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

[Ajye Huang]

Hi Mark Brown,

Thank you for review,
I think it is appropriate to implement on audio machine side, like
this I did before,
commit 3cfbf07c6d27
("ASoC: qcom: sc7180: Modify machine driver for 2mic")

What is your suggestion?  Thank you.

On Fri, Oct 28, 2022 at 7:58 PM Mark Brown <broonie at kernel.org> wrote:
>
> 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.