linux-kernel - Re: [alsa-devel] [PATCH 1/1] ASoC: soc-pcm: DPCM cares BE channel constraint

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Message-ID: <20180626141837.GF1779@sirena.org.uk>
Date:   Tue, 26 Jun 2018 15:18:37 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     jiada_wang@...tor.com, lgirdwood@...il.com, perex@...ex.cz,
        tiwai@...e.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH 1/1] ASoC: soc-pcm: DPCM cares BE channel
 constraint

On Tue, Jun 26, 2018 at 02:08:40PM +0200, Jerome Brunet wrote:

> From comment here and in other mails, I get that you are not big fan of DPCM :)
> It is indeed a complex beast ...

> It there anything else we can use to represent audio routing within the SoC ?
> The SoC I'm working on make heavy use of this, unfortunately. 

The goal is to be able to propagate digital configuration along audio
paths in much the same way as we currently do for power with DAPM.  Lars
did a presentation with a good writeup of a proposal for that at ELC-E a
few years ago.  Unfortunately the only person that is really able to
find time to work on this at the minute is Morimoto-san, this is what
his componentization changes are driving towards - part of the design is
that everything in the system will be a component and we can therefore
treat every device identically.

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