drm/amdgpu: add entity only when first job come

umd somtimes will create a context for every ring,
that means some entities wouldn't be used at all.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index 5ace1a74071f..8b2becd1aa07 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -47,6 +47,8 @@ static void amd_sched_rq_init(struct amd_sched_rq *rq)
 static void amd_sched_rq_add_entity(struct amd_sched_rq *rq,
                                     struct amd_sched_entity *entity)
 {
+        if (!list_empty(&entity->list))
+                return;
         spin_lock(&rq->lock);
         list_add_tail(&entity->list, &rq->entities);
         spin_unlock(&rq->lock);
@@ -55,6 +57,8 @@ static void amd_sched_rq_add_entity(struct amd_sched_rq *rq,
 static void amd_sched_rq_remove_entity(struct amd_sched_rq *rq,
                                        struct amd_sched_entity *entity)
 {
+        if (list_empty(&entity->list))
+                return;
         spin_lock(&rq->lock);
         list_del_init(&entity->list);
         if (rq->current_entity == entity)
@@ -138,9 +142,6 @@ int amd_sched_entity_init(struct amd_gpu_scheduler *sched,
         atomic_set(&entity->fence_seq, 0);
         entity->fence_context = fence_context_alloc(1);
 
-        /* Add the entity to the run queue */
-        amd_sched_rq_add_entity(rq, entity);
-
         return 0;
 }
 
@@ -302,9 +303,11 @@ static bool amd_sched_entity_in(struct amd_sched_job *sched_job)
         spin_unlock(&entity->queue_lock);
 
         /* first job wakes up scheduler */
-        if (first)
+        if (first) {
+                /* Add the entity to the run queue */
+                amd_sched_rq_add_entity(entity->rq, entity);
                 amd_sched_wakeup(sched);
-
+        }
         return added;
 }