On 2018-03-07 10:47 AM, Christian König wrote: > > See when I tested this the DDX and Mesa where unmodified, so both still > assumed VRAM as placement for scanout BOs, but the kernel forced scanout > BOs into GTT for testing. > > So what happened was that on scanout we moved the VRAM BO to GTT and > after unpinning it on the first command submission which used the BO we > moved it back to VRAM again. > > So as long as we don't want a severe performance penalty when you > combine old userspace with new kernel using a kernel parameter to force > scanout from GTT is not possible. That means we either need to come up with a different workaround for hardware issues transitioning between scanout from VRAM and GTT, or we can't scan out from GTT in that case. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer
