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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.</div>
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Alex<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Huang, Ray <Ray.Huang@amd.com><br>
<b>Sent:</b> Thursday, August 8, 2019 4:14 AM<br>
<b>To:</b> Michel Dänzer <michel@daenzer.net>; Kai-Heng Feng <kai.heng.feng@canonical.com>; Olsak, Marek <Marek.Olsak@amd.com><br>
<b>Cc:</b> 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><br>
<b>Subject:</b> RE: [Regression] "drm/amdgpu: enable gfxoff again on raven series (v2)"</font>
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<div class="PlainText">> -----Original Message-----<br>
> From: Michel Dänzer <michel@daenzer.net><br>
> Sent: Thursday, August 08, 2019 4:10 PM<br>
> To: Huang, Ray <Ray.Huang@amd.com>; Kai-Heng Feng<br>
> <kai.heng.feng@canonical.com><br>
> Cc: Zhou, David(ChunMing) <David1.Zhou@amd.com>; LKML <linux-<br>
> kernel@vger.kernel.org>; dri-devel@lists.freedesktop.org; Anthony Wong<br>
> <anthony.wong@canonical.com>; amd-gfx list <amd-<br>
> gfx@lists.freedesktop.org>; Deucher, Alexander<br>
> <Alexander.Deucher@amd.com>; Koenig, Christian<br>
> <Christian.Koenig@amd.com><br>
> Subject: Re: [Regression] "drm/amdgpu: enable gfxoff again on raven series<br>
> (v2)"<br>
> <br>
> On 2019-08-08 8:29 a.m., Huang, Ray wrote:<br>
> >> From: Kai-Heng Feng <kai.heng.feng@canonical.com> at 00:03, Huang,<br>
> >> Ray <Ray.Huang@amd.com> wrote:<br>
> >><br>
> >>> May I know the all firmware version in your system?<br>
> ><br>
> > Seems to the issue we encountered with IOMMU enabled. Could you<br>
> please disable iommu in SBIOS or GRUB?<br>
> <br>
> The driver needs to work with the IOMMU enabled. If nothing else, ROCm<br>
> only works with IOMMU I think.<br>
> <br>
<br>
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)<br>
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Thanks,<br>
Ray<br>
<br>
> <br>
> --<br>
> Earthling Michel Dänzer | <a href="https://www.amd.com">
https://www.amd.com</a><br>
> Libre software enthusiast | Mesa and X developer<br>
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