diff --git a/cmds/servicemanager/ServiceManager.cpp b/cmds/servicemanager/ServiceManager.cpp
index f6e4ec3..4081514 100644
--- a/cmds/servicemanager/ServiceManager.cpp
+++ b/cmds/servicemanager/ServiceManager.cpp
@@ -291,6 +291,8 @@
         service = &(it->second);
 
         if (!service->allowIsolated && is_multiuser_uid_isolated(ctx.uid)) {
+            LOG(WARNING) << "Isolated app with UID " << ctx.uid << " requested '" << name
+                         << "', but the service is not allowed for isolated apps.";
             return nullptr;
         }
         out = service->binder;
diff --git a/data/etc/Android.bp b/data/etc/Android.bp
index 226cae1..2143d93 100644
--- a/data/etc/Android.bp
+++ b/data/etc/Android.bp
@@ -263,6 +263,12 @@
 }
 
 prebuilt_etc {
+    name: "android.hardware.threadnetwork.prebuilt.xml",
+    src: "android.hardware.threadnetwork.xml",
+    defaults: ["frameworks_native_data_etc_defaults"],
+}
+
+prebuilt_etc {
     name: "android.hardware.usb.accessory.prebuilt.xml",
     src: "android.hardware.usb.accessory.xml",
     defaults: ["frameworks_native_data_etc_defaults"],
diff --git a/data/etc/android.hardware.telephony.satellite.xml b/data/etc/android.hardware.telephony.satellite.xml
index d36c958..5966cba 100644
--- a/data/etc/android.hardware.telephony.satellite.xml
+++ b/data/etc/android.hardware.telephony.satellite.xml
@@ -14,7 +14,7 @@
      limitations under the License.
 -->
 
-<!-- Feature for devices that support satellite communication via satellite vendor service APIs. -->
+<!-- Feature for devices that support Satellite communication via Satellite HAL APIs. -->
 <permissions>
     <feature name="android.hardware.telephony.satellite" />
 </permissions>
diff --git a/data/etc/android.hardware.threadnetwork.xml b/data/etc/android.hardware.threadnetwork.xml
new file mode 100644
index 0000000..9cbdc90
--- /dev/null
+++ b/data/etc/android.hardware.threadnetwork.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2023 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.
+-->
+<!-- Adds the feature indicating support for the ThreadNetwork API -->
+<permissions>
+    <feature name="android.hardware.threadnetwork" />
+</permissions>
diff --git a/include/input/Input.h b/include/input/Input.h
index 527a477..ea856c8 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -282,6 +282,7 @@
 
     // Indicates that the key represents a special gesture that has been detected by
     // the touch firmware or driver.  Causes touch events from the same device to be canceled.
+    // This policy flag prevents key events from changing touch mode state.
     POLICY_FLAG_GESTURE = 0x00000008,
 
     POLICY_FLAG_RAW_MASK = 0x0000ffff,
diff --git a/include/input/KeyLayoutMap.h b/include/input/KeyLayoutMap.h
index 8c3c74a..b126abe 100644
--- a/include/input/KeyLayoutMap.h
+++ b/include/input/KeyLayoutMap.h
@@ -17,13 +17,13 @@
 #pragma once
 
 #include <android-base/result.h>
+#include <input/InputDevice.h>
+
 #include <stdint.h>
 #include <utils/Errors.h>
 #include <utils/Tokenizer.h>
 #include <set>
 
-#include <input/InputDevice.h>
-
 namespace android {
 
 struct AxisInfo {
diff --git a/include/input/RingBuffer.h b/include/input/RingBuffer.h
index 37fe5af..d2747d6 100644
--- a/include/input/RingBuffer.h
+++ b/include/input/RingBuffer.h
@@ -24,7 +24,6 @@
 #include <type_traits>
 #include <utility>
 
-#include <android-base/logging.h>
 #include <android-base/stringprintf.h>
 
 namespace android {
@@ -277,15 +276,16 @@
 
     // Converts the index of an element in [0, size()] to its corresponding index in mBuffer.
     size_type bufferIndex(size_type elementIndex) const {
-        CHECK_LE(elementIndex, size());
+        if (elementIndex > size()) {
+            abort();
+        }
         size_type index = mBegin + elementIndex;
         if (index >= capacity()) {
             index -= capacity();
         }
-        CHECK_LT(index, capacity())
-                << android::base::StringPrintf("Invalid index calculated for element (%zu) "
-                                               "in buffer of size %zu",
-                                               elementIndex, size());
+        if (index >= capacity()) {
+            abort();
+        }
         return index;
     }
 
diff --git a/include/input/VelocityControl.h b/include/input/VelocityControl.h
index f3c201e..b78f63e 100644
--- a/include/input/VelocityControl.h
+++ b/include/input/VelocityControl.h
@@ -88,7 +88,7 @@
     VelocityControl();
 
     /* Gets the various parameters. */
-    VelocityControlParameters& getParameters();
+    const VelocityControlParameters& getParameters() const;
 
     /* Sets the various parameters. */
     void setParameters(const VelocityControlParameters& parameters);
diff --git a/include/input/VelocityTracker.h b/include/input/VelocityTracker.h
index da97c3e..b58feac 100644
--- a/include/input/VelocityTracker.h
+++ b/include/input/VelocityTracker.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <input/Input.h>
+#include <input/RingBuffer.h>
 #include <utils/BitSet.h>
 #include <utils/Timers.h>
 #include <map>
@@ -31,6 +32,8 @@
  */
 class VelocityTracker {
 public:
+    static const size_t MAX_DEGREE = 4;
+
     enum class Strategy : int32_t {
         DEFAULT = -1,
         MIN = 0,
@@ -47,23 +50,6 @@
         MAX = LEGACY,
     };
 
-    struct Estimator {
-        static const size_t MAX_DEGREE = 4;
-
-        // Estimator time base.
-        nsecs_t time = 0;
-
-        // Polynomial coefficients describing motion.
-        std::array<float, MAX_DEGREE + 1> coeff{};
-
-        // Polynomial degree (number of coefficients), or zero if no information is
-        // available.
-        uint32_t degree = 0;
-
-        // Confidence (coefficient of determination), between 0 (no fit) and 1 (perfect fit).
-        float confidence = 0;
-    };
-
     /*
      * Contains all available velocity data from a VelocityTracker.
      */
@@ -124,11 +110,6 @@
     // [-maxVelocity, maxVelocity], inclusive.
     ComputedVelocity getComputedVelocity(int32_t units, float maxVelocity);
 
-    // Gets an estimator for the recent movements of the specified pointer id for the given axis.
-    // Returns false and clears the estimator if there is no information available
-    // about the pointer.
-    std::optional<Estimator> getEstimator(int32_t axis, int32_t pointerId) const;
-
     // Gets the active pointer id, or -1 if none.
     inline int32_t getActivePointerId() const { return mActivePointerId.value_or(-1); }
 
@@ -169,14 +150,48 @@
 
     virtual void clearPointer(int32_t pointerId) = 0;
     virtual void addMovement(nsecs_t eventTime, int32_t pointerId, float position) = 0;
-    virtual std::optional<VelocityTracker::Estimator> getEstimator(int32_t pointerId) const = 0;
+    virtual std::optional<float> getVelocity(int32_t pointerId) const = 0;
 };
 
+/**
+ * A `VelocityTrackerStrategy` that accumulates added data points and processes the accumulated data
+ * points when getting velocity.
+ */
+class AccumulatingVelocityTrackerStrategy : public VelocityTrackerStrategy {
+public:
+    AccumulatingVelocityTrackerStrategy(nsecs_t horizonNanos, bool maintainHorizonDuringAdd);
+
+    void addMovement(nsecs_t eventTime, int32_t pointerId, float position) override;
+    void clearPointer(int32_t pointerId) override;
+
+protected:
+    struct Movement {
+        nsecs_t eventTime;
+        float position;
+    };
+
+    // Number of samples to keep.
+    // If different strategies would like to maintain different history size, we can make this a
+    // protected const field.
+    static constexpr uint32_t HISTORY_SIZE = 20;
+
+    /**
+     * Duration, in nanoseconds, since the latest movement where a movement may be considered for
+     * velocity calculation.
+     */
+    const nsecs_t mHorizonNanos;
+    /**
+     * If true, data points outside of horizon (see `mHorizonNanos`) will be cleared after each
+     * addition of a new movement.
+     */
+    const bool mMaintainHorizonDuringAdd;
+    std::map<int32_t /*pointerId*/, RingBuffer<Movement>> mMovements;
+};
 
 /*
  * Velocity tracker algorithm based on least-squares linear regression.
  */
-class LeastSquaresVelocityTrackerStrategy : public VelocityTrackerStrategy {
+class LeastSquaresVelocityTrackerStrategy : public AccumulatingVelocityTrackerStrategy {
 public:
     enum class Weighting {
         // No weights applied.  All data points are equally reliable.
@@ -193,13 +208,11 @@
         RECENT,
     };
 
-    // Degree must be no greater than Estimator::MAX_DEGREE.
+    // Degree must be no greater than VelocityTracker::MAX_DEGREE.
     LeastSquaresVelocityTrackerStrategy(uint32_t degree, Weighting weighting = Weighting::NONE);
     ~LeastSquaresVelocityTrackerStrategy() override;
 
-    void clearPointer(int32_t pointerId) override;
-    void addMovement(nsecs_t eventTime, int32_t pointerId, float position) override;
-    std::optional<VelocityTracker::Estimator> getEstimator(int32_t pointerId) const override;
+    std::optional<float> getVelocity(int32_t pointerId) const override;
 
 private:
     // Sample horizon.
@@ -207,23 +220,19 @@
     // changes in direction.
     static const nsecs_t HORIZON = 100 * 1000000; // 100 ms
 
-    // Number of samples to keep.
-    static const uint32_t HISTORY_SIZE = 20;
-
-    struct Movement {
-        nsecs_t eventTime;
-        float position;
-    };
-
     float chooseWeight(int32_t pointerId, uint32_t index) const;
+    /**
+     * An optimized least-squares solver for degree 2 and no weight (i.e. `Weighting.NONE`).
+     * The provided container of movements shall NOT be empty, and shall have the movements in
+     * chronological order.
+     */
+    std::optional<float> solveUnweightedLeastSquaresDeg2(
+            const RingBuffer<Movement>& movements) const;
 
     const uint32_t mDegree;
     const Weighting mWeighting;
-    std::map<int32_t /*pointerId*/, size_t /*positionInArray*/> mIndex;
-    std::map<int32_t /*pointerId*/, std::array<Movement, HISTORY_SIZE>> mMovements;
 };
 
-
 /*
  * Velocity tracker algorithm that uses an IIR filter.
  */
@@ -235,7 +244,7 @@
 
     void clearPointer(int32_t pointerId) override;
     void addMovement(nsecs_t eventTime, int32_t pointerId, float positions) override;
-    std::optional<VelocityTracker::Estimator> getEstimator(int32_t pointerId) const override;
+    std::optional<float> getVelocity(int32_t pointerId) const override;
 
 private:
     // Current state estimate for a particular pointer.
@@ -252,49 +261,33 @@
 
     void initState(State& state, nsecs_t eventTime, float pos) const;
     void updateState(State& state, nsecs_t eventTime, float pos) const;
-    void populateEstimator(const State& state, VelocityTracker::Estimator* outEstimator) const;
 };
 
 
 /*
  * Velocity tracker strategy used prior to ICS.
  */
-class LegacyVelocityTrackerStrategy : public VelocityTrackerStrategy {
+class LegacyVelocityTrackerStrategy : public AccumulatingVelocityTrackerStrategy {
 public:
     LegacyVelocityTrackerStrategy();
     ~LegacyVelocityTrackerStrategy() override;
 
-    void clearPointer(int32_t pointerId) override;
-    void addMovement(nsecs_t eventTime, int32_t pointerId, float position) override;
-    std::optional<VelocityTracker::Estimator> getEstimator(int32_t pointerId) const override;
+    std::optional<float> getVelocity(int32_t pointerId) const override;
 
 private:
     // Oldest sample to consider when calculating the velocity.
     static const nsecs_t HORIZON = 200 * 1000000; // 100 ms
 
-    // Number of samples to keep.
-    static const uint32_t HISTORY_SIZE = 20;
-
     // The minimum duration between samples when estimating velocity.
     static const nsecs_t MIN_DURATION = 10 * 1000000; // 10 ms
-
-    struct Movement {
-        nsecs_t eventTime;
-        float position;
-    };
-
-    std::map<int32_t /*pointerId*/, size_t /*positionInArray*/> mIndex;
-    std::map<int32_t /*pointerId*/, std::array<Movement, HISTORY_SIZE>> mMovements;
 };
 
-class ImpulseVelocityTrackerStrategy : public VelocityTrackerStrategy {
+class ImpulseVelocityTrackerStrategy : public AccumulatingVelocityTrackerStrategy {
 public:
     ImpulseVelocityTrackerStrategy(bool deltaValues);
     ~ImpulseVelocityTrackerStrategy() override;
 
-    void clearPointer(int32_t pointerId) override;
-    void addMovement(nsecs_t eventTime, int32_t pointerId, float position) override;
-    std::optional<VelocityTracker::Estimator> getEstimator(int32_t pointerId) const override;
+    std::optional<float> getVelocity(int32_t pointerId) const override;
 
 private:
     // Sample horizon.
@@ -302,21 +295,10 @@
     // changes in direction.
     static constexpr nsecs_t HORIZON = 100 * 1000000; // 100 ms
 
-    // Number of samples to keep.
-    static constexpr size_t HISTORY_SIZE = 20;
-
-    struct Movement {
-        nsecs_t eventTime;
-        float position;
-    };
-
     // Whether or not the input movement values for the strategy come in the form of delta values.
     // If the input values are not deltas, the strategy needs to calculate deltas as part of its
     // velocity calculation.
     const bool mDeltaValues;
-
-    std::map<int32_t /*pointerId*/, size_t /*positionInArray*/> mIndex;
-    std::map<int32_t /*pointerId*/, std::array<Movement, HISTORY_SIZE>> mMovements;
 };
 
 } // namespace android
diff --git a/include/powermanager/PowerHalController.h b/include/powermanager/PowerHalController.h
index 82e4551..9e426d3 100644
--- a/include/powermanager/PowerHalController.h
+++ b/include/powermanager/PowerHalController.h
@@ -17,11 +17,11 @@
 #ifndef ANDROID_POWERHALCONTROLLER_H
 #define ANDROID_POWERHALCONTROLLER_H
 
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPowerHintSession.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <android-base/thread_annotations.h>
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/IPowerHintSession.h>
-#include <android/hardware/power/Mode.h>
 #include <powermanager/PowerHalWrapper.h>
 
 namespace android {
@@ -55,11 +55,13 @@
 
     virtual void init();
 
-    virtual HalResult<void> setBoost(hardware::power::Boost boost, int32_t durationMs) override;
-    virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) override;
-    virtual HalResult<sp<hardware::power::IPowerHintSession>> createHintSession(
-            int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
-            int64_t durationNanos) override;
+    virtual HalResult<void> setBoost(aidl::android::hardware::power::Boost boost,
+                                     int32_t durationMs) override;
+    virtual HalResult<void> setMode(aidl::android::hardware::power::Mode mode,
+                                    bool enabled) override;
+    virtual HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>
+    createHintSession(int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
+                      int64_t durationNanos) override;
     virtual HalResult<int64_t> getHintSessionPreferredRate() override;
 
 private:
diff --git a/include/powermanager/PowerHalLoader.h b/include/powermanager/PowerHalLoader.h
index e0384f3..cbbfa59 100644
--- a/include/powermanager/PowerHalLoader.h
+++ b/include/powermanager/PowerHalLoader.h
@@ -17,11 +17,11 @@
 #ifndef ANDROID_POWERHALLOADER_H
 #define ANDROID_POWERHALLOADER_H
 
+#include <aidl/android/hardware/power/IPower.h>
 #include <android-base/thread_annotations.h>
 #include <android/hardware/power/1.1/IPower.h>
 #include <android/hardware/power/1.2/IPower.h>
 #include <android/hardware/power/1.3/IPower.h>
-#include <android/hardware/power/IPower.h>
 
 namespace android {
 
@@ -31,7 +31,7 @@
 class PowerHalLoader {
 public:
     static void unloadAll();
-    static sp<hardware::power::IPower> loadAidl();
+    static std::shared_ptr<aidl::android::hardware::power::IPower> loadAidl();
     static sp<hardware::power::V1_0::IPower> loadHidlV1_0();
     static sp<hardware::power::V1_1::IPower> loadHidlV1_1();
     static sp<hardware::power::V1_2::IPower> loadHidlV1_2();
@@ -39,7 +39,7 @@
 
 private:
     static std::mutex gHalMutex;
-    static sp<hardware::power::IPower> gHalAidl GUARDED_BY(gHalMutex);
+    static std::shared_ptr<aidl::android::hardware::power::IPower> gHalAidl GUARDED_BY(gHalMutex);
     static sp<hardware::power::V1_0::IPower> gHalHidlV1_0 GUARDED_BY(gHalMutex);
     static sp<hardware::power::V1_1::IPower> gHalHidlV1_1 GUARDED_BY(gHalMutex);
     static sp<hardware::power::V1_2::IPower> gHalHidlV1_2 GUARDED_BY(gHalMutex);
diff --git a/include/powermanager/PowerHalWrapper.h b/include/powermanager/PowerHalWrapper.h
index 8028aa8..4e4a1b0 100644
--- a/include/powermanager/PowerHalWrapper.h
+++ b/include/powermanager/PowerHalWrapper.h
@@ -17,14 +17,15 @@
 #ifndef ANDROID_POWERHALWRAPPER_H
 #define ANDROID_POWERHALWRAPPER_H
 
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPowerHintSession.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <android-base/thread_annotations.h>
 #include <android/hardware/power/1.1/IPower.h>
 #include <android/hardware/power/1.2/IPower.h>
 #include <android/hardware/power/1.3/IPower.h>
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/IPowerHintSession.h>
-#include <android/hardware/power/Mode.h>
+#include <binder/Status.h>
 
 namespace android {
 
@@ -47,7 +48,7 @@
     }
     static HalResult<T> unsupported() { return HalResult("", /* unsupported= */ true); }
 
-    static HalResult<T> fromStatus(binder::Status status, T data) {
+    static HalResult<T> fromStatus(const binder::Status& status, T data) {
         if (status.exceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
             return HalResult<T>::unsupported();
         }
@@ -56,14 +57,28 @@
         }
         return HalResult<T>::failed(std::string(status.toString8().c_str()));
     }
-    static HalResult<T> fromStatus(hardware::power::V1_0::Status status, T data);
+
+    static HalResult<T> fromStatus(const ndk::ScopedAStatus& status, T data) {
+        if (status.getExceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
+            return HalResult<T>::unsupported();
+        }
+        if (status.isOk()) {
+            return HalResult<T>::ok(data);
+        }
+        return HalResult<T>::failed(std::string(status.getDescription()));
+    }
 
     template <typename R>
-    static HalResult<T> fromReturn(hardware::Return<R>& ret, T data);
+    static HalResult<T> fromReturn(hardware::Return<R>& ret, T data) {
+        return ret.isOk() ? HalResult<T>::ok(data) : HalResult<T>::failed(ret.description());
+    }
 
     template <typename R>
     static HalResult<T> fromReturn(hardware::Return<R>& ret, hardware::power::V1_0::Status status,
-                                   T data);
+                                   T data) {
+        return ret.isOk() ? HalResult<T>::fromStatus(status, data)
+                          : HalResult<T>::failed(ret.description());
+    }
 
     // This will throw std::bad_optional_access if this result is not ok.
     const T& value() const { return mValue.value(); }
@@ -91,12 +106,30 @@
     static HalResult<void> failed(std::string msg) { return HalResult(std::move(msg)); }
     static HalResult<void> unsupported() { return HalResult(/* unsupported= */ true); }
 
-    static HalResult<void> fromStatus(status_t status);
-    static HalResult<void> fromStatus(binder::Status status);
-    static HalResult<void> fromStatus(hardware::power::V1_0::Status status);
+    static HalResult<void> fromStatus(const binder::Status& status) {
+        if (status.exceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
+            return HalResult<void>::unsupported();
+        }
+        if (status.isOk()) {
+            return HalResult<void>::ok();
+        }
+        return HalResult<void>::failed(std::string(status.toString8().c_str()));
+    }
+
+    static HalResult<void> fromStatus(const ndk::ScopedAStatus& status) {
+        if (status.getExceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
+            return HalResult<void>::unsupported();
+        }
+        if (status.isOk()) {
+            return HalResult<void>::ok();
+        }
+        return HalResult<void>::failed(std::string(status.getDescription()));
+    }
 
     template <typename R>
-    static HalResult<void> fromReturn(hardware::Return<R>& ret);
+    static HalResult<void> fromReturn(hardware::Return<R>& ret) {
+        return ret.isOk() ? HalResult<void>::ok() : HalResult<void>::failed(ret.description());
+    }
 
     bool isOk() const { return !mUnsupported && !mFailed; }
     bool isFailed() const { return !mUnsupported && mFailed; }
@@ -119,11 +152,12 @@
 public:
     virtual ~HalWrapper() = default;
 
-    virtual HalResult<void> setBoost(hardware::power::Boost boost, int32_t durationMs) = 0;
-    virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) = 0;
-    virtual HalResult<sp<hardware::power::IPowerHintSession>> createHintSession(
-            int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
-            int64_t durationNanos) = 0;
+    virtual HalResult<void> setBoost(aidl::android::hardware::power::Boost boost,
+                                     int32_t durationMs) = 0;
+    virtual HalResult<void> setMode(aidl::android::hardware::power::Mode mode, bool enabled) = 0;
+    virtual HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>
+    createHintSession(int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
+                      int64_t durationNanos) = 0;
     virtual HalResult<int64_t> getHintSessionPreferredRate() = 0;
 };
 
@@ -131,14 +165,15 @@
 class EmptyHalWrapper : public HalWrapper {
 public:
     EmptyHalWrapper() = default;
-    ~EmptyHalWrapper() = default;
+    ~EmptyHalWrapper() override = default;
 
-    virtual HalResult<void> setBoost(hardware::power::Boost boost, int32_t durationMs) override;
-    virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) override;
-    virtual HalResult<sp<hardware::power::IPowerHintSession>> createHintSession(
+    HalResult<void> setBoost(aidl::android::hardware::power::Boost boost,
+                             int32_t durationMs) override;
+    HalResult<void> setMode(aidl::android::hardware::power::Mode mode, bool enabled) override;
+    HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>> createHintSession(
             int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
             int64_t durationNanos) override;
-    virtual HalResult<int64_t> getHintSessionPreferredRate() override;
+    HalResult<int64_t> getHintSessionPreferredRate() override;
 };
 
 // Wrapper for the HIDL Power HAL v1.0.
@@ -146,14 +181,15 @@
 public:
     explicit HidlHalWrapperV1_0(sp<hardware::power::V1_0::IPower> handleV1_0)
           : mHandleV1_0(std::move(handleV1_0)) {}
-    virtual ~HidlHalWrapperV1_0() = default;
+    ~HidlHalWrapperV1_0() override = default;
 
-    virtual HalResult<void> setBoost(hardware::power::Boost boost, int32_t durationMs) override;
-    virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) override;
-    virtual HalResult<sp<hardware::power::IPowerHintSession>> createHintSession(
+    HalResult<void> setBoost(aidl::android::hardware::power::Boost boost,
+                             int32_t durationMs) override;
+    HalResult<void> setMode(aidl::android::hardware::power::Mode mode, bool enabled) override;
+    HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>> createHintSession(
             int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
             int64_t durationNanos) override;
-    virtual HalResult<int64_t> getHintSessionPreferredRate() override;
+    HalResult<int64_t> getHintSessionPreferredRate() override;
 
 protected:
     const sp<hardware::power::V1_0::IPower> mHandleV1_0;
@@ -167,67 +203,71 @@
 // Wrapper for the HIDL Power HAL v1.1.
 class HidlHalWrapperV1_1 : public HidlHalWrapperV1_0 {
 public:
-    HidlHalWrapperV1_1(sp<hardware::power::V1_1::IPower> handleV1_1)
+    explicit HidlHalWrapperV1_1(sp<hardware::power::V1_1::IPower> handleV1_1)
           : HidlHalWrapperV1_0(std::move(handleV1_1)) {}
-    virtual ~HidlHalWrapperV1_1() = default;
+    ~HidlHalWrapperV1_1() override = default;
 
 protected:
-    virtual HalResult<void> sendPowerHint(hardware::power::V1_3::PowerHint hintId,
-                                          uint32_t data) override;
+    HalResult<void> sendPowerHint(hardware::power::V1_3::PowerHint hintId, uint32_t data) override;
 };
 
 // Wrapper for the HIDL Power HAL v1.2.
 class HidlHalWrapperV1_2 : public HidlHalWrapperV1_1 {
 public:
-    virtual HalResult<void> setBoost(hardware::power::Boost boost, int32_t durationMs) override;
-    virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) override;
-    HidlHalWrapperV1_2(sp<hardware::power::V1_2::IPower> handleV1_2)
+    HalResult<void> setBoost(aidl::android::hardware::power::Boost boost,
+                             int32_t durationMs) override;
+    HalResult<void> setMode(aidl::android::hardware::power::Mode mode, bool enabled) override;
+    explicit HidlHalWrapperV1_2(sp<hardware::power::V1_2::IPower> handleV1_2)
           : HidlHalWrapperV1_1(std::move(handleV1_2)) {}
-    virtual ~HidlHalWrapperV1_2() = default;
+    ~HidlHalWrapperV1_2() override = default;
 
 protected:
-    virtual HalResult<void> sendPowerHint(hardware::power::V1_3::PowerHint hintId,
-                                          uint32_t data) override;
+    HalResult<void> sendPowerHint(hardware::power::V1_3::PowerHint hintId, uint32_t data) override;
 };
 
 // Wrapper for the HIDL Power HAL v1.3.
 class HidlHalWrapperV1_3 : public HidlHalWrapperV1_2 {
 public:
-    virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) override;
-    HidlHalWrapperV1_3(sp<hardware::power::V1_3::IPower> handleV1_3)
+    HalResult<void> setMode(aidl::android::hardware::power::Mode mode, bool enabled) override;
+    explicit HidlHalWrapperV1_3(sp<hardware::power::V1_3::IPower> handleV1_3)
           : HidlHalWrapperV1_2(std::move(handleV1_3)) {}
-    virtual ~HidlHalWrapperV1_3() = default;
+    ~HidlHalWrapperV1_3() override = default;
 
 protected:
-    virtual HalResult<void> sendPowerHint(hardware::power::V1_3::PowerHint hintId,
-                                          uint32_t data) override;
+    HalResult<void> sendPowerHint(hardware::power::V1_3::PowerHint hintId, uint32_t data) override;
 };
 
