radeonsi/19.3: backport ab54624d

Backport ab54624d from !3430 (merged).

See issues:

• drm/amd#607 (closed)
• #1257
• https://bugzilla.kernel.org/show_bug.cgi?id=206383
• drm/amd#1023 (closed)
• drm/amd#828 (comment 399733)