PowerManagerService启动-Android12
Posted xhBruce
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PowerManagerService启动-android12
android12-release
1. 在SystemServer的startBootstrapServices中启动
mSystemServiceManager.startService(PowerManagerService.class)先调用CameraServiceProxy构造方法constructor.newInstance(mContext)，在调用CameraServiceProxy的service.onStart()方法mPowerManagerService.systemReady()获取各类本地服务、远程服务以及相关联的功能类；注册SettingsObserver监听 等。
frameworks/base/services/java/com/android/server/SystemServer.java
private void startBootstrapServices(@NonNull TimingsTraceAndSlog t)
// ... ...
t.traceBegin("StartPowerManager");
mPowerManagerService = mSystemServiceManager.startService(PowerManagerService.class);
t.traceEnd();
// ... ...
private void startOtherServices(@NonNull TimingsTraceAndSlog t)
// ... ...
t.traceBegin("MakePowerManagerServiceReady");
try
// TODO: use boot phase
mPowerManagerService.systemReady(mActivityManagerService.getAppOpsService());
catch (Throwable e)
reportWtf("making Power Manager Service ready", e);
t.traceEnd();
// ... ...
2. PowerManagerService初始化并调用onStart()方法
2.1 初始化
mBinderService = new BinderService()作为Binder IPC的服务端mLocalService = new LocalService()为同进程的其它模块提供支持mNativeWrapper = injector.createNativeWrapper()是对调用native方法提供的一层包装- 了解Native层：
mNativeWrapper.nativeInit(this);native方法初始化并连接HAL层PowerHalController.init()
mNativeWrapper.nativeSetAutoSuspend(false);关闭自动休眠
mNativeWrapper.nativeSetPowerMode(Mode.INTERACTIVE, true);保持屏幕点亮
mNativeWrapper.nativeSetPowerMode(Mode.DOUBLE_TAP_TO_WAKE, false);禁用双击屏幕唤醒系统的功能
frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java
PowerManagerService(Context context, Injector injector)
super(context);
mContext = context;
mBinderService = new BinderService();
mLocalService = new LocalService();
mNativeWrapper = injector.createNativeWrapper();
mSystemProperties = injector.createSystemPropertiesWrapper();
mClock = injector.createClock();
mInjector = injector;
mHandlerThread = new ServiceThread(TAG,
Process.THREAD_PRIORITY_DISPLAY, false /*allowIo*/);
mHandlerThread.start();
mHandler = injector.createHandler(mHandlerThread.getLooper(),
new PowerManagerHandlerCallback());
mConstants = new Constants(mHandler);
mAmbientDisplayConfiguration = mInjector.createAmbientDisplayConfiguration(context);
mAmbientDisplaySuppressionController =
mInjector.createAmbientDisplaySuppressionController(context);
mAttentionDetector = new AttentionDetector(this::onUserAttention, mLock);
mFaceDownDetector = new FaceDownDetector(this::onFlip);
mBatterySavingStats = new BatterySavingStats(mLock);
mBatterySaverPolicy =
mInjector.createBatterySaverPolicy(mLock, mContext, mBatterySavingStats);
mBatterySaverController = mInjector.createBatterySaverController(mLock, mContext,
mBatterySaverPolicy, mBatterySavingStats);
mBatterySaverStateMachine = mInjector.createBatterySaverStateMachine(mLock, mContext,
mBatterySaverController);
mInattentiveSleepWarningOverlayController =
mInjector.createInattentiveSleepWarningController();
// Save brightness values:
// Get float values from config.
// Store float if valid
// Otherwise, get int values and convert to float and then store.
