linux-kernel - Re: [PATCH 0/2] ASoC: qdsp6: fix default FE dais and routings.

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Date:   Fri, 17 Apr 2020 14:09:57 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Stephan Gerhold <stephan@...hold.net>,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        lgirdwood@...il.com
Subject: Re: [PATCH 0/2] ASoC: qdsp6: fix default FE dais and routings.

On Fri, Apr 17, 2020 at 02:02:08PM +0100, Srinivas Kandagatla wrote:
> On 17/04/2020 12:24, Stephan Gerhold wrote:

> > but IMO the FE DAIs are a negligible overhead compared to the routing
> > matrix and the many BE DAIs that are really never going to be used
> > (because nothing is physically connected to the ports).

> Two things, one unnecessary mixers, second thing is we need to know how many
> FE dais are in the system, which should be derived from the number of dai
> child nodes. These can potentially be SoC specific or firmware specific.

You shouldn't be worrying about unused mixers, ideally we'd be walking
the DAPM graph and masking things - this isn't something that should be
open coded at individual driver levels.

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