you should configure adv7180 in the
device drivers > Multimedia support > video capture adapters > [M]MXC Camera/V4L2 PRP Features support > [M] Analog Device adv7180 TV Decoder Input support
then load the camera module and test the camera using "./mxc_v4l2_tvin.out -ow 480 -oh 480"
for output to hdmi, you should set this in the uboot command.
but now, could you tell me what's your staus? or did you get any error log? you couldn't capture from adv7180 or couldn't output to hdmi? what's your issue?