ASoC: audio-graph-card: cleanup DAI link loop method - step1

Current audio-graph-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 adds/modifies counting and parsing function for
"normal sound" and "DPCM sound", and call it from link loop.
This is prepare for cleanup DAI link loop method.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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

@@ -192,23 +192,32 @@ static void asoc_graph_card_get_conversion(struct device *dev,
 	asoc_simple_card_parse_convert(dev, ep,    NULL,   adata);
 }
 
-static int asoc_graph_card_dai_link_of_dpcm(struct device_node *top,
+static int asoc_graph_card_dai_link_of_dpcm(struct graph_card_data *priv,
 					    struct device_node *cpu_ep,
 					    struct device_node *codec_ep,
-					    struct graph_card_data *priv,
-					    struct link_info *li)
+					    struct link_info *li,
+					    int dup_codec)
 {
 	struct device *dev = graph_priv_to_dev(priv);
 	struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, li->link);
 	struct graph_dai_props *dai_props = graph_priv_to_props(priv, li->link);
+	struct device_node *top = dev->of_node;
 	struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
-	struct device_node *port = of_get_parent(ep);
-	struct device_node *ports = of_get_parent(port);
-	struct device_node *node = of_graph_get_port_parent(ep);
+	struct device_node *port;
+	struct device_node *ports;
+	struct device_node *node;
 	struct asoc_simple_dai *dai;
 	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
 	int ret;
 
+	/* Do it all CPU endpoint, and 1st Codec endpoint */
+	if (!li->cpu && dup_codec)
+		return 0;
+
+	port	= of_get_parent(ep);
+	ports	= of_get_parent(port);
+	node	= of_graph_get_port_parent(ep);
+
 	li->link++;
 
 	dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
@@ -222,6 +231,7 @@ static int asoc_graph_card_dai_link_of_dpcm(struct device_node *top,
 
 	of_node_put(ports);
 	of_node_put(port);
+	of_node_put(node);
 
 	if (li->cpu) {
 
@@ -318,23 +328,32 @@ static int asoc_graph_card_dai_link_of_dpcm(struct device_node *top,
 	return 0;
 }
 
-static int asoc_graph_card_dai_link_of(struct device_node *top,
+static int asoc_graph_card_dai_link_of(struct graph_card_data *priv,
 					struct device_node *cpu_ep,
 					struct device_node *codec_ep,
-					struct graph_card_data *priv,
 					struct link_info *li)
 {
 	struct device *dev = graph_priv_to_dev(priv);
 	struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, li->link);
 	struct graph_dai_props *dai_props = graph_priv_to_props(priv, li->link);
-	struct device_node *cpu_port = of_get_parent(cpu_ep);
-	struct device_node *codec_port = of_get_parent(codec_ep);
-	struct device_node *cpu_ports = of_get_parent(cpu_port);
-	struct device_node *codec_ports = of_get_parent(codec_port);
+	struct device_node *top = dev->of_node;
+	struct device_node *cpu_port;
+	struct device_node *codec_port;
+	struct device_node *cpu_ports;
+	struct device_node *codec_ports;
 	struct asoc_simple_dai *cpu_dai;
 	struct asoc_simple_dai *codec_dai;
 	int ret;
 
+	/* Do it only CPU turn */
+	if (!li->cpu)
+		return 0;
+
+	cpu_port	= of_get_parent(cpu_ep);
+	cpu_ports	= of_get_parent(cpu_port);
+	codec_port	= of_get_parent(codec_ep);
+	codec_ports	= of_get_parent(codec_port);
+
 	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
 
 	li->link++;
@@ -471,22 +490,19 @@ static int asoc_graph_card_parse_of(struct graph_card_data *priv)
 					/*
 					 * for DPCM sound
 					 */
-					if (!li.cpu) {
-						if (codec_port_old == codec_port)
-							continue;
-						codec_port_old = codec_port;
-					}
 					ret = asoc_graph_card_dai_link_of_dpcm(
-						top, cpu_ep, codec_ep, priv, &li);
+						priv, cpu_ep, codec_ep, &li,
+						(codec_port_old == codec_port));
 				} else if (li.cpu) {
 					/*
 					 * for Normal sound
 					 */
 					ret = asoc_graph_card_dai_link_of(
-						top, cpu_ep, codec_ep, priv, &li);
+						priv, cpu_ep, codec_ep, &li);
 				}
 				if (ret < 0)
 					return ret;
+				codec_port_old = codec_port;
 			}
 		}
 	}
@@ -494,9 +510,47 @@ static int asoc_graph_card_parse_of(struct graph_card_data *priv)
 	return asoc_simple_card_parse_card_name(card, NULL);
 }
 
