gpu: nvgpu: pmu: add check before enabling elpg.

Do not enable/disable elpg if platform->can_elpg is false.

Bug 1870556

Change-Id: I82d1fc4efdccc518827a6150fd3c17f6112e2f4a
Signed-off-by: Deepak Goyal <dgoyal@nvidia.com>
Reviewed-on: http://git-master/r/1465816
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/lpwr/lpwr.c b/drivers/gpu/nvgpu/lpwr/lpwr.c
index 1f15d512..8fa92b62 100644
--- a/drivers/gpu/nvgpu/lpwr/lpwr.c
+++ b/drivers/gpu/nvgpu/lpwr/lpwr.c
@@ -337,6 +337,7 @@ u32 nvgpu_lpwr_is_rppg_supported(struct gk20a *g, u32 pstate_num)
 int nvgpu_lpwr_enable_pg(struct gk20a *g, bool pstate_lock)
 {
         struct pmu_gk20a *pmu = &g->pmu;
+        struct gk20a_platform *platform = dev_get_drvdata(g->dev);
         u32  status = 0;
         u32 is_mscg_supported = 0;
         u32 is_rppg_supported = 0;
@@ -363,7 +364,7 @@ int nvgpu_lpwr_enable_pg(struct gk20a *g, bool pstate_lock)
         is_rppg_supported = nvgpu_lpwr_is_rppg_supported(g,
                         present_pstate);
         if (is_rppg_supported) {
-                if (g->support_pmu && g->elpg_enabled)
+                if (g->support_pmu && platform->can_elpg)
                         status = gk20a_pmu_enable_elpg(g);
         }