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Message-ID: <YuKbpXVOeGn2l2gd@sirena.org.uk>
Date:   Thu, 28 Jul 2022 15:22:29 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
Cc:     agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        robh+dt@...nel.org, quic_plai@...cinc.com, bgoswami@...cinc.com,
        perex@...ex.cz, tiwai@...e.com, srinivas.kandagatla@...aro.org,
        quic_rohkumar@...cinc.com, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        swboyd@...omium.org, judyhsiao@...omium.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2] ASoC: qcom: SC7280: Add support for external DMIC
 bias supply

On Thu, Jul 28, 2022 at 07:29:49PM +0530, Srinivasa Rao Mandadapu wrote:
> Update SC7280 machine driver for enabling external dmic bias supply,
> which is required for villager evt boards.

> +++ b/sound/soc/qcom/sc7280.c
> @@ -356,6 +356,7 @@ static const struct snd_soc_ops sc7280_ops = {
>  static const struct snd_soc_dapm_widget sc7280_snd_widgets[] = {
>  	SND_SOC_DAPM_HP("Headphone Jack", NULL),
>  	SND_SOC_DAPM_MIC("Headset Mic", NULL),
> +	SND_SOC_DAPM_REGULATOR_SUPPLY("DMICVDD", 0, 0),
>  };
>  
>  static int sc7280_snd_platform_probe(struct platform_device *pdev)

Don't you want to connect this to something?  This won't do anything
as-is.  I can't see any references to DMICVDD which might be failing to
resolve in the current sound/soc/qcom.

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