ADHOC/replicant-frameworks_native
3
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

am a04fd39c: am 8e26b28b: Filter out vsync events from HWC with duplicate timestamps

Browse Source 
* commit 'a04fd39cb88bb6df5f639464f70795f58cd0aefa':
  Filter out vsync events from HWC with duplicate timestamps
This commit is contained in:
Jesse Hall 2013-10-15 05:05:36 -07:00 committed by Android Git Automerger
commit adbb3062e1
1 changed files with 16 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
services/surfaceflinger/DisplayHardware/HWComposer.cpp
View File

@ -283,13 +283,27 @@ void HWComposer::invalidate() {
void HWComposer::vsync(int disp, int64_t timestamp) {
if (uint32_t(disp) < HWC_NUM_PHYSICAL_DISPLAY_TYPES) {
{
Mutex::Autolock _l(mLock);
// There have been reports of HWCs that signal several vsync events
// with the same timestamp when turning the display off and on. This
// is a bug in the HWC implementation, but filter the extra events
// out here so they don't cause havoc downstream.
if (timestamp == mLastHwVSync[disp]) {
ALOGW("Ignoring duplicate VSYNC event from HWC (t=%lld)",
timestamp);
return;
}
mLastHwVSync[disp] = timestamp;
}
char tag[16];
snprintf(tag, sizeof(tag), "HW_VSYNC_%1u", disp);
ATRACE_INT(tag, ++mVSyncCounts[disp] & 1);
mEventHandler.onVSyncReceived(disp, timestamp);
Mutex::Autolock _l(mLock);
mLastHwVSync[disp] = timestamp;
}
}