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drm/msm/mdp4: stop supporting no-IOMMU configuration 

With the switch to GPUVM the msm driver no longer supports the no-IOMMU
configurations (even without the actual GPU). Return an error in case we
face the lack of the IOMMU for an MDP4 device.

Fixes: 111fdd2198 ("drm/msm: drm_gpuvm conversion")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/672557/
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
pull/1354/merge
Dmitry Baryshkov 2025-09-03 13:51:49 +03:00 committed by Rob Clark
parent 0584da4515
commit cc64568b52
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
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@ -463,9 +463,9 @@ static int mdp4_kms_init(struct drm_device *dev)
ret = PTR_ERR(mmu);
goto fail;
} else if (!mmu) {
DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys "
"contig buffers for scanout\n");
vm = NULL;
DRM_DEV_INFO(dev->dev, "no IOMMU, bailing out\n");
ret = -ENODEV;
goto fail;
} else {
vm = msm_gem_vm_create(dev, mmu, "mdp4",
0x1000, 0x100000000 - 0x1000,