ASoC: soc-compress: Initialise delayed work to power down audio

Delayed work was scheduled but not initialised, this patch adds the
actual work and initialises it.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Tested-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index c48db6391ad5..3ea79564a993 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -75,6 +75,34 @@ out:
         return ret;
 }
 
+/*
+ * Power down the audio subsystem pmdown_time msecs after close is called.
+ * This is to ensure there are no pops or clicks in between any music tracks
+ * due to DAPM power cycling.
+ */
+static void close_delayed_work(struct work_struct *work)
+{
+        struct snd_soc_pcm_runtime *rtd =
+                        container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
+        struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+        mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+        dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
+                 codec_dai->driver->playback.stream_name,
+                 codec_dai->playback_active ? "active" : "inactive",
+                 rtd->pop_wait ? "yes" : "no");
+
+        /* are we waiting on this codec DAI stream */
+        if (rtd->pop_wait == 1) {
+                rtd->pop_wait = 0;
+                snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
+                                          SND_SOC_DAPM_STREAM_STOP);
+        }
+
+        mutex_unlock(&rtd->pcm_mutex);
+}
+
 static int soc_compr_free(struct snd_compr_stream *cstream)
 {
         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
@@ -317,6 +345,9 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
                 return ret;
         }
 
+        /* DAPM dai link stream work */
+        INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
+
         rtd->compr = compr;
         compr->private_data = rtd;