[PATCH] drm/probe-helper: Fix modes reporting for writeback connector

[Alexandru Gheorghe]

Writeback connector is reported as disconnected, currently this causes
the setting of the edid property to null and then exit.
In order to properly get the modes for writeback we need to add an
exception when connector type is DRM_MODE_CONNECTOR_WRITEBACK.

Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe at arm.com>
---
 drivers/gpu/drm/drm_probe_helper.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 52774339..c7bdbe2 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -472,7 +472,8 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
 
 	dev->mode_config.poll_running = drm_kms_helper_poll;
 
-	if (connector->status == connector_status_disconnected) {
+	if (connector->status == connector_status_disconnected &&
+	    connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) {
 		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
 			connector->base.id, connector->name);
 		drm_mode_connector_update_edid_property(connector, NULL);
-- 
2.7.4