return id;
}
+static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
+{
+ struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc);
+
+ if (dai && (dai->component->driver->pcm_construct ||
+ dai->driver->pcm_new))
+ return true;
+
+ return false;
+}
+
static int asoc_simple_parse_dai(struct device_node *ep,
struct snd_soc_dai_link_component *dlc,
int *is_single_link)
int dup_codec)
{
struct device *dev = simple_priv_to_dev(priv);
+ struct snd_soc_card *card = simple_priv_to_card(priv);
struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
struct device_node *top = dev->of_node;
if (ret < 0)
goto out_put_node;
+ /*
+ * In BE<->BE connections it is not required to create
+ * PCM devices at CPU end of the dai link and thus 'no_pcm'
+ * flag needs to be set. It is useful when there are many
+ * BE components and some of these have to be connected to
+ * form a valid audio path.
+ *
+ * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
+ * there are 'n' BE components in the path.
+ */
+ if (card->component_chaining && !soc_component_is_pcm(cpus))
+ dai_link->no_pcm = 1;
+
/* card->num_links includes Codec */
asoc_simple_canonicalize_cpu(dai_link, is_single_links);
} else {