gpu: nvgpu: Add DT support for TPC_PG_POWERGATE

Added support for TPC_PG_POWERGATE during probe for nvgpu via DT.
A new DT binding GV11B_FUSE_OPT_TPC_DISABLE is supported by nvgpu
driver that checks for valid masks and updates the global tpc_pg_mask
flag.

Bug 200518434

Change-Id: Ia65ae518b48e36d28de5e9375bc994232f6a9438
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2117783
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Deepak Goyal <dgoyal@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

3 files changed, 33 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/module.c b/drivers/gpu/nvgpu/os/linux/module.c
index 955481c8..c453bced 100644
--- a/drivers/gpu/nvgpu/os/linux/module.c
+++ b/drivers/gpu/nvgpu/os/linux/module.c
@@ -32,6 +32,7 @@
 #include <uapi/linux/nvgpu.h>
 #include <dt-bindings/soc/gm20b-fuse.h>
 #include <dt-bindings/soc/gp10b-fuse.h>
+#include <dt-bindings/soc/gv11b-fuse.h>
 
 #include <soc/tegra/fuse.h>
 
@@ -1165,6 +1166,7 @@ static inline void set_gk20a(struct platform_device *pdev, struct gk20a *gk20a)
 static int nvgpu_read_fuse_overrides(struct gk20a *g)
 {
         struct device_node *np = nvgpu_get_node(g);
+        struct gk20a_platform *platform = dev_get_drvdata(dev_from_gk20a(g));
         u32 *fuses;
         int count, i;
 
@@ -1191,6 +1193,10 @@ static int nvgpu_read_fuse_overrides(struct gk20a *g)
                 case GP10B_FUSE_OPT_ECC_EN:
                         g->gr.fecs_feature_override_ecc_val = value;
                         break;
+                case GV11B_FUSE_OPT_TPC_DISABLE:
+                        if (platform->set_tpc_pg_mask != NULL)
+                                platform->set_tpc_pg_mask(dev_from_gk20a(g), value);
+                        break;
                 default:
                         nvgpu_err(g, "ignore unknown fuse override %08x", fuse);
                         break;
diff --git a/drivers/gpu/nvgpu/os/linux/platform_gk20a.h b/drivers/gpu/nvgpu/os/linux/platform_gk20a.h
index 1331c941..2ddadd2e 100644
--- a/drivers/gpu/nvgpu/os/linux/platform_gk20a.h
+++ b/drivers/gpu/nvgpu/os/linux/platform_gk20a.h
@@ -196,6 +196,9 @@ struct gk20a_platform {
         /* Pre callback is called before frequency change */
         void (*prescale)(struct device *dev);
 
+        /* Set TPC_PG during probe */
+        void (*set_tpc_pg_mask)(struct device *dev, u32 tpc_mask);
+
         /* Devfreq governor name. If scaling is enabled, we request
          * this governor to be used in scaling */
         const char *devfreq_governor;
diff --git a/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c b/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c
index dafa05e5..4a94c1cd 100644
--- a/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c
+++ b/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c
@@ -218,6 +218,28 @@ static int gv11b_tegra_suspend(struct device *dev)
         return 0;
 }
 
+static bool is_tpc_mask_valid(struct gk20a_platform *platform, u32 tpc_mask)
+{
+        u32 i;
+        bool valid = false;
+
+        for (i = 0; i < MAX_TPC_PG_CONFIGS; i++) {
+                if (tpc_mask == platform->valid_tpc_mask[i])
+                        valid = true;
+        }
+        return valid;
+}
+
+static void gv11b_tegra_set_tpc_pg_mask(struct device *dev, u32 tpc_mask)
+{
+        struct gk20a_platform *platform = gk20a_get_platform(dev);
+        struct gk20a *g = get_gk20a(dev);
+
+        if (is_tpc_mask_valid(platform, tpc_mask)) {
+                g->tpc_pg_mask = tpc_mask;
+        }
+}
+
 struct gk20a_platform gv11b_tegra_platform = {
         .has_syncpoints = true,
 
@@ -237,6 +259,8 @@ struct gk20a_platform gv11b_tegra_platform = {
         .valid_tpc_mask[1]      = 0x1,
         .valid_tpc_mask[2]      = 0x5,
 
+        .set_tpc_pg_mask        = gv11b_tegra_set_tpc_pg_mask,
+
         .can_slcg               = true,
         .can_blcg               = true,
         .can_elcg               = true,