From a175094cd8f3d46060d8e3510bdca57eb2369a86 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Sat, 17 Sep 2011 01:42:12 +1000 Subject: [PATCH] drm/nouveau/pm: introduce generic handler for on-chip fan controller The handling of the internal pwm fan controller is similar enough between current chipsets that it makes sense to share the logic, and bugfixes :) No hw backends converted yet, will automatically fall-through to the "old" per-chipset fanspeed hooks for now. Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_drv.h | 2 + drivers/gpu/drm/nouveau/nouveau_pm.c | 94 ++++++++++++++++++++++----- 2 files changed, 80 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index 251eaf87fa2..ea4009eaab2 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -554,6 +554,8 @@ struct nouveau_pm_engine { int (*voltage_get)(struct drm_device *); int (*voltage_set)(struct drm_device *, int voltage); + int (*pwm_get)(struct drm_device *, struct dcb_gpio_entry*, u32*, u32*); + int (*pwm_set)(struct drm_device *, struct dcb_gpio_entry*, u32, u32); int (*fanspeed_get)(struct drm_device *); int (*fanspeed_set)(struct drm_device *, int fanspeed); int (*temp_get)(struct drm_device *); diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.c b/drivers/gpu/drm/nouveau/nouveau_pm.c index 23b297fd6f6..b94364dbe35 100644 --- a/drivers/gpu/drm/nouveau/nouveau_pm.c +++ b/drivers/gpu/drm/nouveau/nouveau_pm.c @@ -34,6 +34,74 @@ #include #include +static int +nouveau_pwmfan_get(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + struct nouveau_pm_engine *pm = &dev_priv->engine.pm; + struct dcb_gpio_entry *gpio; + u32 divs, duty; + int ret; + + if (!pm->pwm_get) { + if (pm->fanspeed_get) + return pm->fanspeed_get(dev); + return -ENODEV; + } + + gpio = nouveau_bios_gpio_entry(dev, DCB_GPIO_PWM_FAN); + if (gpio) { + ret = pm->pwm_get(dev, gpio, &divs, &duty); + if (ret == 0) { + divs = max(divs, duty); + if (dev_priv->card_type <= NV_40 || + (gpio->state[0] & 1)) + duty = divs - duty; + return (duty * 100) / divs; + } + + return pgpio->get(dev, gpio->tag) * 100; + } + + return -ENODEV; +} + +static int +nouveau_pwmfan_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 dcb_gpio_entry *gpio; + u32 divs, duty; + + if (!pm->pwm_set) { + if (pm->fanspeed_set) + return pm->fanspeed_set(dev, percent); + return -ENODEV; + } + + gpio = nouveau_bios_gpio_entry(dev, DCB_GPIO_PWM_FAN); + if (gpio) { + divs = pm->pwm_divisor; + if (pm->fan.pwm_freq) { + /*XXX: PNVIO clock more than likely... */ + divs = 135000 / pm->fan.pwm_freq; + if (dev_priv->chipset < 0xa3) + divs /= 4; + } + + duty = ((divs * percent) + 99) / 100; + if (dev_priv->card_type <= NV_40 || + (gpio->state[0] & 1)) + duty = divs - duty; + + return pm->pwm_set(dev, gpio, divs, duty); + } + + return -ENODEV; +} + static int nouveau_pm_clock_set(struct drm_device *dev, struct nouveau_pm_level *perflvl, u8 id, u32 khz) @@ -68,9 +136,9 @@ nouveau_pm_perflvl_set(struct drm_device *dev, struct nouveau_pm_level *perflvl) * on recent boards.. or maybe on some other factor we don't * know about? */ - if (pm->fanspeed_set && perflvl->fanspeed) { - ret = pm->fanspeed_set(dev, perflvl->fanspeed); - if (ret) + if (perflvl->fanspeed) { + ret = nouveau_pwmfan_set(dev, perflvl->fanspeed); + if (ret && ret != -ENODEV) NV_ERROR(dev, "set fanspeed failed: %d\n", ret); } @@ -171,11 +239,9 @@ nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl) } } - if (pm->fanspeed_get) { - ret = pm->fanspeed_get(dev); - if (ret > 0) - perflvl->fanspeed = ret; - } + ret = nouveau_pwmfan_get(dev); + if (ret > 0) + perflvl->fanspeed = ret; return 0; } @@ -471,12 +537,9 @@ static ssize_t nouveau_hwmon_get_pwm0(struct device *d, struct device_attribute *a, char *buf) { struct drm_device *dev = dev_get_drvdata(d); - struct drm_nouveau_private *dev_priv = dev->dev_private; - struct nouveau_pm_engine *pm = &dev_priv->engine.pm; - int ret = -ENODEV; + int ret; - if (pm->fanspeed_get) - ret = pm->fanspeed_get(dev); + ret = nouveau_pwmfan_get(dev); if (ret < 0) return ret; @@ -504,8 +567,7 @@ nouveau_hwmon_set_pwm0(struct device *d, struct device_attribute *a, if (value > pm->fan.max_duty) value = pm->fan.max_duty; - if (pm->fanspeed_set) - ret = pm->fanspeed_set(dev, value); + ret = nouveau_pwmfan_set(dev, value); if (ret) return ret; @@ -660,7 +722,7 @@ nouveau_hwmon_init(struct drm_device *dev) /*XXX: incorrect, need better detection for this, some boards have * the gpio entries for pwm fan control even when there's no * actual fan connected to it... therm table? */ - if (pm->fanspeed_get && pm->fanspeed_get(dev) >= 0) { + if (nouveau_pwmfan_get(dev) >= 0) { ret = sysfs_create_group(&dev->pdev->dev.kobj, &hwmon_pwm_fan_attrgroup); if (ret) -- 2.46.0