media-ctl -V "'ipu1_csi0':0 [fmt:AYUV32/720x480]"
This is the reason. The adv7180 is only allowing to configure alternate field mode, and thus it reports the field height on the mbus, not the full frame height. Imx deals with alternate field mode by capturing a full frame, so the CSI entity sets the output pad height to double the height.