linux-kernel - Re: [PATCH 1/3] drm/todo: Add atomic modesetting references

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Date:   Fri, 2 Jun 2023 13:23:25 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Jonathan Corbet <corbet@....net>,
        Jyri Sarha <jyri.sarha@....fi>,
        Tomi Valkeinen <tomba@...nel.org>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH 1/3] drm/todo: Add atomic modesetting references

Hi Javier,

On Fri, Jun 2, 2023 at 12:39 PM Javier Martinez Canillas
<javierm@...hat.com> wrote:
> Geert Uytterhoeven <geert+renesas@...der.be> writes:
> > The section about converting existing KMS drivers to atomic modesetting
> > mentions the existence of a conversion guide, but does not reference it.
> > While the guide is old and rusty, it still contains useful information,
> > so add a link to it.  Also link to the LWN.net articles that give an
> > overview about the atomic mode setting design.

> > --- a/Documentation/gpu/todo.rst
> > +++ b/Documentation/gpu/todo.rst
> > @@ -49,14 +49,19 @@ converted over. Modern compositors like Wayland or Surfaceflinger on Android
> >  really want an atomic modeset interface, so this is all about the bright
> >  future.
> >
> > -There is a conversion guide for atomic and all you need is a GPU for a
> > +There is a conversion guide for atomic[1] and all you need is a GPU for a
> >  non-converted driver (again virtual HW drivers for KVM are still all
> > -suitable).
>
> Are any of the virtual drivers not yet ported to atomic? This sentence
> seems to be outdated and maybe you could remove it on a following patch?

Good question.  I'm not sure which driver(s) this refers to.
drivers/gpu/drm/vkms/ was introduced much later, and always had
DRIVER_ATOMIC. Perhaps just the boochs driver, which was converted?

> Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

Thanks!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds