drm/amdgpu: Add fan RPM setting via sysfs

Add fan1_target for get/set fan speed in RPM unit
Add fan1_min/fan1_max for get min, max fan speed in RPM unit
Add fan1_enable to enable/disable the fan1 sensor

v3: drop the hardcode value of min/max rpm in comments pointed
    out by Alex.
v2: query the min/max rpm gpu support instand of hardcode value.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 187 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 18d989e0e362..a9f68753ec7f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -1172,6 +1172,11 @@ static ssize_t amdgpu_hwmon_get_fan1_input(struct device *dev,
         struct amdgpu_device *adev = dev_get_drvdata(dev);
         int err;
         u32 speed = 0;
+        u32 pwm_mode;
+
+        pwm_mode = amdgpu_dpm_get_fan_control_mode(adev);
+        if (pwm_mode != AMD_FAN_CTRL_MANUAL)
+                return -ENODATA;
 
         /* Can't adjust fan when the card is off */
         if  ((adev->flags & AMD_IS_PX) &&
@@ -1187,6 +1192,153 @@ static ssize_t amdgpu_hwmon_get_fan1_input(struct device *dev,
         return sprintf(buf, "%i\n", speed);
 }
 
+static ssize_t amdgpu_hwmon_get_fan1_min(struct device *dev,
+                                         struct device_attribute *attr,
+                                         char *buf)
+{
+        struct amdgpu_device *adev = dev_get_drvdata(dev);
+        u32 min_rpm = 0;
+        u32 size = sizeof(min_rpm);
+        int r;
+
+        if (!adev->powerplay.pp_funcs->read_sensor)
+                return -EINVAL;
+
+        r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_MIN_FAN_RPM,
+                                   (void *)&min_rpm, &size);
+        if (r)
+                return r;
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", min_rpm);
+}
+
+static ssize_t amdgpu_hwmon_get_fan1_max(struct device *dev,
+                                         struct device_attribute *attr,
+                                         char *buf)
+{
+        struct amdgpu_device *adev = dev_get_drvdata(dev);
+        u32 max_rpm = 0;
+        u32 size = sizeof(max_rpm);
+        int r;
+
+        if (!adev->powerplay.pp_funcs->read_sensor)
+                return -EINVAL;
+
+        r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_MAX_FAN_RPM,
+                                   (void *)&max_rpm, &size);
+        if (r)
+                return r;
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", max_rpm);
+}
+
+static ssize_t amdgpu_hwmon_get_fan1_target(struct device *dev,
+                                           struct device_attribute *attr,
+                                           char *buf)
+{
+        struct amdgpu_device *adev = dev_get_drvdata(dev);
+        int err;
+        u32 rpm = 0;
+        u32 pwm_mode;
+
+        pwm_mode = amdgpu_dpm_get_fan_control_mode(adev);
+        if (pwm_mode != AMD_FAN_CTRL_MANUAL)
+                return -ENODATA;
+
+        /* Can't adjust fan when the card is off */
+        if  ((adev->flags & AMD_IS_PX) &&
+             (adev->ddev->switch_power_state != DRM_SWITCH_POWER_ON))
+                return -EINVAL;
+
+        if (adev->powerplay.pp_funcs->get_fan_speed_rpm) {
+                err = amdgpu_dpm_get_fan_speed_rpm(adev, &rpm);
+                if (err)
+                        return err;
+        }
+
+        return sprintf(buf, "%i\n", rpm);
+}
+
+static ssize_t amdgpu_hwmon_set_fan1_target(struct device *dev,
+                                     struct device_attribute *attr,
+                                     const char *buf, size_t count)
+{
+        struct amdgpu_device *adev = dev_get_drvdata(dev);
+        int err;
+        u32 value;
+        u32 pwm_mode;
+
+        pwm_mode = amdgpu_dpm_get_fan_control_mode(adev);
+        if (pwm_mode != AMD_FAN_CTRL_MANUAL)
+                return -ENODATA;
+
+        /* Can't adjust fan when the card is off */
+        if  ((adev->flags & AMD_IS_PX) &&
+             (adev->ddev->switch_power_state != DRM_SWITCH_POWER_ON))
+                return -EINVAL;
+
+        err = kstrtou32(buf, 10, &value);
+        if (err)
+                return err;
+
+        if (adev->powerplay.pp_funcs->set_fan_speed_rpm) {
+                err = amdgpu_dpm_set_fan_speed_rpm(adev, value);
+                if (err)