 // Wrapper for the AIDL Power HAL.
 class AidlHalWrapper : public HalWrapper {
 public:
-    explicit AidlHalWrapper(sp<hardware::power::IPower> handle) : mHandle(std::move(handle)) {}
-    virtual ~AidlHalWrapper() = default;
+    explicit AidlHalWrapper(std::shared_ptr<aidl::android::hardware::power::IPower> handle)
+          : mHandle(std::move(handle)) {}
+    ~AidlHalWrapper() override = default;
 
-    virtual HalResult<void> setBoost(hardware::power::Boost boost, int32_t durationMs) override;
-    virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) override;
-    virtual HalResult<sp<hardware::power::IPowerHintSession>> createHintSession(
+    HalResult<void> setBoost(aidl::android::hardware::power::Boost boost,
+                             int32_t durationMs) override;
+    HalResult<void> setMode(aidl::android::hardware::power::Mode mode, bool enabled) override;
+    HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>> createHintSession(
             int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
             int64_t durationNanos) override;
-    virtual HalResult<int64_t> getHintSessionPreferredRate() override;
+    HalResult<int64_t> getHintSessionPreferredRate() override;
 
 private:
     // Control access to the boost and mode supported arrays.
     std::mutex mBoostMutex;
     std::mutex mModeMutex;
-    sp<hardware::power::IPower> mHandle;
+    std::shared_ptr<aidl::android::hardware::power::IPower> mHandle;
     // Android framework only sends boost upto DISPLAY_UPDATE_IMMINENT.
     // Need to increase the array size if more boost supported.
-    std::array<std::atomic<HalSupport>,
-               static_cast<int32_t>(hardware::power::Boost::DISPLAY_UPDATE_IMMINENT) + 1>
+    std::array<
+            std::atomic<HalSupport>,
+            static_cast<int32_t>(aidl::android::hardware::power::Boost::DISPLAY_UPDATE_IMMINENT) +
+                    1>
             mBoostSupportedArray GUARDED_BY(mBoostMutex) = {HalSupport::UNKNOWN};
     std::array<std::atomic<HalSupport>,
-               static_cast<int32_t>(*(android::enum_range<hardware::power::Mode>().end() - 1)) + 1>
+               static_cast<int32_t>(
+                       *(ndk::enum_range<aidl::android::hardware::power::Mode>().end() - 1)) +
+                       1>
             mModeSupportedArray GUARDED_BY(mModeMutex) = {HalSupport::UNKNOWN};
 };
 
diff --git a/libs/binder/ActivityManager.cpp b/libs/binder/ActivityManager.cpp
index aca5009..5264276 100644
--- a/libs/binder/ActivityManager.cpp
+++ b/libs/binder/ActivityManager.cpp
@@ -21,6 +21,7 @@
 #include <binder/ActivityManager.h>
 #include <binder/Binder.h>
 #include <binder/IServiceManager.h>
+#include <binder/ProcessState.h>
 
 #include <utils/SystemClock.h>
 
@@ -33,27 +34,36 @@
 sp<IActivityManager> ActivityManager::getService()
 {
     std::lock_guard<Mutex> scoped_lock(mLock);
-    int64_t startTime = 0;
     sp<IActivityManager> service = mService;
-    while (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
-        sp<IBinder> binder = defaultServiceManager()->checkService(String16("activity"));
-        if (binder == nullptr) {
-            // Wait for the activity service to come back...
-            if (startTime == 0) {
-                startTime = uptimeMillis();
-                ALOGI("Waiting for activity service");
-            } else if ((uptimeMillis() - startTime) > 1000000) {
-                ALOGW("Waiting too long for activity service, giving up");
-                service = nullptr;
-                break;
-            }
-            usleep(25000);
-        } else {
+    if (ProcessState::self()->isThreadPoolStarted()) {
+        if (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
+            sp<IBinder> binder = defaultServiceManager()->waitForService(String16("activity"));
             service = interface_cast<IActivityManager>(binder);
             mService = service;
         }
+    } else {
+        ALOGI("Thread pool not started. Polling for activity service.");
+        int64_t startTime = 0;
+        while (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
+            sp<IBinder> binder = defaultServiceManager()->checkService(String16("activity"));
+            if (binder == nullptr) {
+                // Wait for the activity service to come back...
+                if (startTime == 0) {
+                    startTime = uptimeMillis();
+                    ALOGI("Waiting for activity service");
+                } else if ((uptimeMillis() - startTime) > 1000000) {
+                    ALOGW("Waiting too long for activity service, giving up");
+                    service = nullptr;
+                    break;
+                }
+                usleep(25000);
+            } else {
+                service = interface_cast<IActivityManager>(binder);
+                mService = service;
+            }
+        }
     }
-    return service;
+    return mService;
 }
 
 int ActivityManager::openContentUri(const String16& stringUri)
diff --git a/libs/gui/DisplayEventReceiver.cpp b/libs/gui/DisplayEventReceiver.cpp
index 6849a95..67cbc7b 100644
--- a/libs/gui/DisplayEventReceiver.cpp
+++ b/libs/gui/DisplayEventReceiver.cpp
@@ -99,7 +99,7 @@
     if (mEventConnection != nullptr) {
         auto status = mEventConnection->getLatestVsyncEventData(outVsyncEventData);
         if (!status.isOk()) {
-            ALOGE("Failed to get latest vsync event data: %s", status.exceptionMessage().c_str());
+            ALOGE("Failed to get latest vsync event data: %s", status.toString8().c_str());
             return status.transactionError();
         }
         return NO_ERROR;
diff --git a/libs/gui/fuzzer/Android.bp b/libs/gui/fuzzer/Android.bp
index 82e1b5a..75bae76 100644
--- a/libs/gui/fuzzer/Android.bp
+++ b/libs/gui/fuzzer/Android.bp
@@ -46,7 +46,7 @@
         "android.hardware.configstore-utils",
         "android.hardware.graphics.bufferqueue@1.0",
         "android.hardware.graphics.bufferqueue@2.0",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
         "android.hidl.token@1.0",
         "libSurfaceFlingerProp",
         "libgui",
@@ -72,6 +72,14 @@
             "android-media-fuzzing-reports@google.com",
         ],
         componentid: 155276,
+        hotlists: [
+            "4593311",
+        ],
+        description: "The fuzzer targets the APIs of libgui library",
+        vector: "local_no_privileges_required",
+        service_privilege: "privileged",
+        users: "multi_user",
+        fuzzed_code_usage: "shipped",
     },
 }
 
diff --git a/libs/gui/fuzzer/libgui_surfaceComposerClient_fuzzer.cpp b/libs/gui/fuzzer/libgui_surfaceComposerClient_fuzzer.cpp
index 95b7f39..3e37e48 100644
--- a/libs/gui/fuzzer/libgui_surfaceComposerClient_fuzzer.cpp
+++ b/libs/gui/fuzzer/libgui_surfaceComposerClient_fuzzer.cpp
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#include <android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/Boost.h>
 #include <fuzzbinder/libbinder_driver.h>
 #include <gui/Surface.h>
 #include <gui/SurfaceComposerClient.h>
@@ -39,10 +39,13 @@
                                          ui::ColorMode::BT2100_HLG,
                                          ui::ColorMode::DISPLAY_BT2020};
 
-constexpr hardware::power::Boost kBoost[] = {
-        hardware::power::Boost::INTERACTION,   hardware::power::Boost::DISPLAY_UPDATE_IMMINENT,
-        hardware::power::Boost::ML_ACC,        hardware::power::Boost::AUDIO_LAUNCH,
-        hardware::power::Boost::CAMERA_LAUNCH, hardware::power::Boost::CAMERA_SHOT,
+constexpr aidl::android::hardware::power::Boost kBoost[] = {
+        aidl::android::hardware::power::Boost::INTERACTION,
+        aidl::android::hardware::power::Boost::DISPLAY_UPDATE_IMMINENT,
+        aidl::android::hardware::power::Boost::ML_ACC,
+        aidl::android::hardware::power::Boost::AUDIO_LAUNCH,
+        aidl::android::hardware::power::Boost::CAMERA_LAUNCH,
+        aidl::android::hardware::power::Boost::CAMERA_SHOT,
 };
 
 constexpr gui::TouchOcclusionMode kMode[] = {
@@ -284,7 +287,7 @@
     SurfaceComposerClient::doUncacheBufferTransaction(mFdp.ConsumeIntegral<uint64_t>());
 
     SurfaceComposerClient::setDisplayBrightness(displayToken, getBrightness(&mFdp));
-    hardware::power::Boost boostId = mFdp.PickValueInArray(kBoost);
+    aidl::android::hardware::power::Boost boostId = mFdp.PickValueInArray(kBoost);
     SurfaceComposerClient::notifyPowerBoost((int32_t)boostId);
 
     String8 surfaceName((mFdp.ConsumeRandomLengthString(kRandomStringMaxBytes)).c_str());
diff --git a/libs/gui/include/gui/JankInfo.h b/libs/gui/include/gui/JankInfo.h
index 1dddeba..bf354e7 100644
--- a/libs/gui/include/gui/JankInfo.h
+++ b/libs/gui/include/gui/JankInfo.h
@@ -46,6 +46,8 @@
     // where the previous frame was presented in the current frame's expected vsync. This pushes the
     // current frame to the next vsync. The behavior is similar to BufferStuffing.
     SurfaceFlingerStuffing = 0x100,
+    // Frame was dropped, as a newer frame was ready and replaced this frame.
+    Dropped = 0x200,
 };
 
 } // namespace android
diff --git a/libs/input/Android.bp b/libs/input/Android.bp
index 80a8c8d..30e4afe 100644
--- a/libs/input/Android.bp
+++ b/libs/input/Android.bp
@@ -274,9 +274,6 @@
             ],
         },
         host: {
-            shared: {
-                enabled: false,
-            },
             include_dirs: [
                 "bionic/libc/kernel/android/uapi/",
                 "bionic/libc/kernel/uapi",
diff --git a/libs/input/MotionPredictor.cpp b/libs/input/MotionPredictor.cpp
index 3037573..a425b93 100644
--- a/libs/input/MotionPredictor.cpp
+++ b/libs/input/MotionPredictor.cpp
@@ -25,9 +25,9 @@
 #include <string>
 #include <vector>
 
+#include <android-base/logging.h>
 #include <android-base/strings.h>
 #include <android/input.h>
-#include <log/log.h>
 
 #include <attestation/HmacKeyManager.h>
 #include <ftl/enum.h>
diff --git a/libs/input/VelocityControl.cpp b/libs/input/VelocityControl.cpp
index 5720099..c835a08 100644
--- a/libs/input/VelocityControl.cpp
+++ b/libs/input/VelocityControl.cpp
@@ -37,7 +37,7 @@
     reset();
 }
 
-VelocityControlParameters& VelocityControl::getParameters() {
+const VelocityControlParameters& VelocityControl::getParameters() const{
     return mParameters;
 }
 
diff --git a/libs/input/VelocityTracker.cpp b/libs/input/VelocityTracker.cpp
index 8551e5f..87c7768 100644
--- a/libs/input/VelocityTracker.cpp
+++ b/libs/input/VelocityTracker.cpp
@@ -22,7 +22,6 @@
 #include <math.h>
 #include <optional>
 
-#include <android-base/stringprintf.h>
 #include <input/PrintTools.h>
 #include <input/VelocityTracker.h>
 #include <utils/BitSet.h>
@@ -56,6 +55,9 @@
 // Nanoseconds per milliseconds.
 static const nsecs_t NANOS_PER_MS = 1000000;
 
+// Seconds per nanosecond.
+static const float SECONDS_PER_NANO = 1E-9;
+
 // All axes supported for velocity tracking, mapped to their default strategies.
 // Although other strategies are available for testing and comparison purposes,
 // the default strategy is the one that applications will actually use.  Be very careful
@@ -268,12 +270,8 @@
               ", activePointerId=%s",
               eventTime, pointerId, toString(mActivePointerId).c_str());
 
-        std::optional<Estimator> estimator = getEstimator(axis, pointerId);
-        ALOGD("  %d: axis=%d, position=%0.3f, "
-              "estimator (degree=%d, coeff=%s, confidence=%f)",
-              pointerId, axis, position, int((*estimator).degree),
-              vectorToString((*estimator).coeff.data(), (*estimator).degree + 1).c_str(),
-              (*estimator).confidence);
+        ALOGD("  %d: axis=%d, position=%0.3f, velocity=%s", pointerId, axis, position,
+              toString(getVelocity(axis, pointerId)).c_str());
     }
 }
 
@@ -349,9 +347,9 @@
 }
 
 std::optional<float> VelocityTracker::getVelocity(int32_t axis, int32_t pointerId) const {
-    std::optional<Estimator> estimator = getEstimator(axis, pointerId);
-    if (estimator && (*estimator).degree >= 1) {
-        return (*estimator).coeff[1];
+    const auto& it = mConfiguredStrategies.find(axis);
+    if (it != mConfiguredStrategies.end()) {
+        return it->second->getVelocity(pointerId);
     }
     return {};
 }
@@ -374,56 +372,52 @@
     return computedVelocity;
 }
 
-std::optional<VelocityTracker::Estimator> VelocityTracker::getEstimator(int32_t axis,
-                                                                        int32_t pointerId) const {
-    const auto& it = mConfiguredStrategies.find(axis);
-    if (it == mConfiguredStrategies.end()) {
-        return std::nullopt;
+AccumulatingVelocityTrackerStrategy::AccumulatingVelocityTrackerStrategy(
+        nsecs_t horizonNanos, bool maintainHorizonDuringAdd)
+      : mHorizonNanos(horizonNanos), mMaintainHorizonDuringAdd(maintainHorizonDuringAdd) {}
+
+void AccumulatingVelocityTrackerStrategy::clearPointer(int32_t pointerId) {
+    mMovements.erase(pointerId);
+}
+
+void AccumulatingVelocityTrackerStrategy::addMovement(nsecs_t eventTime, int32_t pointerId,
+                                                      float position) {
+    auto [ringBufferIt, _] = mMovements.try_emplace(pointerId, HISTORY_SIZE);
+    RingBuffer<Movement>& movements = ringBufferIt->second;
+    const size_t size = movements.size();
+
+    if (size != 0 && movements[size - 1].eventTime == eventTime) {
+        // When ACTION_POINTER_DOWN happens, we will first receive ACTION_MOVE with the coordinates
+        // of the existing pointers, and then ACTION_POINTER_DOWN with the coordinates that include
+        // the new pointer. If the eventtimes for both events are identical, just update the data
+        // for this time (i.e. pop out the last element, and insert the updated movement).
+        // We only compare against the last value, as it is likely that addMovement is called
+        // in chronological order as events occur.
+        movements.popBack();
     }
-    return it->second->getEstimator(pointerId);
+
+    movements.pushBack({eventTime, position});
+
+    // Clear movements that do not fall within `mHorizonNanos` of the latest movement.
+    // Note that, if in the future we decide to use more movements (i.e. increase HISTORY_SIZE),
+    // we can consider making this step binary-search based, which will give us some improvement.
+    if (mMaintainHorizonDuringAdd) {
+        while (eventTime - movements[0].eventTime > mHorizonNanos) {
+            movements.popFront();
+        }
+    }
 }
 
 // --- LeastSquaresVelocityTrackerStrategy ---
 
 LeastSquaresVelocityTrackerStrategy::LeastSquaresVelocityTrackerStrategy(uint32_t degree,
                                                                          Weighting weighting)
-      : mDegree(degree), mWeighting(weighting) {}
+      : AccumulatingVelocityTrackerStrategy(HORIZON /*horizonNanos*/,
+                                            true /*maintainHorizonDuringAdd*/),
+        mDegree(degree),
+        mWeighting(weighting) {}
 
-LeastSquaresVelocityTrackerStrategy::~LeastSquaresVelocityTrackerStrategy() {
-}
-
-void LeastSquaresVelocityTrackerStrategy::clearPointer(int32_t pointerId) {
-    mIndex.erase(pointerId);
-    mMovements.erase(pointerId);
-}
-
-void LeastSquaresVelocityTrackerStrategy::addMovement(nsecs_t eventTime, int32_t pointerId,
-                                                      float position) {
-    // If data for this pointer already exists, we have a valid entry at the position of
-    // mIndex[pointerId] and mMovements[pointerId]. In that case, we need to advance the index
-    // to the next position in the circular buffer and write the new Movement there. Otherwise,
-    // if this is a first movement for this pointer, we initialize the maps mIndex and mMovements
-    // for this pointer and write to the first position.
-    auto [movementIt, inserted] = mMovements.insert({pointerId, {}});
-    auto [indexIt, _] = mIndex.insert({pointerId, 0});
-    size_t& index = indexIt->second;
-    if (!inserted && movementIt->second[index].eventTime != eventTime) {
-        // When ACTION_POINTER_DOWN happens, we will first receive ACTION_MOVE with the coordinates
-        // of the existing pointers, and then ACTION_POINTER_DOWN with the coordinates that include
-        // the new pointer. If the eventtimes for both events are identical, just update the data
-        // for this time.
-        // We only compare against the last value, as it is likely that addMovement is called
-        // in chronological order as events occur.
-        index++;
-    }
-    if (index == HISTORY_SIZE) {
-        index = 0;
-    }
-
-    Movement& movement = movementIt->second[index];
-    movement.eventTime = eventTime;
-    movement.position = position;
-}
+LeastSquaresVelocityTrackerStrategy::~LeastSquaresVelocityTrackerStrategy() {}
 
 /**
  * Solves a linear least squares problem to obtain a N degree polynomial that fits
@@ -474,10 +468,9 @@
  * http://en.wikipedia.org/wiki/Numerical_methods_for_linear_least_squares
  * http://en.wikipedia.org/wiki/Gram-Schmidt
  */
-static bool solveLeastSquares(const std::vector<float>& x, const std::vector<float>& y,
-                              const std::vector<float>& w, uint32_t n,
-                              std::array<float, VelocityTracker::Estimator::MAX_DEGREE + 1>& outB,
-                              float* outDet) {
+static std::optional<float> solveLeastSquares(const std::vector<float>& x,
+                                              const std::vector<float>& y,
+                                              const std::vector<float>& w, uint32_t n) {
     const size_t m = x.size();
 
     ALOGD_IF(DEBUG_STRATEGY, "solveLeastSquares: m=%d, n=%d, x=%s, y=%s, w=%s", int(m), int(n),
@@ -515,7 +508,7 @@
         if (norm < 0.000001f) {
             // vectors are linearly dependent or zero so no solution
             ALOGD_IF(DEBUG_STRATEGY, "  - no solution, norm=%f", norm);
-            return false;
+            return {};
         }
 
         float invNorm = 1.0f / norm;
@@ -549,6 +542,7 @@
     for (uint32_t h = 0; h < m; h++) {
         wy[h] = y[h] * w[h];
     }
+    std::array<float, VelocityTracker::MAX_DEGREE + 1> outB;
     for (uint32_t i = n; i != 0; ) {
         i--;
         outB[i] = vectorDot(&q[i][0], wy, m);
@@ -570,42 +564,46 @@
     }
     ymean /= m;
 
-    float sserr = 0;
-    float sstot = 0;
-    for (uint32_t h = 0; h < m; h++) {
-        float err = y[h] - outB[0];
-        float term = 1;
-        for (uint32_t i = 1; i < n; i++) {
-            term *= x[h];
-            err -= term * outB[i];
+    if (DEBUG_STRATEGY) {
+        float sserr = 0;
+        float sstot = 0;
+        for (uint32_t h = 0; h < m; h++) {
+            float err = y[h] - outB[0];
+            float term = 1;
+            for (uint32_t i = 1; i < n; i++) {
+                term *= x[h];
+                err -= term * outB[i];
+            }
+            sserr += w[h] * w[h] * err * err;
+            float var = y[h] - ymean;
+            sstot += w[h] * w[h] * var * var;
         }
-        sserr += w[h] * w[h] * err * err;
-        float var = y[h] - ymean;
-        sstot += w[h] * w[h] * var * var;
+        ALOGD("  - sserr=%f", sserr);
+        ALOGD("  - sstot=%f", sstot);
     }
-    *outDet = sstot > 0.000001f ? 1.0f - (sserr / sstot) : 1;
 
-    ALOGD_IF(DEBUG_STRATEGY, "  - sserr=%f", sserr);
-    ALOGD_IF(DEBUG_STRATEGY, "  - sstot=%f", sstot);
-    ALOGD_IF(DEBUG_STRATEGY, "  - det=%f", *outDet);
-
-    return true;
+    return outB[1];
 }
 
 /*
  * Optimized unweighted second-order least squares fit. About 2x speed improvement compared to
  * the default implementation
  */
-static std::optional<std::array<float, 3>> solveUnweightedLeastSquaresDeg2(
-        const std::vector<float>& x, const std::vector<float>& y) {
-    const size_t count = x.size();
-    LOG_ALWAYS_FATAL_IF(count != y.size(), "Mismatching array sizes");
-    // Solving y = a*x^2 + b*x + c
+std::optional<float> LeastSquaresVelocityTrackerStrategy::solveUnweightedLeastSquaresDeg2(
+        const RingBuffer<Movement>& movements) const {
+    // Solving y = a*x^2 + b*x + c, where
+    //      - "x" is age (i.e. duration since latest movement) of the movemnets
+    //      - "y" is positions of the movements.
     float sxi = 0, sxiyi = 0, syi = 0, sxi2 = 0, sxi3 = 0, sxi2yi = 0, sxi4 = 0;
 
+    const size_t count = movements.size();
+    const Movement& newestMovement = movements[count - 1];
     for (size_t i = 0; i < count; i++) {
-        float xi = x[i];
-        float yi = y[i];
+        const Movement& movement = movements[i];
+        nsecs_t age = newestMovement.eventTime - movement.eventTime;
+        float xi = -age * SECONDS_PER_NANO;
+        float yi = movement.position;
+
         float xi2 = xi*xi;
         float xi3 = xi2*xi;
         float xi4 = xi3*xi;
@@ -632,124 +630,68 @@
         ALOGW("division by 0 when computing velocity, Sxx=%f, Sx2x2=%f, Sxx2=%f", Sxx, Sx2x2, Sxx2);
         return std::nullopt;
     }
-    // Compute a
-    float numerator = Sx2y*Sxx - Sxy*Sxx2;
-    float a = numerator / denominator;
 
-    // Compute b
-    numerator = Sxy*Sx2x2 - Sx2y*Sxx2;
-    float b = numerator / denominator;
-
-    // Compute c
-    float c = syi/count - b * sxi/count - a * sxi2/count;
-
-    return std::make_optional(std::array<float, 3>({c, b, a}));
+    return (Sxy * Sx2x2 - Sx2y * Sxx2) / denominator;
 }
 
-std::optional<VelocityTracker::Estimator> LeastSquaresVelocityTrackerStrategy::getEstimator(
-        int32_t pointerId) const {
+std::optional<float> LeastSquaresVelocityTrackerStrategy::getVelocity(int32_t pointerId) const {
     const auto movementIt = mMovements.find(pointerId);
     if (movementIt == mMovements.end()) {
         return std::nullopt; // no data
     }
+
+    const RingBuffer<Movement>& movements = movementIt->second;
+    const size_t size = movements.size();
+    if (size == 0) {
+        return std::nullopt; // no data
+    }
+
+    uint32_t degree = mDegree;
+    if (degree > size - 1) {
+        degree = size - 1;
+    }
+
+    if (degree <= 0) {
+        return std::nullopt;
+    }
+
+    if (degree == 2 && mWeighting == Weighting::NONE) {
+        // Optimize unweighted, quadratic polynomial fit
+        return solveUnweightedLeastSquaresDeg2(movements);
+    }
+
     // Iterate over movement samples in reverse time order and collect samples.
     std::vector<float> positions;
     std::vector<float> w;
     std::vector<float> time;
 
-    uint32_t index = mIndex.at(pointerId);
-    const Movement& newestMovement = movementIt->second[index];
-    do {
-        const Movement& movement = movementIt->second[index];
-
+    const Movement& newestMovement = movements[size - 1];
+    for (ssize_t i = size - 1; i >= 0; i--) {
+        const Movement& movement = movements[i];
         nsecs_t age = newestMovement.eventTime - movement.eventTime;
-        if (age > HORIZON) {
-            break;
-        }
-        if (movement.eventTime == 0 && index != 0) {
-            // All eventTime's are initialized to 0. In this fixed-width circular buffer, it's
-            // possible that not all entries are valid. We use a time=0 as a signal for those
-            // uninitialized values. If we encounter a time of 0 in a position
-            // that's > 0, it means that we hit the block where the data wasn't initialized.
-            // We still don't know whether the value at index=0, with eventTime=0 is valid.
-            // However, that's only possible when the value is by itself. So there's no hard in
-            // processing it anyways, since the velocity for a single point is zero, and this
-            // situation will only be encountered in artificial circumstances (in tests).
-            // In practice, time will never be 0.
-            break;
-        }
         positions.push_back(movement.position);
-        w.push_back(chooseWeight(pointerId, index));
+        w.push_back(chooseWeight(pointerId, i));
         time.push_back(-age * 0.000000001f);
-        index = (index == 0 ? HISTORY_SIZE : index) - 1;
-    } while (positions.size() < HISTORY_SIZE);
-
-    const size_t m = positions.size();
-    if (m == 0) {
-        return std::nullopt; // no data
     }
 
-    // Calculate a least squares polynomial fit.
-    uint32_t degree = mDegree;
-    if (degree > m - 1) {
-        degree = m - 1;
-    }
-
-    if (degree == 2 && mWeighting == Weighting::NONE) {
-        // Optimize unweighted, quadratic polynomial fit
-        std::optional<std::array<float, 3>> coeff =
-                solveUnweightedLeastSquaresDeg2(time, positions);
-        if (coeff) {
-            VelocityTracker::Estimator estimator;
-            estimator.time = newestMovement.eventTime;
-            estimator.degree = 2;
-            estimator.confidence = 1;
-            for (size_t i = 0; i <= estimator.degree; i++) {
-                estimator.coeff[i] = (*coeff)[i];
-            }
-            return estimator;
-        }
-    } else if (degree >= 1) {
-        // General case for an Nth degree polynomial fit
-        float det;
-        uint32_t n = degree + 1;
-        VelocityTracker::Estimator estimator;
-        if (solveLeastSquares(time, positions, w, n, estimator.coeff, &det)) {
-            estimator.time = newestMovement.eventTime;
-            estimator.degree = degree;
-            estimator.confidence = det;
-
-            ALOGD_IF(DEBUG_STRATEGY, "estimate: degree=%d, coeff=%s, confidence=%f",
-                     int(estimator.degree), vectorToString(estimator.coeff.data(), n).c_str(),
-                     estimator.confidence);
-
-            return estimator;
-        }
-    }
-
-    // No velocity data available for this pointer, but we do have its current position.
-    VelocityTracker::Estimator estimator;
-    estimator.coeff[0] = positions[0];
-    estimator.time = newestMovement.eventTime;
-    estimator.degree = 0;
-    estimator.confidence = 1;
-    return estimator;
+    // General case for an Nth degree polynomial fit
+    return solveLeastSquares(time, positions, w, degree + 1);
 }
 
 float LeastSquaresVelocityTrackerStrategy::chooseWeight(int32_t pointerId, uint32_t index) const {
-    const std::array<Movement, HISTORY_SIZE>& movements = mMovements.at(pointerId);
+    const RingBuffer<Movement>& movements = mMovements.at(pointerId);
+    const size_t size = movements.size();
     switch (mWeighting) {
         case Weighting::DELTA: {
             // Weight points based on how much time elapsed between them and the next
             // point so that points that "cover" a shorter time span are weighed less.
             //   delta  0ms: 0.5
             //   delta 10ms: 1.0
-            if (index == mIndex.at(pointerId)) {
+            if (index == size - 1) {
                 return 1.0f;
             }
-            uint32_t nextIndex = (index + 1) % HISTORY_SIZE;
             float deltaMillis =
-                    (movements[nextIndex].eventTime - movements[index].eventTime) * 0.000001f;
+                    (movements[index + 1].eventTime - movements[index].eventTime) * 0.000001f;
             if (deltaMillis < 0) {
                 return 0.5f;
             }
@@ -766,8 +708,7 @@
             //   age 50ms: 1.0
             //   age 60ms: 0.5
             float ageMillis =
-                    (movements[mIndex.at(pointerId)].eventTime - movements[index].eventTime) *
-                    0.000001f;
+                    (movements[size - 1].eventTime - movements[index].eventTime) * 0.000001f;
             if (ageMillis < 0) {
                 return 0.5f;
             }
@@ -789,8 +730,7 @@
             //   age  50ms: 1.0
             //   age 100ms: 0.5
             float ageMillis =
-                    (movements[mIndex.at(pointerId)].eventTime - movements[index].eventTime) *
-                    0.000001f;
+                    (movements[size - 1].eventTime - movements[index].eventTime) * 0.000001f;
             if (ageMillis < 50) {
                 return 1.0f;
             }
@@ -830,13 +770,9 @@
     mPointerIdBits.markBit(pointerId);
 }
 
