From: Marek Vasut marex@denx.de
commit 9030a9e571b3ba250d3d450a98310e3c74ecaff4 upstream.
Per toshiba,tc358767.yaml DT binding document, port@2 the output (e)DP port is optional. In case this port is not described in DT, the bridge driver operates in DPI-to-DP mode. The drm_of_find_panel_or_bridge() call in tc_probe_edp_bridge_endpoint() returns -ENODEV in case port@2 is not present in DT and this specific return value is incorrectly propagated outside of tc_probe_edp_bridge_endpoint() function. All other error values must be propagated and are propagated correctly.
Return 0 in case the port@2 is missing instead, that reinstates the original behavior before the commit this patch fixes.
Fixes: 8478095a8c4b ("drm/bridge: tc358767: Move (e)DP bridge endpoint parsing into dedicated function") Signed-off-by: Marek Vasut marex@denx.de Cc: Jonas Karlman jonas@kwiboo.se Cc: Laurent Pinchart Laurent.pinchart@ideasonboard.com Cc: Lucas Stach l.stach@pengutronix.de Cc: Marek Vasut marex@denx.de Cc: Maxime Ripard maxime@cerno.tech Cc: Neil Armstrong narmstrong@baylibre.com Cc: Robert Foss robert.foss@linaro.org Cc: Sam Ravnborg sam@ravnborg.org Reviewed-by: Lucas Stach l.stach@pengutronix.de Link: https://patchwork.freedesktop.org/patch/msgid/20220428213132.447890-1-marex@... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/bridge/tc358767.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -1559,7 +1559,7 @@ static int tc_probe_edp_bridge_endpoint( tc->bridge.type = DRM_MODE_CONNECTOR_DisplayPort; }
- return ret; + return 0; }
static void tc_clk_disable(void *data)