linux-kernel - Re: [PATCH 14/16] drm/msm/dpu: do not allow YUV formats if no CDM block is present

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Message-ID: <CAA8EJprZma-e=zbtDuGKfcHK7zTaSykACt+=rh7W92iEpif=Ug@mail.gmail.com>
Date:   Thu, 31 Aug 2023 03:24:44 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc:     freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, quic_jesszhan@...cinc.com,
        quic_parellan@...cinc.com, quic_khsieh@...cinc.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/16] drm/msm/dpu: do not allow YUV formats if no CDM
 block is present

On Thu, 31 Aug 2023 at 01:50, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>
> On chipsets where CDM block is not available OR where support has
> not been added yet do not allow YUV formats for writeback block.
>
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
> index 7fc174b33ae2..d8edca9bc964 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
> @@ -406,6 +406,12 @@ static int dpu_encoder_phys_wb_atomic_check(
>                 return ret;
>         }
>
> +       if (DPU_FORMAT_IS_YUV(to_dpu_format(msm_framebuffer_format(fb))) &&
> +           !phys_enc->dpu_kms->catalog->cdm) {
> +               DPU_ERROR("cannot support YUV formats without CDM block\n");
> +               return -EINVAL;
> +       }

Can we have YUV formats in wb_formats if we do not support CDM? That
would be an error.

> +
>         return 0;
>  }
>
> --
> 2.40.1
>


-- 
With best wishes
Dmitry