gpu: nvgpu: vgpu: call nvgpu_init_ltc_support

vgpu needs to call nvgpu_init_ltc_support to floor sweep and
set ltc_count.
And set gops.ltc.set_enabled to null as guest is not allowed to change
ltc settings.

Jira VQRM-2345

Change-Id: I83517d631aa947db4a0a4c312f0cecda9ba03973
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1703626
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/ltc.c b/drivers/gpu/nvgpu/common/ltc.c
index 024c2e49..dec4a80c 100644
--- a/drivers/gpu/nvgpu/common/ltc.c
+++ b/drivers/gpu/nvgpu/common/ltc.c
@@ -42,6 +42,9 @@ int nvgpu_init_ltc_support(struct gk20a *g)
 
 void nvgpu_ltc_sync_enabled(struct gk20a *g)
 {
+        if (!g->ops.ltc.set_enabled)
+                return;
+
         nvgpu_spinlock_acquire(&g->ltc_enabled_lock);
         if (g->mm.ltc_enabled_current != g->mm.ltc_enabled_target) {
                 g->ops.ltc.set_enabled(g, g->mm.ltc_enabled_target);