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 | 4a4555a7f1dd60fe34336f440ff1de73313820ee (patch) | |
| tree | 40b794fd541501aa008a5d23fbcad526a6ad328d /drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c | |
| parent | drm/nouveau/clk: Don't create cstates with voltages higher than what the gpu can do (diff) | |
| download | linux-dev-4a4555a7f1dd60fe34336f440ff1de73313820ee.tar.xz linux-dev-4a4555a7f1dd60fe34336f440ff1de73313820ee.zip | |
drm/nouveau/volt: Parse the max voltage map entries
There are at least three "max" entries, which specify the max voltage.
Because they are actually normal voltage map entries, they can also be
affected by the temperature.
Nvidia respects those entries and if they get changed, nvidia uses the
lower voltage from all three.
We shouldn't exceed those voltages at any given time.
v2: State what those entries do in the source.
v3: Add the third max entry.
v5: Better describe the entries.
Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c index 2f13db745948..f2295e180e5e 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c @@ -61,7 +61,17 @@ nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, memset(info, 0x00, sizeof(*info)); switch (!!vmap * *ver) { case 0x10: + info->max0 = 0xff; + info->max1 = 0xff; + info->max2 = 0xff; + break; case 0x20: + info->max0 = nvbios_rd08(bios, vmap + 0x7); + info->max1 = nvbios_rd08(bios, vmap + 0x8); + if (*len >= 0xc) + info->max2 = nvbios_rd08(bios, vmap + 0xc); + else + info->max2 = 0xff; break; } return vmap; |