[PATCH v7 8/8] drm/msm/dsi: update hdisplay calculation for dsi_timing_setup

[Marijn Suijten]

On 2023-05-09 15:06:54, Jessica Zhang wrote:
> hdisplay for compressed images should be calculated as bytes_per_slice *
> slice_count. Thus, use MSM DSC helper to calculate hdisplay for

For most intents and purposes, these values are the same when
bits_per_pixel=8.

We should find a place where we can assert that
slice_width*slice_count==hdisplay, though.

> dsi_timing_setup instead of directly using mode->hdisplay.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>

Reviewed-by: Marijn Suijten <marijn.suijten at somainline.org>

> ---
>  drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 508577c596ff..d60403372514 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -952,7 +952,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
>  		 * pulse width same
>  		 */
>  		h_total -= hdisplay;
> -		hdisplay /= 3;
> +		hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3;
>  		h_total += hdisplay;
>  		ha_end = ha_start + hdisplay;
>  	}
> 
> -- 
> 2.40.1
>