diff --git a/include/sound/core.h b/include/sound/core.h
index 36a5934cf4b1..3b8274e74ffb 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -134,6 +134,9 @@ struct snd_card {
 	const struct attribute_group *dev_groups[4]; /* assigned sysfs attr */
 	bool registered;		/* card_dev is registered? */
 	wait_queue_head_t remove_sleep;
+	int offline;			/* if this sound card is offline */
+	unsigned long offline_change;
+	wait_queue_head_t offline_poll_wait;
 
 #ifdef CONFIG_PM
 	unsigned int power_state;	/* power state */
@@ -253,6 +256,7 @@ int snd_component_add(struct snd_card *card, const char *component);
 int snd_card_file_add(struct snd_card *card, struct file *file);
 int snd_card_file_remove(struct snd_card *card, struct file *file);
 #define snd_card_unref(card)	put_device(&(card)->card_dev)
+void snd_card_change_online_state(struct snd_card *card, int online);
 
 #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr))
 
diff --git a/include/sound/soc.h b/include/sound/soc.h
index fb069f1d7666..981ce5bee896 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -556,6 +556,8 @@ static inline void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
 }
 #endif
 
+void snd_soc_card_change_online_state(struct snd_soc_card *soc_card,
+				      int online);
 struct snd_ac97 *snd_soc_alloc_ac97_component(struct snd_soc_component *component);
 struct snd_ac97 *snd_soc_new_ac97_component(struct snd_soc_component *component,
 	unsigned int id, unsigned int id_mask);
diff --git a/sound/core/init.c b/sound/core/init.c
index 16b7cc7aa66b..913c55e2fc2b 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -257,6 +257,7 @@ int snd_card_new(struct device *parent, int idx, const char *xid,
 #endif
 	init_waitqueue_head(&card->remove_sleep);
 
+	init_waitqueue_head(&card->offline_poll_wait);
 	device_initialize(&card->card_dev);
 	card->card_dev.parent = parent;
 	card->card_dev.class = sound_class;
@@ -1000,6 +1001,25 @@ int snd_card_file_remove(struct snd_card *card, struct file *file)
 }
 EXPORT_SYMBOL(snd_card_file_remove);
 
+/**
+ * snd_card_change_online_state - mark card's online/offline state
+ * @card: Card to mark
+ * @online: whether online of offline
+ *
+ * Mutes the DAI DAC.
+ */
+void snd_card_change_online_state(struct snd_card *card, int online)
+{
+	snd_printd("snd card %s state change %d -> %d\n",
+		   card->shortname, !card->offline, online);
+	card->offline = !online;
+	/* make sure offline is updated prior to wake up */
+	wmb();
+	xchg(&card->offline_change, 1);
+	wake_up_interruptible(&card->offline_poll_wait);
+}
+EXPORT_SYMBOL_GPL(snd_card_change_online_state);
+
 #ifdef CONFIG_PM
 /**
  *  snd_power_wait - wait until the power-state is changed.
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index afdfc0ec0267..8008dc7098c4 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3274,6 +3274,17 @@ struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
 
+/**
+ * snd_soc_card_change_online_state - Mark if soc card is online/offline
+ *
+ * @soc_card : soc_card to mark
+ */
+void snd_soc_card_change_online_state(struct snd_soc_card *soc_card, int online)
+{
+	snd_card_change_online_state(soc_card->snd_card, online);
+}
+EXPORT_SYMBOL_GPL(snd_soc_card_change_online_state);
+
 /* Retrieve a card's name from device tree */
 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
 			       const char *propname)