Commit 21bf6171 authored by Jessica Zhang's avatar Jessica Zhang Committed by Dmitry Baryshkov
Browse files

msm/drm/dsi: Round up DSC hdisplay calculation 



Currently, when compression is enabled, hdisplay is reduced via integer
division. This causes issues for modes where the original hdisplay is
not a multiple of 3.

To fix this, use DIV_ROUND_UP to divide hdisplay.

Suggested-by: default avatarMarijn Suijten <marijn.suijten@somainline.org>
Fixes: 08802f51 ("drm/msm/dsi: Add support for DSC configuration")
Reviewed-by: default avatarMarijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: default avatarJessica Zhang <quic_jesszhan@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/541970/
Link: https://lore.kernel.org/r/20230405-add-dsc-support-v6-1-95eab864d1b6@quicinc.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent 0d1b10c6

drivers/gpu/drm/msm/dsi/dsi_host.c

+1 −1
Original line number Diff line number Diff line
@@ -949,7 +949,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) 
		 * pulse width same

		 */

		h_total -= hdisplay;

		hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3;

		hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3);

		h_total += hdisplay;

		ha_end = ha_start + hdisplay;

	}