[PATCH v2 17/19] drm/msm/dpu: modify timing engine programming for YUV420 over DP

[Dmitry Baryshkov]

On Sat, 10 Feb 2024 at 03:52, Paloma Arellano <quic_parellan at quicinc.com> wrote:
>
> Adjust the encoder timing engine setup programming in the case of video
> mode for YUV420 over DP to accommodate CDM.
>
> Changes in v2:
>         - Move timing engine programming to this patch
>
> Signed-off-by: Paloma Arellano <quic_parellan at quicinc.com>
> ---
>  .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 16 ++++++++++++----
>  1 file changed, 12 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
> index 3f102b2813ca8..fb46d907312a7 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
> @@ -235,8 +235,9 @@ static void dpu_encoder_phys_vid_setup_timing_engine(
>  {
>         struct drm_display_mode mode;
>         struct dpu_hw_intf_timing_params timing_params = { 0 };
> +       struct dpu_hw_cdm *hw_cdm;
>         const struct dpu_format *fmt = NULL;
> -       u32 fmt_fourcc = DRM_FORMAT_RGB888;
> +       u32 fmt_fourcc;
>         unsigned long lock_flags;
>         struct dpu_hw_intf_cfg intf_cfg = { 0 };
>
> @@ -255,17 +256,21 @@ static void dpu_encoder_phys_vid_setup_timing_engine(
>         DPU_DEBUG_VIDENC(phys_enc, "enabling mode:\n");
>         drm_mode_debug_printmodeline(&mode);
>
> -       if (phys_enc->split_role != ENC_ROLE_SOLO) {
> +       fmt_fourcc = dpu_encoder_get_drm_fmt(phys_enc);
> +
> +       if (phys_enc->split_role != ENC_ROLE_SOLO || fmt_fourcc == DRM_FORMAT_YUV420) {
>                 mode.hdisplay >>= 1;
>                 mode.htotal >>= 1;
>                 mode.hsync_start >>= 1;
>                 mode.hsync_end >>= 1;
> +               mode.hskew >>= 1;

hskew change seems to warrant a separate patch with Fixes for
25fdd5933e4c ("drm/msm: Add SDM845 DPU support")

>
>                 DPU_DEBUG_VIDENC(phys_enc,
> -                       "split_role %d, halve horizontal %d %d %d %d\n",
> +                       "split_role %d, halve horizontal %d %d %d %d %d\n",
>                         phys_enc->split_role,
>                         mode.hdisplay, mode.htotal,
> -                       mode.hsync_start, mode.hsync_end);
> +                       mode.hsync_start, mode.hsync_end,
> +                       mode.hskew);
>         }
>
>         drm_mode_to_intf_timing_params(phys_enc, &mode, &timing_params);
> @@ -273,6 +278,9 @@ static void dpu_encoder_phys_vid_setup_timing_engine(
>         fmt = dpu_get_dpu_format(fmt_fourcc);
>         DPU_DEBUG_VIDENC(phys_enc, "fmt_fourcc 0x%X\n", fmt_fourcc);
>
> +       hw_cdm = phys_enc->hw_cdm;
> +       if (hw_cdm)
> +               intf_cfg.cdm = hw_cdm->idx;

No need for a separate local variable.

>         intf_cfg.intf = phys_enc->hw_intf->idx;
>         intf_cfg.intf_mode_sel = DPU_CTL_MODE_SEL_VID;
>         intf_cfg.stream_sel = 0; /* Don't care value for video mode */
> --
> 2.39.2
>


-- 
With best wishes
Dmitry