[PATCH 08/18] drm/amdgpu: add dma-fence annotations to atomic commit path

Daniel Vetter
2020-06-04T08:13:50Z

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 bdba0bfd6df1..adabfa929f42 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>
@@ -7320,6 +7321,9 @@ 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);

@@ -7600,6 +7604,8 @@ 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);

--
2.26.2