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drm/tegra: Fix SMMU support on Tegra124 and Tegra210

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When testing whether or not to enable the use of the SMMU, consult the
supported DMA mask rather than the actually configured DMA mask, since
the latter might already have been restricted.

Fixes: 2d9384ff91 ("drm/tegra: Relax IOMMU usage criteria on old Tegra")
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2020-03-25 21:16:03 +01:00
parent 8f3d9f3542
commit 501be6c1c7
3 changed files with 18 additions and 1 deletions
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3
include/linux/host1x.h
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@ -17,9 +17,12 @@ enum host1x_class {
HOST1X_CLASS_GR3D = 0x60,
};
struct host1x;
struct host1x_client;
struct iommu_group;
u64 host1x_get_dma_mask(struct host1x *host1x);
/**
* struct host1x_client_ops - host1x client operations
* @init: host1x client initialization code