This is a mipi screen driver for raspberry pi and it has been tested on Raspberry pi 3b+ and Raspberry pi 4b. It uses 2 lanes of MIPI dsi socket on raspberry, and the SCL pin (GPIO45) is served as screen reset, SDA pin (GPIO44) is served as backlight control.
If you want to build your own screen driver, follow instructions will help.
First, download raspberry pi official image, in this case the image is 64-bit bullseye version. Burn the image into a TF card and boot your raspberry pi.
After your raspberry booted, install raspberrypi-kernel-headers.
sudo apt update
sudo apt install raspberrypi-kernel-headers
Then create a new folder wherever you want and create 3 files: "Makefile", "panel-xxx-xxx.c", "vc4-kms-dsi-xxx.dts". You can refer to the source code. When you finish these files, run make and it will start building automatically. If build success, a "panel-xxx-xxx.ko" file will show in folder.
Next bulid device tree and copy them to corresponding folder.
dtc -@ -I dts -O dtb -o vc4-kms-dsi-xxx.dtbo vc4-kms-dsi-xxx.dts
sudo cp vc4-kms-dsi-xxx.dtbo /boot/overlays/
sudo cp panel-xxx-xxx.ko /lib/modules/`uname -r`/kernel/drivers/gpu/drm/panel
sudo depmod
Finally edit /boot/config.txt and add parameters below to enable the driver.
ignore_lcd=1
dtoverlay=vc4-kms-dsi-xxx # Same as dtbo file name
Reboot your raspberry pi and desktop will show up.