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From 70dcf4d6e5c9e6bf72c7768051279c911b166a34 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 24 Jan 2018 17:19:33 -0500
Subject: [PATCH 3281/4131] drm/amdgpu/pm: report gpu voltages via hwmon API
Expose vddgfx and vddnb via hwmon.
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 82 ++++++++++++++++++++++++++++++++++
1 file changed, 82 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 773a915..674aeac 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -1094,6 +1094,80 @@ 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);
@@ -1102,6 +1176,10 @@ 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,
@@ -1112,6 +1190,10 @@ 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
};
--
2.7.4
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