Messages in this thread | | | From | Will Deacon <> | Subject | Re: [PATCH v2] iommu/arm-smmu-qcom: Add missing GMU entry to match table | Date | Tue, 12 Dec 2023 17:21:00 +0000 |
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On Sun, 10 Dec 2023 10:06:53 -0800, Rob Clark wrote: > From: Rob Clark <robdclark@chromium.org> > > In some cases the firmware expects cbndx 1 to be assigned to the GMU, > so we also want the default domain for the GMU to be an identy domain. > This way it does not get a context bank assigned. Without this, both > of_dma_configure() and drm/msm's iommu_domain_attach() will trigger > allocating and configuring a context bank. So GMU ends up attached to > both cbndx 1 and later cbndx 2. This arrangement seemingly confounds > and surprises the firmware if the GPU later triggers a translation > fault, resulting (on sc8280xp / lenovo x13s, at least) in the SMMU > getting wedged and the GPU stuck without memory access. > > [...]
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu-qcom: Add missing GMU entry to match table https://git.kernel.org/will/c/afc95681c306
Cheers, -- Will
https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev
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