diff --git a/drivers/video/rockchip/Kconfig b/drivers/video/rockchip/Kconfig
index cfd774e..5215a71 100644
--- a/drivers/video/rockchip/Kconfig
+++ b/drivers/video/rockchip/Kconfig
@@ -22,7 +22,7 @@
 config VIDEO_ROCKCHIP_MAX_XRES
         int "Maximum horizontal resolution (for memory allocation purposes)"
 	depends on VIDEO_ROCKCHIP
-	default 3480 if ROCKCHIP_RK3399 && DISPLAY_ROCKCHIP_HDMI
+	default 3840 if ROCKCHIP_RK3399 && DISPLAY_ROCKCHIP_HDMI
 	default 1920
 	help
 	  The maximum horizontal resolution to support for the framebuffer.