[PATCH 02/11] drm/panfrost: Remove sched_lock

[Daniel Vetter <daniel.vetter@ffwll.ch>]

Scheduler takes care of its own locking, dont worry. For everything else
there's reservation locking on each bo.

So seems to be entirely redundnant and just a bit in the way.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
---
 drivers/gpu/drm/panfrost/panfrost_device.c |  1 -
 drivers/gpu/drm/panfrost/panfrost_device.h |  2 --
 drivers/gpu/drm/panfrost/panfrost_job.c    | 13 ++-----------
 3 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
index 125ed973feaa..23070c01c63f 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.c
+++ b/drivers/gpu/drm/panfrost/panfrost_device.c
@@ -199,7 +199,6 @@ int panfrost_device_init(struct panfrost_device *pfdev)
 	int err;
 	struct resource *res;
 
-	mutex_init(&pfdev->sched_lock);
 	INIT_LIST_HEAD(&pfdev->scheduled_jobs);
 	INIT_LIST_HEAD(&pfdev->as_lru_list);
 
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index 597cf1459b0a..7519903bb031 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -105,8 +105,6 @@ struct panfrost_device {
 
 	struct panfrost_perfcnt *perfcnt;
 
-	struct mutex sched_lock;
-
 	struct {
 		struct work_struct work;
 		atomic_t pending;
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index 6003cfeb1322..f5d39ee14ab5 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -218,26 +218,19 @@ static void panfrost_attach_object_fences(struct drm_gem_object **bos,
 
 int panfrost_job_push(struct panfrost_job *job)
 {
-	struct panfrost_device *pfdev = job->pfdev;
 	int slot = panfrost_job_get_slot(job);
 	struct drm_sched_entity *entity = &job->file_priv->sched_entity[slot];
 	struct ww_acquire_ctx acquire_ctx;
 	int ret = 0;
 
-	mutex_lock(&pfdev->sched_lock);
-
 	ret = drm_gem_lock_reservations(job->bos, job->bo_count,
 					    &acquire_ctx);
-	if (ret) {
-		mutex_unlock(&pfdev->sched_lock);
+	if (ret)
 		return ret;
-	}
 
 	ret = drm_sched_job_init(&job->base, entity, NULL);
-	if (ret) {
-		mutex_unlock(&pfdev->sched_lock);
+	if (ret)
 		goto unlock;
-	}
 
 	job->render_done_fence = dma_fence_get(&job->base.s_fence->finished);
 
@@ -248,8 +241,6 @@ int panfrost_job_push(struct panfrost_job *job)
 
 	drm_sched_entity_push_job(&job->base, entity);
 
-	mutex_unlock(&pfdev->sched_lock);
-
 	panfrost_attach_object_fences(job->bos, job->bo_count,
 				      job->render_done_fence);
 
-- 
2.31.0