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authorRex Zhu <Rex.Zhu@amd.com>2018-01-29 18:07:01 +0800
committerAlex Deucher <alexander.deucher@amd.com>2018-02-19 14:19:45 -0500
commit8d81bce71deed6354f2035b613abf6e3033f34fb (patch)
tree42983837a1fd554ef6519c098afe32eb741003e3 /drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
parent6ab8555e04ecd2278fdca54c33a7ddac7d4ba5d2 (diff)
download96b-common-8d81bce71deed6354f2035b613abf6e3033f34fb.tar.gz
drm/amdgpu: Get/set dgpu power cap via hwmon API
v2: change power unit to microWatt Adust power limit through power1_cap Get min/max power limit through power1_cap_min/power1_cap_max Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Rex Zhu <Rex.Zhu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 39ef93ac5467..9e73cbcfce44 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -1207,6 +1207,69 @@ static ssize_t amdgpu_hwmon_show_power_avg(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%u\n", uw);
}
+static ssize_t amdgpu_hwmon_show_power_cap_min(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%i\n", 0);
+}
+
+static ssize_t amdgpu_hwmon_show_power_cap_max(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct amdgpu_device *adev = dev_get_drvdata(dev);
+ uint32_t limit = 0;
+
+ if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->get_power_limit) {
+ adev->powerplay.pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit, true);
+ return snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
+ } else {
+ return snprintf(buf, PAGE_SIZE, "\n");
+ }
+}
+
+static ssize_t amdgpu_hwmon_show_power_cap(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct amdgpu_device *adev = dev_get_drvdata(dev);
+ uint32_t limit = 0;
+
+ if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->get_power_limit) {
+ adev->powerplay.pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit, false);
+ return snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
+ } else {
+ return snprintf(buf, PAGE_SIZE, "\n");
+ }
+}
+
+
+static ssize_t amdgpu_hwmon_set_power_cap(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;
+
+ err = kstrtou32(buf, 10, &value);
+ if (err)
+ return err;
+
+ value = value / 1000000; /* convert to Watt */
+ if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->set_power_limit) {
+ err = adev->powerplay.pp_funcs->set_power_limit(adev->powerplay.pp_handle, value);
+ if (err)
+ return err;
+ } else {
+ return -EINVAL;
+ }
+
+ return count;
+}
+
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, amdgpu_hwmon_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 1);
@@ -1220,6 +1283,9 @@ static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, amdgpu_hwmon_show_vddgfx_label, NU
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, amdgpu_hwmon_show_vddnb, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, amdgpu_hwmon_show_vddnb_label, NULL, 0);
static SENSOR_DEVICE_ATTR(power1_average, S_IRUGO, amdgpu_hwmon_show_power_avg, NULL, 0);
+static SENSOR_DEVICE_ATTR(power1_cap_max, S_IRUGO, amdgpu_hwmon_show_power_cap_max, NULL, 0);
+static SENSOR_DEVICE_ATTR(power1_cap_min, S_IRUGO, amdgpu_hwmon_show_power_cap_min, NULL, 0);
+static SENSOR_DEVICE_ATTR(power1_cap, S_IRUGO | S_IWUSR, amdgpu_hwmon_show_power_cap, amdgpu_hwmon_set_power_cap, 0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
@@ -1235,6 +1301,9 @@ static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_label.dev_attr.attr,
&sensor_dev_attr_power1_average.dev_attr.attr,
+ &sensor_dev_attr_power1_cap_max.dev_attr.attr,
+ &sensor_dev_attr_power1_cap_min.dev_attr.attr,
+ &sensor_dev_attr_power1_cap.dev_attr.attr,
NULL
};
@@ -1282,6 +1351,12 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr)) /* can't manage state */
effective_mode &= ~S_IWUSR;
+ if ((adev->flags & AMD_IS_APU) &&
+ (attr == &sensor_dev_attr_power1_cap_max.dev_attr.attr ||
+ attr == &sensor_dev_attr_power1_cap_min.dev_attr.attr||
+ attr == &sensor_dev_attr_power1_cap.dev_attr.attr))
+ return 0;
+
/* 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) &&