gpu: nvgpu: Add GPU Fmax@Vmin access through BPMP

On Tegra platforms that have clock management under BPMP, and do not
support Tegra DVFS, GPU driver cannot access Fmax@Vmin (get interface
always returns "0"). Added such access through BPMP DVFS shim driver.

Bug 2045903

Change-Id: I0222f2e2917cda15d18ea3296dd1fe53b2ea6b45
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1722431
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
index 08c5df0f..df10e36c 100644
--- a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
+++ b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
@@ -24,6 +24,7 @@
 
 #include <soc/tegra/tegra_bpmp.h>
 #include <soc/tegra/tegra_powergate.h>
+#include <soc/tegra/tegra-bpmp-dvfs.h>
 
 #include <dt-bindings/memory/tegra-swgroup.h>
 
@@ -98,6 +99,13 @@ int gp10b_tegra_get_clocks(struct device *dev)
         }
         platform->num_clks = i;
 
+        if (platform->clk[0]) {
+                i = tegra_bpmp_dvfs_get_clk_id(dev->of_node,
+                                               tegra_gp10b_clocks[0].name);
+                if (i > 0)
+                        platform->maxmin_clk_id = i;
+        }
+
         return 0;
 }