universal7885: Remove useless stuffs

Also reorganize

universal7885-common/bin/hardware/samsung/power-libperfmgr/Android.bp

@@ -0,0 +1,45 @@
+//
+// Copyright (C) 2018 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.
+
+soong_namespace {
+    imports: [
+        "hardware/google/pixel",
+        "hardware/google/interfaces",
+    ],
+}
+
+cc_binary {
+    name: "android.hardware.power-service.samsung-libperfmgr",
+    relative_install_path: "hw",
+    init_rc: ["android.hardware.power-service.samsung-libperfmgr.rc"],
+    vintf_fragments: ["android.hardware.power-service.samsung.xml"],
+    vendor: true,
+    shared_libs: [
+        "android.hardware.power-V1-ndk_platform",
+        "libbase",
+        "libcutils",
+        "liblog",
+        "libutils",
+        "libbinder_ndk",
+        "libperfmgr",
+        "pixel-power-ext-V1-ndk_platform",
+    ],
+    srcs: [
+        "service.cpp",
+        "Power.cpp",
+        "PowerExt.cpp",
+        "InteractionHandler.cpp"
+    ],
+}

universal7885-common/bin/hardware/samsung/power-libperfmgr/InteractionHandler.cpp

@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "android.hardware.power@-service.samsung-libperfmgr"
+#define ATRACE_TAG (ATRACE_TAG_POWER | ATRACE_TAG_HAL)
+
+#include <fcntl.h>
+#include <memory>
+#include <poll.h>
+#include <sys/eventfd.h>
+#include <time.h>
+#include <unistd.h>
+#include <utils/Log.h>
+#include <utils/Trace.h>
+
+#include "InteractionHandler.h"
+
+#define MAX_LENGTH 64
+
+#define MSINSEC 1000L
+#define USINMS 1000000L
+
+static const std::vector<std::string> fb_idle_patch = {
+    "/sys/class/drm/card0/device/idle_state",
+    "/sys/class/graphics/fb0/idle_state"};
+
+InteractionHandler::InteractionHandler(
+    std::shared_ptr<HintManager> const &hint_manager)
+    : mState(INTERACTION_STATE_UNINITIALIZED), mWaitMs(100),
+      mMinDurationMs(1400), mMaxDurationMs(5650), mDurationMs(0),
+      mHintManager(hint_manager) {}
+
+InteractionHandler::~InteractionHandler() { Exit(); }
+
+static int fb_idle_open(void) {
+  int fd;
+  for (auto &path : fb_idle_patch) {
+    fd = open(path.c_str(), O_RDONLY);
+    if (fd >= 0)
+      return fd;
+  }
+  ALOGE("Unable to open fb idle state path (%d)", errno);
+  return -1;
+}
+
+bool InteractionHandler::Init() {
+  std::lock_guard<std::mutex> lk(mLock);
+
+  if (mState != INTERACTION_STATE_UNINITIALIZED)
+    return true;
+
+  mIdleFd = fb_idle_open();
+
+  mEventFd = eventfd(0, EFD_NONBLOCK);
+  if (mEventFd < 0) {
+    ALOGE("Unable to create event fd (%d)", errno);
+    if (mIdleFd >= 0) {
+      close(mIdleFd);
+    }
+    return false;
+  }
+
+  mState = INTERACTION_STATE_IDLE;
+  mThread = std::unique_ptr<std::thread>(
+      new std::thread(&InteractionHandler::Routine, this));
+
+  return true;
+}
+
+void InteractionHandler::Exit() {
+  std::unique_lock<std::mutex> lk(mLock);
+  if (mState == INTERACTION_STATE_UNINITIALIZED)
+    return;
+
+  AbortWaitLocked();
+  mState = INTERACTION_STATE_UNINITIALIZED;
+  lk.unlock();
+
+  mCond.notify_all();
+  mThread->join();
+
+  close(mEventFd);
+  if (mIdleFd >= 0) {
+    close(mIdleFd);
+  }
+}
+
+void InteractionHandler::PerfLock() {
+  ALOGV("%s: acquiring perf lock", __func__);
+  if (!mHintManager->DoHint("INTERACTION")) {
+    ALOGE("%s: do hint INTERACTION failed", __func__);
+  }
+  ATRACE_INT("interaction_lock", 1);
+}
+
+void InteractionHandler::PerfRel() {
+  ALOGV("%s: releasing perf lock", __func__);
+  if (!mHintManager->EndHint("INTERACTION")) {
+    ALOGE("%s: end hint INTERACTION failed", __func__);
+  }
+  ATRACE_INT("interaction_lock", 0);
+}
+
+size_t InteractionHandler::CalcTimespecDiffMs(struct timespec start,
+                                              struct timespec end) {
+  size_t diff_in_us = 0;
+  diff_in_us += (end.tv_sec - start.tv_sec) * MSINSEC;
+  diff_in_us += (end.tv_nsec - start.tv_nsec) / USINMS;
+  return diff_in_us;
+}
+
+void InteractionHandler::Acquire(int32_t duration) {
