linux-kernel - Re: [Nouveau] [PATCH v7 22/23] drm/vc4: vec: Add support for more analog TV standards

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Message-ID: <20221110103914.hsft4tacop6zerem@houat>
Date:   Thu, 10 Nov 2022 11:39:14 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Lukas Satin <luke.satin@...il.com>
Cc:     kfyatek+publicgit@...il.com,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Samuel Holland <samuel@...lland.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Emma Anholt <emma@...olt.net>,
        Karol Herbst <kherbst@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>, Chen-Yu Tsai <wens@...e.org>,
        Lyude Paul <lyude@...hat.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Dom Cobley <dom@...pberrypi.com>,
        nouveau@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-sunxi@...ts.linux.dev, Hans de Goede <hdegoede@...hat.com>,
        Noralf Trønnes <noralf@...nnes.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Phil Elwell <phil@...pberrypi.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [Nouveau] [PATCH v7 22/23] drm/vc4: vec: Add support for more
 analog TV standards

On Wed, Nov 09, 2022 at 05:55:36PM +0100, Lukas Satin wrote:
> That's great, I will test it on Ubuntu + Nouveau x86_64 and Batocera-Linux.
> 
> I'm not interested in Raspberry Pi. I see you have some commit in
> RaspberryPi/Linux. Will this go to some Nouveau driver, so I can test it on
> x86_64 machine? I have some basic experience compiling Linux kernel (nvidia
> driver) from 10 years ago.

Nouveau is only marginally affected by this patch series. It could
leverage the work done here, but it's not part of it and I won't plan to
work on it.

The RaspberryPi is mentioned because it's the platform that will benefit
the most from it, and the main target of that series.

> Scaling is not the way to go because I do this to not use scaling. I could
> use 640x480 and scale 320x240 to that mode, right? That is what old
> retrogaming laptop LCD screens do (you can even enable this in their BIOS).
> 
> More appropriate is to preserve pixel ratio and have some border. So you
> mostly select the closest resolution and live with small border on the
> edge. Then you can crop it on analog TV using real world dials :-)
> 
> I joined Nouveau developer list here. I don't know why we have like 40
> email recipients here and now we discuss Raspberry.

Nouveau is marginally affected by it, so its mailing list is in Cc.

Maxime

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