https://bugs.freedesktop.org/show_bug.cgi?id=91801
--- Comment #1 from Sylvain BERTRAND sylvain.bertrand@gmail.com --- I tried with latest agd5f drm-next-4.3 (c2b6bd7e91aad8440a2f55bdbde6f5a8ae19fac5) The performance loss is the same than with the official 4.2-rc8.