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Subject[PATCH] ASoC: Atmel: ClassD: supports mono audio
Date
Modify the code to support mono audio.

Signed-off-by: Songjun Wu <songjun.wu@atmel.com>
---

sound/soc/atmel/atmel-classd.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/sound/soc/atmel/atmel-classd.c b/sound/soc/atmel/atmel-classd.c
index 2f5190b..10ac47d 100644
--- a/sound/soc/atmel/atmel-classd.c
+++ b/sound/soc/atmel/atmel-classd.c
@@ -106,7 +106,7 @@ static const struct snd_pcm_hardware atmel_classd_hw = {
.rates = ATMEL_CLASSD_RATES,
.rate_min = 8000,
.rate_max = 96000,
- .channels_min = 2,
+ .channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 64 * 1024,
.period_bytes_min = 256,
@@ -145,7 +145,7 @@ static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = {

static struct snd_soc_dai_driver atmel_classd_cpu_dai = {
.playback = {
- .channels_min = 2,
+ .channels_min = 1,
.channels_max = 2,
.rates = ATMEL_CLASSD_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
@@ -171,9 +171,13 @@ atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream,
return -EINVAL;
}

+ if (params_channels(params) == 1)
+ slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ else
+ slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+
slave_config->direction = DMA_MEM_TO_DEV;
slave_config->dst_addr = dd->phy_base + CLASSD_THR;
- slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
slave_config->dst_maxburst = 1;
slave_config->src_maxburst = 1;
slave_config->device_fc = false;
@@ -486,7 +490,7 @@ static struct snd_soc_dai_driver atmel_classd_codec_dai = {
.name = ATMEL_CLASSD_CODEC_DAI_NAME,
.playback = {
.stream_name = "Playback",
- .channels_min = 2,
+ .channels_min = 1,
.channels_max = 2,
.rates = ATMEL_CLASSD_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
--
1.7.9.5


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