ASoC: Define add/remove_dai_link ops for a soc card
A machine driver can register the two ops.
When a DAI link is added or removed by a component's topology, the
ASoC core can call the ops to notify the machine driver for extra
intialization or destruction.
E.g. topology can create FE DAI links from a cpu DAI component, and
the machine driver may define an add_dai_link ops to set machine-specific
.init ops for the DAI link.
Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 410cb0b..af347bc 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1104,6 +1104,11 @@
struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level);
+ int (*add_dai_link)(struct snd_soc_card *,
+ struct snd_soc_dai_link *link);
+ void (*remove_dai_link)(struct snd_soc_card *,
+ struct snd_soc_dai_link *link);
+
long pmdown_time;
/* CPU <--> Codec DAI links */
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index bf4bccf..094856f 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1260,6 +1260,12 @@
}
lockdep_assert_held(&client_mutex);
+ /* Notify the machine driver for extra initialization
+ * on the link created by topology.
+ */
+ if (dai_link->dobj.type && card->add_dai_link)
+ card->add_dai_link(card, dai_link);
+
list_add_tail(&dai_link->list, &card->dai_link_list);
card->num_dai_links++;
@@ -1290,6 +1296,12 @@
}
lockdep_assert_held(&client_mutex);
+ /* Notify the machine driver for extra destruction
+ * on the link created by topology.
+ */
+ if (dai_link->dobj.type && card->remove_dai_link)
+ card->remove_dai_link(card, dai_link);
+
list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
if (link == dai_link) {
list_del(&link->list);
