diff mbox series

[v2,08/11] usb: gadget: u_audio: Adding suspend call

Message ID 20211220211130.88590-9-pavel.hofman@ivitera.com
State Superseded
Headers show
Series usb: gadget: audio: Multiple rates, dyn. bInterval | expand

Commit Message

Pavel Hofman Dec. 20, 2021, 9:11 p.m. UTC 
Adding exported method u_audio_suspend which stops capture and playback
PCM streams and notifies about zero sample rates. The method does not
free any resources.

Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
---
 drivers/usb/gadget/function/u_audio.c | 11 +++++++++++
 drivers/usb/gadget/function/u_audio.h |  2 ++
 2 files changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c
index 9dbce51c2eb7..58e18952953b 100644
--- a/drivers/usb/gadget/function/u_audio.c
+++ b/drivers/usb/gadget/function/u_audio.c
@@ -734,6 +734,17 @@  void u_audio_stop_playback(struct g_audio *audio_dev)
 }
 EXPORT_SYMBOL_GPL(u_audio_stop_playback);
 
+void u_audio_suspend(struct g_audio *audio_dev)
+{
+	struct snd_uac_chip *uac = audio_dev->uac;
+
+	stop_substream(&uac->p_prm);
+	stop_substream(&uac->c_prm);
+	set_reported_srate(&uac->p_prm, 0);
+	set_reported_srate(&uac->c_prm, 0);
+}
+EXPORT_SYMBOL_GPL(u_audio_suspend);
+
 int u_audio_get_volume(struct g_audio *audio_dev, int playback, s16 *val)
 {
 	struct snd_uac_chip *uac = audio_dev->uac;
diff --git a/drivers/usb/gadget/function/u_audio.h b/drivers/usb/gadget/function/u_audio.h
index 76b5b8169444..74e7519d9497 100644
--- a/drivers/usb/gadget/function/u_audio.h
+++ b/drivers/usb/gadget/function/u_audio.h
@@ -128,4 +128,6 @@  int u_audio_set_volume(struct g_audio *g_audio, int playback, s16 val);
 int u_audio_get_mute(struct g_audio *g_audio, int playback, int *val);
 int u_audio_set_mute(struct g_audio *g_audio, int playback, int val);
 
+void u_audio_suspend(struct g_audio *g_audio);
+
 #endif /* __U_AUDIO_H */