diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c b/drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c index f7f51f35d18b..de7dc20ed436 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c +++ b/drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c @@ -80,6 +80,32 @@ nv50_fan_pwm_set(struct nouveau_therm *therm, int line, u32 divs, u32 duty) } int +nv50_fan_pwm_clock(struct nouveau_therm *therm) +{ + int chipset = nv_device(therm)->chipset; + int crystal = nv_device(therm)->crystal; + int pwm_clock; + + /* determine the PWM source clock */ + if (chipset > 0x50 && chipset < 0x94) { + u8 pwm_div = nv_rd32(therm, 0x410c); + if (nv_rd32(therm, 0xc040) & 0x800000) { + /* Use the HOST clock (100 MHz) + * Where does this constant(2.4) comes from? */ + pwm_clock = (100000000 >> pwm_div) / 10 / 24; + } else { + /* Where does this constant(20) comes from? */ + pwm_clock = (crystal * 1000) >> pwm_div; + pwm_clock /= 20; + } + } else { + pwm_clock = (crystal * 1000) / 20; + } + + return pwm_clock; +} + +int nv50_temp_get(struct nouveau_therm *therm) { return nv_rd32(therm, 0x20400); @@ -107,6 +133,7 @@ nv50_therm_ctor(struct nouveau_object *parent, priv->fan.pwm_get = nv50_fan_pwm_get; priv->fan.pwm_set = nv50_fan_pwm_set; + priv->fan.pwm_clock = nv50_fan_pwm_clock; therm->temp_get = nv50_temp_get; therm->fan_get = nouveau_therm_fan_get; |