diff --git a/include/android/asset_manager.h b/include/android/asset_manager.h
index 2ac7d4d..6420cd0 100644
--- a/include/android/asset_manager.h
+++ b/include/android/asset_manager.h
@@ -29,6 +29,10 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 
+#if defined(__APPLE__)
+typedef off_t off64_t; // Mac OSX does not define off64_t
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/include/android/choreographer.h b/include/android/choreographer.h
index 6a91d98..bec3283 100644
--- a/include/android/choreographer.h
+++ b/include/android/choreographer.h
@@ -65,9 +65,19 @@
 #ifndef ANDROID_CHOREOGRAPHER_H
 #define ANDROID_CHOREOGRAPHER_H
 
+#include <stddef.h>
 #include <stdint.h>
 #include <sys/cdefs.h>
 
+// This file may also be built on glibc or on Windows/MacOS libc's, so no-op
+// and deprecated definitions are provided.
+#if !defined(__INTRODUCED_IN)
+#define __INTRODUCED_IN(__api_level) /* nothing */
+#endif
+#if !defined(__DEPRECATED_IN)
+#define __DEPRECATED_IN(__api_level, ...) __attribute__((__deprecated__))
+#endif
+
 __BEGIN_DECLS
 
 struct AChoreographer;
diff --git a/include/android/input.h b/include/android/input.h
index 16d86af..fec56f0 100644
--- a/include/android/input.h
+++ b/include/android/input.h
@@ -1490,6 +1490,17 @@
  */
 const AInputEvent* AMotionEvent_fromJava(JNIEnv* env, jobject motionEvent) __INTRODUCED_IN(31);
 
+/**
+ * Creates a java android.view.InputEvent object that is a copy of the specified native
+ * {@link AInputEvent}.
+ *
+ * Specified {@link AInputEvent} is require to be a valid {@link MotionEvent} or {@link KeyEvent}
+ * object.
+ *
+ *  Available since API level 35.
+ */
+jobject AInputEvent_toJava(JNIEnv* env, const AInputEvent* aInputEvent) __INTRODUCED_IN(35);
+
 struct AInputQueue;
 /**
  * Input queue
diff --git a/include/android/keycodes.h b/include/android/keycodes.h
index f8fb256..79cdbca 100644
--- a/include/android/keycodes.h
+++ b/include/android/keycodes.h
@@ -839,6 +839,10 @@
     AKEYCODE_MACRO_3 = 315,
     /** User customizable key #4. */
     AKEYCODE_MACRO_4 = 316,
+    /** Open Emoji picker */
+    AKEYCODE_EMOJI_PICKER = 317,
+    /** Take Screenshot */
+    AKEYCODE_SCREENSHOT = 318,
 
     // NOTE: If you add a new keycode here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.
diff --git a/include/android/performance_hint.h b/include/android/performance_hint.h
index 9d2c791..3c82d88 100644
--- a/include/android/performance_hint.h
+++ b/include/android/performance_hint.h
@@ -123,7 +123,8 @@
   *
   * @return APerformanceHintManager instance on success, nullptr on failure.
   */
-APerformanceHintManager* _Nullable APerformanceHint_getManager() __INTRODUCED_IN(__ANDROID_API_T__);
+APerformanceHintManager* _Nullable APerformanceHint_getManager()
+                         __INTRODUCED_IN(__ANDROID_API_T__);
 
 /**
  * Creates a session for the given set of threads and sets their initial target work
@@ -232,14 +233,14 @@
  * @param workDuration The {@link AWorkDuration} structure of times the thread group took to
  *     complete its last task in nanoseconds breaking down into different components.
  *
- *     The work period start timestamp, actual total duration and actual CPU duration must be
- *     positive.
+ *     The work period start timestamp and actual total duration must be greater than zero.
  *
- *     The actual GPU duration must be non-negative. If the actual GPU duration is 0, it means
- *     the actual GPU duration is not measured.
+ *     The actual CPU and GPU durations must be greater than or equal to zero, and at least one
+ *     of them must be greater than zero. When one of them is equal to zero, it means that type
+ *     of work was not measured for this workload.
  *
  * @return 0 on success.
- *         EINVAL if session is nullptr or any duration is an invalid number.
+ *         EINVAL if any duration is an invalid number.
  *         EPIPE if communication with the system service has failed.
  */
 int APerformanceHint_reportActualWorkDuration2(
@@ -260,14 +261,15 @@
  *
  * @param aWorkDuration The {@link AWorkDuration} created by calling {@link AWorkDuration_create()}
  */
-void AWorkDuration_release(AWorkDuration* _Nonnull WorkDuration) __INTRODUCED_IN(__ANDROID_API_V__);
+void AWorkDuration_release(AWorkDuration* _Nonnull aWorkDuration)
+     __INTRODUCED_IN(__ANDROID_API_V__);
 
 /**
  * Sets the work period start timestamp in nanoseconds.
  *
  * @param aWorkDuration The {@link AWorkDuration} created by calling {@link AWorkDuration_create()}
  * @param workPeriodStartTimestampNanos The work period start timestamp in nanoseconds based on
- *        CLOCK_MONOTONIC about when the work starts, the timestamp must be positive.
+ *        CLOCK_MONOTONIC about when the work starts. This timestamp must be greater than zero.
  */
 void AWorkDuration_setWorkPeriodStartTimestampNanos(AWorkDuration* _Nonnull aWorkDuration,
         int64_t workPeriodStartTimestampNanos) __INTRODUCED_IN(__ANDROID_API_V__);
@@ -276,8 +278,8 @@
  * Sets the actual total work duration in nanoseconds.
  *
  * @param aWorkDuration The {@link AWorkDuration} created by calling {@link AWorkDuration_create()}
- * @param actualTotalDurationNanos The actual total work duration in nanoseconds, the number must be
- *        positive.
+ * @param actualTotalDurationNanos The actual total work duration in nanoseconds. This number must
+ *        be greater than zero.
  */
 void AWorkDuration_setActualTotalDurationNanos(AWorkDuration* _Nonnull aWorkDuration,
         int64_t actualTotalDurationNanos) __INTRODUCED_IN(__ANDROID_API_V__);
@@ -286,8 +288,9 @@
  * Sets the actual CPU work duration in nanoseconds.
  *
  * @param aWorkDuration The {@link AWorkDuration} created by calling {@link AWorkDuration_create()}
- * @param actualCpuDurationNanos The actual CPU work duration in nanoseconds, the number must be
- *        positive.
+ * @param actualCpuDurationNanos The actual CPU work duration in nanoseconds. This number must be
+ *        greater than or equal to zero. If it is equal to zero, that means the CPU was not
+ *        measured.
  */
 void AWorkDuration_setActualCpuDurationNanos(AWorkDuration* _Nonnull aWorkDuration,
         int64_t actualCpuDurationNanos) __INTRODUCED_IN(__ANDROID_API_V__);
@@ -297,7 +300,7 @@
  *
  * @param aWorkDuration The {@link AWorkDuration} created by calling {@link AWorkDuration_create()}.
  * @param actualGpuDurationNanos The actual GPU work duration in nanoseconds, the number must be
- *        non-negative. If the actual GPU duration is 0, it means the actual GPU duration is
+ *        greater than or equal to zero. If it is equal to zero, that means the GPU was not
  *        measured.
  */
 void AWorkDuration_setActualGpuDurationNanos(AWorkDuration* _Nonnull aWorkDuration,
diff --git a/include/android/surface_control.h b/include/android/surface_control.h
index 14167e6..0765e01 100644
--- a/include/android/surface_control.h
+++ b/include/android/surface_control.h
@@ -537,9 +537,8 @@
 
