This is a note to let you know that I've just added the patch titled
drm/bridge: lt9611: Fix handling of 4k panels
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-lt9611-fix-handling-of-4k-panels.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 d1a97648ae028a44536927c87837c45ada7141c9 Mon Sep 17 00:00:00 2001
From: Robert Foss <robert.foss@xxxxxxxxxx>
Date: Thu, 17 Dec 2020 15:09:33 +0100
Subject: drm/bridge: lt9611: Fix handling of 4k panels
From: Robert Foss <robert.foss@xxxxxxxxxx>
commit d1a97648ae028a44536927c87837c45ada7141c9 upstream.
4k requires two dsi pipes, so don't report MODE_OK when only a
single pipe is configured. But rather report MODE_PANEL to
signal that requirements of the panel are not being met.
Reported-by: Peter Collingbourne <pcc@xxxxxxxxxx>
Suggested-by: Peter Collingbourne <pcc@xxxxxxxxxx>
Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxx>
Tested-by: John Stultz <john.stultz@xxxxxxxxxx>
Tested-by: Anibal Limon <anibal.limon@xxxxxxxxxx>
Tested-by: Peter Collingbourne <pcc@xxxxxxxxxx>
Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Acked-by: Vinod Koul <vkoul@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20201217140933.1133969-1-robert.foss@xxxxxxxxxx
Cc: Peter Collingbourne <pcc@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/lontium-lt9611.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -867,8 +867,14 @@ static enum drm_mode_status lt9611_bridg
const struct drm_display_mode *mode)
{
struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
- return lt9611_mode ? MODE_OK : MODE_BAD;
+ if (!lt9611_mode)
+ return MODE_BAD;
+ else if (lt9611_mode->intfs > 1 && !lt9611->dsi1)
+ return MODE_PANEL;
+ else
+ return MODE_OK;
}
static void lt9611_bridge_pre_enable(struct drm_bridge *bridge)
Patches currently in stable-queue which might be from robert.foss@xxxxxxxxxx are
queue-5.10/drm-bridge-lt9611-fix-handling-of-4k-panels.patch
