Download at rgb-pi.com
To use the cable in Retropie, Raspbian or any other system you can insert this lines in config.txt
Warning, this mode only support single resolution, We only support multiple resolutions in RGB-Pi OS
dtparam=audio=on
dtoverlay=pwm-2chan,pin=18,func=2,pin2=19,func2=2
dtoverlay=rgb-pi
enable_dpi_lcd=1
display_default_lcd=1
dpi_output_format=6
dpi_group=2
dpi_mode=87
hdmi_timings=320 1 16 30 34 240 1 2 3 22 0 0 0 60 0 6400000 1
And add the file /overlays/rgb-pi.dtbo from the repo .dtbo if your OS is 4.1 or .dtb for 4.0