 /**
  * Sets the desired extended range brightness for the layer. This only applies for layers whose
- * dataspace has RANGE_EXTENDED set on it.
- *
- * Available since API level 34.
+ * dataspace has RANGE_EXTENDED set on it. See: ASurfaceTransaction_setDesiredHdrHeadroom, prefer
+ * using this API for formats that encode an HDR/SDR ratio as part of generating the buffer.
  *
  * @param surface_control The layer whose extended range brightness is being specified
  * @param currentBufferRatio The current hdr/sdr ratio of the current buffer as represented as
@@ -573,6 +572,12 @@
  *                     determined entirely by the dataspace being used (ie, typically SDR
  *                     however PQ or HLG transfer functions will still result in HDR)
  *
+ *                     When called after ASurfaceTransaction_setDesiredHdrHeadroom, the
+ *                     desiredRatio will override the desiredHeadroom provided by
+ *                     ASurfaceTransaction_setDesiredHdrHeadroom. Conversely, when called before
+ *                     ASurfaceTransaction_setDesiredHdrHeadroom, the desiredHeadroom provided by
+ *.                    ASurfaceTransaction_setDesiredHdrHeadroom will override the desiredRatio.
+ *
  *                     Must be finite && >= 1.0f
  *
  * Available since API level 34.
@@ -583,6 +588,45 @@
                                                     __INTRODUCED_IN(__ANDROID_API_U__);
 
 /**
+ * Sets the desired hdr headroom for the layer. See: ASurfaceTransaction_setExtendedRangeBrightness,
+ * prefer using this API for formats that conform to HDR standards like HLG or HDR10, that do not
+ * communicate a HDR/SDR ratio as part of generating the buffer.
+ *
+ * @param surface_control The layer whose desired hdr headroom is being specified
+ *
+ * @param desiredHeadroom The desired hdr/sdr ratio as represented as peakHdrBrightnessInNits /
+ *                        targetSdrWhitePointInNits. This can be used to communicate the max
+ *                        desired brightness range of the panel. The system may not be able to, or
+ *                        may choose not to, deliver the requested range.
+ *
+ *                        While requesting a large desired ratio will result in the most
+ *                        dynamic range, voluntarily reducing the requested range can help
+ *                        improve battery life as well as can improve quality by ensuring
+ *                        greater bit depth is allocated to the luminance range in use.
+ *
+ *                        Default value is 0.0f and indicates that the system will choose the best
+ *                        headroom for this surface control's content. Typically, this means that
+ *                        HLG/PQ encoded content will be displayed with some HDR headroom greater
+ *                        than 1.0.
+ *
+ *                        When called after ASurfaceTransaction_setExtendedRangeBrightness, the
+ *                        desiredHeadroom will override the desiredRatio provided by
+ *                        ASurfaceTransaction_setExtendedRangeBrightness. Conversely, when called
+ *                        before ASurfaceTransaction_setExtendedRangeBrightness, the desiredRatio
+ *                        provided by ASurfaceTransaction_setExtendedRangeBrightness will override
+ *                        the desiredHeadroom.
+ *
+ *                        Must be finite && >= 1.0f or 0.0f to indicate there is no desired
+ *                        headroom.
+ *
+ * Available since API level 35.
+ */
+void ASurfaceTransaction_setDesiredHdrHeadroom(ASurfaceTransaction* _Nonnull transaction,
+                                               ASurfaceControl* _Nonnull surface_control,
+                                               float desiredHeadroom)
+        __INTRODUCED_IN(__ANDROID_API_V__);
+
+/**
  * Same as ASurfaceTransaction_setFrameRateWithChangeStrategy(transaction, surface_control,
  * frameRate, compatibility, ANATIVEWINDOW_CHANGE_FRAME_RATE_ONLY_IF_SEAMLESS).
  *
diff --git a/include/android/thermal.h b/include/android/thermal.h
index 0b57e93..fa168cd 100644
--- a/include/android/thermal.h
+++ b/include/android/thermal.h
@@ -111,7 +111,7 @@
  * It's passed the updated thermal status as parameter, as well as the
  * pointer provided by the client that registered a callback.
  */
-typedef void (*AThermal_StatusCallback)(void* data, AThermalStatus status);
+typedef void (*AThermal_StatusCallback)(void* _Nullable data, AThermalStatus status);
 
 /**
   * Acquire an instance of the thermal manager. This must be freed using
@@ -121,7 +121,7 @@
   *
   * @return manager instance on success, nullptr on failure.
   */
-AThermalManager* AThermal_acquireManager() __INTRODUCED_IN(30);
+AThermalManager* _Nonnull AThermal_acquireManager() __INTRODUCED_IN(30);
 
 /**
  * Release the thermal manager pointer acquired via
@@ -131,7 +131,7 @@
  *
  * @param manager The manager to be released.
  */
-void AThermal_releaseManager(AThermalManager *manager) __INTRODUCED_IN(30);
+void AThermal_releaseManager(AThermalManager* _Nonnull manager) __INTRODUCED_IN(30);
 
