This repository hosts modified drivers and device tree sources needed for the CutiePi board, the open source Raspberry Pi Compute Module 4 carrier board.
Current release is tested on Raspberry Pi OS (arm64 bullseye) with kernel 5.10 and 5.11.
CutiePi tablet uses an 8-inch (800x1280) MIPI DIS TFT LCD display, it has ILI9881C as its LCD driver.
The needed display driver and overlay has been merged into Raspberry Pi's official linux tree (rpi-5.10.y branch). We kept the driver and overlay files in this repo for reference.
A device tree overlay is also needed, which can be compiled from Display/cutiepi-panel-overlay.dts with following command:
dtc -I dts -O dtb -o cutiepi-panel.dtbo cutiepi-panel-overlay.dts
Copy the file to /boot/overlays, then add following configure in config.txt:
# MIPI DSI display
dtparam=i2c_arm=on
dtoverlay=cutiepi-panel
# camera
start_x=1
gpu_mem=128
# Uncomment for camera module v2
#dtoverlay=imx219
dtoverlay=ov5647
Compile the mpu6050-i2c5 overlay and copy it to /boot/overlays.
# Gyroscope
dtoverlay=i2c5,pins_10_11
dtoverlay=mpu6050-i2c5,interrupt=27
otg_mode=1
# MCU reading (ttyS0)
enable_uart=1
dtoverlay=uart1
Make sure #dtparam=spi=on is commented out.