From: Matthias Reichl <hias@xxxxxxxxx>
This adds 24 bit support to the I2S driver of the BCM2835
Code ported from bcm2708-i2s driver in Raspberry Pi tree.
Signed-off-by: Florian Meier <florian.meier@xxxxxxxx>
Signed-off-by: Matthias Reichl <hias@xxxxxxxxx>
Signed-off-by: Martin Sperl <kernel@xxxxxxxxxxxxxxxx>
---
sound/soc/bcm/bcm2835-i2s.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/sound/soc/bcm/bcm2835-i2s.c b/sound/soc/bcm/bcm2835-i2s.c
index 1c1f221..d2663e7 100644
--- a/sound/soc/bcm/bcm2835-i2s.c
+++ b/sound/soc/bcm/bcm2835-i2s.c
@@ -259,6 +259,9 @@ static int bcm2835_i2s_hw_params(struct snd_pcm_substream *substream,
case SNDRV_PCM_FORMAT_S16_LE:
data_length = 16;
break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ data_length = 24;
+ break;
case SNDRV_PCM_FORMAT_S32_LE:
data_length = 32;
break;
@@ -279,7 +282,7 @@ static int bcm2835_i2s_hw_params(struct snd_pcm_substream *substream,
/* Setup the frame format */
format = BCM2835_I2S_CHEN;
- if (data_length > 24)
+ if (data_length >= 24)
format |= BCM2835_I2S_CHWEX;
format |= BCM2835_I2S_CHWID((data_length-8)&0xf);
@@ -570,6 +573,7 @@ static struct snd_soc_dai_driver bcm2835_i2s_dai = {
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE
+ | SNDRV_PCM_FMTBIT_S24_LE
| SNDRV_PCM_FMTBIT_S32_LE
},
.capture = {
@@ -577,6 +581,7 @@ static struct snd_soc_dai_driver bcm2835_i2s_dai = {
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE
+ | SNDRV_PCM_FMTBIT_S24_LE
| SNDRV_PCM_FMTBIT_S32_LE
},
.ops = &bcm2835_i2s_dai_ops,
--
2.1.4
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