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, 3 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c b/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
index 26ce66f1..af22b13f 100644
--- a/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/pmu_gk20a.c
@@ -4936,6 +4936,7 @@ clean_up:
 int gk20a_pmu_pg_global_enable(struct gk20a *g, u32 enable_pg)
 {
         u32 status = 0;
+        struct gk20a_platform *platform = dev_get_drvdata(g->dev);
 
         if (enable_pg == true) {
                 if (g->ops.pmu.pmu_pg_engines_feature_list &&
@@ -4945,7 +4946,7 @@ int gk20a_pmu_pg_global_enable(struct gk20a *g, u32 enable_pg)
                         if (g->ops.pmu.pmu_lpwr_enable_pg)
                                 status = g->ops.pmu.pmu_lpwr_enable_pg(g,
                                                 true);
-                } else if (g->support_pmu)
+                } else if (g->support_pmu && platform->can_elpg)
                         status = gk20a_pmu_enable_elpg(g);
         } else if (enable_pg == false) {
                 if (g->ops.pmu.pmu_pg_engines_feature_list &&
@@ -4955,7 +4956,7 @@ int gk20a_pmu_pg_global_enable(struct gk20a *g, u32 enable_pg)
                         if (g->ops.pmu.pmu_lpwr_disable_pg)
                                 status = g->ops.pmu.pmu_lpwr_disable_pg(g,
                                                 true);
-                } else if (g->support_pmu)
+                } else if (g->support_pmu && platform->can_elpg)
                         status = gk20a_pmu_disable_elpg(g);
         }