drm/radeon/kms: fix DP detect and EDID fetch for DP bridges

[pandora-kernel.git] / drivers / gpu / drm / radeon / radeon_display.c

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 28f4655..6cc17fb 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -707,16 +707,21 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
                radeon_router_select_ddc_port(radeon_connector);
 
        if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
-           (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)) {
+           (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) ||
+           radeon_connector_encoder_is_dp_bridge(&radeon_connector->base)) {
                struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
+
                if ((dig->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT ||
                     dig->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) && 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;
-       if (!radeon_connector->edid) {
-               radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
+                       radeon_connector->edid = drm_get_edid(&radeon_connector->base,
+                                                             &dig->dp_i2c_bus->adapter);
+               else if (radeon_connector->ddc_bus && !radeon_connector->edid)
+                       radeon_connector->edid = drm_get_edid(&radeon_connector->base,
+                                                             &radeon_connector->ddc_bus->adapter);
+       } else {
+               if (radeon_connector->ddc_bus && !radeon_connector->edid)
+                       radeon_connector->edid = drm_get_edid(&radeon_connector->base,
+                                                             &radeon_connector->ddc_bus->adapter);
        }
 
        if (!radeon_connector->edid) {
@@ -751,8 +756,17 @@ static int radeon_ddc_dump(struct drm_connector *connector)
        if (!radeon_connector->ddc_bus)
                return -1;
        edid = drm_get_edid(connector, &radeon_connector->ddc_bus->adapter);
+       /* Log EDID retrieval status here. In particular with regard to
+        * connectors with requires_extended_probe flag set, that will prevent
+        * function radeon_dvi_detect() to fetch EDID on this connector,
+        * as long as there is no valid EDID header found */
        if (edid) {
+               DRM_INFO("Radeon display connector %s: Found valid EDID",
+                               drm_get_connector_name(connector));
                kfree(edid);
+       } else {
+               DRM_INFO("Radeon display connector %s: No monitor connected or invalid EDID",
+                               drm_get_connector_name(connector));
        }
        return ret;
 }