 /**
   * Gets the current thermal status.
@@ -143,7 +143,8 @@
   *
   * @return current thermal status, ATHERMAL_STATUS_ERROR on failure.
   */
-AThermalStatus AThermal_getCurrentThermalStatus(AThermalManager *manager) __INTRODUCED_IN(30);
+AThermalStatus
+AThermal_getCurrentThermalStatus(AThermalManager* _Nonnull manager) __INTRODUCED_IN(30);
 
 /**
  * Register the thermal status listener for thermal status change.
@@ -160,8 +161,9 @@
  *         EPERM if the required permission is not held.
  *         EPIPE if communication with the system service has failed.
  */
-int AThermal_registerThermalStatusListener(AThermalManager *manager,
-        AThermal_StatusCallback callback, void *data) __INTRODUCED_IN(30);
+int AThermal_registerThermalStatusListener(AThermalManager* _Nonnull manager,
+                                           AThermal_StatusCallback _Nullable callback,
+                                           void* _Nullable data) __INTRODUCED_IN(30);
 
 /**
  * Unregister the thermal status listener previously resgistered.
@@ -178,8 +180,9 @@
  *         EPERM if the required permission is not held.
  *         EPIPE if communication with the system service has failed.
  */
-int AThermal_unregisterThermalStatusListener(AThermalManager *manager,
-        AThermal_StatusCallback callback, void *data) __INTRODUCED_IN(30);
+int AThermal_unregisterThermalStatusListener(AThermalManager* _Nonnull manager,
+                                             AThermal_StatusCallback _Nullable callback,
+                                             void* _Nullable data) __INTRODUCED_IN(30);
 
 /**
  * Provides an estimate of how much thermal headroom the device currently has before
@@ -219,8 +222,8 @@
  *         as described above. Returns NaN if the device does not support this functionality or
  *         if this function is called significantly faster than once per second.
   */
-float AThermal_getThermalHeadroom(AThermalManager *manager,
-        int forecastSeconds) __INTRODUCED_IN(31);
+float AThermal_getThermalHeadroom(AThermalManager* _Nonnull manager,
+                                  int forecastSeconds) __INTRODUCED_IN(31);
 
 /**
  * This struct defines an instance of headroom threshold value and its status.
@@ -282,9 +285,10 @@
  *         EPIPE if communication with the system service has failed.
  *         ENOSYS if the feature is disabled by the current system.
  */
-int AThermal_getThermalHeadroomThresholds(AThermalManager* manager,
-                                          const AThermalHeadroomThreshold ** outThresholds,
-                                          size_t* size) __INTRODUCED_IN(35);
+int AThermal_getThermalHeadroomThresholds(AThermalManager* _Nonnull manager,
+                                          const AThermalHeadroomThreshold* _Nonnull
+                                          * _Nullable outThresholds,
+                                          size_t* _Nonnull size) __INTRODUCED_IN(35);
 
 #ifdef __cplusplus
 }
diff --git a/include/ftl/details/future.h b/include/ftl/details/future.h
index df1323e..8d82e0f 100644
--- a/include/ftl/details/future.h
+++ b/include/ftl/details/future.h
@@ -73,8 +73,18 @@
     return std::get<Impl>(self()).get();
   }
 
+  template <class Rep, class Period>
+  std::future_status wait_for(const std::chrono::duration<Rep, Period>& timeout_duration) const {
+    if (std::holds_alternative<T>(self())) {
+      return std::future_status::ready;
+    }
+
+    return std::get<Impl>(self()).wait_for(timeout_duration);
+  }
+
  private:
   auto& self() { return static_cast<Self&>(*this).future_; }
+  const auto& self() const { return static_cast<const Self&>(*this).future_; }
 };
 
 template <typename Self, typename T>
@@ -90,6 +100,15 @@
     return std::get<Impl>(self()).get();
   }
 
+  template <class Rep, class Period>
+  std::future_status wait_for(const std::chrono::duration<Rep, Period>& timeout_duration) const {
+    if (std::holds_alternative<T>(self())) {
+      return std::future_status::ready;
+    }
+
+    return std::get<Impl>(self()).wait_for(timeout_duration);
+  }
+
  private:
   const auto& self() const { return static_cast<const Self&>(*this).future_; }
 };
diff --git a/include/ftl/expected.h b/include/ftl/expected.h
new file mode 100644
index 0000000..12b6102
--- /dev/null
+++ b/include/ftl/expected.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android-base/expected.h>
+#include <ftl/optional.h>
+
+#include <utility>
+
+namespace android::ftl {
+
+// Superset of base::expected<T, E> with monadic operations.
+//
+// TODO: Extend std::expected<T, E> in C++23.
+//
+template <typename T, typename E>
+struct Expected final : base::expected<T, E> {
+  using Base = base::expected<T, E>;
+  using Base::expected;
+
+  using Base::error;
+  using Base::has_value;
+  using Base::value;
+
+  template <typename P>
+  constexpr bool has_error(P predicate) const {
+    return !has_value() && predicate(error());
+  }
+
+  constexpr Optional<T> value_opt() const& {
+    return has_value() ? Optional(value()) : std::nullopt;
+  }
+
+  constexpr Optional<T> value_opt() && {
+    return has_value() ? Optional(std::move(value())) : std::nullopt;
+  }
+
+  // Delete new for this class. Its base doesn't have a virtual destructor, and
+  // if it got deleted via base class pointer, it would cause undefined
+  // behavior. There's not a good reason to allocate this object on the heap
+  // anyway.
+  static void* operator new(size_t) = delete;
+  static void* operator new[](size_t) = delete;
+};
+
+template <typename E>
+constexpr auto Unexpected(E&& error) {
+  return base::unexpected(std::forward<E>(error));
+}
+
+}  // namespace android::ftl
diff --git a/include/ftl/fake_guard.h b/include/ftl/fake_guard.h
index bacd1b2..e601251 100644
--- a/include/ftl/fake_guard.h
+++ b/include/ftl/fake_guard.h
@@ -85,6 +85,5 @@
 
