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From:   Emil Renner Berthing <emil.renner.berthing@canonical.com>
Date:   Tue, 25 Apr 2023 22:57:23 +0200
Message-ID: <CAJM55Z9a9N8Zm2cuh8gzZNcYBENO5WE6GmRXOsaYbOcv0srz-Q@mail.gmail.com>
Subject: Re: [PATCH v2 4/4] riscv: dts: starfive: add tdm node and sound card
To:     Conor Dooley <conor@kernel.org>
Cc:     Walker Chen <walker.chen@starfivetech.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor.dooley@microchip.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>, alsa-devel@alsa-project.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-riscv@lists.infradead.org
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On Mon, 24 Apr 2023 at 18:27, Conor Dooley <conor@kernel.org> wrote:
> On Mon, Apr 24, 2023 at 11:21:11AM +0800, Walker Chen wrote:
> >
> >
> > On 2023/4/22 0:50, Conor Dooley wrote:
> > > Hey Walker,
> > >
> > > On Thu, Apr 20, 2023 at 10:41:18AM +0800, Walker Chen wrote:
> > >> Add the tdm controller node and sound card for the StarFive JH7110 SoC.
> > >
> > > Is this one of these waveshare things + a visionfive 2?
> > > https://www.waveshare.com/wm8960-audio-hat.htm
> >
> > Hey Conor,
> > I'm glad to receive your comments.
> >
> > Now we are using this board + VisionFive2 :
> > https://wiki.seeedstudio.com/ReSpeaker_2_Mics_Pi_HAT/
> >
> > >
> > > I'm a bit lost as to why this needs a whole new board, should it not
> > > just be an overlay that you can apply to the existing dts?
> > >
> > > Taking this to an extreme, should I expect to see a new devicetree for
> > > everything RPi hat that you decide to use with a VisionFive 2?
> >
> > For your response, I did some thinking. Because wm8960 codec is not integrated
> >  on the VisionFive2 board, perhaps using overlay is a better way.
>
> Aye. I think so too. From my PoV, if this particular seeed audio board
> is something you're bundling with VisionFive 2 boards on your storefront
> etc, then I'm fine with taking it as an in-tree overlay.
> If it is just a "random" RPi hat (that happens to be exactly what you
> need for testing the audio drivers), then I don't know where to draw a
> line for what is & what is not acceptable for inclusion.
>
> In both cases, it's Emil's call.

I'm not aware of any shop bundling the VF2 with an audio board. I
agree: please don't add device trees for combinations of VF2s and
hats. That should be an overlay.

/Emil

> > > Also, it'd be nice to provide a Link: to where someone can find more
> > > info on this combination of items. Google for "wm8960 visionfive 2"
> > > gives me nothing, nor does "starfive audio card" etc.
>