This is a note to let you know that I've just added the patch titled
drm/mediatek: dpi: Use mt8183 output formats for mt8192
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-mediatek-dpi-use-mt8183-output-formats-for-mt819.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 11f69e2e23d6e6dfb3bd6a6e4b34f8b81e9ca9dd
Author: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Date: Thu Apr 7 21:39:50 2022 -0400
drm/mediatek: dpi: Use mt8183 output formats for mt8192
[ Upstream commit 7112e0b0a58be8575547eba6596c42710922674f ]
The configuration for mt8192 was incorrectly using the output formats
from mt8173. Since the output formats for mt8192 are instead the same
ones as for mt8183, which require two bus samples per pixel, the
pixelclock and DDR edge setting were misconfigured. This made external
displays unable to show the image.
Fix the issue by correcting the output format for mt8192 to be the same
as for mt8183, fixing the usage of external displays for mt8192.
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20220408013950.674477-1-nfraprado@xxxxxxxxxxxxx/
Fixes: be63f6e8601f ("drm/mediatek: dpi: Add output bus formats to driver data")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Reviewed-by: Rex-BC Chen <rex-bc.chen@xxxxxxxxxxxx>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 4554e2de1430..e61cd67b978f 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -819,8 +819,8 @@ static const struct mtk_dpi_conf mt8192_conf = {
.cal_factor = mt8183_calculate_factor,
.reg_h_fre_con = 0xe0,
.max_clock_khz = 150000,
- .output_fmts = mt8173_output_fmts,
- .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
+ .output_fmts = mt8183_output_fmts,
+ .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
};
static int mtk_dpi_probe(struct platform_device *pdev)
