drm/tegra: Use IOMMU groups
In order to support IOMMUs more generically and transparently handle the
ARM SMMU on Tegra186, move to using groups instead of devices for domain
attachment. An IOMMU group is a set of devices that share the same IOMMU
domain and is therefore a good match to represent what Tegra DRM needs.
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
index c52bc59..da3d8c1 100644
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -60,6 +60,7 @@ struct tegra_drm {
struct drm_device *drm;
struct iommu_domain *domain;
+ struct iommu_group *group;
struct mutex mm_lock;
struct drm_mm mm;