PockPi 4C plus - probably incorrect dtb: rk3399-rock-4c-plus.dtb vs rk3399-rock-pi-4c-plus.dtb

[Dave]

Hello to everyone

 

Trying to use armbian on RockPi 4C plus.
Got kernel OOPS.
Kernel crushes in different moments: mostly during systemd units starting or just after boot finished.
Backtraces are different (no common).

 

Faulty images:

1) From the
https://www.armbian.com/rockpi4/
For Model C+ here: https://redirect.armbian.com/rockpi-4cplus
https://mirrors.dotsrc.org/armbian-dl/rockpi-4cplus/archive/
Armbian_22.11.1_Rockpi-4cplus_bullseye_current_5.15.80_minimal.img

2) Built by myself
Armbian_22.11.2_Rockpi-4cplus_bullseye_current_5.15.84_minimal.img
Armbian_23.02.0-trunk_Rockpi-4cplus_bullseye_edge_6.1.8_minimal.img
Armbian_23.02.0-trunk_Rockpi-4cplus_bullseye_edge_6.1.9_minimal.img
Armbian_23.02.0-trunk_Rockpi-4cplus_bullseye_edge_6.1.10_minimal.img

 

My image build script for the edge (6.1.x):
 

#!/bin/bash

BOARD_NAME_PARAM="rockpi-4cplus"
LINUX_DISTRO_PARAM="bullseye"
LOG_FILE="_armbian_build_${BOARD_NAME_PARAM}.log"
BRANCH_VALUE="edge"

log()
{
    local currtime=`date +"%Y/%m/%d %H:%M:%S"`
    echo "$currtime: $*"
    echo "$currtime: $*" >> $LOG_FILE
}


log "$0 begin"

ARMBIAN_BUILD_OPTIONS="\
BOARD=$BOARD_NAME_PARAM \
BRANCH=$BRANCH_VALUE \
FULL_DESKTOP=no \
BUILD_DESKTOP=no \
BUILD_MINIMAL=yes \
INSTALL_HEADERS=no \
KERNEL_ONLY=no \
KERNEL_CONFIGURE=no \
RELEASE=$LINUX_DISTRO_PARAM \
COMPRESS_OUTPUTIMAGE=\"sha,img,xz\" \
"

log "ARMBIAN_BUILD_OPTIONS=$ARMBIAN_BUILD_OPTIONS"

log
log "===================================="
log "Armbian build - starting ..."
log "===================================="
sudo ./compile.sh $ARMBIAN_BUILD_OPTIONS
armbian_compile_result=$?
if [ $armbian_compile_result -eq 0 ]; then
    log "===================================="
    log "Armbian build finished: SUCCESS"
    log "===================================="
else
    log "===================================="
    log "Armbian build failed: ERROR"
    log "===================================="
fi

log "$0 end"

exit 0

 

All the faulty images have common thing in /boot/armbianEnv.txt

fdtfile=rockchip/rk3399-rock-pi-4c-plus.dtb

 

As I found out there are 2 dtbs referring to rockpi 4cplus:
/boot/dtb-6.1.10-rockchip64/rockchip/rk3399-rock-4c-plus.dtb
/boot/dtb-6.1.10-rockchip64/rockchip/rk3399-rock-pi-4c-plus.dtb

 

Vanilla kernel 
https://github.com/torvalds/linux/tree/master/arch/arm64/boot/dts/rockchip

has rk3399-rock-4c-plus dts
https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts

and does not have
rk3399-rock-pi-4c-plus

 

 

I've changed /boot/armbianEnv.txt in the following way

fdtfile=rockchip/rk3399-rock-4c-plus.dtb

 

WIth rk3399-rock-4c-plus.dtb my RockPi 4C plus board boots fine and does not hang.

 

I believe there is a mistake in dtb files.

 

Why there are 2 dtbs
/boot/dtb/rockchip/rk3399-rock-4c-plus.dtb
/boot/dtb/rockchip/rk3399-rock-pi-4c-plus.dtb
?
 

Edited February 10, 2023 by Dave

[krankes_etwas]

another issue but I can confirm that  all the rock 4c+ dtb's  are probably faulty.

With all of them with different OS & Kernel my GPU isn't detected but as soon I switch to 4C or 4B dtb my gpu is detected...... took a while to figure that out 😵‍

any ideas ?

Edited March 4, 2023 by krankes_etwas

[Michael Beck]

I can confirm that rk3399-rock-4c-plus.dtb is slightly better. No kernel ops on boot, and I was able to write the image to emmc and boot from it.  With rk3399-rock-pi-4c-plus.dtb emmc writes generate errors and the resulting fs is broken.