TCB13

I finally managed to get this work. Things I was doing wrong:
Not using the OPi.GPIO replacement library - others aren't compatible with the NanoPi M4; DIN LCD pin was connected to the SBC RXD instead of TXD; Passed wrong pin numbers to the libraries (should be the real physical pins numers); Mistaking SPI port with device... Here the full guide on how to it properly. Start by installing:
 
apt-get install python3 python3-pip python3-pil libjpeg-dev zlib1g-dev libfreetype6-dev liblcms2-dev libopenjp2-7 libtiff5 -y pip3 install luma.oled apt-get remove python3-rpi.gpio rpi.gpio-common pip3 install --upgrade OPi.GPIO  
Wire up your LCD as:
 
MISO > GPIO1_B0 > SPI1_TXD > 19 > LCD DIN | Blue SCK > GPIO1_B1 > SPI1_CLK > 23 > LCD CLK | Yellow CS > GPIO1_B2 > SPI1_CSn0 > 24 > LCD CS | Orange RST > GPIO1_A1(3V) > M4 Pin 11 > LCD RST Pin | White DC > GPIO1_A3(3V) > M4 Pin 13 > LCD DC Pin | Green  
Download an run an example:
 
git clone https://github.com/rm-hull/luma.examples.git python3 luma.examples/examplebounce.py --display=ssd1351 \ --interface=spi \ --width=128 --height=128 \ --spi-bus-speed=50000000 \ --spi-device=0 \ --spi-port=1 \ --gpio-reset=11 \ --gpio-data-command=13 \ --gpio OPi.GPIO \ --gpio-mode nanopi.m4.BOARD  
And you should get something like this:
 

 
It seems to be able to drive the display up to around 45fps without noises like I've experienced before in an Arduino.
 
Enjoy.