commit 81cd5d3b94d21253a0be925f4ae58cc7f4afeef7
author Mathias Agopian <mathias@google.com> Thu Oct 04 02:34:38 2012 -0700
committer Android (Google) Code Review <android-gerrit@google.com> Thu Oct 04 15:25:32 2012 -0700
tree decaf197dbbf88bf64a2547a241ec6df19a2bfe5
parent 27ec5739bc05330e08b02f25b62a8f597bad897a

make sure we don't call into the HWC HAL when not needed

when enabling/disabling vsync we now make sure to
not call into the HAL if the state wouldn't change.

Bug: 7274951

Change-Id: Ie24a6d68888a51b577acf9c2a973d85437cbacaf

services/surfaceflinger/EventThread.cpp

diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index 6b7c78b..edb9fa5 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -308,14 +308,14 @@
 void EventThread::enableVSyncLocked() {
     if (!mUseSoftwareVSync) {
         // never enable h/w VSYNC when screen is off
-        mFlinger->eventControl(SurfaceFlinger::EVENT_VSYNC, true);
+        mFlinger->eventControl(HWC_DISPLAY_PRIMARY, SurfaceFlinger::EVENT_VSYNC, true);
         mPowerHAL.vsyncHint(true);
     }
     mDebugVsyncEnabled = true;
 }
 
 void EventThread::disableVSyncLocked() {
-    mFlinger->eventControl(SurfaceFlinger::EVENT_VSYNC, false);
+    mFlinger->eventControl(HWC_DISPLAY_PRIMARY, SurfaceFlinger::EVENT_VSYNC, false);
     mPowerHAL.vsyncHint(false);
     mDebugVsyncEnabled = false;
 }