diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index ed173d3..6f3af55 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -494,6 +494,10 @@ void radeon_dp_set_link_config(struct drm_connector *connector,
 
 	if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
 	    (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP)) {
+		if (dig_connector->dpcd[0] == 0) {
+			DRM_ERROR("corrupt dpcd, updating\n");
+			radeon_dp_getdpcd(radeon_connector);
+		}
 		dig_connector->dp_clock =
 			radeon_dp_get_dp_link_clock(connector, dig_connector->dpcd, mode->clock);
 		dig_connector->dp_lane_count =
@@ -550,6 +554,11 @@ void radeon_dp_set_rx_power_state(struct drm_connector *connector,
 
 	dig_connector = radeon_connector->con_priv;
 
+	if (dig_connector->dpcd[0] == 0) {
+		DRM_ERROR("corrupt dpcd, updating\n");
+		radeon_dp_getdpcd(radeon_connector);
+	}
+
 	/* power up/down the sink */
 	if (dig_connector->dpcd[0] >= 0x11) {
 		drm_dp_dpcd_writeb(&radeon_connector->ddc_bus->aux,
@@ -832,6 +841,11 @@ void radeon_dp_link_train(struct drm_encoder *encoder,
 	    (dig_connector->dp_sink_type != CONNECTOR_OBJECT_ID_eDP))
 		return;
 
+	if (dig_connector->dpcd[0] == 0) {
+		DRM_ERROR("corrupt dpcd, updating\n");
+		radeon_dp_getdpcd(radeon_connector);
+	}
+
 	/* DPEncoderService newer than 1.1 can't program properly the
 	 * training pattern. When facing such version use the
 	 * DIGXEncoderControl (X== 1 | 2)