gpu: nvgpu: PG refcount check moved to a wrapper function.

Moved PG refcount checking to a wrapper function, this
function manages the refcount and decides whether to call
dbg_set_powergate function.

Instead of checking the dbg_s->is_pg_disabled variable,
code is checking g->dbg_powergating_disabled_refcount
variable to know if powergate is disabled or not.
Updating hwpm ctxsw mode without disabling powergate
will result in priv errors.

Bug 200410871
Bug 2109765

Change-Id: I33c9022cb04cd39249c78e72584dfe6afb7212d0
Signed-off-by: Vinod G <vinodg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1753550
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.h b/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.h
index b714a648..d9d07844 100644
--- a/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.h
@@ -133,4 +133,6 @@ int gk20a_perfbuf_enable_locked(struct gk20a *g, u64 offset, u32 size);
 int gk20a_perfbuf_disable_locked(struct gk20a *g);
 
 void nvgpu_dbg_session_post_event(struct dbg_session_gk20a *dbg_s);
+u32 nvgpu_set_powergate_locked(struct dbg_session_gk20a *dbg_s,
+                                bool mode);
 #endif /* DBG_GPU_GK20A_H */