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 --- include/sound/soc.h | 5 +++++ sound/soc/soc-core.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/include/sound/soc.h b/include/sound/soc.h index a7f62d5..c573a87 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -349,6 +349,11 @@ 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); diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index a25ba6f..511e70b 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -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)