--- zzzz-none-000/linux-3.10.107/sound/pci/oxygen/oxygen_regs.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/pci/oxygen/oxygen_regs.h	2021-02-04 17:41:59.000000000 +0000
@@ -318,6 +318,7 @@
 #define  OXYGEN_PLAY_MUTE23		0x0002
 #define  OXYGEN_PLAY_MUTE45		0x0004
 #define  OXYGEN_PLAY_MUTE67		0x0008
+#define  OXYGEN_PLAY_MUTE_MASK		0x000f
 #define  OXYGEN_PLAY_MULTICH_MASK	0x0010
 #define  OXYGEN_PLAY_MULTICH_I2S_DAC	0x0000
 #define  OXYGEN_PLAY_MULTICH_AC97	0x0010