drm/tegra: Optionally attach clients to the IOMMU

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If a client is already attached to an IOMMU domain that is not the
shared domain, don't try to attach it again. This allows using the
IOMMU-backed DMA API.

Since the IOMMU-backed DMA API is now supported and there's no way
to detach from it on 64-bit ARM, don't bother to detach from it on
32-bit ARM either.

Signed-off-by: Thierry Reding <treding@nvidia.com>

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This commit is contained in:

Thierry Reding 2019-10-28 13:37:18 +01:00

parent 2e8d8749f6

commit fa6661b7aa

2 changed files with 49 additions and 18 deletions

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66

drivers/gpu/drm/tegra/drm.c

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1

drivers/gpu/drm/tegra/drm.h

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