drm/rockchip: logo: no need IOMMU_WRITE for logo

Change-Id: Id047a37db7ffa865403b99429e8cdbd37a588e59
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 4c58306c606f68d8d7dc7c9683a51c7268b0d450..2da8f030fcd79a2d72c1a39f473abfddce8093b3 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -149,8 +149,6 @@ static int init_loader_memory(struct drm_device *drm_dev)
        }
 
        if (private->domain) {
-               int prot = IOMMU_READ | IOMMU_WRITE;
-
                memset(&logo->mm, 0, sizeof(logo->mm));
                ret = drm_mm_insert_node_generic(&private->mm, &logo->mm,
                                                 size, PAGE_SIZE,
@@ -164,7 +162,7 @@ static int init_loader_memory(struct drm_device *drm_dev)
 
                logo->iommu_map_size = iommu_map_sg(private->domain,
                                                    logo->dma_addr, sgt->sgl,
-                                                   sgt->nents, prot);
+                                                   sgt->nents, IOMMU_READ);
                if (logo->iommu_map_size < size) {
                        DRM_ERROR("failed to map buffer");
                        ret = -ENOMEM;