drm/radeon/kms: fix DP detect

only return connected if there is actually a
monitor connected.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/atombios_dp.c

@@ -440,7 +440,7 @@ u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector)
 					 dig_connector->dp_i2c_bus->rec.i2c_id, 0);
 }
 
-void radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
+bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
 {
 	struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
 	u8 msg[25];
@@ -456,10 +456,10 @@ void radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
 				printk("%02x ", msg[i]);
 			printk("\n");
 		}
-		return;
+		return true;
 	}
 	dig_connector->dpcd[0] = 0;
-	return;
+	return false;
 }
 
 void radeon_dp_set_link_config(struct drm_connector *connector,

drivers/gpu/drm/radeon/radeon_connectors.c

@@ -936,9 +936,10 @@ static enum drm_connector_status radeon_dp_detect(struct drm_connector *connecto
 
 	sink_type = radeon_dp_getsinktype(radeon_connector);
 	if (sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
-		radeon_dp_getdpcd(radeon_connector);
-		radeon_dig_connector->dp_sink_type = sink_type;
-		ret = connector_status_connected;
+		if (radeon_dp_getdpcd(radeon_connector)) {
+			radeon_dig_connector->dp_sink_type = sink_type;
+			ret = connector_status_connected;
+		}
 	} else {
 		radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
 		if (radeon_ddc_probe(radeon_connector)) {

drivers/gpu/drm/radeon/radeon_display.c

@@ -339,10 +339,8 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 
 	if (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
 		struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
-		if (dig->dp_i2c_bus) {
-			radeon_connector->edid = drm_get_edid(&radeon_connector->base, &dig->dp_i2c_bus->adapter);	
-			DRM_INFO("got edid %p from DP\n", radeon_connector->edid);
-		}
+		if (dig->dp_i2c_bus)
+			radeon_connector->edid = drm_get_edid(&radeon_connector->base, &dig->dp_i2c_bus->adapter);
 	}
 	if (!radeon_connector->ddc_bus)
 		return -1;

drivers/gpu/drm/radeon/radeon_mode.h

@@ -375,7 +375,7 @@ extern void radeon_dp_set_link_config(struct drm_connector *connector,
 extern void dp_link_train(struct drm_encoder *encoder,
 			  struct drm_connector *connector);
 extern u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector);
-extern void radeon_dp_getdpcd(struct radeon_connector *radeon_connector);
+extern bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector);
 extern void atombios_dig_transmitter_setup(struct drm_encoder *encoder,
 					   int action, uint8_t lane_num,
 					   uint8_t lane_set);