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-rw-r--r--sound/core/pcm.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 01b9d62eef14..ca1ea3cf9350 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -683,6 +683,31 @@ static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substrea
static const struct attribute_group *pcm_dev_attr_groups[];
+/*
+ * PM callbacks: we need to deal only with suspend here, as the resume is
+ * triggered either from user-space or the driver's resume callback
+ */
+#ifdef CONFIG_PM_SLEEP
+static int do_pcm_suspend(struct device *dev)
+{
+ struct snd_pcm_str *pstr = container_of(dev, struct snd_pcm_str, dev);
+
+ if (!pstr->pcm->no_device_suspend)
+ snd_pcm_suspend_all(pstr->pcm);
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops pcm_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(do_pcm_suspend, NULL)
+};
+
+/* device type for PCM -- basically only for passing PM callbacks */
+static const struct device_type pcm_dev_type = {
+ .name = "pcm",
+ .pm = &pcm_dev_pm_ops,
+};
+
/**
* snd_pcm_new_stream - create a new PCM stream
* @pcm: the pcm instance
@@ -713,6 +738,7 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
snd_device_initialize(&pstr->dev, pcm->card);
pstr->dev.groups = pcm_dev_attr_groups;
+ pstr->dev.type = &pcm_dev_type;
dev_set_name(&pstr->dev, "pcmC%iD%i%c", pcm->card->number, pcm->device,
stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c');