From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
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@xxxxxxxxxxx>
---
sound/soc/generic/simple-card-utils.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 5a3d51e..fe726e8 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) {
--
1.9.1
