ASoC: rsnd: use mod array instead of list on rdai

struct rsnd_dai_stream used list for mod list.
It added only odd flexibility to current driver, and
it is a factor which makes extendibility difficult.
rsnd use mod array instead of list from now.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/sh/rcar/core.c

@@ -121,12 +121,13 @@ char *rsnd_mod_name(struct rsnd_mod *mod)
 void rsnd_mod_init(struct rsnd_priv *priv,
 		   struct rsnd_mod *mod,
 		   struct rsnd_mod_ops *ops,
+		   enum rsnd_mod_type type,
 		   int id)
 {
 	mod->priv	= priv;
 	mod->id		= id;
 	mod->ops	= ops;
-	INIT_LIST_HEAD(&mod->list);
+	mod->type	= type;
 }
 
 /*
@@ -307,9 +308,12 @@ void  rsnd_dma_quit(struct rsnd_priv *priv,
 
 #define rsnd_dai_call(rdai, io, fn)				\
 ({								\
-	struct rsnd_mod *mod, *n;				\
-	int ret = 0;						\
-	for_each_rsnd_mod(mod, n, (io)) {			\
+	struct rsnd_mod *mod;					\
+	int ret = 0, i;						\
+	for (i = 0; i < RSND_MOD_MAX; i++) {			\
+		mod = (io)->mod[i];				\
+		if (!mod)					\
+			continue;				\
 		ret = rsnd_mod_call(mod, fn, (rdai), (io));	\
 		if (ret < 0)					\
 			break;					\
@@ -317,14 +321,13 @@ void  rsnd_dma_quit(struct rsnd_priv *priv,
 	ret;							\
 })
 
-static int rsnd_dai_connect(struct rsnd_dai *rdai,
-			    struct rsnd_mod *mod,
+static int rsnd_dai_connect(struct rsnd_mod *mod,
 			    struct rsnd_dai_stream *io)
 {
 	if (!mod)
 		return -EIO;
 
-	if (!list_empty(&mod->list)) {
+	if (io->mod[mod->type]) {
 		struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 		struct device *dev = rsnd_priv_to_dev(priv);
 
@@ -334,15 +337,15 @@ static int rsnd_dai_connect(struct rsnd_dai *rdai,
 		return -EIO;
 	}
 
-	list_add_tail(&mod->list, &io->head);
+	io->mod[mod->type] = mod;
 	mod->io = io;
 
 	return 0;
 }
 
-static int rsnd_dai_disconnect(struct rsnd_mod *mod)
+static int rsnd_dai_disconnect(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 {
-	list_del_init(&mod->list);
+	io->mod[mod->type] = NULL;
 	mod->io = NULL;
 
 	return 0;
@@ -596,7 +599,7 @@ static int rsnd_path_init(struct rsnd_priv *priv,
 	/* SCU */
 	mod = rsnd_scu_mod_get(priv, id);
 	if (mod) {
-		ret = rsnd_dai_connect(rdai, mod, io);
+		ret = rsnd_dai_connect(mod, io);
 		if (ret < 0)
 			return ret;
 	}
@@ -604,7 +607,7 @@ static int rsnd_path_init(struct rsnd_priv *priv,
 	/* SSI */
 	mod = rsnd_ssi_mod_get(priv, id);
 	if (mod) {
-		ret = rsnd_dai_connect(rdai, mod, io);
+		ret = rsnd_dai_connect(mod, io);
 		if (ret < 0)
 			return ret;
 	}
@@ -616,14 +619,18 @@ static int rsnd_path_exit(struct rsnd_priv *priv,
 			  struct rsnd_dai *rdai,
 			  struct rsnd_dai_stream *io)
 {
-	struct rsnd_mod *mod, *n;
-	int ret = 0;
+	struct rsnd_mod *mod;
+	int ret = 0, i;
 
 	/*
 	 * remove all mod from rdai
 	 */
-	for_each_rsnd_mod(mod, n, io)
-		ret |= rsnd_dai_disconnect(mod);
+	for (i = 0; i < RSND_MOD_MAX; i++) {
+		mod = io->mod[i];
+		if (!mod)
+			continue;
+		ret |= rsnd_dai_disconnect(mod, io);
+	}
 
 	return ret;
 }
@@ -671,9 +678,6 @@ static int rsnd_dai_probe(struct platform_device *pdev,
 		/*
 		 *	init rsnd_dai
 		 */
-		INIT_LIST_HEAD(&rdai[i].playback.head);
-		INIT_LIST_HEAD(&rdai[i].capture.head);
-
 		snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 
 		/*

sound/soc/sh/rcar/rsnd.h

@@ -135,6 +135,11 @@ void  rsnd_dma_quit(struct rsnd_priv *priv,
 /*
  *	R-Car sound mod
  */
+enum rsnd_mod_type {
+	RSND_MOD_SCU = 0,
+	RSND_MOD_SSI,
+	RSND_MOD_MAX,
+};
 
 struct rsnd_mod_ops {
 	char *name;
@@ -155,9 +160,9 @@ struct rsnd_mod_ops {
 struct rsnd_dai_stream;
 struct rsnd_mod {
 	int id;
+	enum rsnd_mod_type type;
 	struct rsnd_priv *priv;
 	struct rsnd_mod_ops *ops;
-	struct list_head list; /* connect to rsnd_dai playback/capture */
 	struct rsnd_dma dma;
 	struct rsnd_dai_stream *io;
 };
@@ -167,12 +172,11 @@ struct rsnd_mod {
 #define rsnd_dma_to_mod(_dma) container_of((_dma), struct rsnd_mod, dma)
 #define rsnd_mod_to_io(mod) ((mod)->io)
 #define rsnd_mod_id(mod) ((mod)->id)
-#define for_each_rsnd_mod(pos, n, io)	\
-	list_for_each_entry_safe(pos, n, &(io)->head, list)
 
 void rsnd_mod_init(struct rsnd_priv *priv,
 		   struct rsnd_mod *mod,
 		   struct rsnd_mod_ops *ops,
+		   enum rsnd_mod_type type,
 		   int id);
 char *rsnd_mod_name(struct rsnd_mod *mod);
 
@@ -181,8 +185,8 @@ char *rsnd_mod_name(struct rsnd_mod *mod);
  */
 #define RSND_DAI_NAME_SIZE	16
 struct rsnd_dai_stream {
-	struct list_head head; /* head of rsnd_mod list */
 	struct snd_pcm_substream *substream;
+	struct rsnd_mod *mod[RSND_MOD_MAX];
 	int byte_pos;
 	int period_pos;
 	int byte_per_period;

sound/soc/sh/rcar/scu.c

@@ -659,7 +659,7 @@ int rsnd_scu_probe(struct platform_device *pdev,
 				ops = &rsnd_scu_non_gen2_ops;
 		}
 
-		rsnd_mod_init(priv, &scu->mod, ops, i);
+		rsnd_mod_init(priv, &scu->mod, ops, RSND_MOD_SCU, i);
 
 		dev_dbg(dev, "SCU%d probed\n", i);
 	}

sound/soc/sh/rcar/ssi.c

@@ -584,7 +584,7 @@ int rsnd_ssi_probe(struct platform_device *pdev,
 			dev_dbg(dev, "SSI%d use PIO transfer\n", i);
 		}
 
-		rsnd_mod_init(priv, &ssi->mod, ops, i);
+		rsnd_mod_init(priv, &ssi->mod, ops, RSND_MOD_SSI, i);
 
 		rsnd_ssi_parent_clk_setup(priv, ssi);
 	}