drm/amd/amdgpu: expose fan rpm though hwmon

Only for cards that are supported by powerplay.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 274f3309aec9..723ae682bf25 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -737,6 +737,21 @@ static ssize_t amdgpu_hwmon_get_pwm1(struct device *dev,
         return sprintf(buf, "%i\n", speed);
 }
 
+static ssize_t amdgpu_hwmon_get_fan1_input(struct device *dev,
+                                           struct device_attribute *attr,
+                                           char *buf)
+{
+        struct amdgpu_device *adev = dev_get_drvdata(dev);
+        int err;
+        u32 speed;
+
+        err = amdgpu_dpm_get_fan_speed_rpm(adev, &speed);
+        if (err)
+                return err;
+
+        return sprintf(buf, "%i\n", speed);
+}
+
 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);
@@ -744,6 +759,7 @@ static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, amdgpu_hwmon_get_pwm1, amdgpu
 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, amdgpu_hwmon_get_pwm1_enable, amdgpu_hwmon_set_pwm1_enable, 0);
 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 struct attribute *hwmon_attributes[] = {
         &sensor_dev_attr_temp1_input.dev_attr.attr,
@@ -753,6 +769,7 @@ static struct attribute *hwmon_attributes[] = {
         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
         &sensor_dev_attr_pwm1_min.dev_attr.attr,
         &sensor_dev_attr_pwm1_max.dev_attr.attr,
+        &sensor_dev_attr_fan1_input.dev_attr.attr,
         NULL
 };
 
@@ -804,6 +821,10 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
              attr == &sensor_dev_attr_pwm1_min.dev_attr.attr))
                 return 0;
 
+        /* requires powerplay */
+        if (attr == &sensor_dev_attr_fan1_input.dev_attr.attr)
+                return 0;
+
         return effective_mode;
 }