omap: add API to import bo's from dmabuf fd's

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

1 files changed, 32 insertions, 0 deletions

diff --git a/omap/omap_drm.c b/omap/omap_drm.c
index 464dea9c..1d37e451 100644
--- a/omap/omap_drm.c
+++ b/omap/omap_drm.c
@@ -218,6 +218,38 @@ fail:
         return NULL;
 }
 
+/* import a buffer from dmabuf fd, does not take ownership of the
+ * fd so caller should close() the fd when it is otherwise done
+ * with it (even if it is still using the 'struct omap_bo *')
+ */
+struct omap_bo * omap_bo_from_dmabuf(struct omap_device *dev, int fd)
+{
+        struct omap_bo *bo;
+        struct drm_prime_handle req = {
+                        .fd = fd,
+        };
+        int ret;
+
+        bo = calloc(sizeof(*bo), 1);
+        if (!bo) {
+                goto fail;
+        }
+
+        ret = drmIoctl(dev->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &req);
+        if (ret) {
+                goto fail;
+        }
+
+        bo->dev = dev;
+        bo->handle = req.handle;
+
+        return bo;
+
+fail:
+        free(bo);
+        return NULL;
+}
+
 /* destroy a buffer object */
 void omap_bo_del(struct omap_bo *bo)
 {