drm/bridge: lt8912b: Add missing drm_bridge_attach call

[ Upstream commit f45acf7acf75921c0409d452f0165f51a19a74fd ]

The driver does not call drm_bridge_attach(), which causes the next
bridge to not be added to the bridge chain. This causes the pipeline
init to fail when DRM_BRIDGE_ATTACH_NO_CONNECTOR is used.

Add the call to drm_bridge_attach().

Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804-lt8912b-v1-4-c542692c6a2f@ideasonboard.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 73b6fcae6dca86ee6f6dcda9cf2af58323165bf3..6891863ed5104aac3b60ca78a96364a5c13cd5bf 100644 (file)
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -548,6 +548,13 @@ static int lt8912_bridge_attach(struct drm_bridge *bridge,
        struct lt8912 *lt = bridge_to_lt8912(bridge);
        int ret;
 
+       ret = drm_bridge_attach(bridge->encoder, lt->hdmi_port, bridge,
+                               DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+       if (ret < 0) {
+               dev_err(lt->dev, "Failed to attach next bridge (%d)\n", ret);
+               return ret;
+       }
+
        if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
                ret = lt8912_bridge_connector_init(bridge);
                if (ret) {