https://bugs.freedesktop.org/show_bug.cgi?id=107978
--- Comment #38 from Shmerl shtetldik@gmail.com --- (In reply to Jerry Zuo from comment #30)
Please try the patch, and see if you can see reg_wait timeout dce110_stream_encoder_dp_blank()
Do you plan to backport at least this patch to 4.20.x?