diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/soc-core.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index c0bbcd903261..a7a1ca40bcf5 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -972,6 +972,48 @@ struct snd_soc_dai *snd_soc_find_dai( } EXPORT_SYMBOL_GPL(snd_soc_find_dai); + +/** + * snd_soc_find_dai_link - Find a DAI link + * + * @card: soc card + * @id: DAI link ID to match + * @name: DAI link name to match, optional + * @stream name: DAI link stream name to match, optional + * + * This function will search all existing DAI links of the soc card to + * find the link of the same ID. Since DAI links may not have their + * unique ID, so name and stream name should also match if being + * specified. + * + * Return: pointer of DAI link, or NULL if not found. + */ +struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card, + int id, const char *name, + const char *stream_name) +{ + struct snd_soc_dai_link *link, *_link; + + lockdep_assert_held(&client_mutex); + + list_for_each_entry_safe(link, _link, &card->dai_link_list, list) { + if (link->id != id) + continue; + + if (name && (!link->name || strcmp(name, link->name))) + continue; + + if (stream_name && (!link->stream_name + || strcmp(stream_name, link->stream_name))) + continue; + + return link; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_find_dai_link); + static bool soc_is_dai_link_bound(struct snd_soc_card *card, struct snd_soc_dai_link *dai_link) { |