+  ATRACE_CALL();
+
+  std::lock_guard<std::mutex> lk(mLock);
+  if (mState == INTERACTION_STATE_UNINITIALIZED) {
+    ALOGW("%s: called while uninitialized", __func__);
+    return;
+  }
+
+  int inputDuration = duration + 650;
+  int finalDuration;
+  if (inputDuration > mMaxDurationMs)
+    finalDuration = mMaxDurationMs;
+  else if (inputDuration > mMinDurationMs)
+    finalDuration = inputDuration;
+  else
+    finalDuration = mMinDurationMs;
+
+  struct timespec cur_timespec;
+  clock_gettime(CLOCK_MONOTONIC, &cur_timespec);
+  if (mState != INTERACTION_STATE_IDLE && finalDuration <= mDurationMs) {
+    size_t elapsed_time = CalcTimespecDiffMs(mLastTimespec, cur_timespec);
+    // don't hint if previous hint's duration covers this hint's duration
+    if (elapsed_time <= (mDurationMs - finalDuration)) {
+      ALOGV("%s: Previous duration (%d) cover this (%d) elapsed: %lld",
+            __func__, static_cast<int>(mDurationMs),
+            static_cast<int>(finalDuration),
+            static_cast<long long>(elapsed_time));
+      return;
+    }
+  }
+  mLastTimespec = cur_timespec;
+  mDurationMs = finalDuration;
+
+  ALOGV("%s: input: %d final duration: %d", __func__, duration, finalDuration);
+
+  if (mState == INTERACTION_STATE_WAITING)
+    AbortWaitLocked();
+  else if (mState == INTERACTION_STATE_IDLE)
+    PerfLock();
+
+  mState = INTERACTION_STATE_INTERACTION;
+  mCond.notify_one();
+}
+
+void InteractionHandler::Release() {
+  std::lock_guard<std::mutex> lk(mLock);
+  if (mState == INTERACTION_STATE_WAITING) {
+    ATRACE_CALL();
+    PerfRel();
+    mState = INTERACTION_STATE_IDLE;
+  } else {
+    // clear any wait aborts pending in event fd
+    uint64_t val;
+    ssize_t ret = read(mEventFd, &val, sizeof(val));
+
+    ALOGW_IF(ret < 0, "%s: failed to clear eventfd (%zd, %d)", __func__, ret,
+             errno);
+  }
+}
+
+// should be called while locked
+void InteractionHandler::AbortWaitLocked() {
+  uint64_t val = 1;
+  ssize_t ret = write(mEventFd, &val, sizeof(val));
+  if (ret != sizeof(val))
+    ALOGW("Unable to write to event fd (%zd)", ret);
+}
+
+void InteractionHandler::WaitForIdle(int32_t wait_ms, int32_t timeout_ms) {
+  char data[MAX_LENGTH];
+  ssize_t ret;
+  struct pollfd pfd[2];
+
+  ATRACE_CALL();
+
+  ALOGV("%s: wait:%d timeout:%d", __func__, wait_ms, timeout_ms);
+
+  pfd[0].fd = mEventFd;
+  pfd[0].events = POLLIN;
+  pfd[1].fd = mIdleFd;
+  pfd[1].events = POLLPRI | POLLERR;
+
+  ret = poll(pfd, 1, wait_ms);
+  if (ret > 0) {
+    ALOGV("%s: wait aborted", __func__);
+    return;
+  } else if (ret < 0) {
+    ALOGE("%s: error in poll while waiting", __func__);
+    return;
+  }
+
+  if (mIdleFd < 0) {
+    ret = poll(pfd, 1, timeout_ms);
+    if (ret > 0) {
+      ALOGV("%s: wait for duration aborted", __func__);
+      return;
+    } else if (ret < 0) {
+      ALOGE("%s: Error on waiting for duration (%zd)", __func__, ret);
+      return;
+    }
+    return;
+  }
+
+  ret = pread(mIdleFd, data, sizeof(data), 0);
+  if (!ret) {
+    ALOGE("%s: Unexpected EOF!", __func__);
+    return;
+  }
+
+  if (!strncmp(data, "idle", 4)) {
+    ALOGV("%s: already idle", __func__);
+    return;
+  }
+
+  ret = poll(pfd, 2, timeout_ms);
+  if (ret < 0)
+    ALOGE("%s: Error on waiting for idle (%zd)", __func__, ret);
+  else if (ret == 0)
+    ALOGV("%s: timed out waiting for idle", __func__);
+  else if (pfd[0].revents)
+    ALOGV("%s: wait for idle aborted", __func__);
+  else if (pfd[1].revents)
+    ALOGV("%s: idle detected", __func__);
+}
+
+void InteractionHandler::Routine() {
+  std::unique_lock<std::mutex> lk(mLock, std::defer_lock);
+
+  while (true) {
+    lk.lock();
+    mCond.wait(lk, [&] { return mState != INTERACTION_STATE_IDLE; });
+    if (mState == INTERACTION_STATE_UNINITIALIZED)
+      return;
+    mState = INTERACTION_STATE_WAITING;
+    lk.unlock();
+
+    WaitForIdle(mWaitMs, mDurationMs);
+    Release();
+  }
+}

