This is a note to let you know that I've just added the patch titled
drm/bridge: tc358767: Fix (e)DP bridge endpoint parsing in dedicated function
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-bridge-tc358767-fix-e-dp-bridge-endpoint-parsing-in-dedicated-function.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9030a9e571b3ba250d3d450a98310e3c74ecaff4 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@xxxxxxx>
Date: Thu, 28 Apr 2022 23:31:32 +0200
Subject: drm/bridge: tc358767: Fix (e)DP bridge endpoint parsing in dedicated function
From: Marek Vasut <marex@xxxxxxx>
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@xxxxxxx>
Cc: Jonas Karlman <jonas@xxxxxxxxx>
Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: Marek Vasut <marex@xxxxxxx>
Cc: Maxime Ripard <maxime@xxxxxxxxxx>
Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Cc: Robert Foss <robert.foss@xxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Reviewed-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220428213132.447890-1-marex@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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)
Patches currently in stable-queue which might be from marex@xxxxxxx are
queue-5.10/drm-bridge-tc358767-move-e-dp-bridge-endpoint-parsin.patch
queue-5.10/drm-bridge-tc358767-make-sure-refclk-clock-are-enabl.patch
queue-5.10/drm-bridge-tc358767-fix-e-dp-bridge-endpoint-parsing-in-dedicated-function.patch
