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authorPeter Ujfalusi <peter.ujfalusi@nokia.com>2010-12-22 10:45:18 +0200
committerLiam Girdwood <lrg@slimlogic.co.uk>2010-12-23 14:38:34 +0000
commit0d99d2b036974ed1160f9d10457b6054646fb7d6 (patch)
tree9f762e6a939d183f02785c351d9bd9d864fa01a5 /sound/soc
parent549675ed658761b9a84cb579795c9ec1da227fea (diff)
downloadop-kernel-dev-0d99d2b036974ed1160f9d10457b6054646fb7d6.zip
op-kernel-dev-0d99d2b036974ed1160f9d10457b6054646fb7d6.tar.gz
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 <peter.ujfalusi@nokia.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/codecs/tlv320dac33.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index 05a4e9f..13d521c 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,
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