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drm/syncobj: Add a CREATE_SIGNALED flag

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This requests that the driver create the sync object such that it
already has a signaled dma_fence attached.  Because we don't need
anything in particular (just something signaled), we use a dummy null
fence.  This is useful for Vulkan which has a similar flag that can be
passed to vkCreateFence.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jason Ekstrand
2017-08-25 10:52:25 -07:00
committed by Dave Airlie
parent 9c19fb10a5
commit 1fc08218ed
2 changed files with 55 additions and 3 deletions
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1
include/uapi/drm/drm.h
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@@ -700,6 +700,7 @@ struct drm_prime_handle {
struct drm_syncobj_create {
__u32 handle;
#define DRM_SYNCOBJ_CREATE_SIGNALED (1 << 0)
__u32 flags;
};