diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index 438a6da..986aec5 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -350,15 +350,28 @@
 }
 
 // this needs to be thread safe
-nsecs_t DisplayHardware::waitForVSync() const {
+nsecs_t DisplayHardware::waitForRefresh() const {
     nsecs_t timestamp;
     if (mVSync.wait(&timestamp) < 0) {
         // vsync not supported!
         usleep( getDelayToNextVSyncUs(&timestamp) );
     }
+    mLastHwVSync = timestamp; // FIXME: Not thread safe
     return timestamp;
 }
 
+nsecs_t DisplayHardware::getRefreshTimestamp() const {
+    // this returns the last refresh timestamp.
+    // if the last one is not available, we estimate it based on
+    // the refresh period and whatever closest timestamp we have.
+    nsecs_t now = systemTime();
+    return now - ((now - mLastHwVSync) %  mRefreshPeriod);
+}
+
+nsecs_t DisplayHardware::getRefreshPeriod() const {
+    return mRefreshPeriod;
+}
+
 int32_t DisplayHardware::getDelayToNextVSyncUs(nsecs_t* timestamp) const {
     Mutex::Autolock _l(mFakeVSyncMutex);
     const nsecs_t period = mRefreshPeriod;
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardware.h b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
index 77da272..02be4dc 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardware.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
@@ -76,7 +76,9 @@
     uint32_t    getMaxViewportDims() const;
 
     // waits for the next vsync and returns the timestamp of when it happened
-    nsecs_t        waitForVSync() const;
+    nsecs_t     waitForRefresh() const;
+    nsecs_t     getRefreshPeriod() const;
+    nsecs_t     getRefreshTimestamp() const;
 
     uint32_t getPageFlipCount() const;
     EGLDisplay getEGLDisplay() const { return mDisplay; }
@@ -119,6 +121,7 @@
     mutable Mutex   mFakeVSyncMutex;
     mutable nsecs_t mNextFakeVSync;
     nsecs_t         mRefreshPeriod;
+    mutable nsecs_t mLastHwVSync;
 
     HWComposer*     mHwc;