ALSA: usb-audio - Quirk for Serato phono

Ignore errors (wrong usb interface data) found when using the serato
scratch live box with alsa

Thus the alsa controls can be accessed (beware: they don't work though -
but at least it's one ugly error message less)

Signed-off-by: Andreas Bergmeier <lcid-fire@gmx.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 21 insertions, 0 deletions

diff --git a/sound/usb/usbmixer_maps.c b/sound/usb/usbmixer_maps.c
index f41214f3ad6b..3e5d66cf1f5a 100644
--- a/sound/usb/usbmixer_maps.c
+++ b/sound/usb/usbmixer_maps.c
@@ -261,6 +261,22 @@ static struct usbmix_name_map aureon_51_2_map[] = {
         {} /* terminator */
 };
 
+static struct usbmix_name_map scratch_live_map[] = {
+        /* 1: IT Line 1 (USB streaming) */
+        /* 2: OT Line 1 (Speaker) */
+        /* 3: IT Line 1 (Line connector) */
+        { 4, "Line 1 In" }, /* FU */
+        /* 5: OT Line 1 (USB streaming) */
+        /* 6: IT Line 2 (USB streaming) */
+        /* 7: OT Line 2 (Speaker) */
+        /* 8: IT Line 2 (Line connector) */
+        { 9, "Line 2 In" }, /* FU */
+        /* 10: OT Line 2 (USB streaming) */
+        /* 11: IT Mic (Line connector) */
+        /* 12: OT Mic (USB streaming) */
+        { 0 } /* terminator */
+};
+
 /*
  * Control map entries
  */
@@ -316,6 +332,11 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
                 .id = USB_ID(0x0ccd, 0x0028),
                 .map = aureon_51_2_map,
         },
+        {
+                .id = USB_ID(0x13e5, 0x0001),
+                .map = scratch_live_map,
+                .ignore_ctl_error = 1,
+        },
         { 0 } /* terminator */
 };