[PATCH v3 04/21] ASoC: soc-dai: add snd_soc_dai_active()

[Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>]

From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>

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@xxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
---
 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 800d7aa8523e..2c74c41f9447 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -173,6 +173,7 @@ static inline void snd_soc_dai_deactivate(struct snd_soc_dai *dai,
 {
 	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