drm/exynos: set buffer type from exporter.

when fd is imported to gem, whether the memory type from exporter
is contigous or not should be set to gem flag so that drm-based
driver can aware of the memory type.

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

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
index 1687b72def529c018aaba3137c0454be61c43f9f..613bf8a5d9b268331779b0f60f43f52a047269de 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
@@ -25,6 +25,7 @@
 
 #include "drmP.h"
 #include "drm.h"
+#include "exynos_drm.h"
 #include "exynos_drm_drv.h"
 #include "exynos_drm_gem.h"
 
@@ -190,7 +191,7 @@ struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev,
        struct exynos_drm_gem_obj *exynos_gem_obj;
        struct exynos_drm_gem_buf *buffer;
        struct page *page;
-       int ret, i = 0;
+       int ret;
 
        DRM_DEBUG_PRIME("%s\n", __FILE__);
 
@@ -240,13 +241,25 @@ struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev,
        }
 
        sgl = sgt->sgl;
-       buffer->dma_addr = sg_dma_address(sgl);
 
-       while (i < sgt->nents) {
-               buffer->pages[i] = sg_page(sgl);
-               buffer->size += sg_dma_len(sgl);
-               sgl = sg_next(sgl);
-               i++;
+       if (sgt->nents == 1) {
+               buffer->dma_addr = sg_dma_address(sgt->sgl);
+               buffer->size = sg_dma_len(sgt->sgl);
+
+               /* always physically continuous memory if sgt->nents is 1. */
+               exynos_gem_obj->flags |= EXYNOS_BO_CONTIG;
+       } else {
+               unsigned int i = 0;
+
+               buffer->dma_addr = sg_dma_address(sgl);
+               while (i < sgt->nents) {
+                       buffer->pages[i] = sg_page(sgl);
+                       buffer->size += sg_dma_len(sgl);
+                       sgl = sg_next(sgl);
+                       i++;
+               }
+
+               exynos_gem_obj->flags |= EXYNOS_BO_NONCONTIG;
        }
 
        exynos_gem_obj->buffer = buffer;