[PATCH 0/3] drm: Allow PRIME 'self-import' for all drivers

[Thomas Zimmermann]

Set drm_gem_prime_handle_to_fd() and drm_gem_prime_fd_to_handle()
for all DRM drivers. Even drivers that do not support PRIME import
or export of dma-bufs can now import their own buffer objects. This
is required by some userspace, such as wlroots-based compositors, to
share buffers among processes.

The only driver that does not use the drm_gem_prime_*() helpers is
vmwgfx. Once it has been converted, the callbacks in struct drm_driver
can be removed.

Simon Ser implemented the feature for drivers based on GEM VRAM helpers
in [1]. This patchset generalizes the code for all drivers that do not
otherwise support PRIME. Tested by running sway with gma500 hardware.

[1] https://lore.kernel.org/dri-devel/20230302143502.500661-1-contact@emersion.fr/

Thomas Zimmermann (3):
  drm: Enable PRIME import/export for all drivers
  drm: Clear fd/handle callbacks in struct drm_driver
  drm/prime: Unexport helpers for fd/handle conversion

 Documentation/gpu/todo.rst                    | 14 +++++
 drivers/accel/ivpu/ivpu_drv.c                 |  2 -
 drivers/accel/qaic/qaic_drv.c                 |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c       |  2 -
 drivers/gpu/drm/armada/armada_drv.c           |  2 -
 drivers/gpu/drm/drm_ioctl.c                   |  4 +-
 drivers/gpu/drm/drm_prime.c                   | 62 ++++++++++---------
 drivers/gpu/drm/etnaviv/etnaviv_drv.c         |  2 -
 drivers/gpu/drm/exynos/exynos_drm_drv.c       |  2 -
 drivers/gpu/drm/i915/i915_driver.c            |  2 -
 drivers/gpu/drm/lima/lima_drv.c               |  2 -
 drivers/gpu/drm/mediatek/mtk_drm_drv.c        |  2 -
 drivers/gpu/drm/msm/msm_drv.c                 |  2 -
 drivers/gpu/drm/nouveau/nouveau_drm.c         |  2 -
 drivers/gpu/drm/omapdrm/omap_drv.c            |  2 -
 drivers/gpu/drm/panfrost/panfrost_drv.c       |  2 -
 drivers/gpu/drm/pl111/pl111_drv.c             |  2 -
 drivers/gpu/drm/qxl/qxl_drv.c                 |  2 -
 drivers/gpu/drm/radeon/radeon_drv.c           |  2 -
 drivers/gpu/drm/renesas/rcar-du/rcar_du_drv.c |  2 -
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c   |  2 -
 drivers/gpu/drm/tegra/drm.c                   |  2 -
 drivers/gpu/drm/v3d/v3d_drv.c                 |  2 -
 drivers/gpu/drm/virtio/virtgpu_drv.c          |  2 -
 drivers/gpu/drm/xen/xen_drm_front.c           |  2 -
 include/drm/drm_drv.h                         |  6 ++
 include/drm/drm_gem_dma_helper.h              | 12 ++--
 include/drm/drm_gem_shmem_helper.h            |  6 +-
 include/drm/drm_gem_vram_helper.h             |  4 +-
 include/drm/drm_prime.h                       |  7 ---
 30 files changed, 62 insertions(+), 96 deletions(-)

-- 
2.41.0