Retroflag provides 2 device tree binary overlay files and a config.txt. They are necessary for getting the video and audio to work in the GPi case.
I looked into the provided dtbo files and managed to recreate source files for them.
- Run
compile-dts.sh
to get the.dtbo
files - Place the
.dtbo
files in/boot/overlays/
- Place the
config.txt
file in/boot/
after backing up the stock config.txt
- Restore the stock
config.txt
from backup