[v4,8/9] ASoc: sun4i-i2s: Add 20, 24 and 32 bit support
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Message ID 20190603174735.21002-9-codekipper@gmail.com
State New
Headers show
Series
  • ASoC: sun4i-i2s: Updates to the driver
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Commit Message

Code Kipper June 3, 2019, 5:47 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 | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

Comments

Maxime Ripard June 4, 2019, 8:19 a.m. UTC | #1
On Mon, Jun 03, 2019 at 07:47:34PM +0200, 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 | 34 +++++++++++++++++++++++++++++++---
>  1 file changed, 31 insertions(+), 3 deletions(-)
>
> diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> index 3549a87ed9e9..351b8021173b 100644
> --- a/sound/soc/sunxi/sun4i-i2s.c
> +++ b/sound/soc/sunxi/sun4i-i2s.c
> @@ -428,6 +428,11 @@ 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;

Doesn't this test the physical width? If so, then I'm not sure that 20
even exists, and that we can support 24.

>  	default:
>  		dev_err(dai->dev, "Unsupported physical sample width: %d\n",
>  			params_physical_width(params));
> @@ -440,7 +445,18 @@ 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;

This doesn't really works, wss being the slot size, and you can have a
different slot size and sample size. I have a patch that reworks this,
I'll send it.

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Patch
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diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 3549a87ed9e9..351b8021173b 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -428,6 +428,11 @@  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));
@@ -440,7 +445,18 @@  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));
@@ -722,6 +738,13 @@  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 = {
@@ -729,14 +752,14 @@  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,
@@ -1161,6 +1184,11 @@  static int sun4i_i2s_probe(struct platform_device *pdev)
 		goto err_pm_disable;
 	}
 
+	if (i2s->variant->is_h3_i2s_based) {
+		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)