+                        return err;
+        }
+
+        return count;
+}
+
+static ssize_t amdgpu_hwmon_get_fan1_enable(struct device *dev,
+                                            struct device_attribute *attr,
+                                            char *buf)
+{
+        struct amdgpu_device *adev = dev_get_drvdata(dev);
+        u32 pwm_mode = 0;
+
+        if (!adev->powerplay.pp_funcs->get_fan_control_mode)
+                return -EINVAL;
+
+        pwm_mode = amdgpu_dpm_get_fan_control_mode(adev);
+
+        return sprintf(buf, "%i\n", pwm_mode == AMD_FAN_CTRL_AUTO ? 0 : 1);
+}
+
+static ssize_t amdgpu_hwmon_set_fan1_enable(struct device *dev,
+                                            struct device_attribute *attr,
+                                            const char *buf,
+                                            size_t count)
+{
+        struct amdgpu_device *adev = dev_get_drvdata(dev);
+        int err;
+        int value;
+        u32 pwm_mode;
+
+        /* Can't adjust fan when the card is off */
+        if  ((adev->flags & AMD_IS_PX) &&
+             (adev->ddev->switch_power_state != DRM_SWITCH_POWER_ON))
+                return -EINVAL;
+
+        if (!adev->powerplay.pp_funcs->set_fan_control_mode)
+                return -EINVAL;
+
+        err = kstrtoint(buf, 10, &value);
+        if (err)
+                return err;
+
+        if (value == 0)
+                pwm_mode = AMD_FAN_CTRL_AUTO;
+        else if (value == 1)
+                pwm_mode = AMD_FAN_CTRL_MANUAL;
+        else
+                return -EINVAL;
+
+        amdgpu_dpm_set_fan_control_mode(adev, pwm_mode);
+
+        return count;
+}
+
 static ssize_t amdgpu_hwmon_show_vddgfx(struct device *dev,
                                         struct device_attribute *attr,
                                         char *buf)
@@ -1406,8 +1558,16 @@ static ssize_t amdgpu_hwmon_set_power_cap(struct device *dev,
  *
  * - pwm1_max: pulse width modulation fan control maximum level (255)
  *
+ * - fan1_min: an minimum value Unit: revolution/min (RPM)
+ *
+ * - fan1_max: an maxmum value Unit: revolution/max (RPM)
+ *
  * - fan1_input: fan speed in RPM
  *
+ * - fan[1-*]_target: Desired fan speed Unit: revolution/min (RPM)
+ *
+ * - fan[1-*]_enable: Enable or disable the sensors.1: Enable 0: Disable
+ *
  * You can use hwmon tools like sensors to view this information on your system.
  *
  */
@@ -1420,6 +1580,10 @@ static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, amdgpu_hwmon_get_pwm1_
 static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO, amdgpu_hwmon_get_pwm1_min, NULL, 0);
 static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO, amdgpu_hwmon_get_pwm1_max, NULL, 0);
 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, amdgpu_hwmon_get_fan1_input, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, amdgpu_hwmon_get_fan1_min, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, amdgpu_hwmon_get_fan1_max, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR, amdgpu_hwmon_get_fan1_target, amdgpu_hwmon_set_fan1_target, 0);
+static SENSOR_DEVICE_ATTR(fan1_enable, S_IRUGO | S_IWUSR, amdgpu_hwmon_get_fan1_enable, amdgpu_hwmon_set_fan1_enable, 0);
 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, amdgpu_hwmon_show_vddgfx, NULL, 0);
 static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, amdgpu_hwmon_show_vddgfx_label, NULL, 0);
 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, amdgpu_hwmon_show_vddnb, NULL, 0);
@@ -1438,6 +1602,10 @@ static struct attribute *hwmon_attributes[] = {
         &sensor_dev_attr_pwm1_min.dev_attr.attr,
         &sensor_dev_attr_pwm1_max.dev_attr.attr,
         &sensor_dev_attr_fan1_input.dev_attr.attr,
+        &sensor_dev_attr_fan1_min.dev_attr.attr,
+        &sensor_dev_attr_fan1_max.dev_attr.attr,
+        &sensor_dev_attr_fan1_target.dev_attr.attr,
+        &sensor_dev_attr_fan1_enable.dev_attr.attr,
         &sensor_dev_attr_in0_input.dev_attr.attr,
         &sensor_dev_attr_in0_label.dev_attr.attr,
         &sensor_dev_attr_in1_input.dev_attr.attr,
@@ -1456,13 +1624,16 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
         struct amdgpu_device *adev = dev_get_drvdata(dev);
         umode_t effective_mode = attr->mode;
 
