diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 2f665a4..c6943de 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -216,10 +216,12 @@
  * enum msm_event_wait - type of HW events to wait for
  * @MSM_ENC_COMMIT_DONE - wait for the driver to flush the registers to HW
  * @MSM_ENC_TX_COMPLETE - wait for the HW to transfer the frame to panel
+ * @MSM_ENC_VBLANK - wait for the HW VBLANK event (for driver-internal waiters)
  */
 enum msm_event_wait {
 	MSM_ENC_COMMIT_DONE = 0,
 	MSM_ENC_TX_COMPLETE,
+	MSM_ENC_VBLANK,
 };
 
 /**