[alsa-devel] [PATCH 11/13] ASoC: Define API to find a dai link by id

[mengdong.lin at linux.intel.com]

From: Mengdong Lin <mengdong.lin at linux.intel.com>

Topology can use this to check if a BE link already exists, and create
a new link if not found.

Signed-off-by: Mengdong Lin <mengdong.lin at linux.intel.com>

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 4f1c784..d52601a 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1671,6 +1671,8 @@ int snd_soc_add_dai_link(struct snd_soc_card *card,
 				struct snd_soc_dai_link *dai_link);
 void snd_soc_remove_dai_link(struct snd_soc_card *card,
 			     struct snd_soc_dai_link *dai_link);
+struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
+					       int id);
 
 int snd_soc_register_dai(struct snd_soc_component *component,
 	struct snd_soc_dai_driver *dai_drv);
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index f6f5027..6b1d198 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -972,6 +972,22 @@ struct snd_soc_dai *snd_soc_find_dai(
 }
 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
 
+struct snd_soc_dai_link *snd_soc_find_dai_link(
+	struct snd_soc_card *card, int id)
+{
+	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)
+			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)
 {
-- 
2.5.0