universal7885-common/bin/hardware/samsung/power-libperfmgr/InteractionHandler.h

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef POWER_LIBPERFMGR_INTERACTIONHANDLER_H_
+#define POWER_LIBPERFMGR_INTERACTIONHANDLER_H_
+
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <thread>
+
+#include <perfmgr/HintManager.h>
+
+using ::android::perfmgr::HintManager;
+
+enum interaction_state {
+  INTERACTION_STATE_UNINITIALIZED,
+  INTERACTION_STATE_IDLE,
+  INTERACTION_STATE_INTERACTION,
+  INTERACTION_STATE_WAITING,
+};
+
+class InteractionHandler {
+public:
+  InteractionHandler(std::shared_ptr<HintManager> const &hint_manager);
+  ~InteractionHandler();
+  bool Init();
+  void Exit();
+  void Acquire(int32_t duration);
+
+private:
+  void Release();
+  void WaitForIdle(int32_t wait_ms, int32_t timeout_ms);
+  void AbortWaitLocked();
+  void Routine();
+
+  void PerfLock();
+  void PerfRel();
+
+  size_t CalcTimespecDiffMs(struct timespec start, struct timespec end);
+
+  enum interaction_state mState;
+
+  int mIdleFd;
+  int mEventFd;
+
+  int32_t mWaitMs;
+  int32_t mMinDurationMs;
+  int32_t mMaxDurationMs;
+  int32_t mDurationMs;
+
+  struct timespec mLastTimespec;
+
+  std::unique_ptr<std::thread> mThread;
+  std::mutex mLock;
+  std::condition_variable mCond;
+  std::shared_ptr<HintManager> mHintManager;
+};
+
+#endif // POWER_LIBPERFMGR_INTERACTIONHANDLER_H_

