Input: xpad - fix PowerA EnWired Controller guide button

This commit explicitly disables the audio interface the same way the official
driver does. This is needed for some controllers, such as the PowerA Enhanced
Wired Controller for Series X|S (0x20d6:0x200e) to report the guide button.

Signed-off-by: Vicki Pfau <vi@endrift.com>
Link: https://lore.kernel.org/r/20230411031650.960322-3-vi@endrift.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: endrift

drivers/input/joystick/xpad.c

@@ -1396,6 +1396,21 @@ static int xpad_start_xbox_one(struct usb_xpad *xpad)
 	unsigned long flags;
 	int retval;
 
+	if (usb_ifnum_to_if(xpad->udev, GIP_WIRED_INTF_AUDIO)) {
+		/*
+		 * Explicitly disable the audio interface. This is needed
+		 * for some controllers, such as the PowerA Enhanced Wired
+		 * Controller for Series X|S (0x20d6:0x200e) to report the
+		 * guide button.
+		 */
+		retval = usb_set_interface(xpad->udev,
+					   GIP_WIRED_INTF_AUDIO, 0);
+		if (retval)
+			dev_warn(&xpad->dev->dev,
+				 "unable to disable audio interface: %d\n",
+				 retval);
+	}
+
 	spin_lock_irqsave(&xpad->odata_lock, flags);
 
 	/*