ASoC: simple-scu-card: support snd_soc_dai_link_component style for codec

Current ASoC is supporting snd_soc_dai_link_component for binding,
it is more useful than current legacy style.
Currently only codec is supporting it as multicodec (= codecs).
CPU will support multi style in the future.
We want to have it on Platform too in the future.

If all Codec/CPU/Platform are replaced into snd_soc_dai_link_component
style, we can remove legacy complex style.
This patch supports snd_soc_dai_link_component style
for simple-scu-card for codec.

[current]
struct snd_soc_dai_link {
	...
	*cpu_name;
	*cpu_of_node;
	*cpu_dai_name;

	*codec_name;
	*codec_of_node;
	*codec_dai_name;
	*codecs;
	num_codecs;

	*platform_name;
	*platform_of_node;
	...
}

[in the future]
struct snd_soc_dai_link {
	...
	*cpus
	num_cpus;

	*codecs;
	num_codecs;

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

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

@@ -24,6 +24,7 @@ struct simple_card_data {
 	struct snd_soc_codec_conf codec_conf;
 	struct simple_dai_props {
 		struct asoc_simple_dai dai;
+		struct snd_soc_dai_link_component codecs;
 	} *dai_props;
 	struct snd_soc_dai_link *dai_link;
 	struct asoc_simple_card_data adata;
@@ -103,11 +104,13 @@ static int asoc_simple_card_dai_link_of(struct device_node *np,
 
 	if (is_fe) {
 		int is_single_links = 0;
+		struct snd_soc_dai_link_component *codecs;
 
 		/* BE is dummy */
-		dai_link->codec_of_node		= NULL;
-		dai_link->codec_dai_name	= "snd-soc-dummy-dai";
-		dai_link->codec_name		= "snd-soc-dummy";
+		codecs			= dai_link->codecs;
+		codecs->of_node		= NULL;
+		codecs->dai_name	= "snd-soc-dummy-dai";
+		codecs->name		= "snd-soc-dummy";
 
 		/* FE settings */
 		dai_link->dynamic		= 1;
@@ -149,13 +152,13 @@ static int asoc_simple_card_dai_link_of(struct device_node *np,
 
 		ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 							"be.%s",
-							dai_link->codec_dai_name);
+							dai_link->codecs->dai_name);
 		if (ret < 0)
 			return ret;
 
 		snd_soc_of_parse_audio_prefix(card,
 					      &priv->codec_conf,
-					      dai_link->codec_of_node,
+					      dai_link->codecs->of_node,
 					      PREFIX "prefix");
 	}
 
@@ -236,7 +239,7 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	struct snd_soc_card *card;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
-	int num, ret;
+	int num, ret, i;
 
 	/* Allocate the private data */
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -250,6 +253,17 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	if (!dai_props || !dai_link)
 		return -ENOMEM;
 
+	/*
+	 * Use snd_soc_dai_link_component instead of legacy style
+	 * It is codec only. but cpu/platform will be supported in the future.
+	 * see
+	 *	soc-core.c :: snd_soc_init_multicodec()
+	 */
+	for (i = 0; i < num; i++) {
+		dai_link[i].codecs	= &dai_props[i].codecs;
+		dai_link[i].num_codecs	= 1;
+	}
+
 	priv->dai_props				= dai_props;
 	priv->dai_link				= dai_link;