linux-kernel - Re: [PATCH] ASoC: simple-card: Add dummy dai support simple sound card

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Message-ID: <20210225131533.GA5332@sirena.org.uk>
Date:   Thu, 25 Feb 2021 13:15:33 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        pierre-louis.bossart@...ux.intel.com, stephan@...hold.net,
        guennadi.liakhovetski@...ux.intel.com,
        kai.vehmanen@...ux.intel.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: simple-card: Add dummy dai support simple sound
 card

On Thu, Feb 25, 2021 at 08:08:32PM +0800, Shengjiu Wang wrote:

> If sound card doesn't need specific codec device, just
> dummy codec is enough, then we can link the dummy component
> directly.

This is a big red flag - what circumstances are these?  If it's a simple
CODEC with no control then the general approach is to provide a driver
which announces the capabilities of the CODEC and can be bound to as
normal, the dummy component should never actively be used.

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