gpu: nvgpu: gp10b: Lazy sync point update

Update sync point protection field only when we have a valid sync
point id, and the new id is different from old id.

Bug 1653328

Change-Id: Ie07e26f8abd7c8239ad562603b62fda00164cbc7
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/757102
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/hw_pbdma_gp10b.h b/drivers/gpu/nvgpu/gp10b/hw_pbdma_gp10b.h
index 18db8595..977a8ee2 100644
--- a/drivers/gpu/nvgpu/gp10b/hw_pbdma_gp10b.h
+++ b/drivers/gpu/nvgpu/gp10b/hw_pbdma_gp10b.h
@@ -454,6 +454,10 @@ static inline u32 pbdma_allowed_syncpoints_0_index_f(u32 v)
 {
         return (v & 0x7fff) << 16;
 }
+static inline u32 pbdma_allowed_syncpoints_0_index_v(u32 r)
+{
+        return (r >> 16) & 0x7fff;
+}
 static inline u32 pbdma_allowed_syncpoints_1_valid_f(u32 v)
 {
         return (v & 0x1) << 15;