == HWC_POWER_MODE_OFF) {
+    } else if (mode == hal::PowerMode::OFF) {
         // Turn off the display
         if (SurfaceFlinger::setSchedFifo(false) != NO_ERROR) {
             ALOGW("Couldn't set SCHED_OTHER on display off: %s\n", strerror(errno));
         }
-        if (display->isPrimary() && currentMode != HWC_POWER_MODE_DOZE_SUSPEND) {
+        if (display->isPrimary() && currentMode != hal::PowerMode::DOZE_SUSPEND) {
             mScheduler->disableHardwareVsync(true);
             mScheduler->onScreenReleased(mAppConnectionHandle);
         }
 
         // Make sure HWVsync is disabled before turning off the display
-        setVsyncEnabledInHWC(*displayId, HWC2::Vsync::Disable);
+        setVsyncEnabledInHWC(*displayId, hal::Vsync::DISABLE);
 
         getHwComposer().setPowerMode(*displayId, mode);
         mVisibleRegionsDirty = true;
         // from this point on, SF will stop drawing on this display
-    } else if (mode == HWC_POWER_MODE_DOZE ||
-               mode == HWC_POWER_MODE_NORMAL) {
+    } else if (mode == hal::PowerMode::DOZE || mode == hal::PowerMode::ON) {
         // Update display while dozing
         getHwComposer().setPowerMode(*displayId, mode);
-        if (display->isPrimary() && currentMode == HWC_POWER_MODE_DOZE_SUSPEND) {
+        if (display->isPrimary() && currentMode == hal::PowerMode::DOZE_SUSPEND) {
             mScheduler->onScreenAcquired(mAppConnectionHandle);
             mScheduler->resyncToHardwareVsync(true, getVsyncPeriod());
         }
-    } else if (mode == HWC_POWER_MODE_DOZE_SUSPEND) {
+    } else if (mode == hal::PowerMode::DOZE_SUSPEND) {
         // Leave display going to doze
         if (display->isPrimary()) {
             mScheduler->disableHardwareVsync(true);
@@ -4226,14 +4197,14 @@
     if (display->isPrimary()) {
         mTimeStats->setPowerMode(mode);
         mRefreshRateStats->setPowerMode(mode);
-        mScheduler->setDisplayPowerState(mode == HWC_POWER_MODE_NORMAL);
+        mScheduler->setDisplayPowerState(mode == hal::PowerMode::ON);
     }
 
     ALOGD("Finished setting power mode %d on display %s", mode, to_string(*displayId).c_str());
 }
 
 void SurfaceFlinger::setPowerMode(const sp<IBinder>& displayToken, int mode) {
-    postMessageSync(new LambdaMessage([&]() NO_THREAD_SAFETY_ANALYSIS {
+    schedule([=]() NO_THREAD_SAFETY_ANALYSIS {
         const auto display = getDisplayDeviceLocked(displayToken);
         if (!display) {
             ALOGE("Attempt to set power mode %d for invalid display token %p", mode,
@@ -4241,13 +4212,11 @@
         } else if (display->isVirtual()) {
             ALOGW("Attempt to set power mode %d for virtual display", mode);
         } else {
-            setPowerModeInternal(display, mode);
+            setPowerModeInternal(display, static_cast<hal::PowerMode>(mode));
         }
-    }));
+    }).wait();
 }
 
-// ---------------------------------------------------------------------------
-
 status_t SurfaceFlinger::doDump(int fd, const DumpArgs& args,
                                 bool asProto) NO_THREAD_SAFETY_ANALYSIS {
     std::string result;
@@ -4401,11 +4370,19 @@
 
     scheduler::RefreshRateConfigs::Policy policy = mRefreshRateConfigs->getDisplayManagerPolicy();
     StringAppendF(&result,
-                  "DesiredDisplayConfigSpecs: default config ID: %d"
+                  "DesiredDisplayConfigSpecs (DisplayManager): default config ID: %d"
                   ", min: %.2f Hz, max: %.2f Hz",
                   policy.defaultConfig.value(), policy.minRefreshRate, policy.maxRefreshRate);
     StringAppendF(&result, "(config override by backdoor: %s)\n\n",
                   mDebugDisplayConfigSetByBackdoor ? "yes" : "no");
+    scheduler::RefreshRateConfigs::Policy currentPolicy = mRefreshRateConfigs->getCurrentPolicy();
+    if (currentPolicy != policy) {
+        StringAppendF(&result,
+                      "DesiredDisplayConfigSpecs (Override): default config ID: %d"
+                      ", min: %.2f Hz, max: %.2f Hz\n\n",
+                      currentPolicy.defaultConfig.value(), currentPolicy.minRefreshRate,
+                      currentPolicy.maxRefreshRate);
+    }
 
     mScheduler->dump(mAppConnectionHandle, result);
     mScheduler->getPrimaryDispSync().dump(result);
@@ -4526,7 +4503,7 @@
 
 void SurfaceFlinger::dumpRawDisplayIdentificationData(const DumpArgs& args,
                                                       std::string& result) const {
-    hwc2_display_t hwcDisplayId;
+    hal::HWDisplayId hwcDisplayId;
     uint8_t port;
     DisplayIdentificationData data;
 
@@ -4563,11 +4540,13 @@
     result.append("\n");
 }
 
-LayersProto SurfaceFlinger::dumpDrawingStateProto(
-        uint32_t traceFlags, const sp<const DisplayDevice>& displayDevice) const {
+LayersProto SurfaceFlinger::dumpDrawingStateProto(uint32_t traceFlags) const {
+    // If context is SurfaceTracing thread, mTracingLock blocks display transactions on main thread.
+    const auto display = getDefaultDisplayDeviceLocked();
+
     LayersProto layersProto;
     for (const sp<Layer>& layer : mDrawingState.layersSortedByZ) {
-        layer->writeToProto(layersProto, traceFlags, displayDevice);
+        layer->writeToProto(layersProto, traceFlags, display);
     }
 
     return layersProto;
@@ -4598,23 +4577,21 @@
 }
 
 LayersProto SurfaceFlinger::dumpProtoFromMainThread(uint32_t traceFlags) {
-    LayersProto layersProto;
-    postMessageSync(new LambdaMessage([&]() {
-        const auto& displayDevice = getDefaultDisplayDeviceLocked();
-        layersProto = dumpDrawingStateProto(traceFlags, displayDevice);
-    }));
-    return layersProto;
+    return schedule([=] { return dumpDrawingStateProto(traceFlags); }).get();
 }
 
 void SurfaceFlinger::dumpOffscreenLayers(std::string& result) {
     result.append("Offscreen Layers:\n");
-    postMessageSync(new LambdaMessage([&]() {
-        for (Layer* offscreenLayer : mOffscreenLayers) {
-            offscreenLayer->traverse(LayerVector::StateSet::Drawing, [&](Layer* layer) {
-                layer->dumpCallingUidPid(result);
-            });
-        }
-    }));
+    result.append(schedule([this] {
+                      std::string result;
+                      for (Layer* offscreenLayer : mOffscreenLayers) {
+                          offscreenLayer->traverse(LayerVector::StateSet::Drawing,
+                                                   [&](Layer* layer) {
+                                                       layer->dumpCallingUidPid(result);
+                                                   });
+                      }
+                      return result;
+                  }).get());
 }
 
 void SurfaceFlinger::dumpAllLocked(const DumpArgs& args, std::string& result) const {
@@ -4931,9 +4908,9 @@
         code == IBinder::SYSPROPS_TRANSACTION) {
         return OK;
     }
-    // Numbers from 1000 to 1034 are currently used for backdoors. The code
+    // Numbers from 1000 to 1036 are currently used for backdoors. The code
     // in onTransact verifies that the user is root, and has access to use SF.
-    if (code >= 1000 && code <= 1035) {
+    if (code >= 1000 && code <= 1036) {
         ALOGV("Accessing SurfaceFlinger through backdoor code: %u", code);
         return OK;
     }
@@ -5129,20 +5106,12 @@
                 n = data.readInt32();
                 if (n) {
                     ALOGD("LayerTracing enabled");
-                    Mutex::Autolock lock(mStateLock);
-                    mTracingEnabledChanged = true;
-                    mTracing.enable();
+                    mTracingEnabledChanged = mTracing.enable();
                     reply->writeInt32(NO_ERROR);
                 } else {
                     ALOGD("LayerTracing disabled");
-                    bool writeFile = false;
-                    {
-                        Mutex::Autolock lock(mStateLock);
-                        mTracingEnabledChanged = true;
-                        writeFile = mTracing.disable();
-                    }
-
-                    if (writeFile) {
+                    mTracingEnabledChanged = mTracing.disable();
+                    if (mTracingEnabledChanged) {
                         reply->writeInt32(mTracing.writeToFile());
                     } else {
                         reply->writeInt32(NO_ERROR);
@@ -5270,6 +5239,18 @@
                 }
                 return NO_ERROR;
             }
+            case 1036: {
+                if (data.readInt32() > 0) {
+                    status_t result =
+                            acquireFrameRateFlexibilityToken(&mDebugFrameRateFlexibilityToken);
+                    if (result != NO_ERROR) {
+                        return result;
+                    }
+                } else {
+                    mDebugFrameRateFlexibilityToken = nullptr;
+                }
+                return NO_ERROR;
+            }
         }
     }
     return err;
@@ -5293,7 +5274,7 @@
 
     // Update the overlay on the main thread to avoid race conditions with
     // mRefreshRateConfigs->getCurrentRefreshRate()
-    postMessageAsync(new LambdaMessage([this, expired]() NO_THREAD_SAFETY_ANALYSIS {
+    static_cast<void>(schedule([=]() NO_THREAD_SAFETY_ANALYSIS {
         if (mRefreshRateOverlay) {
             const auto kernelTimerEnabled = property_get_bool(KERNEL_IDLE_TIMER_PROP, false);
             const bool timerExpired = kernelTimerEnabled && expired;
@@ -5566,7 +5547,7 @@
     {
         Mutex::Autolock lock(mStateLock);
 
-        parent = fromHandle(layerHandleBinder);
+        parent = fromHandleLocked(layerHandleBinder).promote();
         if (parent == nullptr || parent->isRemovedFromCurrentState()) {
             ALOGE("captureLayers called with an invalid or removed parent");
             return NAME_NOT_FOUND;
@@ -5599,7 +5580,7 @@
         reqHeight = crop.height() * frameScale;
 
         for (const auto& handle : excludeHandles) {
-            sp<Layer> excludeLayer = fromHandle(handle);
+            sp<Layer> excludeLayer = fromHandleLocked(handle).promote();
             if (excludeLayer != nullptr) {
                 excludeLayers.emplace(excludeLayer);
             } else {
@@ -5669,68 +5650,41 @@
                                              usage, "screenshot");
 
     return captureScreenCommon(renderArea, traverseLayers, *outBuffer, useIdentityTransform,
-                               outCapturedSecureLayers);
+                               false /* regionSampling */, outCapturedSecureLayers);
 }
 
 status_t SurfaceFlinger::captureScreenCommon(RenderArea& renderArea,
                                              TraverseLayersFunction traverseLayers,
                                              const sp<GraphicBuffer>& buffer,
-                                             bool useIdentityTransform,
+                                             bool useIdentityTransform, bool regionSampling,
                                              bool& outCapturedSecureLayers) {
-    // This mutex protects syncFd and captureResult for communication of the return values from the
-    // main thread back to this Binder thread
-    std::mutex captureMutex;
-    std::condition_variable captureCondition;
-    std::unique_lock<std::mutex> captureLock(captureMutex);
-    int syncFd = -1;
-    std::optional<status_t> captureResult;
-
     const int uid = IPCThreadState::self()->getCallingUid();
     const bool forSystem = uid == AID_GRAPHICS || uid == AID_SYSTEM;
 
-    sp<LambdaMessage> message = new LambdaMessage([&] {
-        // If there is a refresh pending, bug out early and tell the binder thread to try again
-        // after the refresh.
-        if (mRefreshPending) {
-            ATRACE_NAME("Skipping screenshot for now");
-            std::unique_lock<std::mutex> captureLock(captureMutex);
-            captureResult = std::make_optional<status_t>(EAGAIN);
-            captureCondition.notify_one();
-            return;
-        }
+    status_t result;
+    int syncFd;
 
-        status_t result = NO_ERROR;
-        int fd = -1;
-        {
-            Mutex::Autolock _l(mStateLock);
-            renderArea.render([&] {
-                result = captureScreenImplLocked(renderArea, traverseLayers, buffer.get(),
-                                                 useIdentityTransform, forSystem, &fd,
-                                                 outCapturedSecureLayers);
-            });
-        }
+    do {
+        std::tie(result, syncFd) =
+                schedule([&] {
+                    if (mRefreshPending) {
+                        ATRACE_NAME("Skipping screenshot for now");
+                        return std::make_pair(EAGAIN, -1);
+                    }
 
-        {
-            std::unique_lock<std::mutex> captureLock(captureMutex);
-            syncFd = fd;
-            captureResult = std::make_optional<status_t>(result);
-            captureCondition.notify_one();
-        }
-    });
+                    status_t result = NO_ERROR;
+                    int fd = -1;
 
-    status_t result = postMessageAsync(message);
-    if (result == NO_ERROR) {
-        captureCondition.wait(captureLock, [&] { return captureResult; });
-        while (*captureResult == EAGAIN) {
-            captureResult.reset();
-            result = postMessageAsync(message);
-            if (result != NO_ERROR) {
-                return result;
-            }
-            captureCondition.wait(captureLock, [&] { return captureResult; });
-        }
-        result = *captureResult;
-    }
+                    Mutex::Autolock lock(mStateLock);
+                    renderArea.render([&] {
+                        result = captureScreenImplLocked(renderArea, traverseLayers, buffer.get(),
+                                                         useIdentityTransform, forSystem, &fd,
+                                                         regionSampling, outCapturedSecureLayers);
+                    });
+
+                    return std::make_pair(result, fd);
+                }).get();
+    } while (result == EAGAIN);
 
     if (result == NO_ERROR) {
         sync_wait(syncFd, -1);
@@ -5743,7 +5697,7 @@
 void SurfaceFlinger::renderScreenImplLocked(const RenderArea& renderArea,
                                             TraverseLayersFunction traverseLayers,
                                             ANativeWindowBuffer* buffer, bool useIdentityTransform,
-                                            int* outSyncFd) {
+                                            bool regionSampling, int* outSyncFd) {
     ATRACE_CALL();
 
     const auto reqWidth = renderArea.getReqWidth();
@@ -5799,6 +5753,12 @@
             for (auto& settings : results) {
                 settings.geometry.positionTransform =
                         transform.asMatrix4() * settings.geometry.positionTransform;
+                // There's no need to process blurs when we're executing region sampling,
+                // we're just trying to understand what we're drawing, and doing so without
+                // blurs is already a pretty good approximation.
+                if (regionSampling) {
+                    settings.backgroundBlurRadius = 0;
+                }
             }
             clientCompositionLayers.insert(clientCompositionLayers.end(),
                                            std::make_move_iterator(results.begin()),
@@ -5836,7 +5796,8 @@
                                                  TraverseLayersFunction traverseLayers,
                                                  ANativeWindowBuffer* buffer,
                                                  bool useIdentityTransform, bool forSystem,
-                                                 int* outSyncFd, bool& outCapturedSecureLayers) {
+                                                 int* outSyncFd, bool regionSampling,
+                                                 bool& outCapturedSecureLayers) {
     ATRACE_CALL();
 
     traverseLayers([&](Layer* layer) {
@@ -5851,7 +5812,8 @@
         ALOGW("FB is protected: PERMISSION_DENIED");
         return PERMISSION_DENIED;
     }
-    renderScreenImplLocked(renderArea, traverseLayers, buffer, useIdentityTransform, outSyncFd);
+    renderScreenImplLocked(renderArea, traverseLayers, buffer, useIdentityTransform, regionSampling,
+                           outSyncFd);
     return NO_ERROR;
 }
 
@@ -5915,11 +5877,11 @@
         const auto displayId = display->getId();
         LOG_ALWAYS_FATAL_IF(!displayId);
 
-        HWC2::VsyncPeriodChangeConstraints constraints;
+        hal::VsyncPeriodChangeConstraints constraints;
         constraints.desiredTimeNanos = systemTime();
         constraints.seamlessRequired = false;
 
-        HWC2::VsyncPeriodChangeTimeline timeline = {0, 0, 0};
+        hal::VsyncPeriodChangeTimeline timeline = {0, 0, 0};
         if (getHwComposer().setActiveConfigWithConstraints(*displayId,
                                                            policy->defaultConfig.value(),
                                                            constraints, &timeline) < 0) {
@@ -5997,28 +5959,25 @@
         return BAD_VALUE;
     }
 
-    status_t result = NAME_NOT_FOUND;
-
-    postMessageSync(new LambdaMessage([&]() {
+    auto future = schedule([=]() -> status_t {
         const auto display = getDisplayDeviceLocked(displayToken);
         if (!display) {
             ALOGE("Attempt to set desired display configs for invalid display token %p",
                   displayToken.get());
+            return NAME_NOT_FOUND;
         } else if (display->isVirtual()) {
             ALOGW("Attempt to set desired display configs for virtual display");
-            result = INVALID_OPERATION;
+            return INVALID_OPERATION;
         } else {
-            result = setDesiredDisplayConfigSpecsInternal(display,
-                                                          scheduler::RefreshRateConfigs::
-                                                                  Policy{HwcConfigIndexType(
-                                                                                 defaultConfig),
-                                                                         minRefreshRate,
-                                                                         maxRefreshRate},
-                                                          /*overridePolicy=*/false);
-        }
-    }));
+            using Policy = scheduler::RefreshRateConfigs::Policy;
+            const Policy policy{HwcConfigIndexType(defaultConfig), minRefreshRate, maxRefreshRate};
+            constexpr bool kOverridePolicy = false;
 
-    return result;
+            return setDesiredDisplayConfigSpecsInternal(display, policy, kOverridePolicy);
+        }
+    });
+
+    return future.get();
 }
 
 status_t SurfaceFlinger::getDesiredDisplayConfigSpecs(const sp<IBinder>& displayToken,
@@ -6062,7 +6021,12 @@
     mFlinger->setInputWindowsFinished();
 }
 
-sp<Layer> SurfaceFlinger::fromHandle(const sp<IBinder>& handle) {
+wp<Layer> SurfaceFlinger::fromHandle(const sp<IBinder>& handle) {
+    Mutex::Autolock _l(mStateLock);
+    return fromHandleLocked(handle);
+}
+
+wp<Layer> SurfaceFlinger::fromHandleLocked(const sp<IBinder>& handle) {
     BBinder* b = nullptr;
     if (handle) {
         b = handle->localBinder();
@@ -6072,7 +6036,7 @@
     }
     auto it = mLayersByLocalBinderToken.find(b);
     if (it != mLayersByLocalBinderToken.end()) {
-        return it->second.promote();
+        return it->second;
     }
     return nullptr;
 }
@@ -6142,7 +6106,7 @@
         return BAD_VALUE;
     }
 
