[ALSA] soc - Add device level DAPM event

Added a device level dapm event so that both the machine and codec are informed
when dapm events occur.
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

include/sound/soc-dapm.h

@@ -199,6 +199,7 @@ void snd_soc_dapm_free(struct snd_soc_device *socdev);
 /* dapm events */
 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec, char *stream,
 	int event);
+int snd_soc_dapm_device_event(struct snd_soc_device *socdev, int event);
 
 /* dapm sys fs - used by the core */
 int snd_soc_dapm_sys_add(struct device *dev);

include/sound/soc.h

@@ -425,6 +425,9 @@ struct snd_soc_machine {
 	int (*resume_pre)(struct platform_device *pdev);
 	int (*resume_post)(struct platform_device *pdev);
 
+	/* callbacks */
+	int (*dapm_event)(struct snd_soc_machine *, int event);
+
 	/* CPU <--> Codec DAI links  */
 	struct snd_soc_dai_link *dai_link;
 	int num_links;

sound/soc/soc-core.c

@@ -288,15 +288,16 @@ static void close_delayed_work(struct work_struct *work)
 		if (codec_dai->pop_wait == 1) {
 
 			codec_dai->pop_wait = 0;
-			snd_soc_dapm_stream_event(codec, codec_dai->playback.stream_name,
+			snd_soc_dapm_stream_event(codec,
+				codec_dai->playback.stream_name,
 				SND_SOC_DAPM_STREAM_STOP);
 
 			/* power down the codec power domain if no longer active */
 			if (codec->active == 0) {
 				dbg("pop wq D3 %s %s\n", codec->name,
 					codec_dai->playback.stream_name);
-		 		if (codec->dapm_event)
-					codec->dapm_event(codec, SNDRV_CTL_POWER_D3hot);
+				snd_soc_dapm_device_event(socdev,
+					SNDRV_CTL_POWER_D3hot);
 			}
 		}
 	}
@@ -352,12 +353,12 @@ static int soc_codec_close(struct snd_pcm_substream *substream)
 	} else {
 		/* capture streams can be powered down now */
 		snd_soc_dapm_stream_event(codec,
-			codec_dai->capture.stream_name, SND_SOC_DAPM_STREAM_STOP);
+			codec_dai->capture.stream_name,
+			SND_SOC_DAPM_STREAM_STOP);
 
-		if (codec->active == 0 && codec_dai->pop_wait == 0){
-			if (codec->dapm_event)
-				codec->dapm_event(codec, SNDRV_CTL_POWER_D3hot);
-		}
+		if (codec->active == 0 && codec_dai->pop_wait == 0)
+			snd_soc_dapm_device_event(socdev,
+						SNDRV_CTL_POWER_D3hot);
 	}
 
 	mutex_unlock(&pcm_mutex);
@@ -432,8 +433,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 		/* no delayed work - do we need to power up codec */
 		if (codec->dapm_state != SNDRV_CTL_POWER_D0) {
 
-			if (codec->dapm_event)
-				codec->dapm_event(codec, SNDRV_CTL_POWER_D1);
+			snd_soc_dapm_device_event(socdev,  SNDRV_CTL_POWER_D1);
 
 			if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 				snd_soc_dapm_stream_event(codec,
@@ -444,8 +444,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 					codec_dai->capture.stream_name,
 					SND_SOC_DAPM_STREAM_START);
 
-			if (codec->dapm_event)
-				codec->dapm_event(codec, SNDRV_CTL_POWER_D0);
+			snd_soc_dapm_device_event(socdev, SNDRV_CTL_POWER_D0);
 			if (codec_dai->dai_ops.digital_mute)
 				codec_dai->dai_ops.digital_mute(codec_dai, 0);
 

sound/soc/soc-dapm.c

@@ -1278,6 +1278,29 @@ int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
 
+/**
+ * snd_soc_dapm_device_event - send a device event to the dapm core
+ * @socdev: audio device
+ * @event: device event
+ *
+ * Sends a device event to the dapm core. The core then makes any
+ * necessary machine or codec power changes..
+ *
+ * Returns 0 for success else error.
+ */
+int snd_soc_dapm_device_event(struct snd_soc_device *socdev, int event)
+{
+	struct snd_soc_codec *codec = socdev->codec;
+	struct snd_soc_machine *machine = socdev->machine;
+
+	if (machine->dapm_event)
+				machine->dapm_event(machine, event);
+	if (codec->dapm_event)
+				codec->dapm_event(codec, event);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_device_event);
+
 /**
  * snd_soc_dapm_set_endpoint - set audio endpoint status
  * @codec: audio codec