Here is a list of all related documentation pages:

SYN_DROPPED handling	This page describes how libevdev handles SYN_DROPPED events
Compatibility and Behavior across kernel versions	This page describes libevdev's behavior when the build-time kernel and the run-time kernel differ in their feature set
evdev ioctls	This page lists the status of the evdev-specific ioctls in libevdev
Kernel header	Libevdev provides its own copy of the Linux kernel header file and compiles against the definitions define here
libevdev-internal test suite	Libevdev's internal test suite uses the Check unit testing framework