diff --git a/include/sound/soc.h b/include/sound/soc.h
index aad3f14966f13f369a3a84d6549c557829c7589e..87dbe39797ca073024d69420d61e5acc7b6f7ca0 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -886,6 +886,18 @@ struct snd_soc_component {
 #endif
 };
 
+struct snd_soc_rtdcom_list {
+	struct snd_soc_component *component;
+	struct list_head list; /* rtd::component_list */
+};
+struct snd_soc_component*
+snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
+		       const char *driver_name);
+#define for_each_rtdcom(rtd, rtdcom) \
+	list_for_each_entry(rtdcom, &(rtd)->component_list, list)
+#define for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2) \
+	list_for_each_entry_safe(rtdcom1, rtdcom2, &(rtd)->component_list, list)
+
 /* SoC Audio Codec device */
 struct snd_soc_codec {
 	struct device *dev;
@@ -1240,6 +1252,7 @@ struct snd_soc_pcm_runtime {
 
 	unsigned int num; /* 0-based and monotonic increasing */
 	struct list_head list; /* rtd list of the soc card */
+	struct list_head component_list; /* list of connected components */
 
 	/* bit field */
 	unsigned int dev_registered:1;
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 07d708498500cda946f26282275bbb0972dab52e..c2462e0f0f0df8e3e133b3f522c6cffc8efd4835 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -551,6 +551,54 @@ static inline void snd_soc_debugfs_exit(void)
 
 #endif
 
+static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
+			      struct snd_soc_component *component)
+{
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_rtdcom_list *new_rtdcom;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		/* already connected */
+		if (rtdcom->component == component)
+			return 0;
+	}
+
+	new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
+	if (!new_rtdcom)
+		return -ENOMEM;
+
+	new_rtdcom->component = component;
+	INIT_LIST_HEAD(&new_rtdcom->list);
+
+	list_add_tail(&new_rtdcom->list, &rtd->component_list);
+
+	return 0;
+}
+
+static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
+
+	for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
+		kfree(rtdcom1);
+
+	INIT_LIST_HEAD(&rtd->component_list);
+}
+
+struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
+						const char *driver_name)
+{
+	struct snd_soc_rtdcom_list *rtdcom;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		if ((rtdcom->component->driver->name == driver_name) ||
+		    strcmp(rtdcom->component->driver->name, driver_name) == 0)
+			return rtdcom->component;
+	}
+
+	return NULL;
+}
+
 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
 		const char *dai_link, int stream)
 {
@@ -575,6 +623,7 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
 	if (!rtd)
 		return NULL;
 
+	INIT_LIST_HEAD(&rtd->component_list);
 	rtd->card = card;
 	rtd->dai_link = dai_link;
 	rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
@@ -592,6 +641,7 @@ static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
 {
 	if (rtd && rtd->codec_dais)
 		kfree(rtd->codec_dais);
+	snd_soc_rtdcom_del_all(rtd);
 	kfree(rtd);
 }