On Fri, Apr 02, 2021 at 12:36:43PM +0900, Steve Lee wrote:

> +	SOC_SINGLE("Tx Enable Selection", MAX98390_PCM_TX_EN_A,
> +		0, 255, 0),

I'm not clear what this is (especially given the source selection below)
but it looks like it should be a mute control?

> +	SOC_SINGLE("Tx Hiz Selection", MAX98390_PCM_TX_HIZ_CTRL_A,
> +		0, 255, 0),

This I'd expect to be tied into machine driver configuration, either DT
properties or TDM slot configuration - it's not something that looks
like it's something you'd want to control at runtime.

> +	SOC_SINGLE("Tx Source Selection", MAX98390_PCM_CH_SRC_2,
> +		0, 255, 0),

This looks like it should be a DAPM control or possibly a TDM slot
configuration - look at how the Arizona devices handle routing from
multiple TDM slots for the DAPM version.