#include <linux/dmi.h>
#include <linux/hid.h>
#include <linux/module.h>
+#include <linux/platform_data/x86/asus-wmi.h>
#include <linux/input/mt.h>
#include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
}
+/* WMI-based keyboard backlight LED control (via asus-wmi driver) takes
+ * precedence. We only activate HID-based backlight control when the
+ * WMI control is not available.
+ */
+static bool asus_kbd_wmi_led_control_present(struct hid_device *hdev)
+{
+ u32 value;
+ int ret;
+
+ ret = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2,
+ ASUS_WMI_DEVID_KBD_BACKLIGHT, 0, &value);
+ hid_dbg(hdev, "WMI backlight check: rc %d value %x", ret, value);
+ if (ret)
+ return false;
+
+ return !!(value & ASUS_WMI_DSTS_PRESENCE_BIT);
+}
+
static int asus_kbd_register_leds(struct hid_device *hdev)
{
struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
drvdata->input = input;
- if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
+ if (drvdata->enable_backlight &&
+ !asus_kbd_wmi_led_control_present(hdev) &&
+ asus_kbd_register_leds(hdev))
hid_warn(hdev, "Failed to initialize backlight.\n");
return 0;