Adding this patch solves an observed 5 minutes wait delay issue with stable kernels (up to v6.12) on my AcePC T11 (with Atom Z8350 Cherry Trail).

Commit is 5861258c4e6a("drm/i915/dp: Initialize the source OUI write timestamp always") resp. https://patchwork.freedesktop.org/patch/621660/

It apparently appeared upstream with v6.13-rc1 but got not backported.

BR and thanks, Nikolaus