Comment # 68 on bug 106175 from bmilreu@gmail.com

(In reply to tempel.julian from comment #67)
> Just wanted to note that applying
> [PATCH 1/2] drm/amd/display: Use private obj helpers for dm_atomic_state
> [PATCH 2/2] drm/amd/display: Remove wait for hw/flip done in atomic check
> does not solve/workaround the issue, unlike Brandon's patch.

try 0001-drm-amd-display-Add-fast-path-for-legacy-cursor-plan.patch