On Fri, Apr 08, 2022 at 09:36:17AM +0800, CK Hu wrote:

Hi, Jitao & Rex:

Please help to comment on this patch.

Hi Chuang,

I already sent a v2 of this patch [1] because I forgot to add the Fixes tag. Sorry for the noise.

Thanks, Nícolas

[1] https://lore.kernel.org/all/20220408013950.674477-1-nfraprado@collabora.com/

On Thu, 2022-04-07 at 21:19 -0400, Nícolas F. R. A. Prado wrote:

...

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.

Signed-off-by: Nícolas F. R. A. Prado nfraprado@collabora.com

---

drivers/gpu/drm/mediatek/mtk_dpi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

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)