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drm/exynos: iommu: detach from default dma-mapping domain on init 

This patch adds code, which detach sub-device nodes from default iommu
domain if such has been configured. This lets Exynos DRM driver to properly
attach sub-devices to its own, common for all sub-devices domain.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Marek Szyprowski 2015-06-03 10:26:23 +02:00 committed by Inki Dae
parent fb88e21412
commit 452868581d
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/exynos/exynos_drm_iommu.c
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@ -100,6 +100,9 @@ int drm_iommu_attach_device(struct drm_device *drm_dev,
dma_set_max_seg_size(subdrv_dev, 0xffffffffu);
if (subdrv_dev->archdata.mapping)
arm_iommu_detach_device(subdrv_dev);
ret = arm_iommu_attach_device(subdrv_dev, dev->archdata.mapping);
if (ret < 0) {
DRM_DEBUG_KMS("failed iommu attach.\n");