+/**
+ * DOC: panel power savings
+ *
+ * The display manager allows you to set your desired **panel power savings**
+ * level (between 0-4, with 0 representing off), e.g. using the following::
+ *
+ * # echo 3 > /sys/class/drm/card0-eDP-1/amdgpu/panel_power_savings
+ *
+ * Modifying this value can have implications on color accuracy, so tread
+ * carefully.
+ */
+
+static ssize_t panel_power_savings_show(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct drm_connector *connector = dev_get_drvdata(device);
+ struct drm_device *dev = connector->dev;
+ u8 val;
+
+ drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
+ val = to_dm_connector_state(connector->state)->abm_level ==
+ ABM_LEVEL_IMMEDIATE_DISABLE ? 0 :
+ to_dm_connector_state(connector->state)->abm_level;
+ drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+ return sysfs_emit(buf, "%u\n", val);
+}
+
+static ssize_t panel_power_savings_store(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct drm_connector *connector = dev_get_drvdata(device);
+ struct drm_device *dev = connector->dev;
+ long val;
+ int ret;
+
+ ret = kstrtol(buf, 0, &val);
+
+ if (ret)
+ return ret;
+
+ if (val < 0 || val > 4)
+ return -EINVAL;
+
+ drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
+ to_dm_connector_state(connector->state)->abm_level = val ?:
+ ABM_LEVEL_IMMEDIATE_DISABLE;
+ drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+ drm_kms_helper_hotplug_event(dev);
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(panel_power_savings);
+
+static struct attribute *amdgpu_attrs[] = {
+ &dev_attr_panel_power_savings.attr,
+ NULL
+};
+
+static const struct attribute_group amdgpu_group = {
+ .name = "amdgpu",
+ .attrs = amdgpu_attrs
+};
+