This is a note to let you know that I've just added the patch titled
drm/bridge: tc358767: fix probe without attached output node
to the 4.12-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-probe-without-attached-output-node.patch
and it can be found in the queue-4.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d630213f2a47933e1037909273a20023ba3e598d Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Date: Mon, 10 Jul 2017 14:41:25 +0200
Subject: drm/bridge: tc358767: fix probe without attached output node
From: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
commit d630213f2a47933e1037909273a20023ba3e598d upstream.
The output node of the TC358767 is only used if another bridge is chained
behind it. Panels attached to the TC358767 can be detected using the usual
DP AUX probing. This restores the old behavior of ignoring the output if
no endpoint is found.
Fixes: ebc944613567 (drm: convert drivers to use drm_of_find_panel_or_bridge)
Acked-by: Andrey Gusakov <andrey.gusakov@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20170710124125.9019-1-l.stach@xxxxxxxxxxxxxx
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
@@ -1255,7 +1255,7 @@ static int tc_probe(struct i2c_client *c
/* port@2 is the output port */
ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &tc->panel, NULL);
- if (ret)
+ if (ret && ret != -ENODEV)
return ret;
/* Shut down GPIO is optional */
Patches currently in stable-queue which might be from l.stach@xxxxxxxxxxxxxx are
queue-4.12/drm-bridge-tc358767-fix-probe-without-attached-output-node.patch
queue-4.12/drm-etnaviv-fix-off-by-one-error-in-reloc-checking.patch