diff --git a/include/gui/ISurfaceComposer.h b/include/gui/ISurfaceComposer.h
index 74a4123..74ccf95 100644
--- a/include/gui/ISurfaceComposer.h
+++ b/include/gui/ISurfaceComposer.h
@@ -171,6 +171,10 @@
      */
     virtual status_t getHdrCapabilities(const sp<IBinder>& display,
             HdrCapabilities* outCapabilities) const = 0;
+
+    virtual status_t enableVSyncInjections(bool enable) = 0;
+
+    virtual status_t injectVSync(nsecs_t when) = 0;
 };
 
 // ----------------------------------------------------------------------------
@@ -202,6 +206,8 @@
         GET_DISPLAY_COLOR_MODES,
         GET_ACTIVE_COLOR_MODE,
         SET_ACTIVE_COLOR_MODE,
+        ENABLE_VSYNC_INJECTIONS,
+        INJECT_VSYNC
     };
 
     virtual status_t onTransact(uint32_t code, const Parcel& data,