https://bugs.freedesktop.org/show_bug.cgi?id=107784
--- Comment #4 from Sylvain BERTRAND sylvain.bertrand@gmail.com --- I did a manual bisection and got lucky:
faulty commit: 019cddc88f9e4ae0de2c76802f7137210c2101aa on amd-staging-drm-next
this commit is i2c related, right before the commit 5e8704ac1cfa9fceef94fcc457e18613b1589b34 which is the drm-next commit.