From: Will Deacon <will@kernel.org>
To: Rob Clark <robdclark@gmail.com>
Cc: Eric Anholt <eric@anholt.net>,
dri-devel <dri-devel@lists.freedesktop.org>,
linux-arm-msm <linux-arm-msm@vger.kernel.org>,
freedreno <freedreno@lists.freedesktop.org>,
Sean Paul <sean@poorly.run>,
Jordan Crouse <jcrouse@codeaurora.org>,
Robin Murphy <robin.murphy@arm.com>,
Rob Herring <robh+dt@kernel.org>, Joerg Roedel <joro@8bytes.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] iommu/arm-smmu-qcom: Skip the TTBR1 quirk for db820c.
Date: Tue, 30 Mar 2021 10:34:33 +0100 [thread overview]
Message-ID: <20210330093432.GB5281@willie-the-truck> (raw)
In-Reply-To: <CAF6AEGugpEk396DVtWX=W+uf3p-wcgBfCSpSLWGQJE1vKpJ4aw@mail.gmail.com>
On Mon, Mar 29, 2021 at 09:02:50PM -0700, Rob Clark wrote:
> On Mon, Mar 29, 2021 at 7:47 AM Will Deacon <will@kernel.org> wrote:
> >
> > On Fri, Mar 26, 2021 at 04:13:02PM -0700, Eric Anholt wrote:
> > > db820c wants to use the qcom smmu path to get HUPCF set (which keeps
> > > the GPU from wedging and then sometimes wedging the kernel after a
> > > page fault), but it doesn't have separate pagetables support yet in
> > > drm/msm so we can't go all the way to the TTBR1 path.
> >
> > What do you mean by "doesn't have separate pagetables support yet"? The
> > compatible string doesn't feel like the right way to determine this.
>
> the compatible string identifies what it is, not what the sw
> limitations are, so in that regard it seems right to me..
Well it depends on what "doesn't have separate pagetables support yet"
means. I can't tell if it's a hardware issue, a firmware issue or a driver
issue.
Will
next prev parent reply other threads:[~2021-03-30 9:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-26 23:13 [PATCH 1/2] iommu/arm-smmu-qcom: Skip the TTBR1 quirk for db820c Eric Anholt
2021-03-26 23:13 ` [PATCH 2/2] arm64: dts: msm8996: Mark the GPU's SMMU as an adreno one Eric Anholt
2021-03-30 3:23 ` Bjorn Andersson
2021-03-29 14:47 ` [PATCH 1/2] iommu/arm-smmu-qcom: Skip the TTBR1 quirk for db820c Will Deacon
2021-03-29 17:55 ` Eric Anholt
2021-03-30 4:02 ` Rob Clark
2021-03-30 9:34 ` Will Deacon [this message]
2021-03-30 15:03 ` Rob Clark
2021-03-30 15:31 ` Will Deacon
2021-03-30 16:07 ` Rob Clark
2021-05-25 17:14 ` Bjorn Andersson
2021-03-30 3:22 ` Bjorn Andersson
2021-06-08 11:42 ` Will Deacon
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