Hi Alex, I am already using drm_arch_can_wc_memory() set to false. I will try to bisect... Regards, Luís On Tue, Dec 18, 2018 at 7:03 PM Alex Deucher <alexdeucher@xxxxxxxxx> wrote: > > On Tue, Dec 18, 2018 at 8:58 AM Luís Mendes <luis.p.mendes@xxxxxxxxx> wrote: > > > > Hi Christian, > > > > I've been using a Sapphire RX 550 and a Sapphire RX 460 on a custom > > armhf board that runs well with Linux 4.19.9 at least, but now > > starting with Linux kernel 4.20, I'm having a gpu hang, right after > > the console being displayed, but before entering in graphical mode, > > when starting X session. > > I'm only reporting this now, because there was a PCI commit for mvebu > > that also entered for linux-4.20 that caused a kernel oops during > > pci_map_rom call in amdgpu initialization code. I've reverted that > > patch, but now amdgpu is hanging. > > It would be useful if you could bisect. This is the first I've heard > of amdgpu working on an ARM board without write combining (WC) > disabled. You might check to see if disabling WC helps. Return false > in drm_arch_can_wc_memory(). > > Alex > > > > > > > [ 24.801861] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx > > timeout, signaled seq=2, emitted seq=3 > > > > 02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. > > [AMD/ATI] Baffin [Polaris11] (rev ff) (prog-if 00 [VGA controller]) > > Subsystem: Sapphire Technology Limited Baffin [Radeon RX 560] > > Flags: bus master, fast devsel, latency 0, IRQ 51 > > Memory at d0000000 (64-bit, prefetchable) [size=256M] > > Memory at e0000000 (64-bit, prefetchable) [size=2M] > > I/O ports at 10000 [size=256] > > Memory at e0200000 (32-bit, non-prefetchable) [size=256K] > > Expansion ROM at e0240000 [disabled] [size=128K] > > Capabilities: <access denied> > > Kernel driver in use: amdgpu > > Kernel modules: amdgpu > > > > dmesg follows in attachment. > > > > Regards, > > Luís > > _______________________________________________ > > amd-gfx mailing list > > amd-gfx@xxxxxxxxxxxxxxxxxxxxx > > https://lists.freedesktop.org/mailman/listinfo/amd-gfx _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
