[PATCH v1 6/9] drm/bridge: ti-sn65dsi86: Add NO_CONNECTOR support

[Sam Ravnborg <sam@xxxxxxxxxxxx>]

From: Rob Clark <robdclark@xxxxxxxxxxxx>

Slightly awkward to fish out the display_info when we aren't creating
own connector.  But I don't see an obvious better way.

v3:
 - Rebased and dropped the ti_sn_bridge_get_bpp() patch
   as this was solved in a different way (Sam)

v2:
 - Remove error return with NO_CONNECTOR flag (Rob)

Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Rob Clark <robdclark@xxxxxxxxxxxx>
Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
Cc: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Cc: Robert Foss <robert.foss@xxxxxxxxxx>
Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Jonas Karlman <jonas@xxxxxxxxx>
Cc: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
---
 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index dc6ec40bc1ef..a9041dfd2ae5 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -746,11 +746,6 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
 	int ret;
 
-	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
-		DRM_ERROR("Fix bridge driver to make connector optional!");
-		return -EINVAL;
-	}
-
 	pdata->aux.drm_dev = bridge->dev;
 	ret = drm_dp_aux_register(&pdata->aux);
 	if (ret < 0) {
@@ -758,12 +753,14 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 		return ret;
 	}
 
-	ret = ti_sn_bridge_connector_init(pdata);
-	if (ret < 0)
-		goto err_conn_init;
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+		ret = ti_sn_bridge_connector_init(pdata);
+		if (ret < 0)
+			goto err_conn_init;
 
-	/* We never want the next bridge to *also* create a connector: */
-	flags |= DRM_BRIDGE_ATTACH_NO_CONNECTOR;
+		/* We never want the next bridge to *also* create a connector: */
+		flags |= DRM_BRIDGE_ATTACH_NO_CONNECTOR;
+	}
 
 	/* Attach the next bridge */
 	ret = drm_bridge_attach(bridge->encoder, pdata->next_bridge,
@@ -774,7 +771,8 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 	return 0;
 
 err_dsi_host:
-	drm_connector_cleanup(&pdata->connector);
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+		drm_connector_cleanup(&pdata->connector);
 err_conn_init:
 	drm_dp_aux_unregister(&pdata->aux);
 	return ret;
-- 
2.32.0