ASoC: rsnd: add struct rsnd_dai_platform_info

R-Car sound DAI consists from SSI/SCU/SSIU/SRU...
Current R-Car sound DAI is decided from these settings,
but it is intuitively unclear, and is not good design for DT support.
This patch adds new rsnd_dai_platform_info to solve this issue.

But now, many platform is using this driver without
rsnd_dai_platform_info.
So, this patch still supports DAI settings via SSI to keep compatible.
It will be removed in next Linux version.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

include/sound/rcar_snd.h

@@ -36,13 +36,15 @@
 #define RSND_SSI_CLK_PIN_SHARE		(1 << 31)
 #define RSND_SSI_PLAY			(1 << 24)
 
+#define RSND_SSI(_dma_id, _pio_irq, _flags)		\
+{ .dma_id = _dma_id, .pio_irq = _pio_irq, .flags = _flags }
 #define RSND_SSI_SET(_dai_id, _dma_id, _pio_irq, _flags)	\
 { .dai_id = _dai_id, .dma_id = _dma_id, .pio_irq = _pio_irq, .flags = _flags }
 #define RSND_SSI_UNUSED \
 { .dai_id = -1, .dma_id = -1, .pio_irq = -1, .flags = 0 }
 
 struct rsnd_ssi_platform_info {
-	int dai_id;
+	int dai_id;	/* will be removed */
 	int dma_id;
 	int pio_irq;
 	u32 flags;
@@ -53,6 +55,8 @@ struct rsnd_ssi_platform_info {
  */
 #define RSND_SCU_USE_HPBIF		(1 << 31) /* it needs RSND_SSI_DEPENDENT */
 
+#define RSND_SCU(rate, _dma_id)						\
+{ .flags = RSND_SCU_USE_HPBIF, .convert_rate = rate, .dma_id = _dma_id, }
 #define RSND_SCU_SET(rate, _dma_id)		\
 	{ .flags = RSND_SCU_USE_HPBIF, .convert_rate = rate, .dma_id = _dma_id, }
 #define RSND_SCU_UNUSED				\
@@ -64,6 +68,15 @@ struct rsnd_scu_platform_info {
 	int dma_id; /* for Gen2 SCU */
 };
 
+struct rsnd_dai_path_info {
+	struct rsnd_ssi_platform_info *ssi;
+};
+
+struct rsnd_dai_platform_info {
+	struct rsnd_dai_path_info playback;
+	struct rsnd_dai_path_info capture;
+};
+
 /*
  * flags
  *
@@ -81,6 +94,8 @@ struct rcar_snd_info {
 	int ssi_info_nr;
 	struct rsnd_scu_platform_info *scu_info;
 	int scu_info_nr;
+	struct rsnd_dai_platform_info *dai_info;
+	int dai_info_nr;
 	int (*start)(int id);
 	int (*stop)(int id);
 };

sound/soc/sh/rcar/core.c

@@ -639,19 +639,26 @@ static int rsnd_dai_probe(struct platform_device *pdev,
 			  struct rsnd_priv *priv)
 {
 	struct snd_soc_dai_driver *drv;
+	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 	struct rsnd_dai *rdai;
 	struct rsnd_mod *pmod, *cmod;
 	struct device *dev = rsnd_priv_to_dev(priv);
-	int dai_nr;
+	int dai_nr = info->dai_info_nr;
 	int i;
 
-	/* get max dai nr */
-	for (dai_nr = 0; dai_nr < 32; dai_nr++) {
-		pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
-		cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
+	/*
+	 * dai_nr should be set via dai_info_nr,
+	 * but allow it to keeping compatible
+	 */
+	if (!dai_nr) {
+		/* get max dai nr */
+		for (dai_nr = 0; dai_nr < 32; dai_nr++) {
+			pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
+			cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 
-		if (!pmod && !cmod)
-			break;
+			if (!pmod && !cmod)
+				break;
+		}
 	}
 
 	if (!dai_nr) {
@@ -671,6 +678,8 @@ static int rsnd_dai_probe(struct platform_device *pdev,
 	priv->rdai	= rdai;
 
 	for (i = 0; i < dai_nr; i++) {
+		if (info->dai_info)
+			rdai[i].info = &info->dai_info[i];
 
 		pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 		cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);

sound/soc/sh/rcar/ssi.c

@@ -451,12 +451,26 @@ static struct rsnd_mod_ops rsnd_ssi_non_ops = {
 struct rsnd_mod *rsnd_ssi_mod_get_frm_dai(struct rsnd_priv *priv,
 					  int dai_id, int is_play)
 {
+	struct rsnd_dai_platform_info *dai_info = NULL;
+	struct rsnd_dai_path_info *path_info = NULL;
+	struct rsnd_ssi_platform_info *target_info = NULL;
 	struct rsnd_ssi *ssi;
 	int i, has_play;
 
+	if (priv->rdai)
+		dai_info = priv->rdai[dai_id].info;
+	if (dai_info)
+		path_info = (is_play) ? &dai_info->playback : &dai_info->capture;
+	if (path_info)
+		target_info = path_info->ssi;
+
 	is_play = !!is_play;
 
 	for_each_rsnd_ssi(ssi, priv, i) {
+		if (target_info == ssi->info)
+			return &ssi->mod;
+
+		/* for compatible */
 		if (rsnd_ssi_dai_id(ssi) != dai_id)
 			continue;