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authorEldad Zack <eldad@fogrefinery.com>2012-11-29 02:55:41 +0400
committerTakashi Iwai <tiwai@suse.de>2012-11-29 11:45:18 +0400
commitca10a7ebdff1c862ca1ef1d7bd2c6810e3c87e17 (patch)
treed06e8e7b7d93e0af9253b23c0bc450acce146552 /sound/usb/pcm.c
parent09d8e3a71d2bdde11b258a62043cb784891e6ad3 (diff)
downloadlinux-ca10a7ebdff1c862ca1ef1d7bd2c6810e3c87e17.tar.xz
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>
Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index f488a493a98e..769821c30031 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -362,6 +362,19 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
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) {