final float min = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessSettingMinimumFloat);
final float max = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessSettingMaximumFloat);
final float def = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessSettingDefaultFloat);
final float doze = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessDozeFloat);
final float dim = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessDimFloat);
if (min == INVALID_BRIGHTNESS_IN_CONFIG || max == INVALID_BRIGHTNESS_IN_CONFIG
|| def == INVALID_BRIGHTNESS_IN_CONFIG)
mScreenBrightnessMinimum = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessSettingMinimum));
mScreenBrightnessMaximum = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessSettingMaximum));
mScreenBrightnessDefault = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessSettingDefault));
else
mScreenBrightnessMinimum = min;
mScreenBrightnessMaximum = max;
mScreenBrightnessDefault = def;
if (doze == INVALID_BRIGHTNESS_IN_CONFIG)
mScreenBrightnessDoze = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessDoze));
else
mScreenBrightnessDoze = doze;
if (dim == INVALID_BRIGHTNESS_IN_CONFIG)
mScreenBrightnessDim = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessDim));
else
mScreenBrightnessDim = dim;
final float vrMin = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessSettingForVrMinimumFloat);
final float vrMax = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessSettingForVrMaximumFloat);
final float vrDef = mContext.getResources().getFloat(com.android.internal.R.dimen
.config_screenBrightnessSettingForVrDefaultFloat);
if (vrMin == INVALID_BRIGHTNESS_IN_CONFIG || vrMax == INVALID_BRIGHTNESS_IN_CONFIG
|| vrDef == INVALID_BRIGHTNESS_IN_CONFIG)
mScreenBrightnessMinimumVr = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessForVrSettingMinimum));
mScreenBrightnessMaximumVr = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessForVrSettingMaximum));
mScreenBrightnessDefaultVr = BrightnessSynchronizer.brightnessIntToFloat(
mContext.getResources().getInteger(com.android.internal.R.integer
.config_screenBrightnessForVrSettingDefault));
else
mScreenBrightnessMinimumVr = vrMin;
mScreenBrightnessMaximumVr = vrMax;
mScreenBrightnessDefaultVr = vrDef;
synchronized (mLock)
mWakeLockSuspendBlocker =
mInjector.createSuspendBlocker(this, "PowerManagerService.WakeLocks");
mDisplaySuspendBlocker =
mInjector.createSuspendBlocker(this, "PowerManagerService.Display");
if (mDisplaySuspendBlocker != null)
mDisplaySuspendBlocker.acquire();
mHoldingDisplaySuspendBlocker = true;
mHalAutoSuspendModeEnabled = false;
mHalInteractiveModeEnabled = true;
mWakefulnessRaw = WAKEFULNESS_AWAKE;
sQuiescent = mSystemProperties.get(SYSTEM_PROPERTY_QUIESCENT, "0").equals("1")
|| InitProperties.userspace_reboot_in_progress().orElse(false);
mNativeWrapper.nativeInit(this);
mNativeWrapper.nativeSetAutoSuspend(false);
mNativeWrapper.nativeSetPowerMode(Mode.INTERACTIVE, true);
mNativeWrapper.nativeSetPowerMode(Mode.DOUBLE_TAP_TO_WAKE, false);
mInjector.invalidateIsInteractiveCaches();
2.2 onStart()方法
publishBinderService()添加名为POWER_SERVICE = "power"的Binder IPC的服务端publishLocalService(PowerManagerInternal.class, mLocalService)添加到LocalServices，为同进程的其它模块提供支持
public void onStart()
publishBinderService(Context.POWER_SERVICE, mBinderService, /* allowIsolated= */ false,
DUMP_FLAG_PRIORITY_DEFAULT | DUMP_FLAG_PRIORITY_CRITICAL);
publishLocalService(PowerManagerInternal.class, mLocalService);
Watchdog.getInstance().addMonitor(this);
Watchdog.getInstance().addThread(mHandler);
3. PowerManagerService.systemReady
- 获取各类本地服务、远程服务以及相关联的功能类，如屏保(DreamManagerInternal)、窗口(WindowManagerPolicy)、电池状态监听服务(BatteryManagerInternal)、屏显服务(DisplayManagerInternal)、背光服务（LightsManager）、无线充电（WirelessChargerDetector)等
mSettingsObserver = new SettingsObserver(mHandler)注册SettingsObserver监听，监听Settings中的值的变化readConfigurationLocked()读取配置文件中的默认值，如 插拔USB是否亮屏 、是否支持屏保 、充电和睡眠时屏保是否激活 、是否支持双击唤醒屏幕 等等updateSettingsLocked()查询Settings中配置的值，如 是否打开屏保、休眠时是否启用屏保、设备在一段时间不活动后进入休眠或者屏保状态的时间等待- 注册广播接收者，监听特定的广播事件，如 电池状态的改变
