diff --git a/arch/arm/mach-rk2928/board-rk2928-sdk.c b/arch/arm/mach-rk2928/board-rk2928-sdk.c
index b899dba0013d..656791a69728 100755
--- a/arch/arm/mach-rk2928/board-rk2928-sdk.c
+++ b/arch/arm/mach-rk2928/board-rk2928-sdk.c
@@ -217,6 +217,7 @@ static int rk_fb_io_disable(void)
 	}
 	#endif
         gpio_set_value(LCD_EN, !LCD_EN_VALUE);
+	msleep(50);
 	return 0;
 }
 static int rk_fb_io_enable(void)
@@ -234,6 +235,7 @@ static int rk_fb_io_enable(void)
 	#endif
 
         gpio_set_value(LCD_EN, LCD_EN_VALUE);
+	msleep(50);
 	return 0;
 }