linux-kernel - Re: [ PATCH v2 3/3] ASoC: dt-bindings: Add support for Loongson audio card

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Message-ID: <20230613-crewmate-levitate-597ab96ea2d7@wendy>
Date:   Tue, 13 Jun 2023 15:29:33 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Mark Brown <broonie@...nel.org>
CC:     Yingkun Meng <mengyingkun@...ngson.cn>,
        Conor Dooley <conor@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <robh+dt@...nel.org>,
        <conor+dt@...nel.org>, <lgirdwood@...il.com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <alsa-devel@...a-project.org>, <loongarch@...ts.linux.dev>,
        <loongson-kernel@...ts.loongnix.cn>
Subject: Re: [ PATCH v2 3/3] ASoC: dt-bindings: Add support for Loongson
 audio card

On Tue, Jun 13, 2023 at 02:54:36PM +0100, Mark Brown wrote:
> On Tue, Jun 13, 2023 at 01:46:41PM +0100, Conor Dooley wrote:
> 
> > So it is entirely a software construct? Why does it need a dt-binding
> > then? Your commit message says the controller is present on the device!
> 
> A typical embedded (or power efficient laptop) audio design will consist
> of multiple devices connected together (frequently via non-control
> buses) together with system level passive components and plastics which
> are also important to the audio configuration.  A card binding describes
> the interconections between the devices in the system and provides
> identification information for the audio subsystem.  This system level
> audio integration is a physical thing that can be pointed at that
> requires real software control.

The bit you were responding to with that was a disingenuous question.
Probably not fair of me to ask one of a non-native speaker like that,
when all I wanted to know was whether it was appropriate not to add
a more specific compatible, or whether this was something invariant.

> Like I said before please look at the existing audio card bindings.

Yah, ofc I did that to see if there were other similar bindings that
used specific compatibles...


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