diff options
Diffstat (limited to 'sound/soc/soc-core.c')
| -rw-r--r-- | sound/soc/soc-core.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index aae099c0e502..b0fb17082691 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -34,6 +34,7 @@ #include <linux/ctype.h> #include <linux/slab.h> #include <linux/of.h> +#include <linux/of_graph.h> #include <linux/dmi.h> #include <sound/core.h> #include <sound/jack.h> @@ -4044,6 +4045,42 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np, } EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt); +int snd_soc_get_dai_id(struct device_node *ep) +{ + struct snd_soc_component *pos; + struct device_node *node; + int ret; + + node = of_graph_get_port_parent(ep); + + /* + * For example HDMI case, HDMI has video/sound port, + * but ALSA SoC needs sound port number only. + * Thus counting HDMI DT port/endpoint doesn't work. + * Then, it should have .of_xlate_dai_id + */ + ret = -ENOTSUPP; + mutex_lock(&client_mutex); + list_for_each_entry(pos, &component_list, list) { + struct device_node *component_of_node = pos->dev->of_node; + + if (!component_of_node && pos->dev->parent) + component_of_node = pos->dev->parent->of_node; + + if (component_of_node != node) + continue; + + if (pos->driver->of_xlate_dai_id) + ret = pos->driver->of_xlate_dai_id(pos, ep); + + break; + } + mutex_unlock(&client_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_get_dai_id); + int snd_soc_get_dai_name(struct of_phandle_args *args, const char **dai_name) { |