I need a canary in a ttm-based atomic driver to make sure the dma_fence_begin/end_signalling annotations actually work.

Cc: linux-media@vger.kernel.org Cc: linaro-mm-sig@lists.linaro.org Cc: linux-rdma@vger.kernel.org Cc: amd-gfx@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org Cc: Chris Wilson chris@chris-wilson.co.uk Cc: Maarten Lankhorst maarten.lankhorst@linux.intel.com Cc: Christian König christian.koenig@amd.com Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 5b0f708dd8c5..6afcc33ff846 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -57,6 +57,7 @@

#include "ivsrcid/ivsrcid_vislands30.h"

+#include <linux/module.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/version.h> @@ -7359,6 +7360,9 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state) struct drm_connector_state *old_con_state, *new_con_state; struct dm_crtc_state *dm_old_crtc_state, *dm_new_crtc_state; int crtc_disable_count = 0; + bool fence_cookie; + + fence_cookie = dma_fence_begin_signalling();

drm_atomic_helper_update_legacy_modeset_state(dev, state);

@@ -7639,6 +7643,8 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state) /* Signal HW programming completion */ drm_atomic_helper_commit_hw_done(state);

+ dma_fence_end_signalling(fence_cookie); + if (wait_for_vblank) drm_atomic_helper_wait_for_flip_done(dev, state);