-std::optional<VelocityTracker::Estimator> IntegratingVelocityTrackerStrategy::getEstimator(
-        int32_t pointerId) const {
+std::optional<float> IntegratingVelocityTrackerStrategy::getVelocity(int32_t pointerId) const {
     if (mPointerIdBits.hasBit(pointerId)) {
-        const State& state = mPointerState[pointerId];
-        VelocityTracker::Estimator estimator;
-        populateEstimator(state, &estimator);
-        return estimator;
+        return mPointerState[pointerId].vel;
     }
 
     return std::nullopt;
@@ -886,77 +822,39 @@
     state.pos = pos;
 }
 
-void IntegratingVelocityTrackerStrategy::populateEstimator(const State& state,
-        VelocityTracker::Estimator* outEstimator) const {
-    outEstimator->time = state.updateTime;
-    outEstimator->confidence = 1.0f;
-    outEstimator->degree = state.degree;
-    outEstimator->coeff[0] = state.pos;
-    outEstimator->coeff[1] = state.vel;
-    outEstimator->coeff[2] = state.accel / 2;
-}
-
-
 // --- LegacyVelocityTrackerStrategy ---
 
-LegacyVelocityTrackerStrategy::LegacyVelocityTrackerStrategy() {}
+LegacyVelocityTrackerStrategy::LegacyVelocityTrackerStrategy()
+      : AccumulatingVelocityTrackerStrategy(HORIZON /*horizonNanos*/,
+                                            false /*maintainHorizonDuringAdd*/) {}
 
 LegacyVelocityTrackerStrategy::~LegacyVelocityTrackerStrategy() {
 }
 
-void LegacyVelocityTrackerStrategy::clearPointer(int32_t pointerId) {
-    mIndex.erase(pointerId);
-    mMovements.erase(pointerId);
-}
-
-void LegacyVelocityTrackerStrategy::addMovement(nsecs_t eventTime, int32_t pointerId,
-                                                float position) {
-    // If data for this pointer already exists, we have a valid entry at the position of
-    // mIndex[pointerId] and mMovements[pointerId]. In that case, we need to advance the index
-    // to the next position in the circular buffer and write the new Movement there. Otherwise,
-    // if this is a first movement for this pointer, we initialize the maps mIndex and mMovements
-    // for this pointer and write to the first position.
-    auto [movementIt, inserted] = mMovements.insert({pointerId, {}});
-    auto [indexIt, _] = mIndex.insert({pointerId, 0});
-    size_t& index = indexIt->second;
-    if (!inserted && movementIt->second[index].eventTime != eventTime) {
-        // When ACTION_POINTER_DOWN happens, we will first receive ACTION_MOVE with the coordinates
-        // of the existing pointers, and then ACTION_POINTER_DOWN with the coordinates that include
-        // the new pointer. If the eventtimes for both events are identical, just update the data
-        // for this time.
-        // We only compare against the last value, as it is likely that addMovement is called
-        // in chronological order as events occur.
-        index++;
-    }
-    if (index == HISTORY_SIZE) {
-        index = 0;
-    }
-
-    Movement& movement = movementIt->second[index];
-    movement.eventTime = eventTime;
-    movement.position = position;
-}
-
-std::optional<VelocityTracker::Estimator> LegacyVelocityTrackerStrategy::getEstimator(
-        int32_t pointerId) const {
+std::optional<float> LegacyVelocityTrackerStrategy::getVelocity(int32_t pointerId) const {
     const auto movementIt = mMovements.find(pointerId);
     if (movementIt == mMovements.end()) {
         return std::nullopt; // no data
     }
-    const Movement& newestMovement = movementIt->second[mIndex.at(pointerId)];
+
+    const RingBuffer<Movement>& movements = movementIt->second;
+    const size_t size = movements.size();
+    if (size == 0) {
+        return std::nullopt; // no data
+    }
+
+    const Movement& newestMovement = movements[size - 1];
 
     // Find the oldest sample that contains the pointer and that is not older than HORIZON.
     nsecs_t minTime = newestMovement.eventTime - HORIZON;
-    uint32_t oldestIndex = mIndex.at(pointerId);
-    uint32_t numTouches = 1;
-    do {
-        uint32_t nextOldestIndex = (oldestIndex == 0 ? HISTORY_SIZE : oldestIndex) - 1;
-        const Movement& nextOldestMovement = mMovements.at(pointerId)[nextOldestIndex];
+    uint32_t oldestIndex = size - 1;
+    for (ssize_t i = size - 1; i >= 0; i--) {
+        const Movement& nextOldestMovement = movements[i];
         if (nextOldestMovement.eventTime < minTime) {
             break;
         }
-        oldestIndex = nextOldestIndex;
-    } while (++numTouches < HISTORY_SIZE);
+        oldestIndex = i;
+    }
 
     // Calculate an exponentially weighted moving average of the velocity estimate
     // at different points in time measured relative to the oldest sample.
@@ -970,17 +868,13 @@
     // 16ms apart but some consecutive samples could be only 0.5sm apart because
     // the hardware or driver reports them irregularly or in bursts.
     float accumV = 0;
-    uint32_t index = oldestIndex;
     uint32_t samplesUsed = 0;
-    const Movement& oldestMovement = mMovements.at(pointerId)[oldestIndex];
+    const Movement& oldestMovement = movements[oldestIndex];
     float oldestPosition = oldestMovement.position;
     nsecs_t lastDuration = 0;
 
-    while (numTouches-- > 1) {
-        if (++index == HISTORY_SIZE) {
-            index = 0;
-        }
-        const Movement& movement = mMovements.at(pointerId)[index];
+    for (size_t i = oldestIndex; i < size; i++) {
+        const Movement& movement = movements[i];
         nsecs_t duration = movement.eventTime - oldestMovement.eventTime;
 
         // If the duration between samples is small, we may significantly overestimate
@@ -996,62 +890,22 @@
         }
     }
 
-    // Report velocity.
-    float newestPosition = newestMovement.position;
-    VelocityTracker::Estimator estimator;
-    estimator.time = newestMovement.eventTime;
-    estimator.confidence = 1;
-    estimator.coeff[0] = newestPosition;
     if (samplesUsed) {
-        estimator.coeff[1] = accumV;
-        estimator.degree = 1;
-    } else {
-        estimator.degree = 0;
+        return accumV;
     }
-    return estimator;
+    return std::nullopt;
 }
 
 // --- ImpulseVelocityTrackerStrategy ---
 
 ImpulseVelocityTrackerStrategy::ImpulseVelocityTrackerStrategy(bool deltaValues)
-      : mDeltaValues(deltaValues) {}
+      : AccumulatingVelocityTrackerStrategy(HORIZON /*horizonNanos*/,
+                                            true /*maintainHorizonDuringAdd*/),
+        mDeltaValues(deltaValues) {}
 
 ImpulseVelocityTrackerStrategy::~ImpulseVelocityTrackerStrategy() {
 }
 
-void ImpulseVelocityTrackerStrategy::clearPointer(int32_t pointerId) {
-    mIndex.erase(pointerId);
-    mMovements.erase(pointerId);
-}
-
-void ImpulseVelocityTrackerStrategy::addMovement(nsecs_t eventTime, int32_t pointerId,
-                                                 float position) {
-    // If data for this pointer already exists, we have a valid entry at the position of
-    // mIndex[pointerId] and mMovements[pointerId]. In that case, we need to advance the index
-    // to the next position in the circular buffer and write the new Movement there. Otherwise,
-    // if this is a first movement for this pointer, we initialize the maps mIndex and mMovements
-    // for this pointer and write to the first position.
-    auto [movementIt, inserted] = mMovements.insert({pointerId, {}});
-    auto [indexIt, _] = mIndex.insert({pointerId, 0});
-    size_t& index = indexIt->second;
-    if (!inserted && movementIt->second[index].eventTime != eventTime) {
-        // When ACTION_POINTER_DOWN happens, we will first receive ACTION_MOVE with the coordinates
-        // of the existing pointers, and then ACTION_POINTER_DOWN with the coordinates that include
-        // the new pointer. If the eventtimes for both events are identical, just update the data
-        // for this time.
-        // We only compare against the last value, as it is likely that addMovement is called
-        // in chronological order as events occur.
-        index++;
-    }
-    if (index == HISTORY_SIZE) {
-        index = 0;
-    }
-
-    Movement& movement = movementIt->second[index];
-    movement.eventTime = eventTime;
-    movement.position = position;
-}
-
 /**
  * Calculate the total impulse provided to the screen and the resulting velocity.
  *
@@ -1126,112 +980,44 @@
     return (work < 0 ? -1.0 : 1.0) * sqrtf(fabsf(work)) * sqrt2;
 }
 
-static float calculateImpulseVelocity(const nsecs_t* t, const float* x, size_t count,
-                                      bool deltaValues) {
-    // The input should be in reversed time order (most recent sample at index i=0)
-    // t[i] is in nanoseconds, but due to FP arithmetic, convert to seconds inside this function
-    static constexpr float SECONDS_PER_NANO = 1E-9;
-
-    if (count < 2) {
-        return 0; // if 0 or 1 points, velocity is zero
-    }
-    if (t[1] > t[0]) { // Algorithm will still work, but not perfectly
-        ALOGE("Samples provided to calculateImpulseVelocity in the wrong order");
-    }
-
-    // If the data values are delta values, we do not have to calculate deltas here.
-    // We can use the delta values directly, along with the calculated time deltas.
-    // Since the data value input is in reversed time order:
-    //      [a] for non-delta inputs, instantenous velocity = (x[i] - x[i-1])/(t[i] - t[i-1])
-    //      [b] for delta inputs, instantenous velocity = -x[i-1]/(t[i] - t[i - 1])
-    // e.g., let the non-delta values are: V = [2, 3, 7], the equivalent deltas are D = [2, 1, 4].
-    // Since the input is in reversed time order, the input values for this function would be
-    // V'=[7, 3, 2] and D'=[4, 1, 2] for the non-delta and delta values, respectively.
-    //
-    // The equivalent of {(V'[2] - V'[1]) = 2 - 3 = -1} would be {-D'[1] = -1}
-    // Similarly, the equivalent of {(V'[1] - V'[0]) = 3 - 7 = -4} would be {-D'[0] = -4}
-
-    if (count == 2) { // if 2 points, basic linear calculation
-        if (t[1] == t[0]) {
-            ALOGE("Events have identical time stamps t=%" PRId64 ", setting velocity = 0", t[0]);
-            return 0;
-        }
-        const float deltaX = deltaValues ? -x[0] : x[1] - x[0];
-        return deltaX / (SECONDS_PER_NANO * (t[1] - t[0]));
-    }
-    // Guaranteed to have at least 3 points here
-    float work = 0;
-    for (size_t i = count - 1; i > 0 ; i--) { // start with the oldest sample and go forward in time
-        if (t[i] == t[i-1]) {
-            ALOGE("Events have identical time stamps t=%" PRId64 ", skipping sample", t[i]);
-            continue;
-        }
-        float vprev = kineticEnergyToVelocity(work); // v[i-1]
-        const float deltaX = deltaValues ? -x[i-1] : x[i] - x[i-1];
-        float vcurr = deltaX / (SECONDS_PER_NANO * (t[i] - t[i-1])); // v[i]
-        work += (vcurr - vprev) * fabsf(vcurr);
-        if (i == count - 1) {
-            work *= 0.5; // initial condition, case 2) above
-        }
-    }
-    return kineticEnergyToVelocity(work);
-}
-
-std::optional<VelocityTracker::Estimator> ImpulseVelocityTrackerStrategy::getEstimator(
-        int32_t pointerId) const {
+std::optional<float> ImpulseVelocityTrackerStrategy::getVelocity(int32_t pointerId) const {
     const auto movementIt = mMovements.find(pointerId);
     if (movementIt == mMovements.end()) {
         return std::nullopt; // no data
     }
 
-    // Iterate over movement samples in reverse time order and collect samples.
-    float positions[HISTORY_SIZE];
-    nsecs_t time[HISTORY_SIZE];
-    size_t m = 0; // number of points that will be used for fitting
-    size_t index = mIndex.at(pointerId);
-    const Movement& newestMovement = movementIt->second[index];
-    do {
-        const Movement& movement = movementIt->second[index];
-
-        nsecs_t age = newestMovement.eventTime - movement.eventTime;
-        if (age > HORIZON) {
-            break;
-        }
-        if (movement.eventTime == 0 && index != 0) {
-            // All eventTime's are initialized to 0. If we encounter a time of 0 in a position
-            // that's >0, it means that we hit the block where the data wasn't initialized.
-            // It's also possible that the sample at 0 would be invalid, but there's no harm in
-            // processing it, since it would be just a single point, and will only be encountered
-            // in artificial circumstances (in tests).
-            break;
-        }
-
-        positions[m] = movement.position;
-        time[m] = movement.eventTime;
-        index = (index == 0 ? HISTORY_SIZE : index) - 1;
-    } while (++m < HISTORY_SIZE);
-
-    if (m == 0) {
+    const RingBuffer<Movement>& movements = movementIt->second;
+    const size_t size = movements.size();
+    if (size == 0) {
         return std::nullopt; // no data
     }
-    VelocityTracker::Estimator estimator;
-    estimator.coeff[0] = 0;
-    estimator.coeff[1] = calculateImpulseVelocity(time, positions, m, mDeltaValues);
-    estimator.coeff[2] = 0;
 
-    estimator.time = newestMovement.eventTime;
-    estimator.degree = 2; // similar results to 2nd degree fit
-    estimator.confidence = 1;
+    float work = 0;
+    for (size_t i = 0; i < size - 1; i++) {
+        const Movement& mvt = movements[i];
+        const Movement& nextMvt = movements[i + 1];
 
-    ALOGD_IF(DEBUG_STRATEGY, "velocity: %.1f", estimator.coeff[1]);
+        float vprev = kineticEnergyToVelocity(work);
+        float delta = mDeltaValues ? nextMvt.position : nextMvt.position - mvt.position;
+        float vcurr = delta / (SECONDS_PER_NANO * (nextMvt.eventTime - mvt.eventTime));
+        work += (vcurr - vprev) * fabsf(vcurr);
+
+        if (i == 0) {
+            work *= 0.5; // initial condition, case 2) above
+        }
+    }
+
+    const float velocity = kineticEnergyToVelocity(work);
+    ALOGD_IF(DEBUG_STRATEGY, "velocity: %.1f", velocity);
 
     if (DEBUG_IMPULSE) {
         // TODO(b/134179997): delete this block once the switch to 'impulse' is complete.
         // Calculate the lsq2 velocity for the same inputs to allow runtime comparisons.
         // X axis chosen arbitrarily for velocity comparisons.
         VelocityTracker lsq2(VelocityTracker::Strategy::LSQ2);
-        for (ssize_t i = m - 1; i >= 0; i--) {
-            lsq2.addMovement(time[i], pointerId, AMOTION_EVENT_AXIS_X, positions[i]);
+        for (size_t i = 0; i < size; i++) {
+            const Movement& mvt = movements[i];
+            lsq2.addMovement(mvt.eventTime, pointerId, AMOTION_EVENT_AXIS_X, mvt.position);
         }
         std::optional<float> v = lsq2.getVelocity(AMOTION_EVENT_AXIS_X, pointerId);
         if (v) {
@@ -1240,7 +1026,7 @@
             ALOGD("lsq2 velocity: could not compute velocity");
         }
     }
-    return estimator;
+    return velocity;
 }
 
 } // namespace android
diff --git a/libs/input/tests/VelocityTracker_test.cpp b/libs/input/tests/VelocityTracker_test.cpp
index ae72109..ffebff1 100644
--- a/libs/input/tests/VelocityTracker_test.cpp
+++ b/libs/input/tests/VelocityTracker_test.cpp
@@ -42,8 +42,8 @@
 // here EV = expected value, tol = VELOCITY_TOLERANCE
 constexpr float VELOCITY_TOLERANCE = 0.2;
 
-// estimate coefficients must be within 0.001% of the target value
-constexpr float COEFFICIENT_TOLERANCE = 0.00001;
+// quadratic velocity must be within 0.001% of the target value
+constexpr float QUADRATIC_VELOCITY_TOLERANCE = 0.00001;
 
 // --- VelocityTrackerTest ---
 class VelocityTrackerTest : public testing::Test { };
@@ -76,10 +76,6 @@
     }
 }
 
-static void checkCoefficient(float actual, float target) {
-    EXPECT_NEAR_BY_FRACTION(actual, target, COEFFICIENT_TOLERANCE);
-}
-
 struct Position {
     float x;
     float y;
@@ -284,21 +280,20 @@
     checkVelocity(computeVelocity(strategy, motions, AMOTION_EVENT_AXIS_SCROLL), targetVelocity);
 }
 
-static void computeAndCheckQuadraticEstimate(const std::vector<PlanarMotionEventEntry>& motions,
-                                             const std::array<float, 3>& coefficients) {
+static void computeAndCheckQuadraticVelocity(const std::vector<PlanarMotionEventEntry>& motions,
+                                             float velocity) {
     VelocityTracker vt(VelocityTracker::Strategy::LSQ2);
     std::vector<MotionEvent> events = createTouchMotionEventStream(motions);
     for (MotionEvent event : events) {
         vt.addMovement(&event);
     }
-    std::optional<VelocityTracker::Estimator> estimatorX = vt.getEstimator(AMOTION_EVENT_AXIS_X, 0);
-    std::optional<VelocityTracker::Estimator> estimatorY = vt.getEstimator(AMOTION_EVENT_AXIS_Y, 0);
-    EXPECT_TRUE(estimatorX);
-    EXPECT_TRUE(estimatorY);
-    for (size_t i = 0; i< coefficients.size(); i++) {
-        checkCoefficient((*estimatorX).coeff[i], coefficients[i]);
-        checkCoefficient((*estimatorY).coeff[i], coefficients[i]);
-    }
+    std::optional<float> velocityX = vt.getVelocity(AMOTION_EVENT_AXIS_X, 0);
+    std::optional<float> velocityY = vt.getVelocity(AMOTION_EVENT_AXIS_Y, 0);
+    ASSERT_TRUE(velocityX);
+    ASSERT_TRUE(velocityY);
+
+    EXPECT_NEAR_BY_FRACTION(*velocityX, velocity, QUADRATIC_VELOCITY_TOLERANCE);
+    EXPECT_NEAR_BY_FRACTION(*velocityY, velocity, QUADRATIC_VELOCITY_TOLERANCE);
 }
 
 /*
@@ -461,8 +456,6 @@
 
     EXPECT_FALSE(vt.getVelocity(AMOTION_EVENT_AXIS_X, DEFAULT_POINTER_ID));
 
-    EXPECT_FALSE(vt.getEstimator(AMOTION_EVENT_AXIS_X, DEFAULT_POINTER_ID));
-
     VelocityTracker::ComputedVelocity computedVelocity = vt.getComputedVelocity(1000, 1000);
     for (uint32_t id = 0; id <= MAX_POINTER_ID; id++) {
         EXPECT_FALSE(computedVelocity.getVelocity(AMOTION_EVENT_AXIS_X, id));
@@ -1074,7 +1067,7 @@
  * If the events with POINTER_UP or POINTER_DOWN are not handled correctly (these should not be
  * part of the fitted data), this can cause large velocity values to be reported instead.
  */
-TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategyEstimator_ThreeFingerTap) {
+TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategy_ThreeFingerTap) {
     std::vector<PlanarMotionEventEntry> motions = {
         { 0us,      {{1063, 1128}, {NAN, NAN}, {NAN, NAN}} },
         { 10800us,  {{1063, 1128}, {682, 1318}, {NAN, NAN}} }, // POINTER_DOWN
@@ -1162,7 +1155,7 @@
  * ================== Tests for least squares fitting ==============================================
  *
  * Special care must be taken when constructing tests for LeastSquaresVelocityTrackerStrategy
- * getEstimator function. In particular:
+ * getVelocity function. In particular:
  * - inside the function, time gets converted from nanoseconds to seconds
  *   before being used in the fit.
  * - any values that are older than 100 ms are being discarded.
@@ -1183,7 +1176,7 @@
  * The coefficients are (0, 0, 1).
  * In the test, we would convert these coefficients to (0*(1E3)^0, 0*(1E3)^1, 1*(1E3)^2).
  */
-TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategyEstimator_Constant) {
+TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategy_Constant) {
     std::vector<PlanarMotionEventEntry> motions = {
         { 0ms, {{1, 1}} }, // 0 s
         { 1ms, {{1, 1}} }, // 0.001 s
@@ -1195,13 +1188,13 @@
     // -0.002, 1
     // -0.001, 1
     // -0.ms, 1
-    computeAndCheckQuadraticEstimate(motions, std::array<float, 3>({1, 0, 0}));
+    computeAndCheckQuadraticVelocity(motions, 0);
 }
 
 /*
  * Straight line y = x :: the constant and quadratic coefficients are zero.
  */
-TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategyEstimator_Linear) {
+TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategy_Linear) {
     std::vector<PlanarMotionEventEntry> motions = {
         { 0ms, {{-2, -2}} },
         { 1ms, {{-1, -1}} },
@@ -1213,13 +1206,13 @@
     // -0.002, -2
     // -0.001, -1
     // -0.000,  0
-    computeAndCheckQuadraticEstimate(motions, std::array<float, 3>({0, 1E3, 0}));
+    computeAndCheckQuadraticVelocity(motions, 1E3);
 }
 
 /*
  * Parabola
  */
-TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategyEstimator_Parabolic) {
+TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategy_Parabolic) {
     std::vector<PlanarMotionEventEntry> motions = {
         { 0ms, {{1, 1}} },
         { 1ms, {{4, 4}} },
@@ -1231,13 +1224,13 @@
     // -0.002, 1
     // -0.001, 4
     // -0.000, 8
-    computeAndCheckQuadraticEstimate(motions, std::array<float, 3>({8, 4.5E3, 0.5E6}));
+    computeAndCheckQuadraticVelocity(motions, 4.5E3);
 }
 
 /*
  * Parabola
  */
-TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategyEstimator_Parabolic2) {
+TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategy_Parabolic2) {
     std::vector<PlanarMotionEventEntry> motions = {
         { 0ms, {{1, 1}} },
         { 1ms, {{4, 4}} },
@@ -1249,13 +1242,13 @@
     // -0.002, 1
     // -0.001, 4
     // -0.000, 9
-    computeAndCheckQuadraticEstimate(motions, std::array<float, 3>({9, 6E3, 1E6}));
+    computeAndCheckQuadraticVelocity(motions, 6E3);
 }
 
 /*
  * Parabola :: y = x^2 :: the constant and linear coefficients are zero.
  */
-TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategyEstimator_Parabolic3) {
+TEST_F(VelocityTrackerTest, LeastSquaresVelocityTrackerStrategy_Parabolic3) {
     std::vector<PlanarMotionEventEntry> motions = {
         { 0ms, {{4, 4}} },
         { 1ms, {{1, 1}} },
@@ -1267,7 +1260,7 @@
     // -0.002, 4
     // -0.001, 1
     // -0.000, 0
-    computeAndCheckQuadraticEstimate(motions, std::array<float, 3>({0, 0E3, 1E6}));
+    computeAndCheckQuadraticVelocity(motions, 0E3);
 }
 
 // Recorded by hand on sailfish, but only the diffs are taken to test cumulative axis velocity.
diff --git a/libs/renderengine/skia/AutoBackendTexture.cpp b/libs/renderengine/skia/AutoBackendTexture.cpp
index 23c99b0..dad3c19 100644
--- a/libs/renderengine/skia/AutoBackendTexture.cpp
+++ b/libs/renderengine/skia/AutoBackendTexture.cpp
@@ -20,6 +20,11 @@
 #define LOG_TAG "RenderEngine"
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
+#include <SkImage.h>
+#include <include/gpu/ganesh/SkImageGanesh.h>
+#include <include/gpu/ganesh/SkSurfaceGanesh.h>
+
+#include <android/hardware_buffer.h>
 #include "ColorSpaces.h"
 #include "log/log_main.h"
 #include "utils/Trace.h"
@@ -79,7 +84,7 @@
 