-    postMessageAsync(new LambdaMessage([=]() NO_THREAD_SAFETY_ANALYSIS {
+    static_cast<void>(schedule([=]() NO_THREAD_SAFETY_ANALYSIS {
         Mutex::Autolock lock(mStateLock);
         if (authenticateSurfaceTextureLocked(surface)) {
             sp<Layer> layer = (static_cast<MonitoredProducer*>(surface.get()))->getLayer();
@@ -6165,8 +6129,11 @@
     if (!outToken) {
         return BAD_VALUE;
     }
-    status_t result = NO_ERROR;
-    postMessageSync(new LambdaMessage([&]() {
+
+    auto future = schedule([this] {
+        status_t result = NO_ERROR;
+        sp<IBinder> token;
+
         if (mFrameRateFlexibilityTokenCount == 0) {
             // |mStateLock| not needed as we are on the main thread
             const auto display = getDefaultDisplayDeviceLocked();
@@ -6180,8 +6147,8 @@
             overridePolicy.defaultConfig =
                     mRefreshRateConfigs->getDisplayManagerPolicy().defaultConfig;
             overridePolicy.allowGroupSwitching = true;
-            result = setDesiredDisplayConfigSpecsInternal(display, overridePolicy,
-                                                          /*overridePolicy=*/true);
+            constexpr bool kOverridePolicy = true;
+            result = setDesiredDisplayConfigSpecsInternal(display, overridePolicy, kOverridePolicy);
         }
 
         if (result == NO_ERROR) {
@@ -6198,17 +6165,22 @@
             //   2. The frame rate flexibility token is acquired/released only by CTS tests, so even
             //   if condition 1 were changed, the problem would only show up when running CTS tests,
             //   not on end user devices, so we could spot it and fix it without serious impact.
-            *outToken = new FrameRateFlexibilityToken(
+            token = new FrameRateFlexibilityToken(
                     [this]() { onFrameRateFlexibilityTokenReleased(); });
             ALOGD("Frame rate flexibility token acquired. count=%d",
                   mFrameRateFlexibilityTokenCount);
         }
-    }));
+
+        return std::make_pair(result, token);
+    });
+
+    status_t result;
+    std::tie(result, *outToken) = future.get();
     return result;
 }
 
 void SurfaceFlinger::onFrameRateFlexibilityTokenReleased() {
-    postMessageAsync(new LambdaMessage([&]() {
+    static_cast<void>(schedule([this] {
         LOG_ALWAYS_FATAL_IF(mFrameRateFlexibilityTokenCount == 0,
                             "Failed tracking frame rate flexibility tokens");
         mFrameRateFlexibilityTokenCount--;
@@ -6216,8 +6188,8 @@
         if (mFrameRateFlexibilityTokenCount == 0) {
             // |mStateLock| not needed as we are on the main thread
             const auto display = getDefaultDisplayDeviceLocked();
-            status_t result =
-                    setDesiredDisplayConfigSpecsInternal(display, {}, /*overridePolicy=*/true);
+            constexpr bool kOverridePolicy = true;
+            status_t result = setDesiredDisplayConfigSpecsInternal(display, {}, kOverridePolicy);
             LOG_ALWAYS_FATAL_IF(result < 0, "Failed releasing frame rate flexibility token");
         }
     }));
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index f3c481a..b65e4f6 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -33,7 +33,6 @@
 #include <gui/ITransactionCompletedListener.h>
 #include <gui/LayerState.h>
 #include <gui/OccupancyTracker.h>
-#include <hardware/hwcomposer_defs.h>
 #include <input/ISetInputWindowsListener.h>
 #include <layerproto/LayerProtoHeader.h>
 #include <math/mat4.h>
@@ -69,6 +68,7 @@
 #include <atomic>
 #include <cstdint>
 #include <functional>
+#include <future>
 #include <map>
 #include <memory>
 #include <mutex>
@@ -277,12 +277,9 @@
     // starts SurfaceFlinger main loop in the current thread
     void run() ANDROID_API;
 
-    // post an asynchronous message to the main thread
-    status_t postMessageAsync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0);
-
-    // post a synchronous message to the main thread
-    status_t postMessageSync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0)
-            EXCLUDES(mStateLock);
+    // Schedule an asynchronous or synchronous task on the main thread.
+    template <typename F, typename T = std::invoke_result_t<F>>
+    [[nodiscard]] std::future<T> schedule(F&&);
 
     // force full composition on all displays
     void repaintEverything();
@@ -311,12 +308,12 @@
 
     // main thread function to enable/disable h/w composer event
     void setPrimaryVsyncEnabledInternal(bool enabled);
-    void setVsyncEnabledInHWC(DisplayId displayId, HWC2::Vsync enabled);
+    void setVsyncEnabledInHWC(DisplayId displayId, hal::Vsync enabled);
 
     // called on the main thread by MessageQueue when an internal message
     // is received
     // TODO: this should be made accessible only to MessageQueue
-    void onMessageReceived(int32_t what);
+    void onMessageReceived(int32_t what, nsecs_t expectedVSyncTime);
 
     renderengine::RenderEngine& getRenderEngine() const;
 
@@ -332,7 +329,12 @@
         return mTransactionCompletedThread;
     }
 
-    sp<Layer> fromHandle(const sp<IBinder>& handle) REQUIRES(mStateLock);
+    // Converts from a binder handle to a Layer
+    // Returns nullptr if the handle does not point to an existing layer.
+    // Otherwise, returns a weak reference so that callers off the main-thread
+    // won't accidentally hold onto the last strong reference.
+    wp<Layer> fromHandle(const sp<IBinder>& handle);
+    wp<Layer> fromHandleLocked(const sp<IBinder>& handle) REQUIRES(mStateLock);
 
     // Inherit from ClientCache::ErasedRecipient
     void bufferErased(const client_cache_t& clientCacheId) override;
@@ -517,15 +519,15 @@
     /* ------------------------------------------------------------------------
      * HWC2::ComposerCallback / HWComposer::EventHandler interface
      */
-    void onVsyncReceived(int32_t sequenceId, hwc2_display_t hwcDisplayId, int64_t timestamp,
-                         std::optional<hwc2_vsync_period_t> vsyncPeriod) override;
-    void onHotplugReceived(int32_t sequenceId, hwc2_display_t hwcDisplayId,
-                           HWC2::Connection connection) override;
-    void onRefreshReceived(int32_t sequenceId, hwc2_display_t hwcDisplayId) override;
+    void onVsyncReceived(int32_t sequenceId, hal::HWDisplayId hwcDisplayId, int64_t timestamp,
+                         std::optional<hal::VsyncPeriodNanos> vsyncPeriod) override;
+    void onHotplugReceived(int32_t sequenceId, hal::HWDisplayId hwcDisplayId,
+                           hal::Connection connection) override;
+    void onRefreshReceived(int32_t sequenceId, hal::HWDisplayId hwcDisplayId) override;
     void onVsyncPeriodTimingChangedReceived(
-            int32_t sequenceId, hwc2_display_t display,
-            const hwc_vsync_period_change_timeline_t& updatedTimeline) override;
-    void onSeamlessPossible(int32_t sequenceId, hwc2_display_t display) override;
+            int32_t sequenceId, hal::HWDisplayId display,
+            const hal::VsyncPeriodChangeTimeline& updatedTimeline) override;
+    void onSeamlessPossible(int32_t sequenceId, hal::HWDisplayId display) override;
 
     /* ------------------------------------------------------------------------
      * ISchedulerCallback
@@ -538,7 +540,6 @@
     /* ------------------------------------------------------------------------
      * Message handling
      */
-    void waitForEvent();
     // Can only be called from the main thread or with mStateLock held
     void signalTransaction();
     // Can only be called from the main thread or with mStateLock held
@@ -570,7 +571,8 @@
     // Called when active config is no longer is progress
     void desiredActiveConfigChangeDone() REQUIRES(mStateLock);
     // called on the main thread in response to setPowerMode()
-    void setPowerModeInternal(const sp<DisplayDevice>& display, int mode) REQUIRES(mStateLock);
+    void setPowerModeInternal(const sp<DisplayDevice>& display, hal::PowerMode mode)
+            REQUIRES(mStateLock);
 
     // Sets the desired display configs.
     status_t setDesiredDisplayConfigSpecsInternal(
@@ -625,7 +627,6 @@
     void commitTransaction() REQUIRES(mStateLock);
     void commitOffscreenLayers();
     bool transactionIsReadyToBeApplied(int64_t desiredPresentTime,
-                                       bool useCachedExpectedPresentTime,
                                        const Vector<ComposerState>& states);
     uint32_t setDisplayStateLocked(const DisplayState& s) REQUIRES(mStateLock);
     uint32_t addInputWindowCommands(const InputWindowCommands& inputWindowCommands)
@@ -639,6 +640,13 @@
             REQUIRES(mStateLock);
     virtual void commitTransactionLocked();
 
+    // Used internally by computeLayerBounds() to gets the clip rectangle to use for the
+    // root layers on a particular display in layer-coordinate space. The
+    // layers (and effectively their children) will be clipped against this
+    // rectangle. The base behavior is to clip to the visible region of the
+    // display.
+    virtual FloatRect getLayerClipBoundsForDisplay(const DisplayDevice&) const;
+
 private:
     /* ------------------------------------------------------------------------
      * Layer management
@@ -697,19 +705,20 @@
 
     void renderScreenImplLocked(const RenderArea& renderArea, TraverseLayersFunction traverseLayers,
                                 ANativeWindowBuffer* buffer, bool useIdentityTransform,
-                                int* outSyncFd);
+                                bool regionSampling, int* outSyncFd);
     status_t captureScreenCommon(RenderArea& renderArea, TraverseLayersFunction traverseLayers,
                                  sp<GraphicBuffer>* outBuffer, const ui::PixelFormat reqPixelFormat,
                                  bool useIdentityTransform, bool& outCapturedSecureLayers);
     status_t captureScreenCommon(RenderArea& renderArea, TraverseLayersFunction traverseLayers,
                                  const sp<GraphicBuffer>& buffer, bool useIdentityTransform,
-                                 bool& outCapturedSecureLayers);
+                                 bool regionSampling, bool& outCapturedSecureLayers);
     const sp<DisplayDevice> getDisplayByIdOrLayerStack(uint64_t displayOrLayerStack);
     const sp<DisplayDevice> getDisplayByLayerStack(uint64_t layerStack);
     status_t captureScreenImplLocked(const RenderArea& renderArea,
                                      TraverseLayersFunction traverseLayers,
                                      ANativeWindowBuffer* buffer, bool useIdentityTransform,
-                                     bool forSystem, int* outSyncFd, bool& outCapturedSecureLayers);
+                                     bool forSystem, int* outSyncFd, bool regionSampling,
+                                     bool& outCapturedSecureLayers);
     void traverseLayersInDisplay(const sp<const DisplayDevice>& display,
                                  const LayerVector::Visitor& visitor);
 
@@ -847,9 +856,9 @@
     // Must be called on the main thread.
     nsecs_t previousFramePresentTime();
 
-    // Populates the expected present time for this frame. For negative offsets, performs a
+    // Calculates the expected present time for this frame. For negative offsets, performs a
     // correction using the predicted vsync for the next frame instead.
-    void populateExpectedPresentTime();
+    nsecs_t calculateExpectedPresentTime(nsecs_t now) const;
 
     /*
      * Display identification
@@ -929,8 +938,7 @@
     void dumpDisplayIdentificationData(std::string& result) const;
     void dumpRawDisplayIdentificationData(const DumpArgs&, std::string& result) const;
     void dumpWideColorInfo(std::string& result) const;
-    LayersProto dumpDrawingStateProto(uint32_t traceFlags = SurfaceTracing::TRACE_ALL,
-                                      const sp<const DisplayDevice>& displayDevice = nullptr) const;
+    LayersProto dumpDrawingStateProto(uint32_t traceFlags) const;
     void dumpOffscreenLayersProto(LayersProto& layersProto,
                                   uint32_t traceFlags = SurfaceTracing::TRACE_ALL) const;
     // Dumps state from HW Composer
@@ -938,7 +946,6 @@
     LayersProto dumpProtoFromMainThread(uint32_t traceFlags = SurfaceTracing::TRACE_ALL)
             EXCLUDES(mStateLock);
     void dumpOffscreenLayers(std::string& result) EXCLUDES(mStateLock);
-    void withTracingLock(std::function<void()> operation) REQUIRES(mStateLock);
 
     bool isLayerTripleBufferingDisabled() const {
         return this->mLayerTripleBufferingDisabled;
@@ -980,9 +987,6 @@
     SortedVector<sp<Layer>> mLayersPendingRemoval;
     bool mTraversalNeededMainThread = false;
 
-    // guards access to the mDrawing state if tracing is enabled.
-    mutable std::mutex mDrawingStateLock;
-
     // global color transform states
     Daltonizer mDaltonizer;
     float mGlobalSaturationFactor = 1.0f;
@@ -992,6 +996,8 @@
     std::set<wp<IBinder>> mGraphicBufferProducerList;
     size_t mMaxGraphicBufferProducerListSize = ISurfaceComposer::MAX_LAYERS;
 
+    void removeGraphicBufferProducerAsync(const wp<IBinder>&);
+
     // protected by mStateLock (but we could use another lock)
     bool mLayersRemoved = false;
     bool mLayersAdded = false;
@@ -1034,8 +1040,8 @@
     BootStage mBootStage = BootStage::BOOTLOADER;
 
     struct HotplugEvent {
-        hwc2_display_t hwcDisplayId;
-        HWC2::Connection connection = HWC2::Connection::Invalid;
+        hal::HWDisplayId hwcDisplayId;
+        hal::Connection connection = hal::Connection::INVALID;
     };
     // protected by mStateLock
     std::vector<HotplugEvent> mPendingHotplugEvents;
@@ -1057,10 +1063,13 @@
     bool mPropagateBackpressure = true;
     bool mPropagateBackpressureClientComposition = false;
     std::unique_ptr<SurfaceInterceptor> mInterceptor;
+
     SurfaceTracing mTracing{*this};
+    std::mutex mTracingLock;
     bool mTracingEnabled = false;
     bool mAddCompositionStateToTrace = false;
-    bool mTracingEnabledChanged GUARDED_BY(mStateLock) = false;
+    std::atomic<bool> mTracingEnabledChanged = false;
+
     const std::shared_ptr<TimeStats> mTimeStats;
     const std::unique_ptr<FrameTracer> mFrameTracer;
     bool mUseHwcVirtualDisplays = false;
@@ -1250,20 +1259,17 @@
     std::unordered_set<Layer*> mOffscreenLayers;
 
     // Flags to capture the state of Vsync in HWC
-    HWC2::Vsync mHWCVsyncState = HWC2::Vsync::Disable;
-    HWC2::Vsync mHWCVsyncPendingState = HWC2::Vsync::Disable;
+    hal::Vsync mHWCVsyncState = hal::Vsync::DISABLE;
+    hal::Vsync mHWCVsyncPendingState = hal::Vsync::DISABLE;
 
     // Fields tracking the current jank event: when it started and how many
     // janky frames there are.
     nsecs_t mMissedFrameJankStart = 0;
     int32_t mMissedFrameJankCount = 0;
 
-    // See updateInputWindowInfo() for details
-    std::atomic<bool> mInputDirty = true;
-    void dirtyInput() { mInputDirty = true; }
-    bool inputDirty() { return mInputDirty; }
-
     int mFrameRateFlexibilityTokenCount = 0;
+
+    sp<IBinder> mDebugFrameRateFlexibilityToken;
 };
 
 } // namespace android
diff --git a/services/surfaceflinger/SurfaceTracing.cpp b/services/surfaceflinger/SurfaceTracing.cpp
index f0b895d..d84ce69 100644
--- a/services/surfaceflinger/SurfaceTracing.cpp
+++ b/services/surfaceflinger/SurfaceTracing.cpp
@@ -33,7 +33,7 @@
 namespace android {
 
 SurfaceTracing::SurfaceTracing(SurfaceFlinger& flinger)
-      : mFlinger(flinger), mSfLock(flinger.mDrawingStateLock) {}
+      : mFlinger(flinger), mSfLock(flinger.mTracingLock) {}
 
 void SurfaceTracing::mainLoop() {
     bool enabled = addFirstEntry();
@@ -44,21 +44,19 @@
 }
 
 bool SurfaceTracing::addFirstEntry() {
-    const auto displayDevice = mFlinger.getDefaultDisplayDevice();
     LayersTraceProto entry;
     {
         std::scoped_lock lock(mSfLock);
-        entry = traceLayersLocked("tracing.enable", displayDevice);
+        entry = traceLayersLocked("tracing.enable");
     }
     return addTraceToBuffer(entry);
 }
 
 LayersTraceProto SurfaceTracing::traceWhenNotified() {
-    const auto displayDevice = mFlinger.getDefaultDisplayDevice();
     std::unique_lock<std::mutex> lock(mSfLock);
     mCanStartTrace.wait(lock);
     android::base::ScopedLockAssertion assumeLock(mSfLock);
-    LayersTraceProto entry = traceLayersLocked(mWhere, displayDevice);
+    LayersTraceProto entry = traceLayersLocked(mWhere);
     mTracingInProgress = false;
     mMissedTraceEntries = 0;
     lock.unlock();
@@ -126,15 +124,17 @@
     }
 }
 
-void SurfaceTracing::enable() {
+bool SurfaceTracing::enable() {
     std::scoped_lock lock(mTraceLock);
 
     if (mEnabled) {
-        return;
+        return false;
     }
+
     mBuffer.reset(mBufferSize);
     mEnabled = true;
     mThread = std::thread(&SurfaceTracing::mainLoop, this);
+    return true;
 }
 
 status_t SurfaceTracing::writeToFile() {
@@ -176,14 +176,13 @@
     mTraceFlags = flags;
 }
 
-LayersTraceProto SurfaceTracing::traceLayersLocked(const char* where,
-                                                   const sp<const DisplayDevice>& displayDevice) {
+LayersTraceProto SurfaceTracing::traceLayersLocked(const char* where) {
     ATRACE_CALL();
 
     LayersTraceProto entry;
     entry.set_elapsed_realtime_nanos(elapsedRealtimeNano());
     entry.set_where(where);
-    LayersProto layers(mFlinger.dumpDrawingStateProto(mTraceFlags, displayDevice));
+    LayersProto layers(mFlinger.dumpDrawingStateProto(mTraceFlags));
 
     if (flagIsSetLocked(SurfaceTracing::TRACE_EXTRA)) {
         mFlinger.dumpOffscreenLayersProto(layers);
diff --git a/services/surfaceflinger/SurfaceTracing.h b/services/surfaceflinger/SurfaceTracing.h
index e90fc4d..f208eb8 100644
--- a/services/surfaceflinger/SurfaceTracing.h
+++ b/services/surfaceflinger/SurfaceTracing.h
@@ -27,8 +27,6 @@
 #include <queue>
 #include <thread>
 
