drm/exynos: added drm prime feature.

this patch adds exynos specific codes for DRM Prime feature.
with this patch, user application can get file descriptor
from gem handle through DRM_IOCTL_PRIME_HANDLE_TO_FD ioctl
command(export) and also gem handle from file descriptor
through DRM_IOCTL_PRIME_FD_TO_HANLDE(import) ioctl command.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_buf.c b/drivers/gpu/drm/exynos/exynos_drm_buf.c
index de8d2090bce3..b3cb0a69fbf2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_buf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_buf.c
@@ -35,7 +35,7 @@ static int lowlevel_buffer_allocate(struct drm_device *dev,
                 unsigned int flags, struct exynos_drm_gem_buf *buf)
 {
         dma_addr_t start_addr;
-        unsigned int npages, page_size, i = 0;
+        unsigned int npages, i = 0;
         struct scatterlist *sgl;
         int ret = 0;
 
@@ -53,13 +53,13 @@ static int lowlevel_buffer_allocate(struct drm_device *dev,
 
         if (buf->size >= SZ_1M) {
                 npages = buf->size >> SECTION_SHIFT;
-                page_size = SECTION_SIZE;
+                buf->page_size = SECTION_SIZE;
         } else if (buf->size >= SZ_64K) {
                 npages = buf->size >> 16;
-                page_size = SZ_64K;
+                buf->page_size = SZ_64K;
         } else {
                 npages = buf->size >> PAGE_SHIFT;
-                page_size = PAGE_SIZE;
+                buf->page_size = PAGE_SIZE;
         }
 
         buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
@@ -96,9 +96,9 @@ static int lowlevel_buffer_allocate(struct drm_device *dev,
 
         while (i < npages) {
                 buf->pages[i] = phys_to_page(start_addr);
-                sg_set_page(sgl, buf->pages[i], page_size, 0);
+                sg_set_page(sgl, buf->pages[i], buf->page_size, 0);
                 sg_dma_address(sgl) = start_addr;
-                start_addr += page_size;
+                start_addr += buf->page_size;
                 sgl = sg_next(sgl);
                 i++;
         }