 // releaseImageProc is invoked by SkImage, when the texture is no longer in use.
 // "releaseContext" contains an "AutoBackendTexture*".
-void AutoBackendTexture::releaseImageProc(SkImage::ReleaseContext releaseContext) {
+void AutoBackendTexture::releaseImageProc(SkImages::ReleaseContext releaseContext) {
     AutoBackendTexture* textureRelease = reinterpret_cast<AutoBackendTexture*>(releaseContext);
     textureRelease->unref(false);
 }
@@ -136,8 +141,9 @@
     }
 
     sk_sp<SkImage> image =
-            SkImage::MakeFromTexture(context, mBackendTexture, kTopLeft_GrSurfaceOrigin, colorType,
-                                     alphaType, toSkColorSpace(dataspace), releaseImageProc, this);
+            SkImages::BorrowTextureFrom(context, mBackendTexture, kTopLeft_GrSurfaceOrigin,
+                                        colorType, alphaType, toSkColorSpace(dataspace),
+                                        releaseImageProc, this);
     if (image.get()) {
         // The following ref will be counteracted by releaseProc, when SkImage is discarded.
         ref();
@@ -157,10 +163,10 @@
     LOG_ALWAYS_FATAL_IF(!mIsOutputBuffer, "You can't generate a SkSurface for a read-only texture");
     if (!mSurface.get() || mDataspace != dataspace) {
         sk_sp<SkSurface> surface =
-                SkSurface::MakeFromBackendTexture(context, mBackendTexture,
-                                                  kTopLeft_GrSurfaceOrigin, 0, mColorType,
-                                                  toSkColorSpace(dataspace), nullptr,
-                                                  releaseSurfaceProc, this);
+                SkSurfaces::WrapBackendTexture(context, mBackendTexture,
+                                               kTopLeft_GrSurfaceOrigin, 0, mColorType,
+                                               toSkColorSpace(dataspace), nullptr,
+                                               releaseSurfaceProc, this);
         if (surface.get()) {
             // The following ref will be counteracted by releaseProc, when SkSurface is discarded.
             ref();
diff --git a/libs/renderengine/skia/AutoBackendTexture.h b/libs/renderengine/skia/AutoBackendTexture.h
index 00b901b..509ac40 100644
--- a/libs/renderengine/skia/AutoBackendTexture.h
+++ b/libs/renderengine/skia/AutoBackendTexture.h
@@ -144,7 +144,7 @@
     CleanupManager& mCleanupMgr;
 
     static void releaseSurfaceProc(SkSurface::ReleaseContext releaseContext);
-    static void releaseImageProc(SkImage::ReleaseContext releaseContext);
+    static void releaseImageProc(SkImages::ReleaseContext releaseContext);
 
     int mUsageCount = 0;
 
diff --git a/libs/renderengine/skia/SkiaRenderEngine.cpp b/libs/renderengine/skia/SkiaRenderEngine.cpp
index 18d9864..871d258 100644
--- a/libs/renderengine/skia/SkiaRenderEngine.cpp
+++ b/libs/renderengine/skia/SkiaRenderEngine.cpp
@@ -20,6 +20,7 @@
 
 #include "SkiaRenderEngine.h"
 
+#include <include/gpu/ganesh/SkSurfaceGanesh.h>
 #include <GrBackendSemaphore.h>
 #include <GrContextOptions.h>
 #include <SkBlendMode.h>
@@ -1109,7 +1110,7 @@
         }
         if (kFlushAfterEveryLayer) {
             ATRACE_NAME("flush surface");
-            activeSurface->flush();
+            skgpu::ganesh::Flush(activeSurface);
         }
     }
     for (const auto& borderRenderInfo : display.borderInfoList) {
@@ -1137,7 +1138,7 @@
     {
         ATRACE_NAME("flush surface");
         LOG_ALWAYS_FATAL_IF(activeSurface != dstSurface);
-        activeSurface->flush();
+        skgpu::ganesh::Flush(activeSurface);
     }
 
     auto drawFence = sp<Fence>::make(flushAndSubmit(grContext));
diff --git a/libs/renderengine/skia/filters/BlurFilter.cpp b/libs/renderengine/skia/filters/BlurFilter.cpp
index 2557ac9..1e0c4cf 100644
--- a/libs/renderengine/skia/filters/BlurFilter.cpp
+++ b/libs/renderengine/skia/filters/BlurFilter.cpp
@@ -16,6 +16,7 @@
 
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 #include "BlurFilter.h"
+#include <SkBlendMode.h>
 #include <SkCanvas.h>
 #include <SkPaint.h>
 #include <SkRRect.h>
@@ -23,6 +24,7 @@
 #include <SkSize.h>
 #include <SkString.h>
 #include <SkSurface.h>
+#include <SkTileMode.h>
 #include <log/log.h>
 #include <utils/Trace.h>
 
diff --git a/libs/renderengine/skia/filters/GaussianBlurFilter.cpp b/libs/renderengine/skia/filters/GaussianBlurFilter.cpp
index 511d7c9..e72c501 100644
--- a/libs/renderengine/skia/filters/GaussianBlurFilter.cpp
+++ b/libs/renderengine/skia/filters/GaussianBlurFilter.cpp
@@ -17,6 +17,7 @@
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
 #include "GaussianBlurFilter.h"
+#include <SkBlendMode.h>
 #include <SkCanvas.h>
 #include <SkPaint.h>
 #include <SkRRect.h>
@@ -25,6 +26,8 @@
 #include <SkSize.h>
 #include <SkString.h>
 #include <SkSurface.h>
+#include <SkTileMode.h>
+#include <include/gpu/ganesh/SkSurfaceGanesh.h>
 #include "include/gpu/GpuTypes.h" // from Skia
 #include <log/log.h>
 #include <utils/Trace.h>
@@ -45,8 +48,8 @@
     // Create blur surface with the bit depth and colorspace of the original surface
     SkImageInfo scaledInfo = input->imageInfo().makeWH(std::ceil(blurRect.width() * kInputScale),
                                                        std::ceil(blurRect.height() * kInputScale));
-    sk_sp<SkSurface> surface = SkSurface::MakeRenderTarget(context,
-                                                           skgpu::Budgeted::kNo, scaledInfo);
+    sk_sp<SkSurface> surface = SkSurfaces::RenderTarget(context,
+                                                        skgpu::Budgeted::kNo, scaledInfo);
 
     SkPaint paint;
     paint.setBlendMode(SkBlendMode::kSrc);
diff --git a/libs/renderengine/skia/filters/KawaseBlurFilter.cpp b/libs/renderengine/skia/filters/KawaseBlurFilter.cpp
index e370c39..d1d92e5 100644
--- a/libs/renderengine/skia/filters/KawaseBlurFilter.cpp
+++ b/libs/renderengine/skia/filters/KawaseBlurFilter.cpp
@@ -24,6 +24,7 @@
 #include <SkSize.h>
 #include <SkString.h>
 #include <SkSurface.h>
+#include <SkTileMode.h>
 #include <log/log.h>
 #include <utils/Trace.h>
 
diff --git a/libs/sensorprivacy/SensorPrivacyManager.cpp b/libs/sensorprivacy/SensorPrivacyManager.cpp
index 2be98e7..57c74ee 100644
--- a/libs/sensorprivacy/SensorPrivacyManager.cpp
+++ b/libs/sensorprivacy/SensorPrivacyManager.cpp
@@ -32,27 +32,12 @@
 sp<hardware::ISensorPrivacyManager> SensorPrivacyManager::getService()
 {
     std::lock_guard<Mutex> scoped_lock(mLock);
-    int64_t startTime = 0;
     sp<hardware::ISensorPrivacyManager> service = mService;
-    while (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
-        sp<IBinder> binder = defaultServiceManager()->checkService(String16("sensor_privacy"));
-        if (binder == nullptr) {
-            // Wait for the sensor privacy service to come back...
-            if (startTime == 0) {
-                startTime = uptimeMillis();
-                ALOGI("Waiting for sensor privacy service");
-            } else if ((uptimeMillis() - startTime) > 1000000) {
-                ALOGW("Waiting too long for sensor privacy service, giving up");
-                service = nullptr;
-                break;
-            }
-            usleep(25000);
-        } else {
-            service = interface_cast<hardware::ISensorPrivacyManager>(binder);
-            mService = service;
-        }
+    if (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
+      sp<IBinder> binder = defaultServiceManager()->waitForService(String16("sensor_privacy"));
+      mService = interface_cast<hardware::ISensorPrivacyManager>(binder);
     }
-    return service;
+    return mService;
 }
 
 bool SensorPrivacyManager::supportsSensorToggle(int toggleType, int sensor) {
diff --git a/libs/ui/include/ui/GraphicBuffer.h b/libs/ui/include/ui/GraphicBuffer.h
index dbe475b..f859848 100644
--- a/libs/ui/include/ui/GraphicBuffer.h
+++ b/libs/ui/include/ui/GraphicBuffer.h
@@ -36,6 +36,15 @@
 
 #include <hardware/gralloc.h>
 
+#if defined(__ANDROID_APEX__) || defined(__ANDROID_VNDK__)
+// TODO: Provide alternatives that aren't broken
+#define AHB_CONVERSION                                                                          \
+    [[deprecated("WARNING: VNDK casts beteween GraphicBuffer & AHardwareBuffer are UNSAFE and " \
+                 "will be removed in the future")]]
+#else
+#define AHB_CONVERSION
+#endif
+
 namespace android {
 
 class GraphicBufferMapper;
@@ -80,10 +89,10 @@
 
     static sp<GraphicBuffer> from(ANativeWindowBuffer *);
 
-    static GraphicBuffer* fromAHardwareBuffer(AHardwareBuffer*);
-    static GraphicBuffer const* fromAHardwareBuffer(AHardwareBuffer const*);
-    AHardwareBuffer* toAHardwareBuffer();
-    AHardwareBuffer const* toAHardwareBuffer() const;
+    AHB_CONVERSION static GraphicBuffer* fromAHardwareBuffer(AHardwareBuffer*);
+    AHB_CONVERSION static GraphicBuffer const* fromAHardwareBuffer(AHardwareBuffer const*);
+    AHB_CONVERSION AHardwareBuffer* toAHardwareBuffer();
+    AHB_CONVERSION AHardwareBuffer const* toAHardwareBuffer() const;
 
     // Create a GraphicBuffer to be unflatten'ed into or be reallocated.
     GraphicBuffer();
diff --git a/services/displayservice/Android.bp b/services/displayservice/Android.bp
index 8681784..c88f2fc 100644
--- a/services/displayservice/Android.bp
+++ b/services/displayservice/Android.bp
@@ -23,7 +23,7 @@
     default_applicable_licenses: ["frameworks_native_license"],
 }
 
-cc_library_shared {
+cc_library_static {
     name: "libdisplayservicehidl",
 
     srcs: [
@@ -37,18 +37,24 @@
         "libgui",
         "libhidlbase",
         "libutils",
+    ],
+
+    static_libs: [
         "android.frameworks.displayservice@1.0",
     ],
 
     export_include_dirs: ["include"],
     export_shared_lib_headers: [
-        "android.frameworks.displayservice@1.0",
         "libgui",
         "libutils",
     ],
 
+    export_static_lib_headers: [
+        "android.frameworks.displayservice@1.0",
+    ],
+
     cflags: [
         "-Werror",
         "-Wall",
-    ]
+    ],
 }
diff --git a/services/inputflinger/Android.bp b/services/inputflinger/Android.bp
index dc7c75a..b007fd3 100644
--- a/services/inputflinger/Android.bp
+++ b/services/inputflinger/Android.bp
@@ -79,6 +79,7 @@
         "libcrypto",
         "libcutils",
         "libhidlbase",
+        "libinput",
         "libkll",
         "liblog",
         "libprotobuf-cpp-lite",
@@ -95,14 +96,12 @@
         android: {
             shared_libs: [
                 "libgui",
-                "libinput",
                 "libstatspull",
                 "libstatssocket",
             ],
         },
         host: {
             static_libs: [
-                "libinput",
                 "libstatspull",
                 "libstatssocket",
             ],
@@ -179,6 +178,7 @@
         "libbase",
         "libbinder",
         "libcutils",
+        "libinput",
         "liblog",
         "libutils",
     ],
@@ -186,14 +186,8 @@
         "libinputflinger_headers",
     ],
     target: {
-        android: {
-            shared_libs: [
-                "libinput",
-            ],
-        },
         host: {
             static_libs: [
-                "libinput",
                 "libui-types",
             ],
         },
diff --git a/services/inputflinger/TEST_MAPPING b/services/inputflinger/TEST_MAPPING
index f0b1072..68af9b8 100644
--- a/services/inputflinger/TEST_MAPPING
+++ b/services/inputflinger/TEST_MAPPING
@@ -82,6 +82,14 @@
       ]
     },
     {
+      "name": "CtsAppTestCases",
+      "options": [
+        {
+          "include-filter": "android.app.cts.ToolbarActionBarTest"
+        }
+      ]
+    },
+    {
       "name": "FrameworksServicesTests",
       "options": [
         {
@@ -185,6 +193,14 @@
       ]
     },
     {
+      "name": "CtsAppTestCases",
+      "options": [
+        {
+          "include-filter": "android.app.cts.ToolbarActionBarTest"
+        }
+      ]
+    },
+    {
       "name": "FrameworksServicesTests",
       "options": [
         {
diff --git a/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp b/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
index b2e274d..7a41083 100644
--- a/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
+++ b/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
@@ -82,8 +82,6 @@
 
     void notifyVibratorState(int32_t deviceId, bool isOn) override {}
 
-    InputDispatcherConfiguration getDispatcherConfiguration() override { return mConfig; }
-
     bool filterInputEvent(const InputEvent& inputEvent, uint32_t policyFlags) override {
         return true; // dispatch event normally
     }
diff --git a/services/inputflinger/dispatcher/Android.bp b/services/inputflinger/dispatcher/Android.bp
index 492551e..8b57730 100644
--- a/services/inputflinger/dispatcher/Android.bp
+++ b/services/inputflinger/dispatcher/Android.bp
@@ -59,6 +59,7 @@
         "libbase",
         "libcrypto",
         "libcutils",
+        "libinput",
         "libkll",
         "liblog",
         "libprotobuf-cpp-lite",
@@ -74,14 +75,12 @@
         android: {
             shared_libs: [
                 "libgui",
-                "libinput",
                 "libstatspull",
                 "libstatssocket",
             ],
         },
         host: {
             static_libs: [
-                "libinput",
                 "libstatspull",
                 "libstatssocket",
             ],
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index baa7a82..1cb0450 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -4353,7 +4353,7 @@
             validateMotionEvent(args.action, args.actionButton, args.getPointerCount(),
                                 args.pointerProperties.data());
     if (!motionCheck.ok()) {
-        LOG(ERROR) << "Invalid event: " << args.dump() << "; reason: " << motionCheck.error();
+        LOG(FATAL) << "Invalid event: " << args.dump() << "; reason: " << motionCheck.error();
         return;
     }
 
@@ -6797,13 +6797,6 @@
     mLooper->wake();
 }
 
-void InputDispatcher::requestRefreshConfiguration() {
-    InputDispatcherConfiguration config = mPolicy.getDispatcherConfiguration();
-
-    std::scoped_lock _l(mLock);
-    mConfig = config;
-}
-
 void InputDispatcher::setMonitorDispatchingTimeoutForTest(std::chrono::nanoseconds timeout) {
     std::scoped_lock _l(mLock);
     mMonitorDispatchingTimeout = timeout;
@@ -6915,4 +6908,11 @@
     return nullptr;
 }
 
+void InputDispatcher::setKeyRepeatConfiguration(nsecs_t timeout, nsecs_t delay) {
+    std::scoped_lock _l(mLock);
+
+    mConfig.keyRepeatTimeout = timeout;
+    mConfig.keyRepeatDelay = delay;
+}
+
 } // namespace android::inputdispatcher
diff --git a/services/inputflinger/dispatcher/InputDispatcher.h b/services/inputflinger/dispatcher/InputDispatcher.h
index cdce492..78d268d 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.h
+++ b/services/inputflinger/dispatcher/InputDispatcher.h
@@ -148,11 +148,11 @@
 
     void cancelCurrentTouch() override;
 
-    void requestRefreshConfiguration() override;
-
     // Public to allow tests to verify that a Monitor can get ANR.
     void setMonitorDispatchingTimeoutForTest(std::chrono::nanoseconds timeout);
 
+    void setKeyRepeatConfiguration(nsecs_t timeout, nsecs_t delay) override;
+
 private:
     enum class DropReason {
         NOT_DROPPED,
diff --git a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
index 49597e2..f13885a 100644
--- a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
+++ b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
@@ -226,11 +226,10 @@
      */
     virtual void cancelCurrentTouch() = 0;
 
-    /**
-     * Request that the InputDispatcher's configuration, which can be obtained through the policy,
-     * be updated.
+    /*
+     * Updates key repeat configuration timeout and delay.
      */
-    virtual void requestRefreshConfiguration() = 0;
+    virtual void setKeyRepeatConfiguration(nsecs_t timeout, nsecs_t delay) = 0;
 };
 
 } // namespace android
diff --git a/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h b/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h
index 729d01f..af28e48 100644
--- a/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h
+++ b/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h
@@ -73,9 +73,6 @@
                                       InputDeviceSensorAccuracy accuracy) = 0;
     virtual void notifyVibratorState(int32_t deviceId, bool isOn) = 0;
 
-    /* Gets the input dispatcher configuration. */
-    virtual InputDispatcherConfiguration getDispatcherConfiguration() = 0;
-
     /* Filters an input event.
      * Return true to dispatch the event unmodified, false to consume the event.
      * A filter can also transform and inject events later by passing POLICY_FLAG_FILTERED
diff --git a/services/inputflinger/reader/Android.bp b/services/inputflinger/reader/Android.bp
index ccb8773..c0c6d1f 100644
--- a/services/inputflinger/reader/Android.bp
+++ b/services/inputflinger/reader/Android.bp
@@ -52,6 +52,7 @@
         "mapper/RotaryEncoderInputMapper.cpp",
         "mapper/SensorInputMapper.cpp",
         "mapper/SingleTouchInputMapper.cpp",
+        "mapper/SlopController.cpp",
         "mapper/SwitchInputMapper.cpp",
         "mapper/TouchCursorInputMapperCommon.cpp",
         "mapper/TouchInputMapper.cpp",
@@ -79,6 +80,7 @@
         "libcrypto",
         "libcutils",
         "libjsoncpp",
+        "libinput",
         "liblog",
         "libPlatformProperties",
         "libstatslog",
@@ -97,13 +99,11 @@
     target: {
         android: {
             shared_libs: [
-                "libinput",
                 "libstatspull",
             ],
         },
         host: {
             static_libs: [
-                "libinput",
                 "libbinder",
                 "libstatspull",
             ],
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
index 7388752..e03a773 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
@@ -205,6 +205,7 @@
     int32_t keyCode;
     int32_t keyMetaState;
     uint32_t policyFlags;
+    int32_t flags = AKEY_EVENT_FLAG_FROM_SYSTEM;
 
     if (getDeviceContext().mapKey(scanCode, usageCode, mMetaState, &keyCode, &keyMetaState,
                                   &policyFlags)) {
@@ -226,6 +227,7 @@
             // key repeat, be sure to use same keycode as before in case of rotation
             keyCode = mKeyDowns[*keyDownIndex].keyCode;
             downTime = mKeyDowns[*keyDownIndex].downTime;
+            flags = mKeyDowns[*keyDownIndex].flags;
         } else {
             // key down
             if ((policyFlags & POLICY_FLAG_VIRTUAL) &&
@@ -234,12 +236,14 @@
             }
             if (policyFlags & POLICY_FLAG_GESTURE) {
                 out += getDeviceContext().cancelTouch(when, readTime);
+                flags |= AKEY_EVENT_FLAG_KEEP_TOUCH_MODE;
             }
 
             KeyDown keyDown;
             keyDown.keyCode = keyCode;
             keyDown.scanCode = scanCode;
             keyDown.downTime = when;
+            keyDown.flags = flags;
             mKeyDowns.push_back(keyDown);
         }
     } else {
@@ -248,6 +252,7 @@
             // key up, be sure to use same keycode as before in case of rotation
             keyCode = mKeyDowns[*keyDownIndex].keyCode;
             downTime = mKeyDowns[*keyDownIndex].downTime;
+            flags = mKeyDowns[*keyDownIndex].flags;
             mKeyDowns.erase(mKeyDowns.begin() + *keyDownIndex);
         } else {
             // key was not actually down
@@ -281,9 +286,8 @@
 
     out.emplace_back(NotifyKeyArgs(getContext()->getNextId(), when, readTime, getDeviceId(),
                                    mSource, getDisplayId(), policyFlags,
-                                   down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
-                                   AKEY_EVENT_FLAG_FROM_SYSTEM, keyCode, scanCode, keyMetaState,
-                                   downTime));
+                                   down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP, flags,
+                                   keyCode, scanCode, keyMetaState, downTime));
     return out;
 }
 
@@ -410,7 +414,7 @@
         out.emplace_back(NotifyKeyArgs(getContext()->getNextId(), when,
                                        systemTime(SYSTEM_TIME_MONOTONIC), getDeviceId(), mSource,
                                        getDisplayId(), /*policyFlags=*/0, AKEY_EVENT_ACTION_UP,
-                                       AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_CANCELED,
+                                       mKeyDowns[i].flags | AKEY_EVENT_FLAG_CANCELED,
                                        mKeyDowns[i].keyCode, mKeyDowns[i].scanCode, AMETA_NONE,
                                        mKeyDowns[i].downTime));
     }
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.h b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
index cd3d3c4..45fd68b 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.h
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
@@ -57,6 +57,7 @@
         nsecs_t downTime{};
         int32_t keyCode{};
         int32_t scanCode{};
+        int32_t flags{};
     };
 
     uint32_t mSource{};
diff --git a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
index 13f2e59..5220b10 100644
--- a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
@@ -30,6 +30,14 @@
                                                    const InputReaderConfiguration& readerConfig)
       : InputMapper(deviceContext, readerConfig), mOrientation(ui::ROTATION_0) {
     mSource = AINPUT_SOURCE_ROTARY_ENCODER;
+
+    const PropertyMap& config = getDeviceContext().getConfiguration();
+    float slopThreshold = config.getInt("rotary_encoder.slop_threshold").value_or(0);
+    int32_t slopDurationMs = config.getInt("rotary_encoder.slop_duration_ms").value_or(0);
+    if (slopThreshold > 0 && slopDurationMs > 0) {
+        mSlopController = std::make_unique<SlopController>(slopThreshold,
+                                                           (nsecs_t)(slopDurationMs * 1000000));
+    }
 }
 
 RotaryEncoderInputMapper::~RotaryEncoderInputMapper() {}
@@ -103,6 +111,10 @@
     std::list<NotifyArgs> out;
 
     float scroll = mRotaryEncoderScrollAccumulator.getRelativeVWheel();
+    if (mSlopController) {
+        scroll = mSlopController->consumeEvent(when, scroll);
+    }
+
     bool scrolled = scroll != 0;
 
     // Send motion event.
diff --git a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h
index 9e2e8c4..4732bcd 100644
--- a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h
+++ b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h
@@ -20,6 +20,7 @@
 
 #include "CursorScrollAccumulator.h"
 #include "InputMapper.h"
+#include "SlopController.h"
 
 namespace android {
 
@@ -46,6 +47,7 @@
     int32_t mSource;
     float mScalingFactor;
     ui::Rotation mOrientation;
+    std::unique_ptr<SlopController> mSlopController = nullptr;
 
     explicit RotaryEncoderInputMapper(InputDeviceContext& deviceContext,
                                       const InputReaderConfiguration& readerConfig);
diff --git a/services/inputflinger/reader/mapper/SlopController.cpp b/services/inputflinger/reader/mapper/SlopController.cpp
new file mode 100644
index 0000000..6f31d0e
--- /dev/null
+++ b/services/inputflinger/reader/mapper/SlopController.cpp
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2023 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.
+ */
+
+// clang-format off
+#include "../Macros.h"
+// clang-format on
+
+#include "SlopController.h"
+
+namespace {
+int signOf(float value) {
+    if (value == 0) return 0;
+    if (value > 0) return 1;
+    return -1;
+}
+} // namespace
+
+namespace android {
+
+SlopController::SlopController(float slopThreshold, nsecs_t slopDurationNanos)
+      : mSlopThreshold(slopThreshold), mSlopDurationNanos(slopDurationNanos) {}
+
+SlopController::~SlopController() {}
+
+float SlopController::consumeEvent(nsecs_t eventTimeNanos, float value) {
+    if (mSlopDurationNanos == 0) {
+        return value;
+    }
+
+    if (shouldResetSlopTracking(eventTimeNanos, value)) {
+        mCumulativeValue = 0;
+        mHasSlopBeenMet = false;
+    }
+
+    mLastEventTimeNanos = eventTimeNanos;
+
+    if (mHasSlopBeenMet) {
+        // Since slop has already been met, we know that all of the current value would pass the
+        // slop threshold. So return that, without any further processing.
+        return value;
+    }
+
+    mCumulativeValue += value;
+
+    if (abs(mCumulativeValue) >= mSlopThreshold) {
+        mHasSlopBeenMet = true;
+        // Return the amount of value that exceeds the slop.
+        return signOf(value) * (abs(mCumulativeValue) - mSlopThreshold);
+    }
+
+    return 0;
+}
+
+bool SlopController::shouldResetSlopTracking(nsecs_t eventTimeNanos, float value) {
+    const nsecs_t ageNanos = eventTimeNanos - mLastEventTimeNanos;
+    if (ageNanos >= mSlopDurationNanos) {
+        return true;
+    }
+    if (value == 0) {
+        return false;
+    }
+    if (signOf(mCumulativeValue) != signOf(value)) {
+        return true;
+    }
+    return false;
+}
+
+} // namespace android
diff --git a/services/inputflinger/reader/mapper/SlopController.h b/services/inputflinger/reader/mapper/SlopController.h
new file mode 100644
index 0000000..bd6ee77
--- /dev/null
+++ b/services/inputflinger/reader/mapper/SlopController.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2023 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 <utils/Timers.h>
+
+namespace android {
+
+/**
+ * Controls a slop logic. Slop here refers to an approach to try and drop insignificant input
+ * events. This is helpful in cases where unintentional input events may cause unintended outcomes,
+ * like scrolling a screen or keeping the screen awake.
+ *
+ * Current slop logic:
+ *      "If time since last event > Xns, then discard the next N values."
+ */
+class SlopController {
+public:
+    SlopController(float slopThreshold, nsecs_t slopDurationNanos);
+    virtual ~SlopController();
+
+    /**
+     * Consumes an event with a given time and value for slop processing.
+     * Returns an amount <=value that should be consumed.
+     */
+    float consumeEvent(nsecs_t eventTime, float value);
+
+private:
+    bool shouldResetSlopTracking(nsecs_t eventTimeNanos, float value);
+
+    /** The amount of event values ignored after an inactivity of the slop duration. */
+    const float mSlopThreshold;
+    /** The duration of inactivity that resets slop controlling. */
+    const nsecs_t mSlopDurationNanos;
+
+    nsecs_t mLastEventTimeNanos = 0;
+    float mCumulativeValue = 0;
+    bool mHasSlopBeenMet = false;
+};
+
+} // namespace android
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.cpp b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
index f2b0a4b..44538f1 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
@@ -271,7 +271,7 @@
                          toString(mFusedStylusPointerId).c_str());
     dump += StringPrintf(INDENT4 "External Stylus Data Timeout: %" PRId64 "\n",
                          mExternalStylusFusionTimeout);
-    dump += StringPrintf(INDENT4 " External Stylus Buttons Applied: 0x%08x",
+    dump += StringPrintf(INDENT4 "External Stylus Buttons Applied: 0x%08x\n",
                          mExternalStylusButtonsApplied);
     dump += INDENT3 "External Stylus State:\n";
     dumpStylusState(dump, mExternalStylusState);
@@ -972,7 +972,18 @@
             (rawXResolution > 0 && rawYResolution > 0) ? (rawXResolution + rawYResolution) / 2 : 0;
 
