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sf: Avoid disabling DispSync resync 

Avoid disabling DispSync resync if app and SF events aren't
using phase offsets. This prevents hardware VSYNC from turning
on always whenever something needs to be drawn, thereby
bringing down the power numbers.

Change-Id: I83c8f79eb46b9fdaa730ec32767ebed3286347b8
This commit is contained in:
Raj Kamal 2014-09-25 14:10:54 +05:30 committed by Linux Build Service Account
parent 24e0fdd93b
commit 67ec1ad104
1 changed files with 2 additions and 5 deletions
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7
services/surfaceflinger/DispSync.h
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@ -26,11 +26,8 @@
namespace android {
// Ignore present (retire) fences if the device doesn't have support for the
// sync framework, or if all phase offsets are zero. The latter is useful
// because it allows us to avoid resync bursts on devices that don't need
// phase-offset VSYNC events.
#if defined(RUNNING_WITHOUT_SYNC_FRAMEWORK) || \
(VSYNC_EVENT_PHASE_OFFSET_NS == 0 && SF_VSYNC_EVENT_PHASE_OFFSET_NS == 0)
// sync framework.
#if defined(RUNNING_WITHOUT_SYNC_FRAMEWORK)
static const bool kIgnorePresentFences = true;
#else
static const bool kIgnorePresentFences = false;