[BUG] Hang shortly after loading FDT when booting on RK3399

[Jean Lucas]

Hello all,

On Pine64 RockPro64 and Pinebook Pro (both RK3399), flashing U-Boot 
v2021.01-rc2-47-g9324c9a823 defconfig and mainline ATF 
v2.4-rc0-2-gd01f31c03 to SPI flash of both devices results in a hang 
shortly after loading the appropriate FDT when booting.

On a Pinebook Pro:

=> load mmc 0:1 ${kernel_addr_r} Image
32418304 bytes read in 1448 ms (21.4 MiB/s)
=> load mmc 0:1 ${fdt_addr_r} dtbs/rockchip/rk3399-pinebook-pro.dtb
80831 bytes read in 27 ms (2.9 MiB/s)
=> load mmc 0:1 ${ramdisk_addr_r} initramfs-linux.img
29698825 bytes read in 1291 ms (21.9 MiB/s)
=> setenv bootargs console=ttyS2,1500000 console=tty0 
root=/dev/ghost/root audit=0
=> booti ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r}
Moving Image from 0x2080000 to 0x2200000, end=41c0000
## Flattened Device Tree blob at 01f00000
    Booting using the

Behavior is the same on RockPro64.

Worth mentioning is that U-Boot from about a week ago (I think 
rc2-4-gf36603c7a8) with same mainline ATF version written to eMMC 
results in a working boot on Pinebook Pro, so bug seems to be when 
booting from SPI.

To further the hypothesis, on RockPro64, the latest U-Boot I can use 
from SPI (defconfig) is release 2020.04, since later releases also hang 
on loading the appropriate FDT when booting as described above.

Any ideas as to what could be causing the hangs?


Regards,

Jean