-#include "DisplayDevice.h"
-
 using namespace android::surfaceflinger;
 
 namespace android {
@@ -44,7 +42,7 @@
 class SurfaceTracing {
 public:
     explicit SurfaceTracing(SurfaceFlinger& flinger);
-    void enable();
+    bool enable();
     bool disable();
     status_t writeToFile();
     bool isEnabled() const;
@@ -92,9 +90,7 @@
     void mainLoop();
     bool addFirstEntry();
     LayersTraceProto traceWhenNotified();
-    LayersTraceProto traceLayersLocked(const char* where,
-                                       const sp<const DisplayDevice>& displayDevice)
-            REQUIRES(mSfLock);
+    LayersTraceProto traceLayersLocked(const char* where) REQUIRES(mSfLock);
 
     // Returns true if trace is enabled.
     bool addTraceToBuffer(LayersTraceProto& entry);
diff --git a/services/surfaceflinger/TimeStats/Android.bp b/services/surfaceflinger/TimeStats/Android.bp
index d27fbb4..3901757 100644
--- a/services/surfaceflinger/TimeStats/Android.bp
+++ b/services/surfaceflinger/TimeStats/Android.bp
@@ -4,6 +4,7 @@
         "TimeStats.cpp",
     ],
     shared_libs: [
+        "android.hardware.graphics.composer@2.4",
         "libbase",
         "libcutils",
         "liblog",
diff --git a/services/surfaceflinger/TimeStats/TimeStats.cpp b/services/surfaceflinger/TimeStats/TimeStats.cpp
index 606e137..37194c6 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.cpp
+++ b/services/surfaceflinger/TimeStats/TimeStats.cpp
@@ -290,6 +290,15 @@
     mTimeStats.refreshRateSwitches++;
 }
 
+void TimeStats::incrementCompositionStrategyChanges() {
+    if (!mEnabled.load()) return;
+
+    ATRACE_CALL();
+
+    std::lock_guard<std::mutex> lock(mMutex);
+    mTimeStats.compositionStrategyChanges++;
+}
+
 void TimeStats::recordDisplayEventConnectionCount(int32_t count) {
     if (!mEnabled.load()) return;
 
@@ -312,7 +321,7 @@
     if (!mEnabled.load()) return;
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (mPowerTime.powerMode == HWC_POWER_MODE_NORMAL) {
+    if (mPowerTime.powerMode == PowerMode::ON) {
         mTimeStats.frameDuration.insert(msBetween(startTime, endTime));
     }
 }
@@ -683,12 +692,13 @@
     int64_t elapsedTime = (curTime - mPowerTime.prevTime) / 1000000;
 
     switch (mPowerTime.powerMode) {
-        case HWC_POWER_MODE_NORMAL:
+        case PowerMode::ON:
             mTimeStats.displayOnTime += elapsedTime;
             break;
-        case HWC_POWER_MODE_OFF:
-        case HWC_POWER_MODE_DOZE:
-        case HWC_POWER_MODE_DOZE_SUSPEND:
+        case PowerMode::OFF:
+        case PowerMode::DOZE:
+        case PowerMode::DOZE_SUSPEND:
+        case PowerMode::ON_SUSPEND:
         default:
             break;
     }
@@ -696,7 +706,7 @@
     mPowerTime.prevTime = curTime;
 }
 
-void TimeStats::setPowerMode(int32_t powerMode) {
+void TimeStats::setPowerMode(PowerMode powerMode) {
     if (!mEnabled.load()) {
         std::lock_guard<std::mutex> lock(mMutex);
         mPowerTime.powerMode = powerMode;
@@ -784,8 +794,8 @@
         return;
     }
 
-    if (mPowerTime.powerMode != HWC_POWER_MODE_NORMAL) {
-        // Try flushing the last present fence on HWC_POWER_MODE_NORMAL.
+    if (mPowerTime.powerMode != PowerMode::ON) {
+        // Try flushing the last present fence on PowerMode::ON.
         flushAvailableGlobalRecordsToStatsLocked();
         mGlobalRecord.presentFences.clear();
         mGlobalRecord.prevPresentTime = 0;
@@ -844,6 +854,7 @@
     mTimeStats.clientCompositionFrames = 0;
     mTimeStats.clientCompositionReusedFrames = 0;
     mTimeStats.refreshRateSwitches = 0;
+    mTimeStats.compositionStrategyChanges = 0;
     mTimeStats.displayEventConnectionsCount = 0;
     mTimeStats.displayOnTime = 0;
     mTimeStats.presentToPresent.hist.clear();
diff --git a/services/surfaceflinger/TimeStats/TimeStats.h b/services/surfaceflinger/TimeStats/TimeStats.h
index 806b47e..8de5d0c 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.h
+++ b/services/surfaceflinger/TimeStats/TimeStats.h
@@ -16,7 +16,15 @@
 
 #pragma once
 
-#include <hardware/hwcomposer_defs.h>
+// TODO(b/129481165): remove the #pragma below and fix conversion issues
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wconversion"
+
+#include <android/hardware/graphics/composer/2.4/IComposerClient.h>
+
+// TODO(b/129481165): remove the #pragma below and fix conversion issues
+#pragma clang diagnostic pop // ignored "-Wconversion"
+
 #include <stats_event.h>
 #include <stats_pull_atom_callback.h>
 #include <statslog.h>
@@ -54,6 +62,10 @@
     virtual void incrementClientCompositionReusedFrames() = 0;
     // Increments the number of times the display refresh rate changed.
     virtual void incrementRefreshRateSwitches() = 0;
+    // Increments the number of changes in composition strategy
+    // The intention is to reflect the number of changes between hwc and gpu
+    // composition, where "gpu composition" may also include mixed composition.
+    virtual void incrementCompositionStrategyChanges() = 0;
     // Records the most up-to-date count of display event connections.
     // The stored count will be the maximum ever recoded.
     virtual void recordDisplayEventConnectionCount(int32_t count) = 0;
@@ -101,7 +113,8 @@
     // If SF skips or rejects a buffer, remove the corresponding TimeRecord.
     virtual void removeTimeRecord(int32_t layerId, uint64_t frameNumber) = 0;
 
-    virtual void setPowerMode(int32_t powerMode) = 0;
+    virtual void setPowerMode(
+            hardware::graphics::composer::V2_4::IComposerClient::PowerMode powerMode) = 0;
     // Source of truth is RefrehRateStats.
     virtual void recordRefreshRate(uint32_t fps, nsecs_t duration) = 0;
     virtual void setPresentFenceGlobal(const std::shared_ptr<FenceTime>& presentFence) = 0;
@@ -110,6 +123,8 @@
 namespace impl {
 
 class TimeStats : public android::TimeStats {
+    using PowerMode = android::hardware::graphics::composer::V2_4::IComposerClient::PowerMode;
+
     struct FrameTime {
         uint64_t frameNumber = 0;
         nsecs_t postTime = 0;
@@ -140,7 +155,7 @@
     };
 
     struct PowerTime {
-        int32_t powerMode = HWC_POWER_MODE_OFF;
+        PowerMode powerMode = PowerMode::OFF;
         nsecs_t prevTime = 0;
     };
 
@@ -218,6 +233,7 @@
     void incrementClientCompositionFrames() override;
     void incrementClientCompositionReusedFrames() override;
     void incrementRefreshRateSwitches() override;
+    void incrementCompositionStrategyChanges() override;
     void recordDisplayEventConnectionCount(int32_t count) override;
 
     void recordFrameDuration(nsecs_t startTime, nsecs_t endTime) override;
@@ -242,7 +258,8 @@
     // If SF skips or rejects a buffer, remove the corresponding TimeRecord.
     void removeTimeRecord(int32_t layerId, uint64_t frameNumber) override;
 
-    void setPowerMode(int32_t powerMode) override;
+    void setPowerMode(
+            hardware::graphics::composer::V2_4::IComposerClient::PowerMode powerMode) override;
     // Source of truth is RefrehRateStats.
     void recordRefreshRate(uint32_t fps, nsecs_t duration) override;
     void setPresentFenceGlobal(const std::shared_ptr<FenceTime>& presentFence) override;
diff --git a/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp b/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
index 5305de9..c90b1b8 100644
--- a/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
+++ b/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
@@ -106,6 +106,7 @@
     StringAppendF(&result, "clientCompositionFrames = %d\n", clientCompositionFrames);
     StringAppendF(&result, "clientCompositionReusedFrames = %d\n", clientCompositionReusedFrames);
     StringAppendF(&result, "refreshRateSwitches = %d\n", refreshRateSwitches);
+    StringAppendF(&result, "compositionStrategyChanges = %d\n", compositionStrategyChanges);
     StringAppendF(&result, "displayOnTime = %" PRId64 " ms\n", displayOnTime);
     StringAppendF(&result, "displayConfigStats is as below:\n");
     for (const auto& [fps, duration] : refreshRateStats) {
diff --git a/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h b/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h
index afb98e0..0c75f96 100644
--- a/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h
+++ b/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h
@@ -63,6 +63,7 @@
         int32_t clientCompositionFrames = 0;
         int32_t clientCompositionReusedFrames = 0;
         int32_t refreshRateSwitches = 0;
+        int32_t compositionStrategyChanges = 0;
         int32_t displayEventConnectionsCount = 0;
         int64_t displayOnTime = 0;
         Histogram presentToPresent;
diff --git a/services/surfaceflinger/tests/LayerTransactionTest.h b/services/surfaceflinger/tests/LayerTransactionTest.h
index 40ec502..f3e11d8 100644
--- a/services/surfaceflinger/tests/LayerTransactionTest.h
+++ b/services/surfaceflinger/tests/LayerTransactionTest.h
@@ -19,7 +19,6 @@
 #include <gtest/gtest.h>
 #include <gui/ISurfaceComposer.h>
 #include <gui/SurfaceComposerClient.h>
-#include <hardware/hwcomposer_defs.h>
 #include <private/gui/ComposerService.h>
 #include <ui/DisplayConfig.h>
 
diff --git a/services/surfaceflinger/tests/fakehwc/Android.bp b/services/surfaceflinger/tests/fakehwc/Android.bp
index ff403f6..2861013 100644
--- a/services/surfaceflinger/tests/fakehwc/Android.bp
+++ b/services/surfaceflinger/tests/fakehwc/Android.bp
@@ -23,7 +23,6 @@
         "libcutils",
         "libfmq",
         "libgui",
-        "libhardware",
         "libhidlbase",
         "liblayers_proto",
         "liblog",
diff --git a/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h b/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h
index 5240b72..600e765 100644
--- a/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h
+++ b/services/surfaceflinger/tests/fakehwc/FakeComposerClient.h
@@ -16,24 +16,16 @@
 
 #pragma once
 
-#define HWC2_USE_CPP11
-#define HWC2_INCLUDE_STRINGIFICATION
+#include <chrono>
+
 #include <composer-hal/2.1/ComposerClient.h>
 #include <composer-hal/2.2/ComposerClient.h>
 #include <composer-hal/2.3/ComposerClient.h>
 #include <composer-hal/2.4/ComposerClient.h>
-#undef HWC2_USE_CPP11
-#undef HWC2_INCLUDE_STRINGIFICATION
-#include "RenderState.h"
-
-#include "MockComposerHal.h"
-
-// Needed for display type/ID enums
-#include <hardware/hwcomposer_defs.h>
-
 #include <utils/Condition.h>
 
-#include <chrono>
+#include "MockComposerHal.h"
+#include "RenderState.h"
 
 using namespace android::hardware::graphics::common;
 using namespace android::hardware::graphics::composer;
diff --git a/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.h b/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.h
index 09a2a89..383a111 100644
--- a/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.h
+++ b/services/surfaceflinger/tests/fakehwc/FakeComposerUtils.h
@@ -19,11 +19,7 @@
 #include "FakeComposerClient.h"
 
 #include <gui/SurfaceComposerClient.h>
-
-#include <hardware/hwcomposer_defs.h>
-
 #include <log/log.h>
-
 #include <gtest/gtest.h>
 
 // clang-format off
diff --git a/services/surfaceflinger/tests/fakehwc/RenderState.h b/services/surfaceflinger/tests/fakehwc/RenderState.h
index 0059289..40193f2 100644
--- a/services/surfaceflinger/tests/fakehwc/RenderState.h
+++ b/services/surfaceflinger/tests/fakehwc/RenderState.h
@@ -16,8 +16,6 @@
 
 #pragma once
 
-#include <hardware/hwcomposer2.h>
-
 #include <vector>
 
 namespace sftest {
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 2f2fb20..7574ff1 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -48,6 +48,7 @@
         "LayerHistoryTestV2.cpp",
         "LayerMetadataTest.cpp",
         "PhaseOffsetsTest.cpp",
+        "PromiseTest.cpp",
         "SchedulerTest.cpp",
         "SchedulerUtilsTest.cpp",
         "SetFrameRateTest.cpp",
diff --git a/services/surfaceflinger/tests/unittests/CompositionTest.cpp b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
index 2dcaf63..8713b2b 100644
--- a/services/surfaceflinger/tests/unittests/CompositionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
@@ -50,6 +50,14 @@
 namespace android {
 namespace {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
+using hal::Error;
+using hal::IComposer;
+using hal::IComposerClient;
+using hal::PowerMode;
+using hal::Transform;
+
 using testing::_;
 using testing::AtLeast;
 using testing::Between;
@@ -65,16 +73,11 @@
 using testing::ReturnRef;
 using testing::SetArgPointee;
 
-using android::Hwc2::Error;
-using android::Hwc2::IComposer;
-using android::Hwc2::IComposerClient;
-using android::Hwc2::Transform;
-
 using FakeHwcDisplayInjector = TestableSurfaceFlinger::FakeHwcDisplayInjector;
 using FakeDisplayDeviceInjector = TestableSurfaceFlinger::FakeDisplayDeviceInjector;
 
-constexpr hwc2_display_t HWC_DISPLAY = FakeHwcDisplayInjector::DEFAULT_HWC_DISPLAY_ID;
-constexpr hwc2_layer_t HWC_LAYER = 5000;
+constexpr hal::HWDisplayId HWC_DISPLAY = FakeHwcDisplayInjector::DEFAULT_HWC_DISPLAY_ID;
+constexpr hal::HWLayerId HWC_LAYER = 5000;
 constexpr Transform DEFAULT_TRANSFORM = static_cast<Transform>(0);
 
 constexpr DisplayId DEFAULT_DISPLAY_ID = DisplayId{42};
@@ -141,10 +144,10 @@
 
         auto primaryDispSync = std::make_unique<mock::DispSync>();
 
-        EXPECT_CALL(*primaryDispSync, computeNextRefresh(0)).WillRepeatedly(Return(0));
+        EXPECT_CALL(*primaryDispSync, computeNextRefresh(0, _)).WillRepeatedly(Return(0));
         EXPECT_CALL(*primaryDispSync, getPeriod())
                 .WillRepeatedly(Return(FakeHwcDisplayInjector::DEFAULT_REFRESH_RATE));
-        EXPECT_CALL(*primaryDispSync, expectedPresentTime()).WillRepeatedly(Return(0));
+        EXPECT_CALL(*primaryDispSync, expectedPresentTime(_)).WillRepeatedly(Return(0));
 
         mFlinger.setupScheduler(std::move(primaryDispSync),
                                 std::make_unique<mock::EventControlThread>(),
@@ -170,7 +173,7 @@
     template <typename Case>
     void captureScreenComposition();
 
-    std::unordered_set<HWC2::Capability> mDefaultCapabilities = {HWC2::Capability::SidebandStream};
+    std::unordered_set<hal::Capability> mDefaultCapabilities = {hal::Capability::SIDEBAND_STREAM};
 
     bool mDisplayOff = false;
     TestableSurfaceFlinger mFlinger;
@@ -228,6 +231,7 @@
     const Rect sourceCrop(0, 0, DEFAULT_DISPLAY_WIDTH, DEFAULT_DISPLAY_HEIGHT);
     constexpr bool useIdentityTransform = true;
     constexpr bool forSystem = true;
+    constexpr bool regionSampling = false;
 
     DisplayRenderArea renderArea(mDisplay, sourceCrop, DEFAULT_DISPLAY_WIDTH,
                                  DEFAULT_DISPLAY_HEIGHT, ui::Dataspace::V0_SRGB,
@@ -246,7 +250,7 @@
     int fd = -1;
     status_t result =
             mFlinger.captureScreenImplLocked(renderArea, traverseLayers, mCaptureScreenBuffer.get(),
-                                             useIdentityTransform, forSystem, &fd);
+                                             useIdentityTransform, forSystem, &fd, regionSampling);
     if (fd >= 0) {
         close(fd);
     }
@@ -263,17 +267,13 @@
 template <typename Derived>
 struct BaseDisplayVariant {
     static constexpr bool IS_SECURE = true;
-    static constexpr int INIT_POWER_MODE = HWC_POWER_MODE_NORMAL;
+    static constexpr hal::PowerMode INIT_POWER_MODE = hal::PowerMode::ON;
 
     static void setupPreconditions(CompositionTest* test) {
-        EXPECT_CALL(*test->mComposer,
-                    setPowerMode(HWC_DISPLAY,
-                                 static_cast<Hwc2::IComposerClient::PowerMode>(
-                                         Derived::INIT_POWER_MODE)))
+        EXPECT_CALL(*test->mComposer, setPowerMode(HWC_DISPLAY, Derived::INIT_POWER_MODE))
                 .WillOnce(Return(Error::NONE));
 
-        FakeHwcDisplayInjector(DEFAULT_DISPLAY_ID, HWC2::DisplayType::Physical,
-                               true /* isPrimary */)
+        FakeHwcDisplayInjector(DEFAULT_DISPLAY_ID, hal::DisplayType::PHYSICAL, true /* isPrimary */)
                 .setCapabilities(&test->mDefaultCapabilities)
                 .setPowerMode(Derived::INIT_POWER_MODE)
                 .inject(&test->mFlinger, test->mComposer);
@@ -437,7 +437,7 @@
 };
 
 struct PoweredOffDisplaySetupVariant : public BaseDisplayVariant<PoweredOffDisplaySetupVariant> {
-    static constexpr int INIT_POWER_MODE = HWC_POWER_MODE_OFF;
+    static constexpr hal::PowerMode INIT_POWER_MODE = hal::PowerMode::OFF;
 
     template <typename Case>
     static void setupPreconditionCallExpectations(CompositionTest*) {}
@@ -542,7 +542,7 @@
 
         EXPECT_CALL(*test->mMessageQueue, invalidate()).Times(1);
         enqueueBuffer(test, layer);
-        Mock::VerifyAndClear(test->mMessageQueue);
+        Mock::VerifyAndClearExpectations(test->mMessageQueue);
 
         EXPECT_CALL(*test->mRenderEngine, useNativeFenceSync()).WillRepeatedly(Return(true));
         bool ignoredRecomputeVisibleRegions;
@@ -834,7 +834,7 @@
 struct BaseLayerVariant {
     template <typename L, typename F>
     static sp<L> createLayerWithFactory(CompositionTest* test, F factory) {
-        EXPECT_CALL(*test->mMessageQueue, postMessage(_, 0)).Times(0);
+        EXPECT_CALL(*test->mMessageQueue, postMessage(_)).Times(0);
 
         sp<L> layer = factory();
 
