diff options
author | Martin Peres <martin.peres@labri.fr> | 2012-12-05 10:28:09 (GMT) |
---|---|---|
committer | Ben Skeggs <bskeggs@redhat.com> | 2013-02-20 06:00:21 (GMT) |
commit | 694472f4170c52a18893b0db8c8e3b865a85a457 (patch) | |
tree | 5ef92e9ab2545ca3db9e931465dde8277c46c459 /drivers/gpu/drm/nouveau/core/subdev/therm/base.c | |
parent | fa37e8dda2617d48fbc6b17dd6e986e7f4c2bc8b (diff) | |
download | linux-fsl-qoriq-694472f4170c52a18893b0db8c8e3b865a85a457.tar.xz |
drm/nouveau/therm: implement automatic fan management
v2: improved design but drops safety monitoring (to be in a later patch)
v3: fix locking and mode management
v4: gently fallback to the no-control mode when temperature cannot be got
and use kernel-provided min/max macros
v5 (Ben Skeggs):
- rebased on my previous patches
v6: fix hysterisis management in trip-based auto fan management
This commit also forbids access to fan management to nvc0+ chipsets as
fan management is already taken care of my PDAEMON's default fw.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Martin Peres <martin.peres@labri.fr>
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/therm/base.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/therm/base.c | 131 |
1 files changed, 129 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/base.c b/drivers/gpu/drm/nouveau/core/subdev/therm/base.c index 4ebd3c8..dee764c 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/therm/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/therm/base.c @@ -29,6 +29,130 @@ #include "priv.h" +static int +nouveau_therm_update_trip(struct nouveau_therm *therm) +{ + struct nouveau_therm_priv *priv = (void *)therm; + struct nouveau_therm_trip_point *trip = priv->fan->bios.trip, + *cur_trip = NULL, + *last_trip = priv->last_trip; + u8 temp = therm->temp_get(therm); + u16 duty, i; + + /* look for the trip point corresponding to the current temperature */ + cur_trip = NULL; + for (i = 0; i < priv->fan->bios.nr_fan_trip; i++) { + if (temp >= trip[i].temp) + cur_trip = &trip[i]; + } + + /* account for the hysteresis cycle */ + if (last_trip && temp <= (last_trip->temp) && + temp > (last_trip->temp - last_trip->hysteresis)) + cur_trip = last_trip; + + if (cur_trip) { + duty = cur_trip->fan_duty; + priv->last_trip = cur_trip; + } else { + duty = 0; + priv->last_trip = NULL; + } + + return duty; +} + +static int +nouveau_therm_update_linear(struct nouveau_therm *therm) +{ + struct nouveau_therm_priv *priv = (void *)therm; + u8 linear_min_temp = priv->fan->bios.linear_min_temp; + u8 linear_max_temp = priv->fan->bios.linear_max_temp; + u8 temp = therm->temp_get(therm); + u16 duty; + + duty = (temp - linear_min_temp); + duty *= (priv->fan->bios.max_duty - priv->fan->bios.min_duty); + duty /= (linear_max_temp - linear_min_temp); + duty += priv->fan->bios.min_duty; + + return duty; +} + +static void +nouveau_therm_update(struct nouveau_therm *therm, int mode) +{ + struct nouveau_timer *ptimer = nouveau_timer(therm); + struct nouveau_therm_priv *priv = (void *)therm; + unsigned long flags; + int duty; + + spin_lock_irqsave(&priv->lock, flags); + if (mode < 0) + mode = priv->mode; + priv->mode = mode; + + switch (mode) { + case FAN_CONTROL_MANUAL: + duty = priv->fan->percent; + break; + case FAN_CONTROL_AUTO: + if (priv->fan->bios.nr_fan_trip) + duty = nouveau_therm_update_trip(therm); + else + duty = nouveau_therm_update_linear(therm); + break; + case FAN_CONTROL_NONE: + default: + goto done; + } + + nouveau_therm_fan_set(therm, (mode != FAN_CONTROL_AUTO), duty); + +done: + if (list_empty(&priv->alarm.head) && (mode == FAN_CONTROL_AUTO)) + ptimer->alarm(ptimer, 1000000000ULL, &priv->alarm); + spin_unlock_irqrestore(&priv->lock, flags); +} + +static void +nouveau_therm_alarm(struct nouveau_alarm *alarm) +{ + struct nouveau_therm_priv *priv = + container_of(alarm, struct nouveau_therm_priv, alarm); + nouveau_therm_update(&priv->base, -1); +} + +static int +nouveau_therm_mode(struct nouveau_therm *therm, int mode) +{ + struct nouveau_therm_priv *priv = (void *)therm; + + if (priv->mode == mode) + return 0; + + /* The default PDAEMON ucode interferes with fan management */ + if (nv_device(therm)->card_type >= NV_C0) + return -EINVAL; + + switch (mode) { + case FAN_CONTROL_NONE: + nv_info(therm, "switch to no-control mode\n"); + break; + case FAN_CONTROL_MANUAL: + nv_info(therm, "switch to manual mode\n"); + break; + case FAN_CONTROL_AUTO: + nv_info(therm, "switch to automatic mode\n"); + break; + default: + return -EINVAL; + } + + nouveau_therm_update(therm, mode); + return 0; +} + int nouveau_therm_attr_get(struct nouveau_therm *therm, enum nouveau_therm_attr_type type) @@ -41,7 +165,7 @@ nouveau_therm_attr_get(struct nouveau_therm *therm, case NOUVEAU_THERM_ATTR_FAN_MAX_DUTY: return priv->fan->bios.max_duty; case NOUVEAU_THERM_ATTR_FAN_MODE: - return priv->fan->mode; + return priv->mode; case NOUVEAU_THERM_ATTR_THRS_FAN_BOOST: return priv->bios_sensor.thrs_fan_boost.temp; case NOUVEAU_THERM_ATTR_THRS_FAN_BOOST_HYST: @@ -85,7 +209,7 @@ nouveau_therm_attr_set(struct nouveau_therm *therm, priv->fan->bios.max_duty = value; return 0; case NOUVEAU_THERM_ATTR_FAN_MODE: - return nouveau_therm_fan_set_mode(therm, value); + return nouveau_therm_mode(therm, value); case NOUVEAU_THERM_ATTR_THRS_FAN_BOOST: priv->bios_sensor.thrs_fan_boost.temp = value; return 0; @@ -158,6 +282,9 @@ nouveau_therm_create_(struct nouveau_object *parent, if (ret) return ret; + nouveau_alarm_init(&priv->alarm, nouveau_therm_alarm); + spin_lock_init(&priv->lock); + priv->base.fan_get = nouveau_therm_fan_user_get; priv->base.fan_set = nouveau_therm_fan_user_set; priv->base.fan_sense = nouveau_therm_fan_sense; |