We don't populate drm_driver.gem_prime_import_sg_table so only DMA-BUFs exported from our own device can be imported. We don't populate drm_gem_object_funcs.get_sg_table so DMA-BUFs cannot be imported into another device. Still, this is useful to user-space to share buffers between processes and between API boundaries (e.g. wlroots hard-requires PRIME import/export support). v2: expand commit message Signed-off-by: Simon Ser <contact@xxxxxxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Cc: Thomas Zimmermann <tzimmermann@xxxxxxx> Cc: Tian Tao <tiantao6@xxxxxxxxxxxxx> Cc: Maxime Ripard <maxime@xxxxxxxxxx> Cc: Christian König <christian.koenig@xxxxxxx> Cc: Hans de Goede <hdegoede@xxxxxxxxxx> --- include/drm/drm_gem_vram_helper.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h index d3e8920c0b64..f4aab64411d8 100644 --- a/include/drm/drm_gem_vram_helper.h +++ b/include/drm/drm_gem_vram_helper.h @@ -160,7 +160,9 @@ void drm_gem_vram_simple_display_pipe_cleanup_fb( .debugfs_init = drm_vram_mm_debugfs_init, \ .dumb_create = drm_gem_vram_driver_dumb_create, \ .dumb_map_offset = drm_gem_ttm_dumb_map_offset, \ - .gem_prime_mmap = drm_gem_prime_mmap + .gem_prime_mmap = drm_gem_prime_mmap, \ + .prime_handle_to_fd = drm_gem_prime_handle_to_fd, \ + .prime_fd_to_handle = drm_gem_prime_fd_to_handle /* * VRAM memory manager -- 2.39.2
