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

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Date:   Fri, 13 Sep 2019 18:21:44 -0400
From:   Lyude Paul <lyude@...hat.com>
To:     Ilia Mirkin <imirkin@...m.mit.edu>
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, 2019-09-13 at 18:20 -0400, Ilia Mirkin wrote:
> 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)

good catch, will fix and respin in a moment
> 
> > 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
> > 
-- 
Cheers,
	Lyude Paul