 #define FTL_MAKE_FAKE_GUARD(arg1, arg2, guard, ...) guard
 
-// The void argument suppresses a warning about zero variadic macro arguments.
 #define FTL_FAKE_GUARD(...) \
-  FTL_MAKE_FAKE_GUARD(__VA_ARGS__, FTL_FAKE_GUARD2, FTL_FAKE_GUARD1, void)(__VA_ARGS__)
+  FTL_MAKE_FAKE_GUARD(__VA_ARGS__, FTL_FAKE_GUARD2, FTL_FAKE_GUARD1, )(__VA_ARGS__)
diff --git a/include/ftl/future.h b/include/ftl/future.h
index c78f9b7..dad180f 100644
--- a/include/ftl/future.h
+++ b/include/ftl/future.h
@@ -51,6 +51,7 @@
   // Forwarding functions. Base::share is only defined when FutureImpl is std::future, whereas the
   // following are defined for either FutureImpl:
   using Base::get;
+  using Base::wait_for;
 
   // Attaches a continuation to the future. The continuation is a function that maps T to either R
   // or ftl::Future<R>. In the former case, the chain wraps the result in a future as if by
diff --git a/include/ftl/small_map.h b/include/ftl/small_map.h
index 49cde7f..83d5967 100644
--- a/include/ftl/small_map.h
+++ b/include/ftl/small_map.h
@@ -107,12 +107,20 @@
   template <typename Q, typename W, std::size_t M, typename E>
   SmallMap(SmallMap<Q, W, M, E> other) : map_(std::move(other.map_)) {}
 
+  static constexpr size_type static_capacity() { return N; }
+
   size_type max_size() const { return map_.max_size(); }
   size_type size() const { return map_.size(); }
   bool empty() const { return map_.empty(); }
 
   // Returns whether the map is backed by static or dynamic storage.
-  bool dynamic() const { return map_.dynamic(); }
+  bool dynamic() const {
+    if constexpr (static_capacity() > 0) {
+      return map_.dynamic();
+    } else {
+      return true;
+    }
+  }
 
   iterator begin() { return map_.begin(); }
   const_iterator begin() const { return cbegin(); }
@@ -171,9 +179,15 @@
       return {it, false};
     }
 
-    auto& ref = map_.emplace_back(std::piecewise_construct, std::forward_as_tuple(key),
-                                  std::forward_as_tuple(std::forward<Args>(args)...));
-    return {&ref, true};
+    decltype(auto) ref_or_it =
+        map_.emplace_back(std::piecewise_construct, std::forward_as_tuple(key),
+                          std::forward_as_tuple(std::forward<Args>(args)...));
+
+    if constexpr (static_capacity() > 0) {
+      return {&ref_or_it, true};
+    } else {
+      return {ref_or_it, true};
+    }
   }
 
   // Replaces a mapping if it exists, and returns an iterator to it. Returns the end() iterator
diff --git a/include/ftl/small_vector.h b/include/ftl/small_vector.h
index 11294c3..43e9fac 100644
--- a/include/ftl/small_vector.h
+++ b/include/ftl/small_vector.h
@@ -124,30 +124,29 @@
   DISPATCH(size_type, size, const)
   DISPATCH(bool, empty, const)
 
-  // noexcept to suppress warning about zero variadic macro arguments.
-  DISPATCH(iterator, begin, noexcept)
+  DISPATCH(iterator, begin, )
   DISPATCH(const_iterator, begin, const)
   DISPATCH(const_iterator, cbegin, const)
 
-  DISPATCH(iterator, end, noexcept)
+  DISPATCH(iterator, end, )
   DISPATCH(const_iterator, end, const)
   DISPATCH(const_iterator, cend, const)
 
-  DISPATCH(reverse_iterator, rbegin, noexcept)
+  DISPATCH(reverse_iterator, rbegin, )
   DISPATCH(const_reverse_iterator, rbegin, const)
   DISPATCH(const_reverse_iterator, crbegin, const)
 
-  DISPATCH(reverse_iterator, rend, noexcept)
+  DISPATCH(reverse_iterator, rend, )
   DISPATCH(const_reverse_iterator, rend, const)
   DISPATCH(const_reverse_iterator, crend, const)
 
-  DISPATCH(iterator, last, noexcept)
+  DISPATCH(iterator, last, )
   DISPATCH(const_iterator, last, const)
 
-  DISPATCH(reference, front, noexcept)
+  DISPATCH(reference, front, )
   DISPATCH(const_reference, front, const)
 
-  DISPATCH(reference, back, noexcept)
+  DISPATCH(reference, back, )
   DISPATCH(const_reference, back, const)
 
   reference operator[](size_type i) {
@@ -211,13 +210,13 @@
   //
   // The last() and end() iterators are invalidated.
   //
-  DISPATCH(void, pop_back, noexcept)
+  DISPATCH(void, pop_back, )
 
   // Removes all elements.
   //
   // All iterators are invalidated.
   //
-  DISPATCH(void, clear, noexcept)
+  DISPATCH(void, clear, )
 
 #undef DISPATCH
 
diff --git a/include/input/AccelerationCurve.h b/include/input/AccelerationCurve.h
new file mode 100644
index 0000000..0cf648a
--- /dev/null
+++ b/include/input/AccelerationCurve.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2024 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 <cstdint>
+#include <vector>
+
+namespace android {
+
+/**
+ * Describes a section of an acceleration curve as a function which outputs a scaling factor (gain)
+ * for the pointer movement, given the speed of the mouse or finger (in mm/s):
+ *
+ *     gain(input_speed_mm_per_s) = baseGain + reciprocal / input_speed_mm_per_s
+ */
+struct AccelerationCurveSegment {
+    /**
+     * The maximum pointer speed at which this segment should apply, in mm/s. The last segment in a
+     * curve should always set this to infinity.
+     */
+    double maxPointerSpeedMmPerS;
+    /** The gain for this segment before the reciprocal is taken into account. */
+    double baseGain;
+    /** The reciprocal part of the formula, which should be divided by the input speed. */
+    double reciprocal;
+};
+
+/**
+ * Creates an acceleration curve for the given pointer sensitivity value. The sensitivity value
+ * should be between -7 (for the lowest sensitivity) and 7, inclusive.
+ */
+std::vector<AccelerationCurveSegment> createAccelerationCurveForPointerSensitivity(
+        int32_t sensitivity);
+
+} // namespace android
diff --git a/include/input/Input.h b/include/input/Input.h
index 1c4ea6b..a84dcfc 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -180,7 +180,8 @@
  * Declare a concrete type for the NDK's input event forward declaration.
  */
 struct AInputEvent {
-    virtual ~AInputEvent() { }
+    virtual ~AInputEvent() {}
+    bool operator==(const AInputEvent&) const = default;
 };
 
