/* Overlay window manipulation */
static int tegra_overlay_pin_window(struct tegra_overlay_info *overlay,
struct tegra_overlay_flip_win *flip_win,
struct nvmap_client *user_nvmap)
{
struct nvmap_handle_ref *win_dupe;
struct nvmap_handle *win_handle;
unsigned long buff_id = flip_win->attr.buff_id;
if (!buff_id)
return 0;
win_handle = nvmap_get_handle_id(user_nvmap, buff_id);
if (win_handle == NULL) {
dev_err(&overlay->ndev->dev, "%s: flip invalid "
"handle %08lx\n", current->comm, buff_id);
return -EPERM;
}
/* duplicate the new framebuffer's handle into the fb driver's
* nvmap context, to ensure that the handle won't be freed as
* long as it is in-use by the fb driver */
win_dupe = nvmap_duplicate_handle_id(overlay->overlay_nvmap, buff_id);
nvmap_handle_put(win_handle);
if (IS_ERR(win_dupe)) {
dev_err(&overlay->ndev->dev, "couldn't duplicate handle\n");
return PTR_ERR(win_dupe);
}
flip_win->handle = win_dupe;
flip_win->phys_addr = nvmap_pin(overlay->overlay_nvmap, win_dupe);
if (IS_ERR((void *)flip_win->phys_addr)) {
dev_err(&overlay->ndev->dev, "couldn't pin handle\n");
nvmap_free(overlay->overlay_nvmap, win_dupe);
return PTR_ERR((void *)flip_win->phys_addr);
}
return 0;
}
struct mem_handle *nvhost_nvmap_get(struct mem_mgr *mgr,
u32 id, struct nvhost_device *dev)
{
return (struct mem_handle *)
nvmap_duplicate_handle_id((struct nvmap_client *)mgr, id);
}
