diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index c69ad13aab42e35198b282d1f3eb72e4543b5738..bb0417c521543ae2f9cbc80ba91667e315962034 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1419,6 +1419,25 @@ static void intel_dp_print_rates(struct intel_dp *intel_dp)
 	DRM_DEBUG_KMS("common rates: %s\n", str);
 }
 
+static void intel_dp_print_hw_revision(struct intel_dp *intel_dp)
+{
+	uint8_t rev;
+	int len;
+
+	if ((drm_debug & DRM_UT_KMS) == 0)
+		return;
+
+	if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
+	      DP_DWN_STRM_PORT_PRESENT))
+		return;
+
+	len = drm_dp_dpcd_read(&intel_dp->aux, DP_BRANCH_HW_REV, &rev, 1);
+	if (len < 0)
+		return;
+
+	DRM_DEBUG_KMS("sink hw revision: %d.%d\n", (rev & 0xf0) >> 4, rev & 0xf);
+}
+
 static int rate_to_index(int find, const int *rates)
 {
 	int i = 0;
@@ -4312,6 +4331,8 @@ intel_dp_long_pulse(struct intel_connector *intel_connector)
 
 	intel_dp_probe_oui(intel_dp);
 
+	intel_dp_print_hw_revision(intel_dp);
+
 	intel_dp_configure_mst(intel_dp);
 
 	if (intel_dp->is_mst) {
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index faea76bec514b9928cdda506c24307e3aaca6ad5..19ac59984df00d9ccd776a1c8a5156c8fc25048c 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -446,6 +446,7 @@
 #define DP_SINK_OUI			    0x400
 #define DP_BRANCH_OUI			    0x500
 #define DP_BRANCH_ID                        0x503
+#define DP_BRANCH_HW_REV                    0x509
 
 #define DP_SET_POWER                        0x600
 # define DP_SET_POWER_D0                    0x1