path: root/drivers/gpu/host1x
diff options
authorDmitry Osipenko <>2018-05-19 04:07:10 +0300
committerThierry Reding <>2018-07-09 10:31:10 +0200
commit4466b1f0e022f94a026bd700fee34bff15cdc4ef (patch)
treef89e9a1ee8a9e32d9831116f376da4bc8c047583 /drivers/gpu/host1x
parentce397d215ccd07b8ae3f71db689aedb85d56ab40 (diff)
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 <> Signed-off-by: Thierry Reding <>
Diffstat (limited to 'drivers/gpu/host1x')
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index f1d5f76e9c33..d88073e7d22d 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -218,6 +218,9 @@ static int host1x_probe(struct platform_device *pdev)
return err;
+ goto skip_iommu;
host->group = iommu_group_get(&pdev->dev);
if (host->group) {
struct iommu_domain_geometry *geometry;