diff --git a/arch/arm/mach-rk29/board-rk29sdk.c b/arch/arm/mach-rk29/board-rk29sdk.c
index d3ed7b226f1b..f498c4c9be37 100755
--- a/arch/arm/mach-rk29/board-rk29sdk.c
+++ b/arch/arm/mach-rk29/board-rk29sdk.c
@@ -677,7 +677,7 @@ extern struct platform_device rk29_device_camera;
 #define PWM_MUX_NAME      GPIO1B5_PWM0_NAME
 #define PWM_MUX_MODE      GPIO1L_PWM0
 #define PWM_MUX_MODE_GPIO GPIO1L_GPIO1B5
-#define PWM_EFFECT_VALUE  0
+#define PWM_EFFECT_VALUE  1
 
 //#define LCD_DISP_ON_PIN