1 files changed, 17 insertions, 0 deletions

diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
index e5d8a6adf38f..88eb63a636eb 100644
--- a/sound/usb/endpoint.h
+++ b/sound/usb/endpoint.h
@@ -1,4 +1,21 @@
 #ifndef __USBAUDIO_ENDPOINT_H
 #define __USBAUDIO_ENDPOINT_H
 
+void snd_usb_init_substream(struct snd_usb_stream *as,
+                            int stream,
+                            struct audioformat *fp);
+
+int snd_usb_init_substream_urbs(struct snd_usb_substream *subs,
+                                unsigned int period_bytes,
+                                unsigned int rate,
+                                unsigned int frame_bits);
+
+void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force);
+
+int snd_usb_substream_prepare(struct snd_usb_substream *subs,
+                              struct snd_pcm_runtime *runtime);
+
+int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd);
+int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd);
+
 #endif /* __USBAUDIO_ENDPOINT_H */