 /*
@@ -515,6 +516,8 @@
     PointerProperties& operator=(const PointerProperties&) = default;
 };
 
+std::ostream& operator<<(std::ostream& out, const PointerProperties& properties);
+
 // TODO(b/211379801) : Use a strong type from ftl/mixins.h instead
 using DeviceId = int32_t;
 
@@ -543,6 +546,8 @@
 
     static int32_t nextId();
 
+    bool operator==(const InputEvent&) const = default;
+
 protected:
     void initialize(int32_t id, DeviceId deviceId, uint32_t source, int32_t displayId,
                     std::array<uint8_t, 32> hmac);
@@ -596,6 +601,8 @@
 
     static const char* actionToString(int32_t action);
 
+    bool operator==(const KeyEvent&) const = default;
+
 protected:
     int32_t mAction;
     int32_t mFlags;
@@ -915,6 +922,9 @@
     // The rounding precision for transformed motion events.
     static constexpr float ROUNDING_PRECISION = 0.001f;
 
+    bool operator==(const MotionEvent&) const;
+    inline bool operator!=(const MotionEvent& o) const { return !(*this == o); };
+
 protected:
     int32_t mAction;
     int32_t mActionButton;
diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index b7751f7..57b659d 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -75,6 +75,17 @@
     bool operator!=(const InputDeviceIdentifier&) const = default;
 };
 
+/**
+ * Holds View related behaviors for an InputDevice.
+ */
+struct InputDeviceViewBehavior {
+    /**
+     * The smooth scroll behavior that applies for all source/axis, if defined by the device.
+     * Empty optional if the device has not specified the default smooth scroll behavior.
+     */
+    std::optional<bool> shouldSmoothScroll;
+};
+
 /* Types of input device sensors. Keep sync with core/java/android/hardware/Sensor.java */
 enum class InputDeviceSensorType : int32_t {
     ACCELEROMETER = ASENSOR_TYPE_ACCELEROMETER,
@@ -266,7 +277,8 @@
 
     void initialize(int32_t id, int32_t generation, int32_t controllerNumber,
                     const InputDeviceIdentifier& identifier, const std::string& alias,
-                    bool isExternal, bool hasMic, int32_t associatedDisplayId);
+                    bool isExternal, bool hasMic, int32_t associatedDisplayId,
+                    InputDeviceViewBehavior viewBehavior = {{}});
 
     inline int32_t getId() const { return mId; }
     inline int32_t getControllerNumber() const { return mControllerNumber; }
@@ -298,6 +310,8 @@
         return mKeyboardLayoutInfo;
     }
 
+    inline const InputDeviceViewBehavior& getViewBehavior() const { return mViewBehavior; }
+
     inline void setKeyCharacterMap(const std::shared_ptr<KeyCharacterMap> value) {
         mKeyCharacterMap = value;
     }
@@ -359,6 +373,8 @@
     std::unordered_map<int32_t, InputDeviceLightInfo> mLights;
     /* Map from battery ID to battery info */
     std::unordered_map<int32_t, InputDeviceBatteryInfo> mBatteries;
+    /** The View related behaviors for the device. */
+    InputDeviceViewBehavior mViewBehavior;
 };
 
 /* Types of input device configuration files. */
diff --git a/include/input/InputTransport.h b/include/input/InputTransport.h
index 59b9495..42dcd3c 100644
--- a/include/input/InputTransport.h
+++ b/include/input/InputTransport.h
@@ -35,18 +35,16 @@
 #include <android-base/result.h>
 #include <android-base/unique_fd.h>
 
+#include <android/os/InputChannelCore.h>
 #include <binder/IBinder.h>
-#include <binder/Parcelable.h>
 #include <input/Input.h>
 #include <input/InputVerifier.h>
 #include <sys/stat.h>
 #include <ui/Transform.h>
 #include <utils/BitSet.h>
 #include <utils/Errors.h>
-#include <utils/RefBase.h>
 #include <utils/Timers.h>
 
-
 namespace android {
 class Parcel;
 
@@ -231,18 +229,15 @@
  * input messages across processes.  Each channel has a descriptive name for debugging purposes.
  *
  * Each endpoint has its own InputChannel object that specifies its file descriptor.
+ * For parceling, this relies on android::os::InputChannelCore, defined in aidl.
  *
  * The input channel is closed when all references to it are released.
  */
-class InputChannel : public Parcelable {
+class InputChannel : private android::os::InputChannelCore {
 public:
-    static std::unique_ptr<InputChannel> create(const std::string& name,
-                                                android::base::unique_fd fd, sp<IBinder> token);
-    InputChannel() = default;
-    InputChannel(const InputChannel& other)
-          : mName(other.mName), mFd(other.dupFd()), mToken(other.mToken){};
-    InputChannel(const std::string name, android::base::unique_fd fd, sp<IBinder> token);
-    ~InputChannel() override;
+    static std::unique_ptr<InputChannel> create(android::os::InputChannelCore&& parceledChannel);
+    ~InputChannel();
+
     /**
      * Create a pair of input channels.
      * The two returned input channels are equivalent, and are labeled as "server" and "client"
@@ -254,9 +249,8 @@
                                          std::unique_ptr<InputChannel>& outServerChannel,
                                          std::unique_ptr<InputChannel>& outClientChannel);
 
-    inline std::string getName() const { return mName; }
-    inline const android::base::unique_fd& getFd() const { return mFd; }
-    inline sp<IBinder> getToken() const { return mToken; }
+    inline std::string getName() const { return name; }
+    inline int getFd() const { return fd.get(); }
 
     /* Send a message to the other endpoint.
      *
@@ -283,13 +277,37 @@
      */
     status_t receiveMessage(InputMessage* msg);
 
+    /* Tells whether there is a message in the channel available to be received.
+     *
+     * This is only a performance hint and may return false negative results. Clients should not
+     * rely on availability of the message based on the return value.
+     */
+    bool probablyHasInput() const;
+
+    /* Wait until there is a message in the channel.
+     *
+     * The |timeout| specifies how long to block waiting for an input event to appear. Negative
+     * values are not allowed.
+     *
+     * In some cases returning before timeout expiration can happen without a message available.
+     * This could happen after the channel was closed on the other side. Another possible reason
+     * is incorrect setup of the channel.
+     */
+    void waitForMessage(std::chrono::milliseconds timeout) const;
+
     /* Return a new object that has a duplicate of this channel's fd. */
     std::unique_ptr<InputChannel> dup() const;
 
