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Date:   Thu, 07 Jul 2022 10:53:05 +0100
From:   Paul Cercueil <paul@crapouillou.net>
Subject: Re: [PATCH 10/11] ASoC: jz4740-i2s: Support S20_LE and S24_LE sample
 formats
To:     Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Cc:     lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
        tiwai@suse.com, linux-mips@vger.kernel.org,
        alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
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Le mer., juil. 6 2022 at 22:13:29 +0100, Aidan MacDonald=20
<aidanmacdonald.0x0@gmail.com> a =E9crit :
> The audio controller on JZ47xx SoCs supports 20- and 24-bit
> samples coming from memory. Allow those formats to be used
> with the I2S driver.
>=20
> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
> ---
>  sound/soc/jz4740/jz4740-i2s.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
>=20
> diff --git a/sound/soc/jz4740/jz4740-i2s.c=20
> b/sound/soc/jz4740/jz4740-i2s.c
> index 80b355d715ce..ee99c5e781ec 100644
> --- a/sound/soc/jz4740/jz4740-i2s.c
> +++ b/sound/soc/jz4740/jz4740-i2s.c
> @@ -222,9 +222,15 @@ static int jz4740_i2s_hw_params(struct=20
> snd_pcm_substream *substream,
>  	case SNDRV_PCM_FORMAT_S8:
>  		sample_size =3D 0;
>  		break;
> -	case SNDRV_PCM_FORMAT_S16:
> +	case SNDRV_PCM_FORMAT_S16_LE:
>  		sample_size =3D 1;
>  		break;
> +	case SNDRV_PCM_FORMAT_S20_LE:
> +		sample_size =3D 3;
> +		break;
> +	case SNDRV_PCM_FORMAT_S24_LE:
> +		sample_size =3D 4;
> +		break;

Did you test these? It is unclear to me, looking at the JZ4740 PM, if=20
the 18-bit, 20-bit and 24-bit samples are in 4 bytes or 3 bytes.

Cheers,
-Paul

>  	default:
>  		return -EINVAL;
>  	}
> @@ -362,7 +368,9 @@ static const struct snd_soc_dai_ops=20
> jz4740_i2s_dai_ops =3D {
>  };
>=20
>  #define JZ4740_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
> -		SNDRV_PCM_FMTBIT_S16_LE)
> +			 SNDRV_PCM_FMTBIT_S16_LE | \
> +			 SNDRV_PCM_FMTBIT_S20_LE | \
> +			 SNDRV_PCM_FMTBIT_S24_LE)
>=20
>  static struct snd_soc_dai_driver jz4740_i2s_dai =3D {
>  	.probe =3D jz4740_i2s_dai_probe,
> --
> 2.35.1
>=20