linux-kernel - Re: [PATCH v1 1/3] ASoC: qcom: common: set codecless link to be a backend

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Message-ID: <4a85f858-5350-403f-a862-9966f542d3b6@sirena.org.uk>
Date: Mon, 16 Dec 2024 21:48:59 +0000
From: Mark Brown <broonie@...nel.org>
To: Alexey Klimov <alexey.klimov@...aro.org>
Cc: konradybcio@...nel.org, andersson@...nel.org,
	srinivas.kandagatla@...aro.org, tiwai@...e.com, lgirdwood@...il.com,
	perex@...ex.cz, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, dmitry.baryshkov@...aro.org,
	linux-sound@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/3] ASoC: qcom: common: set codecless link to be a
 backend

On Thu, Dec 05, 2024 at 02:33:42AM +0000, Alexey Klimov wrote:
> When codec subnode is missing in DAI link description in DT
> the DAI link codec will be set to a dummy codec and link will be
> recognised as front end. Any playback attempt will fail since it
> will not be able to install hardware parameters. Fix this by
> setting codecless link to be a back end.

This is intentional, the sound card should be properly described in the
DT - if there's an expansion board used the description for that should
say what sort of CODEC is there.

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