drm/nouveau/clk: support for non-BIOS pstates

Make nouveau_clock_create() take new two optional arguments: an array
of pstates and its size. When these are specified,
nouveau_clock_create() will use the provided pstates instead of
probing them using the BIOS.

This is useful for platforms which do not provide a BIOS, like Tegra.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

9 files changed, 30 insertions, 20 deletions

diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/clock.h b/drivers/gpu/drm/nouveau/core/include/subdev/clock.h
index 9f37c096c34d..a7581478e4ea 100644
--- a/drivers/gpu/drm/nouveau/core/include/subdev/clock.h
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/clock.h
@@ -115,8 +115,9 @@ struct nouveau_clocks {
         int mdiv;
 };
 
-#define nouveau_clock_create(p,e,o,i,r,d)                                      \
-        nouveau_clock_create_((p), (e), (o), (i), (r), sizeof(**d), (void **)d)
+#define nouveau_clock_create(p,e,o,i,r,s,n,d)                                  \
+        nouveau_clock_create_((p), (e), (o), (i), (r), (s), (n), sizeof(**d),  \
+                              (void **)d)
 #define nouveau_clock_destroy(p) ({                                            \
         struct nouveau_clock *clk = (p);                                       \
         _nouveau_clock_dtor(nv_object(clk));                                   \
@@ -132,7 +133,8 @@ struct nouveau_clocks {
 
 int  nouveau_clock_create_(struct nouveau_object *, struct nouveau_object *,
                            struct nouveau_oclass *,
-                           struct nouveau_clocks *, bool, int, void **);
+                           struct nouveau_clocks *, struct nouveau_pstate *,
+                           int, bool, int, void **);
 void _nouveau_clock_dtor(struct nouveau_object *);
 int  _nouveau_clock_init(struct nouveau_object *);
 int  _nouveau_clock_fini(struct nouveau_object *, bool);
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/base.c b/drivers/gpu/drm/nouveau/core/subdev/clock/base.c
index 508639d0f088..d3f70d892d54 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/base.c
@@ -534,6 +534,7 @@ nouveau_clock_create_(struct nouveau_object *parent,
                       struct nouveau_object *engine,
                       struct nouveau_oclass *oclass,
                       struct nouveau_clocks *clocks,
+                      struct nouveau_pstate *pstates, int nb_pstates,
                       bool allow_reclock,
                       int length, void **object)
 {
@@ -557,10 +558,17 @@ nouveau_clock_create_(struct nouveau_object *parent,
         init_waitqueue_head(&clk->wait);
         atomic_set(&clk->waiting, 0);
 
-        idx = 0;
-        do {
-                ret = nouveau_pstate_new(clk, idx++);
-        } while (ret == 0);
+        /* If no pstates are provided, try and fetch them from the BIOS */
+        if (!pstates) {
+                idx = 0;
+                do {
+                        ret = nouveau_pstate_new(clk, idx++);
+                } while (ret == 0);
+        } else {
+                for (idx = 0; idx < nb_pstates; idx++)
+                        list_add_tail(&pstates[idx].head, &clk->states);
+                clk->state_nr = nb_pstates;
+        }
 
         clk->allow_reclock = allow_reclock;
 
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c
index eb2d4425a49e..4c48232686be 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c
@@ -82,8 +82,8 @@ nv04_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         struct nv04_clock_priv *priv;
         int ret;
 
-        ret = nouveau_clock_create(parent, engine, oclass, nv04_domain, false,
-                                   &priv);
+        ret = nouveau_clock_create(parent, engine, oclass, nv04_domain, NULL, 0,
+                                   false, &priv);
         *pobject = nv_object(priv);
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nv40.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nv40.c
index 8a9e16839791..08368fe97029 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nv40.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nv40.c
@@ -213,8 +213,8 @@ nv40_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         struct nv40_clock_priv *priv;
         int ret;
 
-        ret = nouveau_clock_create(parent, engine, oclass, nv40_domain, true,
-                                   &priv);
+        ret = nouveau_clock_create(parent, engine, oclass, nv40_domain, NULL, 0,
+                                   true, &priv);
         *pobject = nv_object(priv);
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nv50.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nv50.c
index 8c132772ba9e..5070ebc260f8 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nv50.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nv50.c
@@ -507,7 +507,7 @@ nv50_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         int ret;
 
         ret = nouveau_clock_create(parent, engine, oclass, pclass->domains,
-                                   false, &priv);
+                                   NULL, 0, false, &priv);
         *pobject = nv_object(priv);
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c
index 9fb58354a80b..087012b18956 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nva3.c
@@ -302,8 +302,8 @@ nva3_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         struct nva3_clock_priv *priv;
         int ret;
 
-        ret = nouveau_clock_create(parent, engine, oclass, nva3_domain, false,
-                                   &priv);
+        ret = nouveau_clock_create(parent, engine, oclass, nva3_domain, NULL, 0,
+                                   false, &priv);
         *pobject = nv_object(priv);
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nvaa.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nvaa.c
index 6a65fc9e9663..74e19731b1b7 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nvaa.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nvaa.c
@@ -421,8 +421,8 @@ nvaa_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         struct nvaa_clock_priv *priv;
         int ret;
 
-        ret = nouveau_clock_create(parent, engine, oclass, nvaa_domains, true,
-                                   &priv);
+        ret = nouveau_clock_create(parent, engine, oclass, nvaa_domains, NULL,
+                                   0, true, &priv);
         *pobject = nv_object(priv);
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nvc0.c
index dbf8517f54da..1234abaab2db 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nvc0.c
@@ -437,8 +437,8 @@ nvc0_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         struct nvc0_clock_priv *priv;
         int ret;
 
-        ret = nouveau_clock_create(parent, engine, oclass, nvc0_domain, false,
-                                   &priv);
+        ret = nouveau_clock_create(parent, engine, oclass, nvc0_domain, NULL, 0,
+                                   false, &priv);
         *pobject = nv_object(priv);
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nve0.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nve0.c
index 0e62a3240144..7eccad57512e 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nve0.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nve0.c
@@ -475,8 +475,8 @@ nve0_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         struct nve0_clock_priv *priv;
         int ret;
 
-        ret = nouveau_clock_create(parent, engine, oclass, nve0_domain, true,
-                                   &priv);
+        ret = nouveau_clock_create(parent, engine, oclass, nve0_domain, NULL, 0,
+                                   true, &priv);
         *pobject = nv_object(priv);
         if (ret)
                 return ret;