@@ -843,7 +843,7 @@
 
         Mock::VerifyAndClear(test->mComposer);
         Mock::VerifyAndClear(test->mRenderEngine);
-        Mock::VerifyAndClear(test->mMessageQueue);
+        Mock::VerifyAndClearExpectations(test->mMessageQueue);
 
         auto& layerDrawingState = test->mFlinger.mutableLayerDrawingState(layer);
         layerDrawingState.layerStack = DEFAULT_LAYER_STACK;
@@ -944,7 +944,7 @@
     }
 
     static void cleanupInjectedLayers(CompositionTest* test) {
-        EXPECT_CALL(*test->mMessageQueue, postMessage(_, 0)).Times(1);
+        EXPECT_CALL(*test->mMessageQueue, postMessage(_)).Times(1);
         Base::cleanupInjectedLayers(test);
     }
 
@@ -989,7 +989,7 @@
 
 template <IComposerClient::Composition CompositionType>
 struct KeepCompositionTypeVariant {
-    static constexpr HWC2::Composition TYPE = static_cast<HWC2::Composition>(CompositionType);
+    static constexpr hal::Composition TYPE = CompositionType;
 
     static void setupHwcSetCallExpectations(CompositionTest* test) {
         if (!test->mDisplayOff) {
@@ -1007,7 +1007,7 @@
 template <IComposerClient::Composition InitialCompositionType,
           IComposerClient::Composition FinalCompositionType>
 struct ChangeCompositionTypeVariant {
-    static constexpr HWC2::Composition TYPE = static_cast<HWC2::Composition>(FinalCompositionType);
+    static constexpr hal::Composition TYPE = FinalCompositionType;
 
     static void setupHwcSetCallExpectations(CompositionTest* test) {
         if (!test->mDisplayOff) {
diff --git a/services/surfaceflinger/tests/unittests/DispSyncSourceTest.cpp b/services/surfaceflinger/tests/unittests/DispSyncSourceTest.cpp
index 2e705da..afebc40 100644
--- a/services/surfaceflinger/tests/unittests/DispSyncSourceTest.cpp
+++ b/services/surfaceflinger/tests/unittests/DispSyncSourceTest.cpp
@@ -43,7 +43,7 @@
     void createDispSync();
     void createDispSyncSource();
 
-    void onVSyncEvent(nsecs_t when) override;
+    void onVSyncEvent(nsecs_t when, nsecs_t expectedVSyncTimestamp) override;
 
     std::unique_ptr<mock::DispSync> mDispSync;
     std::unique_ptr<DispSyncSource> mDispSyncSource;
@@ -66,7 +66,7 @@
     ALOGD("**** Tearing down after %s.%s\n", test_info->test_case_name(), test_info->name());
 }
 
-void DispSyncSourceTest::onVSyncEvent(nsecs_t when) {
+void DispSyncSourceTest::onVSyncEvent(nsecs_t when, nsecs_t /*expectedVSyncTimestamp*/) {
     ALOGD("onVSyncEvent: %" PRId64, when);
 
     mVSyncEventCallRecorder.recordCall(when);
diff --git a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
index cd11409..ce5f35c 100644
--- a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
@@ -55,6 +55,8 @@
 namespace android {
 namespace {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 using testing::_;
 using testing::AnyNumber;
 using testing::DoAll;
@@ -65,13 +67,18 @@
 using testing::SetArgPointee;
 using testing::StrictMock;
 
-using android::Hwc2::ColorMode;
-using android::Hwc2::Error;
-using android::Hwc2::Hdr;
-using android::Hwc2::IComposer;
-using android::Hwc2::IComposerClient;
-using android::Hwc2::PerFrameMetadataKey;
-using android::Hwc2::RenderIntent;
+using hal::ColorMode;
+using hal::Connection;
+using hal::DisplayCapability;
+using hal::DisplayType;
+using hal::Error;
+using hal::Hdr;
+using hal::HWDisplayId;
+using hal::IComposer;
+using hal::IComposerClient;
+using hal::PerFrameMetadataKey;
+using hal::PowerMode;
+using hal::RenderIntent;
 
 using FakeDisplayDeviceInjector = TestableSurfaceFlinger::FakeDisplayDeviceInjector;
 using FakeHwcDisplayInjector = TestableSurfaceFlinger::FakeHwcDisplayInjector;
@@ -82,7 +89,7 @@
 constexpr int32_t DEFAULT_DPI = 320;
 constexpr int DEFAULT_VIRTUAL_DISPLAY_SURFACE_FORMAT = HAL_PIXEL_FORMAT_RGB_565;
 
-constexpr int HWC_POWER_MODE_LEET = 1337; // An out of range power mode value
+constexpr int POWER_MODE_LEET = 1337; // An out of range power mode value
 
 /* ------------------------------------------------------------------------
  * Boolean avoidance
@@ -120,7 +127,7 @@
     // --------------------------------------------------------------------
     // Postcondition helpers
 
-    bool hasPhysicalHwcDisplay(hwc2_display_t hwcDisplayId);
+    bool hasPhysicalHwcDisplay(HWDisplayId hwcDisplayId);
     bool hasTransactionFlagSet(int flag);
     bool hasDisplayDevice(sp<IBinder> displayToken);
     sp<DisplayDevice> getDisplayDevice(sp<IBinder> displayToken);
@@ -246,7 +253,7 @@
     constexpr DisplayId DEFAULT_DISPLAY_ID = DisplayId{777};
     constexpr int DEFAULT_DISPLAY_WIDTH = 1080;
     constexpr int DEFAULT_DISPLAY_HEIGHT = 1920;
-    constexpr hwc2_display_t DEFAULT_DISPLAY_HWC_DISPLAY_ID = 0;
+    constexpr HWDisplayId DEFAULT_DISPLAY_HWC_DISPLAY_ID = 0;
 
     // The DisplayDevice is required to have a framebuffer (behind the
     // ANativeWindow interface) which uses the actual hardware display
@@ -285,7 +292,7 @@
     return displayDevice;
 }
 
-bool DisplayTransactionTest::hasPhysicalHwcDisplay(hwc2_display_t hwcDisplayId) {
+bool DisplayTransactionTest::hasPhysicalHwcDisplay(HWDisplayId hwcDisplayId) {
     return mFlinger.mutableHwcPhysicalDisplayIdMap().count(hwcDisplayId) == 1;
 }
 
@@ -343,8 +350,8 @@
     static std::optional<DisplayId> get() {
         if (!PhysicalDisplay::HAS_IDENTIFICATION_DATA) {
             return getFallbackDisplayId(static_cast<bool>(PhysicalDisplay::PRIMARY)
-                                                ? HWC_DISPLAY_PRIMARY
-                                                : HWC_DISPLAY_EXTERNAL);
+                                                ? LEGACY_DISPLAY_TYPE_PRIMARY
+                                                : LEGACY_DISPLAY_TYPE_EXTERNAL);
         }
 
         const auto info =
@@ -376,19 +383,19 @@
 
 template <typename>
 struct HwcDisplayIdGetter {
-    static constexpr std::optional<hwc2_display_t> value;
+    static constexpr std::optional<HWDisplayId> value;
 };
 
-constexpr hwc2_display_t HWC_VIRTUAL_DISPLAY_HWC_DISPLAY_ID = 1010;
+constexpr HWDisplayId HWC_VIRTUAL_DISPLAY_HWC_DISPLAY_ID = 1010;
 
 template <DisplayId::Type displayId>
 struct HwcDisplayIdGetter<VirtualDisplayId<displayId>> {
-    static constexpr std::optional<hwc2_display_t> value = HWC_VIRTUAL_DISPLAY_HWC_DISPLAY_ID;
+    static constexpr std::optional<HWDisplayId> value = HWC_VIRTUAL_DISPLAY_HWC_DISPLAY_ID;
 };
 
 template <typename PhysicalDisplay>
 struct HwcDisplayIdGetter<PhysicalDisplayId<PhysicalDisplay>> {
-    static constexpr std::optional<hwc2_display_t> value = PhysicalDisplay::HWC_DISPLAY_ID;
+    static constexpr std::optional<HWDisplayId> value = PhysicalDisplay::HWC_DISPLAY_ID;
 };
 
 // DisplayIdType can be:
@@ -497,21 +504,20 @@
     }
 };
 
-template <hwc2_display_t hwcDisplayId, HWC2::DisplayType hwcDisplayType, typename DisplayVariant,
+template <HWDisplayId hwcDisplayId, DisplayType hwcDisplayType, typename DisplayVariant,
           typename PhysicalDisplay = void>
 struct HwcDisplayVariant {
     // The display id supplied by the HWC
-    static constexpr hwc2_display_t HWC_DISPLAY_ID = hwcDisplayId;
+    static constexpr HWDisplayId HWC_DISPLAY_ID = hwcDisplayId;
 
     // The HWC display type
-    static constexpr HWC2::DisplayType HWC_DISPLAY_TYPE = hwcDisplayType;
+    static constexpr DisplayType HWC_DISPLAY_TYPE = hwcDisplayType;
 
     // The HWC active configuration id
     static constexpr int HWC_ACTIVE_CONFIG_ID = 2001;
-    static constexpr int INIT_POWER_MODE = HWC_POWER_MODE_NORMAL;
+    static constexpr PowerMode INIT_POWER_MODE = PowerMode::ON;
 
-    static void injectPendingHotplugEvent(DisplayTransactionTest* test,
-                                          HWC2::Connection connection) {
+    static void injectPendingHotplugEvent(DisplayTransactionTest* test, Connection connection) {
         test->mFlinger.mutablePendingHotplugEvents().emplace_back(
                 HotplugEvent{HWC_DISPLAY_ID, connection});
     }
@@ -533,11 +539,9 @@
     // Called by tests to inject a HWC display setup
     static void injectHwcDisplay(DisplayTransactionTest* test) {
         EXPECT_CALL(*test->mComposer, getDisplayCapabilities(HWC_DISPLAY_ID, _))
-                .WillOnce(DoAll(SetArgPointee<1>(std::vector<Hwc2::DisplayCapability>({})),
+                .WillOnce(DoAll(SetArgPointee<1>(std::vector<DisplayCapability>({})),
                                 Return(Error::NONE)));
-        EXPECT_CALL(*test->mComposer,
-                    setPowerMode(HWC_DISPLAY_ID,
-                                 static_cast<Hwc2::IComposerClient::PowerMode>(INIT_POWER_MODE)))
+        EXPECT_CALL(*test->mComposer, setPowerMode(HWC_DISPLAY_ID, INIT_POWER_MODE))
                 .WillOnce(Return(Error::NONE));
         injectHwcDisplayWithNoDefaultCapabilities(test);
     }
@@ -568,10 +572,10 @@
                 : IComposerClient::DisplayConnectionType::EXTERNAL;
 
         EXPECT_CALL(*test->mComposer, getDisplayConnectionType(HWC_DISPLAY_ID, _))
-                .WillOnce(
-                        DoAll(SetArgPointee<1>(CONNECTION_TYPE), Return(Hwc2::V2_4::Error::NONE)));
+                .WillOnce(DoAll(SetArgPointee<1>(CONNECTION_TYPE), Return(hal::V2_4::Error::NONE)));
 
-        EXPECT_CALL(*test->mComposer, setClientTargetSlotCount(_)).WillOnce(Return(Error::NONE));
+        EXPECT_CALL(*test->mComposer, setClientTargetSlotCount(_))
+                .WillOnce(Return(hal::Error::NONE));
         EXPECT_CALL(*test->mComposer, getDisplayConfigs(HWC_DISPLAY_ID, _))
                 .WillOnce(DoAll(SetArgPointee<1>(std::vector<unsigned>{HWC_ACTIVE_CONFIG_ID}),
                                 Return(Error::NONE)));
@@ -626,7 +630,7 @@
 struct PhysicalDisplayVariant
       : DisplayVariant<PhysicalDisplayId<PhysicalDisplay>, width, height, critical, Async::FALSE,
                        Secure::TRUE, PhysicalDisplay::PRIMARY, GRALLOC_USAGE_PHYSICAL_DISPLAY>,
-        HwcDisplayVariant<PhysicalDisplay::HWC_DISPLAY_ID, HWC2::DisplayType::Physical,
+        HwcDisplayVariant<PhysicalDisplay::HWC_DISPLAY_ID, DisplayType::PHYSICAL,
                           DisplayVariant<PhysicalDisplayId<PhysicalDisplay>, width, height,
                                          critical, Async::FALSE, Secure::TRUE,
                                          PhysicalDisplay::PRIMARY, GRALLOC_USAGE_PHYSICAL_DISPLAY>,
@@ -637,7 +641,7 @@
     static constexpr auto CONNECTION_TYPE = DisplayConnectionType::Internal;
     static constexpr Primary PRIMARY = Primary::TRUE;
     static constexpr uint8_t PORT = 255;
-    static constexpr hwc2_display_t HWC_DISPLAY_ID = 1001;
+    static constexpr HWDisplayId HWC_DISPLAY_ID = 1001;
     static constexpr bool HAS_IDENTIFICATION_DATA = hasIdentificationData;
     static constexpr auto GET_IDENTIFICATION_DATA = getInternalEdid;
 };
@@ -647,7 +651,7 @@
     static constexpr auto CONNECTION_TYPE = DisplayConnectionType::External;
     static constexpr Primary PRIMARY = Primary::FALSE;
     static constexpr uint8_t PORT = 254;
-    static constexpr hwc2_display_t HWC_DISPLAY_ID = 1002;
+    static constexpr HWDisplayId HWC_DISPLAY_ID = 1002;
     static constexpr bool HAS_IDENTIFICATION_DATA = hasIdentificationData;
     static constexpr auto GET_IDENTIFICATION_DATA = getExternalEdid;
 };
@@ -655,7 +659,7 @@
 struct TertiaryDisplay {
     static constexpr Primary PRIMARY = Primary::FALSE;
     static constexpr uint8_t PORT = 253;
-    static constexpr hwc2_display_t HWC_DISPLAY_ID = 1003;
+    static constexpr HWDisplayId HWC_DISPLAY_ID = 1003;
     static constexpr auto GET_IDENTIFICATION_DATA = getExternalEdid;
 };
 
@@ -716,7 +720,7 @@
       : DisplayVariant<VirtualDisplayId<42>, width, height, Critical::FALSE, Async::TRUE, secure,
                        Primary::FALSE, GRALLOC_USAGE_HWC_VIRTUAL_DISPLAY>,
         HwcDisplayVariant<
-                HWC_VIRTUAL_DISPLAY_HWC_DISPLAY_ID, HWC2::DisplayType::Virtual,
+                HWC_VIRTUAL_DISPLAY_HWC_DISPLAY_ID, DisplayType::VIRTUAL,
                 DisplayVariant<VirtualDisplayId<42>, width, height, Critical::FALSE, Async::TRUE,
                                secure, Primary::FALSE, GRALLOC_USAGE_HWC_VIRTUAL_DISPLAY>> {
     using Base = DisplayVariant<VirtualDisplayId<42>, width, height, Critical::FALSE, Async::TRUE,
@@ -1046,8 +1050,8 @@
 
 TEST_F(DisplayTransactionTest, hotplugEnqueuesEventsForDisplayTransaction) {
     constexpr int currentSequenceId = 123;
-    constexpr hwc2_display_t hwcDisplayId1 = 456;
-    constexpr hwc2_display_t hwcDisplayId2 = 654;
+    constexpr HWDisplayId hwcDisplayId1 = 456;
+    constexpr HWDisplayId hwcDisplayId2 = 654;
 
     // --------------------------------------------------------------------
     // Preconditions
@@ -1070,8 +1074,8 @@
     // Invocation
 
     // Simulate two hotplug events (a connect and a disconnect)
-    mFlinger.onHotplugReceived(currentSequenceId, hwcDisplayId1, HWC2::Connection::Connected);
-    mFlinger.onHotplugReceived(currentSequenceId, hwcDisplayId2, HWC2::Connection::Disconnected);
+    mFlinger.onHotplugReceived(currentSequenceId, hwcDisplayId1, Connection::CONNECTED);
+    mFlinger.onHotplugReceived(currentSequenceId, hwcDisplayId2, Connection::DISCONNECTED);
 
     // --------------------------------------------------------------------
     // Postconditions
@@ -1083,15 +1087,15 @@
     const auto& pendingEvents = mFlinger.mutablePendingHotplugEvents();
     ASSERT_EQ(2u, pendingEvents.size());
     EXPECT_EQ(hwcDisplayId1, pendingEvents[0].hwcDisplayId);
-    EXPECT_EQ(HWC2::Connection::Connected, pendingEvents[0].connection);
+    EXPECT_EQ(Connection::CONNECTED, pendingEvents[0].connection);
     EXPECT_EQ(hwcDisplayId2, pendingEvents[1].hwcDisplayId);
-    EXPECT_EQ(HWC2::Connection::Disconnected, pendingEvents[1].connection);
+    EXPECT_EQ(Connection::DISCONNECTED, pendingEvents[1].connection);
 }
 
 TEST_F(DisplayTransactionTest, hotplugDiscardsUnexpectedEvents) {
     constexpr int currentSequenceId = 123;
     constexpr int otherSequenceId = 321;
-    constexpr hwc2_display_t displayId = 456;
+    constexpr HWDisplayId displayId = 456;
 
     // --------------------------------------------------------------------
     // Preconditions
@@ -1113,7 +1117,7 @@
     // Invocation
 
     // Call with an unexpected sequence id
-    mFlinger.onHotplugReceived(otherSequenceId, displayId, HWC2::Connection::Invalid);
+    mFlinger.onHotplugReceived(otherSequenceId, displayId, Connection::INVALID);
 
     // --------------------------------------------------------------------
     // Postconditions
@@ -1127,7 +1131,7 @@
 
 TEST_F(DisplayTransactionTest, hotplugProcessesEnqueuedEventsIfCalledOnMainThread) {
     constexpr int currentSequenceId = 123;
-    constexpr hwc2_display_t displayId1 = 456;
+    constexpr HWDisplayId displayId1 = 456;
 
     // --------------------------------------------------------------------
     // Note:
@@ -1161,7 +1165,7 @@
     // Simulate a disconnect on a display id that is not connected. This should
     // be enqueued by onHotplugReceived(), and dequeued by
     // processDisplayHotplugEventsLocked(), but then ignored as invalid.
-    mFlinger.onHotplugReceived(currentSequenceId, displayId1, HWC2::Connection::Disconnected);
+    mFlinger.onHotplugReceived(currentSequenceId, displayId1, Connection::DISCONNECTED);
 
     // --------------------------------------------------------------------
     // Postconditions
@@ -2010,7 +2014,7 @@
     setupCommonPreconditions<Case>();
 
     // A hotplug connect event is enqueued for a display
-    Case::Display::injectPendingHotplugEvent(this, HWC2::Connection::Connected);
+    Case::Display::injectPendingHotplugEvent(this, Connection::CONNECTED);
 
     // --------------------------------------------------------------------
     // Call Expectations
@@ -2046,7 +2050,7 @@
     setupCommonPreconditions<Case>();
 
     // A hotplug connect event is enqueued for a display
-    Case::Display::injectPendingHotplugEvent(this, HWC2::Connection::Connected);
+    Case::Display::injectPendingHotplugEvent(this, Connection::CONNECTED);
 
