[PATCH 4/9] drm/i915: Push i915_sw_fence_wait into the nonblocking atomic commit

[Daniel Vetter]

Blocking in a worker is ok, that's what the unbound_wq is for. And it
unifies the paths between the blocking and nonblocking commit, giving
me just one path where I have to implement the deadlock avoidance
trickery in the next patch.

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 010a1f3e000c..5aa7ca1ab592 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12397,6 +12397,8 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 	unsigned crtc_vblank_mask = 0;
 	int i;
 
+	i915_sw_fence_wait(&intel_state->commit_ready);
+
 	drm_atomic_helper_wait_for_dependencies(state);
 
 	if (intel_state->modeset)
@@ -12564,10 +12566,7 @@ intel_atomic_commit_ready(struct i915_sw_fence *fence,
 
 	switch (notify) {
 	case FENCE_COMPLETE:
-		if (state->base.commit_work.func)
-			queue_work(system_unbound_wq, &state->base.commit_work);
 		break;
-
 	case FENCE_FREE:
 		{
 			struct intel_atomic_helper *helper =
@@ -12671,14 +12670,14 @@ static int intel_atomic_commit(struct drm_device *dev,
 	}
 
 	drm_atomic_state_get(state);
-	INIT_WORK(&state->commit_work,
-		  nonblock ? intel_atomic_commit_work : NULL);
+	INIT_WORK(&state->commit_work, intel_atomic_commit_work);
 
 	i915_sw_fence_commit(&intel_state->commit_ready);
-	if (!nonblock) {
-		i915_sw_fence_wait(&intel_state->commit_ready);
+	if (nonblock)
+		queue_work(system_unbound_wq, &state->commit_work);
+	else
 		intel_atomic_commit_tail(state);
-	}
+
 
 	return 0;
 }
-- 
2.13.2