linux-kernel - Re: [PATCH] ASoC: rt5659: add S32

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Message-ID: <74a42452-f19c-1175-9928-da12ccad621d@nvidia.com>
Date:   Mon, 20 Jan 2020 11:54:30 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     <oder_chiou@...ltek.com>, <tiwai@...e.com>, <perex@...ex.cz>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: rt5659: add S32_LE format

Removing Bard(bardliao@...ltek.com) from "to" list since I am getting 
undelivered message.

Oder,
Please add right folks as you feel necessary. Thanks.

On 1/20/2020 11:47 AM, Sameer Pujar wrote:
> ALC5659 supports maximum data length of 24-bit. Currently driver supports
> S24_LE which is a 32-bit container with valid data in [23:0] and 0s in MSB.
> S24_3LE is not commonly used and is hard to find audio streams with this
> format. Also many SoC HW do not support S24_LE and S32_LE is used in
> general. The 24-bit data can be represented in S32_LE [31:8] and 0s are
> padded in LSB.
>
> This patch adds S32_LE to ALC5659 driver and data length for this is set
> to 24 as per codec's maximum data length support. This helps to play
> 24-bit audio, packed in S32_LE, on HW which do not support S24_LE.
>
> Signed-off-by: Sameer Pujar <spujar@...dia.com>
> ---
>   sound/soc/codecs/rt5659.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/sound/soc/codecs/rt5659.c b/sound/soc/codecs/rt5659.c
> index fc74dd63..f910ddf 100644
> --- a/sound/soc/codecs/rt5659.c
> +++ b/sound/soc/codecs/rt5659.c
> @@ -3339,6 +3339,7 @@ static int rt5659_hw_params(struct snd_pcm_substream *substream,
>   		val_len |= RT5659_I2S_DL_20;
>   		break;
>   	case 24:
> +	case 32:
>   		val_len |= RT5659_I2S_DL_24;
>   		break;
>   	case 8:
> @@ -3733,7 +3734,8 @@ static int rt5659_resume(struct snd_soc_component *component)
>   
>   #define RT5659_STEREO_RATES SNDRV_PCM_RATE_8000_192000
>   #define RT5659_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
> -		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S8)
> +		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE | \
> +		SNDRV_PCM_FMTBIT_S8)
>   
>   static const struct snd_soc_dai_ops rt5659_aif_dai_ops = {
>   	.hw_params = rt5659_hw_params,