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drm/nv50/pm: mostly nailed down fan pwm frequency selection

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-08-15 16:13:34 +10:00
parent 11b7d89521
commit 3f8e11e4b6
4 changed files with 17 additions and 4 deletions
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1
drivers/gpu/drm/nouveau/nouveau_drv.h
View File

@ -524,6 +524,7 @@ struct nouveau_pm_memtimings {
struct nouveau_pm_fan {
u32 min_duty;
u32 max_duty;
u32 pwm_freq;
};
struct nouveau_pm_engine {

5
drivers/gpu/drm/nouveau/nouveau_perf.c
View File

@ -206,13 +206,12 @@ nouveau_perf_init(struct drm_device *dev)
if (version < 0x40) {
recordlen = perf[3] + (perf[4] * perf[5]);
entries = perf[2];
pm->pwm_divisor = ROM16(perf[6]);
} else {
recordlen = perf[2] + (perf[3] * perf[4]);
entries = perf[5];
}
if (version < 0x30)
pm->pwm_divisor = ROM16(perf[6]);
} else {
if (bios->data[bios->offset + 6] < 0x25) {
legacy_perf_init(dev);

3
drivers/gpu/drm/nouveau/nouveau_temp.c
View File

@ -164,6 +164,9 @@ nouveau_temp_vbios_parse(struct drm_device *dev, u8 *temp)
pm->fan.min_duty = value & 0xff;
pm->fan.max_duty = (value & 0xff00) >> 8;
break;
case 0x26:
pm->fan.pwm_freq = value;
break;
}
temp += recordlen;
}

12
drivers/gpu/drm/nouveau/nv50_pm.c
View File

@ -201,6 +201,8 @@ nv50_pm_fanspeed_get(struct drm_device *dev)
int
nv50_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;
struct pwm_info pwm;
u32 divs, duty;
int ret;
@ -209,12 +211,20 @@ nv50_pm_fanspeed_set(struct drm_device *dev, int percent)
if (ret)
return ret;
divs = nv_rd32(dev, 0x00e114 + (pwm.id * 8));
divs = pm->pwm_divisor;
if (pm->fan.pwm_freq) {
/*XXX: PNVIO clock more than likely... */
divs = 1350000 / pm->fan.pwm_freq;
if (dev_priv->chipset < 0xa3)
divs /= 4;
}
duty = ((divs * percent) + 99) / 100;
if (pwm.invert)
duty = divs - duty;
nv_mask(dev, pwm.ctrl, 0x00010001 << pwm.line, 0x00000001 << pwm.line);
nv_wr32(dev, 0x00e114 + (pwm.id * 8), divs);
nv_wr32(dev, 0x00e118 + (pwm.id * 8), 0x80000000 | duty);
return 0;
}