Display configuration tutorial

Official image version：
retropie-buster-4.7-xxxx.img

Board version：Raspberry Ri Zero/Zero 2/3B/4B/CM4

Firstly , you need update your retropie os . Make sure all software updated ok, No errors.
If have any errors, You need try again or check your internet.
Some errors will make display not work
sudo apt-get update
sudo apt-get upgrade -y

Download lcd154.dtbo to your pi
sudo cp lcd154.dtbo /boot/overlays/

sudo nano /boot/config.txt
Add the following code

dtparam=spi=on

dtoverlay=lcd154:rotate=270

hdmi_force_hotplug=1

max_usb_current=1

hdmi_group=2

hdmi_mode=1

hdmi_mode=87

hdmi_cvt 480 480 60 6 0 0 0

hdmi_drive=2

display_rotate=0
dtoverlay=dwc2,dr_mode=host
avoid_warnings=1

Download rpi-fbcp.zip to your pi
unzip rpi-fbcp.zip

cd rpi-fbcp/build/

sudo install fbcp /usr/local/bin/fbcp

sudo nano /etc/rc.local
Add the following code
sleep 7

fbcp &
like the following picture

To reboot with using this command sudo reboot

Then the LCD will display ok

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