ASoC: rsnd: fixup TDM Split mode check for CTU

Renesas sound card need to judge that whether it is using
"TDM Split mode". To judge it and for other purpose, it has
rsnd_parse_connect_simple() and rsnd_parse_connect_graph(),
but these are using different judgement policy for
TDM Split mode.
It is pointless and confusable.
This patch add new rsnd_parse_tdm_split_mode() and use common
judgement policy for simple-card/audio-graph.

Without this patch, CTU will be judged as TDM Split mode
on audio-graph card.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/core.c

@@ -1031,7 +1031,7 @@ static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 	.prepare	= rsnd_soc_dai_prepare,
 };
 
-static void rsnd_parse_connect_simple(struct rsnd_priv *priv,
+static void rsnd_parse_tdm_split_mode(struct rsnd_priv *priv,
 				      struct rsnd_dai_stream *io,
 				      struct device_node *dai_np)
 {
@@ -1044,9 +1044,6 @@ static void rsnd_parse_connect_simple(struct rsnd_priv *priv,
 	if (!ssiu_np)
 		return;
 
-	if (!rsnd_io_to_mod_ssi(io))
-		return;
-
 	/*
 	 * This driver assumes that it is TDM Split mode
 	 * if it includes ssiu node
@@ -1071,12 +1068,21 @@ static void rsnd_parse_connect_simple(struct rsnd_priv *priv,
 	}
 }
 
+static void rsnd_parse_connect_simple(struct rsnd_priv *priv,
+				      struct rsnd_dai_stream *io,
+				      struct device_node *dai_np)
+{
+	if (!rsnd_io_to_mod_ssi(io))
+		return;
+
+	rsnd_parse_tdm_split_mode(priv, io, dai_np);
+}
+
 static void rsnd_parse_connect_graph(struct rsnd_priv *priv,
 				     struct rsnd_dai_stream *io,
 				     struct device_node *endpoint)
 {
 	struct device *dev = rsnd_priv_to_dev(priv);
-	struct device_node *remote_port = of_graph_get_remote_port(endpoint);
 	struct device_node *remote_node = of_graph_get_remote_port_parent(endpoint);
 
 	if (!rsnd_io_to_mod_ssi(io))
@@ -1094,14 +1100,7 @@ static void rsnd_parse_connect_graph(struct rsnd_priv *priv,
 		dev_dbg(dev, "%s connected to HDMI1\n", io->name);
 	}
 
-	/*
-	 * This driver assumes that it is TDM Split mode
-	 * if remote node has multi endpoint
-	 */
-	if (of_get_child_count(remote_port) > 1) {
-		rsnd_flags_set(io, RSND_STREAM_TDM_SPLIT);
-		dev_dbg(dev, "%s is part of TDM Split\n", io->name);
-	}
+	rsnd_parse_tdm_split_mode(priv, io, endpoint);
 }
 
 void rsnd_parse_connect_common(struct rsnd_dai *rdai,