universal7885-common/bin/hardware/samsung/power-libperfmgr/Power.cpp

@@ -0,0 +1,262 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define ATRACE_TAG (ATRACE_TAG_POWER | ATRACE_TAG_HAL)
+#define LOG_TAG "android.hardware.power-service.samsung-libperfmgr"
+
+#include "Power.h"
+
+#include <mutex>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+
+#include <utils/Log.h>
+#include <utils/Trace.h>
+
+namespace aidl {
+namespace google {
+namespace hardware {
+namespace power {
+namespace impl {
+namespace pixel {
+
+constexpr char kPowerHalStateProp[] = "vendor.powerhal.state";
+constexpr char kPowerHalAudioProp[] = "vendor.powerhal.audio";
+constexpr char kPowerHalRenderingProp[] = "vendor.powerhal.rendering";
+
+Power::Power(std::shared_ptr<HintManager> hm)
+    : mHintManager(hm), mInteractionHandler(nullptr), mVRModeOn(false),
+      mSustainedPerfModeOn(false) {
+  mInteractionHandler = std::make_unique<InteractionHandler>(mHintManager);
+  mInteractionHandler->Init();
+
+  std::string state = ::android::base::GetProperty(kPowerHalStateProp, "");
+  if (state == "SUSTAINED_PERFORMANCE") {
+    ALOGI("Initialize with SUSTAINED_PERFORMANCE on");
+    mHintManager->DoHint("SUSTAINED_PERFORMANCE");
+    mSustainedPerfModeOn = true;
+  } else if (state == "VR") {
+    ALOGI("Initialize with VR on");
+    mHintManager->DoHint(state);
+    mVRModeOn = true;
+  } else if (state == "VR_SUSTAINED_PERFORMANCE") {
+    ALOGI("Initialize with SUSTAINED_PERFORMANCE and VR on");
+    mHintManager->DoHint("VR_SUSTAINED_PERFORMANCE");
+    mSustainedPerfModeOn = true;
+    mVRModeOn = true;
+  } else {
+    ALOGI("Initialize PowerHAL");
+  }
+
+  state = ::android::base::GetProperty(kPowerHalAudioProp, "");
+  if (state == "AUDIO_STREAMING_LOW_LATENCY") {
+    ALOGI("Initialize with AUDIO_LOW_LATENCY on");
+    mHintManager->DoHint(state);
+  }
+
+  state = ::android::base::GetProperty(kPowerHalRenderingProp, "");
+  if (state == "EXPENSIVE_RENDERING") {
+    ALOGI("Initialize with EXPENSIVE_RENDERING on");
+    mHintManager->DoHint("EXPENSIVE_RENDERING");
+  }
+
+  // Now start to take powerhint
+  ALOGI("PowerHAL ready to process hints");
+}
+
+ndk::ScopedAStatus Power::setMode(Mode type, bool enabled) {
+  LOG(DEBUG) << "Power setMode: " << toString(type) << " to: " << enabled;
+  ATRACE_INT(toString(type).c_str(), enabled);
+  switch (type) {
+  case Mode::LOW_POWER:
+    if (enabled) {
+      mHintManager->DoHint(toString(type));
+    } else {
+      mHintManager->EndHint(toString(type));
+    }
+    break;
+  case Mode::SUSTAINED_PERFORMANCE:
+    if (enabled && !mSustainedPerfModeOn) {
+      if (!mVRModeOn) { // Sustained mode only.
+        mHintManager->DoHint("SUSTAINED_PERFORMANCE");
+      } else { // Sustained + VR mode.
+        mHintManager->EndHint("VR");
+        mHintManager->DoHint("VR_SUSTAINED_PERFORMANCE");
+      }
+      mSustainedPerfModeOn = true;
+    } else if (!enabled && mSustainedPerfModeOn) {
+      mHintManager->EndHint("VR_SUSTAINED_PERFORMANCE");
+      mHintManager->EndHint("SUSTAINED_PERFORMANCE");
+      if (mVRModeOn) { // Switch back to VR Mode.
+        mHintManager->DoHint("VR");
+      }
+      mSustainedPerfModeOn = false;
+    }
+    break;
+  case Mode::VR:
+    if (enabled && !mVRModeOn) {
+      if (!mSustainedPerfModeOn) { // VR mode only.
+        mHintManager->DoHint("VR");
+      } else { // Sustained + VR mode.
+        mHintManager->EndHint("SUSTAINED_PERFORMANCE");
+        mHintManager->DoHint("VR_SUSTAINED_PERFORMANCE");
+      }
+      mVRModeOn = true;
+    } else if (!enabled && mVRModeOn) {
+      mHintManager->EndHint("VR_SUSTAINED_PERFORMANCE");
+      mHintManager->EndHint("VR");
+      if (mSustainedPerfModeOn) { // Switch back to sustained Mode.
