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drm/bridge: cdns-dsi: Fix connecting to next bridge

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commit 688eb4d465484bc2a3471a6a6f06f833b58c7867 upstream.

Fix the OF node pointer passed to the of_drm_find_bridge() call to find
the next bridge in the display chain.

The code to find the next panel (and create its panel-bridge) works
fine, but to find the next (non-panel) bridge does not.

To find the next bridge in the pipeline, we need to pass "np" - the OF
node pointer of the next entity in the devicetree chain. Passing
"of_node" to of_drm_find_bridge (which is what the code does currently)
will fetch the bridge for the cdns-dsi which is not what's required.

Fix that.

Fixes: e19233955d ("drm/bridge: Add Cadence DSI driver")
Cc: stable@vger.kernel.org
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Signed-off-by: Aradhya Bhatia <aradhya.bhatia@linux.dev>
Link: https://lore.kernel.org/r/20250329113925.68204-2-aradhya.bhatia@linux.dev
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aradhya Bhatia
2025-03-29 17:09:12 +05:30
committed by Greg Kroah-Hartman
parent f9b819c39d
commit c4ee1b31a5
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
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@@ -958,7 +958,7 @@ static int cdns_dsi_attach(struct mipi_dsi_host *host,
bridge = drm_panel_bridge_add_typed(panel, bridge = drm_panel_bridge_add_typed(panel,
DRM_MODE_CONNECTOR_DSI); DRM_MODE_CONNECTOR_DSI);
} else { } else {
bridge = of_drm_find_bridge(dev->dev.of_node); bridge = of_drm_find_bridge(np);
if (!bridge) if (!bridge)
bridge = ERR_PTR(-EINVAL); bridge = ERR_PTR(-EINVAL);
} }