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drm/vc4: Hook up plane prepare_fb to lookup dma-buf reservations. 

This way drm_atomic_helper_wait_for_fences() will actually do
something.  The vc4_seqno_cb has been doing the fence waits on V3D
manually, so far.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/20170621185002.28563-1-eric@anholt.net
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Eric Anholt 2017-06-21 11:49:59 -07:00
parent 7d2818f54e
commit 334dbd69c6
1 changed files with 17 additions and 0 deletions
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17
drivers/gpu/drm/vc4/vc4_plane.c
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@ -759,9 +759,26 @@ void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
vc4_state->dlist[vc4_state->ptr0_offset] = addr;
}
static int vc4_prepare_fb(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_bo *bo;
struct dma_fence *fence;
if ((plane->state->fb == state->fb) || !state->fb)
return 0;
bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
fence = reservation_object_get_excl_rcu(bo->resv);
drm_atomic_set_fence_for_plane(state, fence);
return 0;
}
static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
.atomic_check = vc4_plane_atomic_check,
.atomic_update = vc4_plane_atomic_update,
.prepare_fb = vc4_prepare_fb,
};
static void vc4_plane_destroy(struct drm_plane *plane)