framebuffer console on DM814x EVM

Hi,

I'm trying to init a framebuffer console on DM814x EVM,

modify kernel config as below

Device Drivers  --->
	Graphics support  --->
		Console display driver support  --->
			<*> Framebuffer Console support

but still nothing on display.

Even I compile as a module, fbcon, and insert after ti81xxfb,

still not work out.

Is anyone know how to enable framebuffer console??

Thank you in advance.