linux-kernel - Re: [PATCH v6 8/8] drm/msm/dp: Handle eDP mode

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Message-ID: <CAA8EJprvE31ex3fCQHZ-=x+EWHK4UZ0qqHRh+rH4dk5TPhmVyw@mail.gmail.com>
Date:   Thu, 31 Mar 2022 01:08:02 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Sankeerth Billakanti <quic_sbillaka@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, robdclark@...il.com,
        seanpaul@...omium.org, swboyd@...omium.org,
        quic_kalyant@...cinc.com, quic_abhinavk@...cinc.com,
        dianders@...omium.org, quic_khsieh@...cinc.com,
        bjorn.andersson@...aro.org, sean@...rly.run, airlied@...ux.ie,
        daniel@...ll.ch, quic_vproddut@...cinc.com,
        quic_aravindh@...cinc.com
Subject: Re: [PATCH v6 8/8] drm/msm/dp: Handle eDP mode_valid differently from dp

On Wed, 30 Mar 2022 at 19:04, Sankeerth Billakanti
<quic_sbillaka@...cinc.com> wrote:
>
> The panel-edp driver modes needs to be validated differently from DP
> because the link capabilities are not available for EDP by that time.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@...cinc.com>

This should not be necessary after
https://patchwork.freedesktop.org/patch/479261/?series=101682&rev=1.
Could you please check?

> ---
>  drivers/gpu/drm/msm/dp/dp_display.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 8bafdd0..f9c7d9a 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1003,6 +1003,12 @@ enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
>                 return -EINVAL;
>         }
>
> +       if (dp->connector_type == DRM_MODE_CONNECTOR_eDP) {
> +               if (mode_pclk_khz > DP_MAX_PIXEL_CLK_KHZ)
> +                       return MODE_CLOCK_HIGH;
> +               return MODE_OK;
> +       }
> +
>         if ((dp->max_pclk_khz <= 0) ||
>                         (dp->max_pclk_khz > DP_MAX_PIXEL_CLK_KHZ) ||
>                         (mode->clock > dp->max_pclk_khz))
> --
> 2.7.4
>


-- 
With best wishes
Dmitry