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drm/msm: Be more shouty if per-process pgtables aren't working

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Otherwise it is not always obvious if a dt or iommu change is causing us
to fall back to global pgtable.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/537359/
Link: https://lore.kernel.org/r/20230516222039.907690-2-robdclark@gmail.com
This commit is contained in:
Rob Clark 2023-05-16 15:20:37 -07:00
parent e36ca2fad6
commit 5c054db54c
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/msm/msm_iommu.c
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@ -234,7 +234,12 @@ struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent)
/* Get the pagetable configuration from the domain */
if (adreno_smmu->cookie)
ttbr1_cfg = adreno_smmu->get_ttbr1_cfg(adreno_smmu->cookie);
if (!ttbr1_cfg)
/*
* If you hit this WARN_ONCE() you are probably missing an entry in
* qcom_smmu_impl_of_match[] in arm-smmu-qcom.c
*/
if (WARN_ONCE(!ttbr1_cfg, "No per-process page tables"))
return ERR_PTR(-ENODEV);
pagetable = kzalloc(sizeof(*pagetable), GFP_KERNEL);