-    void copyTo(InputChannel& outChannel) const;
+    void copyTo(android::os::InputChannelCore& outChannel) const;
 
-    status_t readFromParcel(const android::Parcel* parcel) override;
-    status_t writeToParcel(android::Parcel* parcel) const override;
+    /**
+     * Similar to "copyTo", but it takes ownership of the provided InputChannel (and after this is
+     * called, it destroys it).
+     * @param from the InputChannel that should be converted to InputChannelCore
+     * @param outChannel the pre-allocated InputChannelCore to which to transfer the 'from' channel
+     */
+    static void moveChannel(std::unique_ptr<InputChannel> from,
+                            android::os::InputChannelCore& outChannel);
 
     /**
      * The connection token is used to identify the input connection, i.e.
@@ -305,26 +323,11 @@
      */
     sp<IBinder> getConnectionToken() const;
 
-    bool operator==(const InputChannel& inputChannel) const {
-        struct stat lhs, rhs;
-        if (fstat(mFd.get(), &lhs) != 0) {
-            return false;
-        }
-        if (fstat(inputChannel.getFd().get(), &rhs) != 0) {
-            return false;
-        }
-        // If file descriptors are pointing to same inode they are duplicated fds.
-        return inputChannel.getName() == getName() && inputChannel.getConnectionToken() == mToken &&
-                lhs.st_ino == rhs.st_ino;
-    }
-
 private:
-    base::unique_fd dupFd() const;
+    static std::unique_ptr<InputChannel> create(const std::string& name,
+                                                android::base::unique_fd fd, sp<IBinder> token);
 
-    std::string mName;
-    base::unique_fd mFd;
-
-    sp<IBinder> mToken;
+    InputChannel(const std::string name, android::base::unique_fd fd, sp<IBinder> token);
 };
 
 /*
@@ -339,7 +342,7 @@
     ~InputPublisher();
 
     /* Gets the underlying input channel. */
-    inline std::shared_ptr<InputChannel> getChannel() { return mChannel; }
+    inline InputChannel& getChannel() const { return *mChannel; }
 
     /* Publishes a key event to the input channel.
      *
@@ -518,6 +521,13 @@
      */
     int32_t getPendingBatchSource() const;
 
+    /* Returns true when there is *likely* a pending batch or a pending event in the channel.
+     *
+     * This is only a performance hint and may return false negative results. Clients should not
+     * rely on availability of the message based on the return value.
+     */
+    bool probablyHasInput() const;
+
     std::string dump() const;
 
 private:
diff --git a/include/input/PrintTools.h b/include/input/PrintTools.h
index 83fffa3..3470be4 100644
--- a/include/input/PrintTools.h
+++ b/include/input/PrintTools.h
@@ -117,11 +117,12 @@
 template <typename T>
 std::string dumpVector(const std::vector<T>& values,
                        std::string (*valueToString)(const T&) = constToString) {
-    std::string dump = valueToString(values[0]);
-    for (size_t i = 1; i < values.size(); i++) {
-        dump += ", " + valueToString(values[i]);
+    std::string out;
+    for (const auto& value : values) {
+        out += out.empty() ? "[" : ", ";
+        out += valueToString(value);
     }
-    return dump;
+    return out.empty() ? "[]" : (out + "]");
 }
 
 const char* toString(bool value);
diff --git a/include/input/VelocityControl.h b/include/input/VelocityControl.h
index b78f63e..7c58c87 100644
--- a/include/input/VelocityControl.h
+++ b/include/input/VelocityControl.h
@@ -16,7 +16,10 @@
 
 #pragma once
 
+#include <vector>
+
 #include <android-base/stringprintf.h>
+#include <input/AccelerationCurve.h>
 #include <input/Input.h>
 #include <input/VelocityTracker.h>
 #include <utils/Timers.h>
@@ -86,12 +89,7 @@
 class VelocityControl {
 public:
     VelocityControl();
-
-    /* Gets the various parameters. */
-    const VelocityControlParameters& getParameters() const;
-
-    /* Sets the various parameters. */
-    void setParameters(const VelocityControlParameters& parameters);
+    virtual ~VelocityControl() {}
 
     /* Resets the current movement counters to zero.
      * This has the effect of nullifying any acceleration. */
@@ -101,16 +99,55 @@
      * scaled / accelerated delta based on the current velocity. */
     void move(nsecs_t eventTime, float* deltaX, float* deltaY);
 
-private:
+protected:
+    virtual void scaleDeltas(float* deltaX, float* deltaY) = 0;
+
     // If no movements are received within this amount of time,
     // we assume the movement has stopped and reset the movement counters.
     static const nsecs_t STOP_TIME = 500 * 1000000; // 500 ms
 
-    VelocityControlParameters mParameters;
-
     nsecs_t mLastMovementTime;
     float mRawPositionX, mRawPositionY;
     VelocityTracker mVelocityTracker;
 };
 
+/**
+ * Velocity control using a simple acceleration curve where the acceleration factor increases
+ * linearly with movement speed, subject to minimum and maximum values.
+ */
+class SimpleVelocityControl : public VelocityControl {
+public:
+    /** Gets the various parameters. */
+    const VelocityControlParameters& getParameters() const;
+
+    /** Sets the various parameters. */
+    void setParameters(const VelocityControlParameters& parameters);
+
+protected:
+    virtual void scaleDeltas(float* deltaX, float* deltaY) override;
+
+private:
+    VelocityControlParameters mParameters;
+};
+
+/** Velocity control using a curve made up of multiple reciprocal segments. */
+class CurvedVelocityControl : public VelocityControl {
+public:
+    CurvedVelocityControl();
+
+    /** Sets the curve to be used for acceleration. */
+    void setCurve(const std::vector<AccelerationCurveSegment>& curve);
+
+    void setAccelerationEnabled(bool enabled);
+
+protected:
+    virtual void scaleDeltas(float* deltaX, float* deltaY) override;
+
+private:
+    const AccelerationCurveSegment& segmentForSpeed(float speedMmPerS);
+
+    bool mAccelerationEnabled = true;
+    std::vector<AccelerationCurveSegment> mCurveSegments;
+};
+
 } // namespace android
diff --git a/include/input/VirtualInputDevice.h b/include/input/VirtualInputDevice.h
index 21a2877..222dac8 100644
--- a/include/input/VirtualInputDevice.h
+++ b/include/input/VirtualInputDevice.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023 The Android Open Source Project
+ * 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.
@@ -64,6 +64,8 @@
 
