gpu: nvgpu: Do not rail gate in simulation

Simulation does not model rails, so do not try to control them.

Change-Id: I52ec12e7865e18764274dd9ce7a2fbd196b6b9d1
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/482181
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Thomas Cherry <tcherry@nvidia.com>
Tested-by: Thomas Cherry <tcherry@nvidia.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/platform_gk20a_tegra.c b/drivers/gpu/nvgpu/gk20a/platform_gk20a_tegra.c
index 675a85b3..db501ec2 100644
--- a/drivers/gpu/nvgpu/gk20a/platform_gk20a_tegra.c
+++ b/drivers/gpu/nvgpu/gk20a/platform_gk20a_tegra.c
@@ -279,7 +279,12 @@ void gk20a_tegra_calibrate_emc(struct platform_device *pdev,
 
 static bool gk20a_tegra_is_railgated(struct platform_device *pdev)
 {
-        return !tegra_powergate_is_powered(TEGRA_POWERGATE_GPU);
+        bool ret = false;
+
+        if (!tegra_platform_is_linsim())
+                ret = !tegra_powergate_is_powered(TEGRA_POWERGATE_GPU);
+
+        return ret;
 }
 
 /*
@@ -290,7 +295,8 @@ static bool gk20a_tegra_is_railgated(struct platform_device *pdev)
 
 static int gk20a_tegra_railgate(struct platform_device *pdev)
 {
-        if (tegra_powergate_is_powered(TEGRA_POWERGATE_GPU))
+        if (!tegra_platform_is_linsim() &&
+            tegra_powergate_is_powered(TEGRA_POWERGATE_GPU))
                 tegra_powergate_partition(TEGRA_POWERGATE_GPU);
         return 0;
 }
@@ -303,8 +309,9 @@ static int gk20a_tegra_railgate(struct platform_device *pdev)
 
 static int gk20a_tegra_unrailgate(struct platform_device *pdev)
 {
-        int ret;
-        ret = tegra_unpowergate_partition(TEGRA_POWERGATE_GPU);
+        int ret = 0;
+        if (!tegra_platform_is_linsim())
+                ret = tegra_unpowergate_partition(TEGRA_POWERGATE_GPU);
         return ret;
 }