+        mHintManager->DoHint("SUSTAINED_PERFORMANCE");
+      }
+      mVRModeOn = false;
+    }
+    break;
+  case Mode::LAUNCH:
+    if (mVRModeOn || mSustainedPerfModeOn) {
+      break;
+    }
+    [[fallthrough]];
+  case Mode::DOUBLE_TAP_TO_WAKE:
+    [[fallthrough]];
+  case Mode::FIXED_PERFORMANCE:
+    [[fallthrough]];
+  case Mode::EXPENSIVE_RENDERING:
+    [[fallthrough]];
+  case Mode::INTERACTIVE:
+    [[fallthrough]];
+  case Mode::DEVICE_IDLE:
+    [[fallthrough]];
+  case Mode::DISPLAY_INACTIVE:
+    [[fallthrough]];
+  case Mode::AUDIO_STREAMING_LOW_LATENCY:
+    [[fallthrough]];
+  case Mode::CAMERA_STREAMING_SECURE:
+    [[fallthrough]];
+  case Mode::CAMERA_STREAMING_LOW:
+    [[fallthrough]];
+  case Mode::CAMERA_STREAMING_MID:
+    [[fallthrough]];
+  case Mode::CAMERA_STREAMING_HIGH:
+    [[fallthrough]];
+  default:
+    if (enabled) {
+      mHintManager->DoHint(toString(type));
+    } else {
+      mHintManager->EndHint(toString(type));
+    }
+    break;
+  }
+
+  return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Power::isModeSupported(Mode type, bool *_aidl_return) {
+  bool supported = mHintManager->IsHintSupported(toString(type));
+  switch (type) {
+  case Mode::LOW_POWER: // LOW_POWER handled insides PowerHAL specifically
+    supported = true;
+    break;
+  case Mode::DOUBLE_TAP_TO_WAKE:
+    supported = true;
+    break;
+  case Mode::INTERACTIVE:
+    supported = true;
+    break;
+  default:
+    break;
+  }
+
+  LOG(INFO) << "Power mode " << toString(type)
+            << " isModeSupported: " << supported;
+  *_aidl_return = supported;
+  return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Power::setBoost(Boost type, int32_t durationMs) {
+  LOG(DEBUG) << "Power setBoost: " << toString(type)
+             << " duration: " << durationMs;
+  ATRACE_INT(toString(type).c_str(), durationMs);
+  switch (type) {
+  case Boost::INTERACTION:
+    if (mVRModeOn || mSustainedPerfModeOn) {
+      break;
+    }
+    mInteractionHandler->Acquire(durationMs);
+    break;
+  case Boost::DISPLAY_UPDATE_IMMINENT:
+    [[fallthrough]];
+  case Boost::ML_ACC:
+    [[fallthrough]];
+  case Boost::AUDIO_LAUNCH:
+    [[fallthrough]];
+  case Boost::CAMERA_LAUNCH:
+    [[fallthrough]];
+  case Boost::CAMERA_SHOT:
+    [[fallthrough]];
+  default:
+    if (mVRModeOn || mSustainedPerfModeOn) {
+      break;
+    }
+    if (durationMs > 0) {
+      mHintManager->DoHint(toString(type),
+                           std::chrono::milliseconds(durationMs));
+    } else if (durationMs == 0) {
+      mHintManager->DoHint(toString(type));
+    } else {
+      mHintManager->EndHint(toString(type));
+    }
+    break;
+  }
+
+  return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Power::isBoostSupported(Boost type, bool *_aidl_return) {
+  bool supported = mHintManager->IsHintSupported(toString(type));
+  LOG(INFO) << "Power boost " << toString(type)
+            << " isBoostSupported: " << supported;
+  *_aidl_return = supported;
+  return ndk::ScopedAStatus::ok();
+}
+
+constexpr const char *boolToString(bool b) { return b ? "true" : "false"; }
+
+binder_status_t Power::dump(int fd, const char **, uint32_t) {
+  std::string buf(::android::base::StringPrintf(
+      "HintManager Running: %s\n"
+      "VRMode: %s\n"
+      "SustainedPerformanceMode: %s\n",
+      boolToString(mHintManager->IsRunning()), boolToString(mVRModeOn),
+      boolToString(mSustainedPerfModeOn)));
+  // Dump nodes through libperfmgr
+  mHintManager->DumpToFd(fd);
+  if (!::android::base::WriteStringToFd(buf, fd)) {
+    PLOG(ERROR) << "Failed to dump state to fd";
+  }
+  fsync(fd);
+  return STATUS_OK;
+}
+
+} // namespace pixel
+} // namespace impl
+} // namespace power
+} // namespace hardware
+} // namespace google
+} // namespace aidl

