From 0d99d2b036974ed1160f9d10457b6054646fb7d6 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Wed, 22 Dec 2010 10:45:18 +0200 Subject: [PATCH] ASoC: tlv320dac33: Add 32/24 bit audio support Add support for 24 bit audio (with S32_LE msbits 24). The reason to limit the msbits to 24, is that the FIFO can be configured for 16 or 24 bit layout. It is unknown how the codec would downsample from 32 to 24 bit, if the interface is configured to receive 32 bit data. Signed-off-by: Peter Ujfalusi Acked-by: Mark Brown Signed-off-by: Liam Girdwood --- sound/soc/codecs/tlv320dac33.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c index 05a4e9fade47..13d521cfe393 100644 --- a/sound/soc/codecs/tlv320dac33.c +++ b/sound/soc/codecs/tlv320dac33.c @@ -764,6 +764,8 @@ static int dac33_startup(struct snd_pcm_substream *substream, /* Stream started, save the substream pointer */ dac33->substream = substream; + snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24); + return 0; } @@ -803,6 +805,10 @@ static int dac33_hw_params(struct snd_pcm_substream *substream, dac33->fifo_size = DAC33_FIFO_SIZE_16BIT; dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32); break; + case SNDRV_PCM_FORMAT_S32_LE: + dac33->fifo_size = DAC33_FIFO_SIZE_24BIT; + dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64); + break; default: dev_err(codec->dev, "unsupported format %d\n", params_format(params)); @@ -856,6 +862,9 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream) aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16); fifoctrl_a |= DAC33_WIDTH; break; + case SNDRV_PCM_FORMAT_S32_LE: + aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24); + break; default: dev_err(codec->dev, "unsupported format %d\n", substream->runtime->format); @@ -990,7 +999,10 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream) dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, dac33->burst_bclkdiv); else - dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32); + if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE) + dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32); + else + dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16); switch (dac33->fifo_mode) { case DAC33_FIFO_MODE1: @@ -1438,7 +1450,7 @@ static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = { #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000) -#define DAC33_FORMATS SNDRV_PCM_FMTBIT_S16_LE +#define DAC33_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE) static struct snd_soc_dai_ops dac33_dai_ops = { .startup = dac33_startup, -- 2.20.1