Makes the handling a bit more complex, but avoids the use of dma_resv_get_excl_unlocked().
v2: add missing rcu_read_lock()/unlock()
Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/drm_gem_atomic_helper.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c index e570398abd78..86df75b2f8eb 100644 --- a/drivers/gpu/drm/drm_gem_atomic_helper.c +++ b/drivers/gpu/drm/drm_gem_atomic_helper.c @@ -143,6 +143,7 @@ */ int drm_gem_plane_helper_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state) { + struct dma_resv_iter cursor; struct drm_gem_object *obj; struct dma_fence *fence;
@@ -150,9 +151,16 @@ int drm_gem_plane_helper_prepare_fb(struct drm_plane *plane, struct drm_plane_st return 0;
obj = drm_gem_fb_get_obj(state->fb, 0); - fence = dma_resv_get_excl_unlocked(obj->resv); - drm_atomic_set_fence_for_plane(state, fence); + rcu_read_lock(); + dma_resv_for_each_fence_unlocked(obj->resv, &cursor, false, fence) { + rcu_read_unlock(); + /* TODO: We only use the first write fence here */ + drm_atomic_set_fence_for_plane(state, fence); + return 0; + } + rcu_read_unlock();
+ drm_atomic_set_fence_for_plane(state, NULL); return 0; } EXPORT_SYMBOL_GPL(drm_gem_plane_helper_prepare_fb);