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drm/nv40/pm: implement first type of pwm fanspeed funcs 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-07-28 10:40:48 +10:00
parent 0c101461e2
commit 9232969e19
3 changed files with 37 additions and 0 deletions
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2
drivers/gpu/drm/nouveau/nouveau_pm.h
View File

@ -56,6 +56,8 @@ void nv04_pm_clock_set(struct drm_device *, void *);
int nv40_pm_clocks_get(struct drm_device *, struct nouveau_pm_level *);
void *nv40_pm_clocks_pre(struct drm_device *, struct nouveau_pm_level *);
void nv40_pm_clocks_set(struct drm_device *, void *);
int nv40_pm_fanspeed_get(struct drm_device *);
int nv40_pm_fanspeed_set(struct drm_device *, int percent);
/* nv50_pm.c */
int nv50_pm_clock_get(struct drm_device *, u32 id);

9
drivers/gpu/drm/nouveau/nouveau_state.c
View File

@ -292,6 +292,15 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
engine->pm.voltage_get = nouveau_voltage_gpio_get;
engine->pm.voltage_set = nouveau_voltage_gpio_set;
engine->pm.temp_get = nv40_temp_get;
switch (dev_priv->chipset) {
case 0x40:
case 0x49:
engine->pm.fanspeed_get = nv40_pm_fanspeed_get;
engine->pm.fanspeed_set = nv40_pm_fanspeed_set;
break;
default:
break;
}
engine->vram.init = nouveau_mem_detect;
engine->vram.takedown = nouveau_stub_takedown;
engine->vram.flags_valid = nouveau_mem_flags_valid;

26
drivers/gpu/drm/nouveau/nv40_pm.c
View File

@ -346,3 +346,29 @@ resume:
kfree(info);
}
int
nv40_pm_fanspeed_get(struct drm_device *dev)
{
u32 reg = nv_rd32(dev, 0x0010f0);
if (reg & 0x80000000) {
u32 duty = (reg & 0x7fff0000) >> 16;
u32 divs = (reg & 0x00007fff);
if (divs && divs >= duty)
return ((divs - duty) * 100) / divs;
}
return 100;
}
int
nv40_pm_fanspeed_set(struct drm_device *dev, int percent)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
u32 divs = pm->pwm_divisor;
u32 duty = ((100 - percent) * divs) / 100;
nv_wr32(dev, 0x0010f0, 0x80000000 | (duty << 16) | divs);
return 0;
}