Re: [PATCH v1 2/2] ASoC: dmic: Add optional dmic selection

[Mark Brown]

On Fri, Oct 28, 2022 at 06:24:50PM +0800, Ajye Huang wrote:

> +	dmic->dmic_sel = devm_gpiod_get_optional(component->dev,
> +						"dmic_sel", GPIOD_OUT_LOW);
> +	if (IS_ERR(dmic->dmic_sel))
> +		return PTR_ERR(dmic->dmic_sel);
> +
>  	snd_soc_component_set_drvdata(component, dmic);
>  
>  	return 0;
> @@ -125,10 +172,15 @@ static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
>  			       SND_SOC_NOPM, 0, 0, dmic_aif_event,
>  			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
>  	SND_SOC_DAPM_INPUT("DMic"),
> +	SND_SOC_DAPM_MIC("DMIC", NULL),
> +	SND_SOC_DAPM_MUX("Dmic Mux", SND_SOC_NOPM, 0, 0, &dmic_mux_control),

If we are doing this then adding the mux needs to be conditional on
having the GPIO, without the GPIO the control is at best confusing to
users.

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