diff options
| author | Martin Peres <martin.peres@labri.fr> | 2012-09-02 04:01:43 +0200 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2012-10-03 13:13:14 +1000 |
| commit | cfc732bbc59d8905634fef7d7b02bdac84ea9221 (patch) | |
| tree | 8761fb1e9cf863f329b9265394f8cba2d5e713a3 /drivers/gpu | |
| parent | bf6546b4219d2b188529f3242efda4048f5b1b41 (diff) | |
| download | linux-cfc732bbc59d8905634fef7d7b02bdac84ea9221.tar.bz2 | |
drm/nouveau/therm: calculate the pwm divisor on nv50+
v2: Martin Peres <martin.peres@labri.fr>
- fixed unintentional use of floating point
Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/therm/fan.c | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/therm/nv50.c | 27 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/therm/priv.h | 1 |
3 files changed, 37 insertions, 4 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c b/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c index b7339b52559e..409b95d5b679 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c +++ b/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c @@ -81,10 +81,10 @@ nouveau_therm_fan_set(struct nouveau_therm *therm, int percent) if (ret == 0) { divs = priv->bios_perf_fan.pwm_divisor; if (priv->bios_fan.pwm_freq) { - /*XXX: PNVIO clock more than likely... */ - divs = 135000 /priv->bios_fan.pwm_freq; - if (nv_device(therm)->chipset < 0xa3) - divs /= 4; + divs = 1; + if (priv->fan.pwm_clock) + divs = priv->fan.pwm_clock(therm); + divs /= priv->bios_fan.pwm_freq; } duty = ((divs * percent) + 99) / 100; @@ -163,6 +163,11 @@ nouveau_therm_fan_safety_checks(struct nouveau_therm *therm) priv->bios_fan.min_duty = priv->bios_fan.max_duty; } +int nouveau_fan_pwm_clock_dummy(struct nouveau_therm *therm) +{ + return 1; +} + int nouveau_therm_fan_ctor(struct nouveau_therm *therm) { 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; diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/priv.h b/drivers/gpu/drm/nouveau/core/subdev/therm/priv.h index b7207b4524f6..c53eb5396972 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/therm/priv.h +++ b/drivers/gpu/drm/nouveau/core/subdev/therm/priv.h @@ -42,6 +42,7 @@ struct nouveau_therm_priv { int (*pwm_get)(struct nouveau_therm *, int line, u32*, u32*); int (*pwm_set)(struct nouveau_therm *, int line, u32, u32); + int (*pwm_clock)(struct nouveau_therm *); } fan; /* ic */ |