博客

电视遥控器，短端走待机(str待机)流程， 长按是关机，走关机流程，记录下待机流程。

参考博客

待机流程

Android P引入自动待机功能，只有存在WakeLock，wakeup_count就不会为0，每次acquire wake_lock会让wakeup_count加1，而release wake_lock会让wakeup_count减1，当wakeup_count为0则autosuspend会重新待机下去

相关代码

frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java

hardware/interfaces/power/1.0/default/Power.cpp

hardware/realtek/power/power.cpp

hardware/realtek/power/power.cpp

代码流程

goToSleepInternal()

–>goToSleepNoUpdateLocked()

–>setWakefulnessLocked(WAKEFULNESS_DOZING);

updatePowerStateLocked()

–> updateDisplayPowerStateLocked() //关闭屏幕

–> updateDreamLocked() //更新屏保状态

–> finishWakefulnessChangeIfNeededLocked()

–>mNotifier.onWakefulnessChangeFinished() //通知AMS, WMS系统状态改变。

–&