 class VirtualMouse : public VirtualInputDevice {
 public:
+    // Expose to share with VirtualStylus.
+    static const std::map<int, UinputAction> BUTTON_ACTION_MAPPING;
     VirtualMouse(android::base::unique_fd fd);
     virtual ~VirtualMouse() override;
     bool writeButtonEvent(int32_t androidButtonCode, int32_t androidAction,
@@ -74,12 +76,13 @@
                           std::chrono::nanoseconds eventTime);
 
 private:
-    static const std::map<int, UinputAction> BUTTON_ACTION_MAPPING;
     static const std::map<int, int> BUTTON_CODE_MAPPING;
 };
 
 class VirtualTouchscreen : public VirtualInputDevice {
 public:
+    // Expose to share with VirtualStylus.
+    static const std::map<int, UinputAction> TOUCH_ACTION_MAPPING;
     VirtualTouchscreen(android::base::unique_fd fd);
     virtual ~VirtualTouchscreen() override;
     // TODO(b/259554911): changing float parameters to int32_t.
@@ -88,9 +91,7 @@
                          std::chrono::nanoseconds eventTime);
 
 private:
-    static const std::map<int, UinputAction> TOUCH_ACTION_MAPPING;
     static const std::map<int, int> TOOL_TYPE_MAPPING;
-
     /* The set of active touch pointers on this device.
      * We only allow pointer id to go up to MAX_POINTERS because the maximum slots of virtual
      * touchscreen is set up with MAX_POINTERS. Note that in other cases Android allows pointer id
@@ -101,4 +102,24 @@
     bool handleTouchDown(int32_t pointerId, std::chrono::nanoseconds eventTime);
     bool handleTouchUp(int32_t pointerId, std::chrono::nanoseconds eventTime);
 };
+
+class VirtualStylus : public VirtualInputDevice {
+public:
+    VirtualStylus(android::base::unique_fd fd);
+    ~VirtualStylus() override;
+    bool writeMotionEvent(int32_t toolType, int32_t action, int32_t locationX, int32_t locationY,
+                          int32_t pressure, int32_t tiltX, int32_t tiltY,
+                          std::chrono::nanoseconds eventTime);
+    bool writeButtonEvent(int32_t androidButtonCode, int32_t androidAction,
+                          std::chrono::nanoseconds eventTime);
+
+private:
+    static const std::map<int, int> TOOL_TYPE_MAPPING;
+    static const std::map<int, int> BUTTON_CODE_MAPPING;
+    // True if the stylus is touching or hovering on the screen.
+    bool mIsStylusDown;
+    bool handleStylusDown(uint16_t tool, std::chrono::nanoseconds eventTime);
+    bool handleStylusUp(uint16_t tool, std::chrono::nanoseconds eventTime);
+};
+
 } // namespace android
diff --git a/include/powermanager/PowerHalController.h b/include/powermanager/PowerHalController.h
index 9e426d3..c50bc4a 100644
--- a/include/powermanager/PowerHalController.h
+++ b/include/powermanager/PowerHalController.h
@@ -62,7 +62,15 @@
     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<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>
+    createHintSessionWithConfig(int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
+                                int64_t durationNanos,
+                                aidl::android::hardware::power::SessionTag tag,
+                                aidl::android::hardware::power::SessionConfig* config) override;
     virtual HalResult<int64_t> getHintSessionPreferredRate() override;
+    virtual HalResult<aidl::android::hardware::power::ChannelConfig> getSessionChannel(
+            int tgid, int uid) override;
+    virtual HalResult<void> closeSessionChannel(int tgid, int uid) override;
 
 private:
     std::mutex mConnectedHalMutex;
@@ -75,7 +83,7 @@
 
     std::shared_ptr<HalWrapper> initHal();
     template <typename T>
-    HalResult<T> processHalResult(HalResult<T> result, const char* functionName);
+    HalResult<T> processHalResult(HalResult<T>&& result, const char* functionName);
 };
 
 // -------------------------------------------------------------------------------------------------
diff --git a/include/powermanager/PowerHalWrapper.h b/include/powermanager/PowerHalWrapper.h
index 4e4a1b0..e2da014 100644
--- a/include/powermanager/PowerHalWrapper.h
+++ b/include/powermanager/PowerHalWrapper.h
@@ -14,19 +14,22 @@
  * limitations under the License.
  */
 
-#ifndef ANDROID_POWERHALWRAPPER_H
-#define ANDROID_POWERHALWRAPPER_H
+#pragma once
 
 #include <aidl/android/hardware/power/Boost.h>
+#include <aidl/android/hardware/power/ChannelConfig.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/SessionConfig.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 <binder/Status.h>
 
+#include <utility>
+
 namespace android {
 
 namespace power {
@@ -42,44 +45,63 @@
 template <typename T>
 class HalResult {
 public:
-    static HalResult<T> ok(T value) { return HalResult(value); }
-    static HalResult<T> failed(std::string msg) {
-        return HalResult(std::move(msg), /* unsupported= */ false);
-    }
+    static HalResult<T> ok(T&& value) { return HalResult(std::forward<T>(value)); }
+    static HalResult<T> ok(T& value) { return HalResult<T>::ok(T{value}); }
+    static HalResult<T> failed(std::string msg) { return HalResult(msg, /* unsupported= */ false); }
     static HalResult<T> unsupported() { return HalResult("", /* unsupported= */ true); }
 
-    static HalResult<T> fromStatus(const 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();
         }
         if (status.isOk()) {
-            return HalResult<T>::ok(data);
+            return HalResult<T>::ok(std::forward<T>(data));
         }
         return HalResult<T>::failed(std::string(status.toString8().c_str()));
     }
 
-    static HalResult<T> fromStatus(const ndk::ScopedAStatus& status, T data) {
+    static HalResult<T> fromStatus(const binder::Status& status, T& data) {
+        return HalResult<T>::fromStatus(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>::ok(std::forward<T>(data));
         }
         return HalResult<T>::failed(std::string(status.getDescription()));
     }
 
