[PATCH] ARM: uncompress: Enable debug in head.S

[Linus Walleij]

On Wed, Nov 4, 2020 at 9:40 PM Dmitry Osipenko <digetx at gmail.com> wrote:
> 29.09.2020 16:48, Linus Walleij пишет:

> >> I also tried to revert only the "ARM: 9006/1: uncompress: Wait for ready
> >> and busy in debug prints" patch and got this in QEMU:
> >>
> >> Starting kernel ...
> >>
> >> DTB:0x016F6A20 (0x00005DA6)
> >> C:0x010000C0-0x016FC820->0x0125AF00-0x01957660
> >> Uncompressing Linux...
> > (...)
> >> LZMA data is corrupt
> >>
> >>  -- System halted
> >
> > Hmmmm is the physical and virtual address to the UART
> > really correct?
> >
> > Else it might write in some random memory.
>
> Hello Linus,
>
> Just want to let you know that the problem isn't fixed yet and I haven't
> got around to work on yet too. Hopefully next week!

OK it's "just" debug code after all but it is working on at least 5
different platforms I tested with so I strongly suspect something
fishy with the Tegra include/debug/tegra.S.

This debug macro file is bigger than any of the others and I
see some suspicious amount of clock code and what not
in there so I am not sure what can cause this.

I would test to implement waituarttxrdy first and see what
happens if you just do that. I remember that those early
debug prints use the macros slightly different from the
"Uncompressing..." message.

Yours,
Linus Walleij