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Commit ca10a7eb authored by Eldad Zack's avatar Eldad Zack Committed by Takashi Iwai
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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: default avatarEldad Zack <eldad@fogrefinery.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 09d8e3a7

sound/usb/pcm.c

+13 −0
Original line number Diff line number Diff line
@@ -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) {