diff --git a/[refs] b/[refs]
index 4e392948f754..c4265f75679e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ffdfe2d50d47b26320bbfbbad7c0d03b105ec23a
+refs/heads/master: d2b0812d4f01ea25a52bd30db90134a2cee1f78d
diff --git a/trunk/arch/arm/mach-shmobile/board-ap4evb.c b/trunk/arch/arm/mach-shmobile/board-ap4evb.c
index 99ef190d0909..70d287c28a62 100644
--- a/trunk/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/trunk/arch/arm/mach-shmobile/board-ap4evb.c
@@ -143,6 +143,10 @@
  *
  * SW41	:  ON : SH-Mobile AP4 Audio Mode
  *	: OFF : Bluetooth Audio Mode
+ *
+ * it needs amixer settings for playing
+ *
+ * amixer set "Headphone Enable" on
  */
 
 /*