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authorAlex Deucher <alexander.deucher@amd.com>2018-01-24 17:19:33 -0500
committerAlex Deucher <alexander.deucher@amd.com>2018-02-19 14:18:49 -0500
commit2bd376bf8f4db03f30ea9d9832a75bc29c2e6e6a (patch)
treef6024d1799cc7e774baf2727dd06a60a5320c952 /drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
parent5ec36e2d7030c17bd00c9766f9b97b421eae8cdf (diff)
download96b-common-2bd376bf8f4db03f30ea9d9832a75bc29c2e6e6a.tar.gz
drm/amdgpu/pm: report gpu voltages via hwmon API
Expose vddgfx and vddnb via hwmon. Acked-by: Christian K├Ânig <christian.koenig@amd.com> Reviewed-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.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 18873c2286f9..eaf91d0e831e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -1096,6 +1096,80 @@ static ssize_t amdgpu_hwmon_get_fan1_input(struct device *dev,
return sprintf(buf, "%i\n", speed);
}
+static ssize_t amdgpu_hwmon_show_vddgfx(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct amdgpu_device *adev = dev_get_drvdata(dev);
+ struct drm_device *ddev = adev->ddev;
+ u32 vddgfx;
+ int r, size = sizeof(vddgfx);
+
+ /* Can't get voltage when the card is off */
+ if ((adev->flags & AMD_IS_PX) &&
+ (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
+ return -EINVAL;
+
+ /* sanity check PP is enabled */
+ if (!(adev->powerplay.pp_funcs &&
+ adev->powerplay.pp_funcs->read_sensor))
+ return -EINVAL;
+
+ /* get the voltage */
+ r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_VDDGFX,
+ (void *)&vddgfx, &size);
+ if (r)
+ return r;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", vddgfx);
+}
+
+static ssize_t amdgpu_hwmon_show_vddgfx_label(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "vddgfx\n");
+}
+
+static ssize_t amdgpu_hwmon_show_vddnb(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct amdgpu_device *adev = dev_get_drvdata(dev);
+ struct drm_device *ddev = adev->ddev;
+ u32 vddnb;
+ int r, size = sizeof(vddnb);
+
+ /* only APUs have vddnb */
+ if (adev->flags & AMD_IS_APU)
+ return -EINVAL;
+
+ /* Can't get voltage when the card is off */
+ if ((adev->flags & AMD_IS_PX) &&
+ (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
+ return -EINVAL;
+
+ /* sanity check PP is enabled */
+ if (!(adev->powerplay.pp_funcs &&
+ adev->powerplay.pp_funcs->read_sensor))
+ return -EINVAL;
+
+ /* get the voltage */
+ r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_VDDNB,
+ (void *)&vddnb, &size);
+ if (r)
+ return r;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", vddnb);
+}
+
+static ssize_t amdgpu_hwmon_show_vddnb_label(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "vddnb\n");
+}
+
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);
@@ -1104,6 +1178,10 @@ 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(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);
+static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, amdgpu_hwmon_show_vddnb_label, NULL, 0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
@@ -1114,6 +1192,10 @@ 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_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in0_label.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_label.dev_attr.attr,
NULL
};