universal7885-common/bin/hardware/samsung/power-libperfmgr/Power.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <atomic>
+#include <memory>
+#include <thread>
+
+#include <aidl/android/hardware/power/BnPower.h>
+#include <perfmgr/HintManager.h>
+
+#include "InteractionHandler.h"
+
+namespace aidl {
+namespace google {
+namespace hardware {
+namespace power {
+namespace impl {
+namespace pixel {
+
+using ::InteractionHandler;
+using ::aidl::android::hardware::power::Boost;
+using ::aidl::android::hardware::power::Mode;
+using ::android::perfmgr::HintManager;
+
+class Power : public ::aidl::android::hardware::power::BnPower {
+public:
+  Power(std::shared_ptr<HintManager> hm);
+  ndk::ScopedAStatus setMode(Mode type, bool enabled) override;
+  ndk::ScopedAStatus isModeSupported(Mode type, bool *_aidl_return) override;
+  ndk::ScopedAStatus setBoost(Boost type, int32_t durationMs) override;
+  ndk::ScopedAStatus isBoostSupported(Boost type, bool *_aidl_return) override;
+  binder_status_t dump(int fd, const char **args, uint32_t numArgs) override;
+
+private:
+  std::shared_ptr<HintManager> mHintManager;
+  std::unique_ptr<InteractionHandler> mInteractionHandler;
+  std::atomic<bool> mVRModeOn;
+  std::atomic<bool> mSustainedPerfModeOn;
+};
+
+} // namespace pixel
+} // namespace impl
+} // namespace power
+} // namespace hardware
+} // namespace google
+} // namespace aidl

