The CoM Express connector specification defines possible pins for VGA and other Video outputs like CVBS, Component video and S-video.
On the Robin module those signals are available, on Woodpecker not. If on Woodpecker VGA is needed, a LVDS to VGA adaptor or (easier) a SDVO to VGA chip must be implemented on the baseboard.
For the VGA and other Video outputs like CVBS, Component video and S-video 150R load resistors to GND are needed on a carrierboard. Otherwise the CH7022 doesn't output the signals. The following signals need the 150R resistor if VGA output is used:
HSYNC, VSYNC and I2C signals don't need the 150R resistor.
The following signals need the 150R resistor if the according output is used:
