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Date: Mon, 15 Aug 2022 20:06:51 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Marek Vasut <marex@...x.de>, Jonas Karlman <jonas@...boo.se>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Lucas Stach <l.stach@...gutronix.de>, Maxime Ripard <maxime@...no.tech>, Neil Armstrong <narmstrong@...libre.com>, Robert Foss <robert.foss@...aro.org>, Sam Ravnborg <sam@...nborg.org> Subject: [PATCH 5.15 767/779] drm/bridge: tc358767: Fix (e)DP bridge endpoint parsing in dedicated function From: Marek Vasut <marex@...x.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@...x.de> Cc: Jonas Karlman <jonas@...boo.se> Cc: Laurent Pinchart <Laurent.pinchart@...asonboard.com> Cc: Lucas Stach <l.stach@...gutronix.de> Cc: Marek Vasut <marex@...x.de> Cc: Maxime Ripard <maxime@...no.tech> Cc: Neil Armstrong <narmstrong@...libre.com> Cc: Robert Foss <robert.foss@...aro.org> Cc: Sam Ravnborg <sam@...nborg.org> Reviewed-by: Lucas Stach <l.stach@...gutronix.de> Link: https://patchwork.freedesktop.org/patch/msgid/20220428213132.447890-1-marex@denx.de Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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 @@ -1573,7 +1573,7 @@ static int tc_probe_edp_bridge_endpoint( tc->bridge.type = DRM_MODE_CONNECTOR_DisplayPort; } - return ret; + return 0; } static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
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