Hi All:

At android power manage service, it have early suspend and late resume
mechanism to control devices such as LCD backlight, touchscreen, when wake
lock free/expired or user request suspend, the kernel will call early
suspend workqueue, and execute the registered early suspend handler. when
the user(PowerManageService) request "on" (echo "on" > /sys/power/state) ,
the late resume handlers will be called.

My question is,
1, when the PowerManagerService(PowerManagerSerivce.java) write "on" to
/sys/power/state (using SetScreenState(true) ),
2, and how the services know the resume of system to write /sys/power/state
?

Thanks in advance,

---
Best regards,
Zhang Jiejing

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