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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2012 Samsung Electronics Co., Ltd.
// Author: Andrzej Hajda <a.hajda@samsung.com>
#include "exynos_drm_drv.h"
#include "exynos_drm_iommu.h"
int exynos_drm_register_dma(struct drm_device *drm, struct device *dev)
{
struct exynos_drm_private *priv = drm->dev_private;
int ret;
if (!priv->dma_dev) {
priv->dma_dev = dev;
DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
dev_name(dev));
/* create common IOMMU mapping for all Exynos DRM devices */
ret = drm_create_iommu_mapping(drm);
if (ret < 0) {
priv->dma_dev = NULL;
DRM_ERROR("failed to create iommu mapping.\n");
return -EINVAL;
}
}
return drm_iommu_attach_device(drm, dev);
}
void exynos_drm_unregister_dma(struct drm_device *drm, struct device *dev)
{
if (IS_ENABLED(CONFIG_EXYNOS_IOMMU))
drm_iommu_detach_device(drm, dev);
}
void exynos_drm_cleanup_dma(struct drm_device *drm)
{
if (IS_ENABLED(CONFIG_EXYNOS_IOMMU))
drm_release_iommu_mapping(drm);
}
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