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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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