ODROID N2+ (odroid-n2plus)

Features
Screen Display works. Ideally with sleep mode and brightness control.	Works
Multimedia
3D Acceleration	Untested

ODROID N2+
	; odroid-n2plus runs postmarketOS
Manufacturer	ODROID
Name	N2+
Codename	odroid-n2plus
Released	2020
Type	single board computer
Hardware
Chipset	Amlogic S922X (rev C)
CPU	Quad-core Cortex-A73 @ 2.4GHz and Dual-core Cortex-A53 @ 2.0GHz
GPU	Mali-G52 GPU with 6x Execution Engines @ 800MHz
Display	none, but HDMI 2.0 connector up to 4K@60Hz with HDR, CEC, EDID
Storage	eMMC connector (8/16/32/64/128GB) and microSD slot (DS/HS modes up to UHS-I SDR104)
Memory	2GB/4GB DDR4 with 32bit bus width, 2640 MT/s data rate (PC4-21333 grade), 1.2V low power design
Architecture	aarch64
Software
Original software The software and version the device was shipped with.	Ubuntu 20.04
Optional software	Android
postmarketOS
Category	testing
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.	yes
pmOS kernel The kernel version that runs on the device's port.	5.14.3
Unixbench score Unixbench Whetstone/Dhrystone score. See Unixbench.	4142.2
Device package	device-odroid-n2plus
Kernel package	linux-postmarketos-amlogic

Contributors

Preparation

The device uses u-boot with petitboot loader loaded in spi memory. Installation to eMMC was tested:

 pmbootstrap build linux-odroid-n2plus
 pmbootstrap build device-odroid-n2plus

Put an eMMC card into eMMC-to-USB3 reader, assumption is it appears as /dev/sdX (replace sdX with correct devicename below), and install to it:

 pmbootstrap install --sdcard /dev/sdX

Afterwards, still this manual step is needed to create u-boot compatible initramfs:

 mount /dev/sdX1 /mnt/boot && \
 cd /mnt/boot && \
 mkimage -A arm64 -T ramdisk -C none -n initramfs -d initramfs initramfs.uimg