From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
ALSA SoC needs to know connected DAI ID for probing. On OF-graph case, basically we can check DT port location.
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- v2 -> v3
- no change
include/sound/soc.h | 1 + sound/soc/soc-core.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+)
diff --git a/include/sound/soc.h b/include/sound/soc.h index cdfb55f..ab4639e 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1664,6 +1664,7 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np, const char *prefix, struct device_node **bitclkmaster, struct device_node **framemaster); +int snd_soc_get_dai_id(struct device_node *ep); int snd_soc_get_dai_name(struct of_phandle_args *args, const char **dai_name); int snd_soc_of_get_dai_name(struct device_node *of_node, diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index a110d39..67901a3 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> @@ -4035,6 +4036,28 @@ 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 device_node *node; + struct device_node *endpoint; + int i, id; + + node = of_graph_get_port_parent(ep); + + i = 0; + id = -1; + for_each_endpoint_of_node(node, endpoint) { + if (endpoint == ep) + id = i; + i++; + } + if (id < 0) + return -ENODEV; + + return id; +} +EXPORT_SYMBOL_GPL(snd_soc_get_dai_id); + int snd_soc_get_dai_name(struct of_phandle_args *args, const char **dai_name) {