Merge series "ASoC: simple-card: cleanup and prepare for Multi CPU/Codec support" from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:

Hi Mark

I want to add new audio-graph-card2 driver which can support
not only DPCM, but also Multi-CPU/Codec, and Codec2Codec.
And it is also supporting user customization.

But before supporting such driver, we need to cleanup existing
simple-card / audio-graph, because these and new driver are
sharing code.

This patch-set are cleanup and prepare for Multi-CPU/Codec support.

Kuninori Morimoto (6):
  ASoC: simple-card-utils.c: remove old comment
  ASoC: simple-card-utils: alloc dai_link information for CPU/Codec/Platform
  ASoC: audio-graph: count DAI / link numbers as in order
  ASoC: audio-graph: cleanup graph_for_each_link()
  ASoC: simple-card: count DAI / link numbers as in order
  ASoC: simple-card: cleanup graph_for_each_link()

 include/sound/simple_card_utils.h     |   7 +-
 sound/soc/generic/audio-graph-card.c  | 112 +++++++++++++------------
 sound/soc/generic/simple-card-utils.c |  20 +++--
 sound/soc/generic/simple-card.c       | 115 +++++++++++++++-----------
 4 files changed, 143 insertions(+), 111 deletions(-)

--
2.25.1

4 files changed, 143 insertions, 111 deletions

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index ba4a3e1897b9..86e46cbf9e14 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -43,9 +43,9 @@ struct asoc_simple_priv {
 	struct simple_dai_props {
 		struct asoc_simple_dai *cpu_dai;
 		struct asoc_simple_dai *codec_dai;
-		struct snd_soc_dai_link_component cpus;   /* single cpu */
-		struct snd_soc_dai_link_component codecs; /* single codec */
-		struct snd_soc_dai_link_component platforms;
+		struct snd_soc_dai_link_component *cpus;
+		struct snd_soc_dai_link_component *codecs;
+		struct snd_soc_dai_link_component *platforms;
 		struct asoc_simple_data adata;
 		struct snd_soc_codec_conf *codec_conf;
 		unsigned int mclk_fs;
@@ -54,6 +54,7 @@ struct asoc_simple_priv {
 	struct asoc_simple_jack mic_jack;
 	struct snd_soc_dai_link *dai_link;
 	struct asoc_simple_dai *dais;
+	struct snd_soc_dai_link_component *dlcs;
 	struct snd_soc_codec_conf *codec_conf;
 	struct gpio_desc *pa_gpio;
 	const struct snd_soc_ops *ops;
diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index 8c5cdcdc8713..ee1d924d68e5 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -212,8 +212,7 @@ static void graph_parse_mclk_fs(struct device_node *top,
 static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
 				  struct device_node *cpu_ep,
 				  struct device_node *codec_ep,
-				  struct link_info *li,
-				  int dup_codec)
+				  struct link_info *li)
 {
 	struct device *dev = simple_priv_to_dev(priv);
 	struct snd_soc_card *card = simple_priv_to_card(priv);
@@ -229,18 +228,6 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
 	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
 	int ret;
 
-	/*
-	 * Codec endpoint can be NULL for pluggable audio HW.
-	 * Platform DT can populate the Codec endpoint depending on the
-	 * plugged HW.
-	 */
-	if (!li->cpu && !codec_ep)
-		return 0;
-
-	/* 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);
@@ -382,10 +369,6 @@ static int graph_dai_link_of(struct asoc_simple_priv *priv,
 	struct asoc_simple_dai *codec_dai;
 	int ret, single_cpu;
 
-	/* Do it only CPU turn */
-	if (!li->cpu)
-		return 0;
-
 	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
 
 	li->link++;
@@ -466,7 +449,7 @@ static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
 	return false;
 }
 
-static int graph_for_each_link(struct asoc_simple_priv *priv,
+static int __graph_for_each_link(struct asoc_simple_priv *priv,
 			struct link_info *li,
 			int (*func_noml)(struct asoc_simple_priv *priv,
 					 struct device_node *cpu_ep,
@@ -475,7 +458,7 @@ static int graph_for_each_link(struct asoc_simple_priv *priv,
 			int (*func_dpcm)(struct asoc_simple_priv *priv,
 					 struct device_node *cpu_ep,
 					 struct device_node *codec_ep,
-					 struct link_info *li, int dup_codec))
+					 struct link_info *li))
 {
 	struct of_phandle_iterator it;
 	struct device *dev = simple_priv_to_dev(priv);
@@ -486,7 +469,7 @@ static int graph_for_each_link(struct asoc_simple_priv *priv,
 	struct device_node *codec_port;
 	struct device_node *codec_port_old = NULL;
 	struct asoc_simple_data adata;
-	int rc, ret;
+	int rc, ret = 0;
 
