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 <e...@anholt.net>
---
drivers/gpu/drm/vc4/vc4_plane.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index fa6809d8b0fe..8853e9a4f005 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -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)
--
2.11.0
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