tree 2c9a8c0c102dfbf951cae80b59c33c5168603918
parent 95081df451a0b3d1a67e9d956c4c062d47e339f7
author Andy McFadden <fadden@android.com> 1400789323 -0700
committer Andy McFadden <fadden@android.com> 1402431139 -0700

Disable DispSync resync when not needed

If app and SF events aren't using phase offsets, we don't need
to maintain the DispSync model.  We just turn hardware VSYNC on
whenever something wants to draw.  This avoids some edge cases
where we were doing too much resync work.

Also, updated the systrace output.  The "VsyncOn" line was a
combination of SF and app event threads, and would occasionally
be very weird.  Removed VsyncOn, renamed VSYNC to VSYNC-app,
and added VSYNC-sf.

Also, added more details to the --dispsync dumpsys output.

Also, renamed global constants to not look like local variables.

Bug 15516453

Change-Id: I0da10b72f0d9a7b7eb5202d87cc18967f698adbd