This is supposed to be fixed upstream by:
commit b3656b355b5522cef1b52a7469010009c98156db
Author: Ivan Lipski <ivan.lipski@amd.com>
Date: Wed Sep 17 11:00:02 2025 -0400
drm/amd/display: Fix incorrect return of vblank enable on unconfigured crtc
which went into 6.18-rc4.
Ben.
--
Ben Hutchings
Lowery's Law:
If it jams, force it. If it breaks, it needed replacing anyway.
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