linux-kernel - Re: [PATCH 4/4] ASoC: simple-card: Add support for codec-to-codec dai

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Date:   Thu, 13 Feb 2020 11:38:46 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     Samuel Holland <samuel@...lland.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Jonathan Corbet <corbet@....net>, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH 4/4] ASoC: simple-card: Add support for codec-to-codec
 dai_links

On Thu, Feb 13, 2020 at 10:18:53AM +0100, Jerome Brunet wrote:
> On Thu 13 Feb 2020 at 07:11, Samuel Holland <samuel@...lland.org> wrote:

> > +- codec-to-codec			: Indicates a codec-to-codec
> > dai-link.

> I wonder if such property could be viewed as a Linux implementation
> detail ?

Yes, it is.

> Should the card figure out the codec-to-codec links on its own or is it
> something generic enough to put in DT ?

We should be able to figure it out by ourselves, we already have a link
between two CODECs - we should be able to infer that it is in fact a
link between two CODECs with the information we already have, probably
by looking at the two devices that are referenced.

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