[Nouveau] [PATCH] bios/fan: hardcode the fan mode to linear

[Martin Peres]

On 29/11/15 16:10, Martin Peres wrote:
> This is an oversight that made use of the trip-point-based fan managenent on
> cards that never expose those. This led the fan to stay at fan_min.
>
> Fortunately, the emergency code would kick when the temperature would reach
> 90°C.
>
> Reported-by: Tom Englund <tomenglund26 at gmail.com>
> Tested-by: Tom Englund <tomenglund26 at gmail.com>

Tested-by: Daemon32 <lnf.purple at gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92126

> Signed-off-by: Martin Peres <martin.peres at free.fr>
> ---
>   drm/nouveau/nvkm/subdev/bios/fan.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drm/nouveau/nvkm/subdev/bios/fan.c b/drm/nouveau/nvkm/subdev/bios/fan.c
> index 43006db..80fed7e 100644
> --- a/drm/nouveau/nvkm/subdev/bios/fan.c
> +++ b/drm/nouveau/nvkm/subdev/bios/fan.c
> @@ -83,6 +83,7 @@ nvbios_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
>   			fan->type = NVBIOS_THERM_FAN_UNK;
>   		}
>
> +		fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
>   		fan->min_duty = nvbios_rd08(bios, data + 0x02);
>   		fan->max_duty = nvbios_rd08(bios, data + 0x03);
>
>

Ben, can you merge this patch? It is kind of critical :s And it should 
be CCed to stable too, without it, some kepler/maxwell get 0% fan power 
which is kind of dangerous, even without reclocking!