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@xxxxxxxxxxx>
---
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
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