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Commit e875af1a authored by Raj Kamal's avatar Raj Kamal Committed by Linux Build Service Account
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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
parent f674fa1c

services/surfaceflinger/DispSync.h

+2 −5
Original line number Diff line number Diff line
@@ -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;