3 files changed, 30 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index aa2dcf578dd6..719506808b4a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -717,6 +717,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev,
                      void *owner);
 int amdgpu_sync_rings(struct amdgpu_sync *sync,
                       struct amdgpu_ring *ring);
+struct fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync);
 int amdgpu_sync_wait(struct amdgpu_sync *sync);
 void amdgpu_sync_free(struct amdgpu_device *adev, struct amdgpu_sync *sync,
                       struct fence *fence);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
index f93fb3541488..de98fbd2971e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
@@ -27,6 +27,12 @@
 #include <drm/drmP.h>
 #include "amdgpu.h"
 
+static struct fence *amdgpu_sched_dependency(struct amd_sched_job *job)
+{
+        struct amdgpu_job *sched_job = (struct amdgpu_job *)job;
+        return amdgpu_sync_get_fence(&sched_job->ibs->sync);
+}
+
 static struct fence *amdgpu_sched_run_job(struct amd_sched_job *job)
 {
         struct amdgpu_job *sched_job;
@@ -75,6 +81,7 @@ static void amdgpu_sched_process_job(struct amd_sched_job *job)
 }
 
 struct amd_sched_backend_ops amdgpu_sched_ops = {
+        .dependency = amdgpu_sched_dependency,
         .run_job = amdgpu_sched_run_job,
         .process_job = amdgpu_sched_process_job
 };
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index 4fffb2539331..69b7d4540c6e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -202,6 +202,28 @@ int amdgpu_sync_resv(struct amdgpu_device *adev,
         return r;
 }
 
+struct fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
+{
+        struct amdgpu_sync_entry *e;
+        struct hlist_node *tmp;
+        struct fence *f;
+        int i;
+
+        hash_for_each_safe(sync->fences, i, tmp, e, node) {
+
+                f = e->fence;
+
+                hash_del(&e->node);
+                kfree(e);
+
+                if (!fence_is_signaled(f))
+                        return f;
+
+                fence_put(f);
+        }
+        return NULL;
+}
+
 int amdgpu_sync_wait(struct amdgpu_sync *sync)
 {
         struct amdgpu_sync_entry *e;