| Message ID | 20221026182824.876933-4-marijn.suijten@somainline.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/msm: Fix math issues in MSM DSC implementation | expand |
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 80dd9370a258..d9b3e336896f 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -1829,9 +1829,7 @@ static int dsi_populate_dsc_params(struct drm_dsc_config *dsc) * params are calculated */ groups_per_line = DIV_ROUND_UP(dsc->slice_width, 3); - dsc->slice_chunk_size = dsc->slice_width * dsc->bits_per_pixel / 8; - if ((dsc->slice_width * dsc->bits_per_pixel) % 8) - dsc->slice_chunk_size++; + dsc->slice_chunk_size = DIV_ROUND_UP(dsc->slice_width * dsc->bits_per_pixel, 8); /* rbs-min */ min_rate_buffer_size = dsc->rc_model_size - dsc->initial_offset +
This exact same math is used to compute bytes_in_slice above in dsi_update_dsc_timing(), also used to fill slice_chunk_size. Fixes: b9080324d6ca ("drm/msm/dsi: add support for dsc data") Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> --- drivers/gpu/drm/msm/dsi/dsi_host.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)