Re: [PATCH v9 01/14] ASoC: sun4i-i2s: Change set_chan_cfg() params

[Clément Péron]

Hi Pierre-Louis,

On Tue, 27 Oct 2020 at 19:59, Pierre-Louis Bossart
<pierre-louis.bossart@xxxxxxxxxxxxxxx> wrote:
>
>
> > @@ -452,11 +454,11 @@ static int sun8i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
> >       case SND_SOC_DAIFMT_DSP_B:
> >       case SND_SOC_DAIFMT_LEFT_J:
> >       case SND_SOC_DAIFMT_RIGHT_J:
> > -             lrck_period = params_physical_width(params) * slots;
> > +             lrck_period = slot_width * slots;
> >               break;
> >
> >       case SND_SOC_DAIFMT_I2S:
> > -             lrck_period = params_physical_width(params);
> > +             lrck_period = slot_width;
> >               break;
>
> Aren't I2S, LEFT_J and RIGHT_J pretty much the same in terms of lrclk
> rate/period? the only thing that can change is the polarity, no?
>
> Not sure why it's handled differently here?

I just had a look at the User Manual for H3 and H6 and I didn't find
any reason why LEFT_J and RIGHT_J should be computed in a different
way as I2S.

Also the commit introducing this doesn't mention it.
7ae7834ec446 ("ASoC: sun4i-i2s: Add support for DSP formats")

I can't test it with my board but if nobody complains about it, I will
introduce a fix for this in the next version and change this also for
H6.

Thanks for your review,
Clement