Merge "DispSync: remove delay when enabling vsync events" into klp-dev
diff --git a/services/surfaceflinger/DispSync.cpp b/services/surfaceflinger/DispSync.cpp
index 167c6f0..ce07ab5 100644
--- a/services/surfaceflinger/DispSync.cpp
+++ b/services/surfaceflinger/DispSync.cpp
@@ -164,7 +164,14 @@
EventListener listener;
listener.mPhase = phase;
listener.mCallback = callback;
- listener.mLastEventTime = systemTime(SYSTEM_TIME_MONOTONIC);
+
+ // We want to allow the firstmost future event to fire without
+ // allowing any past events to fire. Because
+ // computeListenerNextEventTimeLocked filters out events within a half
+ // a period of the last event time, we need to initialize the last
+ // event time to a half a period in the past.
+ listener.mLastEventTime = systemTime(SYSTEM_TIME_MONOTONIC) - mPeriod / 2;
+
mEventListeners.push(listener);
mCond.signal();
