[PATCH 5/7] drm/exynos: attach drm device with common drm mapping

[Prathyush K]

This patch sets the common mapping created during drm init, to the
drm device's archdata. The dma_ops of drm device is set as arm_iommu_ops.
The common mapping is shared across all the drm devices which ensures
that any buffer allocated with drm is accessible by drm-fimd or drm-hdmi
or both.

Signed-off-by: Prathyush K <prathyush.k at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_drv.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index c3ad87e..2e40ca8 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -276,6 +276,15 @@ static struct drm_driver exynos_drm_driver = {
 
 static int exynos_drm_platform_probe(struct platform_device *pdev)
 {
+#ifdef CONFIG_EXYNOS_IOMMU
+	struct device *dev = &pdev->dev;
+
+	kref_get(&exynos_drm_common_mapping->kref);
+	dev->archdata.mapping = exynos_drm_common_mapping;
+	set_dma_ops(dev, &arm_iommu_ops);
+
+	DRM_INFO("drm common mapping set to drm device.\n");
+#endif
 	DRM_DEBUG_DRIVER("%s\n", __FILE__);
 
 	exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
-- 
1.7.0.4