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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 /drivers/gpu/drm/drm_ioctl.c | |
| 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 'drivers/gpu/drm/drm_ioctl.c')
| -rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 7c9d66ee917d..8e9afe7af19c 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -245,8 +245,7 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_ req->value = 1; return 0; case DRM_CAP_PRIME: - req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; - req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; + req->value = DRM_PRIME_CAP_IMPORT | DRM_PRIME_CAP_EXPORT; return 0; case DRM_CAP_SYNCOBJ: req->value = drm_core_check_feature(dev, DRIVER_SYNCOBJ); |