Commit 5c054db5 authored by Rob Clark's avatar Rob Clark
Browse files

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



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

Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/537359/
Link: https://lore.kernel.org/r/20230516222039.907690-2-robdclark@gmail.com
parent e36ca2fa

drivers/gpu/drm/msm/msm_iommu.c

+6 −1
Original line number Diff line number Diff line
@@ -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);