     const DisplayViewport& newViewport = newViewportOpt.value_or(kUninitializedViewport);
-    const bool viewportChanged = mViewport != newViewport;
+    bool viewportChanged;
+    if (mParameters.enableForInactiveViewport) {
+        // When touch is enabled for an inactive viewport, ignore the
+        // viewport active status when checking whether the viewport has
+        // changed.
+        DisplayViewport tempViewport = mViewport;
+        tempViewport.isActive = newViewport.isActive;
+        viewportChanged = tempViewport != newViewport;
+    } else {
+        viewportChanged = mViewport != newViewport;
+    }
+
     bool skipViewportUpdate = false;
     if (viewportChanged) {
         const bool viewportOrientationChanged = mViewport.orientation != newViewport.orientation;
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.h b/services/inputflinger/reader/mapper/TouchInputMapper.h
index d8b59ca..c5dfb00 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.h
@@ -195,9 +195,9 @@
     enum class DeviceMode {
         DISABLED,   // input is disabled
         DIRECT,     // direct mapping (touchscreen)
-        UNSCALED,   // unscaled mapping (touchpad)
+        UNSCALED,   // unscaled mapping (e.g. captured touchpad)
         NAVIGATION, // unscaled mapping with assist gesture (touch navigation)
-        POINTER,    // pointer mapping (pointer)
+        POINTER,    // pointer mapping (e.g. uncaptured touchpad, drawing tablet)
 
         ftl_last = POINTER
     };
diff --git a/services/inputflinger/tests/Android.bp b/services/inputflinger/tests/Android.bp
index 300bb85..187bc0a 100644
--- a/services/inputflinger/tests/Android.bp
+++ b/services/inputflinger/tests/Android.bp
@@ -59,6 +59,7 @@
         "NotifyArgs_test.cpp",
         "PreferStylusOverTouch_test.cpp",
         "PropertyProvider_test.cpp",
+        "SlopController_test.cpp",
         "SyncQueue_test.cpp",
         "TestInputListener.cpp",
         "TouchpadInputMapper_test.cpp",
@@ -74,7 +75,6 @@
     target: {
         android: {
             shared_libs: [
-                "libinput",
                 "libvintf",
             ],
         },
@@ -89,9 +89,6 @@
             cflags: [
                 "-D__ANDROID_HOST__",
             ],
-            static_libs: [
-                "libinput",
-            ],
         },
     },
     sanitize: {
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 3aec02c..b0e3f1e 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -206,11 +206,9 @@
 // --- FakeInputDispatcherPolicy ---
 
 class FakeInputDispatcherPolicy : public InputDispatcherPolicyInterface {
-    InputDispatcherConfiguration mConfig;
-
     struct AnrResult {
         sp<IBinder> token{};
-        gui::Pid pid{-1};
+        gui::Pid pid{gui::Pid::INVALID};
     };
 
 public:
@@ -349,11 +347,6 @@
                    "signal";
     }
 
-    void setKeyRepeatConfiguration(nsecs_t timeout, nsecs_t delay) {
-        mConfig.keyRepeatTimeout = timeout;
-        mConfig.keyRepeatDelay = delay;
-    }
-
     PointerCaptureRequest assertSetPointerCaptureCalled(bool enabled) {
         std::unique_lock lock(mLock);
         base::ScopedLockAssertion assumeLocked(mLock);
@@ -550,8 +543,6 @@
 
     void notifyVibratorState(int32_t deviceId, bool isOn) override {}
 
-    InputDispatcherConfiguration getDispatcherConfiguration() override { return mConfig; }
-
     bool filterInputEvent(const InputEvent& inputEvent, uint32_t policyFlags) override {
         std::scoped_lock lock(mLock);
         switch (inputEvent.getType()) {
@@ -5705,10 +5696,9 @@
 
     virtual void SetUp() override {
         mFakePolicy = std::make_unique<FakeInputDispatcherPolicy>();
-        mFakePolicy->setKeyRepeatConfiguration(KEY_REPEAT_TIMEOUT, KEY_REPEAT_DELAY);
         mDispatcher = std::make_unique<InputDispatcher>(*mFakePolicy);
-        mDispatcher->requestRefreshConfiguration();
         mDispatcher->setInputDispatchMode(/*enabled*/ true, /*frozen*/ false);
+        mDispatcher->setKeyRepeatConfiguration(KEY_REPEAT_TIMEOUT, KEY_REPEAT_DELAY);
         ASSERT_EQ(OK, mDispatcher->start());
 
         setUpWindow();
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index d1c3f7d..5fb364d 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -3727,6 +3727,19 @@
     ASSERT_EQ("extended", mDevice->getDeviceInfo().getKeyboardLayoutInfo()->layoutType);
 }
 
+TEST_F(KeyboardInputMapperTest, Process_GesureEventToSetFlagKeepTouchMode) {
+    mFakeEventHub->addKey(EVENTHUB_ID, KEY_LEFT, 0, AKEYCODE_DPAD_LEFT, POLICY_FLAG_GESTURE);
+    KeyboardInputMapper& mapper =
+            constructAndAddMapper<KeyboardInputMapper>(AINPUT_SOURCE_KEYBOARD,
+                                                       AINPUT_KEYBOARD_TYPE_ALPHABETIC);
+    NotifyKeyArgs args;
+
+    // Key down
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_LEFT, 1);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
+    ASSERT_EQ(AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_KEEP_TOUCH_MODE, args.flags);
+}
+
 // --- KeyboardInputMapperTest_ExternalDevice ---
 
 class KeyboardInputMapperTest_ExternalDevice : public InputMapperTest {
@@ -9373,6 +9386,11 @@
     EXPECT_EQ(AMOTION_EVENT_ACTION_DOWN, motionArgs.action);
 }
 
+/**
+ * When the viewport is deactivated (isActive transitions from true to false),
+ * and touch.enableForInactiveViewport is false, touches prior to the transition
+ * should be cancelled.
+ */
 TEST_F(MultiTouchInputMapperTest, Process_DeactivateViewport_AbortTouches) {
     addConfigurationProperty("touch.deviceType", "touchScreen");
     addConfigurationProperty("touch.enableForInactiveViewport", "0");
@@ -9424,6 +9442,60 @@
     EXPECT_EQ(AMOTION_EVENT_ACTION_DOWN, motionArgs.action);
 }
 
+/**
+ * When the viewport is deactivated (isActive transitions from true to false),
+ * and touch.enableForInactiveViewport is true, touches prior to the transition
+ * should not be cancelled.
+ */
+TEST_F(MultiTouchInputMapperTest, Process_DeactivateViewport_TouchesNotAborted) {
+    addConfigurationProperty("touch.deviceType", "touchScreen");
+    addConfigurationProperty("touch.enableForInactiveViewport", "1");
+    mFakePolicy->addDisplayViewport(DISPLAY_ID, DISPLAY_WIDTH, DISPLAY_HEIGHT, ui::ROTATION_0,
+                                    /*isActive=*/true, UNIQUE_ID, NO_PORT, ViewportType::INTERNAL);
+    std::optional<DisplayViewport> optionalDisplayViewport =
+            mFakePolicy->getDisplayViewportByUniqueId(UNIQUE_ID);
+    ASSERT_TRUE(optionalDisplayViewport.has_value());
+    DisplayViewport displayViewport = *optionalDisplayViewport;
+
+    configureDevice(InputReaderConfiguration::Change::DISPLAY_INFO);
+    prepareAxes(POSITION);
+    MultiTouchInputMapper& mapper = constructAndAddMapper<MultiTouchInputMapper>();
+
+    // Finger down
+    int32_t x = 100, y = 100;
+    processPosition(mapper, x, y);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(
+            WithMotionAction(AMOTION_EVENT_ACTION_DOWN)));
+
+    // Deactivate display viewport
+    displayViewport.isActive = false;
+    ASSERT_TRUE(mFakePolicy->updateViewport(displayViewport));
+    configureDevice(InputReaderConfiguration::Change::DISPLAY_INFO);
+
+    // The ongoing touch should not be canceled
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasNotCalled());
+
+    // Finger move is not ignored
+    x += 10, y += 10;
+    processPosition(mapper, x, y);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(
+            WithMotionAction(AMOTION_EVENT_ACTION_MOVE)));
+
+    // Reactivate display viewport
+    displayViewport.isActive = true;
+    ASSERT_TRUE(mFakePolicy->updateViewport(displayViewport));
+    configureDevice(InputReaderConfiguration::Change::DISPLAY_INFO);
+
+    // Finger move continues and does not start new gesture
+    x += 10, y += 10;
+    processPosition(mapper, x, y);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(
+            WithMotionAction(AMOTION_EVENT_ACTION_MOVE)));
+}
+
 TEST_F(MultiTouchInputMapperTest, Process_Pointer_ShowTouches) {
     // Setup the first touch screen device.
     prepareAxes(POSITION | ID | SLOT);
diff --git a/services/inputflinger/tests/SlopController_test.cpp b/services/inputflinger/tests/SlopController_test.cpp
new file mode 100644
index 0000000..f524acd
--- /dev/null
+++ b/services/inputflinger/tests/SlopController_test.cpp
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2023 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 "../reader/mapper/SlopController.h"
+
+#include <gtest/gtest.h>
+
+namespace android {
+
+// --- SlopControllerTest ---
+
+TEST(SlopControllerTest, PositiveValues) {
+    SlopController controller = SlopController(/*slopThreshold=*/5, /*slopDurationNanos=*/100);
+
+    ASSERT_EQ(0, controller.consumeEvent(1000, 1));
+    ASSERT_EQ(0, controller.consumeEvent(1003, 3));
+    ASSERT_EQ(2, controller.consumeEvent(1005, 3));
+    ASSERT_EQ(4, controller.consumeEvent(1009, 4));
+
+    SlopController controller2 = SlopController(/*slopThreshold=*/5, /*slopDurationNanos=*/100);
+
+    ASSERT_EQ(0, controller2.consumeEvent(1000, 5));
+    ASSERT_EQ(3, controller2.consumeEvent(1003, 3));
+    ASSERT_EQ(4, controller2.consumeEvent(1005, 4));
+}
+
+TEST(SlopControllerTest, NegativeValues) {
+    SlopController controller = SlopController(/*slopThreshold=*/5, /*slopDurationNanos=*/100);
+
+    ASSERT_EQ(0, controller.consumeEvent(1000, -1));
+    ASSERT_EQ(0, controller.consumeEvent(1003, -3));
+    ASSERT_EQ(-2, controller.consumeEvent(1005, -3));
+    ASSERT_EQ(-4, controller.consumeEvent(1009, -4));
+
+    SlopController controller2 = SlopController(/*slopThreshold=*/5, /*slopDurationNanos=*/100);
+
+    ASSERT_EQ(0, controller2.consumeEvent(1000, -5));
+    ASSERT_EQ(-3, controller2.consumeEvent(1003, -3));
+    ASSERT_EQ(-4, controller2.consumeEvent(1005, -4));
+}
+
+TEST(SlopControllerTest, ZeroDoesNotResetSlop) {
+    SlopController controller = SlopController(/*slopThreshold=*/5, /*slopDurationNanos=*/100);
+
+    ASSERT_EQ(1, controller.consumeEvent(1005, 6));
+    ASSERT_EQ(0, controller.consumeEvent(1006, 0));
+    ASSERT_EQ(2, controller.consumeEvent(1008, 2));
+}
+
+TEST(SlopControllerTest, SignChange_ResetsSlop) {
+    SlopController controller = SlopController(/*slopThreshold=*/5, /*slopDurationNanos=*/100);
+
+    ASSERT_EQ(0, controller.consumeEvent(1000, 2));
+    ASSERT_EQ(0, controller.consumeEvent(1001, -4));
+    ASSERT_EQ(0, controller.consumeEvent(1002, 3));
+    ASSERT_EQ(0, controller.consumeEvent(1003, -2));
+
+    ASSERT_EQ(1, controller.consumeEvent(1005, 6));
+    ASSERT_EQ(0, controller.consumeEvent(1006, 0));
+    ASSERT_EQ(2, controller.consumeEvent(1008, 2));
+
+    ASSERT_EQ(0, controller.consumeEvent(1010, -4));
+    ASSERT_EQ(-1, controller.consumeEvent(1011, -2));
+
+    ASSERT_EQ(0, controller.consumeEvent(1015, 5));
+    ASSERT_EQ(2, controller.consumeEvent(1016, 2));
+
+    ASSERT_EQ(0, controller.consumeEvent(1017, -5));
+    ASSERT_EQ(-2, controller.consumeEvent(1018, -2));
+}
+
+TEST(SlopControllerTest, OldAge_ResetsSlop) {
+    SlopController controller = SlopController(/*slopThreshold=*/5, /*slopDurationNanos=*/100);
+
+    ASSERT_EQ(1, controller.consumeEvent(1005, 6));
+    ASSERT_EQ(0, controller.consumeEvent(1108, 2)); // age exceeds slop duration
+
+    ASSERT_EQ(1, controller.consumeEvent(1110, 4));
+    ASSERT_EQ(0, controller.consumeEvent(1210, 2)); // age equals slop duration
+
+    ASSERT_EQ(0, controller.consumeEvent(1215, -3));
+    ASSERT_EQ(-2, controller.consumeEvent(1216, -4));
+    ASSERT_EQ(-5, controller.consumeEvent(1315, -5));
+}
+
+} // namespace android
diff --git a/services/powermanager/Android.bp b/services/powermanager/Android.bp
index b34e54f..2523f3b 100644
--- a/services/powermanager/Android.bp
+++ b/services/powermanager/Android.bp
@@ -33,6 +33,7 @@
 
     shared_libs: [
         "libbinder",
+        "libbinder_ndk",
         "libhidlbase",
         "liblog",
         "libutils",
@@ -40,7 +41,7 @@
         "android.hardware.power@1.1",
         "android.hardware.power@1.2",
         "android.hardware.power@1.3",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
     ],
 
     export_shared_lib_headers: [
@@ -48,7 +49,7 @@
         "android.hardware.power@1.1",
         "android.hardware.power@1.2",
         "android.hardware.power@1.3",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
     ],
 
     cflags: [
diff --git a/services/powermanager/PowerHalController.cpp b/services/powermanager/PowerHalController.cpp
index f89035f..9a23c84 100644
--- a/services/powermanager/PowerHalController.cpp
+++ b/services/powermanager/PowerHalController.cpp
@@ -15,11 +15,11 @@
  */
 
 #define LOG_TAG "PowerHalController"
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPowerHintSession.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <android/hardware/power/1.1/IPower.h>
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/IPowerHintSession.h>
-#include <android/hardware/power/Mode.h>
 #include <powermanager/PowerHalController.h>
 #include <powermanager/PowerHalLoader.h>
 #include <utils/Log.h>
@@ -33,7 +33,8 @@
 // -------------------------------------------------------------------------------------------------
 
 std::unique_ptr<HalWrapper> HalConnector::connect() {
-    if (sp<IPower> halAidl = PowerHalLoader::loadAidl()) {
+    if (std::shared_ptr<aidl::android::hardware::power::IPower> halAidl =
+                PowerHalLoader::loadAidl()) {
         return std::make_unique<AidlHalWrapper>(halAidl);
     }
     // If V1_0 isn't defined, none of them are
@@ -90,20 +91,24 @@
     return result;
 }
 
-HalResult<void> PowerHalController::setBoost(Boost boost, int32_t durationMs) {
+HalResult<void> PowerHalController::setBoost(aidl::android::hardware::power::Boost boost,
+                                             int32_t durationMs) {
     std::shared_ptr<HalWrapper> handle = initHal();
     auto result = handle->setBoost(boost, durationMs);
     return processHalResult(result, "setBoost");
 }
 
-HalResult<void> PowerHalController::setMode(Mode mode, bool enabled) {
+HalResult<void> PowerHalController::setMode(aidl::android::hardware::power::Mode mode,
+                                            bool enabled) {
     std::shared_ptr<HalWrapper> handle = initHal();
     auto result = handle->setMode(mode, enabled);
     return processHalResult(result, "setMode");
 }
 
-HalResult<sp<IPowerHintSession>> PowerHalController::createHintSession(
-        int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds, int64_t durationNanos) {
+HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>
+PowerHalController::createHintSession(int32_t tgid, int32_t uid,
+                                      const std::vector<int32_t>& threadIds,
+                                      int64_t durationNanos) {
     std::shared_ptr<HalWrapper> handle = initHal();
     auto result = handle->createHintSession(tgid, uid, threadIds, durationNanos);
     return processHalResult(result, "createHintSession");
diff --git a/services/powermanager/PowerHalLoader.cpp b/services/powermanager/PowerHalLoader.cpp
index 6bd40f8..2214461 100644
--- a/services/powermanager/PowerHalLoader.cpp
+++ b/services/powermanager/PowerHalLoader.cpp
@@ -16,10 +16,11 @@
 
 #define LOG_TAG "PowerHalLoader"
 
+#include <aidl/android/hardware/power/IPower.h>
+#include <android/binder_manager.h>
 #include <android/hardware/power/1.1/IPower.h>
 #include <android/hardware/power/1.2/IPower.h>
 #include <android/hardware/power/1.3/IPower.h>
-#include <android/hardware/power/IPower.h>
 #include <binder/IServiceManager.h>
 #include <hardware/power.h>
 #include <hardware_legacy/power.h>
@@ -54,7 +55,7 @@
 // -------------------------------------------------------------------------------------------------
 
 std::mutex PowerHalLoader::gHalMutex;
-sp<IPower> PowerHalLoader::gHalAidl = nullptr;
+std::shared_ptr<aidl::android::hardware::power::IPower> PowerHalLoader::gHalAidl = nullptr;
 sp<V1_0::IPower> PowerHalLoader::gHalHidlV1_0 = nullptr;
 sp<V1_1::IPower> PowerHalLoader::gHalHidlV1_1 = nullptr;
 sp<V1_2::IPower> PowerHalLoader::gHalHidlV1_2 = nullptr;
@@ -69,11 +70,30 @@
     gHalHidlV1_3 = nullptr;
 }
 
-sp<IPower> PowerHalLoader::loadAidl() {
+std::shared_ptr<aidl::android::hardware::power::IPower> PowerHalLoader::loadAidl() {
     std::lock_guard<std::mutex> lock(gHalMutex);
     static bool gHalExists = true;
-    static auto loadFn = []() { return waitForVintfService<IPower>(); };
-    return loadHal<IPower>(gHalExists, gHalAidl, loadFn, "AIDL");
+    if (!gHalExists) {
+        return nullptr;
+    }
+    if (gHalAidl) {
+        return gHalAidl;
+    }
+    auto aidlServiceName =
+            std::string(aidl::android::hardware::power::IPower::descriptor) + "/default";
+    if (!AServiceManager_isDeclared(aidlServiceName.c_str())) {
+        gHalExists = false;
+        return nullptr;
+    }
+    gHalAidl = aidl::android::hardware::power::IPower::fromBinder(
+            ndk::SpAIBinder(AServiceManager_waitForService(aidlServiceName.c_str())));
+    if (gHalAidl) {
+        ALOGI("Successfully connected to Power HAL AIDL service.");
+    } else {
+        ALOGI("Power HAL AIDL service not available.");
+        gHalExists = false;
+    }
+    return gHalAidl;
 }
 
 sp<V1_0::IPower> PowerHalLoader::loadHidlV1_0() {
diff --git a/services/powermanager/PowerHalWrapper.cpp b/services/powermanager/PowerHalWrapper.cpp
index 9e7adf8..76afbfc 100644
--- a/services/powermanager/PowerHalWrapper.cpp
+++ b/services/powermanager/PowerHalWrapper.cpp
@@ -15,86 +15,49 @@
  */
 
 #define LOG_TAG "HalWrapper"
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPowerHintSession.h>
-#include <android/hardware/power/Mode.h>
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPowerHintSession.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <powermanager/PowerHalWrapper.h>
 #include <utils/Log.h>
 
 #include <cinttypes>
 
 using namespace android::hardware::power;
-namespace Aidl = android::hardware::power;
+namespace Aidl = aidl::android::hardware::power;
 
 namespace android {
 
 namespace power {
 
 // -------------------------------------------------------------------------------------------------
-
-inline HalResult<void> toHalResult(const binder::Status& result) {
+inline HalResult<void> toHalResult(const ndk::ScopedAStatus& result) {
     if (result.isOk()) {
         return HalResult<void>::ok();
     }
-    ALOGE("Power HAL request failed: %s", result.toString8().c_str());
-    return HalResult<void>::fromStatus(result);
-}
-
-template <typename T>
-template <typename R>
-HalResult<T> HalResult<T>::fromReturn(hardware::Return<R>& ret, T data) {
-    return ret.isOk() ? HalResult<T>::ok(data) : HalResult<T>::failed(ret.description());
-}
-
-template <typename T>
-template <typename R>
-HalResult<T> HalResult<T>::fromReturn(hardware::Return<R>& ret, V1_0::Status status, T data) {
-    return ret.isOk() ? HalResult<T>::fromStatus(status, data)
-                      : HalResult<T>::failed(ret.description());
+    ALOGE("Power HAL request failed: %s", result.getDescription().c_str());
+    return HalResult<void>::failed(result.getDescription());
 }
 
 // -------------------------------------------------------------------------------------------------
 
-HalResult<void> HalResult<void>::fromStatus(status_t status) {
-    if (status == android::OK) {
-        return HalResult<void>::ok();
-    }
-    return HalResult<void>::failed(statusToString(status));
-}
-
-HalResult<void> HalResult<void>::fromStatus(binder::Status status) {
-    if (status.exceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
-        return HalResult<void>::unsupported();
-    }
-    if (status.isOk()) {
-        return HalResult<void>::ok();
-    }
-    return HalResult<void>::failed(std::string(status.toString8().c_str()));
-}
-
-template <typename R>
-HalResult<void> HalResult<void>::fromReturn(hardware::Return<R>& ret) {
-    return ret.isOk() ? HalResult<void>::ok() : HalResult<void>::failed(ret.description());
-}
-// -------------------------------------------------------------------------------------------------
-
-HalResult<void> EmptyHalWrapper::setBoost(Boost boost, int32_t durationMs) {
+HalResult<void> EmptyHalWrapper::setBoost(Aidl::Boost boost, int32_t durationMs) {
     ALOGV("Skipped setBoost %s with duration %dms because Power HAL not available",
           toString(boost).c_str(), durationMs);
     return HalResult<void>::unsupported();
 }
 
-HalResult<void> EmptyHalWrapper::setMode(Mode mode, bool enabled) {
+HalResult<void> EmptyHalWrapper::setMode(Aidl::Mode mode, bool enabled) {
     ALOGV("Skipped setMode %s to %s because Power HAL not available", toString(mode).c_str(),
           enabled ? "true" : "false");
     return HalResult<void>::unsupported();
 }
 
-HalResult<sp<Aidl::IPowerHintSession>> EmptyHalWrapper::createHintSession(
+HalResult<std::shared_ptr<Aidl::IPowerHintSession>> EmptyHalWrapper::createHintSession(
         int32_t, int32_t, const std::vector<int32_t>& threadIds, int64_t) {
     ALOGV("Skipped createHintSession(task num=%zu) because Power HAL not available",
           threadIds.size());
-    return HalResult<sp<Aidl::IPowerHintSession>>::unsupported();
+    return HalResult<std::shared_ptr<Aidl::IPowerHintSession>>::unsupported();
 }
 
 HalResult<int64_t> EmptyHalWrapper::getHintSessionPreferredRate() {
@@ -104,8 +67,8 @@
 
 // -------------------------------------------------------------------------------------------------
 
-HalResult<void> HidlHalWrapperV1_0::setBoost(Boost boost, int32_t durationMs) {
-    if (boost == Boost::INTERACTION) {
+HalResult<void> HidlHalWrapperV1_0::setBoost(Aidl::Boost boost, int32_t durationMs) {
+    if (boost == Aidl::Boost::INTERACTION) {
         return sendPowerHint(V1_3::PowerHint::INTERACTION, durationMs);
     } else {
         ALOGV("Skipped setBoost %s because Power HAL AIDL not available", toString(boost).c_str());
@@ -113,20 +76,20 @@
     }
 }
 
-HalResult<void> HidlHalWrapperV1_0::setMode(Mode mode, bool enabled) {
+HalResult<void> HidlHalWrapperV1_0::setMode(Aidl::Mode mode, bool enabled) {
     uint32_t data = enabled ? 1 : 0;
     switch (mode) {
-        case Mode::LAUNCH:
+        case Aidl::Mode::LAUNCH:
             return sendPowerHint(V1_3::PowerHint::LAUNCH, data);
-        case Mode::LOW_POWER:
+        case Aidl::Mode::LOW_POWER:
             return sendPowerHint(V1_3::PowerHint::LOW_POWER, data);
-        case Mode::SUSTAINED_PERFORMANCE:
+        case Aidl::Mode::SUSTAINED_PERFORMANCE:
             return sendPowerHint(V1_3::PowerHint::SUSTAINED_PERFORMANCE, data);
-        case Mode::VR:
+        case Aidl::Mode::VR:
             return sendPowerHint(V1_3::PowerHint::VR_MODE, data);
-        case Mode::INTERACTIVE:
+        case Aidl::Mode::INTERACTIVE:
             return setInteractive(enabled);
-        case Mode::DOUBLE_TAP_TO_WAKE:
+        case Aidl::Mode::DOUBLE_TAP_TO_WAKE:
             return setFeature(V1_0::Feature::POWER_FEATURE_DOUBLE_TAP_TO_WAKE, enabled);
         default:
             ALOGV("Skipped setMode %s because Power HAL AIDL not available",
@@ -150,11 +113,11 @@
     return HalResult<void>::fromReturn(ret);
 }
 
-HalResult<sp<hardware::power::IPowerHintSession>> HidlHalWrapperV1_0::createHintSession(
+HalResult<std::shared_ptr<Aidl::IPowerHintSession>> HidlHalWrapperV1_0::createHintSession(
         int32_t, int32_t, const std::vector<int32_t>& threadIds, int64_t) {
     ALOGV("Skipped createHintSession(task num=%zu) because Power HAL not available",
           threadIds.size());
-    return HalResult<sp<Aidl::IPowerHintSession>>::unsupported();
+    return HalResult<std::shared_ptr<Aidl::IPowerHintSession>>::unsupported();
 }
 
 HalResult<int64_t> HidlHalWrapperV1_0::getHintSessionPreferredRate() {
@@ -178,26 +141,26 @@
     return HalResult<void>::fromReturn(ret);
 }
 
-HalResult<void> HidlHalWrapperV1_2::setBoost(Boost boost, int32_t durationMs) {
+HalResult<void> HidlHalWrapperV1_2::setBoost(Aidl::Boost boost, int32_t durationMs) {
     switch (boost) {
-        case Boost::CAMERA_SHOT:
+        case Aidl::Boost::CAMERA_SHOT:
             return sendPowerHint(V1_3::PowerHint::CAMERA_SHOT, durationMs);
-        case Boost::CAMERA_LAUNCH:
+        case Aidl::Boost::CAMERA_LAUNCH:
             return sendPowerHint(V1_3::PowerHint::CAMERA_LAUNCH, durationMs);
         default:
             return HidlHalWrapperV1_1::setBoost(boost, durationMs);
     }
 }
 
