User:Brendlefly62/Radxa ROCK Pi 4C Plus
Construction of this page began 27 September 2023 (Work in Progress)
This is an inexpensive arm64 board...
* There are evidently both "rk3399-rock-4c-plus" AND "rk3399-rock-pi-4c-plus" devices (or at least .dtb files for both) - but the difference is not clear
- The product investigated below was delivered in packaging labeled ROCK 4C Plus, but trial-and-error revealed that its wifi (brcmfmac) works only using the "rk3399-rock-pi-4c-plus.dtb" device tree file
- This product's wifi (brcmfmac) does NOT work when using the rk3399-rock-rc-plus.dtb device tree file
Overall status - this will be a complete from-scratch build. So far, the board has a gentoo rootfs system, a custom gentoo amd64-cross-compiled u-boot, and it has been transitioned from an initial ubuntu-compiled armbian kernel and initrd to a custom gentoo gcc-compiled kernel built from upstream sources (cdn.kernel.org) using "rockchip-sources" (a custom ebuild is available in the "joetoo" repository -- https://github.com/JosephBrendler/joetoo). The kernel was built on a gentoo amd64-cross-compiling desktop workstation, using the author's custom "kernelupdate-embedded" script, also available via ebuild at the link above.
Hardware
Specifications
| Make/model | Notes | |
|---|---|---|
| Board | Radxa ROCK Pi 4C+ | dtb: rk3399-rock-pi-4c-plus.dtb |
| SoC | Rockchip RK3399-T | datasheet |
| RAM | 4GB | LPDDR4 |
| Firmware | U-Boot | rk3399_u-boot-2023.07.02 (cross-compiled by user on Gentoo AMD64 desktop PC) |
| Trusted Firmware A (ATF) | rk3399-atf-2.9.0 (cross-compiled by user on Gentoo AMD64 desktop PC) | |
| Boot media | SD card | eMMC not present but supported by u-boot standard. PXE not tested but supported by u-boot standard. USB boot option exists in u-boot documentation, but it was not tested (and there may be issues with that).[1][2] |
SoC
The hardware is tested on kernel version 6.1.55-current-rockchip64 (ARM64). The 6.5.4 kernel has been built, but has not been tested yet.
| Device | Make/model | Status | kernel drivers | Notes |
|---|---|---|---|---|
| CPU | 64bits hexa core processor Rockchip RK3399-T
4 x Cortex-72, freq 1.5GHz 2 x Cortex-A53, freq 1.0GHz |
Works | ||
| GPU | 4 x Mali T860MP4 gpu, support OpenGL ES 1.1/2.0/3.0/3.1/3.2, Vulkan 1.0, Open CL 1.1 1.2, DX11. | Works | ||
| Memory | LPDDR4 4GB 64bit dual channel LPDDR4@3200Mb/s | Works | ||
| Storage | eMMC connector
μSD card (μSD slot supports up to 256 GB μSD card) |
Works | eMMC not present | |
| Display | One Micro HDMI 2K up to 1440P@60
One Micro HDMI 4K 2.0 up to 4k@60 MIPI DSI 4 lanes via FPC connector Only two of HDMI 2k, HDMI 4K and MIPI DSI can work at the same time. |
Works | Display video is present at boot on the right of 2 HDMI ports | |
| Audio | 3.5mm jack HD codec that supports up to 24-bit/96KHz audio. | Not tested | ||
| Camera | MIPI CSI 2 lanes via FPC connector, support up to 800 MP camera (0.3mm pitch connector). | Not tested | ||
| Wireless | 802.11 ac wifi
BT 5.0 with external antenna |
Works | WiFi works w brcmfmac, wpa_supplicant. BT not tested | |
| USB | USB 3.0 OTG X1, upper one, software configurable to be host or OTG,
USB 3.0 HOST X1, dedicated USB 3.0 channel, lower one USB 2.0 HOST X2 |
Works | ||
| Ethernet | GbE LAN with Power over Ethernet (PoE) support
additional HAT is required for powering from PoE |
Works | ||
| IO | 40-pin expansion header
2 x UART 2 x SPI bus 3 x I2C bus 1 x PCM/I2S 1 x SPDIF 2 x PWM 1 x ADC 6 x GPIO 2 x 5V DC power in 2 x 3.3V DC power in |
Works | ||
| Others | RTC | Not tested | ||
| Power | USB C 5V/3A | Works |
Accessories
- Standard (shipped in starter kit): case, heat sinks, fan, and power supply.
