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authorJean Delvare <jdelvare@suse.de>2013-09-10 10:32:41 +0200
committerAlex Deucher <alexander.deucher@amd.com>2013-09-11 11:44:36 -0400
commit6ea4e84d209c1b49c90b52efff2ab0b1824619a6 (patch)
tree57e39043de3112efa98da0902371ea9394ddc556 /drivers/gpu
parent3e4e21292d0089d4c87b933ab05c67824e940b9e (diff)
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: Jean Delvare <jdelvare@suse.de> Cc: David Airlie <airlied@linux.ie> Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/radeon_pm.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index dea7dcbb3507..33c88c4038cf 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -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)