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authorBarry Song <21cnbao@gmail.com>2009-09-12 01:16:29 +0800
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-09-13 12:37:53 +0100
commit472df3cbae8da6a949f1392a11958b8d21383735 (patch)
tree0e8c33fdf2de2cd970c29e7baf52a70fde005a59 /sound/soc/soc-core.c
parent2312fd8f6b252b7d3c1d74b20c75b7bff98bab65 (diff)
downloadop-kernel-dev-472df3cbae8da6a949f1392a11958b8d21383735.zip
op-kernel-dev-472df3cbae8da6a949f1392a11958b8d21383735.tar.gz
ASoC: Provide API for reordering channels
The patch adds an interface to set the relationship between audio channel number and slot number. The interface should be really useful because audio channel n doesn't always use slot n in all platforms. And for some devices, the relationship even can change with sound mode switch in 2.1,3.1,4.1,5.1,6.1,7.1 etc. Signed-off-by: Barry Song <21cnbao@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/soc-core.c')
-rw-r--r--sound/soc/soc-core.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 05fdc80..f5b356f 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2253,6 +2253,30 @@ int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
/**
+ * snd_soc_dai_set_channel_map - configure DAI audio channel map
+ * @dai: DAI
+ * @tx_num: how many TX channels
+ * @tx_slot: pointer to an array which imply the TX slot number channel
+ * 0~num-1 uses
+ * @rx_num: how many RX channels
+ * @rx_slot: pointer to an array which imply the RX slot number channel
+ * 0~num-1 uses
+ *
+ * configure the relationship between channel number and TDM slot number.
+ */
+int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
+ unsigned int tx_num, unsigned int *tx_slot,
+ unsigned int rx_num, unsigned int *rx_slot)
+{
+ if (dai->ops && dai->ops->set_channel_map)
+ return dai->ops->set_channel_map(dai, tx_num, tx_slot,
+ rx_num, rx_slot);
+ else
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
+
+/**
* snd_soc_dai_set_tristate - configure DAI system or master clock.
* @dai: DAI
* @tristate: tristate enable
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