[PATCH v2 04/21] ASoC: soc-dai: add snd_soc_dai_active()

[Kuninori Morimoto]

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

Current snd_soc_dai_action() is updating
dai->stream_active for Playback/Capture (A),
dai->active        for DAI (B)

	void snd_soc_dai_action(struct snd_soc_dai *dai,
				int stream, int action)
	{
(A)		dai->stream_active[stream]	+= action;
(B)		dai->active			+= action;
		dai->component->active		+= action;
	}

But, these are very verbose, because we can calculate
DAI active from stream_active.

This patch adds snd_soc_dai_active() which calculate
DAI active from DAI stream_active.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
v1 -> v2
	- function name "xxx_activity" -> "xxx_active"

 include/sound/soc-dai.h |  1 +
 sound/soc/soc-dai.c     | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 019c222a0b0d..e651c62636ab 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -165,6 +165,7 @@ void snd_soc_dai_action(struct snd_soc_dai *dai,
 			int stream, int action);
 #define snd_soc_dai_activate(dai, stream)   snd_soc_dai_action(dai, stream,  1)
 #define snd_soc_dai_deactivate(dai, stream) snd_soc_dai_action(dai, stream, -1)
+int snd_soc_dai_active(struct snd_soc_dai *dai);
 
 int snd_soc_pcm_dai_probe(struct snd_soc_pcm_runtime *rtd, int order);
 int snd_soc_pcm_dai_remove(struct snd_soc_pcm_runtime *rtd, int order);
diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c
index 3208f244c1b8..de2981fa5372 100644
--- a/sound/soc/soc-dai.c
+++ b/sound/soc/soc-dai.c
@@ -397,6 +397,18 @@ void snd_soc_dai_action(struct snd_soc_dai *dai,
 }
 EXPORT_SYMBOL_GPL(snd_soc_dai_action);
 
+int snd_soc_dai_active(struct snd_soc_dai *dai)
+{
+	int stream, active;
+
+	active = 0;
+	for_each_pcm_streams(stream)
+		active += dai->stream_active[stream];
+
+	return active;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_active);
+
 int snd_soc_pcm_dai_probe(struct snd_soc_pcm_runtime *rtd, int order)
 {
 	struct snd_soc_dai *dai;
-- 
2.17.1