[Bug 221073] xHCI host controller dies on resume from s2idle on AMD Strix Halo [1022:1587]

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221073

--- Comment #52 from Mario Limonciello (AMD) (mario.limonciello@amd.com) ---
Created attachment 310440
  --> https://bugzilla.kernel.org/attachment.cgi?id=310440&action=edit
possible patch for device link

Thanks for doing more testing.  I still do think there is a race going on here;
but my current thought is it might actually be related to how long it takes for
internal restore of the GPU when the VRAM is larger.

One of the proposals was to make a device link via a quirk, which doesn't scale
too well.  But we could try to do a device link when an APU has XHCI and
display under a common root port.

Can you try this patch?  It's intentionally going to be noisy at probe so you
can confirm it actually made the link.

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