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| author | Ben Skeggs <bskeggs@redhat.com> | 2019-07-02 05:52:11 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2019-08-23 05:55:33 +0300 |
| commit | f0790cda65a1f1a3818db16e95c04c06cb7f2421 (patch) | |
| tree | b3e3c3f45c8ff77da38c62d959373a98f58ad3c8 /drivers/gpu/drm/nouveau/nvkm/subdev/bios | |
| parent | edc641b2b2f494ce74a2f657544133faf451a80c (diff) | |
| download | linux-f0790cda65a1f1a3818db16e95c04c06cb7f2421.tar.xz | |
drm/nouveau/therm: skip probing for devices not specified in thermal tables
Saves some time during driver load, as described by the relevant section[1]
of the DCB 4.x specification.
[1] https://nvidia.github.io/open-gpu-doc/DCB/DCB-4.x-Specification.html#_i2c_device_table
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c index b8578359e61b..118e33174cbe 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c @@ -46,6 +46,19 @@ extdev_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt) return extdev + *hdr; } +bool +nvbios_extdev_skip_probe(struct nvkm_bios *bios) +{ + u8 ver, hdr, len, cnt; + u16 data = extdev_table(bios, &ver, &hdr, &len, &cnt); + if (data && ver == 0x40 && hdr >= 5) { + u8 flags = nvbios_rd08(bios, data - hdr + 4); + if (flags & 1) + return true; + } + return false; +} + static u16 nvbios_extdev_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) { |