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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-06-20 10:59:57 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-06-26 12:08:39 +0300 |
| commit | 6b85aa68d9d5a27556b8b1015e7e515a371e77de (patch) | |
| tree | 0facd4c6d44ede17d4ca655cae2e610cf5163448 /include/drm | |
| parent | aa656d48e871a1b062e1bbf9474d8b831c35074c (diff) | |
| download | linux-6b85aa68d9d5a27556b8b1015e7e515a371e77de.tar.xz | |
drm: Enable PRIME import/export for all drivers
Call drm_gem_prime_handle_to_fd() and drm_gem_prime_fd_to_handle() by
default if no PRIME import/export helpers have been set. Both functions
are the default for almost all drivers.
DRM drivers implement struct drm_driver.gem_prime_import_sg_table
to import dma-buf objects from other drivers. Having the function
drm_gem_prime_fd_to_handle() functions set by default allows each
driver to import dma-buf objects to itself, even without support for
other drivers.
For drm_gem_prime_handle_to_fd() it is similar: using it by default
allows each driver to export to itself, even without support for other
drivers.
This functionality enables userspace to share per-driver buffers
across process boundaries via PRIME (e.g., wlroots requires this
functionality). The patch generalizes a pattern that has previously
been implemented by GEM VRAM helpers [1] to work with any driver.
For example, gma500 can now run the wlroots-based sway compositor.
v2:
* clean up docs and TODO comments (Simon, Zack)
* clean up style in drm_getcap()
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/dri-devel/20230302143502.500661-1-contact@emersion.fr/ # 1
Reviewed-by: Simon Ser <contact@emersion.fr>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230620080252.16368-2-tzimmermann@suse.de
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_drv.h | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index 870278ecd8ba..b77f2c7275b7 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -304,22 +304,14 @@ struct drm_driver { /** * @prime_handle_to_fd: * - * Main PRIME export function. Should be implemented with - * drm_gem_prime_handle_to_fd() for GEM based drivers. - * - * For an in-depth discussion see :ref:`PRIME buffer sharing - * documentation <prime_buffer_sharing>`. + * PRIME export function. Only used by vmwgfx. */ int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv, uint32_t handle, uint32_t flags, int *prime_fd); /** * @prime_fd_to_handle: * - * Main PRIME import function. Should be implemented with - * drm_gem_prime_fd_to_handle() for GEM based drivers. - * - * For an in-depth discussion see :ref:`PRIME buffer sharing - * documentation <prime_buffer_sharing>`. + * PRIME import function. Only used by vmwgfx. */ int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv, int prime_fd, uint32_t *handle); |