[PATCH v2 1/3] drm: add mmap function to prime helpers

[Joonyoung Shim]

This adds to call low-level mmap() from prime helpers.

Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
---
 drivers/gpu/drm/drm_prime.c | 8 +++++++-
 include/drm/drmP.h          | 2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 52709f2..fb9b12d 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -244,7 +244,13 @@ static void drm_gem_dmabuf_kunmap(struct dma_buf *dma_buf,
 static int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf,
                struct vm_area_struct *vma)
 {
-       return -EINVAL;
+       struct drm_gem_object *obj = dma_buf->priv;
+       struct drm_device *dev = obj->dev;
+
+       if (!dev->driver->gem_prime_mmap)
+               return -ENOSYS;
+
+       return dev->driver->gem_prime_mmap(obj, vma);
 }

 static const struct dma_buf_ops drm_gem_prime_dmabuf_ops =  {
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 82670ac..12083dc 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -937,6 +937,8 @@ struct drm_driver {
                                struct sg_table *sgt);
        void *(*gem_prime_vmap)(struct drm_gem_object *obj);
        void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
+       int (*gem_prime_mmap)(struct drm_gem_object *obj,
+                               struct vm_area_struct *vma);

        /* vga arb irq handler */
        void (*vgaarb_irq)(struct drm_device *dev, bool state);
-- 
1.8.1.2