5.15-stable review patch. If anyone has any objections, please let me know.
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From: Tomi Valkeinen tomi.valkeinen@ideasonboard.com
[ 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-c542692c... Signed-off-by: Sasha Levin sashal@kernel.org --- 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 73b6fcae6dca8..6891863ed5104 100644 --- 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) {