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drm/tegra: Add IOMMU support

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When an IOMMU device is available on the platform bus, allocate an IOMMU
domain and attach the display controllers to it. The display controllers
can then scan out non-contiguous buffers by mapping them through the
IOMMU.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2014-06-26 21:41:53 +02:00
parent 1d1e6fe9b5
commit df06b759f2
6 changed files with 309 additions and 34 deletions
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5
drivers/gpu/drm/tegra/drm.h
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@@ -39,6 +39,9 @@ struct tegra_fbdev {
struct tegra_drm {
struct drm_device *drm;
struct iommu_domain *domain;
struct drm_mm mm;
struct mutex clients_lock;
struct list_head clients;
@@ -121,6 +124,8 @@ struct tegra_dc {
struct drm_pending_vblank_event *event;
const struct tegra_dc_soc_info *soc;
struct iommu_domain *domain;
};
static inline struct tegra_dc *