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@xxxxxxxxxxx>
---
drivers/usb/gadget/function/u_audio.c | 11 +++++++++++
drivers/usb/gadget/function/u_audio.h | 2 ++
2 files changed, 13 insertions(+)
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 */
--
2.25.1