-static void asoc_graph_get_dais_count(struct device *dev,
+static int asoc_graph_card_count_noml(struct graph_card_data *priv,
+				      struct device_node *cpu_ep,
+				      struct device_node *codec_ep,
 				      struct link_info *li)
 {
+	struct device *dev = graph_priv_to_dev(priv);
+
+	li->link += 1; /* 1xCPU-Codec */
+	li->dais += 2; /* 1xCPU + 1xCodec */
+
+	dev_dbg(dev, "Count As Normal\n");
+
+	return 0;
+}
+
+static int asoc_graph_card_count_dpcm(struct graph_card_data *priv,
+				      struct device_node *cpu_ep,
+				      struct device_node *codec_ep,
+				      struct link_info *li,
+				      int dup_codec)
+{
+	struct device *dev = graph_priv_to_dev(priv);
+
+	li->link++; /* 1xCPU-dummy */
+	li->dais++; /* 1xCPU */
+
+	if (!dup_codec) {
+		li->link++; /* 1xdummy-Codec */
+		li->conf++; /* 1xdummy-Codec */
+		li->dais++; /* 1xCodec */
+	}
+
+	dev_dbg(dev, "Count As DPCM\n");
+
+	return 0;
+}
+
+static void asoc_graph_get_dais_count(struct graph_card_data *priv,
+				      struct link_info *li)
+{
+	struct device *dev = graph_priv_to_dev(priv);
 	struct of_phandle_iterator it;
 	struct device_node *node = dev->of_node;
 	struct device_node *cpu_port;
@@ -568,24 +622,18 @@ static void asoc_graph_get_dais_count(struct device *dev,
 			of_node_put(codec_ep);
 			of_node_put(codec_port);
 
-			li->link++;
-			li->dais++;
-
 			memset(&adata, 0, sizeof(adata));
 			asoc_graph_card_get_conversion(dev, codec_ep, &adata);
 			asoc_graph_card_get_conversion(dev, cpu_ep,   &adata);
 
 			if ((of_get_child_count(codec_port) > 1) ||
 			    adata.convert_rate || adata.convert_channels) {
-
-				if (codec_port_old == codec_port)
-					continue;
-
-				li->link++;
-				li->conf++;
-				li->dais++;
+				asoc_graph_card_count_dpcm(priv,
+						cpu_ep, codec_ep, li,
+						(codec_port_old == codec_port));
 			} else {
-				li->dais++;
+				asoc_graph_card_count_noml(priv,
+						cpu_ep, codec_ep, li);
 			}
 			codec_port_old = codec_port;
 		}
@@ -625,8 +673,15 @@ static int asoc_graph_card_probe(struct platform_device *pdev)
 	if (!priv)
 		return -ENOMEM;
 
+	card = graph_priv_to_card(priv);
+	card->owner		= THIS_MODULE;
+	card->dev		= dev;
+	card->dapm_widgets	= asoc_graph_card_dapm_widgets;
+	card->num_dapm_widgets	= ARRAY_SIZE(asoc_graph_card_dapm_widgets);
+	card->probe		= asoc_graph_soc_card_probe;
+
 	memset(&li, 0, sizeof(li));
-	asoc_graph_get_dais_count(dev, &li);
+	asoc_graph_get_dais_count(priv, &li);
 	if (!li.link || !li.dais)
 		return -EINVAL;
 
@@ -656,20 +711,13 @@ static int asoc_graph_card_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	priv->dai_props			= dai_props;
-	priv->dai_link			= dai_link;
-	priv->dais			= dais;
-	priv->codec_conf		= cconf;
+	priv->dai_props		= dai_props;
+	priv->dai_link		= dai_link;
+	priv->dais		= dais;
+	priv->codec_conf	= cconf;
 
-	/* Init snd_soc_card */
-	card = graph_priv_to_card(priv);
-	card->owner		= THIS_MODULE;
-	card->dev		= dev;
 	card->dai_link		= dai_link;
 	card->num_links		= li.link;
-	card->dapm_widgets	= asoc_graph_card_dapm_widgets;
-	card->num_dapm_widgets	= ARRAY_SIZE(asoc_graph_card_dapm_widgets);
-	card->probe		= asoc_graph_soc_card_probe;
 	card->codec_conf	= cconf;
 	card->num_configs	= li.conf;