[RK3399][Android7.1] Input Subsystem Notes (1)-Introduction and Analysis of Linux Input Subsystem

platform	Kernel version	Android version
RK3399	Linux4.4	Android7.1

The input subsystem consists of three parts

• Input subsystem core layer ( Input Core)
• Drive layer
• Event processing layer ( Event Handler)

An input event, such as mouse movement, keyboard key press, etc. , arrives in the user space and is passed to the application in the order of Driver-> InputCore-> Eventhandler-> userspace.