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.Huang@amd.com Sent: Thursday, August 8, 2019 4:14 AM To: Michel Dänzer michel@daenzer.net; Kai-Heng Feng kai.heng.feng@canonical.com; Olsak, Marek Marek.Olsak@amd.com Cc: Zhou, David(ChunMing) David1.Zhou@amd.com; LKML linux-kernel@vger.kernel.org; dri-devel@lists.freedesktop.org dri-devel@lists.freedesktop.org; Anthony Wong anthony.wong@canonical.com; amd-gfx list amd-gfx@lists.freedesktop.org; Deucher, Alexander Alexander.Deucher@amd.com; Koenig, Christian Christian.Koenig@amd.com Subject: RE: [Regression] "drm/amdgpu: enable gfxoff again on raven series (v2)"
-----Original Message----- From: Michel Dänzer michel@daenzer.net Sent: Thursday, August 08, 2019 4:10 PM To: Huang, Ray Ray.Huang@amd.com; Kai-Heng Feng kai.heng.feng@canonical.com Cc: Zhou, David(ChunMing) David1.Zhou@amd.com; LKML <linux- kernel@vger.kernel.org>; dri-devel@lists.freedesktop.org; Anthony Wong anthony.wong@canonical.com; amd-gfx list <amd- gfx@lists.freedesktop.org>; Deucher, Alexander Alexander.Deucher@amd.com; Koenig, Christian Christian.Koenig@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.feng@canonical.com at 00:03, Huang, Ray Ray.Huang@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
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