+    static HalResult<T> fromStatus(const ndk::ScopedAStatus& status, T& data) {
+        return HalResult<T>::fromStatus(status, T{data});
+    }
+
     template <typename R>
-    static HalResult<T> fromReturn(hardware::Return<R>& ret, T data) {
-        return ret.isOk() ? HalResult<T>::ok(data) : HalResult<T>::failed(ret.description());
+    static HalResult<T> fromReturn(hardware::Return<R>& ret, T&& data) {
+        return ret.isOk() ? HalResult<T>::ok(std::forward<T>(data))
+                          : HalResult<T>::failed(ret.description());
+    }
+
+    template <typename R>
+    static HalResult<T> fromReturn(hardware::Return<R>& ret, T& data) {
+        return HalResult<T>::fromReturn(ret, T{data});
     }
 
     template <typename R>
     static HalResult<T> fromReturn(hardware::Return<R>& ret, hardware::power::V1_0::Status status,
-                                   T data) {
-        return ret.isOk() ? HalResult<T>::fromStatus(status, data)
+                                   T&& data) {
+        return ret.isOk() ? HalResult<T>::fromStatus(status, std::forward<T>(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) {
+        return HalResult<T>::fromReturn(ret, status, T{data});
+    }
+
     // This will throw std::bad_optional_access if this result is not ok.
     const T& value() const { return mValue.value(); }
     bool isOk() const { return !mUnsupported && mValue.has_value(); }
@@ -92,8 +114,8 @@
     std::string mErrorMessage;
     bool mUnsupported;
 
-    explicit HalResult(T value)
-          : mValue(std::make_optional(value)), mErrorMessage(), mUnsupported(false) {}
+    explicit HalResult(T&& value)
+          : mValue{std::move(value)}, mErrorMessage(), mUnsupported(false) {}
     explicit HalResult(std::string errorMessage, bool unsupported)
           : mValue(), mErrorMessage(std::move(errorMessage)), mUnsupported(unsupported) {}
 };
@@ -158,7 +180,15 @@
     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<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>
+    createHintSessionWithConfig(int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
+                                int64_t durationNanos,
+                                aidl::android::hardware::power::SessionTag tag,
+                                aidl::android::hardware::power::SessionConfig* config) = 0;
     virtual HalResult<int64_t> getHintSessionPreferredRate() = 0;
+    virtual HalResult<aidl::android::hardware::power::ChannelConfig> getSessionChannel(int tgid,
+                                                                                       int uid) = 0;
+    virtual HalResult<void> closeSessionChannel(int tgid, int uid) = 0;
 };
 
 // Empty Power HAL wrapper that ignores all api calls.
@@ -173,11 +203,22 @@
     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;
+    HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>
+    createHintSessionWithConfig(int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
+                                int64_t durationNanos,
+                                aidl::android::hardware::power::SessionTag tag,
+                                aidl::android::hardware::power::SessionConfig* config) override;
     HalResult<int64_t> getHintSessionPreferredRate() override;
+    HalResult<aidl::android::hardware::power::ChannelConfig> getSessionChannel(int tgid,
+                                                                               int uid) override;
+    HalResult<void> closeSessionChannel(int tgid, int uid) override;
+
+protected:
+    virtual const char* getUnsupportedMessage();
 };
 
 // Wrapper for the HIDL Power HAL v1.0.
-class HidlHalWrapperV1_0 : public HalWrapper {
+class HidlHalWrapperV1_0 : public EmptyHalWrapper {
 public:
     explicit HidlHalWrapperV1_0(sp<hardware::power::V1_0::IPower> handleV1_0)
           : mHandleV1_0(std::move(handleV1_0)) {}
@@ -186,14 +227,11 @@
     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;
-    HalResult<int64_t> getHintSessionPreferredRate() override;
 
 protected:
     const sp<hardware::power::V1_0::IPower> mHandleV1_0;
     virtual HalResult<void> sendPowerHint(hardware::power::V1_3::PowerHint hintId, uint32_t data);
+    const char* getUnsupportedMessage();
 
 private:
     HalResult<void> setInteractive(bool enabled);
@@ -238,7 +276,7 @@
 };
 
 // Wrapper for the AIDL Power HAL.
-class AidlHalWrapper : public HalWrapper {
+class AidlHalWrapper : public EmptyHalWrapper {
 public:
     explicit AidlHalWrapper(std::shared_ptr<aidl::android::hardware::power::IPower> handle)
           : mHandle(std::move(handle)) {}
@@ -250,7 +288,19 @@
     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;
+    HalResult<std::shared_ptr<aidl::android::hardware::power::IPowerHintSession>>
+    createHintSessionWithConfig(int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
+                                int64_t durationNanos,
+                                aidl::android::hardware::power::SessionTag tag,
+                                aidl::android::hardware::power::SessionConfig* config) override;
+
     HalResult<int64_t> getHintSessionPreferredRate() override;
+    HalResult<aidl::android::hardware::power::ChannelConfig> getSessionChannel(int tgid,
+                                                                               int uid) override;
+    HalResult<void> closeSessionChannel(int tgid, int uid) override;
+
+protected:
+    const char* getUnsupportedMessage() override;
 
 private:
     // Control access to the boost and mode supported arrays.
@@ -274,5 +324,3 @@
 }; // namespace power
 
 }; // namespace android
-
-#endif // ANDROID_POWERHALWRAPPER_H
diff --git a/include/private/performance_hint_private.h b/include/private/performance_hint_private.h
index d50c5f8..d8f9db4 100644
--- a/include/private/performance_hint_private.h
+++ b/include/private/performance_hint_private.h
@@ -53,6 +53,26 @@
      * CPU resources to what was used previously, and must wake up if inactive.
      */
     CPU_LOAD_RESUME = 3,
+
+    /**
+     * This hint indicates an increase in GPU workload intensity. It means that
+     * this hint session needs extra GPU resources to meet the target duration.
+     * This hint must be sent before reporting the actual duration to the session.
+     */
+    GPU_LOAD_UP = 5,
+
+    /**
+     * This hint indicates a decrease in GPU workload intensity. It means that
+     * this hint session can reduce GPU resources and still meet the target duration.
+     */
+    GPU_LOAD_DOWN = 6,
+
+    /*
+     * This hint indicates an upcoming GPU workload that is completely changed and
+     * unknown. It means that the hint session should reset GPU resources to a known
+     * baseline to prepare for an arbitrary load, and must wake up if inactive.
+     */
+    GPU_LOAD_RESET = 7,
 };
 
 /**