Strix Halo gfx1151 (ASUS GZ302EA): PSP hw_init fails on one unit — mmhub fault from MP0 during TMR setup (drm/ amd issue #5679)

Hi,

I filed https://gitlab.freedesktop.org/drm/amd/-/issues/5679 a couple of
days
ago and wanted to flag it here since it may be interesting to whoever owns
the
PSP init path on gfx1151.

Short version: on my ASUS ROG Flow Z13 GZ302EA (Ryzen AI MAX+ 395 / Radeon
8060S), amdgpu has never initialized. The PSP itself raises a memory fault
while setting up its Trusted Memory Region, and hw_init of the psp block
fails. The exact sequence, identical on every attempt:

  amdgpu 0000:65:00.0: [mmhub] page fault ... Faulty UTCL2 client ID: MP0
(0x6)
  amdgpu 0000:65:00.0: amdgpu: psp gfx command ID_LOAD_TOC(0x20) failed and
response status is (0x0)
  amdgpu 0000:65:00.0: amdgpu: PSP tmr init failed!
  amdgpu 0000:65:00.0: amdgpu: hw_init of IP block <psp> failed -22

On top of that, the cleanup path then hits a vcn_v4_0_5_sw_fini Oops with
IRQs
disabled, which can hard-hang the machine. nomodeset is the only stable
state.

What makes it interesting: Windows 11 + Adrenalin works perfectly on the
same
unit, and at least one other GZ302EA on the same BIOS (.311) reportedly
boots
Linux fine — so this smells like per-unit PSP/firmware state rather than a
generic driver bug. I reproduced it across 5 kernels (6.18 LTS through 7.2 —
newer ones actually fail earlier), a BIOS re-flash via EZ Flash, live USB,
and
every relevant module parameter I could find. Full 837-line dmesg of the
manual modprobe sequence is attached to the issue.

Two questions I couldn't answer from the outside:

1. Is there any way to dump or reset the PSP NVRAM/state on Strix Halo from
   the OS or BIOS? (The firmware setup variables include an ASUS
   "AsusClearPspNvram" knob I have not touched yet — is that path
known/safe?)
2. Is there an expected TMR base/size on this platform that the BIOS might
be
   misprogramming on some units?

The machine is set up for safe remote testing (SSH from a second laptop,
amdgpu blacklisted at boot), so I'm happy to try patches or dump anything
useful.

Thanks,
Abdulaziz AlMutairi