-HalResult<void> HidlHalWrapperV1_2::setMode(Mode mode, bool enabled) {
+HalResult<void> HidlHalWrapperV1_2::setMode(Aidl::Mode mode, bool enabled) {
     uint32_t data = enabled ? 1 : 0;
     switch (mode) {
-        case Mode::CAMERA_STREAMING_SECURE:
-        case Mode::CAMERA_STREAMING_LOW:
-        case Mode::CAMERA_STREAMING_MID:
-        case Mode::CAMERA_STREAMING_HIGH:
+        case Aidl::Mode::CAMERA_STREAMING_SECURE:
+        case Aidl::Mode::CAMERA_STREAMING_LOW:
+        case Aidl::Mode::CAMERA_STREAMING_MID:
+        case Aidl::Mode::CAMERA_STREAMING_HIGH:
             return sendPowerHint(V1_3::PowerHint::CAMERA_STREAMING, data);
-        case Mode::AUDIO_STREAMING_LOW_LATENCY:
+        case Aidl::Mode::AUDIO_STREAMING_LOW_LATENCY:
             return sendPowerHint(V1_3::PowerHint::AUDIO_LOW_LATENCY, data);
         default:
             return HidlHalWrapperV1_1::setMode(mode, enabled);
@@ -206,9 +169,9 @@
 
 // -------------------------------------------------------------------------------------------------
 
-HalResult<void> HidlHalWrapperV1_3::setMode(Mode mode, bool enabled) {
+HalResult<void> HidlHalWrapperV1_3::setMode(Aidl::Mode mode, bool enabled) {
     uint32_t data = enabled ? 1 : 0;
-    if (mode == Mode::EXPENSIVE_RENDERING) {
+    if (mode == Aidl::Mode::EXPENSIVE_RENDERING) {
         return sendPowerHint(V1_3::PowerHint::EXPENSIVE_RENDERING, data);
     }
     return HidlHalWrapperV1_2::setMode(mode, enabled);
@@ -222,7 +185,7 @@
 
 // -------------------------------------------------------------------------------------------------
 
-HalResult<void> AidlHalWrapper::setBoost(Boost boost, int32_t durationMs) {
+HalResult<void> AidlHalWrapper::setBoost(Aidl::Boost boost, int32_t durationMs) {
     std::unique_lock<std::mutex> lock(mBoostMutex);
     size_t idx = static_cast<size_t>(boost);
 
@@ -237,7 +200,7 @@
         auto isSupportedRet = mHandle->isBoostSupported(boost, &isSupported);
         if (!isSupportedRet.isOk()) {
             ALOGE("Skipped setBoost %s because check support failed with: %s",
-                  toString(boost).c_str(), isSupportedRet.toString8().c_str());
+                  toString(boost).c_str(), isSupportedRet.getDescription().c_str());
             // return HalResult::FAILED;
             return HalResult<void>::fromStatus(isSupportedRet);
         }
@@ -254,7 +217,7 @@
     return toHalResult(mHandle->setBoost(boost, durationMs));
 }
 
-HalResult<void> AidlHalWrapper::setMode(Mode mode, bool enabled) {
+HalResult<void> AidlHalWrapper::setMode(Aidl::Mode mode, bool enabled) {
     std::unique_lock<std::mutex> lock(mModeMutex);
     size_t idx = static_cast<size_t>(mode);
 
@@ -268,7 +231,7 @@
         bool isSupported = false;
         auto isSupportedRet = mHandle->isModeSupported(mode, &isSupported);
         if (!isSupportedRet.isOk()) {
-            return HalResult<void>::failed(isSupportedRet.toString8().c_str());
+            return HalResult<void>::failed(isSupportedRet.getDescription());
         }
 
         mModeSupportedArray[idx] = isSupported ? HalSupport::ON : HalSupport::OFF;
@@ -283,10 +246,10 @@
     return toHalResult(mHandle->setMode(mode, enabled));
 }
 
-HalResult<sp<Aidl::IPowerHintSession>> AidlHalWrapper::createHintSession(
+HalResult<std::shared_ptr<Aidl::IPowerHintSession>> AidlHalWrapper::createHintSession(
         int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds, int64_t durationNanos) {
-    sp<IPowerHintSession> appSession;
-    return HalResult<sp<Aidl::IPowerHintSession>>::
+    std::shared_ptr<Aidl::IPowerHintSession> appSession;
+    return HalResult<std::shared_ptr<Aidl::IPowerHintSession>>::
             fromStatus(mHandle->createHintSession(tgid, uid, threadIds, durationNanos, &appSession),
                        appSession);
 }
diff --git a/services/powermanager/benchmarks/Android.bp b/services/powermanager/benchmarks/Android.bp
index 4343aec..03fc38d 100644
--- a/services/powermanager/benchmarks/Android.bp
+++ b/services/powermanager/benchmarks/Android.bp
@@ -32,6 +32,7 @@
     shared_libs: [
         "libbase",
         "libbinder",
+        "libbinder_ndk",
         "libhidlbase",
         "liblog",
         "libpowermanager",
@@ -40,7 +41,7 @@
         "android.hardware.power@1.1",
         "android.hardware.power@1.2",
         "android.hardware.power@1.3",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
     ],
     static_libs: [
         "libtestUtil",
diff --git a/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp b/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp
index 6e5e14d..759485f 100644
--- a/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp
+++ b/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp
@@ -16,21 +16,24 @@
 
 #define LOG_TAG "PowerHalAidlBenchmarks"
 
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/IPowerHintSession.h>
-#include <android/hardware/power/Mode.h>
-#include <android/hardware/power/WorkDuration.h>
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPowerHintSession.h>
+#include <aidl/android/hardware/power/Mode.h>
+#include <aidl/android/hardware/power/WorkDuration.h>
 #include <benchmark/benchmark.h>
 #include <binder/IServiceManager.h>
+#include <binder/Status.h>
+#include <powermanager/PowerHalLoader.h>
 #include <testUtil.h>
 #include <chrono>
 
-using android::hardware::power::Boost;
-using android::hardware::power::IPower;
-using android::hardware::power::IPowerHintSession;
-using android::hardware::power::Mode;
-using android::hardware::power::WorkDuration;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::IPower;
+using aidl::android::hardware::power::IPowerHintSession;
+using aidl::android::hardware::power::Mode;
+using aidl::android::hardware::power::WorkDuration;
+using android::power::PowerHalLoader;
 using std::chrono::microseconds;
 
 using namespace android;
@@ -63,15 +66,15 @@
 template <class R, class... Args0, class... Args1>
 static void runBenchmark(benchmark::State& state, microseconds delay, R (IPower::*fn)(Args0...),
                          Args1&&... args1) {
-    sp<IPower> hal = waitForVintfService<IPower>();
+    std::shared_ptr<IPower> hal = PowerHalLoader::loadAidl();
 
     if (hal == nullptr) {
         ALOGV("Power HAL not available, skipping test...");
         return;
     }
 
-    binder::Status ret = (*hal.*fn)(std::forward<Args1>(args1)...);
-    if (ret.exceptionCode() == binder::Status::Exception::EX_UNSUPPORTED_OPERATION) {
+    ndk::ScopedAStatus ret = (*hal.*fn)(std::forward<Args1>(args1)...);
+    if (ret.getExceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
         ALOGV("Power HAL does not support this operation, skipping test...");
         return;
     }
@@ -79,7 +82,7 @@
     while (state.KeepRunning()) {
         ret = (*hal.*fn)(std::forward<Args1>(args1)...);
         state.PauseTiming();
-        if (!ret.isOk()) state.SkipWithError(ret.toString8().c_str());
+        if (!ret.isOk()) state.SkipWithError(ret.getDescription().c_str());
         if (delay > 0us) {
             testDelaySpin(std::chrono::duration_cast<std::chrono::duration<float>>(delay).count());
         }
@@ -90,9 +93,9 @@
 template <class R, class... Args0, class... Args1>
 static void runSessionBenchmark(benchmark::State& state, R (IPowerHintSession::*fn)(Args0...),
                                 Args1&&... args1) {
-    sp<IPower> pwHal = waitForVintfService<IPower>();
+    std::shared_ptr<IPower> hal = PowerHalLoader::loadAidl();
 
-    if (pwHal == nullptr) {
+    if (hal == nullptr) {
         ALOGV("Power HAL not available, skipping test...");
         return;
     }
@@ -100,32 +103,32 @@
     // do not use tid from the benchmark process, use 1 for init
     std::vector<int32_t> threadIds{1};
     int64_t durationNanos = 16666666L;
-    sp<IPowerHintSession> hal;
+    std::shared_ptr<IPowerHintSession> session;
 
-    auto status = pwHal->createHintSession(1, 0, threadIds, durationNanos, &hal);
+    auto status = hal->createHintSession(1, 0, threadIds, durationNanos, &session);
 
-    if (hal == nullptr) {
+    if (session == nullptr) {
         ALOGV("Power HAL doesn't support session, skipping test...");
         return;
     }
 
-    binder::Status ret = (*hal.*fn)(std::forward<Args1>(args1)...);
-    if (ret.exceptionCode() == binder::Status::Exception::EX_UNSUPPORTED_OPERATION) {
+    ndk::ScopedAStatus ret = (*session.*fn)(std::forward<Args1>(args1)...);
+    if (ret.getExceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
         ALOGV("Power HAL does not support this operation, skipping test...");
         return;
     }
 
     while (state.KeepRunning()) {
-        ret = (*hal.*fn)(std::forward<Args1>(args1)...);
+        ret = (*session.*fn)(std::forward<Args1>(args1)...);
         state.PauseTiming();
-        if (!ret.isOk()) state.SkipWithError(ret.toString8().c_str());
+        if (!ret.isOk()) state.SkipWithError(ret.getDescription().c_str());
         if (ONEWAY_API_DELAY > 0us) {
             testDelaySpin(std::chrono::duration_cast<std::chrono::duration<float>>(ONEWAY_API_DELAY)
                                   .count());
         }
         state.ResumeTiming();
     }
-    hal->close();
+    session->close();
 }
 
 static void BM_PowerHalAidlBenchmarks_isBoostSupported(benchmark::State& state) {
@@ -155,16 +158,17 @@
     int64_t durationNanos = 16666666L;
     int32_t tgid = 999;
     int32_t uid = 1001;
-    sp<IPowerHintSession> appSession;
-    sp<IPower> hal = waitForVintfService<IPower>();
+    std::shared_ptr<IPowerHintSession> appSession;
+    std::shared_ptr<IPower> hal = PowerHalLoader::loadAidl();
 
     if (hal == nullptr) {
         ALOGV("Power HAL not available, skipping test...");
         return;
     }
 
-    binder::Status ret = hal->createHintSession(tgid, uid, threadIds, durationNanos, &appSession);
-    if (ret.exceptionCode() == binder::Status::Exception::EX_UNSUPPORTED_OPERATION) {
+    ndk::ScopedAStatus ret =
+            hal->createHintSession(tgid, uid, threadIds, durationNanos, &appSession);
+    if (ret.getExceptionCode() == binder::Status::EX_UNSUPPORTED_OPERATION) {
         ALOGV("Power HAL does not support this operation, skipping test...");
         return;
     }
@@ -172,7 +176,7 @@
     while (state.KeepRunning()) {
         ret = hal->createHintSession(tgid, uid, threadIds, durationNanos, &appSession);
         state.PauseTiming();
-        if (!ret.isOk()) state.SkipWithError(ret.toString8().c_str());
+        if (!ret.isOk()) state.SkipWithError(ret.getDescription().c_str());
         appSession->close();
         state.ResumeTiming();
     }
diff --git a/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp b/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp
index f8abc7a..effddda 100644
--- a/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp
+++ b/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp
@@ -16,15 +16,15 @@
 
 #define LOG_TAG "PowerHalControllerBenchmarks"
 
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/Mode.h>
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <benchmark/benchmark.h>
 #include <powermanager/PowerHalController.h>
 #include <testUtil.h>
 #include <chrono>
 
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::Mode;
 using android::power::HalResult;
 using android::power::PowerHalController;
 
diff --git a/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp b/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp
index 167f3a6..111b5d7 100644
--- a/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp
+++ b/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp
@@ -16,10 +16,10 @@
 
 #define LOG_TAG "PowerHalHidlBenchmarks"
 
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <android/hardware/power/1.1/IPower.h>
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/Mode.h>
 #include <benchmark/benchmark.h>
 #include <hardware/power.h>
 #include <hardware_legacy/power.h>
@@ -27,8 +27,6 @@
 #include <chrono>
 
 using android::hardware::Return;
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
 using android::hardware::power::V1_0::Feature;
 using android::hardware::power::V1_0::PowerHint;
 using std::chrono::microseconds;
diff --git a/services/powermanager/tests/Android.bp b/services/powermanager/tests/Android.bp
index 54dffcf..08fcdc8 100644
--- a/services/powermanager/tests/Android.bp
+++ b/services/powermanager/tests/Android.bp
@@ -43,6 +43,7 @@
     shared_libs: [
         "libbase",
         "libbinder",
+        "libbinder_ndk",
         "libhidlbase",
         "liblog",
         "libpowermanager",
@@ -51,9 +52,10 @@
         "android.hardware.power@1.1",
         "android.hardware.power@1.2",
         "android.hardware.power@1.3",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
     ],
     static_libs: [
         "libgmock",
     ],
+    require_root: true,
 }
diff --git a/services/powermanager/tests/PowerHalControllerTest.cpp b/services/powermanager/tests/PowerHalControllerTest.cpp
index 6cc7a6f..01270ce 100644
--- a/services/powermanager/tests/PowerHalControllerTest.cpp
+++ b/services/powermanager/tests/PowerHalControllerTest.cpp
@@ -16,9 +16,9 @@
 
 #define LOG_TAG "PowerHalControllerTest"
 
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/Mode.h>
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <powermanager/PowerHalController.h>
@@ -26,8 +26,8 @@
 
 #include <thread>
 
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::Mode;
 using android::hardware::power::V1_0::Feature;
 using android::hardware::power::V1_0::IPower;
 using android::hardware::power::V1_0::PowerHint;
diff --git a/services/powermanager/tests/PowerHalLoaderTest.cpp b/services/powermanager/tests/PowerHalLoaderTest.cpp
index e36deed..7d97354 100644
--- a/services/powermanager/tests/PowerHalLoaderTest.cpp
+++ b/services/powermanager/tests/PowerHalLoaderTest.cpp
@@ -16,9 +16,8 @@
 
 #define LOG_TAG "PowerHalLoaderTest"
 
-#include <android-base/logging.h>
+#include <aidl/android/hardware/power/IPower.h>
 #include <android/hardware/power/1.1/IPower.h>
-#include <android/hardware/power/IPower.h>
 #include <gtest/gtest.h>
 #include <powermanager/PowerHalLoader.h>
 
@@ -28,7 +27,7 @@
 using IPowerV1_1 = android::hardware::power::V1_1::IPower;
 using IPowerV1_2 = android::hardware::power::V1_2::IPower;
 using IPowerV1_3 = android::hardware::power::V1_3::IPower;
-using IPowerAidl = android::hardware::power::IPower;
+using IPowerAidl = aidl::android::hardware::power::IPower;
 
 using namespace android;
 using namespace android::power;
@@ -37,30 +36,30 @@
 // -------------------------------------------------------------------------------------------------
 
 template <typename T>
-sp<T> loadHal();
+T loadHal();
 
 template <>
-sp<IPowerAidl> loadHal<IPowerAidl>() {
+std::shared_ptr<IPowerAidl> loadHal<std::shared_ptr<IPowerAidl>>() {
     return PowerHalLoader::loadAidl();
 }
 
 template <>
-sp<IPowerV1_0> loadHal<IPowerV1_0>() {
+sp<IPowerV1_0> loadHal<sp<IPowerV1_0>>() {
     return PowerHalLoader::loadHidlV1_0();
 }
 
 template <>
-sp<IPowerV1_1> loadHal<IPowerV1_1>() {
+sp<IPowerV1_1> loadHal<sp<IPowerV1_1>>() {
     return PowerHalLoader::loadHidlV1_1();
 }
 
 template <>
-sp<IPowerV1_2> loadHal<IPowerV1_2>() {
+sp<IPowerV1_2> loadHal<sp<IPowerV1_2>>() {
     return PowerHalLoader::loadHidlV1_2();
 }
 
 template <>
-sp<IPowerV1_3> loadHal<IPowerV1_3>() {
+sp<IPowerV1_3> loadHal<sp<IPowerV1_3>>() {
     return PowerHalLoader::loadHidlV1_3();
 }
 
@@ -69,46 +68,47 @@
 template <typename T>
 class PowerHalLoaderTest : public Test {
 public:
-    sp<T> load() { return ::loadHal<T>(); }
+    T load() { return ::loadHal<T>(); }
     void unload() { PowerHalLoader::unloadAll(); }
 };
 
 // -------------------------------------------------------------------------------------------------
-
-typedef ::testing::Types<IPowerAidl, IPowerV1_0, IPowerV1_1, IPowerV1_2, IPowerV1_3> PowerHalTypes;
+typedef ::testing::Types<std::shared_ptr<IPowerAidl>, sp<IPowerV1_0>, sp<IPowerV1_1>,
+                         sp<IPowerV1_2>, sp<IPowerV1_3>>
+        PowerHalTypes;
 TYPED_TEST_SUITE(PowerHalLoaderTest, PowerHalTypes);
 
 TYPED_TEST(PowerHalLoaderTest, TestLoadsOnlyOnce) {
-    sp<TypeParam> firstHal = this->load();
+    TypeParam firstHal = this->load();
     if (firstHal == nullptr) {
         ALOGE("Power HAL not available. Skipping test.");
         return;
     }
-    sp<TypeParam> secondHal = this->load();
+    TypeParam secondHal = this->load();
     ASSERT_EQ(firstHal, secondHal);
 }
 
 TYPED_TEST(PowerHalLoaderTest, TestUnload) {
-    sp<TypeParam> firstHal = this->load();
+    TypeParam firstHal = this->load();
     if (firstHal == nullptr) {
         ALOGE("Power HAL not available. Skipping test.");
         return;
     }
     this->unload();
-    sp<TypeParam> secondHal = this->load();
+    TypeParam secondHal = this->load();
     ASSERT_NE(secondHal, nullptr);
     ASSERT_NE(firstHal, secondHal);
 }
 
 TYPED_TEST(PowerHalLoaderTest, TestLoadMultiThreadLoadsOnlyOnce) {
-    std::vector<std::future<sp<TypeParam>>> futures;
+    std::vector<std::future<TypeParam>> futures;
     for (int i = 0; i < 10; i++) {
         futures.push_back(
                 std::async(std::launch::async, &PowerHalLoaderTest<TypeParam>::load, this));
     }
 
     futures[0].wait();
-    sp<TypeParam> firstHal = futures[0].get();
+    TypeParam firstHal = futures[0].get();
     if (firstHal == nullptr) {
         ALOGE("Power HAL not available. Skipping test.");
         return;
@@ -116,7 +116,7 @@
 
     for (int i = 1; i < 10; i++) {
         futures[i].wait();
-        sp<TypeParam> currentHal = futures[i].get();
+        TypeParam currentHal = futures[i].get();
         ASSERT_EQ(firstHal, currentHal);
     }
 }
diff --git a/services/powermanager/tests/PowerHalWrapperAidlTest.cpp b/services/powermanager/tests/PowerHalWrapperAidlTest.cpp
index cb1a77a..641ba9f 100644
--- a/services/powermanager/tests/PowerHalWrapperAidlTest.cpp
+++ b/services/powermanager/tests/PowerHalWrapperAidlTest.cpp
@@ -16,9 +16,9 @@
 
 #define LOG_TAG "PowerHalWrapperAidlTest"
 
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPowerHintSession.h>
-#include <android/hardware/power/Mode.h>
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPowerHintSession.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <binder/IServiceManager.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
@@ -28,11 +28,11 @@
 #include <unistd.h>
 #include <thread>
 
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::IPower;
+using aidl::android::hardware::power::IPowerHintSession;
+using aidl::android::hardware::power::Mode;
 using android::binder::Status;
-using android::hardware::power::Boost;
-using android::hardware::power::IPower;
-using android::hardware::power::IPowerHintSession;
-using android::hardware::power::Mode;
 
 using namespace android;
 using namespace android::power;
@@ -43,18 +43,21 @@
 
 class MockIPower : public IPower {
 public:
-    MOCK_METHOD(Status, isBoostSupported, (Boost boost, bool* ret), (override));
-    MOCK_METHOD(Status, setBoost, (Boost boost, int32_t durationMs), (override));
-    MOCK_METHOD(Status, isModeSupported, (Mode mode, bool* ret), (override));
-    MOCK_METHOD(Status, setMode, (Mode mode, bool enabled), (override));
-    MOCK_METHOD(Status, createHintSession,
+    MockIPower() = default;
+
+    MOCK_METHOD(ndk::ScopedAStatus, isBoostSupported, (Boost boost, bool* ret), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, setBoost, (Boost boost, int32_t durationMs), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, isModeSupported, (Mode mode, bool* ret), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, setMode, (Mode mode, bool enabled), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, createHintSession,
                 (int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
-                 int64_t durationNanos, sp<IPowerHintSession>* session),
+                 int64_t durationNanos, std::shared_ptr<IPowerHintSession>* session),
                 (override));
-    MOCK_METHOD(Status, getHintSessionPreferredRate, (int64_t * rate), (override));
-    MOCK_METHOD(int32_t, getInterfaceVersion, (), (override));
-    MOCK_METHOD(std::string, getInterfaceHash, (), (override));
-    MOCK_METHOD(IBinder*, onAsBinder, (), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getHintSessionPreferredRate, (int64_t * rate), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getInterfaceVersion, (int32_t * version), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getInterfaceHash, (std::string * hash), (override));
+    MOCK_METHOD(ndk::SpAIBinder, asBinder, (), (override));
+    MOCK_METHOD(bool, isRemote, (), (override));
 };
 
 // -------------------------------------------------------------------------------------------------
@@ -65,13 +68,13 @@
 
 protected:
     std::unique_ptr<HalWrapper> mWrapper = nullptr;
-    sp<StrictMock<MockIPower>> mMockHal = nullptr;
+    std::shared_ptr<StrictMock<MockIPower>> mMockHal = nullptr;
 };
 
 // -------------------------------------------------------------------------------------------------
 
 void PowerHalWrapperAidlTest::SetUp() {
-    mMockHal = new StrictMock<MockIPower>();
+    mMockHal = ndk::SharedRefBase::make<StrictMock<MockIPower>>();
     mWrapper = std::make_unique<AidlHalWrapper>(mMockHal);
     ASSERT_NE(nullptr, mWrapper);
 }
@@ -83,9 +86,11 @@
         InSequence seq;
         EXPECT_CALL(*mMockHal.get(), isBoostSupported(Eq(Boost::DISPLAY_UPDATE_IMMINENT), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(DoAll(SetArgPointee<1>(true), Return(Status())));
+                .WillOnce(DoAll(SetArgPointee<1>(true),
+                                Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
         EXPECT_CALL(*mMockHal.get(), setBoost(Eq(Boost::DISPLAY_UPDATE_IMMINENT), Eq(100)))
-                .Times(Exactly(1));
+                .Times(Exactly(1))
+                .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
     }
 
     auto result = mWrapper->setBoost(Boost::DISPLAY_UPDATE_IMMINENT, 100);
@@ -97,13 +102,14 @@
         InSequence seq;
         EXPECT_CALL(*mMockHal.get(), isBoostSupported(Eq(Boost::INTERACTION), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(DoAll(SetArgPointee<1>(true), Return(Status())));
+                .WillOnce(DoAll(SetArgPointee<1>(true),
+                                Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
         EXPECT_CALL(*mMockHal.get(), setBoost(Eq(Boost::INTERACTION), Eq(100)))
                 .Times(Exactly(1))
-                .WillRepeatedly(Return(Status::fromExceptionCode(-1)));
+                .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::fromExceptionCode(-1))));
         EXPECT_CALL(*mMockHal.get(), isBoostSupported(Eq(Boost::DISPLAY_UPDATE_IMMINENT), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(Return(Status::fromExceptionCode(-1)));
+                .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::fromExceptionCode(-1))));
     }
 
     auto result = mWrapper->setBoost(Boost::INTERACTION, 100);
@@ -115,7 +121,8 @@
 TEST_F(PowerHalWrapperAidlTest, TestSetBoostUnsupported) {
     EXPECT_CALL(*mMockHal.get(), isBoostSupported(Eq(Boost::INTERACTION), _))
             .Times(Exactly(1))
-            .WillRepeatedly(DoAll(SetArgPointee<1>(false), Return(Status())));
+            .WillOnce(DoAll(SetArgPointee<1>(false),
+                            Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
 
     auto result = mWrapper->setBoost(Boost::INTERACTION, 1000);
     ASSERT_TRUE(result.isUnsupported());
@@ -128,8 +135,13 @@
         InSequence seq;
         EXPECT_CALL(*mMockHal.get(), isBoostSupported(Eq(Boost::INTERACTION), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(DoAll(SetArgPointee<1>(true), Return(Status())));
-        EXPECT_CALL(*mMockHal.get(), setBoost(Eq(Boost::INTERACTION), Eq(100))).Times(Exactly(10));
+                .WillOnce(DoAll(SetArgPointee<1>(true),
+                                Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
+        auto& exp = EXPECT_CALL(*mMockHal.get(), setBoost(Eq(Boost::INTERACTION), Eq(100)))
+                            .Times(Exactly(10));
+        for (int i = 0; i < 10; i++) {
+            exp.WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
+        }
     }
 
     std::vector<std::thread> threads;
@@ -147,9 +159,11 @@
         InSequence seq;
         EXPECT_CALL(*mMockHal.get(), isModeSupported(Eq(Mode::DISPLAY_INACTIVE), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(DoAll(SetArgPointee<1>(true), Return(Status())));
+                .WillOnce(DoAll(SetArgPointee<1>(true),
+                                Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
         EXPECT_CALL(*mMockHal.get(), setMode(Eq(Mode::DISPLAY_INACTIVE), Eq(false)))
-                .Times(Exactly(1));
+                .Times(Exactly(1))
+                .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
     }
 
     auto result = mWrapper->setMode(Mode::DISPLAY_INACTIVE, false);
@@ -161,13 +175,14 @@
         InSequence seq;
         EXPECT_CALL(*mMockHal.get(), isModeSupported(Eq(Mode::LAUNCH), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(DoAll(SetArgPointee<1>(true), Return(Status())));
+                .WillOnce(DoAll(SetArgPointee<1>(true),
+                                Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
         EXPECT_CALL(*mMockHal.get(), setMode(Eq(Mode::LAUNCH), Eq(true)))
                 .Times(Exactly(1))
-                .WillRepeatedly(Return(Status::fromExceptionCode(-1)));
+                .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::fromExceptionCode(-1))));
         EXPECT_CALL(*mMockHal.get(), isModeSupported(Eq(Mode::DISPLAY_INACTIVE), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(Return(Status::fromExceptionCode(-1)));
+                .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::fromExceptionCode(-1))));
     }
 
     auto result = mWrapper->setMode(Mode::LAUNCH, true);
@@ -179,14 +194,16 @@
 TEST_F(PowerHalWrapperAidlTest, TestSetModeUnsupported) {
     EXPECT_CALL(*mMockHal.get(), isModeSupported(Eq(Mode::LAUNCH), _))
             .Times(Exactly(1))
-            .WillRepeatedly(DoAll(SetArgPointee<1>(false), Return(Status())));
+            .WillOnce(DoAll(SetArgPointee<1>(false),
+                            Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
 
     auto result = mWrapper->setMode(Mode::LAUNCH, true);
     ASSERT_TRUE(result.isUnsupported());
 
