4.20 regression: short time display corruption during resume

[Rafał Miłecki]

Hi,

I use HP EliteBook 745 G5 with Ryzen 5 PRO 2500U. With kernels 4.20
and 5.0.0-rc3 I see a display corruption during resume from RAM. It's
a short time corruption of black screen only, after less than second
an expected image appears, so nothing critical.

It's a regression though so I somehow hope it may be easy to fix. It's
caused by the commit 009d9ed6c4b7 ("drm/amdgpu: Change AI gfx/sdma/smu
init sequence").

I've created a bugzilla report for it:
https://bugs.freedesktop.org/show_bug.cgi?id=109554
(includes corruption photo).

Could someone look at this, please? I'm happy to test any patches.

--
Rafał