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

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Message-ID: <4297791.2mJM636zur@jernej-laptop>
Date:   Wed, 14 Aug 2019 10:28:39 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     linux-sunxi@...glegroups.com, codekipper@...il.com
Cc:     maxime.ripard@...e-electrons.com, wens@...e.org,
        linux-arm-kernel@...ts.infradead.org, lgirdwood@...il.com,
        broonie@...nel.org, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org, be17068@...rbole.bo.it
Subject: Re: [linux-sunxi] [PATCH v5 14/15] ASoc: sun4i-i2s: Add 20, 24 and 32 bit support

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.

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)