tree 1a9d80f7c70d0fc59257e04b9f0fb6a85ef632ba
parent dce956c3061a3d489cea8335a4ae49d182e0a061
author Ady Abraham <adyabr@google.com> 1595614195 -0700
committer Ady Abraham <adyabr@google.com> 1595968956 +0000

SF: use cached vsync period

Don't query the vsync period from hwc but instead use the cached
value in SF. The reason for this change is a race condition with AOD:
1. SF changes refresh rate to from X to Y
2. HWC is caching Y since the display is already in AOD and can't
   change refresh rate.
3. SF calls HWC to get the display out from AOD and query the refresh rate.
   At this point HWC returns X as the refresh rate didn't change yet.
4. HWC changes the refresh rate to Y.
5. SF thinks the refresh rate is X -- mismatch.

Test: enable / disable AOD in a loop
Bug: 160966959

Change-Id: I127c3a445416607dee9402031e07c8fece7d167b