gpu:nvgpu: Add option for split rail support

Add gops to check whether split rail is suported in the chip

Bug 200399373

Change-Id: I5e955127e06d1fbc9b3eca0a895afa0a06f39d91
Signed-off-by: Vaikundanathan S <vaikuns@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1702130
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

4 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/clk/clk_domain.c b/drivers/gpu/nvgpu/clk/clk_domain.c
index f306cf56..822bba2c 100644
--- a/drivers/gpu/nvgpu/clk/clk_domain.c
+++ b/drivers/gpu/nvgpu/clk/clk_domain.c
@@ -131,7 +131,10 @@ static u32 _clk_domains_pmudatainit_3x(struct gk20a *g,
         pset->b_debug_mode = false;
         pset->b_enforce_vf_monotonicity = pdomains->b_enforce_vf_monotonicity;
         pset->b_enforce_vf_smoothening = pdomains->b_enforce_vf_smoothening;
-        pset->volt_rails_max = 2;
+        if (g->ops.clk.split_rail_support)
+                pset->volt_rails_max = 2;
+        else
+                pset->volt_rails_max = 1;
         status = boardobjgrpmask_export(
                                 &pdomains->master_domains_mask.super,
                                 pdomains->master_domains_mask.super.bitcount,
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index e29d7b07..38952daf 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -1032,6 +1032,7 @@ struct gpu_ops {
                 int (*mclk_init)(struct gk20a *g);
                 void (*mclk_deinit)(struct gk20a *g);
                 int (*mclk_change)(struct gk20a *g, u16 val);
+                bool split_rail_support;
         } clk;
         struct {
                 u32 (*get_arbiter_clk_domains)(struct gk20a *g);
diff --git a/drivers/gpu/nvgpu/gp106/hal_gp106.c b/drivers/gpu/nvgpu/gp106/hal_gp106.c
index 3c3ad0fb..c87414d0 100644
--- a/drivers/gpu/nvgpu/gp106/hal_gp106.c
+++ b/drivers/gpu/nvgpu/gp106/hal_gp106.c
@@ -832,6 +832,7 @@ int gp106_init_hal(struct gk20a *g)
 
         g->pmu_lsf_pmu_wpr_init_done = 0;
         g->bootstrap_owner = LSF_FALCON_ID_SEC2;
+        gops->clk.split_rail_support = true;
 
         g->name = "gp10x";
 
diff --git a/drivers/gpu/nvgpu/gv100/hal_gv100.c b/drivers/gpu/nvgpu/gv100/hal_gv100.c
index e1c44dd5..f0926402 100644
--- a/drivers/gpu/nvgpu/gv100/hal_gv100.c
+++ b/drivers/gpu/nvgpu/gv100/hal_gv100.c
@@ -907,6 +907,7 @@ int gv100_init_hal(struct gk20a *g)
 
         g->pmu_lsf_pmu_wpr_init_done = 0;
         g->bootstrap_owner = LSF_FALCON_ID_SEC2;
+        gops->clk.split_rail_support = false;
 
         g->name = "gv10x";