This is a note to let you know that I've just added the patch titled
drm/bridge: lt8912b: set hdmi or dvi mode
to the 5.15-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-lt8912b-set-hdmi-or-dvi-mode.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit daef5ce9c86c9b15a87d2d105201c4bf25453e72
Author: Philippe Schenker <philippe.schenker@xxxxxxxxxxx>
Date: Thu Sep 22 14:43:04 2022 +0200
drm/bridge: lt8912b: set hdmi or dvi mode
[ Upstream commit 6dd1de12e1243f2013e4fabf31e99e63b1a860d0 ]
The Lontium LT8912 does have a setting for DVI or HDMI. This patch reads
from EDID what the display needs and sets it accordingly.
Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Signed-off-by: Philippe Schenker <philippe.schenker@xxxxxxxxxxx>
Acked-by: Adrien Grassein <adrien.grassein@xxxxxxxxx>
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220922124306.34729-3-dev@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 0fae72d45040..6e04d51b4636 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -321,6 +321,8 @@ static int lt8912_video_setup(struct lt8912 *lt)
vsync_activehigh ? BIT(0) : 0);
ret |= regmap_update_bits(lt->regmap[I2C_MAIN], 0xab, BIT(1),
hsync_activehigh ? BIT(1) : 0);
+ ret |= regmap_update_bits(lt->regmap[I2C_MAIN], 0xb2, BIT(0),
+ lt->connector.display_info.is_hdmi ? BIT(0) : 0);
return ret;
}
