linux-kernel - Re: [v1] drm/msm/dpu: request for display color blocks based on hw catalog entry

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Date:   Thu, 11 Jun 2020 08:15:03 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Krishna Manikandan <mkrishn@...eaurora.org>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Kalyan Thota <kalyan_t@...eaurora.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sean Paul <seanpaul@...omium.org>,
        "Kristian H. Kristensen" <hoegsberg@...omium.org>,
        nganji@...eaurora.org, Matthias Kaehlcke <mka@...omium.org>,
        John Stultz <john.stultz@...aro.org>,
        Douglas Anderson <dianders@...omium.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        Jordan Crouse <jcrouse@...eaurora.org>
Subject: Re: [v1] drm/msm/dpu: request for display color blocks based on hw
 catalog entry

On Thu, Jun 11, 2020 at 5:55 AM Krishna Manikandan
<mkrishn@...eaurora.org> wrote:
>
> From: Kalyan Thota <kalyan_t@...eaurora.org>
>
> Request for color processing blocks only if they are
> available in the display hw catalog and they are
> sufficient in number for the selection.
>

I believe this should have:

Fixes: e47616df008b ("drm/msm/dpu: add support for color processing
blocks in dpu driver")

> Signed-off-by: Kalyan Thota <kalyan_t@...eaurora.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 63976dc..9f8de77 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -521,7 +521,7 @@ static struct msm_display_topology dpu_encoder_get_topology(
>                         struct dpu_kms *dpu_kms,
>                         struct drm_display_mode *mode)
>  {
> -       struct msm_display_topology topology;
> +       struct msm_display_topology topology = {0};
>         int i, intf_count = 0;
>
>         for (i = 0; i < MAX_PHYS_ENCODERS_PER_VIRTUAL; i++)
> @@ -537,7 +537,8 @@ static struct msm_display_topology dpu_encoder_get_topology(
>          * 1 LM, 1 INTF
>          * 2 LM, 1 INTF (stream merge to support high resolution interfaces)
>          *
> -        * Adding color blocks only to primary interface
> +        * Adding color blocks only to primary interface if available in
> +        * sufficient number
>          */
>         if (intf_count == 2)
>                 topology.num_lm = 2;
> @@ -546,8 +547,11 @@ static struct msm_display_topology dpu_encoder_get_topology(
>         else
>                 topology.num_lm = (mode->hdisplay > MAX_HDISPLAY_SPLIT) ? 2 : 1;
>
> -       if (dpu_enc->disp_info.intf_type == DRM_MODE_ENCODER_DSI)
> -               topology.num_dspp = topology.num_lm;
> +       if (dpu_enc->disp_info.intf_type == DRM_MODE_ENCODER_DSI) {
> +               if (dpu_kms->catalog->dspp &&
> +                       (dpu_kms->catalog->dspp_count >= topology.num_lm))
> +                       topology.num_dspp = topology.num_lm;
> +       }
>
>         topology.num_enc = 0;
>         topology.num_intf = intf_count;
> --
> 1.9.1
>