On Sat, Mar 07, 2026 at 07:12:48PM +0800, Pengyu Luo wrote:
> mipi_dsi_pixel_format_to_bpp return dst bpp not src bpp, dst bpp may
> not be the uncompressed data size. use src bpc * 3 to get src bpp,
> this aligns with pclk rate calculation.
>
> Fixes: ac47870fd795 ("drm/msm/dsi: fix hdisplay calculation when programming
> dsi registers")
> Signed-off-by: Pengyu Luo <[email protected]>
> ---
> drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Pengyu, what is your target platform?
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c
> b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index e8e83ee61e..7c16216e8b 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -1030,7 +1030,7 @@ static void dsi_timing_setup(struct msm_dsi_host
> *msm_host, bool is_bonded_dsi)
> */
> h_total -= hdisplay;
> if (wide_bus_enabled)
> - bits_per_pclk =
> mipi_dsi_pixel_format_to_bpp(msm_host->format);
> + bits_per_pclk = dsc->bits_per_component * 3;
> else
> bits_per_pclk = 24;
>
> --
> 2.53.0
>
--
With best wishes
Dmitry
