[PATCH 08/11] usb: gadget: u_audio: Adding suspend call
From: Pavel Hofman <hidden>
Date: 2021-12-20 08:26:02
Subsystem:
the rest, usb subsystem · Maintainers:
Linus Torvalds, Greg Kroah-Hartman
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 <redacted> --- 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