diff --git a/libs/gui/DisplayEventDispatcher.cpp b/libs/gui/DisplayEventDispatcher.cpp
index 54f383e..208d729 100644
--- a/libs/gui/DisplayEventDispatcher.cpp
+++ b/libs/gui/DisplayEventDispatcher.cpp
@@ -36,7 +36,10 @@
 DisplayEventDispatcher::DisplayEventDispatcher(const sp<Looper>& looper,
                                                ISurfaceComposer::VsyncSource vsyncSource,
                                                ISurfaceComposer::ConfigChanged configChanged)
-      : mLooper(looper), mReceiver(vsyncSource, configChanged), mWaitingForVsync(false) {
+      : mLooper(looper),
+        mReceiver(vsyncSource, configChanged),
+        mWaitingForVsync(false),
+        mConfigChangeFlag(configChanged) {
     ALOGV("dispatcher %p ~ Initializing display event dispatcher.", this);
 }
 
@@ -86,6 +89,18 @@
     return OK;
 }
 
+void DisplayEventDispatcher::toggleConfigEvents(ISurfaceComposer::ConfigChanged configChangeFlag) {
+    if (mConfigChangeFlag == configChangeFlag) {
+        return;
+    }
+    status_t status = mReceiver.toggleConfigEvents(configChangeFlag);
+    if (status) {
+        ALOGW("Failed enable config events, status=%d", status);
+        return;
+    }
+    mConfigChangeFlag = configChangeFlag;
+}
+
 int DisplayEventDispatcher::handleEvent(int, int events, void*) {
     if (events & (Looper::EVENT_ERROR | Looper::EVENT_HANGUP)) {
         ALOGE("Display event receiver pipe was closed or an error occurred.  "
@@ -140,7 +155,7 @@
                     break;
                 case DisplayEventReceiver::DISPLAY_EVENT_CONFIG_CHANGED:
                     dispatchConfigChanged(ev.header.timestamp, ev.header.displayId,
-                                          ev.config.configId);
+                                          ev.config.configId, ev.config.vsyncPeriod);
                     break;
                 default:
                     ALOGW("dispatcher %p ~ ignoring unknown event type %#x", this, ev.header.type);