Maybe we can check if iommu is enabled in the driver and do the appropriate thing with respect to gfxoff, assuming this is not platform specific.
Alex ________________________________ From: Huang, Ray <ray.hu...@amd.com> Sent: Thursday, August 8, 2019 4:14 AM To: Michel Dänzer <mic...@daenzer.net>; Kai-Heng Feng <kai.heng.f...@canonical.com>; Olsak, Marek <marek.ol...@amd.com> Cc: Zhou, David(ChunMing) <david1.z...@amd.com>; LKML <linux-ker...@vger.kernel.org>; dri-devel@lists.freedesktop.org <dri-devel@lists.freedesktop.org>; Anthony Wong <anthony.w...@canonical.com>; amd-gfx list <amd-...@lists.freedesktop.org>; Deucher, Alexander <alexander.deuc...@amd.com>; Koenig, Christian <christian.koe...@amd.com> Subject: RE: [Regression] "drm/amdgpu: enable gfxoff again on raven series (v2)" > -----Original Message----- > From: Michel Dänzer <mic...@daenzer.net> > Sent: Thursday, August 08, 2019 4:10 PM > To: Huang, Ray <ray.hu...@amd.com>; Kai-Heng Feng > <kai.heng.f...@canonical.com> > Cc: Zhou, David(ChunMing) <david1.z...@amd.com>; LKML <linux- > ker...@vger.kernel.org>; dri-devel@lists.freedesktop.org; Anthony Wong > <anthony.w...@canonical.com>; amd-gfx list <amd- > g...@lists.freedesktop.org>; Deucher, Alexander > <alexander.deuc...@amd.com>; Koenig, Christian > <christian.koe...@amd.com> > Subject: Re: [Regression] "drm/amdgpu: enable gfxoff again on raven series > (v2)" > > On 2019-08-08 8:29 a.m., Huang, Ray wrote: > >> From: Kai-Heng Feng <kai.heng.f...@canonical.com> at 00:03, Huang, > >> Ray <ray.hu...@amd.com> wrote: > >> > >>> May I know the all firmware version in your system? > > > > Seems to the issue we encountered with IOMMU enabled. Could you > please disable iommu in SBIOS or GRUB? > > The driver needs to work with the IOMMU enabled. If nothing else, ROCm > only works with IOMMU I think. > Yes. ROCm in APU required IOMMU v2. So far, I am asking Kai-Heng to do some tests to make sure the issue that was encountered by us before. (+ Marek) Thanks, Ray > > -- > Earthling Michel Dänzer | https://www.amd.com > Libre software enthusiast | Mesa and X developer
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