platform/x86: asus-wmi: Add mic-mute LED classdev support

In some new ASUS devices, hotkey Fn+F13 is used for mic mute. If mic-mute
LED is present by checking WMI ASUS_WMI_DEVID_MICMUTE_LED, we will add a
mic-mute LED classdev, asus::micmute, in the asus-wmi driver to control
it. The binding of mic-mute LED controls will be swithched with LED
trigger.

Signed-off-by: PaddyKP_Yao <PaddyKP_Yao@asus.com>
Link: https://lore.kernel.org/r/20220711115125.2072508-1-PaddyKP_Yao@asus.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 7fa88ef..6a33c86 100644 (file)
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -273,6 +273,8 @@ config ASUS_WMI
        select INPUT_SPARSEKMAP
        select LEDS_CLASS
        select NEW_LEDS
+       select LEDS_TRIGGERS
+       select LEDS_TRIGGER_AUDIO
        select ACPI_PLATFORM_PROFILE
        help
          Say Y here if you have a WMI aware Asus laptop (like Eee PCs or new

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 62ce198..89b604e 100644 (file)
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -208,6 +208,7 @@ struct asus_wmi {
        int kbd_led_wk;
        struct led_classdev lightbar_led;
        int lightbar_led_wk;
+       struct led_classdev micmute_led;
        struct workqueue_struct *led_workqueue;
        struct work_struct tpd_led_work;
        struct work_struct wlan_led_work;
@@ -1028,12 +1029,23 @@ static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
        return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
 }
 
+static int micmute_led_set(struct led_classdev *led_cdev,
+                          enum led_brightness brightness)
+{
+       int state = brightness != LED_OFF;
+       int err;
+
+       err = asus_wmi_set_devstate(ASUS_WMI_DEVID_MICMUTE_LED, state, NULL);
+       return err < 0 ? err : 0;
+}
+
 static void asus_wmi_led_exit(struct asus_wmi *asus)
 {
        led_classdev_unregister(&asus->kbd_led);
        led_classdev_unregister(&asus->tpd_led);
        led_classdev_unregister(&asus->wlan_led);
        led_classdev_unregister(&asus->lightbar_led);
+       led_classdev_unregister(&asus->micmute_led);
 
        if (asus->led_workqueue)
                destroy_workqueue(asus->led_workqueue);
@@ -1105,6 +1117,19 @@ static int asus_wmi_led_init(struct asus_wmi *asus)
                                           &asus->lightbar_led);
        }
 
+       if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_MICMUTE_LED)) {
+               asus->micmute_led.name = "asus::micmute";
+               asus->micmute_led.max_brightness = 1;
+               asus->micmute_led.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
+               asus->micmute_led.brightness_set_blocking = micmute_led_set;
+               asus->micmute_led.default_trigger = "audio-micmute";
+
+               rv = led_classdev_register(&asus->platform_device->dev,
+                                               &asus->micmute_led);
+               if (rv)
+                       goto error;
+       }
+
 error:
        if (rv)
                asus_wmi_led_exit(asus);

diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index a571b47..98f2b2f 100644 (file)
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -49,6 +49,7 @@
 #define ASUS_WMI_DEVID_LED4            0x00020014
 #define ASUS_WMI_DEVID_LED5            0x00020015
 #define ASUS_WMI_DEVID_LED6            0x00020016
+#define ASUS_WMI_DEVID_MICMUTE_LED             0x00040017
 
 /* Backlight and Brightness */
 #define ASUS_WMI_DEVID_ALS_ENABLE      0x00050001 /* Ambient Light Sensor */