Tried the 4.4 images (
apt install linux-dtb-legacy-rockchip linux-image-legacy-rockchip
... which bricks it nicely, but during early boot it does at least I get some trace of the device:
U-Boot 2020.07-armbian (Oct 19 2020 - 00:10:11 +0200)
SoC: Rockchip rk3399
Reset cause: POR
Model: FriendlyElec NanoPC-T4
DRAM: 3.9 GiB
PMIC: RK808
MMC: mmc@fe310000: 2, mmc@fe320000: 1, sdhci@fe330000: 0
Loading Environment from MMC... *** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Model: FriendlyElec NanoPC-T4
Net: eth0: ethernet@fe300000
Hit any key to stop autoboot: 0
Card did not respond to voltage select!
switch to partitions #0, OK
mmc0(part 0) is current device
Scanning mmc 0:1...
Found U-Boot script /boot/boot.scr
3185 bytes read in 18 ms (171.9 KiB/s)
## Executing script at 00500000
Boot script loaded from mmc 0
181 bytes read in 15 ms (11.7 KiB/s)
6557203 bytes read in 645 ms (9.7 MiB/s)
8565640 bytes read in 832 ms (9.8 MiB/s)
libfdt fdt_check_header(): FDT_ERR_BADMAGIC
No FDT memory address configured. Please configure
the FDT address via "fdt addr <address>" command.
Aborting!
Bad Linux ARM64 Image magic!
SCRIPT FAILED: continuing...
Device 0: Vendor: 0x144d Rev: 1L2QEXD7 Prod: S41GNX0M266030
Type: Hard Disk
Capacity: 244198.3 MB = 238.4 GB (500118192 x 512)
... is now current device
Scanning nvme 0:1...
starting USB...
Bus usb@fe380000: USB EHCI 1.00
Bus usb@fe3c0000: USB EHCI 1.00
Bus dwc3: Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.10
Bus dwc3: Register 2000140 NbrPorts 2
Starting the controller
USB XHCI 1.10
scanning bus usb@fe380000 for devices... 1 USB Device(s) found
scanning bus usb@fe3c0000 for devices... 1 USB Device(s) found
scanning bus dwc3 for devices... 1 USB Device(s) found
scanning bus dwc3 for devices... 1 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found
This looks like uboot finding it. It subsequently tries to network boot. Any tips for attempting to debug this further? What are the moving parts? Is it just going be kernel PCIe init/probe code, or is there rockchip firmware at play too?
Cheers!
Tim.