- Keyboard, mouse, micro-HDMI cable, and FTDIboard-with-miniUSB cable provided separately by the user
- Rock 4c plus in operation. Shown here with UART connected via FTDI/USB to a PC for u-boot serial port use.
Cover on
Cover open
Peripherals
| Component | Make/model | Status | Kernel driver(s) | Kernel version | Notes |
|---|---|---|---|---|---|
| PMIC | Rockchip RK808 | Works | rk808 | 5.10 | Power Management Integrated Circuit (Regulators, RTC, Clocking)[3][4] |
| Ethernet PHY | Realtek RTL8211F | Works | realtek_phy | 5.10 | via RGMII |
| Analog Audio | ? | es8316, audio_graph_card | 5.10 |
GCC optimization[5]
ARM errata 835769 and 843419 affect Cortex-A53 up to r0p4 and Linux kernel recommends working around the latter though states nothing about the former.
/etc/portage/make.confRK3399 exampleCOMMON_FLAGS="-march=armv8-a+crc+crypto -mtune=cortex-a72.cortex-a53 -mfix-cortex-a53-835769 -mfix-cortex-a53-843419"
CFLAGS="${COMMON_FLAGS}"
CXXFLAGS="${COMMON_FLAGS}"
For a hardened system consider appending
-fstack-protector-allGentoo Installation Options and Procedures
Getting to Know the Board
The purpose of this guide is to document "from scratch" procedures for installing a pure gentoo system on this SBC. However the quicker way to get gentoo up and running is to install another distribution, and replace the root file system contents. See User:Brendlefly62/Radxa ROCK Pi 4C Plus/Getting to Know the Board
Bootloader Build and Installation
To build a U-Boot bootloader from sources, see User:Brendlefly62/Radxa ROCK Pi 4C Plus/Build-Install-U-Boot
Assemble a Working Gentoo System
To assemble a working Gentoo system with minimal effort, using resources developed above, consult User:Brendlefly62/Radxa ROCK Pi 4C Plus/Assemble a Gentoo System
Kernel Build and Installation
To build a gentoo linux kernel (including modules, device tree blobs, etc) from sources, see User:Brendlefly62/Radxa ROCK Pi 4C Plus/Build-Install-Kernel
Install a Gentoo System "From Scratch"
To install Gentoo from scratch on this board, consult User:Brendlefly62/Radxa ROCK Pi 4C Plus/Gentoo From Scratch
Bootable gentoo system images
To use pre-built bootable system images files, see User:Brendlefly62/Radxa ROCK Pi 4C Plus/Bootable-System-Images
See also
- PINE64 ROCKPro64 — the Radxa ROCK 4C+ SBC employs the same SoC as the PINE64 ROKCPro64, so the associated article on that SBC may also be helpful.
External resources
- OKdo.com Rock Pi 4c Plus page ($55), accessed circa 15 September 2023
- Radxa Rock 4C Plus Development Guide, first visit circa 20 September 2023
- Radxa Development Guide to Armbian Build, first visit circa 23 September 2023
- PINE64 ROCKPro64, retrieved 22 September 2023
- RK3399-T Datasheet, retrieved 27 September 2023
- How to Compile Armbian: Step-by-Step Tutorial for Beginners , first visit circa 23 September 2023
- Debug output in "somewhat successful build" First accessed 28 September 2023 (useful lsmod list and dmesg hardware/driver recognition information)
References
- ↑ PINE64 ROCKPro64
- ↑ https://gitlab.manjaro.org/manjaro-arm/packages/core/uboot-rockpro64/-/issues/4
- ↑ https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1903318.html
- ↑ Fuzhou Rockchip Electronics Co., Ltd., RK808 Datasheet V0.8 (PDF), PINE64. Retrieved on January 25th, 2021
- ↑ PINE64 ROCKPro64#GCC optimization