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>
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 201a4d0..4d88698 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -465,6 +465,35 @@
}
#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)