linux-kernel - Re: [PATCH 01/16] drm/msm/dpu: fix writeback programming for YUV cases

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Message-ID: <CAA8EJpoc6ig=Vy7gFJ0nnsAP5HvFB+=ajk94x26Ah0D_g2yJug@mail.gmail.com>
Date:   Thu, 31 Aug 2023 02:38:08 +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 01/16] drm/msm/dpu: fix writeback programming for YUV cases

On Thu, 31 Aug 2023 at 01:49, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>
> For YUV cases, setting the required format bits was missed
> out in the register programming. Lets fix it now in preparation
> of adding YUV formats support for writeback.
>
> Fixes: 84a33d0fd921 ("drm/msm/dpu: add dpu_hw_wb abstraction for writeback blocks")

Since we were not exporting YUV formats, this tag is not correct. This
is a mere functional change, not a fix.

> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
> index ebc416400382..0aa598b355e9 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
> @@ -86,6 +86,9 @@ static void dpu_hw_wb_setup_format(struct dpu_hw_wb *ctx,
>                         dst_format |= BIT(14); /* DST_ALPHA_X */
>         }
>
> +       if (DPU_FORMAT_IS_YUV(fmt))
> +               dst_format |= BIT(15);
> +
>         pattern = (fmt->element[3] << 24) |
>                 (fmt->element[2] << 16) |
>                 (fmt->element[1] << 8)  |
> --
> 2.40.1
>


-- 
With best wishes
Dmitry