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

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Message-ID: <67328e51035e4eb5a6a78c3156e5d11f@realtek.com>
Date:   Thu, 30 Jan 2020 04:30:57 +0000
From:   Oder Chiou <oder_chiou@...ltek.com>
To:     Sameer Pujar <spujar@...dia.com>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "perex@...ex.cz" <perex@...ex.cz>
CC:     "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

Acked-by: Oder Chiou <oder_chiou@...ltek.com>

> -----Original Message-----
> From: Sameer Pujar [mailto:spujar@...dia.com]
> Sent: Wednesday, January 22, 2020 6:27 PM
> To: Oder Chiou; 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
> 
> Hi Reviewers,
> 
> Kindly review. Thanks.
> 
> On 1/20/2020 11:54 AM, Sameer Pujar wrote:
> > 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,
> 
> 
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