ASoC: simple-card-utils: support snd_soc_get_dai_id()

ALSA SoC needs to know connected DAI ID for detecting.
It is not a big problem if device/driver was only for sound,
but getting DAI ID will be difficult if device includes both
Video/Sound, like HDMI.
To solve this issue, this patch adds new snd_soc_get_dai_id() and
its related .of_xlate_dai_id callback on component driver.
In below case, we can handle Sound port (= port@2) as ID = 0
if .of_xlate_dai_id has its support.

	hdmi {
		port@0 { /* VIDEO */ };
		port@1 { /* VIDEO */ };
		port@2 { /* SOUND */ };
	};

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 5a3d51e45938..fe726e83d0bd 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -177,9 +177,18 @@ static int asoc_simple_card_get_dai_id(struct device_node *ep)
         struct device_node *node;
         struct device_node *endpoint;
         int i, id;
+        int ret;
+
+        ret = snd_soc_get_dai_id(ep);
+        if (ret != -ENOTSUPP)
+                return ret;
 
         node = of_graph_get_port_parent(ep);
 
+        /*
+         * Non HDMI sound case, counting port/endpoint on its DT
+         * is enough. Let's count it.
+         */
         i = 0;
         id = -1;
         for_each_endpoint_of_node(node, endpoint) {