This is a bit disappointing since we need to split the annotations over all the different parts.

I was considering just leaking the critical section into the ->atomic_commit_tail callback of each driver. But that would mean we need to pass the fence_cookie into each driver (there's a total of 13 implementations of this hook right now), so bad flag day. And also a bit leaky abstraction.

Hence just do it function-by-function.

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/drm_atomic_helper.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 4a66768b6057..69121d2925bd 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1567,6 +1567,7 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done); void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) { struct drm_device *dev = old_state->dev; + bool fence_cookie = dma_fence_begin_signalling();

drm_atomic_helper_commit_modeset_disables(dev, old_state);

@@ -1578,6 +1579,8 @@ void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state)

drm_atomic_helper_commit_hw_done(old_state);

+ dma_fence_end_signalling(fence_cookie); + drm_atomic_helper_wait_for_vblanks(dev, old_state);

drm_atomic_helper_cleanup_planes(dev, old_state); @@ -1597,6 +1600,7 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_tail); void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) { struct drm_device *dev = old_state->dev; + bool fence_cookie = dma_fence_begin_signalling();

drm_atomic_helper_commit_modeset_disables(dev, old_state);

@@ -1609,6 +1613,8 @@ void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state)

drm_atomic_helper_commit_hw_done(old_state);

+ dma_fence_end_signalling(fence_cookie); + drm_atomic_helper_wait_for_vblanks(dev, old_state);

drm_atomic_helper_cleanup_planes(dev, old_state); @@ -1624,6 +1630,9 @@ static void commit_tail(struct drm_atomic_state *old_state) ktime_t start; s64 commit_time_ms; unsigned int i, new_self_refresh_mask = 0; + bool fence_cookie; + + fence_cookie = dma_fence_begin_signalling();

funcs = dev->mode_config.helper_private;

@@ -1652,6 +1661,8 @@ static void commit_tail(struct drm_atomic_state *old_state) if (new_crtc_state->self_refresh_active) new_self_refresh_mask |= BIT(i);

+ dma_fence_end_signalling(fence_cookie); + if (funcs && funcs->atomic_commit_tail) funcs->atomic_commit_tail(old_state); else @@ -1810,6 +1821,7 @@ int drm_atomic_helper_commit(struct drm_device *dev, bool nonblock) { int ret; + bool fence_cookie;

if (state->async_update) { ret = drm_atomic_helper_prepare_planes(dev, state); @@ -1832,6 +1844,8 @@ int drm_atomic_helper_commit(struct drm_device *dev, if (ret) return ret;

+ fence_cookie = dma_fence_begin_signalling(); + if (!nonblock) { ret = drm_atomic_helper_wait_for_fences(dev, state, true); if (ret) @@ -1869,6 +1883,7 @@ int drm_atomic_helper_commit(struct drm_device *dev, */

drm_atomic_state_get(state); + dma_fence_end_signalling(fence_cookie); if (nonblock) queue_work(system_unbound_wq, &state->commit_work); else @@ -1877,6 +1892,7 @@ int drm_atomic_helper_commit(struct drm_device *dev, return 0;

err: + dma_fence_end_signalling(fence_cookie); drm_atomic_helper_cleanup_planes(dev, state); return ret; }