Initial android 12.1 release. Linux 4.9.309, compiler optimization flag fixes, March security patch, face unlock fixes, and many other improvements.
Linux 4.9.303, refcount optimizations, qcom wfd, disabled backpressure propagation, parts update, February security patch, and Face Unlock!
Linux 4.9.301, refcount optimizations, disabled backpressure propagation, parts update, February security patch, and some new features.
Linux 4.9.297, Clang 14 and ThinLTO, fingerprint authentication boost, QTI BT stack, Quick Tap, Skia Vulkan, January security patch, and many more fixes
Built-in system updater installation fix.