-
         /* Skip fan attributes if fan is not present */
         if (adev->pm.no_fan && (attr == &sensor_dev_attr_pwm1.dev_attr.attr ||
             attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr ||
             attr == &sensor_dev_attr_pwm1_max.dev_attr.attr ||
             attr == &sensor_dev_attr_pwm1_min.dev_attr.attr ||
-            attr == &sensor_dev_attr_fan1_input.dev_attr.attr))
+            attr == &sensor_dev_attr_fan1_input.dev_attr.attr ||
+            attr == &sensor_dev_attr_fan1_min.dev_attr.attr ||
+            attr == &sensor_dev_attr_fan1_max.dev_attr.attr ||
+            attr == &sensor_dev_attr_fan1_target.dev_attr.attr ||
+            attr == &sensor_dev_attr_fan1_enable.dev_attr.attr))
                 return 0;
 
         /* Skip limit attributes if DPM is not enabled */
@@ -1472,7 +1643,12 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
              attr == &sensor_dev_attr_pwm1.dev_attr.attr ||
              attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr ||
              attr == &sensor_dev_attr_pwm1_max.dev_attr.attr ||
-             attr == &sensor_dev_attr_pwm1_min.dev_attr.attr))
+             attr == &sensor_dev_attr_pwm1_min.dev_attr.attr ||
+             attr == &sensor_dev_attr_fan1_input.dev_attr.attr ||
+             attr == &sensor_dev_attr_fan1_min.dev_attr.attr ||
+             attr == &sensor_dev_attr_fan1_max.dev_attr.attr ||
+             attr == &sensor_dev_attr_fan1_target.dev_attr.attr ||
+             attr == &sensor_dev_attr_fan1_enable.dev_attr.attr))
                 return 0;
 
         /* mask fan attributes if we have no bindings for this asic to expose */
@@ -1497,10 +1673,18 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
         /* hide max/min values if we can't both query and manage the fan */
         if ((!adev->powerplay.pp_funcs->set_fan_speed_percent &&
              !adev->powerplay.pp_funcs->get_fan_speed_percent) &&
+             (!adev->powerplay.pp_funcs->set_fan_speed_rpm &&
+             !adev->powerplay.pp_funcs->get_fan_speed_rpm) &&
             (attr == &sensor_dev_attr_pwm1_max.dev_attr.attr ||
              attr == &sensor_dev_attr_pwm1_min.dev_attr.attr))
                 return 0;
 
+        if ((!adev->powerplay.pp_funcs->set_fan_speed_rpm &&
+             !adev->powerplay.pp_funcs->get_fan_speed_rpm) &&
+            (attr == &sensor_dev_attr_fan1_max.dev_attr.attr ||
+             attr == &sensor_dev_attr_fan1_min.dev_attr.attr))
+                return 0;
+
         /* only APUs have vddnb */
         if (!(adev->flags & AMD_IS_APU) &&
             (attr == &sensor_dev_attr_in1_input.dev_attr.attr ||