drm/nouveau/volt: allow non-bios voltage scaling

Move the vbios parsing out of init() and call it conditionally if the
platform has a vbios. Non-vbios platforms can use the ctor() to init the
data structures.

Signed-off-by: Vince Hsu <vinceh@nvidia.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/core/subdev/volt/base.c b/drivers/gpu/drm/nouveau/core/subdev/volt/base.c
index 32794a9..26ccd8d 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/subdev/volt/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/volt/base.c
@@ -101,6 +101,41 @@ nouveau_volt_set_id(struct nouveau_volt *volt, u8 id, int condition)
        return ret;
 }
 
+static void nouveau_volt_parse_bios(struct nouveau_bios *bios,
+               struct nouveau_volt *volt)
+{
+       struct nvbios_volt_entry ivid;
+       struct nvbios_volt info;
+       u8  ver, hdr, cnt, len;
+       u16 data;
+       int i;
+
+       data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len, &info);
+       if (data && info.vidmask && info.base && info.step) {
+               for (i = 0; i < info.vidmask + 1; i++) {
+                       if (info.base >= info.min &&
+                               info.base <= info.max) {
+                               volt->vid[volt->vid_nr].uv = info.base;
+                               volt->vid[volt->vid_nr].vid = i;
+                               volt->vid_nr++;
+                       }
+                       info.base += info.step;
+               }
+               volt->vid_mask = info.vidmask;
+       } else if (data && info.vidmask) {
+               for (i = 0; i < cnt; i++) {
+                       data = nvbios_volt_entry_parse(bios, i, &ver, &hdr,
+                                                         &ivid);
+                       if (data) {
+                               volt->vid[volt->vid_nr].uv = ivid.voltage;
+                               volt->vid[volt->vid_nr].vid = ivid.vid;
+                               volt->vid_nr++;
+                       }
+               }
+               volt->vid_mask = info.vidmask;
+       }
+}
+
 int
 _nouveau_volt_init(struct nouveau_object *object)
 {
@@ -136,10 +171,6 @@ nouveau_volt_create_(struct nouveau_object *parent,
 {
        struct nouveau_bios *bios = nouveau_bios(parent);
        struct nouveau_volt *volt;
-       struct nvbios_volt_entry ivid;
-       struct nvbios_volt info;
-       u8  ver, hdr, cnt, len;
-       u16 data;
        int ret, i;
 
        ret = nouveau_subdev_create_(parent, engine, oclass, 0, "VOLT",
@@ -152,31 +183,9 @@ nouveau_volt_create_(struct nouveau_object *parent,
        volt->set = nouveau_volt_set;
        volt->set_id = nouveau_volt_set_id;
 
-       data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len, &info);
-       if (data && info.vidmask && info.base && info.step) {
-               for (i = 0; i < info.vidmask + 1; i++) {
-                       if (info.base >= info.min &&
-                           info.base <= info.max) {
-                               volt->vid[volt->vid_nr].uv = info.base;
-                               volt->vid[volt->vid_nr].vid = i;
-                               volt->vid_nr++;
-                       }
-                       info.base += info.step;
-               }
-               volt->vid_mask = info.vidmask;
-       } else
-       if (data && info.vidmask) {
-               for (i = 0; i < cnt; i++) {
-                       data = nvbios_volt_entry_parse(bios, i, &ver, &hdr,
-                                                     &ivid);
-                       if (data) {
-                               volt->vid[volt->vid_nr].uv = ivid.voltage;
-                               volt->vid[volt->vid_nr].vid = ivid.vid;
-                               volt->vid_nr++;
-                       }
-               }
-               volt->vid_mask = info.vidmask;
-       }
+       /* Assuming the non-bios device should build the voltage table later */
+       if (bios)
+               nouveau_volt_parse_bios(bios, volt);
 
        if (volt->vid_nr) {
                for (i = 0; i < volt->vid_nr; i++) {