[PATCH 3/6] ASoC: audio-graph: count DAI / link numbers as in order

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

audio-graph checks DT links 2 times. 1st is for counting DAIs / links
to allocating memory, 2nd is for detecting DAIs.
To detecting DAIs as CPU-dummy -> dummy-Codec order when DPCM case,
it uses loops 2 times at 2nd DT link check.
But it doesn't do it at 1st DT link check.

	for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
		/*
		 * Detect all CPU first, and Detect all Codec 2n
		 *
		 * 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(...);
		...
	}

To prepare supporting multi-CPU/Codec, and code cleanup,
this patch use same loop for 1st DT link check, too.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/generic/audio-graph-card.c | 29 ++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index 8c5cdcdc8713..3a967c520b01 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -617,6 +617,10 @@ static int graph_count_noml(struct asoc_simple_priv *priv,
 {
 	struct device *dev = simple_priv_to_dev(priv);
 
+	/* Do it only CPU turn */
+	if (!li->cpu)
+		return 0;
+
 	li->link += 1; /* 1xCPU-Codec */
 	li->dais += 2; /* 1xCPU + 1xCodec */
 
@@ -633,10 +637,22 @@ static int graph_count_dpcm(struct asoc_simple_priv *priv,
 {
 	struct device *dev = simple_priv_to_dev(priv);
 
-	li->link++; /* 1xCPU-dummy */
-	li->dais++; /* 1xCPU */
+	/*
+	 * 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;
 
-	if (!dup_codec && codec_ep) {
+	if (li->cpu) {
+		li->link++; /* 1xCPU-dummy */
+		li->dais++; /* 1xCPU */
+	} else if (!dup_codec && codec_ep) {
 		li->link++; /* 1xdummy-Codec */
 		li->conf++; /* 1xdummy-Codec */
 		li->dais++; /* 1xCodec */
@@ -698,9 +714,10 @@ static void graph_get_dais_count(struct asoc_simple_priv *priv,
 	 *	=> 4 DAIs  = 2xCPU + 2xCodec
 	 *	=> 1 ccnf  = 1xdummy-Codec
 	 */
-	graph_for_each_link(priv, li,
-			    graph_count_noml,
-			    graph_count_dpcm);
+	for (li->cpu = 1; li->cpu >= 0; li->cpu--)
+		graph_for_each_link(priv, li,
+				    graph_count_noml,
+				    graph_count_dpcm);
 	dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
 		li->link, li->dais, li->conf);
 }
-- 
2.25.1