On Wed, 3 Apr 2024 at 12:11, Jun Nie <jun.nie@xxxxxxxxxx> wrote:
>
> From: Jonathan Marek <jonathan@xxxxxxxx>
>
> Video mode DSC won't work if this field is not set correctly. Set it to fix
> video mode DSC (for slice_per_pkt==1 cases at least).
>
> Fixes: 08802f515c3c ("drm/msm/dsi: Add support for DSC configuration")
> Signed-off-by: Jonathan Marek <jonathan@xxxxxxxx>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
You S-o-b is missing
> ---
> drivers/gpu/drm/msm/dsi/dsi_host.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 2a0422cad6de..80ea4f1d8274 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -858,6 +858,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
> u32 slice_per_intf, total_bytes_per_intf;
> u32 pkt_per_line;
> u32 eol_byte_num;
> + u32 bytes_per_pkt;
>
> /* first calculate dsc parameters and then program
> * compress mode registers
> @@ -865,6 +866,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
> slice_per_intf = msm_dsc_get_slices_per_intf(dsc, hdisplay);
>
> total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
> + bytes_per_pkt = dsc->slice_chunk_size; /* * slice_per_pkt; */
>
> eol_byte_num = total_bytes_per_intf % 3;
>
> @@ -902,6 +904,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
> dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
> dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
> } else {
> + reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_WC(bytes_per_pkt);
> dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
> }
> }
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
