linux-kernel - Re: [PATCH 2/4] drm/nouveau: dispnv50: Remove nv50_mstc_best

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Message-ID: <CAKb7UvgQE0UDTvvhbq4FgtgOWjvXDDKSZs8RSLA-ECa2YZiFLA@mail.gmail.com>
Date:   Fri, 13 Sep 2019 18:20:24 -0400
From:   Ilia Mirkin <imirkin@...m.mit.edu>
To:     Lyude Paul <lyude@...hat.com>
Cc:     nouveau <nouveau@...ts.freedesktop.org>,
        Ben Skeggs <bskeggs@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] drm/nouveau: dispnv50: Remove nv50_mstc_best_encoder()

On Fri, Sep 13, 2019 at 6:05 PM Lyude Paul <lyude@...hat.com> wrote:
>
> When drm_connector_helper_funcs->atomic_best_encoder is defined,
> ->best_encoder is ignored both by the atomic modesetting helpers. That

By both the atomic modesetting helpers and ... (usually "both" implies 2 things)

> being said, this hook is completely broken anyway - it always returns
> the first msto for a given mstc, despite the fact it might already be in
> use.
>
> So, just get rid of it. We'll need this in a moment anyway, when we make
> mstos per-head as opposed to per-connector.
>
> Signed-off-by: Lyude Paul <lyude@...hat.com>
> ---
>  drivers/gpu/drm/nouveau/dispnv50/disp.c | 9 ---------
>  1 file changed, 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index b46be8a091e9..a3f350fdfa8c 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -920,14 +920,6 @@ nv50_mstc_atomic_best_encoder(struct drm_connector *connector,
>         return &mstc->mstm->msto[head->base.index]->encoder;
>  }
>
> -static struct drm_encoder *
> -nv50_mstc_best_encoder(struct drm_connector *connector)
> -{
> -       struct nv50_mstc *mstc = nv50_mstc(connector);
> -
> -       return &mstc->mstm->msto[0]->encoder;
> -}
> -
>  static enum drm_mode_status
>  nv50_mstc_mode_valid(struct drm_connector *connector,
>                      struct drm_display_mode *mode)
> @@ -990,7 +982,6 @@ static const struct drm_connector_helper_funcs
>  nv50_mstc_help = {
>         .get_modes = nv50_mstc_get_modes,
>         .mode_valid = nv50_mstc_mode_valid,
> -       .best_encoder = nv50_mstc_best_encoder,
>         .atomic_best_encoder = nv50_mstc_atomic_best_encoder,
>         .atomic_check = nv50_mstc_atomic_check,
>  };
> --
> 2.21.0
>