     // --------------------------------------------------------------------
     // Invocation
@@ -2068,7 +2072,7 @@
     setupCommonPreconditions<Case>();
 
     // A hotplug disconnect event is enqueued for a display
-    Case::Display::injectPendingHotplugEvent(this, HWC2::Connection::Disconnected);
+    Case::Display::injectPendingHotplugEvent(this, Connection::DISCONNECTED);
 
     // The display is already completely set up.
     Case::Display::injectHwcDisplay(this);
@@ -2166,9 +2170,9 @@
     setupCommonPreconditions<Case>();
 
     // A hotplug connect event is enqueued for a display
-    Case::Display::injectPendingHotplugEvent(this, HWC2::Connection::Connected);
+    Case::Display::injectPendingHotplugEvent(this, Connection::CONNECTED);
     // A hotplug disconnect event is also enqueued for the same display
-    Case::Display::injectPendingHotplugEvent(this, HWC2::Connection::Disconnected);
+    Case::Display::injectPendingHotplugEvent(this, Connection::DISCONNECTED);
 
     // --------------------------------------------------------------------
     // Call Expectations
@@ -2214,9 +2218,9 @@
     existing.inject();
 
     // A hotplug disconnect event is enqueued for a display
-    Case::Display::injectPendingHotplugEvent(this, HWC2::Connection::Disconnected);
+    Case::Display::injectPendingHotplugEvent(this, Connection::DISCONNECTED);
     // A hotplug connect event is also enqueued for the same display
-    Case::Display::injectPendingHotplugEvent(this, HWC2::Connection::Connected);
+    Case::Display::injectPendingHotplugEvent(this, Connection::CONNECTED);
 
     // --------------------------------------------------------------------
     // Call Expectations
@@ -3093,7 +3097,7 @@
     // processing.
     EXPECT_CALL(*mMessageQueue, invalidate()).Times(1);
 
-    EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime()).WillRepeatedly(Return(0));
+    EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime(_)).WillRepeatedly(Return(0));
 
     // --------------------------------------------------------------------
     // Invocation
@@ -3121,10 +3125,10 @@
     EXPECT_EQ(0u, primaryDisplayState.width);
     EXPECT_EQ(0u, primaryDisplayState.height);
 
-    // The display should be set to HWC_POWER_MODE_NORMAL
+    // The display should be set to PowerMode::ON
     ASSERT_TRUE(hasDisplayDevice(primaryDisplay.token()));
     auto displayDevice = primaryDisplay.mutableDisplayDevice();
-    EXPECT_EQ(HWC_POWER_MODE_NORMAL, displayDevice->getPowerMode());
+    EXPECT_EQ(PowerMode::ON, displayDevice->getPowerMode());
 
     // The display refresh period should be set in the frame tracker.
     FrameStats stats;
@@ -3156,8 +3160,8 @@
 
     static void setupComposerCallExpectations(DisplayTransactionTest* test) {
         EXPECT_CALL(*test->mComposer, getDisplayCapabilities(Display::HWC_DISPLAY_ID, _))
-                .WillOnce(DoAll(SetArgPointee<1>(std::vector<Hwc2::DisplayCapability>(
-                                        {Hwc2::DisplayCapability::DOZE})),
+                .WillOnce(DoAll(SetArgPointee<1>(
+                                        std::vector<DisplayCapability>({DisplayCapability::DOZE})),
                                 Return(Error::NONE)));
     }
 };
@@ -3173,7 +3177,7 @@
 
     static void setupComposerCallExpectations(DisplayTransactionTest* test) {
         EXPECT_CALL(*test->mComposer, getDisplayCapabilities(Display::HWC_DISPLAY_ID, _))
-                .WillOnce(DoAll(SetArgPointee<1>(std::vector<Hwc2::DisplayCapability>({})),
+                .WillOnce(DoAll(SetArgPointee<1>(std::vector<DisplayCapability>({})),
                                 Return(Error::NONE)));
     }
 };
@@ -3247,7 +3251,7 @@
 // selected subset which provides complete test coverage of the implementation.
 // --------------------------------------------------------------------
 
-template <int initialPowerMode, int targetPowerMode>
+template <PowerMode initialPowerMode, PowerMode targetPowerMode>
 struct TransitionVariantCommon {
     static constexpr auto INITIAL_POWER_MODE = initialPowerMode;
     static constexpr auto TARGET_POWER_MODE = targetPowerMode;
@@ -3255,8 +3259,7 @@
     static void verifyPostconditions(DisplayTransactionTest*) {}
 };
 
-struct TransitionOffToOnVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_OFF, HWC_POWER_MODE_NORMAL> {
+struct TransitionOffToOnVariant : public TransitionVariantCommon<PowerMode::OFF, PowerMode::ON> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::setupComposerCallExpectations(test, IComposerClient::PowerMode::ON);
@@ -3272,7 +3275,7 @@
 };
 
 struct TransitionOffToDozeSuspendVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_OFF, HWC_POWER_MODE_DOZE_SUSPEND> {
+      : public TransitionVariantCommon<PowerMode::OFF, PowerMode::DOZE_SUSPEND> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::setupComposerCallExpectations(test, Case::Doze::ACTUAL_POWER_MODE_FOR_DOZE_SUSPEND);
@@ -3286,8 +3289,7 @@
     }
 };
 
-struct TransitionOnToOffVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_NORMAL, HWC_POWER_MODE_OFF> {
+struct TransitionOnToOffVariant : public TransitionVariantCommon<PowerMode::ON, PowerMode::OFF> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupReleaseAndDisableVsyncCallExpectations(test);
@@ -3301,7 +3303,7 @@
 };
 
 struct TransitionDozeSuspendToOffVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_DOZE_SUSPEND, HWC_POWER_MODE_OFF> {
+      : public TransitionVariantCommon<PowerMode::DOZE_SUSPEND, PowerMode::OFF> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupEventAndEventControlThreadNoCallExpectations(test);
@@ -3313,8 +3315,7 @@
     }
 };
 
-struct TransitionOnToDozeVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_NORMAL, HWC_POWER_MODE_DOZE> {
+struct TransitionOnToDozeVariant : public TransitionVariantCommon<PowerMode::ON, PowerMode::DOZE> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupEventAndEventControlThreadNoCallExpectations(test);
@@ -3323,7 +3324,7 @@
 };
 
 struct TransitionDozeSuspendToDozeVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_DOZE_SUSPEND, HWC_POWER_MODE_DOZE> {
+      : public TransitionVariantCommon<PowerMode::DOZE_SUSPEND, PowerMode::DOZE> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupAcquireAndEnableVsyncCallExpectations(test);
@@ -3332,8 +3333,7 @@
     }
 };
 
-struct TransitionDozeToOnVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_DOZE, HWC_POWER_MODE_NORMAL> {
+struct TransitionDozeToOnVariant : public TransitionVariantCommon<PowerMode::DOZE, PowerMode::ON> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupEventAndEventControlThreadNoCallExpectations(test);
@@ -3342,7 +3342,7 @@
 };
 
 struct TransitionDozeSuspendToOnVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_DOZE_SUSPEND, HWC_POWER_MODE_NORMAL> {
+      : public TransitionVariantCommon<PowerMode::DOZE_SUSPEND, PowerMode::ON> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupAcquireAndEnableVsyncCallExpectations(test);
@@ -3352,7 +3352,7 @@
 };
 
 struct TransitionOnToDozeSuspendVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_NORMAL, HWC_POWER_MODE_DOZE_SUSPEND> {
+      : public TransitionVariantCommon<PowerMode::ON, PowerMode::DOZE_SUSPEND> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupReleaseAndDisableVsyncCallExpectations(test);
@@ -3362,7 +3362,7 @@
 };
 
 struct TransitionOnToUnknownVariant
-      : public TransitionVariantCommon<HWC_POWER_MODE_NORMAL, HWC_POWER_MODE_LEET> {
+      : public TransitionVariantCommon<PowerMode::ON, static_cast<PowerMode>(POWER_MODE_LEET)> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::EventThread::setupEventAndEventControlThreadNoCallExpectations(test);
@@ -3387,7 +3387,7 @@
     using DispSync = DispSyncVariant;
     using Transition = TransitionVariant;
 
-    static auto injectDisplayWithInitialPowerMode(DisplayTransactionTest* test, int mode) {
+    static auto injectDisplayWithInitialPowerMode(DisplayTransactionTest* test, PowerMode mode) {
         Display::injectHwcDisplayWithNoDefaultCapabilities(test);
         auto display = Display::makeFakeExistingDisplayInjector(test);
         display.inject();
@@ -3403,13 +3403,14 @@
         EXPECT_CALL(*test->mMessageQueue, invalidate()).Times(1);
     }
 
-    static void setupSurfaceInterceptorCallExpectations(DisplayTransactionTest* test, int mode) {
+    static void setupSurfaceInterceptorCallExpectations(DisplayTransactionTest* test,
+                                                        PowerMode mode) {
         EXPECT_CALL(*test->mSurfaceInterceptor, isEnabled()).WillOnce(Return(true));
-        EXPECT_CALL(*test->mSurfaceInterceptor, savePowerModeUpdate(_, mode)).Times(1);
+        EXPECT_CALL(*test->mSurfaceInterceptor, savePowerModeUpdate(_, static_cast<int32_t>(mode)))
+                .Times(1);
     }
 
-    static void setupComposerCallExpectations(DisplayTransactionTest* test,
-                                              IComposerClient::PowerMode mode) {
+    static void setupComposerCallExpectations(DisplayTransactionTest* test, PowerMode mode) {
         // Any calls to get the active config will return a default value.
         EXPECT_CALL(*test->mComposer, getActiveConfig(Display::HWC_DISPLAY_ID, _))
                 .WillRepeatedly(DoAll(SetArgPointee<1>(Display::HWC_ACTIVE_CONFIG_ID),
@@ -3451,14 +3452,14 @@
     void transitionDisplayCommon();
 };
 
-template <int PowerMode>
+template <PowerMode PowerMode>
 struct PowerModeInitialVSyncEnabled : public std::false_type {};
 
 template <>
-struct PowerModeInitialVSyncEnabled<HWC_POWER_MODE_NORMAL> : public std::true_type {};
+struct PowerModeInitialVSyncEnabled<PowerMode::ON> : public std::true_type {};
 
 template <>
-struct PowerModeInitialVSyncEnabled<HWC_POWER_MODE_DOZE> : public std::true_type {};
+struct PowerModeInitialVSyncEnabled<PowerMode::DOZE> : public std::true_type {};
 
 template <typename Case>
 void SetPowerModeInternalTest::transitionDisplayCommon() {
@@ -3501,18 +3502,18 @@
     auto display = Case::Display::makeFakeExistingDisplayInjector(this);
     display.inject();
 
-    // The display is already set to HWC_POWER_MODE_NORMAL
-    display.mutableDisplayDevice()->setPowerMode(HWC_POWER_MODE_NORMAL);
+    // The display is already set to PowerMode::ON
+    display.mutableDisplayDevice()->setPowerMode(PowerMode::ON);
 
     // --------------------------------------------------------------------
     // Invocation
 
-    mFlinger.setPowerModeInternal(display.mutableDisplayDevice(), HWC_POWER_MODE_NORMAL);
+    mFlinger.setPowerModeInternal(display.mutableDisplayDevice(), PowerMode::ON);
 
     // --------------------------------------------------------------------
     // Postconditions
 
-    EXPECT_EQ(HWC_POWER_MODE_NORMAL, display.mutableDisplayDevice()->getPowerMode());
+    EXPECT_EQ(PowerMode::ON, display.mutableDisplayDevice()->getPowerMode());
 }
 
 TEST_F(SetPowerModeInternalTest, setPowerModeInternalDoesNothingIfVirtualDisplay) {
@@ -3531,18 +3532,18 @@
     auto display = Case::Display::makeFakeExistingDisplayInjector(this);
     display.inject();
 
-    // The display is set to HWC_POWER_MODE_NORMAL
-    getDisplayDevice(display.token())->setPowerMode(HWC_POWER_MODE_NORMAL);
+    // The display is set to PowerMode::ON
+    getDisplayDevice(display.token())->setPowerMode(PowerMode::ON);
 
     // --------------------------------------------------------------------
     // Invocation
 
-    mFlinger.setPowerModeInternal(display.mutableDisplayDevice(), HWC_POWER_MODE_OFF);
+    mFlinger.setPowerModeInternal(display.mutableDisplayDevice(), PowerMode::OFF);
 
     // --------------------------------------------------------------------
     // Postconditions
 
-    EXPECT_EQ(HWC_POWER_MODE_NORMAL, display.mutableDisplayDevice()->getPowerMode());
+    EXPECT_EQ(PowerMode::ON, display.mutableDisplayDevice()->getPowerMode());
 }
 
 TEST_F(SetPowerModeInternalTest, transitionsDisplayFromOffToOnPrimaryDisplay) {
diff --git a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
index ba5c0c2..b90b566 100644
--- a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
+++ b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
@@ -258,14 +258,14 @@
 
     // Use the received callback to signal a first vsync event.
     // The interceptor should receive the event, as well as the connection.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     expectVsyncEventReceivedByConnection(123, 1u);
 
     // Use the received callback to signal a second vsync event.
     // The interceptor should receive the event, but the the connection should
     // not as it was only interested in the first.
-    mCallback->onVSyncEvent(456);
+    mCallback->onVSyncEvent(456, 123);
     expectInterceptCallReceived(456);
     EXPECT_FALSE(mConnectionEventCallRecorder.waitForUnexpectedCall().has_value());
 
@@ -299,7 +299,7 @@
     // Send a vsync event. EventThread should then make a call to the
     // interceptor, and the second connection. The first connection should not
     // get the event.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     EXPECT_FALSE(firstConnectionEventRecorder.waitForUnexpectedCall().has_value());
     expectVsyncEventReceivedByConnection("secondConnection", secondConnectionEventRecorder, 123,
@@ -314,17 +314,17 @@
 
     // Send a vsync event. EventThread should then make a call to the
     // interceptor, and the connection.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     expectVsyncEventReceivedByConnection(123, 1u);
 
     // A second event should go to the same places.
-    mCallback->onVSyncEvent(456);
+    mCallback->onVSyncEvent(456, 123);
     expectInterceptCallReceived(456);
     expectVsyncEventReceivedByConnection(456, 2u);
 
     // A third event should go to the same places.
-    mCallback->onVSyncEvent(789);
+    mCallback->onVSyncEvent(789, 777);
     expectInterceptCallReceived(789);
     expectVsyncEventReceivedByConnection(789, 3u);
 }
@@ -336,22 +336,22 @@
     expectVSyncSetEnabledCallReceived(true);
 
     // The first event will be seen by the interceptor, and not the connection.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     EXPECT_FALSE(mConnectionEventCallRecorder.waitForUnexpectedCall().has_value());
 
     // The second event will be seen by the interceptor and the connection.
-    mCallback->onVSyncEvent(456);
+    mCallback->onVSyncEvent(456, 123);
     expectInterceptCallReceived(456);
     expectVsyncEventReceivedByConnection(456, 2u);
 
     // The third event will be seen by the interceptor, and not the connection.
-    mCallback->onVSyncEvent(789);
+    mCallback->onVSyncEvent(789, 777);
     expectInterceptCallReceived(789);
     EXPECT_FALSE(mConnectionEventCallRecorder.waitForUnexpectedCall().has_value());
 
     // The fourth event will be seen by the interceptor and the connection.
-    mCallback->onVSyncEvent(101112);
+    mCallback->onVSyncEvent(101112, 7847);
     expectInterceptCallReceived(101112);
     expectVsyncEventReceivedByConnection(101112, 4u);
 }
@@ -366,7 +366,7 @@
     mConnection = nullptr;
 
     // The first event will be seen by the interceptor, and not the connection.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     EXPECT_FALSE(mConnectionEventCallRecorder.waitForUnexpectedCall().has_value());
 
@@ -386,13 +386,13 @@
 
     // The first event will be seen by the interceptor, and by the connection,
     // which then returns an error.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     expectVsyncEventReceivedByConnection("errorConnection", errorConnectionEventRecorder, 123, 1u);
 
     // A subsequent event will be seen by the interceptor and not by the
     // connection.
-    mCallback->onVSyncEvent(456);
+    mCallback->onVSyncEvent(456, 123);
     expectInterceptCallReceived(456);
     EXPECT_FALSE(errorConnectionEventRecorder.waitForUnexpectedCall().has_value());
 
@@ -420,7 +420,7 @@
 
     // The first event will be seen by the interceptor, and by the connection,
     // which then returns an error.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     expectVsyncEventReceivedByConnection("errorConnection", errorConnectionEventRecorder, 123, 1u);
     expectVsyncEventReceivedByConnection("successConnection", secondConnectionEventRecorder, 123,
@@ -440,13 +440,13 @@
 
     // The first event will be seen by the interceptor, and by the connection,
     // which then returns an non-fatal error.
-    mCallback->onVSyncEvent(123);
+    mCallback->onVSyncEvent(123, 456);
     expectInterceptCallReceived(123);
     expectVsyncEventReceivedByConnection("errorConnection", errorConnectionEventRecorder, 123, 1u);
 
     // A subsequent event will be seen by the interceptor, and by the connection,
     // which still then returns an non-fatal error.
-    mCallback->onVSyncEvent(456);
+    mCallback->onVSyncEvent(456, 123);
     expectInterceptCallReceived(456);
     expectVsyncEventReceivedByConnection("errorConnection", errorConnectionEventRecorder, 456, 2u);
 
diff --git a/services/surfaceflinger/tests/unittests/HWComposerTest.cpp b/services/surfaceflinger/tests/unittests/HWComposerTest.cpp
index c6fe205..91b304c 100644
--- a/services/surfaceflinger/tests/unittests/HWComposerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/HWComposerTest.cpp
@@ -36,6 +36,8 @@
 namespace android {
 namespace {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 using ::testing::_;
 using ::testing::DoAll;
 using ::testing::ElementsAreArray;
@@ -47,15 +49,15 @@
     ~MockHWC2ComposerCallback() = default;
 
     MOCK_METHOD3(onHotplugReceived,
-                 void(int32_t sequenceId, hwc2_display_t display, HWC2::Connection connection));
-    MOCK_METHOD2(onRefreshReceived, void(int32_t sequenceId, hwc2_display_t display));
+                 void(int32_t sequenceId, hal::HWDisplayId display, hal::Connection connection));
+    MOCK_METHOD2(onRefreshReceived, void(int32_t sequenceId, hal::HWDisplayId display));
     MOCK_METHOD4(onVsyncReceived,
-                 void(int32_t sequenceId, hwc2_display_t display, int64_t timestamp,
-                      std::optional<hwc2_vsync_period_t> vsyncPeriod));
+                 void(int32_t sequenceId, hal::HWDisplayId display, int64_t timestamp,
+                      std::optional<hal::VsyncPeriodNanos> vsyncPeriod));
     MOCK_METHOD3(onVsyncPeriodTimingChangedReceived,
-                 void(int32_t sequenceId, hwc2_display_t display,
-                      const hwc_vsync_period_change_timeline_t& updatedTimeline));
-    MOCK_METHOD2(onSeamlessPossible, void(int32_t sequenceId, hwc2_display_t display));
+                 void(int32_t sequenceId, hal::HWDisplayId display,
+                      const hal::VsyncPeriodChangeTimeline& updatedTimeline));
+    MOCK_METHOD2(onSeamlessPossible, void(int32_t sequenceId, hal::HWDisplayId display));
 };
 
 struct HWComposerTest : public testing::Test {
@@ -73,14 +75,12 @@
     constexpr bool kMetadata2Mandatory = true;
 