universal7885-common/bin/hardware/samsung/power-libperfmgr/PowerExt.cpp

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define ATRACE_TAG (ATRACE_TAG_POWER | ATRACE_TAG_HAL)
+#define LOG_TAG "android.hardware.power-service.samsung.ext-libperfmgr"
+
+#include "PowerExt.h"
+
+#include <mutex>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+
+#include <utils/Log.h>
+#include <utils/Trace.h>
+
+namespace aidl {
+namespace google {
+namespace hardware {
+namespace power {
+namespace impl {
+namespace pixel {
+
+ndk::ScopedAStatus PowerExt::setMode(const std::string &mode, bool enabled) {
+  LOG(DEBUG) << "PowerExt setMode: " << mode << " to: " << enabled;
+  ATRACE_INT(mode.c_str(), enabled);
+
+  if (enabled) {
+    mHintManager->DoHint(mode);
+  } else {
+    mHintManager->EndHint(mode);
+  }
+
+  return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus PowerExt::isModeSupported(const std::string &mode,
+                                             bool *_aidl_return) {
+  bool supported = mHintManager->IsHintSupported(mode);
+  LOG(INFO) << "PowerExt mode " << mode << " isModeSupported: " << supported;
+  *_aidl_return = supported;
+  return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus PowerExt::setBoost(const std::string &boost,
+                                      int32_t durationMs) {
+  LOG(DEBUG) << "PowerExt setBoost: " << boost << " duration: " << durationMs;
+  ATRACE_INT(boost.c_str(), durationMs);
+
+  if (durationMs > 0) {
+    mHintManager->DoHint(boost, std::chrono::milliseconds(durationMs));
+  } else if (durationMs == 0) {
+    mHintManager->DoHint(boost);
+  } else {
+    mHintManager->EndHint(boost);
+  }
+
+  return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus PowerExt::isBoostSupported(const std::string &boost,
+                                              bool *_aidl_return) {
+  bool supported = mHintManager->IsHintSupported(boost);
+  LOG(INFO) << "PowerExt boost " << boost << " isBoostSupported: " << supported;
+  *_aidl_return = supported;
+  return ndk::ScopedAStatus::ok();
+}
+
+} // namespace pixel
+} // namespace impl
+} // namespace power
+} // namespace hardware
+} // namespace google
+} // namespace aidl

universal7885-common/bin/hardware/samsung/power-libperfmgr/PowerExt.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <atomic>
+#include <memory>
+#include <thread>
+
+#include <aidl/google/hardware/power/extension/pixel/BnPowerExt.h>
+#include <perfmgr/HintManager.h>
+
+namespace aidl {
+namespace google {
+namespace hardware {
+namespace power {
+namespace impl {
+namespace pixel {
+
+using ::android::perfmgr::HintManager;
+
+class PowerExt
+    : public ::aidl::google::hardware::power::extension::pixel::BnPowerExt {
+public:
+  PowerExt(std::shared_ptr<HintManager> hm) : mHintManager(hm) {}
+  ndk::ScopedAStatus setMode(const std::string &mode, bool enabled) override;
+  ndk::ScopedAStatus isModeSupported(const std::string &mode,
+                                     bool *_aidl_return) override;
+  ndk::ScopedAStatus setBoost(const std::string &boost,
+                              int32_t durationMs) override;
+  ndk::ScopedAStatus isBoostSupported(const std::string &boost,
+                                      bool *_aidl_return) override;
+
+private:
+  std::shared_ptr<HintManager> mHintManager;
+};
+
+} // namespace pixel
+} // namespace impl
+} // namespace power
+} // namespace hardware
+} // namespace google
+} // namespace aidl

universal7885-common/bin/hardware/samsung/power-libperfmgr/android.hardware.power-service.samsung-libperfmgr.rc

