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gpu: host1x: Skip IOMMU initialization if firewall is enabled 

Host1x's CDMA can't access the command buffers if IOMMU and Host1x
firewall are enabled in the kernels config because firewall doesn't map
the copied buffer into IOVA space. Fix this by skipping IOMMU
initialization if firewall is enabled as firewall merges sparse cmdbufs
into a single contiguous buffer and hence IOMMU isn't needed in this case.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Dmitry Osipenko 2018-05-19 04:07:10 +03:00 committed by Thierry Reding
parent ce397d215c
commit 4466b1f0e0
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/host1x/dev.c
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@ -218,6 +218,9 @@ static int host1x_probe(struct platform_device *pdev)
return err;
}
if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
goto skip_iommu;
host->group = iommu_group_get(&pdev->dev);
if (host->group) {
struct iommu_domain_geometry *geometry;