Commit c04d9eb7 authored Jun 17, 2016 by Marek Szyprowski Committed by Inki Dae Jul 13, 2016

drm/exynos: iommu: add a check if all sub-devices have iommu controller



This patch adds a check if all devices belonging to Exynos DRM have the
same dma_map_ops set. This is required to enable operation with IOMMU
enabled.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

parent f7c72773

drivers/gpu/drm/exynos/exynos_drm_iommu.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -97,6 +97,11 @@ int drm_iommu_attach_device(struct drm_device *drm_dev,
		if (!priv->mapping)
		return 0;

		if (get_dma_ops(priv->dma_dev) != get_dma_ops(subdrv_dev)) {
		DRM_ERROR("Device %s lacks support for IOMMU\n",
		dev_name(subdrv_dev));
		return -EINVAL;
		}

		ret = configure_dma_max_seg_size(subdrv_dev);
		if (ret)