     EXPECT_CALL(*mHal, getMaxVirtualDisplayCount()).WillOnce(Return(0));
-    EXPECT_CALL(*mHal, getCapabilities())
-            .WillOnce(Return(std::vector<Hwc2::IComposer::Capability>{}));
+    EXPECT_CALL(*mHal, getCapabilities()).WillOnce(Return(std::vector<hal::Capability>{}));
     EXPECT_CALL(*mHal, getLayerGenericMetadataKeys(_))
-            .WillOnce(DoAll(SetArgPointee<0>(
-                                    std::vector<Hwc2::IComposerClient::LayerGenericMetadataKey>{
-                                            {kMetadata1Name, kMetadata1Mandatory},
-                                            {kMetadata2Name, kMetadata2Mandatory},
-                                    }),
+            .WillOnce(DoAll(SetArgPointee<0>(std::vector<hal::LayerGenericMetadataKey>{
+                                    {kMetadata1Name, kMetadata1Mandatory},
+                                    {kMetadata2Name, kMetadata2Mandatory},
+                            }),
                             Return(hardware::graphics::composer::V2_4::Error::NONE)));
     EXPECT_CALL(*mHal, registerCallback(_));
     EXPECT_CALL(*mHal, isVsyncPeriodSwitchSupported()).WillOnce(Return(false));
@@ -98,8 +98,7 @@
 
 TEST_F(HWComposerSetConfigurationTest, handlesUnsupportedCallToGetLayerGenericMetadataKeys) {
     EXPECT_CALL(*mHal, getMaxVirtualDisplayCount()).WillOnce(Return(0));
-    EXPECT_CALL(*mHal, getCapabilities())
-            .WillOnce(Return(std::vector<Hwc2::IComposer::Capability>{}));
+    EXPECT_CALL(*mHal, getCapabilities()).WillOnce(Return(std::vector<hal::Capability>{}));
     EXPECT_CALL(*mHal, getLayerGenericMetadataKeys(_))
             .WillOnce(Return(hardware::graphics::composer::V2_4::Error::UNSUPPORTED));
     EXPECT_CALL(*mHal, registerCallback(_));
@@ -113,16 +112,16 @@
 }
 
 struct HWComposerLayerTest : public testing::Test {
-    static constexpr hwc2_display_t kDisplayId = static_cast<hwc2_display_t>(1001);
-    static constexpr hwc2_layer_t kLayerId = static_cast<hwc2_layer_t>(1002);
+    static constexpr hal::HWDisplayId kDisplayId = static_cast<hal::HWDisplayId>(1001);
+    static constexpr hal::HWLayerId kLayerId = static_cast<hal::HWLayerId>(1002);
 
-    HWComposerLayerTest(const std::unordered_set<HWC2::Capability>& capabilities)
+    HWComposerLayerTest(const std::unordered_set<hal::Capability>& capabilities)
           : mCapabilies(capabilities) {}
 
     ~HWComposerLayerTest() override { EXPECT_CALL(*mHal, destroyLayer(kDisplayId, kLayerId)); }
 
     std::unique_ptr<Hwc2::mock::Composer> mHal{new StrictMock<Hwc2::mock::Composer>()};
-    const std::unordered_set<HWC2::Capability> mCapabilies;
+    const std::unordered_set<hal::Capability> mCapabilies;
     HWC2::impl::Layer mLayer{*mHal, mCapabilies, kDisplayId, kLayerId};
 };
 
@@ -159,7 +158,7 @@
     auto result = mLayer.setLayerGenericMetadata(kLayerGenericMetadata1Name,
                                                  kLayerGenericMetadata1Mandatory,
                                                  kLayerGenericMetadata1Value);
-    EXPECT_EQ(HWC2::Error::None, result);
+    EXPECT_EQ(hal::Error::NONE, result);
 
     EXPECT_CALL(*mHal,
                 setLayerGenericMetadata(kDisplayId, kLayerId, kLayerGenericMetadata2Name,
@@ -169,7 +168,7 @@
     result = mLayer.setLayerGenericMetadata(kLayerGenericMetadata2Name,
                                             kLayerGenericMetadata2Mandatory,
                                             kLayerGenericMetadata2Value);
-    EXPECT_EQ(HWC2::Error::Unsupported, result);
+    EXPECT_EQ(hal::Error::UNSUPPORTED, result);
 }
 
 } // namespace
diff --git a/services/surfaceflinger/tests/unittests/LayerHistoryTestV2.cpp b/services/surfaceflinger/tests/unittests/LayerHistoryTestV2.cpp
index 71e37a8..6fca673 100644
--- a/services/surfaceflinger/tests/unittests/LayerHistoryTestV2.cpp
+++ b/services/surfaceflinger/tests/unittests/LayerHistoryTestV2.cpp
@@ -270,12 +270,12 @@
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 
-    // layer became inactive
+    // layer became inactive, but the vote stays
     setLayerInfoVote(layer.get(), LayerHistory::LayerVoteType::Heuristic);
     time += MAX_ACTIVE_LAYER_PERIOD_NS.count();
-    ASSERT_TRUE(history().summarize(time).empty());
-    // TODO: activeLayerCount() should be 0 but it is 1 since getFrameRateForLayerTree() returns a
-    // value > 0
+    ASSERT_EQ(1, history().summarize(time).size());
+    EXPECT_EQ(LayerHistory::LayerVoteType::ExplicitDefault, history().summarize(time)[0].vote);
+    EXPECT_FLOAT_EQ(73.4f, history().summarize(time)[0].desiredRefreshRate);
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(0, frequentLayerCount(time));
 }
@@ -303,12 +303,13 @@
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(1, frequentLayerCount(time));
 
-    // layer became inactive
+    // layer became inactive, but the vote stays
     setLayerInfoVote(layer.get(), LayerHistory::LayerVoteType::Heuristic);
     time += MAX_ACTIVE_LAYER_PERIOD_NS.count();
-    ASSERT_TRUE(history().summarize(time).empty());
-    // TODO: activeLayerCount() should be 0 but it is 1 since getFrameRateForLayerTree() returns a
-    // value > 0
+    ASSERT_EQ(1, history().summarize(time).size());
+    EXPECT_EQ(LayerHistory::LayerVoteType::ExplicitExactOrMultiple,
+              history().summarize(time)[0].vote);
+    EXPECT_FLOAT_EQ(73.4f, history().summarize(time)[0].desiredRefreshRate);
     EXPECT_EQ(1, activeLayerCount());
     EXPECT_EQ(0, frequentLayerCount(time));
 }
diff --git a/services/surfaceflinger/tests/unittests/PhaseOffsetsTest.cpp b/services/surfaceflinger/tests/unittests/PhaseOffsetsTest.cpp
index ce5993a..0b74682 100644
--- a/services/surfaceflinger/tests/unittests/PhaseOffsetsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/PhaseOffsetsTest.cpp
@@ -145,7 +145,9 @@
 
 class TestablePhaseOffsets : public impl::PhaseOffsets {
 public:
-    TestablePhaseOffsets() : impl::PhaseOffsets({60.0f, 90.0f}, 60.0f, 10'000'000) {}
+    TestablePhaseOffsets()
+          : impl::PhaseOffsets({60.0f, 90.0f}, 60.0f, 1'000'000, 1'000'000, {}, {}, {}, {},
+                               10'000'000) {}
 };
 
 class PhaseOffsetsTest : public testing::Test {
diff --git a/services/surfaceflinger/tests/unittests/PromiseTest.cpp b/services/surfaceflinger/tests/unittests/PromiseTest.cpp
new file mode 100644
index 0000000..e4dc1fe
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/PromiseTest.cpp
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2020 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 <algorithm>
+#include <future>
+#include <string>
+#include <thread>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#include "Promise.h"
+
+namespace android {
+namespace {
+
+using Bytes = std::vector<uint8_t>;
+
+Bytes decrement(Bytes bytes) {
+    std::transform(bytes.begin(), bytes.end(), bytes.begin(), [](auto b) { return b - 1; });
+    return bytes;
+}
+
+} // namespace
+
+TEST(PromiseTest, yield) {
+    EXPECT_EQ(42, promise::yield(42).get());
+
+    auto ptr = std::make_unique<char>('!');
+    auto future = promise::yield(std::move(ptr));
+    EXPECT_EQ('!', *future.get());
+}
+
+TEST(PromiseTest, chain) {
+    std::packaged_task<const char*()> fetchString([] { return "ifmmp-"; });
+
+    std::packaged_task<Bytes(std::string)> appendString([](std::string str) {
+        str += "!xpsme";
+        return Bytes{str.begin(), str.end()};
+    });
+
+    std::packaged_task<std::future<Bytes>(Bytes)> decrementBytes(
+            [](Bytes bytes) { return promise::defer(decrement, std::move(bytes)); });
+
+    auto fetch = fetchString.get_future();
+    std::thread fetchThread(std::move(fetchString));
+
+    std::thread appendThread, decrementThread;
+
+    EXPECT_EQ("hello, world",
+              promise::chain(std::move(fetch))
+                      .then([](const char* str) { return std::string(str); })
+                      .then([&](std::string str) {
+                          auto append = appendString.get_future();
+                          appendThread = std::thread(std::move(appendString), std::move(str));
+                          return append;
+                      })
+                      .then([&](Bytes bytes) {
+                          auto decrement = decrementBytes.get_future();
+                          decrementThread = std::thread(std::move(decrementBytes),
+                                                        std::move(bytes));
+                          return decrement;
+                      })
+                      .then([](std::future<Bytes> bytes) { return bytes; })
+                      .then([](const Bytes& bytes) {
+                          return std::string(bytes.begin(), bytes.end());
+                      })
+                      .get());
+
+    fetchThread.join();
+    appendThread.join();
+    decrementThread.join();
+}
+
+} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
index 1b8f11b..2ceb89c 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
@@ -32,6 +32,8 @@
 namespace android {
 namespace scheduler {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 using RefreshRate = RefreshRateConfigs::RefreshRate;
 using LayerVoteType = RefreshRateConfigs::LayerVoteType;
 using LayerRequirement = RefreshRateConfigs::LayerRequirement;
@@ -142,7 +144,7 @@
 std::shared_ptr<const HWC2::Display::Config> RefreshRateConfigsTest::createConfig(
         HwcConfigIndexType configId, int32_t configGroup, int64_t vsyncPeriod, int32_t hight,
         int32_t width) {
-    return HWC2::Display::Config::Builder(mDisplay, hwc2_config_t(configId.value()))
+    return HWC2::Display::Config::Builder(mDisplay, hal::HWConfigId(configId.value()))
             .setVsyncPeriod(int32_t(vsyncPeriod))
             .setConfigGroup(configGroup)
             .setHeight(hight)
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
index 18b1063..43b8e01 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
@@ -142,10 +142,10 @@
 
     auto primaryDispSync = std::make_unique<mock::DispSync>();
 
-    EXPECT_CALL(*primaryDispSync, computeNextRefresh(0)).WillRepeatedly(Return(0));
+    EXPECT_CALL(*primaryDispSync, computeNextRefresh(0, _)).WillRepeatedly(Return(0));
     EXPECT_CALL(*primaryDispSync, getPeriod())
             .WillRepeatedly(Return(FakeHwcDisplayInjector::DEFAULT_REFRESH_RATE));
-    EXPECT_CALL(*primaryDispSync, expectedPresentTime()).WillRepeatedly(Return(0));
+    EXPECT_CALL(*primaryDispSync, expectedPresentTime(_)).WillRepeatedly(Return(0));
     mFlinger.setupScheduler(std::move(primaryDispSync),
                             std::make_unique<mock::EventControlThread>(), std::move(eventThread),
                             std::move(sfEventThread));
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateStatsTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateStatsTest.cpp
index 038e6e6..de66f8f 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateStatsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateStatsTest.cpp
@@ -30,6 +30,7 @@
 #include "mock/MockTimeStats.h"
 
 using namespace std::chrono_literals;
+using android::hardware::graphics::composer::hal::PowerMode;
 using testing::_;
 using testing::AtLeast;
 
@@ -50,10 +51,9 @@
     void init(const std::vector<std::shared_ptr<const HWC2::Display::Config>>& configs) {
         mRefreshRateConfigs =
                 std::make_unique<RefreshRateConfigs>(configs, /*currentConfig=*/CONFIG_ID_0);
-        mRefreshRateStats =
-                std::make_unique<RefreshRateStats>(*mRefreshRateConfigs, mTimeStats,
-                                                   /*currentConfigId=*/CONFIG_ID_0,
-                                                   /*currentPowerMode=*/HWC_POWER_MODE_OFF);
+        mRefreshRateStats = std::make_unique<RefreshRateStats>(*mRefreshRateConfigs, mTimeStats,
+                                                               /*currentConfigId=*/CONFIG_ID_0,
+                                                               /*currentPowerMode=*/PowerMode::OFF);
     }
 
     Hwc2::mock::Display mDisplay;
@@ -80,7 +80,7 @@
 
 std::shared_ptr<const HWC2::Display::Config> RefreshRateStatsTest::createConfig(
         HwcConfigIndexType configId, int32_t configGroup, int64_t vsyncPeriod) {
-    return HWC2::Display::Config::Builder(mDisplay, hwc2_config_t(configId.value()))
+    return HWC2::Display::Config::Builder(mDisplay, configId.value())
             .setVsyncPeriod(int32_t(vsyncPeriod))
             .setConfigGroup(configGroup)
             .build();
@@ -111,7 +111,7 @@
     EXPECT_EQ(0u, times.count("90fps"));
 
     mRefreshRateStats->setConfigMode(CONFIG_ID_0);
-    mRefreshRateStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mRefreshRateStats->setPowerMode(PowerMode::ON);
     screenOff = mRefreshRateStats->getTotalTimes()["ScreenOff"];
     std::this_thread::sleep_for(std::chrono::milliseconds(2));
     times = mRefreshRateStats->getTotalTimes();
@@ -119,7 +119,7 @@
     ASSERT_EQ(1u, times.count("90fps"));
     EXPECT_LT(0, times["90fps"]);
 
-    mRefreshRateStats->setPowerMode(HWC_POWER_MODE_DOZE);
+    mRefreshRateStats->setPowerMode(PowerMode::DOZE);
     int ninety = mRefreshRateStats->getTotalTimes()["90fps"];
     std::this_thread::sleep_for(std::chrono::milliseconds(2));
     times = mRefreshRateStats->getTotalTimes();
@@ -130,7 +130,7 @@
     screenOff = mRefreshRateStats->getTotalTimes()["ScreenOff"];
     std::this_thread::sleep_for(std::chrono::milliseconds(2));
     times = mRefreshRateStats->getTotalTimes();
-    // Because the power mode is not HWC_POWER_MODE_NORMAL, switching the config
+    // Because the power mode is not PowerMode::ON, switching the config
     // does not update refresh rates that come from the config.
     EXPECT_LT(screenOff, times["ScreenOff"]);
     EXPECT_EQ(ninety, times["90fps"]);
@@ -158,7 +158,7 @@
     EXPECT_LT(screenOff, times["ScreenOff"]);
 
     mRefreshRateStats->setConfigMode(CONFIG_ID_0);
-    mRefreshRateStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mRefreshRateStats->setPowerMode(PowerMode::ON);
     screenOff = mRefreshRateStats->getTotalTimes()["ScreenOff"];
     std::this_thread::sleep_for(std::chrono::milliseconds(2));
     times = mRefreshRateStats->getTotalTimes();
@@ -192,9 +192,9 @@
     EXPECT_EQ(ninety, times["90fps"]);
     EXPECT_LT(sixty, times["60fps"]);
 
-    // Because the power mode is not HWC_POWER_MODE_NORMAL, switching the config
+    // Because the power mode is not PowerMode::ON, switching the config
     // does not update refresh rates that come from the config.
-    mRefreshRateStats->setPowerMode(HWC_POWER_MODE_DOZE);
+    mRefreshRateStats->setPowerMode(PowerMode::DOZE);
     mRefreshRateStats->setConfigMode(CONFIG_ID_0);
     sixty = mRefreshRateStats->getTotalTimes()["60fps"];
     std::this_thread::sleep_for(std::chrono::milliseconds(2));
diff --git a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
index b069085..0d6c799 100644
--- a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
@@ -178,10 +178,10 @@
 
     auto primaryDispSync = std::make_unique<mock::DispSync>();
 
-    EXPECT_CALL(*primaryDispSync, computeNextRefresh(0)).WillRepeatedly(Return(0));
+    EXPECT_CALL(*primaryDispSync, computeNextRefresh(0, _)).WillRepeatedly(Return(0));
     EXPECT_CALL(*primaryDispSync, getPeriod())
             .WillRepeatedly(Return(FakeHwcDisplayInjector::DEFAULT_REFRESH_RATE));
-    EXPECT_CALL(*primaryDispSync, expectedPresentTime()).WillRepeatedly(Return(0));
+    EXPECT_CALL(*primaryDispSync, expectedPresentTime(_)).WillRepeatedly(Return(0));
     mFlinger.setupScheduler(std::move(primaryDispSync),
                             std::make_unique<mock::EventControlThread>(), std::move(eventThread),
                             std::move(sfEventThread));
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index 6995ee0..add3327 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -57,6 +57,8 @@
 
 } // namespace Hwc2
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 namespace surfaceflinger::test {
 
 class Factory final : public surfaceflinger::Factory {
@@ -210,7 +212,7 @@
         mFlinger->mRefreshRateStats = std::make_unique<
                 scheduler::RefreshRateStats>(*mFlinger->mRefreshRateConfigs, *mFlinger->mTimeStats,
                                              /*currentConfig=*/HwcConfigIndexType(0),
-                                             /*powerMode=*/HWC_POWER_MODE_OFF);
+                                             /*powerMode=*/hal::PowerMode::OFF);
         mFlinger->mPhaseConfiguration =
                 mFactory.createPhaseConfiguration(*mFlinger->mRefreshRateConfigs);
 
@@ -257,12 +259,12 @@
         layer->editCompositionState()->sidebandStream = sidebandStream;
     }
 
-    void setLayerCompositionType(sp<Layer> layer, HWC2::Composition type) {
+    void setLayerCompositionType(sp<Layer> layer, hal::Composition type) {
         auto outputLayer = layer->findOutputLayerForDisplay(mFlinger->getDefaultDisplayDevice());
         LOG_ALWAYS_FATAL_IF(!outputLayer);
         auto& state = outputLayer->editState();
         LOG_ALWAYS_FATAL_IF(!outputLayer->getState().hwc);
-        (*state.hwc).hwcCompositionType = static_cast<Hwc2::IComposerClient::Composition>(type);
+        (*state.hwc).hwcCompositionType = type;
     };
 
     void setLayerPotentialCursor(sp<Layer> layer, bool potentialCursor) {
@@ -298,8 +300,8 @@
         return mFlinger->handleTransactionLocked(transactionFlags);
     }
 
