https://bugs.freedesktop.org/show_bug.cgi?id=83500
--- Comment #2 from Grigori Goronzy greg@chown.ath.cx --- Created attachment 105755 --> https://bugs.freedesktop.org/attachment.cgi?id=105755&action=edit Better fix
This is a possibly better fix that only disables DMA if 1D tiling is involved. Please give it a try.