Re: [PATCH v1 1/2] ASoC: dt-bindings: Document dmic_sel-gpios optional prop for two DMICs case

[Rob Herring]

On Fri, Oct 28, 2022 at 12:56:16PM +0100, Mark Brown wrote:
> On Fri, Oct 28, 2022 at 06:24:49PM +0800, Ajye Huang wrote:
> > Document dmic_sel-gpios optional prop for switching between two DMICs.
> > Ex, the GPIO can control a MUX to select Front or Rear dmic.
> 
> > +  dmic_sel-gpios:

s/_/-/

> > +    maxItems: 1
> > +    description: GPIO for switching between DMICs, ex Front/Rear dmic
> > +
> 
> If we're going to do this we should also allow the bindings to label the
> mics appropriately so that the control presented can reflect the actual
> hardware.  It does feel like it might fit better to do this separately
> to the DMIC driver as a mux between the DMIC and the DAI it's connected
> to but equally with the way things are at the minute that feels like
> it's probably disproportionate effort.

Are there other needs for DAI muxes? We already have a mux binding, so 
defining a DAI mux would work for any type of muxing control, not just 
GPIO.

Rob