Hi folks,
I've been using TF-A with mainline U-Boot recently as firmware & boot
loader for a RK3399 Rockpro64 board. I'm compiling TF-A and U-boot based
on this guide [1], using gcc 8.3.0 from Debian.
TF-A v2.1 works fine for this, but I recently tried to switch to TF-A
latest master and found U-Boot gets stuck with this version.
The symptoms are: U-Boot TPL and SPL print starting messages like this:
U-Boot TPL 2019.10-rc4-00037-gdac51e9aaf (Oct 06 2019 - 21:42:50)
Trying to boot from BOOTROM
Returning to boot ROM...
U-Boot SPL 2019.10-rc4-00037-gdac51e9aaf (Oct 06 2019 - 21:42:50 +0000)
Trying to boot from MMC2
...and then there is no more output when normally U-Boot proper would
start, and go on to load the Linux kernel, etc.
Starting from v2.1, with git bisect I found the first 'bad' commit is:
0aad563c7480 rockchip: Update BL31_BASE to 0x40000
and that commit does change some RK3399-related files so seems likely.
I'm not sure how to debug further, any ideas on why boot is hanging
after that change or how to get more debugging information?
Best regards,
Hugh Cole-Baker
[1] https://github.com/u-boot/u-boot/blob/master/doc/README.rockchip