-    auto onHotplugReceived(int32_t sequenceId, hwc2_display_t display,
-                           HWC2::Connection connection) {
+    auto onHotplugReceived(int32_t sequenceId, hal::HWDisplayId display,
+                           hal::Connection connection) {
         return mFlinger->onHotplugReceived(sequenceId, display, connection);
     }
 
@@ -315,19 +317,20 @@
 
     // Allow reading display state without locking, as if called on the SF main thread.
     auto setPowerModeInternal(const sp<DisplayDevice>& display,
-                              int mode) NO_THREAD_SAFETY_ANALYSIS {
+                              hal::PowerMode mode) NO_THREAD_SAFETY_ANALYSIS {
         return mFlinger->setPowerModeInternal(display, mode);
     }
 
-    auto onMessageReceived(int32_t what) { return mFlinger->onMessageReceived(what); }
+    auto onMessageReceived(int32_t what) { return mFlinger->onMessageReceived(what, systemTime()); }
 
-    auto captureScreenImplLocked(
-            const RenderArea& renderArea, SurfaceFlinger::TraverseLayersFunction traverseLayers,
-            ANativeWindowBuffer* buffer, bool useIdentityTransform, bool forSystem, int* outSyncFd) {
+    auto captureScreenImplLocked(const RenderArea& renderArea,
+                                 SurfaceFlinger::TraverseLayersFunction traverseLayers,
+                                 ANativeWindowBuffer* buffer, bool useIdentityTransform,
+                                 bool forSystem, int* outSyncFd, bool regionSampling) {
         bool ignored;
         return mFlinger->captureScreenImplLocked(renderArea, traverseLayers, buffer,
                                                  useIdentityTransform, forSystem, outSyncFd,
-                                                 ignored);
+                                                 regionSampling, ignored);
     }
 
     auto traverseLayersInDisplay(const sp<const DisplayDevice>& display,
@@ -402,7 +405,6 @@
     auto& mutableUseFrameRateApi() { return mFlinger->useFrameRateApi; }
 
     auto fromHandle(const sp<IBinder>& handle) {
-        Mutex::Autolock _l(mFlinger->mStateLock);
         return mFlinger->fromHandle(handle);
     }
 
@@ -428,12 +430,12 @@
      */
     struct HWC2Display : public HWC2::impl::Display {
         HWC2Display(Hwc2::Composer& composer,
-                    const std::unordered_set<HWC2::Capability>& capabilities, hwc2_display_t id,
-                    HWC2::DisplayType type)
+                    const std::unordered_set<hal::Capability>& capabilities, hal::HWDisplayId id,
+                    hal::DisplayType type)
               : HWC2::impl::Display(composer, capabilities, id, type) {}
         ~HWC2Display() {
             // Prevents a call to disable vsyncs.
-            mType = HWC2::DisplayType::Invalid;
+            mType = hal::DisplayType::INVALID;
         }
 
         auto& mutableIsConnected() { return this->mIsConnected; }
@@ -443,20 +445,19 @@
 
     class FakeHwcDisplayInjector {
     public:
-        static constexpr hwc2_display_t DEFAULT_HWC_DISPLAY_ID = 1000;
+        static constexpr hal::HWDisplayId DEFAULT_HWC_DISPLAY_ID = 1000;
         static constexpr int32_t DEFAULT_WIDTH = 1920;
         static constexpr int32_t DEFAULT_HEIGHT = 1280;
         static constexpr int32_t DEFAULT_REFRESH_RATE = 16'666'666;
         static constexpr int32_t DEFAULT_CONFIG_GROUP = 7;
         static constexpr int32_t DEFAULT_DPI = 320;
-        static constexpr hwc2_config_t DEFAULT_ACTIVE_CONFIG = 0;
-        static constexpr int32_t DEFAULT_POWER_MODE = 2;
+        static constexpr hal::HWConfigId DEFAULT_ACTIVE_CONFIG = 0;
+        static constexpr hal::PowerMode DEFAULT_POWER_MODE = hal::PowerMode::ON;
 
-        FakeHwcDisplayInjector(DisplayId displayId, HWC2::DisplayType hwcDisplayType,
-                               bool isPrimary)
+        FakeHwcDisplayInjector(DisplayId displayId, hal::DisplayType hwcDisplayType, bool isPrimary)
               : mDisplayId(displayId), mHwcDisplayType(hwcDisplayType), mIsPrimary(isPrimary) {}
 
-        auto& setHwcDisplayId(hwc2_display_t displayId) {
+        auto& setHwcDisplayId(hal::HWDisplayId displayId) {
             mHwcDisplayId = displayId;
             return *this;
         }
@@ -486,23 +487,23 @@
             return *this;
         }
 
-        auto& setActiveConfig(hwc2_config_t config) {
+        auto& setActiveConfig(hal::HWConfigId config) {
             mActiveConfig = config;
             return *this;
         }
 
-        auto& setCapabilities(const std::unordered_set<HWC2::Capability>* capabilities) {
+        auto& setCapabilities(const std::unordered_set<hal::Capability>* capabilities) {
             mCapabilities = capabilities;
             return *this;
         }
 
-        auto& setPowerMode(int mode) {
+        auto& setPowerMode(hal::PowerMode mode) {
             mPowerMode = mode;
             return *this;
         }
 
         void inject(TestableSurfaceFlinger* flinger, Hwc2::Composer* composer) {
-            static const std::unordered_set<HWC2::Capability> defaultCapabilities;
+            static const std::unordered_set<hal::Capability> defaultCapabilities;
             if (mCapabilities == nullptr) mCapabilities = &defaultCapabilities;
 
             // Caution - Make sure that any values passed by reference here do
@@ -521,11 +522,11 @@
             config.setConfigGroup(mConfigGroup);
             display->mutableConfigs().emplace(static_cast<int32_t>(mActiveConfig), config.build());
             display->mutableIsConnected() = true;
-            display->setPowerMode(static_cast<HWC2::PowerMode>(mPowerMode));
+            display->setPowerMode(mPowerMode);
 
             flinger->mutableHwcDisplayData()[mDisplayId].hwcDisplay = std::move(display);
 
-            if (mHwcDisplayType == HWC2::DisplayType::Physical) {
+            if (mHwcDisplayType == hal::DisplayType::PHYSICAL) {
                 flinger->mutableHwcPhysicalDisplayIdMap().emplace(mHwcDisplayId, mDisplayId);
                 (mIsPrimary ? flinger->mutableInternalHwcDisplayId()
                             : flinger->mutableExternalHwcDisplayId()) = mHwcDisplayId;
@@ -534,19 +535,19 @@
 
     private:
         const DisplayId mDisplayId;
-        const HWC2::DisplayType mHwcDisplayType;
+        const hal::DisplayType mHwcDisplayType;
         const bool mIsPrimary;
 
-        hwc2_display_t mHwcDisplayId = DEFAULT_HWC_DISPLAY_ID;
+        hal::HWDisplayId mHwcDisplayId = DEFAULT_HWC_DISPLAY_ID;
         int32_t mWidth = DEFAULT_WIDTH;
         int32_t mHeight = DEFAULT_HEIGHT;
         int32_t mRefreshRate = DEFAULT_REFRESH_RATE;
         int32_t mDpiX = DEFAULT_DPI;
         int32_t mConfigGroup = DEFAULT_CONFIG_GROUP;
         int32_t mDpiY = DEFAULT_DPI;
-        hwc2_config_t mActiveConfig = DEFAULT_ACTIVE_CONFIG;
-        int32_t mPowerMode = DEFAULT_POWER_MODE;
-        const std::unordered_set<HWC2::Capability>* mCapabilities = nullptr;
+        hal::HWConfigId mActiveConfig = DEFAULT_ACTIVE_CONFIG;
+        hal::PowerMode mPowerMode = DEFAULT_POWER_MODE;
+        const std::unordered_set<hal::Capability>* mCapabilities = nullptr;
     };
 
     class FakeDisplayDeviceInjector {
@@ -554,7 +555,7 @@
         FakeDisplayDeviceInjector(TestableSurfaceFlinger& flinger,
                                   std::shared_ptr<compositionengine::Display> compositionDisplay,
                                   std::optional<DisplayConnectionType> connectionType,
-                                  std::optional<hwc2_display_t> hwcDisplayId, bool isPrimary)
+                                  std::optional<hal::HWDisplayId> hwcDisplayId, bool isPrimary)
               : mFlinger(flinger),
                 mCreationArgs(flinger.mFlinger.get(), mDisplayToken, compositionDisplay),
                 mHwcDisplayId(hwcDisplayId) {
@@ -597,7 +598,7 @@
             return *this;
         }
 
-        auto& setPowerMode(int mode) {
+        auto& setPowerMode(hal::PowerMode mode) {
             mCreationArgs.initialPowerMode = mode;
             return *this;
         }
@@ -647,7 +648,7 @@
         TestableSurfaceFlinger& mFlinger;
         sp<BBinder> mDisplayToken = new BBinder();
         DisplayDeviceCreationArgs mCreationArgs;
-        const std::optional<hwc2_display_t> mHwcDisplayId;
+        const std::optional<hal::HWDisplayId> mHwcDisplayId;
     };
 
     surfaceflinger::test::Factory mFactory;
diff --git a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
index 1f04673..7a1c7c6 100644
--- a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
@@ -51,6 +51,8 @@
 using testing::StrEq;
 using testing::UnorderedElementsAre;
 
+using PowerMode = hardware::graphics::composer::V2_4::IComposerClient::PowerMode;
+
 // clang-format off
 #define FMT_PROTO          true
 #define FMT_STRING         false
@@ -377,9 +379,24 @@
     EXPECT_THAT(result, HasSubstr(expectedResult));
 }
 
+TEST_F(TimeStatsTest, canIncreaseCompositionStrategyChanges) {
+    // this stat is not in the proto so verify by checking the string dump
+    constexpr size_t COMPOSITION_STRATEGY_CHANGES = 2;
+
+    EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
+    for (size_t i = 0; i < COMPOSITION_STRATEGY_CHANGES; i++) {
+        ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementCompositionStrategyChanges());
+    }
+
+    const std::string result(inputCommand(InputCommand::DUMP_ALL, FMT_STRING));
+    const std::string expectedResult =
+            "compositionStrategyChanges = " + std::to_string(COMPOSITION_STRATEGY_CHANGES);
+    EXPECT_THAT(result, HasSubstr(expectedResult));
+}
+
 TEST_F(TimeStatsTest, canAverageFrameDuration) {
     EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
-    mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mTimeStats->setPowerMode(PowerMode::ON);
     mTimeStats
             ->recordFrameDuration(std::chrono::duration_cast<std::chrono::nanoseconds>(1ms).count(),
                                   std::chrono::duration_cast<std::chrono::nanoseconds>(6ms)
@@ -408,7 +425,7 @@
                                                    .count());
 
     // Push a dummy present fence to trigger flushing the RenderEngine timings.
-    mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mTimeStats->setPowerMode(PowerMode::ON);
     mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(
             std::chrono::duration_cast<std::chrono::nanoseconds>(1ms).count()));
 
@@ -424,13 +441,13 @@
     ASSERT_NO_FATAL_FAILURE(
             mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(2000000)));
 
-    ASSERT_NO_FATAL_FAILURE(mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL));
+    ASSERT_NO_FATAL_FAILURE(mTimeStats->setPowerMode(PowerMode::ON));
     ASSERT_NO_FATAL_FAILURE(
             mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(3000000)));
     ASSERT_NO_FATAL_FAILURE(
             mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(5000000)));
 
-    ASSERT_NO_FATAL_FAILURE(mTimeStats->setPowerMode(HWC_POWER_MODE_OFF));
+    ASSERT_NO_FATAL_FAILURE(mTimeStats->setPowerMode(PowerMode::OFF));
     ASSERT_NO_FATAL_FAILURE(
             mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(6000000)));
     ASSERT_NO_FATAL_FAILURE(
@@ -448,12 +465,12 @@
 TEST_F(TimeStatsTest, canInsertGlobalFrameDuration) {
     EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
 
-    mTimeStats->setPowerMode(HWC_POWER_MODE_OFF);
+    mTimeStats->setPowerMode(PowerMode::OFF);
     mTimeStats
             ->recordFrameDuration(std::chrono::duration_cast<std::chrono::nanoseconds>(1ms).count(),
                                   std::chrono::duration_cast<std::chrono::nanoseconds>(5ms)
                                           .count());
-    mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mTimeStats->setPowerMode(PowerMode::ON);
     mTimeStats
             ->recordFrameDuration(std::chrono::duration_cast<std::chrono::nanoseconds>(3ms).count(),
                                   std::chrono::duration_cast<std::chrono::nanoseconds>(6ms)
@@ -489,7 +506,7 @@
     ASSERT_EQ(0, preFlushProto.render_engine_timing_size());
 
     // Push a dummy present fence to trigger flushing the RenderEngine timings.
-    mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mTimeStats->setPowerMode(PowerMode::ON);
     mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(
             std::chrono::duration_cast<std::chrono::nanoseconds>(1ms).count()));
 
@@ -724,7 +741,7 @@
     ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementTotalFrames());
     ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementMissedFrames());
     ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementClientCompositionFrames());
-    ASSERT_NO_FATAL_FAILURE(mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL));
+    ASSERT_NO_FATAL_FAILURE(mTimeStats->setPowerMode(PowerMode::ON));
 
     mTimeStats
             ->recordFrameDuration(std::chrono::duration_cast<std::chrono::nanoseconds>(3ms).count(),
@@ -760,7 +777,8 @@
     EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
     ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementClientCompositionReusedFrames());
     ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementRefreshRateSwitches());
-    mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementCompositionStrategyChanges());
+    mTimeStats->setPowerMode(PowerMode::ON);
     mTimeStats
             ->recordFrameDuration(std::chrono::duration_cast<std::chrono::nanoseconds>(1ms).count(),
                                   std::chrono::duration_cast<std::chrono::nanoseconds>(5ms)
@@ -776,6 +794,7 @@
     const std::string result(inputCommand(InputCommand::DUMP_ALL, FMT_STRING));
     EXPECT_THAT(result, HasSubstr("clientCompositionReusedFrames = 0"));
     EXPECT_THAT(result, HasSubstr("refreshRateSwitches = 0"));
+    EXPECT_THAT(result, HasSubstr("compositionStrategyChanges = 0"));
     EXPECT_THAT(result, HasSubstr("averageFrameDuration = 0.000 ms"));
     EXPECT_THAT(result, HasSubstr("averageRenderEngineTiming = 0.000 ms"));
 }
@@ -877,7 +896,7 @@
     }
 
     mTimeStats->recordDisplayEventConnectionCount(DISPLAY_EVENT_CONNECTIONS);
-    mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mTimeStats->setPowerMode(PowerMode::ON);
     mTimeStats->recordFrameDuration(1000000, 3000000);
     mTimeStats->recordRenderEngineDuration(2000000, 4000000);
     mTimeStats->recordRenderEngineDuration(2000000, std::make_shared<FenceTime>(3000000));
@@ -1057,7 +1076,7 @@
     insertTimeRecord(NORMAL_SEQUENCE, LAYER_ID_0, 4, 5000000);
 
     // Now make sure that TimeStats flushes global stats to set the callback.
-    mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
+    mTimeStats->setPowerMode(PowerMode::ON);
     mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(3000000));
     mTimeStats->setPresentFenceGlobal(std::make_shared<FenceTime>(5000000));
     EXPECT_THAT(mDelegate->mAtomTags,
diff --git a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
index f1739e5..2a48a22 100644
--- a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
@@ -76,7 +76,7 @@
                         new EventThreadConnection(sfEventThread.get(), ResyncCallback(),
                                                   ISurfaceComposer::eConfigChangedSuppress)));
 
-        EXPECT_CALL(*mPrimaryDispSync, computeNextRefresh(0)).WillRepeatedly(Return(0));
+        EXPECT_CALL(*mPrimaryDispSync, computeNextRefresh(0, _)).WillRepeatedly(Return(0));
         EXPECT_CALL(*mPrimaryDispSync, getPeriod())
                 .WillRepeatedly(Return(FakeHwcDisplayInjector::DEFAULT_REFRESH_RATE));
 
@@ -126,7 +126,7 @@
         ASSERT_EQ(0, mFlinger.getTransactionQueue().size());
         // called in SurfaceFlinger::signalTransaction
         EXPECT_CALL(*mMessageQueue, invalidate()).Times(1);
-        EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime()).WillOnce(Return(systemTime()));
+        EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime(_)).WillOnce(Return(systemTime()));
         TransactionInfo transaction;
         setupSingle(transaction, flags, syncInputWindows,
                     /*desiredPresentTime*/ -1);
@@ -159,7 +159,7 @@
         // first check will see desired present time has not passed,
         // but afterwards it will look like the desired present time has passed
         nsecs_t time = systemTime();
-        EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime())
+        EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime(_))
                 .WillOnce(Return(time + nsecs_t(5 * 1e8)));
         TransactionInfo transaction;
         setupSingle(transaction, flags, syncInputWindows,
@@ -182,7 +182,7 @@
         // called in SurfaceFlinger::signalTransaction
         nsecs_t time = systemTime();
         EXPECT_CALL(*mMessageQueue, invalidate()).Times(1);
-        EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime())
+        EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime(_))
                 .WillOnce(Return(time + nsecs_t(5 * 1e8)));
         // transaction that should go on the pending thread
         TransactionInfo transactionA;
@@ -247,7 +247,7 @@
     EXPECT_CALL(*mMessageQueue, invalidate()).Times(1);
 
     // nsecs_t time = systemTime();
-    EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime())
+    EXPECT_CALL(*mPrimaryDispSync, expectedPresentTime(_))
             .WillOnce(Return(nsecs_t(5 * 1e8)))
             .WillOnce(Return(s2ns(2)));
     TransactionInfo transactionA; // transaction to go on pending queue
@@ -322,7 +322,7 @@
 TEST_F(TransactionApplicationTest, FromHandle) {
     sp<IBinder> badHandle;
     auto ret = mFlinger.fromHandle(badHandle);
-    EXPECT_EQ(nullptr, ret.get());
+    EXPECT_EQ(nullptr, ret.promote().get());
 }
 } // namespace android
 
diff --git a/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp b/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp
index 4f150ef..3f14d65 100644
--- a/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp
@@ -135,7 +135,7 @@
 
 class StubCallback : public DispSync::Callback {
 public:
-    void onDispSyncEvent(nsecs_t when) final {
+    void onDispSyncEvent(nsecs_t when, nsecs_t /*expectedVSyncTimestamp*/) final {
         std::lock_guard<std::mutex> lk(mMutex);
         mLastCallTime = when;
     }
@@ -270,7 +270,7 @@
             .Times(1)
             .WillOnce(Return(fakeTimestamp));
 
