diff --git a/arch/arm/plat-samsung/include/plat/fb.h b/arch/arm/plat-samsung/include/plat/fb.h
index 4439ff3..9f24304 100644
--- a/arch/arm/plat-samsung/include/plat/fb.h
+++ b/arch/arm/plat-samsung/include/plat/fb.h
@@ -37,6 +37,7 @@ struct s3c_fb_pd_win {
  *		device.
  * @shadow_ch_enable: it should be enabled to enable window layer on s5pc110.
  * 		      enable is 1 and disable is 0.
+ * @default_win: default window layer number to be used for UI layer.
  * @vidcon0: The base vidcon0 values to control the panel data format.
  * @vidcon1: The base vidcon1 values to control the panel data output.
  * @win: The setup data for each hardware window, or NULL for unused.
@@ -53,6 +54,7 @@ struct s3c_fb_platdata {
 
 	struct s3c_fb_pd_win	*win[S3C_FB_MAX_WIN];
 	u32			shadow_ch_enable;
+	u32			default_win;
 
 	u32			 vidcon0;
 	u32			 vidcon1;
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index 340267e..b1d7252 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -302,7 +302,7 @@ static int s3c_fb_set_par(struct fb_info *info)
 
 	/* use window 0 as the basis for the lcd output timings */
 
-	if (win_no == 0) {
+	if (win_no == sfb->pdata->default_win) {
 		clkdiv = s3c_fb_calc_pixclk(sfb, var->pixclock);
 
 		data = sfb->pdata->vidcon0;
@@ -643,7 +643,7 @@ static int s3c_fb_blank(int blank_mode, struct fb_info *info)
 	/* we're stuck with this until we can do something about overriding
 	 * the power control using the blanking event for a single fb.
 	 */
-	if (index == 0)
+	if (index == sfb->pdata->default_win)
 		s3c_fb_enable(sfb, blank_mode != FB_BLANK_POWERDOWN ? 1 : 0);
 
 	return 0;