     EXPECT_CALL(*mMockHal.get(), isModeSupported(Eq(Mode::CAMERA_STREAMING_HIGH), _))
             .Times(Exactly(1))
-            .WillRepeatedly(DoAll(SetArgPointee<1>(false), Return(Status())));
+            .WillOnce(DoAll(SetArgPointee<1>(false),
+                            Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
     result = mWrapper->setMode(Mode::CAMERA_STREAMING_HIGH, true);
     ASSERT_TRUE(result.isUnsupported());
 }
@@ -196,8 +213,13 @@
         InSequence seq;
         EXPECT_CALL(*mMockHal.get(), isModeSupported(Eq(Mode::LAUNCH), _))
                 .Times(Exactly(1))
-                .WillRepeatedly(DoAll(SetArgPointee<1>(true), Return(Status())));
-        EXPECT_CALL(*mMockHal.get(), setMode(Eq(Mode::LAUNCH), Eq(false))).Times(Exactly(10));
+                .WillOnce(DoAll(SetArgPointee<1>(true),
+                                Return(testing::ByMove(ndk::ScopedAStatus::ok()))));
+        auto& exp = EXPECT_CALL(*mMockHal.get(), setMode(Eq(Mode::LAUNCH), Eq(false)))
+                            .Times(Exactly(10));
+        for (int i = 0; i < 10; i++) {
+            exp.WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
+        }
     }
 
     std::vector<std::thread> threads;
@@ -217,7 +239,8 @@
     int64_t durationNanos = 16666666L;
     EXPECT_CALL(*mMockHal.get(),
                 createHintSession(Eq(tgid), Eq(uid), Eq(threadIds), Eq(durationNanos), _))
-            .Times(Exactly(1));
+            .Times(Exactly(1))
+            .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
     auto result = mWrapper->createHintSession(tgid, uid, threadIds, durationNanos);
     ASSERT_TRUE(result.isOk());
 }
@@ -230,13 +253,16 @@
     EXPECT_CALL(*mMockHal.get(),
                 createHintSession(Eq(tgid), Eq(uid), Eq(threadIds), Eq(durationNanos), _))
             .Times(Exactly(1))
-            .WillRepeatedly(Return(Status::fromExceptionCode(Status::EX_ILLEGAL_ARGUMENT)));
+            .WillOnce(Return(testing::ByMove(
+                    ndk::ScopedAStatus::fromExceptionCode(Status::EX_ILLEGAL_ARGUMENT))));
     auto result = mWrapper->createHintSession(tgid, uid, threadIds, durationNanos);
     ASSERT_TRUE(result.isFailed());
 }
 
 TEST_F(PowerHalWrapperAidlTest, TestGetHintSessionPreferredRate) {
-    EXPECT_CALL(*mMockHal.get(), getHintSessionPreferredRate(_)).Times(Exactly(1));
+    EXPECT_CALL(*mMockHal.get(), getHintSessionPreferredRate(_))
+            .Times(Exactly(1))
+            .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
     auto result = mWrapper->getHintSessionPreferredRate();
     ASSERT_TRUE(result.isOk());
     int64_t rate = result.value();
diff --git a/services/powermanager/tests/PowerHalWrapperHidlV1_0Test.cpp b/services/powermanager/tests/PowerHalWrapperHidlV1_0Test.cpp
index 0cd2e22..461143b 100644
--- a/services/powermanager/tests/PowerHalWrapperHidlV1_0Test.cpp
+++ b/services/powermanager/tests/PowerHalWrapperHidlV1_0Test.cpp
@@ -16,17 +16,17 @@
 
 #define LOG_TAG "PowerHalWrapperHidlV1_0Test"
 
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/Mode.h>
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <binder/IServiceManager.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <powermanager/PowerHalWrapper.h>
 #include <utils/Log.h>
 
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::Mode;
 using android::hardware::power::V1_0::Feature;
 using android::hardware::power::V1_0::IPower;
 using android::hardware::power::V1_0::PowerHint;
diff --git a/services/powermanager/tests/PowerHalWrapperHidlV1_1Test.cpp b/services/powermanager/tests/PowerHalWrapperHidlV1_1Test.cpp
index 32f84e2..79dd996 100644
--- a/services/powermanager/tests/PowerHalWrapperHidlV1_1Test.cpp
+++ b/services/powermanager/tests/PowerHalWrapperHidlV1_1Test.cpp
@@ -16,18 +16,18 @@
 
 #define LOG_TAG "PowerHalWrapperHidlV1_1Test"
 
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <android/hardware/power/1.1/IPower.h>
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/Mode.h>
 #include <binder/IServiceManager.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <powermanager/PowerHalWrapper.h>
 #include <utils/Log.h>
 
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::Mode;
 using android::hardware::power::V1_0::Feature;
 using android::hardware::power::V1_0::PowerHint;
 using IPowerV1_1 = android::hardware::power::V1_1::IPower;
diff --git a/services/powermanager/tests/PowerHalWrapperHidlV1_2Test.cpp b/services/powermanager/tests/PowerHalWrapperHidlV1_2Test.cpp
index cf48409..aa6d6c7 100644
--- a/services/powermanager/tests/PowerHalWrapperHidlV1_2Test.cpp
+++ b/services/powermanager/tests/PowerHalWrapperHidlV1_2Test.cpp
@@ -16,18 +16,18 @@
 
 #define LOG_TAG "PowerHalWrapperHidlV1_2Test"
 
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <android/hardware/power/1.2/IPower.h>
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/Mode.h>
 #include <binder/IServiceManager.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <powermanager/PowerHalWrapper.h>
 #include <utils/Log.h>
 
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::Mode;
 using android::hardware::power::V1_0::Feature;
 using PowerHintV1_0 = android::hardware::power::V1_0::PowerHint;
 using PowerHintV1_2 = android::hardware::power::V1_2::PowerHint;
diff --git a/services/powermanager/tests/PowerHalWrapperHidlV1_3Test.cpp b/services/powermanager/tests/PowerHalWrapperHidlV1_3Test.cpp
index 2c48537..a995afd 100644
--- a/services/powermanager/tests/PowerHalWrapperHidlV1_3Test.cpp
+++ b/services/powermanager/tests/PowerHalWrapperHidlV1_3Test.cpp
@@ -16,18 +16,18 @@
 
 #define LOG_TAG "PowerHalWrapperHidlV1_3Test"
 
+#include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/Mode.h>
 #include <android/hardware/power/1.3/IPower.h>
-#include <android/hardware/power/Boost.h>
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/Mode.h>
 #include <binder/IServiceManager.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <powermanager/PowerHalWrapper.h>
 #include <utils/Log.h>
 
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::Mode;
 using android::hardware::power::V1_0::Feature;
 using PowerHintV1_0 = android::hardware::power::V1_0::PowerHint;
 using PowerHintV1_2 = android::hardware::power::V1_2::PowerHint;
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index 5683a92..89c80bc 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -27,6 +27,7 @@
     defaults: [
         "android.hardware.graphics.composer3-ndk_shared",
         "librenderengine_deps",
+        "libtimestats_deps",
         "surfaceflinger_defaults",
     ],
     cflags: [
@@ -47,7 +48,7 @@
         "android.hardware.graphics.composer@2.2",
         "android.hardware.graphics.composer@2.3",
         "android.hardware.graphics.composer@2.4",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
         "libbase",
         "libbinder",
         "libbinder_ndk",
@@ -58,14 +59,12 @@
         "libGLESv2",
         "libgui",
         "libhidlbase",
-        "liblayers_proto",
         "liblog",
         "libnativewindow",
         "libpowermanager",
         "libprocessgroup",
         "libprotobuf-cpp-lite",
         "libsync",
-        "libtimestats",
         "libui",
         "libinput",
         "libutils",
@@ -77,11 +76,13 @@
         "libcompositionengine",
         "libframetimeline",
         "libgui_aidl_static",
+        "liblayers_proto",
         "libperfetto_client_experimental",
         "librenderengine",
         "libscheduler",
         "libserviceutils",
         "libshaders",
+        "libtimestats",
         "libtonemap",
     ],
     header_libs: [
@@ -95,6 +96,7 @@
         "libcompositionengine",
         "librenderengine",
         "libserviceutils",
+        "libtimestats",
     ],
     export_shared_lib_headers: [
         "android.hardware.graphics.allocator@2.0",
@@ -106,7 +108,6 @@
         "android.hardware.graphics.composer@2.4",
         "libpowermanager",
         "libhidlbase",
-        "libtimestats",
     ],
     // TODO (marissaw): this library is not used by surfaceflinger. This is here so
     // the library compiled in a way that is accessible to system partition when running
@@ -213,14 +214,12 @@
         "-DLOG_TAG=\"SurfaceFlinger\"",
     ],
     shared_libs: [
-        "android.frameworks.displayservice@1.0",
         "android.hardware.configstore-utils",
         "android.hardware.configstore@1.0",
         "android.hardware.graphics.allocator@2.0",
         "android.hardware.graphics.allocator@3.0",
         "libbinder",
         "libcutils",
-        "libdisplayservicehidl",
         "libhidlbase",
         "liblog",
         "libprocessgroup",
@@ -228,6 +227,8 @@
         "libutils",
     ],
     static_libs: [
+        "android.frameworks.displayservice@1.0",
+        "libdisplayservicehidl",
         "libserviceutils",
     ],
 }
diff --git a/services/surfaceflinger/CompositionEngine/Android.bp b/services/surfaceflinger/CompositionEngine/Android.bp
index f3a0186..3426495 100644
--- a/services/surfaceflinger/CompositionEngine/Android.bp
+++ b/services/surfaceflinger/CompositionEngine/Android.bp
@@ -12,6 +12,7 @@
     defaults: [
         "android.hardware.graphics.composer3-ndk_shared",
         "librenderengine_deps",
+        "libtimestats_deps",
         "surfaceflinger_defaults",
     ],
     cflags: [
@@ -26,22 +27,22 @@
         "android.hardware.graphics.composer@2.4",
         "android.hardware.power@1.0",
         "android.hardware.power@1.3",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
         "libbase",
         "libcutils",
         "libgui",
-        "liblayers_proto",
         "liblog",
         "libnativewindow",
         "libprotobuf-cpp-lite",
         "libSurfaceFlingerProp",
-        "libtimestats",
         "libui",
         "libutils",
     ],
     static_libs: [
+        "liblayers_proto",
         "libmath",
         "librenderengine",
+        "libtimestats",
         "libtonemap",
         "libaidlcommonsupport",
         "libprocessgroup",
diff --git a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
index f7049b9..c0eb36d 100644
--- a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
@@ -20,6 +20,7 @@
 
 #include "AidlComposerHal.h"
 
+#include <SurfaceFlingerProperties.h>
 #include <android-base/file.h>
 #include <android/binder_ibinder_platform.h>
 #include <android/binder_manager.h>
@@ -249,15 +250,18 @@
         ALOGE("getInterfaceVersion for AidlComposer constructor failed %s",
               status.getDescription().c_str());
     }
-    if (version == 1) {
-        mClearSlotBuffer = sp<GraphicBuffer>::make(1, 1, PIXEL_FORMAT_RGBX_8888,
-                                                   GraphicBuffer::USAGE_HW_COMPOSER |
-                                                           GraphicBuffer::USAGE_SW_READ_OFTEN |
-                                                           GraphicBuffer::USAGE_SW_WRITE_OFTEN,
-                                                   "AidlComposer");
-        if (!mClearSlotBuffer || mClearSlotBuffer->initCheck() != ::android::OK) {
-            LOG_ALWAYS_FATAL("Failed to allocate a buffer for clearing layer buffer slots");
-            return;
+    mSupportsBufferSlotsToClear = version > 1;
+    if (!mSupportsBufferSlotsToClear) {
+        if (sysprop::clear_slots_with_set_layer_buffer(false)) {
+            mClearSlotBuffer = sp<GraphicBuffer>::make(1, 1, PIXEL_FORMAT_RGBX_8888,
+                                                       GraphicBuffer::USAGE_HW_COMPOSER |
+                                                               GraphicBuffer::USAGE_SW_READ_OFTEN |
+                                                               GraphicBuffer::USAGE_SW_WRITE_OFTEN,
+                                                       "AidlComposer");
+            if (!mClearSlotBuffer || mClearSlotBuffer->initCheck() != ::android::OK) {
+                LOG_ALWAYS_FATAL("Failed to allocate a buffer for clearing layer buffer slots");
+                return;
+            }
         }
     }
 
@@ -844,12 +848,12 @@
     Error error = Error::NONE;
     mMutex.lock_shared();
     if (auto writer = getWriter(display)) {
-        // Backwards compatible way of clearing buffer is to set the layer buffer with a placeholder
-        // buffer, using the slot that needs to cleared... tricky.
-        if (mClearSlotBuffer == nullptr) {
+        if (mSupportsBufferSlotsToClear) {
             writer->get().setLayerBufferSlotsToClear(translate<int64_t>(display),
                                                      translate<int64_t>(layer), slotsToClear);
-        } else {
+            // Backwards compatible way of clearing buffer slots is to set the layer buffer with a
+            // placeholder buffer, using the slot that needs to cleared... tricky.
+        } else if (mClearSlotBuffer != nullptr) {
             for (uint32_t slot : slotsToClear) {
                 // Don't clear the active buffer slot because we need to restore the active buffer
                 // after clearing the requested buffer slots with a placeholder buffer.
diff --git a/services/surfaceflinger/DisplayHardware/AidlComposerHal.h b/services/surfaceflinger/DisplayHardware/AidlComposerHal.h
index ded91be..8d21b49 100644
--- a/services/surfaceflinger/DisplayHardware/AidlComposerHal.h
+++ b/services/surfaceflinger/DisplayHardware/AidlComposerHal.h
@@ -285,6 +285,8 @@
     // threading annotations.
     ftl::SharedMutex mMutex;
 
+    // Whether or not explicitly clearing buffer slots is supported.
+    bool mSupportsBufferSlotsToClear;
     // Buffer slots for layers are cleared by setting the slot buffer to this buffer.
     sp<GraphicBuffer> mClearSlotBuffer;
 
diff --git a/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp b/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
index e0f6c45..9b41da5 100644
--- a/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
@@ -24,12 +24,14 @@
 
 #include "HidlComposerHal.h"
 
+#include <SurfaceFlingerProperties.h>
 #include <android/binder_manager.h>
 #include <composer-command-buffer/2.2/ComposerCommandBuffer.h>
 #include <hidl/HidlTransportSupport.h>
 #include <hidl/HidlTransportUtils.h>
 #include <log/log.h>
 #include <utils/Trace.h>
+
 #include "HWC2.h"
 #include "Hal.h"
 
@@ -189,6 +191,9 @@
 }
 
 sp<GraphicBuffer> allocateClearSlotBuffer() {
+    if (!sysprop::clear_slots_with_set_layer_buffer(false)) {
+        return nullptr;
+    }
     sp<GraphicBuffer> buffer = sp<GraphicBuffer>::make(1, 1, PIXEL_FORMAT_RGBX_8888,
                                                        GraphicBuffer::USAGE_HW_COMPOSER |
                                                                GraphicBuffer::USAGE_SW_READ_OFTEN |
@@ -246,7 +251,7 @@
         LOG_ALWAYS_FATAL("failed to create composer client");
     }
 
-    if (!mClearSlotBuffer) {
+    if (!mClearSlotBuffer && sysprop::clear_slots_with_set_layer_buffer(false)) {
         LOG_ALWAYS_FATAL("Failed to allocate a buffer for clearing layer buffer slots");
         return;
     }
@@ -716,7 +721,11 @@
     if (slotsToClear.empty()) {
         return Error::NONE;
     }
-    // Backwards compatible way of clearing buffer is to set the layer buffer with a placeholder
+    // This can be null when the HAL hasn't explicitly enabled this feature.
+    if (mClearSlotBuffer == nullptr) {
+        return Error::NONE;
+    }
+    //  Backwards compatible way of clearing buffer is to set the layer buffer with a placeholder
     // buffer, using the slot that needs to cleared... tricky.
     for (uint32_t slot : slotsToClear) {
         // Don't clear the active buffer slot because we need to restore the active buffer after
diff --git a/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp b/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
index 9c7576e..f00ef67 100644
--- a/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
+++ b/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
@@ -31,9 +31,9 @@
 #include <utils/Mutex.h>
 #include <utils/Trace.h>
 
-#include <android/hardware/power/IPower.h>
-#include <android/hardware/power/IPowerHintSession.h>
-#include <android/hardware/power/WorkDuration.h>
+#include <aidl/android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPowerHintSession.h>
+#include <aidl/android/hardware/power/WorkDuration.h>
 
 #include <binder/IServiceManager.h>
 
@@ -49,11 +49,11 @@
 
 namespace impl {
 
-using android::hardware::power::Boost;
-using android::hardware::power::IPowerHintSession;
-using android::hardware::power::Mode;
-using android::hardware::power::SessionHint;
-using android::hardware::power::WorkDuration;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::IPowerHintSession;
+using aidl::android::hardware::power::Mode;
+using aidl::android::hardware::power::SessionHint;
+using aidl::android::hardware::power::WorkDuration;
 
 PowerAdvisor::~PowerAdvisor() = default;
 
@@ -230,7 +230,7 @@
             auto ret = mHintSession->updateTargetWorkDuration(targetDuration.ns());
             if (!ret.isOk()) {
                 ALOGW("Failed to set power hint target work duration with error: %s",
-                      ret.exceptionMessage().c_str());
+                      ret.getDescription().c_str());
                 mHintSessionRunning = false;
             }
         }
@@ -274,7 +274,7 @@
         auto ret = mHintSession->reportActualWorkDuration(mHintSessionQueue);
         if (!ret.isOk()) {
             ALOGW("Failed to report actual work durations with error: %s",
-                  ret.exceptionMessage().c_str());
+                  ret.getDescription().c_str());
             mHintSessionRunning = false;
             return;
         }
diff --git a/services/surfaceflinger/DisplayHardware/PowerAdvisor.h b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
index cfaa135..05e4c8b 100644
--- a/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
+++ b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
@@ -25,7 +25,7 @@
 #include <ui/FenceTime.h>
 #include <utils/Mutex.h>
 
-#include <android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPower.h>
 #include <compositionengine/impl/OutputCompositionState.h>
 #include <powermanager/PowerHalController.h>
 #include <scheduler/Time.h>
@@ -247,13 +247,14 @@
     bool mHintSessionRunning = false;
 
     std::mutex mHintSessionMutex;
-    sp<hardware::power::IPowerHintSession> mHintSession GUARDED_BY(mHintSessionMutex) = nullptr;
+    std::shared_ptr<aidl::android::hardware::power::IPowerHintSession> mHintSession
+            GUARDED_BY(mHintSessionMutex) = nullptr;
 
     // Initialize to true so we try to call, to check if it's supported
     bool mHasExpensiveRendering = true;
     bool mHasDisplayUpdateImminent = true;
     // Queue of actual durations saved to report
-    std::vector<hardware::power::WorkDuration> mHintSessionQueue;
+    std::vector<aidl::android::hardware::power::WorkDuration> mHintSessionQueue;
     // The latest values we have received for target and actual
     Duration mTargetDuration = kDefaultTargetDuration;
     std::optional<Duration> mActualDuration;
diff --git a/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp b/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp
index ded734e..dcc29b9 100644
--- a/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp
+++ b/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp
@@ -140,6 +140,10 @@
         janks.emplace_back("SurfaceFlinger Stuffing");
         jankType &= ~JankType::SurfaceFlingerStuffing;
     }
+    if (jankType & JankType::Dropped) {
+        janks.emplace_back("Dropped Frame");
+        jankType &= ~JankType::Dropped;
+    }
 
     // jankType should be 0 if all types of jank were checked for.
     LOG_ALWAYS_FATAL_IF(jankType != 0, "Unrecognized jank type value 0x%x", jankType);
@@ -264,6 +268,11 @@
         protoJank |= FrameTimelineEvent::JANK_SF_STUFFING;
         jankType &= ~JankType::SurfaceFlingerStuffing;
     }
+    if (jankType & JankType::Dropped) {
+        // Jank dropped does not append to other janks, it fully overrides.
+        protoJank |= FrameTimelineEvent::JANK_DROPPED;
+        jankType &= ~JankType::Dropped;
+    }
 
     // jankType should be 0 if all types of jank were checked for.
     LOG_ALWAYS_FATAL_IF(jankType != 0, "Unrecognized jank type value 0x%x", jankType);
@@ -365,8 +374,7 @@
 std::optional<int32_t> SurfaceFrame::getJankType() const {
     std::scoped_lock lock(mMutex);
     if (mPresentState == PresentState::Dropped) {
-        // Return no jank if it's a dropped frame since we cannot attribute a jank to a it.
-        return JankType::None;
+        return JankType::Dropped;
     }
     if (mActuals.presentTime == 0) {
         // Frame hasn't been presented yet.
@@ -503,7 +511,8 @@
         // We classify prediction expired as AppDeadlineMissed as the
         // TokenManager::kMaxTokens we store is large enough to account for a
         // reasonable app, so prediction expire would mean a huge scheduling delay.
-        mJankType = JankType::AppDeadlineMissed;
+        mJankType = mPresentState != PresentState::Presented ? JankType::Dropped
+                                                             : JankType::AppDeadlineMissed;
         deadlineDelta = -1;
         return;
     }
@@ -594,17 +603,17 @@
             mJankType |= displayFrameJankType;
         }
     }
+    if (mPresentState != PresentState::Presented) {
+        mJankType = JankType::Dropped;
+        // Since frame was not presented, lets drop any present value
+        mActuals.presentTime = 0;
+    }
 }
 
 void SurfaceFrame::onPresent(nsecs_t presentTime, int32_t displayFrameJankType, Fps refreshRate,
                              nsecs_t displayDeadlineDelta, nsecs_t displayPresentDelta) {
     std::scoped_lock lock(mMutex);
 
-    if (mPresentState != PresentState::Presented) {
-        // No need to update dropped buffers
-        return;
-    }
-
     mActuals.presentTime = presentTime;
     nsecs_t deadlineDelta = 0;
 
diff --git a/services/surfaceflinger/RefreshRateOverlay.cpp b/services/surfaceflinger/RefreshRateOverlay.cpp
index f1fd6db..607bec2 100644
--- a/services/surfaceflinger/RefreshRateOverlay.cpp
+++ b/services/surfaceflinger/RefreshRateOverlay.cpp
@@ -148,7 +148,8 @@
         LOG_ALWAYS_FATAL_IF(bufferStatus != OK, "RefreshRateOverlay: Buffer failed to allocate: %d",
                             bufferStatus);
 
-        sk_sp<SkSurface> surface = SkSurface::MakeRasterN32Premul(bufferWidth, bufferHeight);
+        sk_sp<SkSurface> surface = SkSurfaces::Raster(
+                SkImageInfo::MakeN32Premul(bufferWidth, bufferHeight));
         SkCanvas* canvas = surface->getCanvas();
         canvas->setMatrix(canvasTransform);
 
diff --git a/services/surfaceflinger/Scheduler/VsyncSchedule.h b/services/surfaceflinger/Scheduler/VsyncSchedule.h
index c037ac8..1b1396d 100644
--- a/services/surfaceflinger/Scheduler/VsyncSchedule.h
+++ b/services/surfaceflinger/Scheduler/VsyncSchedule.h
@@ -21,6 +21,7 @@
 #include <string>
 
 #include <android-base/thread_annotations.h>
+#include <ThreadContext.h>
 #include <ftl/enum.h>
 #include <ftl/optional.h>
 #include <ui/DisplayId.h>
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 9c3fb09..f3f6b6c 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -24,6 +24,7 @@
 
 #include "SurfaceFlinger.h"
 
+#include <aidl/android/hardware/power/Boost.h>
 #include <android-base/parseint.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
@@ -34,7 +35,6 @@
 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 #include <android/hardware/configstore/1.1/ISurfaceFlingerConfigs.h>
 #include <android/hardware/configstore/1.1/types.h>
-#include <android/hardware/power/Boost.h>
 #include <android/native_window.h>
 #include <android/os/IInputFlinger.h>
 #include <binder/IPCThreadState.h>
@@ -326,6 +326,7 @@
 bool SurfaceFlinger::useHwcForRgbToYuv;
 bool SurfaceFlinger::hasSyncFramework;
 int64_t SurfaceFlinger::maxFrameBufferAcquiredBuffers;
+int64_t SurfaceFlinger::minAcquiredBuffers = 1;
 uint32_t SurfaceFlinger::maxGraphicsWidth;
 uint32_t SurfaceFlinger::maxGraphicsHeight;
 bool SurfaceFlinger::useContextPriority;
@@ -377,6 +378,7 @@
 }
 
 SurfaceFlinger::SurfaceFlinger(Factory& factory) : SurfaceFlinger(factory, SkipInitialization) {
+    ATRACE_CALL();
     ALOGI("SurfaceFlinger is starting");
 
     hasSyncFramework = running_without_sync_framework(true);
@@ -386,6 +388,8 @@
     useHwcForRgbToYuv = force_hwc_copy_for_virtual_displays(false);
 
     maxFrameBufferAcquiredBuffers = max_frame_buffer_acquired_buffers(2);
+    minAcquiredBuffers =
+            SurfaceFlingerProperties::min_acquired_buffers().value_or(minAcquiredBuffers);
 
     maxGraphicsWidth = std::max(max_graphics_width(0), 0);
     maxGraphicsHeight = std::max(max_graphics_height(0), 0);
@@ -690,7 +694,7 @@
 
     // wait patiently for the window manager death
     const String16 name("window");
-    mWindowManager = defaultServiceManager()->getService(name);
+    mWindowManager = defaultServiceManager()->waitForService(name);
     if (mWindowManager != 0) {
         mWindowManager->linkToDeath(sp<IBinder::DeathRecipient>::fromExisting(this));
     }
@@ -704,7 +708,7 @@
     LOG_EVENT_LONG(LOGTAG_SF_STOP_BOOTANIM,
                    ns2ms(systemTime(SYSTEM_TIME_MONOTONIC)));
 
