diff options
| author |   Karol Herbst <karolherbst@gmail.com> | 2016-07-12 21:36:08 +0200 |
|---|---|---|
| committer |   Ben Skeggs <bskeggs@redhat.com> | 2016-10-12 17:29:20 +1000 |
| commit | 17d063dbdce3bab04957b2281dcdceecb7407170 (patch) | |
| tree | ba64d59bf1f92bfb2fb6e9fdd0eee83699f93d53 /drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c | |
| parent | drm/nouveau/volt: Properly detect entry based voltage tables (diff) | |
| download | linux-dev-17d063dbdce3bab04957b2281dcdceecb7407170.tar.xz linux-dev-17d063dbdce3bab04957b2281dcdceecb7407170.zip | |
drm/nouveau/clk: Don't create cstates with voltages higher than what the gpu can do
nvkm_volt_map_min is a copy of nvkm_volt_map, which always returns the
lowest possible voltage for a cstate.
nvkm_volt_map will get a temperature parameter there later and also fix
the voltage calculation, so that this functions will be completly
different later.
Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
Tested-by: Pierre Moreau <pierre.morrow@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c index 53a1cba6ad8d..6eeb9d9de334 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c @@ -65,6 +65,28 @@ nvkm_volt_set(struct nvkm_volt *volt, u32 uv) return ret; } +int +nvkm_volt_map_min(struct nvkm_volt *volt, u8 id) +{ + struct nvkm_bios *bios = volt->subdev.device->bios; + struct nvbios_vmap_entry info; + u8 ver, len; + u16 vmap; + + vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info); + if (vmap) { + if (info.link != 0xff) { + int ret = nvkm_volt_map_min(volt, info.link); + if (ret < 0) + return ret; + info.min += ret; + } + return info.min; + } + + return id ? id * 10000 : -ENODEV; +} + static int nvkm_volt_map(struct nvkm_volt *volt, u8 id) { |