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ASoC: dpcm: Add API for DAI link substream and runtime lookup 

Some component drivers will need to be able to look up their
DAI link substream and RTD data. Provide a mechanism for this.

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Liam Girdwood 2012-04-25 12:12:53 +01:00 committed by Mark Brown
parent 618dae11f8
commit 47c88ffff7
2 changed files with 34 additions and 0 deletions
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5
include/sound/soc.h
View File

@ -362,6 +362,11 @@ int snd_soc_platform_write(struct snd_soc_platform *platform,
unsigned int reg, unsigned int val);
int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
const char *dai_link, int stream);
struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
const char *dai_link);
/* Utility functions to get clock rates from various things */
int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);
int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params);

29
sound/soc/soc-core.c
View File

@ -465,6 +465,35 @@ static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
}
#endif
struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
const char *dai_link, int stream)
{
int i;
for (i = 0; i < card->num_links; i++) {
if (card->rtd[i].dai_link->no_pcm &&
!strcmp(card->rtd[i].dai_link->name, dai_link))
return card->rtd[i].pcm->streams[stream].substream;
}
dev_dbg(card->dev, "failed to find dai link %s\n", dai_link);
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
const char *dai_link)
{
int i;
for (i = 0; i < card->num_links; i++) {
if (!strcmp(card->rtd[i].dai_link->name, dai_link))
return &card->rtd[i];
}
dev_dbg(card->dev, "failed to find rtd %s\n", dai_link);
return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
#ifdef CONFIG_SND_SOC_AC97_BUS
/* unregister ac97 codec */
static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)