diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 11c39f15f1b32b2eb61a21fda7573008d4d54d5a..8b9ac321c3bdb059954a30cd49a7d383a54293ee 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -735,6 +735,12 @@
 # define DP_PSR_SINK_INTERNAL_ERROR         7
 # define DP_PSR_SINK_STATE_MASK             0x07
 
+#define DP_SYNCHRONIZATION_LATENCY_IN_SINK		0x2009 /* edp 1.4 */
+# define DP_MAX_RESYNC_FRAME_COUNT_MASK			(0xf << 0)
+# define DP_MAX_RESYNC_FRAME_COUNT_SHIFT		0
+# define DP_LAST_ACTUAL_SYNCHRONIZATION_LATENCY_MASK	(0xf << 4)
+# define DP_LAST_ACTUAL_SYNCHRONIZATION_LATENCY_SHIFT	4
+
 #define DP_RECEIVER_ALPM_STATUS		    0x200b  /* eDP 1.4 */
 # define DP_ALPM_LOCK_TIMEOUT_ERROR	    (1 << 0)