gpu: nvgpu: Make LTC disabling common code

Refactor the sync_debugfs LTC HAL op so that the logic to enable
or disable LTC goes to common code nvgpu_ltc_sync_enabled() and
the LTC HAL set_enabled only performs the hardware register access.

Create a new common function nvgpu_init_ltc_support() to initialize
the LTC software variable, and move hardware initialization of LTC to
be called from it.

JIRA NVGPU-62

Change-Id: Ib1cf4f5b83ca3dac08407464ed56a732e0a33923
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1528262
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 6350bcf5..7d577cda 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -26,6 +26,7 @@
 #include <nvgpu/enabled.h>
 #include <nvgpu/pmu.h>
 #include <nvgpu/gmmu.h>
+#include <nvgpu/ltc.h>
 
 #include <trace/events/gk20a.h>
 
@@ -216,8 +217,11 @@ int gk20a_finalize_poweron(struct gk20a *g)
                 goto done;
         }
 
-        if (g->ops.ltc.init_fs_state)
-                g->ops.ltc.init_fs_state(g);
+        err = nvgpu_init_ltc_support(g);
+        if (err) {
+                nvgpu_err(g, "failed to init ltc");
+                goto done;
+        }
 
         err = gk20a_init_mm_support(g);
         if (err) {