 	/* loop for all listed CPU port */
 	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
@@ -509,12 +492,21 @@ static int graph_for_each_link(struct asoc_simple_priv *priv,
 			graph_parse_convert(dev, cpu_ep,   &adata);
 
 			/* check if link requires DPCM parsing */
-			if (parse_as_dpcm_link(priv, codec_port, &adata))
-				ret = func_dpcm(priv, cpu_ep, codec_ep, li,
-						(codec_port_old == codec_port));
+			if (parse_as_dpcm_link(priv, codec_port, &adata)) {
+				/*
+				 * Codec endpoint can be NULL for pluggable audio HW.
+				 * Platform DT can populate the Codec endpoint depending on the
+				 * plugged HW.
+				 */
+				/* Do it all CPU endpoint, and 1st Codec endpoint */
+				if (li->cpu ||
+				    ((codec_port_old != codec_port) && codec_ep))
+					ret = func_dpcm(priv, cpu_ep, codec_ep, li);
 			/* else normal sound */
-			else
-				ret = func_noml(priv, cpu_ep, codec_ep, li);
+			} else {
+				if (li->cpu)
+					ret = func_noml(priv, cpu_ep, codec_ep, li);
+			}
 
 			of_node_put(codec_ep);
 			of_node_put(codec_port);
@@ -529,6 +521,39 @@ static int graph_for_each_link(struct asoc_simple_priv *priv,
 	return 0;
 }
 
+static int graph_for_each_link(struct asoc_simple_priv *priv,
+			       struct link_info *li,
+			       int (*func_noml)(struct asoc_simple_priv *priv,
+						struct device_node *cpu_ep,
+						struct device_node *codec_ep,
+						struct link_info *li),
+			       int (*func_dpcm)(struct asoc_simple_priv *priv,
+						struct device_node *cpu_ep,
+						struct device_node *codec_ep,
+						struct link_info *li))
+{
+	int ret;
+	/*
+	 * Detect all CPU first, and Detect all Codec 2nd.
+	 *
+	 * In Normal sound case, all DAIs are detected
+	 * as "CPU-Codec".
+	 *
+	 * In DPCM sound case,
+	 * all CPUs   are detected as "CPU-dummy", and
+	 * all Codecs are detected as "dummy-Codec".
+	 * To avoid random sub-device numbering,
+	 * detect "dummy-Codec" in last;
+	 */
+	for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
+		ret = __graph_for_each_link(priv, li, func_noml, func_dpcm);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
 static void graph_get_dais_count(struct asoc_simple_priv *priv,
 				 struct link_info *li);
 
@@ -566,25 +591,11 @@ int audio_graph_parse_of(struct asoc_simple_priv *priv, struct device *dev)
 		return ret;
 
 	memset(&li, 0, sizeof(li));
-	for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
-		/*
-		 * Detect all CPU first, and Detect all Codec 2nd.
-		 *
-		 * In Normal sound case, all DAIs are detected
-		 * as "CPU-Codec".
-		 *
-		 * In DPCM sound case,
-		 * all CPUs   are detected as "CPU-dummy", and
-		 * all Codecs are detected as "dummy-Codec".
-		 * To avoid random sub-device numbering,
-		 * detect "dummy-Codec" in last;
-		 */
-		ret = graph_for_each_link(priv, &li,
-					  graph_dai_link_of,
-					  graph_dai_link_of_dpcm);
-		if (ret < 0)
-			goto err;
-	}
+	ret = graph_for_each_link(priv, &li,
+				  graph_dai_link_of,
+				  graph_dai_link_of_dpcm);
+	if (ret < 0)
+		goto err;
 
 	ret = asoc_simple_parse_card_name(card, NULL);
 	if (ret < 0)
@@ -628,15 +639,14 @@ static int graph_count_noml(struct asoc_simple_priv *priv,
 static int graph_count_dpcm(struct asoc_simple_priv *priv,
 			    struct device_node *cpu_ep,
 			    struct device_node *codec_ep,
-			    struct link_info *li,
-			    int dup_codec)
+			    struct link_info *li)
 {
 	struct device *dev = simple_priv_to_dev(priv);
 
