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drm: introduce a capability flag for syncobj timeline support

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Unfortunately userspace users of this API cannot be publicly disclosed
yet.

This commit effectively disables timeline syncobj ioctls for all
drivers. Each driver wishing to support this feature will need to
expose DRIVER_SYNCOBJ_TIMELINE.

v2: Add uAPI capability check (Christian)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com> (v1)
Cc: Dave Airlie <airlied@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Christian König <christian.koenig@amd.com>
Cc: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190416125750.31370-1-lionel.g.landwerlin@intel.com
This commit is contained in:
Lionel Landwerlin
2019-04-16 13:57:50 +01:00
committed by Dave Airlie
parent 5ec776383d
commit 060cebb20c
4 changed files with 16 additions and 5 deletions
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3
drivers/gpu/drm/drm_ioctl.c
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@@ -245,6 +245,9 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_
case DRM_CAP_SYNCOBJ:
req->value = drm_core_check_feature(dev, DRIVER_SYNCOBJ);
return 0;
case DRM_CAP_SYNCOBJ_TIMELINE:
req->value = drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE);
return 0;
}
/* Other caps only work with KMS drivers */