patches.fixes/0006-drm-add-mmap-function-to-prime-helpers.patch

From e1cc9ddba7d43e584a4f0a5cebf984c61d586235 Mon Sep 17 00:00:00 2001
From: Joonyoung Shim <jy0922.shim@samsung.com>
Date: Sun, 2 Feb 2014 10:14:56 +0900
Subject: drm: add mmap function to prime helpers

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

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 7c397cd97b8f46659698396b420bd48c3e6703e6)
Signed-off-by: Simon Horman <horms@verge.net.au>
---
 drivers/gpu/drm/drm_prime.c |    8 +++++++-
 include/drm/drmP.h          |    2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -155,7 +155,13 @@ static void drm_gem_dmabuf_kunmap(struct
 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 =  {
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -950,6 +950,8 @@ 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);