[v3,3/9] ASoc: sun4i-i2s: Add 20, 24 and 32 bit support
diff mbox series

Message ID 20181221152110.17982-4-codekipper@gmail.com
State New
Headers show
Series
  • ASoC: sun4i-i2s: Updates to the driver
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Commit Message

Code Kipper Dec. 21, 2018, 3:21 p.m. UTC
From: Marcus Cooper <codekipper@gmail.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@gmail.com>
---
 sound/soc/sunxi/sun4i-i2s.c | 41 ++++++++++++++++++++++++++++++++++---
 1 file changed, 38 insertions(+), 3 deletions(-)

Comments

Chen-Yu Tsai Dec. 21, 2018, 4:48 p.m. UTC | #1
On Fri, Dec 21, 2018 at 11:21 PM <codekipper@gmail.com> wrote:
>
> From: Marcus Cooper <codekipper@gmail.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@gmail.com>
> ---
>  sound/soc/sunxi/sun4i-i2s.c | 41 ++++++++++++++++++++++++++++++++++---
>  1 file changed, 38 insertions(+), 3 deletions(-)
>
> diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> index 80bf29e0cc86..adb988ae9ac5 100644
> --- a/sound/soc/sunxi/sun4i-i2s.c
> +++ b/sound/soc/sunxi/sun4i-i2s.c
> @@ -399,6 +399,11 @@ 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:
> +               width = DMA_SLAVE_BUSWIDTH_4_BYTES;
> +               break;
>         default:
>                 dev_err(dai->dev, "Unsupported physical sample width: %d\n",
>                         params_physical_width(params));
> @@ -411,7 +416,18 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
>                 sr = 0;
>                 wss = 0;
>                 break;
> -
> +       case 20:
> +               sr = 1;
> +               wss = 1;
> +               break;
> +       case 24:
> +               sr = 2;
> +               wss = 2;
> +               break;
> +       case 32:
> +               sr = 4;
> +               wss = 4;
> +               break;
>         default:
>                 dev_err(dai->dev, "Unsupported sample width: %d\n",
>                         params_width(params));
> @@ -687,6 +703,13 @@ 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_3LE | \
> +                        SNDRV_PCM_FMTBIT_S24_LE)

IIRC SNDRV_PCM_FMTBIT_S24_LE and SNDRV_PCM_FMTBIT_S32_LE with .sig_bits = 24
are different things, in regards to how the sample is aligned in a 4 byte
space. Have you checked that things actually work as expected? This was
something that did not work using SNDRV_PCM_FMTBIT_S24_LE on sun4i-codec.

> +
> +#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 = {
> @@ -694,14 +717,14 @@ 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,
> @@ -1106,6 +1129,18 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
>         i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
>         i2s->capture_dma_data.maxburst = 8;
>
> +       soc_dai = devm_kmemdup(&pdev->dev, &sun4i_i2s_dai,
> +                              sizeof(*soc_dai), GFP_KERNEL);
> +       if (!soc_dai) {
> +               ret = -ENOMEM;
> +               goto err_pm_disable;
> +       }
> +
> +       if (i2s->variant->has_fmt_set_lrck_period) {

This condition deserves a comment, particularly as to why you use it
in place of having a separate quirk field to represent 32 bit support.

Regards
ChenYu

> +               soc_dai->playback.formats = SUN8I_FORMATS;
> +               soc_dai->capture.formats = SUN8I_FORMATS;
> +       }
> +
>         pm_runtime_enable(&pdev->dev);
>         if (!pm_runtime_enabled(&pdev->dev)) {
>                 ret = sun4i_i2s_runtime_resume(&pdev->dev);
> --
> 2.20.1
>
Chen-Yu Tsai Dec. 21, 2018, 5:15 p.m. UTC | #2
On Sat, Dec 22, 2018 at 12:48 AM Chen-Yu Tsai <wens@csie.org> wrote:
>
> On Fri, Dec 21, 2018 at 11:21 PM <codekipper@gmail.com> wrote:
> >
> > From: Marcus Cooper <codekipper@gmail.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@gmail.com>
> > ---
> >  sound/soc/sunxi/sun4i-i2s.c | 41 ++++++++++++++++++++++++++++++++++---
> >  1 file changed, 38 insertions(+), 3 deletions(-)
> >
> > diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> > index 80bf29e0cc86..adb988ae9ac5 100644
> > --- a/sound/soc/sunxi/sun4i-i2s.c
> > +++ b/sound/soc/sunxi/sun4i-i2s.c
> > @@ -399,6 +399,11 @@ 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:
> > +               width = DMA_SLAVE_BUSWIDTH_4_BYTES;
> > +               break;
> >         default:
> >                 dev_err(dai->dev, "Unsupported physical sample width: %d\n",
> >                         params_physical_width(params));
> > @@ -411,7 +416,18 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
> >                 sr = 0;
> >                 wss = 0;
> >                 break;
> > -
> > +       case 20:
> > +               sr = 1;
> > +               wss = 1;
> > +               break;
> > +       case 24:
> > +               sr = 2;
> > +               wss = 2;
> > +               break;
> > +       case 32:
> > +               sr = 4;
> > +               wss = 4;
> > +               break;
> >         default:
> >                 dev_err(dai->dev, "Unsupported sample width: %d\n",
> >                         params_width(params));
> > @@ -687,6 +703,13 @@ 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_3LE | \
> > +                        SNDRV_PCM_FMTBIT_S24_LE)
>
> IIRC SNDRV_PCM_FMTBIT_S24_LE and SNDRV_PCM_FMTBIT_S32_LE with .sig_bits = 24
> are different things, in regards to how the sample is aligned in a 4 byte
> space. Have you checked that things actually work as expected? This was
> something that did not work using SNDRV_PCM_FMTBIT_S24_LE on sun4i-codec.

