omap: add dmabuf support

Signed-off-by: Rob Clark <rob@ti.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/omap/omap_drm.c b/omap/omap_drm.c
index 96e18717..336da115 100644
--- a/omap/omap_drm.c
+++ b/omap/omap_drm.c
@@ -34,6 +34,7 @@
 #include <linux/stddef.h>
 #include <errno.h>
 #include <sys/mman.h>
+#include <fcntl.h>
 
 #include <xf86drm.h>
 
@@ -56,6 +57,7 @@ struct omap_bo {
 	uint32_t	handle;
 	uint32_t	name;		/* flink global handle (DRI2 name) */
 	uint64_t	offset;		/* offset to mmap() */
+	int		fd;		/* dmabuf handle */
 };
 
 struct omap_device * omap_device_new(int fd)
@@ -264,6 +266,25 @@ uint32_t omap_bo_handle(struct omap_bo *bo)
 	return bo->handle;
 }
 
+int omap_bo_dmabuf(struct omap_bo *bo)
+{
+	if (!bo->fd) {
+		struct drm_prime_handle req = {
+				.handle = bo->handle,
+				.flags = DRM_CLOEXEC,
+		};
+		int ret;
+
+		ret = drmIoctl(bo->dev->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &req);
+		if (ret) {
+			return ret;
+		}
+
+		bo->fd = req.fd;
+	}
+	return bo->fd;
+}
+
 uint32_t omap_bo_size(struct omap_bo *bo)
 {
 	if (!bo->size) {
diff --git a/omap/omap_drmif.h b/omap/omap_drmif.h
index eb75a80a..1e03eee1 100644
--- a/omap/omap_drmif.h
+++ b/omap/omap_drmif.h
@@ -53,6 +53,7 @@ struct omap_bo * omap_bo_from_name(struct omap_device *dev, uint32_t name);
 void omap_bo_del(struct omap_bo *bo);
 int omap_bo_get_name(struct omap_bo *bo, uint32_t *name);
 uint32_t omap_bo_handle(struct omap_bo *bo);
+int omap_bo_dmabuf(struct omap_bo *bo);
 uint32_t omap_bo_size(struct omap_bo *bo);
 void * omap_bo_map(struct omap_bo *bo);
 int omap_bo_cpu_prep(struct omap_bo *bo, enum omap_gem_op op);