From 4cc00ad1373674cdd1bce387bd1d4e3f5c42a99c Mon Sep 17 00:00:00 2001 From: Martin Peres Date: Sun, 11 Aug 2013 22:48:49 -0400 Subject: [PATCH] drm/nouveau/fan: restore pwm value on resume when in manual/auto mode If the fan was in manual or auto mode, we should restore the fan speed that was previously set when resuming. The initial pwm value is saved when loading the module. Signed-off-by: Martin Peres Tested-by: Martin Peres Tested-by: Dash Four Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/core/subdev/therm/base.c | 7 ++++++- drivers/gpu/drm/nouveau/core/subdev/therm/fan.c | 3 +++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/base.c b/drivers/gpu/drm/nouveau/core/subdev/therm/base.c index 3e9d941de553..2ada3d71312f 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/therm/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/therm/base.c @@ -267,8 +267,13 @@ _nouveau_therm_init(struct nouveau_object *object) if (ret) return ret; - if (priv->suspend >= 0) + if (priv->suspend >= 0) { + /* restore the pwm value only when on manual or auto mode */ + if (priv->suspend > 0) + nouveau_therm_fan_set(therm, true, priv->fan->percent); + nouveau_therm_fan_mode(therm, priv->suspend); + } priv->sensor.program_alarms(therm); return 0; } diff --git a/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c b/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c index c728380d3d62..4d8450fcf0a0 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c +++ b/drivers/gpu/drm/nouveau/core/subdev/therm/fan.c @@ -234,6 +234,9 @@ nouveau_therm_fan_ctor(struct nouveau_therm *therm) nv_info(therm, "FAN control: %s\n", priv->fan->type); + /* read the current speed, it is useful when resuming */ + priv->fan->percent = nouveau_therm_fan_get(therm); + /* attempt to detect a tachometer connection */ ret = gpio->find(gpio, 0, DCB_GPIO_FAN_SENSE, 0xff, &priv->fan->tach); if (ret) -- 2.30.2