On 7 December 2017 at 19:11, Michel Dänzer <michel at daenzer.net> wrote: > On 2017-12-07 10:35 AM, Xinliang Liu wrote: >> Hi, >> >> We are trying ATI HD 7470 card on arm64 platform D05 with kernel 4.1.40. >> But it failed with kernel log: >> radeon 0005:01:00: ring 0 stalled for more than 10000msec >> radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001 >> last fence id 0x0000000000000002 on ring0) >> radeon 0005:01:00: ring 0 stalled for more than 10500msec >> radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001 >> last fence id 0x0000000000000002 on ring0) >> radeon 0005:01:00: ring 0 stalled for more than 11000msec >> radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001 >> last fence id 0x0000000000000002 on ring0) >> radeon 0005:01:00: ring 0 stalled for more than 11500msec >> radeon 0005:01:00: GPU lockup (current fence id 0x0000000000000001 >> last fence id 0x0000000000000002 on ring0) >> ... >> >> Any clue? > > Any chance you can try a newer kernel? Somebody else (also @huawei.com > incidentally) reported just this week on the mesa-dev mailing list that > the amdgpu driver in the Ubuntu 4.13 kernel is working on an arm64 platform. > > If a newer kernel still doesn't work on your platform, please provide > the full dmesg output. Hope we have change to try newer kernel. After tracking the mainline we had found that this commit[1] fixed this issue. The root cause is that on old kernel ttm can't succeed to set page writecombine property which make cpu/gpu in fatal status and stub. Anyway, we should use newer kernel and keep on testing. [1] f135b97 drm/ttm: recognize ARM64 arch in ioprot handler https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v4.15-rc2&id=f135b978c2dab3d439eacb8353d3c0aac6af072a > > > BTW, in the other thread it was reported that Mesa has bugs which can be > worked around by compiling it with -fsigned-char. Thanks for letting us know this. Had looked into the mesa bug. Thanks, Xinliang > > > -- > Earthling Michel Dänzer | http://www.amd.com > Libre software enthusiast | Mesa and X developer
