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

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Message-ID: <20230602105350.GB26944@pendragon.ideasonboard.com>
Date:   Fri, 2 Jun 2023 13:53:50 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
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>,
        Biju Das <biju.das.jz@...renesas.com>,
        dri-devel@...ts.freedesktop.org, linux-doc@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] drm/todo: Add atomic modesetting references

Hi Geert,

Thank you for the patch.

On Fri, Jun 02, 2023 at 11:11:34AM +0200, Geert Uytterhoeven wrote:
> 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.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
>  Documentation/gpu/todo.rst | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> index 68bdafa0284f55f6..51eb67f5268c5ec1 100644
> --- 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).
> +suitable).  The "Atomic mode setting design overview" series [2][3] at

s/  / /

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>

> +LWN.net can also be helpful.
>  
>  As part of this drivers also need to convert to universal plane (which means
>  exposing primary & cursor as proper plane objects). But that's much easier to
>  do by directly using the new atomic helper driver callbacks.
>  
> +  - [1] https://blog.ffwll.ch/2014/11/atomic-modeset-support-for-kms-drivers.html
> +  - [2] https://lwn.net/Articles/653071/
> +  - [3] https://lwn.net/Articles/653466/
> +
>  Contact: Daniel Vetter, respective driver maintainers
>  
>  Level: Advanced

-- 
Regards,

Laurent Pinchart