6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxxxxx>
Reviewed-by: Robert Foss <rfoss@xxxxxxxxxx>
Signed-off-by: Robert Foss <rfoss@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804-lt8912b-v1-4-c542692c6a2f@xxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/bridge/lontium-lt8912b.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 1977d3c0a81d1..ac76c23635892 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -558,6 +558,13 @@ 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) {
--
2.42.0
