ASoC: rsnd: add rsnd_runtime_channel_xxx()

Current SSI is supporting Normal SSI/Multi mode SSI/TDM mode SSI
and its behavior is based on input channels.
This input channel might be converted by CTU,
and SSI needs to be Multi SSI mode / TDM SSI mode if 6ch input

EX) 6ch input, CTU for 2ch, playback

 6ch    6ch    2ch    2ch    2ch     2ch
 -> SRC -> CTU -> MIX -> DVC -> SSIU -> SSI

EX) 6ch input, no CTU, Multi SSI, playback

 6ch    6ch    6ch    6ch    6ch     2ch
 -> SRC -> CTU -> MIX -> DVC -> SSIU -> SSI0/SSI1/SSI2

Current driver is using rsnd_get_adinr_chan() / rsnd_get_slot_width()
for this purpose, but it is complicated enough without meaning.
This patch adds new rsnd_runtime_channel_xxx() which is caring
CTU/Multi SSI.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/core.c

@@ -224,13 +224,36 @@ int rsnd_get_slot_num(struct rsnd_dai_stream *io)
 	return rdai->slots_num;
 }
 
-int rsnd_get_slot_width(struct rsnd_dai_stream *io)
+int rsnd_runtime_channel_original(struct rsnd_dai_stream *io)
 {
 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
-	int chan = runtime->channels;
 
-	/* Multi channel Mode */
-	if (rsnd_ssi_multi_slaves_runtime(io))
+	return runtime->channels;
+}
+
+int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io)
+{
+	int chan = rsnd_runtime_channel_original(io);
+	struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
+
+	if (ctu_mod) {
+		u32 converted_chan = rsnd_ctu_converted_channel(ctu_mod);
+
+		if (converted_chan)
+			return converted_chan;
+	}
+
+	return chan;
+}
+
+int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io)
+{
+	int chan = rsnd_io_is_play(io) ?
+		rsnd_runtime_channel_after_ctu(io) :
+		rsnd_runtime_channel_original(io);
+
+	/* Use Multi SSI */
+	if (rsnd_runtime_is_ssi_multi(io))
 		chan /= rsnd_get_slot_num(io);
 
 	/* TDM Extend Mode needs 8ch */
@@ -240,6 +263,21 @@ int rsnd_get_slot_width(struct rsnd_dai_stream *io)
 	return chan;
 }
 
+int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io)
+{
+	int slots = rsnd_get_slot_num(io);
+	int chan = rsnd_io_is_play(io) ?
+		rsnd_runtime_channel_after_ctu(io) :
+		rsnd_runtime_channel_original(io);
+
+	return (chan >= 6) && (slots > 1);
+}
+
+int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io)
+{
+	return rsnd_runtime_channel_for_ssi(io) >= 6;
+}
+
 /*
  *	ADINR function
  */
@@ -261,29 +299,6 @@ u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 	return 0;
 }
 
-u32 rsnd_get_adinr_chan(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
-{
-	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
-	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
-	struct device *dev = rsnd_priv_to_dev(priv);
-	u32 chan = runtime->channels;
-
-	switch (chan) {
-	case 1:
-	case 2:
-	case 4:
-	case 6:
-	case 8:
-		break;
-	default:
-		dev_warn(dev, "not supported channel\n");
-		chan = 0;
-		break;
-	}
-
-	return chan;
-}
-
 /*
  *	DALIGN function
  */

sound/soc/sh/rcar/ctu.c

@@ -60,7 +60,7 @@ static void rsnd_ctu_value_init(struct rsnd_dai_stream *io,
 {
 	rsnd_mod_write(mod, CTU_CTUIR, 1);
 
-	rsnd_mod_write(mod, CTU_ADINR, rsnd_get_adinr_chan(mod, io));
+	rsnd_mod_write(mod, CTU_ADINR, rsnd_runtime_channel_original(io));
 
 	rsnd_mod_write(mod, CTU_CPMDR, 0);
 	rsnd_mod_write(mod, CTU_SCMDR, 0);

sound/soc/sh/rcar/dvc.c

@@ -116,7 +116,7 @@ static void rsnd_dvc_volume_init(struct rsnd_dai_stream *io,
 	u32 vrdbr = 0;
 
 	adinr = rsnd_get_adinr_bit(mod, io) |
-		rsnd_get_adinr_chan(mod, io);
+		rsnd_runtime_channel_after_ctu(io);
 
