[alsa-devel] [PATCH][RFC] ASoC: simple-card-utils: fixup asoc_simple_card_get_dai_id() ID method

[Kuninori Morimoto]

commit b6f3fc005a2c8 ("ASoC: simple-card-utils: fixup
asoc_simple_card_get_dai_id() counting") fixuped getting DAI ID method.
It will get DAI ID from OF graph "port", but, we want to consider about
"endpoint", too.
And, we also want to keep compatibility.

This patch fixup it as

	if (driver has specified DAI ID)
		use it as DAI ID
	else if (OF graph endpoint has reg)
		use it as DAI ID
	else if (OF graph port has reg)
		use it as DAI ID
	else
		use endpoint count as DAI ID

Fixes: commit b6f3fc005a2c8 ("ASoC: simple-card-utils: fixup asoc_simple_card_get_dai_id() counting")
Reported-by: Tony Lindgren <tony at atomide.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
> Tony

Can you test this patch ?
It can keep compatibility, I think.

> Mark

I added [RFC] on this patch.
If this patch was OK by Tony's test,
I will re-post it as v3 patch-set.

 sound/soc/generic/simple-card-utils.c | 32 ++++++++++++++++++++++++++++----
 1 file changed, 28 insertions(+), 4 deletions(-)

diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 17d8aee..b807a47 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -269,22 +269,46 @@ EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);
 
 static int asoc_simple_card_get_dai_id(struct device_node *ep)
 {
+	struct device_node *node;
+	struct device_node *endpoint;
 	struct of_endpoint info;
+	int i, id;
 	int ret;
 
+	/* use driver specified DAI ID if exist */
 	ret = snd_soc_get_dai_id(ep);
 	if (ret != -ENOTSUPP)
 		return ret;
 
+	/* use endpoint/port reg if exist */
+	ret = of_graph_parse_endpoint(ep, &info);
+	if (ret == 0) {
+		if (info.id)
+			return info.id;
+		if (info.port)
+			return info.port;
+	}
+
+	node = of_graph_get_port_parent(ep);
+
 	/*
 	 * Non HDMI sound case, counting port/endpoint on its DT
 	 * is enough. Let's count it.
 	 */
-	ret = of_graph_parse_endpoint(ep, &info);
-	if (ret)
-		return -ENXIO;
+	i = 0;
+	id = -1;
+	for_each_endpoint_of_node(node, endpoint) {
+		if (endpoint == ep)
+			id = i;
+		i++;
+	}
+
+	of_node_put(node);
+
+	if (id < 0)
+		return -ENODEV;
 
-	return info.port;
+	return id;
 }
 
 int asoc_simple_card_parse_graph_dai(struct device_node *ep,
-- 
2.7.4