diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index a61ad72..3528b62 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -36,9 +36,10 @@
 namespace android {
 // ---------------------------------------------------------------------------
 
-EventThread::EventThread(const sp<SurfaceFlinger>& flinger)
-    : mFlinger(flinger),
+EventThread::EventThread(const sp<VSyncSource>& src)
+    : mVSyncSource(src),
       mUseSoftwareVSync(false),
+      mVsyncEnabled(false),
       mDebugVsyncEnabled(false) {
 
     for (int32_t i=0 ; i<DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES ; i++) {
@@ -110,19 +111,13 @@
     }
 }
 
-
-void EventThread::onVSyncReceived(int type, nsecs_t timestamp) {
-    ALOGE_IF(type >= DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES,
-            "received vsync event for an invalid display (id=%d)", type);
-
+void EventThread::onVSyncEvent(nsecs_t timestamp) {
     Mutex::Autolock _l(mLock);
-    if (type < DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES) {
-        mVSyncEvent[type].header.type = DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
-        mVSyncEvent[type].header.id = type;
-        mVSyncEvent[type].header.timestamp = timestamp;
-        mVSyncEvent[type].vsync.count++;
-        mCondition.broadcast();
-    }
+    mVSyncEvent[0].header.type = DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
+    mVSyncEvent[0].header.id = 0;
+    mVSyncEvent[0].header.timestamp = timestamp;
+    mVSyncEvent[0].vsync.count++;
+    mCondition.broadcast();
 }
 
 void EventThread::onHotplugReceived(int type, bool connected) {
@@ -308,18 +303,23 @@
 void EventThread::enableVSyncLocked() {
     if (!mUseSoftwareVSync) {
         // never enable h/w VSYNC when screen is off
-        mFlinger->eventControl(DisplayDevice::DISPLAY_PRIMARY,
-                SurfaceFlinger::EVENT_VSYNC, true);
-        mPowerHAL.vsyncHint(true);
+        if (!mVsyncEnabled) {
+            mVsyncEnabled = true;
+            mVSyncSource->setCallback(static_cast<VSyncSource::Callback*>(this));
+            mVSyncSource->setVSyncEnabled(true);
+            mPowerHAL.vsyncHint(true);
+        }
     }
     mDebugVsyncEnabled = true;
 }
 
 void EventThread::disableVSyncLocked() {
-    mFlinger->eventControl(DisplayDevice::DISPLAY_PRIMARY,
-            SurfaceFlinger::EVENT_VSYNC, false);
-    mPowerHAL.vsyncHint(false);
-    mDebugVsyncEnabled = false;
+    if (mVsyncEnabled) {
+        mVsyncEnabled = false;
+        mVSyncSource->setVSyncEnabled(false);
+        mPowerHAL.vsyncHint(false);
+        mDebugVsyncEnabled = false;
+    }
 }
 
 void EventThread::dump(String8& result) const {