 	/* Enable Digital Volume, Zero Cross Mute Mode */
 	dvucr |= 0x101;

sound/soc/sh/rcar/mix.c

@@ -51,7 +51,7 @@ static void rsnd_mix_volume_init(struct rsnd_dai_stream *io,
 	rsnd_mod_write(mod, MIX_MIXIR, 1);
 
 	/* General Information */
-	rsnd_mod_write(mod, MIX_ADINR, rsnd_get_adinr_chan(mod, io));
+	rsnd_mod_write(mod, MIX_ADINR, rsnd_runtime_channel_after_ctu(io));
 
 	/* volume step */
 	rsnd_mod_write(mod, MIX_MIXMR, 0);

sound/soc/sh/rcar/rsnd.h

@@ -193,7 +193,6 @@ void rsnd_force_write(struct rsnd_priv *priv, struct rsnd_mod *mod,
 void rsnd_bset(struct rsnd_priv *priv, struct rsnd_mod *mod, enum rsnd_reg reg,
 		    u32 mask, u32 data);
 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io);
-u32 rsnd_get_adinr_chan(struct rsnd_mod *mod, struct rsnd_dai_stream *io);
 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io);
 
 /*
@@ -356,9 +355,14 @@ void rsnd_parse_connect_common(struct rsnd_dai *rdai,
 void rsnd_set_slot(struct rsnd_dai *rdai,
 		   int slots, int slots_total);
 int rsnd_get_slot(struct rsnd_dai_stream *io);
-int rsnd_get_slot_width(struct rsnd_dai_stream *io);
 int rsnd_get_slot_num(struct rsnd_dai_stream *io);
 
+int rsnd_runtime_channel_original(struct rsnd_dai_stream *io);
+int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io);
+int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io);
+int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io);
+int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io);
+
 /*
  *	R-Car sound DAI
  */

sound/soc/sh/rcar/src.c

@@ -205,7 +205,7 @@ static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io,
 	 *	SRC_ADINR
 	 */
 	adinr = rsnd_get_adinr_bit(mod, io) |
-		rsnd_get_adinr_chan(mod, io);
+		rsnd_runtime_channel_original(io);
 
 	/*
 	 *	SRC_IFSCR / SRC_IFSVR

sound/soc/sh/rcar/ssi.c

@@ -180,11 +180,8 @@ static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io)
 
 u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io)
 {
-	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
-	u32 mask = rsnd_ssi_multi_slaves(io);
-
-	if (mask && (runtime->channels >= 6))
-		return mask;
+	if (rsnd_runtime_is_ssi_multi(io))
+		return rsnd_ssi_multi_slaves(io);
 
 	return 0;
 }
@@ -198,7 +195,7 @@ static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
 	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
 	struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
-	int slots = rsnd_get_slot_width(io);
+	int chan = rsnd_runtime_channel_for_ssi(io);
 	int j, ret;
 	int ssi_clk_mul_table[] = {
 		1, 2, 4, 8, 16, 6, 12,
@@ -231,10 +228,10 @@ static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
 
 		/*
 		 * this driver is assuming that
-		 * system word is 32bit x slots
+		 * system word is 32bit x chan
 		 * see rsnd_ssi_init()
 		 */
-		main_rate = rate * 32 * slots * ssi_clk_mul_table[j];
+		main_rate = rate * 32 * chan * ssi_clk_mul_table[j];
 
 		ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
 		if (0 == ret) {
@@ -289,7 +286,7 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod,
 	u32 wsr;
 	int is_tdm;
 
-	is_tdm = (rsnd_get_slot_width(io) >= 6) ? 1 : 0;
+	is_tdm = rsnd_runtime_is_ssi_tdm(io);
 
 	/*
 	 * always use 32bit system word.

sound/soc/sh/rcar/ssiu.c

@@ -105,7 +105,7 @@ static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
 	if (ret < 0)
 		return ret;
 
-	if (rsnd_get_slot_width(io) >= 6) {
+	if (rsnd_runtime_is_ssi_tdm(io)) {
 		/*
 		 * TDM Extend Mode
 		 * see
@@ -117,7 +117,9 @@ static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
 	if (rsnd_ssi_use_busif(io)) {
 		rsnd_mod_write(mod, SSI_BUSIF_ADINR,
 			       rsnd_get_adinr_bit(mod, io) |
-			       rsnd_get_adinr_chan(mod, io));
+			       (rsnd_io_is_play(io) ?
+				rsnd_runtime_channel_after_ctu(io) :
+				rsnd_runtime_channel_original(io)));
 		rsnd_mod_write(mod, SSI_BUSIF_MODE,  1);
 		rsnd_mod_write(mod, SSI_BUSIF_DALIGN,
 			       rsnd_get_dalign(mod, io));