Re: [PATCH v2 2/2] ASoC: qcom: sc7180: Modify machine driver for 2mic

[Ajye Huang]

On Fri, Oct 30, 2020 at 5:23 PM Tzung-Bi Shih <tzungbi@xxxxxxxxxx> wrote:
>
> On Fri, Oct 30, 2020 at 3:57 PM Ajye Huang <ajye.huang@xxxxxxxxx> wrote:
> > +static struct gpio_desc *dmic_sel;
> > +static int dmic_switch;
>
> If you really need them, you should put them in struct sc7180_snd_data.
>
Thank you, I will do it.
> > +static int dmic_set(struct snd_kcontrol *kcontrol,
> > +                   struct snd_ctl_elem_value *ucontrol)
> > +{
> > +       if (dmic_sel) {
>
> if (IS_ERR(dmic_sel))
> But I think you don't need to check dmic_sel.  Suppose your _probe()
> already returned error, the code here shouldn't be called.
>
OK, I will remove the discriminant if (dmic_sel) {
> > +               dmic_switch = ucontrol->value.integer.value[0];
>
> Looks like it can be a local variable.  You don't need to save dmic_switch.
But dmic_get() will need dmic_switch, should i keep dmic_switch?
static int dmic_get(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = dmic_switch;
return 0;
}