[alsa-devel] [PATCH 2/2] ASoC: component: Add sync_stop PCM ops

[Takashi Iwai]

Add the support of the new PCM sync_stop ops in ASoC component.
It's optional and can be NULL unless you need the sync operation.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 include/sound/soc-component.h |  3 +++
 sound/soc/soc-component.c     | 19 +++++++++++++++++++
 sound/soc/soc-pcm.c           |  2 ++
 3 files changed, 24 insertions(+)

diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
index 6aa3ecb7b6d3..d9dc8bcc96d0 100644
--- a/include/sound/soc-component.h
+++ b/include/sound/soc-component.h
@@ -88,6 +88,8 @@ struct snd_soc_component_driver {
 		       struct snd_pcm_substream *substream);
 	int (*trigger)(struct snd_soc_component *component,
 		       struct snd_pcm_substream *substream, int cmd);
+	int (*sync_stop)(struct snd_soc_component *component,
+			 struct snd_pcm_substream *substream);
 	snd_pcm_uframes_t (*pointer)(struct snd_soc_component *component,
 				     struct snd_pcm_substream *substream);
 	int (*get_time_info)(struct snd_soc_component *component,
@@ -405,6 +407,7 @@ int snd_soc_component_of_xlate_dai_name(struct snd_soc_component *component,
 int snd_soc_pcm_component_pointer(struct snd_pcm_substream *substream);
 int snd_soc_pcm_component_ioctl(struct snd_pcm_substream *substream,
 				unsigned int cmd, void *arg);
+int snd_soc_pcm_component_sync_stop(struct snd_pcm_substream *substream);
 int snd_soc_pcm_component_copy_user(struct snd_pcm_substream *substream,
 				    int channel, unsigned long pos,
 				    void __user *buf, unsigned long bytes);
diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
index 98ef0666add2..58c1320a3521 100644
--- a/sound/soc/soc-component.c
+++ b/sound/soc/soc-component.c
@@ -444,6 +444,25 @@ int snd_soc_pcm_component_ioctl(struct snd_pcm_substream *substream,
 	return snd_pcm_lib_ioctl(substream, cmd, arg);
 }
 
+int snd_soc_pcm_component_sync_stop(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	int ret;
+
+	for_each_rtd_components(rtd, rtdcom, component) {
+		if (component->driver->ioctl) {
+			ret = component->driver->sync_stop(component,
+							   substream);
+			if (ret < 0)
+				return ret;
+		}
+	}
+
+	return 0;
+}
+
 int snd_soc_pcm_component_copy_user(struct snd_pcm_substream *substream,
 				    int channel, unsigned long pos,
 				    void __user *buf, unsigned long bytes)
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 4dd13c9249ab..4457ac374a0e 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -3020,6 +3020,8 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 
 		if (drv->ioctl)
 			rtd->ops.ioctl		= snd_soc_pcm_component_ioctl;
+		if (drv->sync_stop)
+			rtd->ops.sync_stop	= snd_soc_pcm_component_sync_stop;
 		if (drv->copy_user)
 			rtd->ops.copy_user	= snd_soc_pcm_component_copy_user;
 		if (drv->page)
-- 
2.16.4