Comment # 2 on bug 1208173 from Aaron Puchert

(In reply to Chester Lin from comment #1)
> Could you add 'earlycon=sbi' and then remove the 'loglevel' limit from the
> kernel command line in grub2? It could help us to check what happened since
> the earlycon is disabled by default. Thanks.

Produces the exact same output, down to the addresses. Also adding
ignore_loglevel to the command line and removing splash=silent, just to be
safe, so I have

    linux /boot/Image-6.2.0-rc7-12-default root=UUID=[...] earlycon=sbi
ignore_loglevel systemd.show_status=1 console=ttyS0,115200n

changes nothing. Adding "insmod progress" in GRUB gives me:

Loading Linux 6.2.0-rc7-12-default ...
Loading initial ramdisk ...        [ Image-6.2.0-rc7-12-d  28.02MiB  100% 
11.00MiB/s ]
EFI stub: Booting Linux Kernel...  [ initrd-6.2.0-rc7-12-  94.82MiB  100% 
12.67MiB/s ]
EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path
[...]

So kernel and initrd are completely loaded.

I don't think it matters, but a couple of seconds after the sbi_trap_error I
get

i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
i2c read: write daddr 36 to
cannot read pmic power register