Amadeusz Sławiński <amadeuszx.slawinski@xxxxxxxxxxxxxxx> 于2022年8月12日周五
23:20写道：
> On 8/11/2022 4:49 PM, Ban Tao wrote:
> > The Allwinner H6 and later SoCs have an DMIC block
> > which is capable of capture.
> >
> > Signed-off-by: Ban Tao <fengzheng923@xxxxxxxxx>
> > ---
>
> ...
>
> > +
> > +#define SUN50I_DMIC_RATES (SNDRV_PCM_RATE_8000_48000)
>
> Seeing supported rates in hw_params callback, you probably want to take
> a look at SNDRV_PCM_RATE_KNOT?
>
No, I don't need SNDRV_PCM_RATE_KNOT. Dmic does not support unknown rates.
>
> > +#define SUN50I_DMIC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |
> SNDRV_PCM_FMTBIT_S24_LE)
> > +
> > +static struct snd_soc_dai_driver sun50i_dmic_dai = {
> > + .capture = {
> > + .channels_min = 1,
> > + .channels_max = 8,
> > + .rates = SUN50I_DMIC_RATES,
> > + .formats = SUN50I_DMIC_FORMATS,
> > + .sig_bits = 21,
> > + },
> > + .probe = sun50i_dmic_soc_dai_probe,
> > + .ops = &sun50i_dmic_dai_ops,
> > + .name = "dmic",
> > +};
> > +
>
> ...
>
>
