linux-kernel - Re: [linux-sunxi] [PATCH v5 14/15] ASoc: sun4i-i2s: Add 20, 24 and 32 bit support

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Date:   Wed, 14 Aug 2019 11:03:39 +0200
From:   Code Kipper <codekipper@...il.com>
To:     Jernej Škrabec <jernej.skrabec@...il.com>
Cc:     linux-sunxi <linux-sunxi@...glegroups.com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        "Andrea Venturi (pers)" <be17068@...rbole.bo.it>
Subject: Re: [linux-sunxi] [PATCH v5 14/15] ASoc: sun4i-i2s: Add 20, 24 and 32
 bit support

On Wed, 14 Aug 2019 at 10:28, Jernej Škrabec <jernej.skrabec@...il.com> wrote:
>
> Hi!
>
> Dne sreda, 14. avgust 2019 ob 08:08:53 CEST je codekipper@...il.com
> napisal(a):
> > From: Marcus Cooper <codekipper@...il.com>
> >
> > Extend the functionality of the driver to include support of 20 and
> > 24 bits per sample for the earlier SoCs.
> >
> > Newer SoCs can also handle 32bit samples.
> >
> > Signed-off-by: Marcus Cooper <codekipper@...il.com>
> > ---
> >  sound/soc/sunxi/sun4i-i2s.c | 21 +++++++++++++++++++--
> >  1 file changed, 19 insertions(+), 2 deletions(-)
> >
> > diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> > index a71969167053..d3c8789f70bb 100644
> > --- a/sound/soc/sunxi/sun4i-i2s.c
> > +++ b/sound/soc/sunxi/sun4i-i2s.c
> > @@ -690,6 +690,11 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream
> > *substream, case 16:
> >               width = DMA_SLAVE_BUSWIDTH_2_BYTES;
> >               break;
> > +     case 20:
> > +     case 24:
> > +     case 32:
>
> params_physical_width() returns 32 also for 20 and 24-bit formats, so drop 20
> and 24.
ACK
>
> Best regards,
> Jernej
>
> > +             width = DMA_SLAVE_BUSWIDTH_4_BYTES;
> > +             break;
> >       default:
> >               dev_err(dai->dev, "Unsupported physical sample width:
> %d\n",
> >                       params_physical_width(params));
> > @@ -1015,6 +1020,13 @@ static int sun4i_i2s_dai_probe(struct snd_soc_dai
> > *dai) return 0;
> >  }
> >
> > +#define SUN4I_FORMATS        (SNDRV_PCM_FMTBIT_S16_LE | \
> > +                      SNDRV_PCM_FMTBIT_S20_LE | \
> > +                      SNDRV_PCM_FMTBIT_S24_LE)
> > +
> > +#define SUN8I_FORMATS        (SUN4I_FORMATS | \
> > +                      SNDRV_PCM_FMTBIT_S32_LE)
> > +
> >  static struct snd_soc_dai_driver sun4i_i2s_dai = {
> >       .probe = sun4i_i2s_dai_probe,
> >       .capture = {
> > @@ -1022,14 +1034,14 @@ static struct snd_soc_dai_driver sun4i_i2s_dai = {
> >               .channels_min = 2,
> >               .channels_max = 2,
> >               .rates = SNDRV_PCM_RATE_8000_192000,
> > -             .formats = SNDRV_PCM_FMTBIT_S16_LE,
> > +             .formats = SUN4I_FORMATS,
> >       },
> >       .playback = {
> >               .stream_name = "Playback",
> >               .channels_min = 2,
> >               .channels_max = 2,
> >               .rates = SNDRV_PCM_RATE_8000_192000,
> > -             .formats = SNDRV_PCM_FMTBIT_S16_LE,
> > +             .formats = SUN4I_FORMATS,
> >       },
> >       .ops = &sun4i_i2s_dai_ops,
> >       .symmetric_rates = 1,
> > @@ -1505,6 +1517,11 @@ static int sun4i_i2s_probe(struct platform_device
> > *pdev) goto err_pm_disable;
> >       }
> >
> > +     if (i2s->variant->has_fmt_set_lrck_period) {
> > +             soc_dai->playback.formats = SUN8I_FORMATS;
> > +             soc_dai->capture.formats = SUN8I_FORMATS;
> > +     }
> > +
> >       if (!of_property_read_u32(pdev->dev.of_node,
> >                                 "allwinner,playback-channels",
> &val)) {
> >               if (val >= 2 && val <= 8)
>
>
>
>