gpu: nvgpu: remove fence dependency tracking

In preparation for better abstraction in job synchronization, drop
support for the dependency fences tracked via submit pre-fences in
semaphore-based syncs. This has only worked for semaphores, not nvhost
syncpoints, and hasn't really been used. The dependency was printed in
the sync framework's sync pt value string.

Remove also the userspace-visible gk20a_sync_pt_info which is not used
and depends on this feature (providing a duration since the dependency
fence's timestamp).

Jira NVGPU-43

Change-Id: Ia2b26502a9dc8f5bef5470f94b1475001f621da1
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1456880
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
index 63da0959..a5aeae08 100644
--- a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
@@ -233,7 +233,6 @@ int gk20a_fence_from_semaphore(
                 struct sync_timeline *timeline,
                 struct nvgpu_semaphore *semaphore,
                 wait_queue_head_t *semaphore_wq,
-                struct sync_fence *dependency,
                 bool wfi, bool need_sync_fence)
 {
         struct gk20a_fence *f = fence_out;
@@ -242,7 +241,7 @@ int gk20a_fence_from_semaphore(
 #ifdef CONFIG_SYNC
         if (need_sync_fence) {
                 sync_fence = gk20a_sync_fence_create(g, timeline, semaphore,
-                                        dependency, "f-gk20a-0x%04x",
+                                        "f-gk20a-0x%04x",
                                         nvgpu_semaphore_gpu_ro_va(semaphore));
                 if (!sync_fence)
                         return -1;