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drm/nouveau/bios: parse fan bump/slow periods, and trip points 

Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Martin Peres 2012-12-05 18:42:00 +10:00 committed by Ben Skeggs
parent 0cbf83bbe5
commit 06afd4e83b
2 changed files with 42 additions and 0 deletions
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16
drivers/gpu/drm/nouveau/core/include/subdev/bios/therm.h
View File

@ -23,11 +23,27 @@ struct nvbios_therm_sensor {
struct nvbios_therm_threshold thrs_shutdown;
};
/* no vbios have more than 6 */
#define NOUVEAU_TEMP_FAN_TRIP_MAX 10
struct nouveau_therm_trip_point {
int fan_duty;
int temp;
int hysteresis;
};
struct nvbios_therm_fan {
u16 pwm_freq;
u8 min_duty;
u8 max_duty;
u16 bump_period;
u16 slow_down_period;
struct nouveau_therm_trip_point trip[NOUVEAU_TEMP_FAN_TRIP_MAX];
u8 nr_fan_trip;
u8 linear_min_temp;
u8 linear_max_temp;
};
enum nvbios_therm_domain {

26
drivers/gpu/drm/nouveau/core/subdev/bios/therm.c
View File

@ -155,10 +155,15 @@ int
nvbios_therm_fan_parse(struct nouveau_bios *bios,
struct nvbios_therm_fan *fan)
{
struct nouveau_therm_trip_point *cur_trip = NULL;
u8 ver, len, i;
u16 entry;
uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0,
75, 0, 85, 0, 100, 0, 100, 0 };
i = 0;
fan->nr_fan_trip = 0;
while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
s16 value = nv_ro16(bios, entry + 1);
@ -167,9 +172,30 @@ nvbios_therm_fan_parse(struct nouveau_bios *bios,
fan->min_duty = value & 0xff;
fan->max_duty = (value & 0xff00) >> 8;
break;
case 0x24:
fan->nr_fan_trip++;
cur_trip = &fan->trip[fan->nr_fan_trip - 1];
cur_trip->hysteresis = value & 0xf;
cur_trip->temp = (value & 0xff0) >> 4;
cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
break;
case 0x25:
cur_trip = &fan->trip[fan->nr_fan_trip - 1];
cur_trip->fan_duty = value;
break;
case 0x26:
fan->pwm_freq = value;
break;
case 0x3b:
fan->bump_period = value;
break;
case 0x3c:
fan->slow_down_period = value;
break;
case 0x46:
fan->linear_min_temp = nv_ro08(bios, entry + 1);
fan->linear_max_temp = nv_ro08(bios, entry + 2);
break;
}
}