Commit 4466b1f0 authored May 19, 2018 by Dmitry Osipenko Committed by Thierry Reding Jul 09, 2018

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>

parent ce397d21

drivers/gpu/host1x/dev.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;

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