diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 5831088e2cdd..586ce30943c2 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -303,9 +303,17 @@ static int analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp)
 
 	if (!data) {
 		/*
+		 * As the Table 3-4 in eDP v1.2 spec:
+		 * DPCD 0000Dh:
+		 * Bit 1 = FRAMING_CHANGE_CAPABLE
 		 * A setting of 1 indicates that this is an eDP device that
 		 * uses only Enhanced Framing, independently of the setting by
 		 * the source of ENHANCED_FRAME_EN
+		 *
+		 * And as the Table 3-3 in eDP v1.4 spec:
+		 * DPCD 0000Dh:
+		 * Bit 1 = RESERVED for eDP
+		 * New to eDP v1.4.(Read all 0s)
 		 */
 		ret = drm_dp_dpcd_readb(&dp->aux, DP_EDP_CONFIGURATION_CAP,
 					&data);