1 files changed, 14 insertions, 0 deletions

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index d2aa45a8d895..a5941f80fc5b 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1146,6 +1146,20 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
         if ((le16_to_cpu(dev->descriptor.idVendor) == 0x23ba) &&
             (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
                 mdelay(20);
+
+        /* Marantz/Denon devices with USB DAC functionality need a delay
+         * after each class compliant request
+         */
+        if ((le16_to_cpu(dev->descriptor.idVendor) == 0x154e) &&
+            (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) {
+
+                switch (le16_to_cpu(dev->descriptor.idProduct)) {
+                case 0x3005: /* Marantz HD-DAC1 */
+                case 0x3006: /* Marantz SA-14S1 */
+                        mdelay(20);
+                        break;
+                }
+        }
 }
 
 /*