On Tue, 8 Jan 2019 at 17:24, Jeremy Linton <jeremy.lin...@arm.com> wrote: > > Hi, > > On 01/08/2019 08:28 AM, Ard Biesheuvel wrote: > > Hi Bero, > > > > On Tue, 8 Jan 2019 at 15:25, Bero Rosenkränzer > > <bernhard.rosenkran...@linaro.org> wrote: > > ... > >> > >>> This is bad for the ARM ecosystem, since it is the > >>> only driver we have for NVIDIA hardware, and it has fewer issues than > >>> AMD GPU drivers + hardware running on ARM systenms. > >> > >> What's the problem with AMD GPU drivers on ARM? Just missing > >> workarounds for things like the SynQuacer PCIE bug? > >> On x86, AMD drivers tend to work better than NVIDIA, so maybe the > >> simple (and acceptable, given NVIDIA refuses to join) fix would be > >> improving AMD drivers and telling NVIDIA to go to hell... > >> > > > > AMD gfx cards produce lots of visual corruption under Linux on all of > > the arm64 boards I tried (including Seattle which has properly working > > PCIe), and I have never managed to get anyone interested in looking > > into it (although I didn't try /that/ hard tbh) > > Presumably amdgpu, and a more recent board? I had good luck with a > hd5450 and the radeon driver although in its default configuration it > expects to bootstrap the card using PCI PIO.
HD5450 is what I used as well. Which h/w did you use? Also, is there anything wrong with using PCI PIO? > Nouveau is hardly free from > failures either, particularly if you happen to be running a 64k kernel. > Oh absolutely. It's just that in the configurations I use (AMD Seattle and Socionext SynQuacer with GeForce 210 and 710), I haven't seen any stability issues in quite some time, and I use these systems as desktop machines all the time. > Given that AMD has been a bit more open with their documentation, has an > aarch64 UEFI/GOP driver on their site > (https://www.amd.com/en/support/kb/release-notes/rn-aar), and doesn't > seem to suffer as much when running !4k kernels, fixing it sounds well > worth the effort. Between you and me (and everyone else on cc), that GOP driver is in pretty bad shape tbh. The AMD guys did show up at the plugfest, though, and were eager to get it fixed. So yes, I would love to see this improve as well. _______________________________________________ cross-distro mailing list cross-distro@lists.linaro.org https://lists.linaro.org/mailman/listinfo/cross-distro