-	li->link++; /* 1xCPU-dummy */
-	li->dais++; /* 1xCPU */
-
-	if (!dup_codec && codec_ep) {
+	if (li->cpu) {
+		li->link++; /* 1xCPU-dummy */
+		li->dais++; /* 1xCPU */
+	} else {
 		li->link++; /* 1xdummy-Codec */
 		li->conf++; /* 1xdummy-Codec */
 		li->dais++; /* 1xCodec */
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 06c2512b6f2d..f05954529dfc 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -601,13 +601,15 @@ int asoc_simple_init_priv(struct asoc_simple_priv *priv,
 	struct snd_soc_dai_link *dai_link;
 	struct simple_dai_props *dai_props;
 	struct asoc_simple_dai *dais;
+	struct snd_soc_dai_link_component *dlcs;
 	struct snd_soc_codec_conf *cconf = NULL;
 	int i;
 
 	dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
 	dai_link  = devm_kcalloc(dev, li->link, sizeof(*dai_link),  GFP_KERNEL);
 	dais      = devm_kcalloc(dev, li->dais, sizeof(*dais),      GFP_KERNEL);
-	if (!dai_props || !dai_link || !dais)
+	dlcs      = devm_kcalloc(dev, li->link * 3, sizeof(*dai_props), GFP_KERNEL);
+	if (!dai_props || !dai_link || !dais || !dlcs)
 		return -ENOMEM;
 
 	if (li->conf) {
@@ -617,27 +619,27 @@ int asoc_simple_init_priv(struct asoc_simple_priv *priv,
 	}
 
 	/*
-	 * 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()
-	 *
 	 * "platform" might be removed
 	 * see
 	 *	simple-card-utils.c :: asoc_simple_canonicalize_platform()
 	 */
 	for (i = 0; i < li->link; i++) {
-		dai_link[i].cpus		= &dai_props[i].cpus;
+		dai_props[i].cpus	= dlcs + (3 * i) + 0;
+		dai_props[i].codecs	= dlcs + (3 * i) + 1;
+		dai_props[i].platforms	= dlcs + (3 * i) + 2;
+
+		dai_link[i].cpus		= dai_props[i].cpus;
 		dai_link[i].num_cpus		= 1;
-		dai_link[i].codecs		= &dai_props[i].codecs;
+		dai_link[i].codecs		= dai_props[i].codecs;
 		dai_link[i].num_codecs		= 1;
-		dai_link[i].platforms		= &dai_props[i].platforms;
+		dai_link[i].platforms		= dai_props[i].platforms;
 		dai_link[i].num_platforms	= 1;
 	}
 
 	priv->dai_props		= dai_props;
 	priv->dai_link		= dai_link;
 	priv->dais		= dais;
+	priv->dlcs		= dlcs;
 	priv->codec_conf	= cconf;
 
 	card->dai_link		= priv->dai_link;
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 75365c7bb393..41aa40765a8d 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -129,15 +129,6 @@ static int simple_dai_link_of_dpcm(struct asoc_simple_priv *priv,
 	char *prefix = "";
 	int ret;
 
-	/*
-	 *	 |CPU   |Codec   : turn
-	 * CPU	 |Pass  |return
-	 * Codec |return|Pass
-	 * np
-	 */
-	if (li->cpu == (np == codec))
-		return 0;
-
 	dev_dbg(dev, "link_of DPCM (%pOF)\n", np);
 
 	li->link++;
@@ -260,15 +251,6 @@ static int simple_dai_link_of(struct asoc_simple_priv *priv,
 	char *prefix = "";
 	int ret, single_cpu;
 
-	/*
-	 *	 |CPU   |Codec   : turn
-	 * CPU	 |Pass  |return
-	 * Codec |return|return
-	 * np
-	 */
-	if (!li->cpu || np == codec)
-		return 0;
-
 	cpu  = np;
 	node = of_get_parent(np);
 	li->link++;
@@ -342,7 +324,7 @@ dai_link_of_err:
 	return ret;
 }
 
