With the Linux kernel 6.14 out now, I noted in my quick-look overview about a bug that was fixed for the Steam Deck OLED model. Collabora have given a little more info on their work for this issue and how it was a challenge.
https://www.gamingonlinux.com/2025/03/fixing-a-steam-deck-oled-bug-for-the-linux-kernel-6-14-release-was-a-major-challenge/