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Commit 6ea4e84d authored by Jean Delvare's avatar Jean Delvare Committed by Alex Deucher
Browse files

drm/radeon: expose DPM thermal thresholds through sysfs 



The hwmon sysfs interface allows exposing temperature limits. The "max"
and "min" thresholds will be exposed as a critical high limit and its
hysteresis value, respectively. This gives the user a better idea of how
well cooling is doing and whether it is sufficient.

Signed-off-by: default avatarJean Delvare <jdelvare@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 3e4e2129

drivers/gpu/drm/radeon/radeon_pm.c

+38 −0
Original line number Diff line number Diff line
@@ -536,6 +536,23 @@ static ssize_t radeon_hwmon_show_temp(struct device *dev, 
	return snprintf(buf, PAGE_SIZE, "%d\n", temp);

}



static ssize_t radeon_hwmon_show_temp_thresh(struct device *dev,

					     struct device_attribute *attr,

					     char *buf)

{

	struct drm_device *ddev = dev_get_drvdata(dev);

	struct radeon_device *rdev = ddev->dev_private;

	int hyst = to_sensor_dev_attr(attr)->index;

	int temp;



	if (hyst)

		temp = rdev->pm.dpm.thermal.min_temp;

	else

		temp = rdev->pm.dpm.thermal.max_temp;



	return snprintf(buf, PAGE_SIZE, "%d\n", temp);

}



static ssize_t radeon_hwmon_show_name(struct device *dev,

				      struct device_attribute *attr,

				      char *buf)
@@ -544,16 +561,37 @@ static ssize_t radeon_hwmon_show_name(struct device *dev, 
}



static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);

static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 0);

static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 1);

static SENSOR_DEVICE_ATTR(name, S_IRUGO, radeon_hwmon_show_name, NULL, 0);



static struct attribute *hwmon_attributes[] = {

	&sensor_dev_attr_temp1_input.dev_attr.attr,

	&sensor_dev_attr_temp1_crit.dev_attr.attr,

	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,

	&sensor_dev_attr_name.dev_attr.attr,

	NULL

};



static umode_t hwmon_attributes_visible(struct kobject *kobj,

					struct attribute *attr, int index)

{

	struct device *dev = container_of(kobj, struct device, kobj);

	struct drm_device *ddev = dev_get_drvdata(dev);

	struct radeon_device *rdev = ddev->dev_private;



	/* Skip limit attributes if DPM is not enabled */

	if (rdev->pm.pm_method != PM_METHOD_DPM &&

	    (attr == &sensor_dev_attr_temp1_crit.dev_attr.attr ||

	     attr == &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr))

		return 0;



	return attr->mode;

}



static const struct attribute_group hwmon_attrgroup = {

	.attrs = hwmon_attributes,

	.is_visible = hwmon_attributes_visible,

};



static int radeon_hwmon_init(struct radeon_device *rdev)