RPI 7 inch offical display

Hello

i try rock pi 4 se and debian bullseye image 4.4 kernel on rpi official touchscreen.

i enable boot/hw_intfc.conf file

intfc:dtoverlay=raspberrypi-7-inch-lcd

after reboot then device not boot.

blue led blink two in second.

i want to use rpi offical 7inch touchscreens.

Which image can I try?
Or what is the cause of the problem?_
thanks