commit d7599d832c96cc3ba0c2ad19653f29bdfe084284
author Alec Mouri <alecmouri@google.com> Wed May 22 19:58:00 2019 -0700
committer Alec Mouri <alecmouri@google.com> Wed Jun 19 16:46:09 2019 -0700
tree f351ab88d336ec32ee65ede7e80a7f2dda4515ea
parent b488afaa2addf5b101ef24d0e8fc9812cb3c7f26

[SurfaceFlinger] Add vsync offset information to systrace.

* Trace offset values in DispSyncSource
* Trace offset type in VSyncModulator
* Refactor how offsets are stored so that refresh rate type can be
encoded in VSyncModulator
* Add locking to catch a potential race condition when updating offsets,
as phase offsets can be accessed or updated on multiple threads.

Bug: 133325345
Test: verified that correct offsets are reported in systrace
Change-Id: I38d43b722cd54728a2e4de3df7dd472aceb1de15