ASoC: simple-card: cleanup DAI link loop method - step2

Current simple-card is parsing DAI link for both "normal sound" and
"DPCM sound". On this driver, it needs to count and parse
DAIs/Links/Codec Conf from each links.
Then, counting/parsing link loop are very similar, but using different
implementation. Because of this background, the link loop code is very
mysterious. Mystery code will be trouble in the future.

This patch cleanups the code by using asoc_simple_card_for_each_link()
which judges normal link / DPCM link.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/simple-card.c

@@ -431,6 +431,74 @@ static int asoc_simple_card_dai_link_of(struct simple_card_data *priv,
 	return ret;
 }
 
+static int asoc_simple_card_for_each_link(struct simple_card_data *priv,
+			struct link_info *li,
+			int (*func_noml)(struct simple_card_data *priv,
+					 struct device_node *np,
+					 struct device_node *codec,
+					 struct link_info *li, bool is_top),
+			int (*func_dpcm)(struct simple_card_data *priv,
+					 struct device_node *np,
+					 struct device_node *codec,
+					 struct link_info *li, bool is_top))
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct device_node *top = dev->of_node;
+	struct device_node *node;
+	bool is_top = 0;
+
+	/* Check if it has dai-link */
+	node = of_get_child_by_name(top, PREFIX "dai-link");
+	if (!node) {
+		node = top;
+		is_top = 1;
+	}
+
+	/* loop for all dai-link */
+	do {
+		struct asoc_simple_card_data adata;
+		struct device_node *codec;
+		struct device_node *np;
+		int num = of_get_child_count(node);
+		int ret;
+
+		/* get codec */
+		codec = of_get_child_by_name(node, is_top ?
+					     PREFIX "codec" : "codec");
+		if (!codec)
+			return -ENODEV;
+
+		of_node_put(codec);
+
+		/* get convert-xxx property */
+		memset(&adata, 0, sizeof(adata));
+		for_each_child_of_node(node, np)
+			asoc_simple_card_get_conversion(dev, np, &adata);
+
+		/* loop for all CPU/Codec node */
+		for_each_child_of_node(node, np) {
+			/*
+			 * It is DPCM
+			 * if it has many CPUs,
+			 * or has convert-xxx property
+			 */
+			if (num > 2 ||
+			    adata.convert_rate || adata.convert_channels)
+				ret = func_dpcm(priv, np, codec, li, is_top);
+			/* else normal sound */
+			else
+				ret = func_noml(priv, np, codec, li, is_top);
+
+			if (ret < 0)
+				return ret;
+		}
+
+		node = of_get_next_child(top, node);
+	} while (!is_top && node);
+
+	return 0;
+}
+
 static int asoc_simple_card_parse_aux_devs(struct device_node *node,
 					   struct simple_card_data *priv)
 {
@@ -467,9 +535,8 @@ static int asoc_simple_card_parse_of(struct simple_card_data *priv)
 	struct device *dev = simple_priv_to_dev(priv);
 	struct device_node *top = dev->of_node;
 	struct snd_soc_card *card = simple_priv_to_card(priv);
-	struct device_node *node;
 	struct link_info li;
-	int ret, loop;
+	int ret;
 
 	if (!top)
 		return -EINVAL;
@@ -484,35 +551,7 @@ static int asoc_simple_card_parse_of(struct simple_card_data *priv)
 
 	/* Single/Muti DAI link(s) & New style of DT node */
 	memset(&li, 0, sizeof(li));
-
-	/* FIXME */
-	li.cpu = 1;
-parse_loop:
-	loop		= 1;
-	node = of_get_child_by_name(top, PREFIX "dai-link");
-	if (!node) {
-		node = dev->of_node;
-		loop = 0;
-	}
-
-	do  {
-		struct asoc_simple_card_data adata;
-		struct device_node *codec;
-		struct device_node *np;
-		int num = of_get_child_count(node);
-		int ret;
-
-		codec = of_get_child_by_name(node, !loop ?
-					     PREFIX "codec" : "codec");
-		if (!codec)
-			return -ENODEV;
-
-		of_node_put(codec);
-
-		memset(&adata, 0, sizeof(adata));
-		for_each_child_of_node(node, np)
-			asoc_simple_card_get_conversion(dev, np, &adata);
-
+	for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
 		/*
 		 * Detect all CPU first, and Detect all Codec 2nd.
 		 *
@@ -525,29 +564,12 @@ static int asoc_simple_card_parse_of(struct simple_card_data *priv)
 		 * To avoid random sub-device numbering,
 		 * detect "dummy-Codec" in last;
 		 */
-
-		/* loop for all CPU/Codec node */
-		for_each_child_of_node(node, np) {
-			if (num > 2 ||
-			    adata.convert_rate || adata.convert_channels) {
-				ret = asoc_simple_card_dai_link_of_dpcm(
-					priv, np, codec, &li, !loop);
-				if (ret < 0)
-					return ret;
-			} else {
-				ret = asoc_simple_card_dai_link_of(
-					priv, np, codec, &li, !loop);
+		ret = asoc_simple_card_for_each_link(priv, &li,
+						     asoc_simple_card_dai_link_of,
+						     asoc_simple_card_dai_link_of_dpcm);
 		if (ret < 0)
 			return ret;
 	}
-		}
-		node = of_get_next_child(top, node);
-	} while (loop && node);
-
-	/* FIXME */
-	li.cpu--;
-	if (li.cpu >= 0)
-		goto parse_loop;
 
 	ret = asoc_simple_card_parse_card_name(card, PREFIX);
 	if (ret < 0)
@@ -588,12 +610,6 @@ static void asoc_simple_card_get_dais_count(struct simple_card_data *priv,
 {
 	struct device *dev = simple_priv_to_dev(priv);
 	struct device_node *top = dev->of_node;
-	struct device_node *node;
-	struct device_node *np;
-	struct device_node *codec;
-	struct asoc_simple_card_data adata;
-	int loop;
-	int num;
 
 	/*
 	 * link_num :	number of links.
@@ -648,39 +664,11 @@ static void asoc_simple_card_get_dais_count(struct simple_card_data *priv,
 		return;
 	}
 
-	loop = 1;
-	node = of_get_child_by_name(top, PREFIX "dai-link");
-	if (!node) {
-		node = top;
-		loop = 0;
-	}
-
-	do {
-		num = of_get_child_count(node);
-
-		codec = of_get_child_by_name(node, !loop ?
-					     PREFIX "codec" : "codec");
-		if (!codec)
-			return;
-
-		of_node_put(codec);
-
-		memset(&adata, 0, sizeof(adata));
-		for_each_child_of_node(node, np)
-			asoc_simple_card_get_conversion(dev, np, &adata);
-
-		for_each_child_of_node(node, np) {
-			if (num > 2 ||
-			    adata.convert_rate || adata.convert_channels) {
-				asoc_simple_card_count_dpcm(priv, np, codec,
-							    li, !loop);
-			} else {
-				asoc_simple_card_count_noml(priv, np, codec,
-							    li, !loop);
-			}
-		}
-		node = of_get_next_child(top, node);
-	} while (loop && node);
+	asoc_simple_card_for_each_link(priv, li,
+				       asoc_simple_card_count_noml,
+				       asoc_simple_card_count_dpcm);
+	dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
+		li->link, li->dais, li->conf);
 }
 
 static int asoc_simple_soc_card_probe(struct snd_soc_card *card)