ASoC: simple-card-utils.c: enable multi Component support

If CPU/Codec driver keeps its DAI node, we can directly identify actual
DAI by using snd_soc_get_dai_via_args().
This means we can use multi Component.

This patch enables multi Component support on Audio Graph Card/Card2.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87a5w4o949.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/simple_card_utils.h

@@ -192,9 +192,8 @@ int asoc_simple_remove(struct platform_device *pdev);
 
 int asoc_graph_card_probe(struct snd_soc_card *card);
 int asoc_graph_is_ports0(struct device_node *port);
-int asoc_graph_parse_dai(struct device_node *ep,
-			 struct snd_soc_dai_link_component *dlc,
-			 int *is_single_link);
+int asoc_graph_parse_dai(struct device *dev, struct device_node *ep,
+			 struct snd_soc_dai_link_component *dlc, int *is_single_link);
 
 #ifdef DEBUG
 static inline void asoc_simple_debug_dai(struct asoc_simple_priv *priv,

sound/soc/generic/audio-graph-card.c

@@ -126,7 +126,7 @@ static int graph_parse_node(struct asoc_simple_priv *priv,
 
 	graph_parse_mclk_fs(top, ep, dai_props);
 
-	ret = asoc_graph_parse_dai(ep, dlc, cpu);
+	ret = asoc_graph_parse_dai(dev, ep, dlc, cpu);
 	if (ret < 0)
 		return ret;
 

sound/soc/generic/audio-graph-card2.c

@@ -407,7 +407,7 @@ static int __graph_parse_node(struct asoc_simple_priv *priv,
 
 	graph_parse_mclk_fs(ep, dai_props);
 
-	ret = asoc_graph_parse_dai(ep, dlc, &is_single_links);
+	ret = asoc_graph_parse_dai(dev, ep, dlc, &is_single_links);
 	if (ret < 0)
 		return ret;
 

sound/soc/generic/simple-card-utils.c

@@ -1066,19 +1066,33 @@ static int graph_get_dai_id(struct device_node *ep)
 	return id;
 }
 
-int asoc_graph_parse_dai(struct device_node *ep,
-			 struct snd_soc_dai_link_component *dlc,
-			 int *is_single_link)
+int asoc_graph_parse_dai(struct device *dev, struct device_node *ep,
+			 struct snd_soc_dai_link_component *dlc, int *is_single_link)
 {
 	struct device_node *node;
 	struct of_phandle_args args = {};
+	struct snd_soc_dai *dai;
 	int ret;
 
 	if (!ep)
 		return 0;
 
 	node = of_graph_get_port_parent(ep);
 
+	/*
+	 * Try to find from DAI node
+	 */
+	args.np = ep;
+	dai = snd_soc_get_dai_via_args(&args);
+	if (dai) {
+		dlc->dai_name = snd_soc_dai_name_get(dai);
+		dlc->dai_args = snd_soc_copy_dai_args(dev, &args);
+		if (!dlc->dai_args)
+			return -ENOMEM;
+
+		goto parse_dai_end;
+	}
+
 	/* Get dai->name */
 	args.np		= node;
 	args.args[0]	= graph_get_dai_id(ep);
@@ -1109,6 +1123,7 @@ int asoc_graph_parse_dai(struct device_node *ep,
 		return ret;
 	}
 
+parse_dai_end:
 	if (is_single_link)
 		*is_single_link = of_graph_get_endpoint_count(node) == 1;