-    sp<IBinder> input(defaultServiceManager()->getService(String16("inputflinger")));
+    sp<IBinder> input(defaultServiceManager()->waitForService(String16("inputflinger")));
 
     static_cast<void>(mScheduler->schedule([=]() FTL_FAKE_GUARD(kMainThreadContext) {
         if (input == nullptr) {
@@ -803,6 +807,7 @@
 // Do not call property_set on main thread which will be blocked by init
 // Use StartPropertySetThread instead.
 void SurfaceFlinger::init() FTL_FAKE_GUARD(kMainThreadContext) {
+    ATRACE_CALL();
     ALOGI(  "SurfaceFlinger's main thread ready to run. "
             "Initializing graphics H/W...");
     addTransactionReadyFilters();
@@ -2020,7 +2025,7 @@
 }
 
 status_t SurfaceFlinger::notifyPowerBoost(int32_t boostId) {
-    using hardware::power::Boost;
+    using aidl::android::hardware::power::Boost;
     Boost powerBoost = static_cast<Boost>(boostId);
 
     if (powerBoost == Boost::INTERACTION) {
@@ -7797,7 +7802,7 @@
     if (presentLatency.count() % refreshRate.getPeriodNsecs()) {
         pipelineDepth++;
     }
-    return std::max(1ll, pipelineDepth - 1);
+    return std::max(minAcquiredBuffers, static_cast<int64_t>(pipelineDepth - 1));
 }
 
 status_t SurfaceFlinger::getMaxAcquiredBufferCount(int* buffers) const {
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index e27d21f..128da63 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -227,6 +227,10 @@
     // FramebufferSurface
     static int64_t maxFrameBufferAcquiredBuffers;
 
+    // Controls the minimum acquired buffers SurfaceFlinger will suggest via
+    // ISurfaceComposer.getMaxAcquiredBufferCount().
+    static int64_t minAcquiredBuffers;
+
     // Controls the maximum width and height in pixels that the graphics pipeline can support for
     // GPU fallback composition. For example, 8k devices with 4k GPUs, or 4k devices with 2k GPUs.
     static uint32_t maxGraphicsWidth;
diff --git a/services/surfaceflinger/SurfaceFlingerProperties.cpp b/services/surfaceflinger/SurfaceFlingerProperties.cpp
index 20fa091..96c8b54 100644
--- a/services/surfaceflinger/SurfaceFlingerProperties.cpp
+++ b/services/surfaceflinger/SurfaceFlingerProperties.cpp
@@ -375,5 +375,9 @@
     return SurfaceFlingerProperties::ignore_hdr_camera_layers().value_or(defaultValue);
 }
 
+bool clear_slots_with_set_layer_buffer(bool defaultValue) {
+    return SurfaceFlingerProperties::clear_slots_with_set_layer_buffer().value_or(defaultValue);
+}
+
 } // namespace sysprop
 } // namespace android
diff --git a/services/surfaceflinger/SurfaceFlingerProperties.h b/services/surfaceflinger/SurfaceFlingerProperties.h
index 080feee..951f8f8 100644
--- a/services/surfaceflinger/SurfaceFlingerProperties.h
+++ b/services/surfaceflinger/SurfaceFlingerProperties.h
@@ -102,6 +102,8 @@
 
 bool ignore_hdr_camera_layers(bool defaultValue);
 
+bool clear_slots_with_set_layer_buffer(bool defaultValue);
+
 } // namespace sysprop
 } // namespace android
 #endif // SURFACEFLINGERPROPERTIES_H_
diff --git a/services/surfaceflinger/TimeStats/Android.bp b/services/surfaceflinger/TimeStats/Android.bp
index 4686eed..c3141be 100644
--- a/services/surfaceflinger/TimeStats/Android.bp
+++ b/services/surfaceflinger/TimeStats/Android.bp
@@ -7,14 +7,9 @@
     default_applicable_licenses: ["frameworks_native_license"],
 }
 
-cc_library {
-    name: "libtimestats",
-    srcs: [
-        "TimeStats.cpp",
-    ],
-    header_libs: [
-        "libscheduler_headers",
-    ],
+cc_defaults {
+    name: "libtimestats_deps",
+
     shared_libs: [
         "android.hardware.graphics.composer@2.4",
         "libbase",
@@ -22,17 +17,34 @@
         "liblog",
         "libprotobuf-cpp-lite",
         "libtimestats_atoms_proto",
-        "libtimestats_proto",
         "libui",
         "libutils",
     ],
+
+    static_libs: [
+        "libtimestats_proto",
+    ],
+
+    export_static_lib_headers: [
+        "libtimestats_proto",
+    ],
+}
+
+cc_library {
+    name: "libtimestats",
+    defaults: [
+        "libtimestats_deps",
+    ],
+    srcs: [
+        "TimeStats.cpp",
+    ],
+    header_libs: [
+        "libscheduler_headers",
+    ],
     export_include_dirs: ["."],
     export_header_lib_headers: [
         "libscheduler_headers",
     ],
-    export_shared_lib_headers: [
-        "libtimestats_proto",
-    ],
     cppflags: [
         "-Wall",
         "-Werror",
diff --git a/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp b/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
index cf1ca65..cbbcb91 100644
--- a/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
+++ b/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
@@ -115,7 +115,7 @@
     StringAppendF(&result, "badDesiredPresentFrames = %d\n", badDesiredPresentFrames);
     result.append("Jank payload for this layer:\n");
     result.append(jankPayload.toString());
-    result.append("SetFrateRate vote for this layer:\n");
+    result.append("SetFrameRate vote for this layer:\n");
     result.append(setFrameRateVote.toString());
     const auto iter = deltas.find("present2present");
     if (iter != deltas.end()) {
diff --git a/services/surfaceflinger/fuzzer/Android.bp b/services/surfaceflinger/fuzzer/Android.bp
index f76a8d7..0f9060d 100644
--- a/services/surfaceflinger/fuzzer/Android.bp
+++ b/services/surfaceflinger/fuzzer/Android.bp
@@ -138,3 +138,18 @@
         "surfaceflinger_frametracer_fuzzer.cpp",
     ],
 }
+
+cc_fuzz {
+    name: "surfaceflinger_service_fuzzer",
+    defaults: [
+        "surfaceflinger_fuzz_defaults",
+        "service_fuzzer_defaults",
+        "fuzzer_disable_leaks",
+    ],
+    srcs: [
+        "surfaceflinger_service_fuzzer.cpp",
+    ],
+    fuzz_config: {
+        triage_assignee: "waghpawan@google.com",
+    },
+}
diff --git a/services/surfaceflinger/fuzzer/surfaceflinger_service_fuzzer.cpp b/services/surfaceflinger/fuzzer/surfaceflinger_service_fuzzer.cpp
new file mode 100644
index 0000000..849a896
--- /dev/null
+++ b/services/surfaceflinger/fuzzer/surfaceflinger_service_fuzzer.cpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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 <fuzzbinder/libbinder_driver.h>
+
+#include "SurfaceFlinger.h"
+#include "SurfaceFlingerDefaultFactory.h"
+
+using namespace android;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+    DefaultFactory factory;
+    sp<SurfaceFlinger> flinger = sp<SurfaceFlinger>::make(factory);
+    flinger->init();
+
+    sp<SurfaceComposerAIDL> composerAIDL = sp<SurfaceComposerAIDL>::make(flinger);
+    fuzzService({flinger, composerAIDL}, FuzzedDataProvider(data, size));
+    return 0;
+}
diff --git a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
index bcbe21a..5cac086 100644
--- a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
+++ b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
@@ -470,4 +470,27 @@
     scope: Public
     access: Readonly
     prop_name: "ro.surface_flinger.ignore_hdr_camera_layers"
-}
\ No newline at end of file
+}
+
+# Controls the minimum acquired buffers SurfaceFlinger will suggest via
+# ISurfaceComposer.getMaxAcquiredBufferCount().
+prop {
+    api_name: "min_acquired_buffers"
+    type: Long
+    scope: Public
+    access: Readonly
+    prop_name: "ro.surface_flinger.min_acquired_buffers"
+}
+
+# When enabled, SurfaceFlinger will attempt to clear the per-layer HAL buffer cache slots for
+# buffers when they are evicted from the app cache by using additional setLayerBuffer commands.
+# Ideally, this behavior would always be enabled to reduce graphics memory consumption. However,
+# Some HAL implementations may not support the additional setLayerBuffer commands used to clear
+# the cache slots.
+prop {
+    api_name: "clear_slots_with_set_layer_buffer"
+    type: Boolean
+    scope: Public
+    access: Readonly
+    prop_name: "ro.surface_flinger.clear_slots_with_set_layer_buffer"
+}
diff --git a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
index 348a462..ba88acc 100644
--- a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
+++ b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
@@ -1,6 +1,10 @@
 props {
   module: "android.sysprop.SurfaceFlingerProperties"
   prop {
+    api_name: "clear_slots_with_set_layer_buffer"
+    prop_name: "ro.surface_flinger.clear_slots_with_set_layer_buffer"
+  }
+  prop {
     api_name: "color_space_agnostic_dataspace"
     type: Long
     prop_name: "ro.surface_flinger.color_space_agnostic_dataspace"
@@ -93,6 +97,11 @@
     prop_name: "ro.surface_flinger.max_virtual_display_dimension"
   }
   prop {
+    api_name: "min_acquired_buffers"
+    type: Long
+    prop_name: "ro.surface_flinger.min_acquired_buffers"
+  }
+  prop {
     api_name: "present_time_offset_from_vsync_ns"
     type: Long
     prop_name: "ro.surface_flinger.present_time_offset_from_vsync_ns"
diff --git a/services/surfaceflinger/tests/IPC_test.cpp b/services/surfaceflinger/tests/IPC_test.cpp
index 40a5d57..18bd3b9 100644
--- a/services/surfaceflinger/tests/IPC_test.cpp
+++ b/services/surfaceflinger/tests/IPC_test.cpp
@@ -289,7 +289,7 @@
             IPCThreadState::self()->joinThreadPool();
             [&]() { exit(0); }();
         }
-        sp<IBinder> binder = defaultServiceManager()->getService(serviceName);
+        sp<IBinder> binder = defaultServiceManager()->waitForService(serviceName);
         remote = interface_cast<IIPCTest>(binder);
         remote->setDeathToken(mDeathRecipient);
     }
diff --git a/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp b/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp
index 7077523..f1bb231 100644
--- a/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp
@@ -85,7 +85,7 @@
     ASSERT_EQ(ui::Transform::ROT_90, SurfaceFlinger::getActiveDisplayRotationFlags());
 }
 
-TEST_F(ActiveDisplayRotationFlagsTest, rotate90_inactive) {
+TEST_F(ActiveDisplayRotationFlagsTest, rotate90inactive) {
     auto displayToken = mOuterDisplay->getDisplayToken().promote();
     mFlinger.mutableDrawingState().displays.editValueFor(displayToken).orientation = ui::ROTATION_0;
     mFlinger.mutableCurrentState().displays.editValueFor(displayToken).orientation =
@@ -95,7 +95,7 @@
     ASSERT_EQ(ui::Transform::ROT_0, SurfaceFlinger::getActiveDisplayRotationFlags());
 }
 
-TEST_F(ActiveDisplayRotationFlagsTest, rotateBoth_innerActive) {
+TEST_F(ActiveDisplayRotationFlagsTest, rotateBothInnerActive) {
     auto displayToken = mInnerDisplay->getDisplayToken().promote();
     mFlinger.mutableDrawingState().displays.editValueFor(displayToken).orientation = ui::ROTATION_0;
     mFlinger.mutableCurrentState().displays.editValueFor(displayToken).orientation =
@@ -110,7 +110,7 @@
     ASSERT_EQ(ui::Transform::ROT_180, SurfaceFlinger::getActiveDisplayRotationFlags());
 }
 
-TEST_F(ActiveDisplayRotationFlagsTest, rotateBoth_outerActive) {
+TEST_F(ActiveDisplayRotationFlagsTest, rotateBothOuterActive) {
     mFlinger.mutableActiveDisplayId() = kOuterDisplayId;
     auto displayToken = mInnerDisplay->getDisplayToken().promote();
     mFlinger.mutableDrawingState().displays.editValueFor(displayToken).orientation = ui::ROTATION_0;
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 86af303..fa5fa95 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -161,7 +161,7 @@
         "android.hardware.power@1.1",
         "android.hardware.power@1.2",
         "android.hardware.power@1.3",
-        "android.hardware.power-V4-cpp",
+        "android.hardware.power-V4-ndk",
         "libaidlcommonsupport",
         "libcompositionengine_mocks",
         "libcompositionengine",
diff --git a/services/surfaceflinger/tests/unittests/FrameTimelineTest.cpp b/services/surfaceflinger/tests/unittests/FrameTimelineTest.cpp
index d26ef3c..8911430 100644
--- a/services/surfaceflinger/tests/unittests/FrameTimelineTest.cpp
+++ b/services/surfaceflinger/tests/unittests/FrameTimelineTest.cpp
@@ -1198,7 +1198,7 @@
 TEST_F(FrameTimelineTest, traceSurfaceFrame_emitsValidTracePacket) {
     auto tracingSession = getTracingSessionForTest();
     // Layer specific increment
-    EXPECT_CALL(*mTimeStats, incrementJankyFrames(_));
+    EXPECT_CALL(*mTimeStats, incrementJankyFrames(_)).Times(2);
     auto presentFence1 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
     auto presentFence2 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
 
@@ -1234,8 +1234,8 @@
     auto protoDroppedSurfaceFrameActualStart =
             createProtoActualSurfaceFrameStart(traceCookie + 2, surfaceFrameToken,
                                                displayFrameToken1, sPidOne, sLayerNameOne,
-                                               FrameTimelineEvent::PRESENT_DROPPED, false, false,
-                                               FrameTimelineEvent::JANK_NONE,
+                                               FrameTimelineEvent::PRESENT_DROPPED, true, false,
+                                               FrameTimelineEvent::JANK_DROPPED,
                                                FrameTimelineEvent::PREDICTION_VALID, true);
     auto protoDroppedSurfaceFrameActualEnd = createProtoFrameEnd(traceCookie + 2);
 
@@ -1470,7 +1470,7 @@
             createProtoActualSurfaceFrameStart(traceCookie + 1, surfaceFrameToken,
                                                displayFrameToken, sPidOne, sLayerNameOne,
                                                FrameTimelineEvent::PRESENT_DROPPED, false, false,
-                                               FrameTimelineEvent::JANK_NONE,
+                                               FrameTimelineEvent::JANK_DROPPED,
                                                FrameTimelineEvent::PREDICTION_EXPIRED, true);
     auto protoActualSurfaceFrameEnd = createProtoFrameEnd(traceCookie + 1);
 
diff --git a/services/surfaceflinger/tests/unittests/PowerAdvisorTest.cpp b/services/surfaceflinger/tests/unittests/PowerAdvisorTest.cpp
index 0d66d59..85f66f4 100644
--- a/services/surfaceflinger/tests/unittests/PowerAdvisorTest.cpp
+++ b/services/surfaceflinger/tests/unittests/PowerAdvisorTest.cpp
@@ -18,10 +18,10 @@
 #define LOG_TAG "PowerAdvisorTest"
 
 #include <DisplayHardware/PowerAdvisor.h>
-#include <compositionengine/Display.h>
-#include <ftl/fake_guard.h>
+#include <binder/Status.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
+#include <powermanager/PowerHalWrapper.h>
 #include <ui/DisplayId.h>
 #include <chrono>
 #include "TestableSurfaceFlinger.h"
@@ -50,7 +50,7 @@
     TestableSurfaceFlinger mFlinger;
     std::unique_ptr<PowerAdvisor> mPowerAdvisor;
     MockPowerHalController* mMockPowerHalController;
-    sp<MockIPowerHintSession> mMockPowerHintSession;
+    std::shared_ptr<MockIPowerHintSession> mMockPowerHintSession;
 };
 
 void PowerAdvisorTest::SetUp() {
@@ -64,13 +64,14 @@
 
 void PowerAdvisorTest::startPowerHintSession() {
     const std::vector<int32_t> threadIds = {1, 2, 3};
-    mMockPowerHintSession = android::sp<NiceMock<MockIPowerHintSession>>::make();
+    mMockPowerHintSession = ndk::SharedRefBase::make<NiceMock<MockIPowerHintSession>>();
     ON_CALL(*mMockPowerHalController, createHintSession)
-            .WillByDefault(
-                    Return(HalResult<sp<IPowerHintSession>>::fromStatus(binder::Status::ok(),
-                                                                        mMockPowerHintSession)));
+            .WillByDefault(Return(HalResult<std::shared_ptr<IPowerHintSession>>::
+                                          fromStatus(binder::Status::ok(), mMockPowerHintSession)));
     mPowerAdvisor->enablePowerHintSession(true);
     mPowerAdvisor->startPowerHintSession(threadIds);
+    ON_CALL(*mMockPowerHintSession, updateTargetWorkDuration)
+            .WillByDefault(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
 }
 
 void PowerAdvisorTest::setExpectedTiming(Duration totalFrameTargetDuration,
@@ -123,8 +124,8 @@
     EXPECT_CALL(*mMockPowerHintSession,
                 reportActualWorkDuration(ElementsAre(
                         Field(&WorkDuration::durationNanos, Eq(expectedDuration.ns())))))
-            .Times(1);
-
+            .Times(1)
+            .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
     fakeBasicFrameTiming(startTime, vsyncPeriod);
     setExpectedTiming(vsyncPeriod, startTime + vsyncPeriod);
     mPowerAdvisor->setDisplays(displayIds);
@@ -163,7 +164,8 @@
     EXPECT_CALL(*mMockPowerHintSession,
                 reportActualWorkDuration(ElementsAre(
                         Field(&WorkDuration::durationNanos, Eq(expectedDuration.ns())))))
-            .Times(1);
+            .Times(1)
+            .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
 
     fakeBasicFrameTiming(startTime, vsyncPeriod);
     setExpectedTiming(vsyncPeriod, startTime + vsyncPeriod);
@@ -205,7 +207,8 @@
     EXPECT_CALL(*mMockPowerHintSession,
                 reportActualWorkDuration(ElementsAre(
                         Field(&WorkDuration::durationNanos, Eq(expectedDuration.ns())))))
-            .Times(1);
+            .Times(1)
+            .WillOnce(Return(testing::ByMove(ndk::ScopedAStatus::ok())));
 
     fakeBasicFrameTiming(startTime, vsyncPeriod);
     setExpectedTiming(vsyncPeriod, startTime + vsyncPeriod);
diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index 682c998..fab3c0e 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -249,6 +249,11 @@
     EXPECT_EQ(2, mFlinger.calculateMaxAcquiredBufferCount(60_Hz, 40ms));
 
     EXPECT_EQ(1, mFlinger.calculateMaxAcquiredBufferCount(60_Hz, 10ms));
+
+    const auto savedMinAcquiredBuffers = mFlinger.mutableMinAcquiredBuffers();
+    mFlinger.mutableMinAcquiredBuffers() = 2;
+    EXPECT_EQ(2, mFlinger.calculateMaxAcquiredBufferCount(60_Hz, 10ms));
+    mFlinger.mutableMinAcquiredBuffers() = savedMinAcquiredBuffers;
 }
 
 MATCHER(Is120Hz, "") {
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_NotifyPowerBoostTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_NotifyPowerBoostTest.cpp
index 4e9f293..22b72f9 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_NotifyPowerBoostTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_NotifyPowerBoostTest.cpp
@@ -23,12 +23,12 @@
 #include "DisplayTransactionTestHelpers.h"
 #include "FakeDisplayInjector.h"
 
-#include <android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/Boost.h>
 
 namespace android {
 namespace {
 
-using android::hardware::power::Boost;
+using aidl::android::hardware::power::Boost;
 
 TEST_F(DisplayTransactionTest, notifyPowerBoostNotifiesTouchEvent) {
     using namespace std::chrono_literals;
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index 833984f..156c40a 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -622,6 +622,8 @@
         return SurfaceFlinger::sActiveDisplayRotationFlags;
     }
 
+    auto& mutableMinAcquiredBuffers() { return SurfaceFlinger::minAcquiredBuffers; }
+
     auto fromHandle(const sp<IBinder>& handle) { return LayerHandle::getLayer(handle); }
 
     ~TestableSurfaceFlinger() {
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPower.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPower.h
index 0ddc90d..a088aab 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPower.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPower.h
@@ -18,14 +18,14 @@
 
 #include "binder/Status.h"
 
-#include <android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPower.h>
 #include <gmock/gmock.h>
 
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::IPower;
+using aidl::android::hardware::power::IPowerHintSession;
+using aidl::android::hardware::power::Mode;
 using android::binder::Status;
-using android::hardware::power::Boost;
-using android::hardware::power::IPower;
-using android::hardware::power::IPowerHintSession;
-using android::hardware::power::Mode;
 
 namespace android::Hwc2::mock {
 
@@ -33,18 +33,19 @@
 public:
     MockIPower();
 
-    MOCK_METHOD(Status, isBoostSupported, (Boost boost, bool* ret), (override));
-    MOCK_METHOD(Status, setBoost, (Boost boost, int32_t durationMs), (override));
-    MOCK_METHOD(Status, isModeSupported, (Mode mode, bool* ret), (override));
-    MOCK_METHOD(Status, setMode, (Mode mode, bool enabled), (override));
-    MOCK_METHOD(Status, createHintSession,
+    MOCK_METHOD(ndk::ScopedAStatus, isBoostSupported, (Boost boost, bool* ret), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, setBoost, (Boost boost, int32_t durationMs), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, isModeSupported, (Mode mode, bool* ret), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, setMode, (Mode mode, bool enabled), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, createHintSession,
                 (int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
-                 int64_t durationNanos, sp<IPowerHintSession>* session),
+                 int64_t durationNanos, std::shared_ptr<IPowerHintSession>* session),
                 (override));
-    MOCK_METHOD(Status, getHintSessionPreferredRate, (int64_t * rate), (override));
-    MOCK_METHOD(int32_t, getInterfaceVersion, (), (override));
-    MOCK_METHOD(std::string, getInterfaceHash, (), (override));
-    MOCK_METHOD(IBinder*, onAsBinder, (), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getHintSessionPreferredRate, (int64_t * rate), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getInterfaceVersion, (int32_t * version), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getInterfaceHash, (std::string * hash), (override));
+    MOCK_METHOD(ndk::SpAIBinder, asBinder, (), (override));
+    MOCK_METHOD(bool, isRemote, (), (override));
 };
 
 } // namespace android::Hwc2::mock
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPowerHintSession.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPowerHintSession.h
index f4ded21..2b9520f 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPowerHintSession.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockIPowerHintSession.h
@@ -18,14 +18,14 @@
 
 #include "binder/Status.h"
 
-#include <android/hardware/power/IPower.h>
+#include <aidl/android/hardware/power/IPower.h>
 #include <gmock/gmock.h>
 
+using aidl::android::hardware::power::IPowerHintSession;
+using aidl::android::hardware::power::SessionHint;
 using android::binder::Status;
-using android::hardware::power::IPowerHintSession;
-using android::hardware::power::SessionHint;
 
-using namespace android::hardware::power;
+using namespace aidl::android::hardware::power;
 
 namespace android::Hwc2::mock {
 
@@ -33,16 +33,18 @@
 public:
     MockIPowerHintSession();
 
-    MOCK_METHOD(IBinder*, onAsBinder, (), (override));
-    MOCK_METHOD(Status, pause, (), (override));
-    MOCK_METHOD(Status, resume, (), (override));
-    MOCK_METHOD(Status, close, (), (override));
-    MOCK_METHOD(int32_t, getInterfaceVersion, (), (override));
-    MOCK_METHOD(std::string, getInterfaceHash, (), (override));
-    MOCK_METHOD(Status, updateTargetWorkDuration, (int64_t), (override));
-    MOCK_METHOD(Status, reportActualWorkDuration, (const ::std::vector<WorkDuration>&), (override));
-    MOCK_METHOD(Status, sendHint, (SessionHint), (override));
-    MOCK_METHOD(Status, setThreads, (const ::std::vector<int32_t>&), (override));
+    MOCK_METHOD(ndk::SpAIBinder, asBinder, (), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, pause, (), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, resume, (), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, close, (), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getInterfaceVersion, (int32_t * version), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, getInterfaceHash, (std::string * hash), (override));
+    MOCK_METHOD(bool, isRemote, (), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, updateTargetWorkDuration, (int64_t), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, reportActualWorkDuration, (const ::std::vector<WorkDuration>&),
+                (override));
+    MOCK_METHOD(ndk::ScopedAStatus, sendHint, (SessionHint), (override));
+    MOCK_METHOD(ndk::ScopedAStatus, setThreads, (const ::std::vector<int32_t>&), (override));
 };
 
 } // namespace android::Hwc2::mock
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerHalController.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerHalController.h
index 8e22f43..68fe3c5 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerHalController.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerHalController.h
@@ -31,8 +31,8 @@
 
 namespace android::Hwc2::mock {
 
-using android::hardware::power::Boost;
-using android::hardware::power::Mode;
+using aidl::android::hardware::power::Boost;
+using aidl::android::hardware::power::Mode;
 using android::power::HalResult;
 
 class MockPowerHalController : public power::PowerHalController {
@@ -42,8 +42,9 @@
     MOCK_METHOD(void, init, (), (override));
     MOCK_METHOD(HalResult<void>, setBoost, (Boost, int32_t), (override));
     MOCK_METHOD(HalResult<void>, setMode, (Mode, bool), (override));
-    MOCK_METHOD(HalResult<sp<hardware::power::IPowerHintSession>>, createHintSession,
-                (int32_t, int32_t, const std::vector<int32_t>&, int64_t), (override));
+    MOCK_METHOD(HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>,
+                createHintSession, (int32_t, int32_t, const std::vector<int32_t>&, int64_t),
+                (override));
     MOCK_METHOD(HalResult<int64_t>, getHintSessionPreferredRate, (), (override));
 };
 
diff --git a/services/vibratorservice/test/VibratorCallbackSchedulerTest.cpp b/services/vibratorservice/test/VibratorCallbackSchedulerTest.cpp
index aaeb8f9..4c0910a 100644
--- a/services/vibratorservice/test/VibratorCallbackSchedulerTest.cpp
+++ b/services/vibratorservice/test/VibratorCallbackSchedulerTest.cpp
@@ -102,18 +102,6 @@
     ASSERT_THAT(getExpiredCallbacks(), ElementsAre(3, 2, 1));
 }
 
-TEST_F(VibratorCallbackSchedulerTest, TestScheduleInParallelRunsInDelayOrder) {
-    std::vector<std::thread> threads;
-    for (int i = 0; i < 5; i++) {
-        threads.push_back(std::thread(
-                [=]() { mScheduler->schedule(createCallback(i), milliseconds(10 + 2 * i)); }));
-    }
-    std::for_each(threads.begin(), threads.end(), [](std::thread& t) { t.join(); });
-
-    ASSERT_TRUE(waitForCallbacks(5, 25ms));
-    ASSERT_THAT(getExpiredCallbacks(), ElementsAre(0, 1, 2, 3, 4));
-}
-
 TEST_F(VibratorCallbackSchedulerTest, TestDestructorDropsPendingCallbacksAndKillsThread) {
     mScheduler->schedule(createCallback(1), 5ms);
     mScheduler.reset(nullptr);