ALSA: usb-audio: add implicit fb quirk for Behringer UFX1204

Add quirk to ensure a sync endpoint is properly configured. This patch is a fix for same symptoms on Behringer UFX1204 as patch from Albertto Aquirre on Dec 8 2016 for Axe-Fx II. Signed-off-by: Lassi Ylikojola <[email protected]> Cc: <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
josf · Feb 12, 2018 · 5e35dc0 · 5e35dc0
1 parent 1f8ade9
commit 5e35dc0
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
@@ -352,6 +352,15 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		ep = 0x86;
 		iface = usb_ifnum_to_if(dev, 2);
 
+		if (!iface || iface->num_altsetting == 0)
+			return -EINVAL;
+
+		alts = &iface->altsetting[1];
+		goto add_sync_ep;
+	case USB_ID(0x1397, 0x0002):
+		ep = 0x81;
+		iface = usb_ifnum_to_if(dev, 1);
+
 		if (!iface || iface->num_altsetting == 0)
 			return -EINVAL;