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>

1 files changed, 4 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,