OK. I see the I2S driver is using FIFO mode 1, which expects the sample
to be in the lower portion of the 4 bytes. However it looks like you would
want SNDRV_PCM_FMTBIT_S20_LE (20 bits LSB justified in 4 bytes) instead of
SNDRV_PCM_FMTBIT_S20_3LE (20 bits LSB justified in 3 bytes).

ChenYu


> > +
> > +#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 = {
> > @@ -694,14 +717,14 @@ 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,
> > @@ -1106,6 +1129,18 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
> >         i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
> >         i2s->capture_dma_data.maxburst = 8;
> >
> > +       soc_dai = devm_kmemdup(&pdev->dev, &sun4i_i2s_dai,
> > +                              sizeof(*soc_dai), GFP_KERNEL);
> > +       if (!soc_dai) {
> > +               ret = -ENOMEM;
> > +               goto err_pm_disable;
> > +       }
> > +
> > +       if (i2s->variant->has_fmt_set_lrck_period) {
>
> This condition deserves a comment, particularly as to why you use it
> in place of having a separate quirk field to represent 32 bit support.
>
> Regards
> ChenYu
>
> > +               soc_dai->playback.formats = SUN8I_FORMATS;
> > +               soc_dai->capture.formats = SUN8I_FORMATS;
> > +       }
> > +
> >         pm_runtime_enable(&pdev->dev);
> >         if (!pm_runtime_enabled(&pdev->dev)) {
> >                 ret = sun4i_i2s_runtime_resume(&pdev->dev);
> > --
> > 2.20.1
> >

Patch
diff mbox series

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 80bf29e0cc86..adb988ae9ac5 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -399,6 +399,11 @@  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:
+		width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+		break;
 	default:
 		dev_err(dai->dev, "Unsupported physical sample width: %d\n",
 			params_physical_width(params));
@@ -411,7 +416,18 @@  static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
 		sr = 0;
 		wss = 0;
 		break;
-
+	case 20:
+		sr = 1;
+		wss = 1;
+		break;
+	case 24:
+		sr = 2;
+		wss = 2;
+		break;
+	case 32:
+		sr = 4;
+		wss = 4;
+		break;
 	default:
 		dev_err(dai->dev, "Unsupported sample width: %d\n",
 			params_width(params));
@@ -687,6 +703,13 @@  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_3LE | \
+			 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 = {
@@ -694,14 +717,14 @@  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,
@@ -1106,6 +1129,18 @@  static int sun4i_i2s_probe(struct platform_device *pdev)
 	i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
 	i2s->capture_dma_data.maxburst = 8;
 
+	soc_dai = devm_kmemdup(&pdev->dev, &sun4i_i2s_dai,
+			       sizeof(*soc_dai), GFP_KERNEL);
+	if (!soc_dai) {
+		ret = -ENOMEM;
+		goto err_pm_disable;
+	}
+
+	if (i2s->variant->has_fmt_set_lrck_period) {
+		soc_dai->playback.formats = SUN8I_FORMATS;
+		soc_dai->capture.formats = SUN8I_FORMATS;
+	}
+
 	pm_runtime_enable(&pdev->dev);
 	if (!pm_runtime_enabled(&pdev->dev)) {
 		ret = sun4i_i2s_runtime_resume(&pdev->dev);