提交 472df3cb 编写于 作者: B Barry Song 提交者: Mark Brown

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: NBarry Song <21cnbao@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
上级 2312fd8f
......@@ -114,6 +114,10 @@ int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
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);
int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
/* Digital Audio Interface mute */
......@@ -148,6 +152,9 @@ struct snd_soc_dai_ops {
int (*set_tdm_slot)(struct snd_soc_dai *dai,
unsigned int tx_mask, unsigned int rx_mask,
int slots, int slot_width);
int (*set_channel_map)(struct snd_soc_dai *dai,
unsigned int tx_num, unsigned int *tx_slot,
unsigned int rx_num, unsigned int *rx_slot);
int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
/*
......
......@@ -2252,6 +2252,30 @@ 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
......
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