linux-kernel - Re: [PATCH] drm/doc: Add section in the introduction page about learning material

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Date:   Thu, 27 Jan 2022 11:50:30 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>,
        linux-kernel@...r.kernel.org
Cc:     Jonathan Corbet <corbet@....net>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-doc@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Pekka Paalanen <pekka.paalanen@...labora.co.uk>
Subject: Re: [PATCH] drm/doc: Add section in the introduction page about
 learning material

Hello Thomas,

On 1/27/22 10:18, Thomas Zimmermann wrote:
> Hi Javier,
> 
> thanks for this patch.
> 
> Acked-by: Thomas Zimmermann <tzimmermann@...e.de>
>

Thanks!
 
> Find some ideas for consideration below.
> 

[snip]

>> +
>> +Learning material
>> +=================
> 
> Maybe 'External References'.
>

Agreed, I'll change it.

>> +
>> +Since the Linux DRM layer supports complex graphics devices, it can be quite
>> +overwhelming for newcomers to get familiar with all the needed concepts and
>> +learn the subsystem's internals.
> 
> It sounds a bit intimdating to me. Can we give it a positive spin?
>

Pekka also had reservations about this paragraph, so I think that will just
drop it. The goal of having this section was to ease the learning curve but
the way I worded it may reinforce the perception that DRM is hard to learn.

> IMHO we could add a separate section that talks about complexity and 
> provides guidelines about how to deal with it:  trivial HW? use simple 
> pipe;  dedicated VRAM? try TTM;  awkward color formats?  see 
> drm_format_helper.c
>

Indeed. And we can add such section as a follow-up. Maybe referring to some
of the drivers in drivers/gpu/drm/tiny.

Best regards, -- 
Javier Martinez Canillas
Linux Engineering
Red Hat