ZynqMP boot: no messages from SPL other than "Debug uart enabled"

[Major A]

Hi Michal,

>> Thanks for your script, I tried it, it can extract the PMU config object
>> from the FSBL generated by Vitis, but the SD card I prepare this way
>> still doesn't boot.
>>
>> It does one thing differently than before, though: the line
>>
>>     ### ERROR ### Please RESET the board ###
> 
> Can you please try xilinx u-boot master branch instead?

Sadly, the result is exactly the same as before.  BTW, the Rev1.1 
changes are not in master yet, I had to enter them manually.

> Tap delay programming can be one of the reason.
> But the best would be to load it via jtag and look at backtrace where
> the problem is.

How do I debug it via JTAG?  Any instructions on that somewhere?

Cheers,

   András