-static int simple_for_each_link(struct asoc_simple_priv *priv,
+static int __simple_for_each_link(struct asoc_simple_priv *priv,
 			struct link_info *li,
 			int (*func_noml)(struct asoc_simple_priv *priv,
 					 struct device_node *np,
@@ -402,11 +384,26 @@ static int simple_for_each_link(struct asoc_simple_priv *priv,
 			 */
 			if (dpcm_selectable &&
 			    (num > 2 ||
-			     adata.convert_rate || adata.convert_channels))
-				ret = func_dpcm(priv, np, codec, li, is_top);
+			     adata.convert_rate || adata.convert_channels)) {
+				/*
+				 * np
+				 *	 |1(CPU)|0(Codec)  li->cpu
+				 * CPU	 |Pass  |return
+				 * Codec |return|Pass
+				 */
+				if (li->cpu != (np == codec))
+					ret = func_dpcm(priv, np, codec, li, is_top);
 			/* else normal sound */
-			else
-				ret = func_noml(priv, np, codec, li, is_top);
+			} else {
+				/*
+				 * np
+				 *	 |1(CPU)|0(Codec)  li->cpu
+				 * CPU	 |Pass  |return
+				 * Codec |return|return
+				 */
+				if (li->cpu && (np != codec))
+					ret = func_noml(priv, np, codec, li, is_top);
+			}
 
 			if (ret < 0) {
 				of_node_put(codec);
@@ -424,6 +421,39 @@ static int simple_for_each_link(struct asoc_simple_priv *priv,
 	return ret;
 }
 
+static int simple_for_each_link(struct asoc_simple_priv *priv,
+				struct link_info *li,
+				int (*func_noml)(struct asoc_simple_priv *priv,
+						 struct device_node *np,
+						 struct device_node *codec,
+						 struct link_info *li, bool is_top),
+				int (*func_dpcm)(struct asoc_simple_priv *priv,
+						 struct device_node *np,
+						 struct device_node *codec,
+						 struct link_info *li, bool is_top))
+{
+	int ret;
+	/*
+	 * Detect all CPU first, and Detect all Codec 2nd.
+	 *
+	 * In Normal sound case, all DAIs are detected
+	 * as "CPU-Codec".
+	 *
+	 * In DPCM sound case,
+	 * all CPUs   are detected as "CPU-dummy", and
+	 * all Codecs are detected as "dummy-Codec".
+	 * To avoid random sub-device numbering,
+	 * detect "dummy-Codec" in last;
+	 */
+	for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
+		ret = __simple_for_each_link(priv, li, func_noml, func_dpcm);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
 static int simple_parse_of(struct asoc_simple_priv *priv)
 {
 	struct device *dev = simple_priv_to_dev(priv);
@@ -449,25 +479,11 @@ static int simple_parse_of(struct asoc_simple_priv *priv)
 
 	/* Single/Muti DAI link(s) & New style of DT node */
 	memset(&li, 0, sizeof(li));
-	for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
-		/*
-		 * Detect all CPU first, and Detect all Codec 2nd.
-		 *
-		 * In Normal sound case, all DAIs are detected
-		 * as "CPU-Codec".
-		 *
-		 * In DPCM sound case,
-		 * all CPUs   are detected as "CPU-dummy", and
-		 * all Codecs are detected as "dummy-Codec".
-		 * To avoid random sub-device numbering,
-		 * detect "dummy-Codec" in last;
-		 */
-		ret = simple_for_each_link(priv, &li,
-					   simple_dai_link_of,
-					   simple_dai_link_of_dpcm);
-		if (ret < 0)
-			return ret;
-	}
+	ret = simple_for_each_link(priv, &li,
+				   simple_dai_link_of,
+				   simple_dai_link_of_dpcm);
+	if (ret < 0)
+		return ret;
 
 	ret = asoc_simple_parse_card_name(card, PREFIX);
 	if (ret < 0)
@@ -483,9 +499,8 @@ static int simple_count_noml(struct asoc_simple_priv *priv,
 			     struct device_node *codec,
 			     struct link_info *li, bool is_top)
 {
-	li->dais++; /* CPU or Codec */
-	if (np != codec)
-		li->link++; /* CPU-Codec */
+	li->link += 1;
+	li->dais += 2;
 
 	return 0;
 }
@@ -495,10 +510,14 @@ static int simple_count_dpcm(struct asoc_simple_priv *priv,
 			     struct device_node *codec,
 			     struct link_info *li, bool is_top)
 {
-	li->dais++; /* CPU or Codec */
-	li->link++; /* CPU-dummy or dummy-Codec */
-	if (np == codec)
+	if (li->cpu) {
+		li->link++; /* CPU-dummy */
+		li->dais++;
+	} else {
+		li->link++; /* dummy-Codec */
+		li->dais++;
 		li->conf++;
+	}
 
 	return 0;
 }