@@ -0,0 +1,28 @@
+service vendor.power-hal-aidl /vendor/bin/hw/android.hardware.power-service.samsung-libperfmgr
+    class hal
+    user root
+    group system radio
+    priority -20
+
+on late-fs
+     start vendor.power-hal-aidl
+
+# restart powerHAL when framework died
+on property:init.svc.zygote=restarting && property:vendor.powerhal.state=*
+    setprop vendor.powerhal.state ""
+    setprop vendor.powerhal.audio ""
+    setprop vendor.powerhal.rendering ""
+    restart vendor.power-hal-aidl
+
+# Clean up after b/163539793 resolved
+on property:vendor.powerhal.dalvik.vm.dex2oat-threads=*
+    setprop dalvik.vm.dex2oat-threads ${vendor.powerhal.dalvik.vm.dex2oat-threads}
+    setprop dalvik.vm.restore-dex2oat-threads ${vendor.powerhal.dalvik.vm.dex2oat-threads}
+
+on property:vendor.powerhal.dalvik.vm.dex2oat-cpu-set=*
+    setprop dalvik.vm.dex2oat-cpu-set ${vendor.powerhal.dalvik.vm.dex2oat-cpu-set}
+    setprop dalvik.vm.restore-dex2oat-cpu-set ${vendor.powerhal.dalvik.vm.dex2oat-cpu-set}
+
+# initialize powerHAL when boot is completed
+on property:sys.boot_completed=1
+   setprop vendor.powerhal.init 1

universal7885-common/bin/hardware/samsung/power-libperfmgr/android.hardware.power-service.samsung.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<manifest version="1.0" type="device">
+	<hal format="aidl" override="true">
+		<name>android.hardware.power</name>
+		<fqname>IPower/default</fqname>
+	</hal>
+</manifest>

universal7885-common/bin/hardware/samsung/power-libperfmgr/service.cpp

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "android.hardware.power-service.samsung-libperfmgr"
+
+#include <thread>
+
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+
+#include "Power.h"
+#include "PowerExt.h"
+
+using aidl::google::hardware::power::impl::pixel::Power;
+using aidl::google::hardware::power::impl::pixel::PowerExt;
+using ::android::perfmgr::HintManager;
+
+constexpr char kPowerHalConfigPath[] = "/vendor/etc/powerhint.json";
+constexpr char kPowerHalInitProp[] = "vendor.powerhal.init";
+
+int main() {
+  LOG(INFO) << "Pixel Power HAL AIDL Service with Extension is starting.";
+
+  // Parse config but do not start the looper
+  std::shared_ptr<HintManager> hm =
+      HintManager::GetFromJSON(kPowerHalConfigPath, false);
+  if (!hm) {
+    LOG(FATAL) << "Invalid config: " << kPowerHalConfigPath;
+  }
+
+  // single thread
+  ABinderProcess_setThreadPoolMaxThreadCount(0);
+
+  // core service
+  std::shared_ptr<Power> pw = ndk::SharedRefBase::make<Power>(hm);
+  ndk::SpAIBinder pwBinder = pw->asBinder();
+
+  // extension service
+  std::shared_ptr<PowerExt> pwExt = ndk::SharedRefBase::make<PowerExt>(hm);
+
+  // attach the extension to the same binder we will be registering
+  CHECK(STATUS_OK ==
+        AIBinder_setExtension(pwBinder.get(), pwExt->asBinder().get()));
+
+  const std::string instance = std::string() + Power::descriptor + "/default";
+  binder_status_t status =
+      AServiceManager_addService(pw->asBinder().get(), instance.c_str());
+  CHECK(status == STATUS_OK);
+  LOG(INFO) << "Pixel Power HAL AIDL Service with Extension is started.";
+
+  std::thread initThread([&]() {
+    ::android::base::WaitForProperty(kPowerHalInitProp, "1");
+    hm->Start();
+  });
+  initThread.detach();
+
+  ABinderProcess_joinThreadPool();
+
+  // should not reach
+  LOG(ERROR) << "Pixel Power HAL AIDL Service with Extension just died.";
+  return EXIT_FAILURE;
+}