This adds the NvPmEnableGating config option to nouveau, which can be used to enable or disable clockgating for supported chipsets. Enabling can be done by passing
config=NvPmEnableGating=1
To nouveau. If your chipset supports it, you'll see a message in your kernel log indicating that clockgating is enabled. Since clockgating has only had limited testing thus far, we leave this option disabled by default for now.
Signed-off-by: Lyude Paul lyude@redhat.com --- drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c index de07bc07abdb..bf62303571b3 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c @@ -434,7 +434,9 @@ nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device, therm->attr_get = nvkm_therm_attr_get; therm->attr_set = nvkm_therm_attr_set; therm->mode = therm->suspend = -1; /* undefined */ - therm->clkgating_enabled = false; + + therm->clkgating_enabled = nvkm_boolopt(device->cfgopt, + "NvPmEnableGating", false); }
int