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

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Date:   Fri, 31 Jan 2020 08:50:52 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     Oder Chiou <oder_chiou@...ltek.com>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "perex@...ex.cz" <perex@...ex.cz>
CC:     <spujar@...dia.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: rt5659: add S32_LE format



On 1/30/2020 10:00 AM, Oder Chiou wrote:
> External email: Use caution opening links or attachments
>
>
> Acked-by: Oder Chiou <oder_chiou@...ltek.com>

Request maintainers to consider this patch for approval. Thanks in advance.

. . .
>>>> 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,
>>
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