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>

drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h

@@ -278,6 +278,9 @@ enum amdgpu_pcie_gen {
 #define amdgpu_dpm_get_fan_speed_rpm(adev, s) \
 		((adev)->powerplay.pp_funcs->get_fan_speed_rpm)((adev)->powerplay.pp_handle, (s))
 
+#define amdgpu_dpm_set_fan_speed_rpm(adev, s) \
+		((adev)->powerplay.pp_funcs->set_fan_speed_rpm)((adev)->powerplay.pp_handle, (s))
+
 #define amdgpu_dpm_get_sclk(adev, l) \
 		((adev)->powerplay.pp_funcs->get_sclk((adev)->powerplay.pp_handle, (l)))
 

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 ||

drivers/gpu/drm/amd/include/kgd_pp_interface.h

@@ -230,6 +230,7 @@ struct amd_pm_funcs {
 	enum amd_dpm_forced_level (*get_performance_level)(void *handle);
 	enum amd_pm_state_type (*get_current_power_state)(void *handle);
 	int (*get_fan_speed_rpm)(void *handle, uint32_t *rpm);
+	int (*set_fan_speed_rpm)(void *handle, uint32_t rpm);
 	int (*get_pp_num_states)(void *handle, struct pp_states_info *data);
 	int (*get_pp_table)(void *handle, char **table);
 	int (*set_pp_table)(void *handle, const char *buf, size_t size);

drivers/gpu/drm/amd/powerplay/amd_powerplay.c

@@ -576,6 +576,24 @@ static int pp_dpm_get_fan_speed_rpm(void *handle, uint32_t *rpm)
 	return ret;
 }
 
+static int pp_dpm_set_fan_speed_rpm(void *handle, uint32_t rpm)
+{
+	struct pp_hwmgr *hwmgr = handle;
+	int ret = 0;
+
+	if (!hwmgr || !hwmgr->pm_en)
+		return -EINVAL;
+
+	if (hwmgr->hwmgr_func->set_fan_speed_rpm == NULL) {
+		pr_info("%s was not implemented.\n", __func__);
+		return 0;
+	}
+	mutex_lock(&hwmgr->smu_lock);
+	ret = hwmgr->hwmgr_func->set_fan_speed_rpm(hwmgr, rpm);
+	mutex_unlock(&hwmgr->smu_lock);
+	return ret;
+}
+
 static int pp_dpm_get_pp_num_states(void *handle,
 		struct pp_states_info *data)
 {
@@ -1297,6 +1315,7 @@ static const struct amd_pm_funcs pp_dpm_funcs = {
 	.set_fan_speed_percent = pp_dpm_set_fan_speed_percent,
 	.get_fan_speed_percent = pp_dpm_get_fan_speed_percent,
 	.get_fan_speed_rpm = pp_dpm_get_fan_speed_rpm,
+	.set_fan_speed_rpm = pp_dpm_set_fan_speed_rpm,
 	.get_pp_num_states = pp_dpm_get_pp_num_states,
 	.get_pp_table = pp_dpm_get_pp_table,
 	.set_pp_table = pp_dpm_set_pp_table,