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    Subject[PATCH 2/5] asus-wmi: Add support for TUF laptop keyboard RGB mode control
    Date
    Adds support for TUF laptop RGB mode control.

    Two paths are added:
    - /sys/devices/platform/asus-nb-wmi/kernel_rgb_mode
    - /sys/devices/platform/asus-nb-wmi/kernel_rgb_mode_index

    Signed-off-by: Luke D. Jones <luke@ljones.dev>
    ---
    drivers/platform/x86/asus-wmi.c | 86 +++++++++++++++++++++++++++++++++
    1 file changed, 86 insertions(+)

    diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
    index 33384e3321bb..9e6b83d8dd75 100644
    --- a/drivers/platform/x86/asus-wmi.c
    +++ b/drivers/platform/x86/asus-wmi.c
    @@ -118,6 +118,9 @@ static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };

    static int throttle_thermal_policy_write(struct asus_wmi *);

    +static int tuf_rgb_brightness_set(struct led_classdev *cdev,
    + enum led_brightness brightness);
    +
    static bool ashs_present(void)
    {
    int i = 0;
    @@ -194,6 +197,9 @@ struct fan_curve_data {
    struct keyboard_rgb_led {
    struct led_classdev_mc dev;
    struct mc_subled subled_info[3]; /* r g b */
    + u8 save;
    + u8 mode;
    + u8 speed;
    };

    struct asus_wmi {
    @@ -743,6 +749,72 @@ static ssize_t egpu_enable_store(struct device *dev,

    static DEVICE_ATTR_RW(egpu_enable);

    +/* TUF Laptop Keyboard RGB Modes **********************************************/
    +static int keyboard_rgb_mode_check_present(struct asus_wmi *asus)
    +{
    + u32 result;
    + int err;
    +
    + asus->keyboard_rgb_mode_available = false;
    +
    + err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_TUF_RGB_MODE, &result);
    + if (err) {
    + if (err == -ENODEV)
    + return 0;
    + return err;
    + }
    +
    + if (result & ASUS_WMI_DSTS_PRESENCE_BIT) {
    + asus->keyboard_rgb_mode_available = true;
    + }
    +
    + return 0;
    +}
    +
    +static ssize_t keyboard_rgb_mode_store(struct device *device,
    + struct device_attribute *attr,
    + const char *buf, size_t count)
    +{
    + u8 save, mode, speed;
    + int err;
    +
    + struct asus_wmi *asus = dev_get_drvdata(device);
    + struct led_classdev *cdev = &asus->keyboard_rgb_mode.dev.led_cdev;
    +
    + if (sscanf(buf, "%hhd %hhd %hhd", &save, &mode, &speed) != 3)
    + return -EINVAL;
    +
    + asus->keyboard_rgb_mode.save = save > 0 ? 1 : 0;
    +
    + /* These are the known usable modes across all TUF/ROG */
    + asus->keyboard_rgb_mode.mode = mode < 12 && mode != 9 ? mode : 0x0a;
    +
    + if (speed == 0)
    + asus->keyboard_rgb_mode.speed = 0xe1;
    + else if (speed == 1)
    + asus->keyboard_rgb_mode.speed = 0xeb;
    + else if (speed == 2)
    + asus->keyboard_rgb_mode.speed = 0xf5;
    + else
    + asus->keyboard_rgb_mode.speed = 0xeb;
    +
    + err = tuf_rgb_brightness_set(cdev, cdev->brightness);
    + if (err)
    + return err;
    + return 0;
    +}
    +
    +static DEVICE_ATTR_WO(keyboard_rgb_mode);
    +
    +static ssize_t keyboard_rgb_mode_index_show(struct device *device,
    + struct device_attribute *attr,
    + char *buf)
    +{
    + return sysfs_emit(buf, "%s\n", "save mode speed\n");
    +}
    +
    +static DEVICE_ATTR_RO(keyboard_rgb_mode_index);
    +
    /* Battery ********************************************************************/

    /* The battery maximum charging percentage */
    @@ -1180,6 +1252,9 @@ static int asus_wmi_led_init(struct asus_wmi *asus)
    * write these defaults to the device because they will overwrite a
    * users last saved boot setting (in NVRAM).
    */
    + asus->keyboard_rgb_mode.save = 1;
    + asus->keyboard_rgb_mode.mode = 0;
    + asus->keyboard_rgb_mode.speed = 1;
    mc_cdev->led_cdev.brightness = brightness;
    mc_cdev->led_cdev.max_brightness = brightness;
    mc_led_info[0].intensity = brightness;
    @@ -3347,6 +3422,8 @@ static struct attribute *platform_attributes[] = {
    &dev_attr_touchpad.attr,
    &dev_attr_egpu_enable.attr,
    &dev_attr_dgpu_disable.attr,
    + &dev_attr_keyboard_rgb_mode.attr,
    + &dev_attr_keyboard_rgb_mode_index.attr,
    &dev_attr_lid_resume.attr,
    &dev_attr_als_enable.attr,
    &dev_attr_fan_boost_mode.attr,
    @@ -3377,6 +3454,10 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
    ok = asus->egpu_enable_available;
    else if (attr == &dev_attr_dgpu_disable.attr)
    ok = asus->dgpu_disable_available;
    + else if (attr == &dev_attr_keyboard_rgb_mode.attr)
    + ok = asus->keyboard_rgb_mode_available;
    + else if (attr == &dev_attr_keyboard_rgb_mode_index.attr)
    + ok = asus->keyboard_rgb_mode_available;
    else if (attr == &dev_attr_fan_boost_mode.attr)
    ok = asus->fan_boost_mode_available;
    else if (attr == &dev_attr_throttle_thermal_policy.attr)
    @@ -3646,6 +3727,10 @@ static int asus_wmi_add(struct platform_device *pdev)
    if (err)
    goto fail_dgpu_disable;

    + err = keyboard_rgb_mode_check_present(asus);
    + if (err)
    + goto fail_keyboard_rgb_mode;
    +
    err = fan_boost_mode_check_present(asus);
    if (err)
    goto fail_fan_boost_mode;
    @@ -3760,6 +3845,7 @@ static int asus_wmi_add(struct platform_device *pdev)
    fail_fan_boost_mode:
    fail_egpu_enable:
    fail_dgpu_disable:
    +fail_keyboard_rgb_mode:
    fail_platform:
    fail_panel_od:
    kfree(asus);
    --
    2.37.1
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