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| author | Jorge Sanjuan <jorge.sanjuan@codethink.co.uk> | 2018-07-31 15:28:44 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-07-31 16:01:36 +0300 |
| commit | 3f59aa11c6776da8d0f9f50c741ef02bfc4a8766 (patch) | |
| tree | 525006d8010aedab1c17179c37dc2c379aacb22d /sound/usb/card.c | |
| parent | 7edf3b5e6a4544b42d3572a7058f8ffe96349ee8 (diff) | |
| download | linux-3f59aa11c6776da8d0f9f50c741ef02bfc4a8766.tar.xz | |
ALSA: usb-audio: Add UAC3 Power Domains to suspend/resume
Set the UAC3 Power Domain state for an Audio Streaming interface
to D2 state before suspending the device (usb_driver callback).
This lets the device know there is no intention to use any of the
Units in the Audio Function and that the host is not going to
even listen for wake-up events (interrupts) on the units.
When the usb_driver gets resumed, the state D0 (fully powered) will
be set. This ties up the UAC3 Power Domains to the runtime PM.
Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/card.c')
| -rw-r--r-- | sound/usb/card.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c index a1ed798a1c6b..2bfe4e80a6b9 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -809,6 +809,7 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) if (!chip->num_suspended_intf++) { list_for_each_entry(as, &chip->pcm_list, list) { snd_pcm_suspend_all(as->pcm); + snd_usb_pcm_suspend(as); as->substream[0].need_setup_ep = as->substream[1].need_setup_ep = true; } @@ -824,6 +825,7 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) { struct snd_usb_audio *chip = usb_get_intfdata(intf); + struct snd_usb_stream *as; struct usb_mixer_interface *mixer; struct list_head *p; int err = 0; @@ -834,6 +836,13 @@ static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) return 0; atomic_inc(&chip->active); /* avoid autopm */ + + list_for_each_entry(as, &chip->pcm_list, list) { + err = snd_usb_pcm_resume(as); + if (err < 0) + goto err_out; + } + /* * ALSA leaves material resumption to user space * we just notify and restart the mixers |