-    EXPECT_THAT(mReactor.computeNextRefresh(0), Eq(fakeTimestamp));
+    EXPECT_THAT(mReactor.computeNextRefresh(0, mMockClock->now()), Eq(fakeTimestamp));
 }
 
 TEST_F(VSyncReactorTest, queriesTrackerForExpectedPresentTime) {
@@ -280,7 +280,7 @@
             .Times(1)
             .WillOnce(Return(fakeTimestamp));
 
-    EXPECT_THAT(mReactor.expectedPresentTime(), Eq(fakeTimestamp));
+    EXPECT_THAT(mReactor.expectedPresentTime(mMockClock->now()), Eq(fakeTimestamp));
 }
 
 TEST_F(VSyncReactorTest, queriesTrackerForNextRefreshFuture) {
@@ -292,7 +292,7 @@
     EXPECT_CALL(*mMockTracker, currentPeriod()).WillOnce(Return(fakePeriod));
     EXPECT_CALL(*mMockTracker, nextAnticipatedVSyncTimeFrom(mFakeNow + numPeriodsOut * fakePeriod))
             .WillOnce(Return(fakeTimestamp));
-    EXPECT_THAT(mReactor.computeNextRefresh(numPeriodsOut), Eq(fakeTimestamp));
+    EXPECT_THAT(mReactor.computeNextRefresh(numPeriodsOut, mMockClock->now()), Eq(fakeTimestamp));
 }
 
 TEST_F(VSyncReactorTest, getPeriod) {
@@ -544,7 +544,9 @@
     class SelfRemovingCallback : public DispSync::Callback {
     public:
         SelfRemovingCallback(VSyncReactor& vsr) : mVsr(vsr) {}
-        void onDispSyncEvent(nsecs_t when) final { mVsr.removeEventListener(this, &when); }
+        void onDispSyncEvent(nsecs_t when, nsecs_t /*expectedVSyncTimestamp*/) final {
+            mVsr.removeEventListener(this, &when);
+        }
 
     private:
         VSyncReactor& mVsr;
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplay.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplay.h
index 3968035..67d3e1c 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplay.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplay.h
@@ -20,78 +20,80 @@
 
 #include "DisplayHardware/HWC2.h"
 
-using HWC2::Error;
-using HWC2::Layer;
+using android::HWC2::Layer;
 
 namespace android {
 namespace Hwc2 {
 namespace mock {
 
+namespace hal = android::hardware::graphics::composer::hal;
+
 class Display : public HWC2::Display {
 public:
-    using Error = ::Error;
     using Layer = ::Layer;
 
     Display();
     ~Display();
 
-    MOCK_CONST_METHOD0(getId, hwc2_layer_t());
+    MOCK_CONST_METHOD0(getId, hal::HWDisplayId());
     MOCK_CONST_METHOD0(isConnected, bool());
     MOCK_METHOD1(setConnected, void(bool));
-    MOCK_CONST_METHOD0(getCapabilities, const std::unordered_set<HWC2::DisplayCapability>&());
+    MOCK_CONST_METHOD0(getCapabilities, const std::unordered_set<hal::DisplayCapability>&());
 
-    MOCK_METHOD0(acceptChanges, Error());
-    MOCK_METHOD1(createLayer, Error(Layer**));
-    MOCK_METHOD1(destroyLayer, Error(Layer*));
-    MOCK_CONST_METHOD1(getActiveConfig, Error(std::shared_ptr<const Config>*));
-    MOCK_CONST_METHOD1(getActiveConfigIndex, Error(int* outIndex));
-    MOCK_METHOD1(getChangedCompositionTypes, Error(std::unordered_map<Layer*, HWC2::Composition>*));
-    MOCK_CONST_METHOD1(getColorModes, Error(std::vector<android::ui::ColorMode>*));
+    MOCK_METHOD0(acceptChanges, hal::Error());
+    MOCK_METHOD1(createLayer, hal::Error(Layer**));
+    MOCK_METHOD1(destroyLayer, hal::Error(Layer*));
+    MOCK_CONST_METHOD1(getActiveConfig, hal::Error(std::shared_ptr<const Config>*));
+    MOCK_CONST_METHOD1(getActiveConfigIndex, hal::Error(int* outIndex));
+    MOCK_METHOD1(getChangedCompositionTypes,
+                 hal::Error(std::unordered_map<Layer*, hal::Composition>*));
+    MOCK_CONST_METHOD1(getColorModes, hal::Error(std::vector<hal::ColorMode>*));
 
     MOCK_CONST_METHOD0(getSupportedPerFrameMetadata, int32_t());
     MOCK_CONST_METHOD2(getRenderIntents,
-                       Error(android::ui::ColorMode, std::vector<android::ui::RenderIntent>*));
-    MOCK_METHOD2(getDataspaceSaturationMatrix, Error(android::ui::Dataspace, android::mat4*));
+                       hal::Error(hal::ColorMode, std::vector<hal::RenderIntent>*));
+    MOCK_METHOD2(getDataspaceSaturationMatrix, hal::Error(hal::Dataspace, android::mat4*));
     MOCK_CONST_METHOD0(getConfigs, std::vector<std::shared_ptr<const Config>>());
 
-    MOCK_CONST_METHOD1(getName, Error(std::string*));
+    MOCK_CONST_METHOD1(getName, hal::Error(std::string*));
     MOCK_METHOD2(getRequests,
-                 Error(HWC2::DisplayRequest*, std::unordered_map<Layer*, HWC2::LayerRequest>*));
-    MOCK_CONST_METHOD1(getType, Error(HWC2::DisplayType*));
-    MOCK_CONST_METHOD1(supportsDoze, Error(bool*));
-    MOCK_CONST_METHOD1(getHdrCapabilities, Error(android::HdrCapabilities*));
+                 hal::Error(hal::DisplayRequest*, std::unordered_map<Layer*, hal::LayerRequest>*));
+    MOCK_CONST_METHOD1(getType, hal::Error(hal::DisplayType*));
+    MOCK_CONST_METHOD1(supportsDoze, hal::Error(bool*));
+    MOCK_CONST_METHOD1(getHdrCapabilities, hal::Error(android::HdrCapabilities*));
     MOCK_CONST_METHOD3(getDisplayedContentSamplingAttributes,
-                       Error(android::ui::PixelFormat*, android::ui::Dataspace*, uint8_t*));
-    MOCK_CONST_METHOD3(setDisplayContentSamplingEnabled, Error(bool, uint8_t, uint64_t));
+                       hal::Error(hal::PixelFormat*, hal::Dataspace*, uint8_t*));
+    MOCK_CONST_METHOD3(setDisplayContentSamplingEnabled, hal::Error(bool, uint8_t, uint64_t));
     MOCK_CONST_METHOD3(getDisplayedContentSample,
-                       Error(uint64_t, uint64_t, android::DisplayedFrameStats*));
-    MOCK_CONST_METHOD1(getReleaseFences,
-                       Error(std::unordered_map<Layer*, android::sp<android::Fence>>* outFences));
-    MOCK_METHOD1(present, Error(android::sp<android::Fence>*));
-    MOCK_METHOD1(setActiveConfig, Error(const std::shared_ptr<const HWC2::Display::Config>&));
+                       hal::Error(uint64_t, uint64_t, android::DisplayedFrameStats*));
+    MOCK_CONST_METHOD1(
+            getReleaseFences,
+            hal::Error(std::unordered_map<Layer*, android::sp<android::Fence>>* outFences));
+    MOCK_METHOD1(present, hal::Error(android::sp<android::Fence>*));
+    MOCK_METHOD1(setActiveConfig, hal::Error(const std::shared_ptr<const HWC2::Display::Config>&));
     MOCK_METHOD4(setClientTarget,
-                 Error(uint32_t, const android::sp<android::GraphicBuffer>&,
-                       const android::sp<android::Fence>&, android::ui::Dataspace));
-    MOCK_METHOD2(setColorMode, Error(android::ui::ColorMode, android::ui::RenderIntent));
-    MOCK_METHOD2(setColorTransform, Error(const android::mat4&, android_color_transform_t));
+                 hal::Error(uint32_t, const android::sp<android::GraphicBuffer>&,
+                            const android::sp<android::Fence>&, hal::Dataspace));
+    MOCK_METHOD2(setColorMode, hal::Error(hal::ColorMode, hal::RenderIntent));
+    MOCK_METHOD2(setColorTransform, hal::Error(const android::mat4&, hal::ColorTransform));
     MOCK_METHOD2(setOutputBuffer,
-                 Error(const android::sp<android::GraphicBuffer>&,
-                       const android::sp<android::Fence>&));
-    MOCK_METHOD1(setPowerMode, Error(HWC2::PowerMode));
-    MOCK_METHOD1(setVsyncEnabled, Error(HWC2::Vsync));
-    MOCK_METHOD2(validate, Error(uint32_t*, uint32_t*));
+                 hal::Error(const android::sp<android::GraphicBuffer>&,
+                            const android::sp<android::Fence>&));
+    MOCK_METHOD1(setPowerMode, hal::Error(hal::PowerMode));
+    MOCK_METHOD1(setVsyncEnabled, hal::Error(hal::Vsync));
+    MOCK_METHOD2(validate, hal::Error(uint32_t*, uint32_t*));
     MOCK_METHOD4(presentOrValidate,
-                 Error(uint32_t*, uint32_t*, android::sp<android::Fence>*, uint32_t*));
-    MOCK_CONST_METHOD1(setDisplayBrightness, Error(float));
-    MOCK_CONST_METHOD1(getDisplayVsyncPeriod, Error(nsecs_t*));
+                 hal::Error(uint32_t*, uint32_t*, android::sp<android::Fence>*, uint32_t*));
+    MOCK_CONST_METHOD1(setDisplayBrightness, hal::Error(float));
+    MOCK_CONST_METHOD1(getDisplayVsyncPeriod, hal::Error(nsecs_t*));
     MOCK_METHOD3(setActiveConfigWithConstraints,
-                 Error(const std::shared_ptr<const HWC2::Display::Config>&,
-                       const HWC2::VsyncPeriodChangeConstraints&,
-                       HWC2::VsyncPeriodChangeTimeline*));
-    MOCK_CONST_METHOD1(setAutoLowLatencyMode, Error(bool on));
-    MOCK_CONST_METHOD1(getSupportedContentTypes, Error(std::vector<HWC2::ContentType>*));
-    MOCK_CONST_METHOD1(setContentType, Error(HWC2::ContentType));
-    MOCK_CONST_METHOD1(getConnectionType, Error(android::DisplayConnectionType*));
+                 hal::Error(const std::shared_ptr<const HWC2::Display::Config>&,
+                            const hal::VsyncPeriodChangeConstraints&,
+                            hal::VsyncPeriodChangeTimeline*));
+    MOCK_CONST_METHOD1(setAutoLowLatencyMode, hal::Error(bool on));
+    MOCK_CONST_METHOD1(getSupportedContentTypes, hal::Error(std::vector<hal::ContentType>*));
+    MOCK_CONST_METHOD1(setContentType, hal::Error(hal::ContentType));
+    MOCK_CONST_METHOD1(getConnectionType, hal::Error(android::DisplayConnectionType*));
     MOCK_CONST_METHOD0(isVsyncPeriodSwitchSupported, bool());
 };
 
diff --git a/services/surfaceflinger/tests/unittests/mock/MockDispSync.cpp b/services/surfaceflinger/tests/unittests/mock/MockDispSync.cpp
index f6c4f62..1c8c44d 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockDispSync.cpp
+++ b/services/surfaceflinger/tests/unittests/mock/MockDispSync.cpp
@@ -17,6 +17,7 @@
 #include "mock/MockDispSync.h"
 #include <thread>
 
+using namespace std::chrono_literals;
 namespace android {
 namespace mock {
 
@@ -54,8 +55,9 @@
 void DispSync::triggerCallback() {
     if (mCallback.callback == nullptr) return;
 
-    mCallback.callback->onDispSyncEvent(
-            std::chrono::steady_clock::now().time_since_epoch().count());
+    const std::chrono::nanoseconds now = std::chrono::steady_clock::now().time_since_epoch();
+    const auto expectedVSyncTime = now + 16ms;
+    mCallback.callback->onDispSyncEvent(now.count(), expectedVSyncTime.count());
 }
 
 } // namespace mock
diff --git a/services/surfaceflinger/tests/unittests/mock/MockDispSync.h b/services/surfaceflinger/tests/unittests/mock/MockDispSync.h
index a2ae6c9..b39487c 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockDispSync.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockDispSync.h
@@ -37,9 +37,9 @@
     MOCK_METHOD0(getPeriod, nsecs_t());
     MOCK_METHOD0(getIntendedPeriod, nsecs_t());
     MOCK_METHOD1(setRefreshSkipCount, void(int));
-    MOCK_CONST_METHOD1(computeNextRefresh, nsecs_t(int));
+    MOCK_CONST_METHOD2(computeNextRefresh, nsecs_t(int, nsecs_t));
     MOCK_METHOD1(setIgnorePresentFences, void(bool));
-    MOCK_METHOD0(expectedPresentTime, nsecs_t());
+    MOCK_METHOD1(expectedPresentTime, nsecs_t(nsecs_t));
 
     MOCK_CONST_METHOD1(dump, void(std::string&));
 
diff --git a/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.cpp b/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.cpp
index 97a13e4..5fb06fd 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.cpp
+++ b/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.cpp
@@ -16,12 +16,15 @@
 
 #include "mock/MockMessageQueue.h"
 
-namespace android {
-namespace mock {
+namespace android::mock {
 
-// Explicit default instantiation is recommended.
-MessageQueue::MessageQueue() = default;
+MessageQueue::MessageQueue() {
+    ON_CALL(*this, postMessage).WillByDefault([](sp<MessageHandler>&& handler) {
+        // Execute task to prevent broken promise exception on destruction.
+        handler->handleMessage(Message());
+    });
+}
+
 MessageQueue::~MessageQueue() = default;
 
-} // namespace mock
-} // namespace android
\ No newline at end of file
+} // namespace android::mock
diff --git a/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.h b/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.h
index e781c0a..a82b583 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockMessageQueue.h
@@ -21,8 +21,7 @@
 #include "Scheduler/EventThread.h"
 #include "Scheduler/MessageQueue.h"
 
-namespace android {
-namespace mock {
+namespace android::mock {
 
 class MessageQueue : public android::MessageQueue {
 public:
@@ -32,10 +31,9 @@
     MOCK_METHOD1(init, void(const sp<SurfaceFlinger>&));
     MOCK_METHOD1(setEventConnection, void(const sp<EventThreadConnection>& connection));
     MOCK_METHOD0(waitMessage, void());
-    MOCK_METHOD2(postMessage, status_t(const sp<MessageBase>&, nsecs_t));
+    MOCK_METHOD1(postMessage, void(sp<MessageHandler>&&));
     MOCK_METHOD0(invalidate, void());
     MOCK_METHOD0(refresh, void());
 };
 
-} // namespace mock
-} // namespace android
+} // namespace android::mock
diff --git a/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h b/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
index 9ea4dd0..4186e2b 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
@@ -37,6 +37,7 @@
     MOCK_METHOD0(incrementClientCompositionFrames, void());
     MOCK_METHOD0(incrementClientCompositionReusedFrames, void());
     MOCK_METHOD0(incrementRefreshRateSwitches, void());
+    MOCK_METHOD0(incrementCompositionStrategyChanges, void());
     MOCK_METHOD1(recordDisplayEventConnectionCount, void(int32_t));
     MOCK_METHOD2(recordFrameDuration, void(nsecs_t, nsecs_t));
     MOCK_METHOD2(recordRenderEngineDuration, void(nsecs_t, nsecs_t));
@@ -52,7 +53,8 @@
     MOCK_METHOD3(setPresentFence, void(int32_t, uint64_t, const std::shared_ptr<FenceTime>&));
     MOCK_METHOD1(onDestroy, void(int32_t));
     MOCK_METHOD2(removeTimeRecord, void(int32_t, uint64_t));
-    MOCK_METHOD1(setPowerMode, void(int32_t));
+    MOCK_METHOD1(setPowerMode,
+                 void(hardware::graphics::composer::V2_4::IComposerClient::PowerMode));
     MOCK_METHOD2(recordRefreshRate, void(uint32_t, nsecs_t));
     MOCK_METHOD1(setPresentFenceGlobal, void(const std::shared_ptr<FenceTime>&));
 };
diff --git a/services/surfaceflinger/tests/utils/TransactionUtils.h b/services/surfaceflinger/tests/utils/TransactionUtils.h
index 2c63da0..8e1f943 100644
--- a/services/surfaceflinger/tests/utils/TransactionUtils.h
+++ b/services/surfaceflinger/tests/utils/TransactionUtils.h
@@ -17,18 +17,13 @@
 #pragma once
 
 #include <chrono>
-#include <gtest/gtest.h>
 
 #include <android/native_window.h>
-#include <hardware/hwcomposer_defs.h>
-
 #include <binder/IPCThreadState.h>
-
+#include <gtest/gtest.h>
 #include <gui/Surface.h>
 #include <gui/SurfaceComposerClient.h>
-
 #include <private/gui/ComposerService.h>
-
 #include <ui/GraphicBuffer.h>
 #include <ui/Rect.h>
 
diff --git a/vulkan/libvulkan/Android.bp b/vulkan/libvulkan/Android.bp
index 018f200..f69de1f 100644
--- a/vulkan/libvulkan/Android.bp
+++ b/vulkan/libvulkan/Android.bp
@@ -79,6 +79,7 @@
         "hwvulkan_headers",
         "libnativeloader-headers",
         "vulkan_headers",
+        "libsurfaceflinger_headers",
     ],
     export_header_lib_headers: ["vulkan_headers"],
     shared_libs: [
@@ -100,6 +101,7 @@
         "libnativeloader_lazy",
         "libnativewindow",
         "android.hardware.graphics.common@1.0",
+        "libSurfaceFlingerProp",
     ],
     static_libs: ["libgrallocusage"],
 }
diff --git a/vulkan/libvulkan/driver.cpp b/vulkan/libvulkan/driver.cpp
index a7ec4ae..a5f0c9f 100644
--- a/vulkan/libvulkan/driver.cpp
+++ b/vulkan/libvulkan/driver.cpp
@@ -23,9 +23,10 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <SurfaceFlingerProperties.h>
+#include <android-base/properties.h>
 #include <android/dlext.h>
 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
-#include <android-base/properties.h>
 #include <configstore/Utils.h>
 #include <cutils/properties.h>
 #include <graphicsenv/GraphicsEnv.h>
@@ -959,9 +960,7 @@
         VK_KHR_INCREMENTAL_PRESENT_EXTENSION_NAME,
         VK_KHR_INCREMENTAL_PRESENT_SPEC_VERSION});
 
-    bool hdrBoardConfig =
-        getBool<ISurfaceFlingerConfigs, &ISurfaceFlingerConfigs::hasHDRDisplay>(
-            false);
+    bool hdrBoardConfig = android::sysprop::has_HDR_display(false);
     if (hdrBoardConfig) {
         loader_extensions.push_back({VK_EXT_HDR_METADATA_EXTENSION_NAME,
                                      VK_EXT_HDR_METADATA_SPEC_VERSION});