This is a note to let you know that I've just added the patch titled drm/bridge: lt9611: fix programming of video modes 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-lt9611-fix-programming-of-video-modes.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 ac5fa5d335aef36b943a278e9aa0e1f373cd692b Author: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Date: Wed Jan 18 10:16:49 2023 +0200 drm/bridge: lt9611: fix programming of video modes [ Upstream commit ad188aa47edaa033a270e1a3efae43836ff47569 ] Program the upper part of the hfront_porch into the proper register. Fixes: 23278bf54afe ("drm/bridge: Introduce LT9611 DSI to HDMI bridge") Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20230118081658.2198520-5-dmitry.baryshkov@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index 4c56407c4cf04..4925566dfc54f 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -185,7 +185,8 @@ static void lt9611_mipi_video_setup(struct lt9611 *lt9611, regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256)); - regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256)); + regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256) | + ((hfront_porch / 256) << 4)); regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256)); }