ALSA: usb-audio: FT C400 sync playback EP to capture EP
The playback endpoint uses implicit feedback mode, similar
to the M-Audio FTU. Like with the FTU, we need to associate
the sync pipe ourselves.
Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index f488a49..769821c 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -362,6 +362,19 @@
attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
switch (subs->stream->chip->usb_id) {
+ case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+ if (is_playback) {
+ implicit_fb = 1;
+ ep = 0x81;
+ iface = usb_ifnum_to_if(dev, 3);
+
+ if (!iface || iface->num_altsetting == 0)
+ return -EINVAL;
+
+ alts = &iface->altsetting[1];
+ goto add_sync_ep;
+ }
+ break;
case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
case USB_ID(0x0763, 0x2081):
if (is_playback) {