Am 12.10.2018 um 10:26 schrieb Michel Dänzer: > On 2018-10-11 9:44 p.m., Harry Wentland wrote: >> On 2018-10-03 04:25 AM, Mike Lothian wrote: >>> I'm curious to know whether this will/could work over PRIME >> I don't see why this shouldn't work over PRIME as long as the >> presenting GPU supports the new variable refresh rate API, but I know >> very little about prime, so maybe someone else can chime in and give >> a better opinion. > It won't work for displays connected to a secondary GPU, because those > aren't hooked up to the Present extension directly. > > It can theoretically work with render offloading, if the primary GPU can > scan out directly from the shared pixmap. This is only possible with > current AMD APUs which support scatter/gather scanout (Carrizo and > newer?). Actually only Carizzo and Stoney at the moment because this is buggy on Raven. Not sure if that is a pure software or a hardware problem. Christian. > One gotcha is that xf86-video-amdgpu currently doesn't allow > flipping between buffers with different tiling parameters (BTW Harry, > does that work with DC?), but that should be easy to fix. _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