mContext.registerReceiver(new BatteryReceiver(), filter, null, mHandler)、进入屏保mContext.registerReceiver(new DreamReceiver(), filter, null, mHandler)、切换用户mContext.registerReceiver(new UserSwitchedReceiver(), filter, null, mHandler)、设备物理插槽状态的改变（通常用于监听是否接入了有线充电器）mContext.registerReceiver(new DockReceiver(), filter, null, mHandler)
public void systemReady(IAppOpsService appOps)
synchronized (mLock)
mSystemReady = true;
mAppOps = appOps;
mDreamManager = getLocalService(DreamManagerInternal.class);
mDisplayManagerInternal = getLocalService(DisplayManagerInternal.class);
mPolicy = getLocalService(WindowManagerPolicy.class);
mBatteryManagerInternal = getLocalService(BatteryManagerInternal.class);
mAttentionDetector.systemReady(mContext);
mDisplayGroupPowerStateMapper = mInjector.createDisplayPowerRequestMapper(mLock,
mDisplayManagerInternal, new DisplayGroupPowerChangeListener());
SensorManager sensorManager = new SystemSensorManager(mContext, mHandler.getLooper());
// The notifier runs on the system server's main looper so as not to interfere
// with the animations and other critical functions of the power manager.
mBatteryStats = BatteryStatsService.getService();
mNotifier = mInjector.createNotifier(Looper.getMainLooper(), mContext, mBatteryStats,
mInjector.createSuspendBlocker(this, "PowerManagerService.Broadcasts"),
mPolicy, mFaceDownDetector);
mWirelessChargerDetector = mInjector.createWirelessChargerDetector(sensorManager,
mInjector.createSuspendBlocker(
this, "PowerManagerService.WirelessChargerDetector"),
mHandler);
mSettingsObserver = new SettingsObserver(mHandler);
mLightsManager = getLocalService(LightsManager.class);
mAttentionLight = mLightsManager.getLight(LightsManager.LIGHT_ID_ATTENTION);
// Initialize display power management.
mDisplayManagerInternal.initPowerManagement(
mDisplayPowerCallbacks, mHandler, sensorManager);
try
final ForegroundProfileObserver observer = new ForegroundProfileObserver();
ActivityManager.getService().registerUserSwitchObserver(observer, TAG);
catch (RemoteException e)
// Shouldn't happen since in-process.
// Go.
readConfigurationLocked();
updateSettingsLocked();
mDirty |= DIRTY_BATTERY_STATE;
updatePowerStateLocked();
final ContentResolver resolver = mContext.getContentResolver();
mConstants.start(resolver);
mBatterySaverController.systemReady();
mBatterySaverPolicy.systemReady();
mFaceDownDetector.systemReady(mContext);
// Register for settings changes.
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.SCREENSAVER_ENABLED),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.SCREENSAVER_ACTIVATE_ON_SLEEP),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.SCREENSAVER_ACTIVATE_ON_DOCK),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.System.getUriFor(
Settings.System.SCREEN_OFF_TIMEOUT),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.SLEEP_TIMEOUT),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.ATTENTIVE_TIMEOUT),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Global.getUriFor(
Settings.Global.STAY_ON_WHILE_PLUGGED_IN),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.System.getUriFor(
Settings.System.SCREEN_BRIGHTNESS_MODE),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.System.getUriFor(
Settings.System.SCREEN_AUTO_BRIGHTNESS_ADJ),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Global.getUriFor(
Settings.Global.THEATER_MODE_ON),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.DOZE_ALWAYS_ON),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Secure.getUriFor(
Settings.Secure.DOUBLE_TAP_TO_WAKE),
false, mSettingsObserver, UserHandle.USER_ALL);
resolver.registerContentObserver(Settings.Global.getUriFor(
Settings.Global.DEVICE_DEMO_MODE),
false, mSettingsObserver, UserHandle.USER_SYSTEM);
IVrManager vrManager = IVrManager.Stub.asInterface(getBinderService(Context.VR_SERVICE));
if (vrManager != nullPowerManagerService的启动流程
Android7.0 PowerManagerService WakeLock的使用及流程