From nobody Mon Jun 8 07:24:35 2026 Received: from mail.sntiq.com (mail.sntiq.com [45.149.154.214]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E38F5149C7B; Sun, 31 May 2026 21:54:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.149.154.214 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780264469; cv=none; b=PSz+1lVgPa0j4UBzU+sI5aKWiv7hZ6H+mUuyfGoJJG1gk+/F2kqnn1i0sMuILYx2JfqYgbXlBSEizWx3eIvUxxxmjcv0+hNRo3bK9eQ6a6r2VP8moKjDTElrh31BP8KQF2uvR1y7XwdfukiS8I5Q58jVnNAUkO6tuHOZg6EGDcY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780264469; c=relaxed/simple; bh=WYOBMitI383ERoaL9RMJrTA9m3SiFviE4O7Kn9wn7bY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=VFAN4BcbVv/2BXFangn+pswOa6CknB13a4B+crsEe6Y/LLLvAMUzmZk5diuoYgAQxiWKLVc4RioGMJAuplnvL6VIT+wErLlK7rsl/ycNtlf9YFXwd1ThViVoQF93LSh9xLYUA9111qzcx10ZdPFna4/psHjQvf8QeWWq6j/rcoA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=sntiq.com; spf=pass smtp.mailfrom=sntiq.com; dkim=pass (2048-bit key) header.d=sntiq.com header.i=@sntiq.com header.b=nwmE7CFF; arc=none smtp.client-ip=45.149.154.214 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=sntiq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sntiq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sntiq.com header.i=@sntiq.com header.b="nwmE7CFF" Received: from node (unknown [209.198.153.231]) by mail.sntiq.com (Postfix) with ESMTPSA id 54E94801E5; Sun, 31 May 2026 21:52:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sntiq.com; s=dkim; t=1780264465; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=CCrvPuoLCQ0WWxJEZEGqXD0fO3q5kqOSeZHPvNdNIxk=; b=nwmE7CFFmjsMzayUGPg0iGVjH8nr5koLTKd+2l/nEL/4hCmMqkbRI1MWyOxdA+NOcUjo3g MJccJXp5gH2HFakxTrahjFw73PdM/CGXTAjiBCeiKWX5f2C/jZucczbQwht8qBvEZx9atC rkhJJuFvKcqEx/6V1ssC4q1DqBWC9MfGXsjWP9CGPqteZ0tIFNjO02QDfmx3bxodxfuhYD 168ub/09F8sE2cANcAw9yEGfzNCecaUYDz/IJfrOHZC1DK5QHZOdHKCJmFeYAZKEgDoMeK MbHrpbsTWglKor2dwYh1NPYCVw+s/ZUGgL9QTLGRNb2aqHRkGyEKYtcWaT8o4A== From: David Glushkov To: Jiri Kosina Cc: Benjamin Tissoires , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] HID: steelseries: Add MSI Raider A18 HX A9WJG RGB support Date: Sun, 31 May 2026 23:52:04 +0200 Message-ID: <20260531215204.172030-1-david.glushkov@sntiq.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The MSI Raider A18 HX A9WJG exposes two internal SteelSeries USB HID devices for RGB lighting: KLC (1038:1122) for the keyboard and ALC (1038:1161) for the lightbar/logo zones. Add DMI-gated support for these devices and expose them as multicolor LED class devices. The driver sends the same HID class SET_REPORT control transfer as the tested userspace implementation for this machine and writes a uniform RGB value to all known keyboard keys or ALC zones. Limit binding to USB interface 0 and the tested DMI system because the KLC product ID is shared across MSI laptop designs and the key layout mapping is model-specific. Tested on MSI Raider A18 HX A9WJG. Both internal SteelSeries ALC (1038:1161) and KLC (1038:1122) HID devices bind on interface 0 and create steelseries::lightbar and steelseries::kbd_backlight. Setting multi_intensity and brightness changes the keyboard and lightbar colors. Signed-off-by: David Glushkov --- drivers/hid/hid-ids.h | 2 + drivers/hid/hid-steelseries.c | 176 +++++++++++++++++++++++++++++++++- 2 files changed, 176 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 426ff78..83599bd 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -1368,6 +1368,8 @@ #define USB_DEVICE_ID_STEELSERIES_SRWS1 0x1410 #define USB_DEVICE_ID_STEELSERIES_ARCTIS_1 0x12b6 #define USB_DEVICE_ID_STEELSERIES_ARCTIS_9 0x12c2 +#define USB_DEVICE_ID_STEELSERIES_MSI_KLC 0x1122 +#define USB_DEVICE_ID_STEELSERIES_MSI_ALC 0x1161 =20 #define USB_VENDOR_ID_SUN 0x0430 #define USB_DEVICE_ID_RARITAN_KVM_DONGLE 0xcdab diff --git a/drivers/hid/hid-steelseries.c b/drivers/hid/hid-steelseries.c index f984356..0492814 100644 --- a/drivers/hid/hid-steelseries.c +++ b/drivers/hid/hid-steelseries.c @@ -10,16 +10,23 @@ */ =20 #include +#include #include #include #include #include +#include =20 #include "hid-ids.h" =20 #define STEELSERIES_SRWS1 BIT(0) #define STEELSERIES_ARCTIS_1 BIT(1) #define STEELSERIES_ARCTIS_9 BIT(2) +#define STEELSERIES_MSI_RGB BIT(3) + +#define STEELSERIES_HAS_LEDS_MULTICOLOR \ + (IS_BUILTIN(CONFIG_LEDS_CLASS_MULTICOLOR) || \ + (IS_MODULE(CONFIG_LEDS_CLASS_MULTICOLOR) && IS_MODULE(CONFIG_HID_STEELSE= RIES))) =20 struct steelseries_device { struct hid_device *hdev; @@ -34,6 +41,13 @@ struct steelseries_device { uint8_t battery_capacity; bool headset_connected; bool battery_charging; + +#if STEELSERIES_HAS_LEDS_MULTICOLOR + struct led_classdev_mc mc_cdev; + struct mc_subled subled_info[3]; + struct mutex rgb_lock; /* protects rgb_buf */ + u8 *rgb_buf; +#endif }; =20 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \ @@ -528,6 +542,140 @@ static bool steelseries_is_vendor_usage_page(struct h= id_device *hdev, uint8_t us hdev->rdesc[2] =3D=3D 0xff; } =20 +static const struct dmi_system_id steelseries_msi_rgb_dmi_table[] =3D { + { + .matches =3D { + DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International Co., Ltd."), + DMI_MATCH(DMI_PRODUCT_NAME, "Raider A18 HX A9WJG"), + DMI_MATCH(DMI_BOARD_NAME, "MS-182L"), + }, + }, + { } +}; + +static struct usb_device *steelseries_hid_to_usb_dev(struct hid_device *hd= ev) +{ + return interface_to_usbdev(to_usb_interface(hdev->dev.parent)); +} + +static bool steelseries_msi_rgb_is_interface0(struct hid_device *hdev) +{ + return to_usb_interface(hdev->dev.parent) =3D=3D + usb_ifnum_to_if(steelseries_hid_to_usb_dev(hdev), 0); +} + +#if STEELSERIES_HAS_LEDS_MULTICOLOR + +static int steelseries_msi_rgb_set_blocking(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct led_classdev_mc *mc_cdev =3D lcdev_to_mccdev(led_cdev); + struct steelseries_device *sd =3D container_of(mc_cdev, struct steelserie= s_device, mc_cdev); + struct hid_device *hdev =3D sd->hdev; + struct usb_device *udev =3D steelseries_hid_to_usb_dev(hdev); + int i, ret; + u8 r, g, b; + + static const u8 keys[] =3D { + 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, + 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, + 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, + 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, + 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, + 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x33, 0x34, + 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, + 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, + 0x45, 0x46, 0x47, 0x49, 0x4b, 0x4c, 0x4e, 0x4f, + 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, + 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, + 0x60, 0x61, 0x62, 0x63, 0x64, 0x66, 0xe0, 0xe1, + 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xf0 + }; + static const u8 alc_zones[] =3D { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 }; + + mutex_lock(&sd->rgb_lock); + + led_mc_calc_color_components(mc_cdev, brightness); + + r =3D mc_cdev->subled_info[0].brightness; + g =3D mc_cdev->subled_info[1].brightness; + b =3D mc_cdev->subled_info[2].brightness; + + memset(sd->rgb_buf, 0, 524); + sd->rgb_buf[0] =3D 0x0c; + sd->rgb_buf[1] =3D 0x00; + sd->rgb_buf[3] =3D 0x00; + + if (hdev->product =3D=3D USB_DEVICE_ID_STEELSERIES_MSI_KLC) { + sd->rgb_buf[2] =3D 0x66; + for (i =3D 0; i < ARRAY_SIZE(keys); i++) { + sd->rgb_buf[4 + i * 4] =3D keys[i]; + sd->rgb_buf[5 + i * 4] =3D r; + sd->rgb_buf[6 + i * 4] =3D g; + sd->rgb_buf[7 + i * 4] =3D b; + } + } else { + sd->rgb_buf[2] =3D 0x06; + for (i =3D 0; i < ARRAY_SIZE(alc_zones); i++) { + sd->rgb_buf[4 + i * 4] =3D alc_zones[i]; + sd->rgb_buf[5 + i * 4] =3D r; + sd->rgb_buf[6 + i * 4] =3D g; + sd->rgb_buf[7 + i * 4] =3D b; + } + } + + ret =3D usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + HID_REQ_SET_REPORT, + USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, + 0x0300, 0, + sd->rgb_buf, 524, USB_CTRL_SET_TIMEOUT); + + mutex_unlock(&sd->rgb_lock); + return ret < 0 ? ret : 0; +} + +static int steelseries_msi_rgb_register(struct steelseries_device *sd) +{ + struct hid_device *hdev =3D sd->hdev; + struct led_classdev *led_cdev; + + sd->rgb_buf =3D devm_kzalloc(&hdev->dev, 524, GFP_KERNEL); + if (!sd->rgb_buf) + return -ENOMEM; + + mutex_init(&sd->rgb_lock); + + sd->subled_info[0].color_index =3D LED_COLOR_ID_RED; + sd->subled_info[1].color_index =3D LED_COLOR_ID_GREEN; + sd->subled_info[2].color_index =3D LED_COLOR_ID_BLUE; + sd->subled_info[0].intensity =3D 255; + sd->subled_info[1].intensity =3D 255; + sd->subled_info[2].intensity =3D 255; + sd->subled_info[0].channel =3D 0; + sd->subled_info[1].channel =3D 1; + sd->subled_info[2].channel =3D 2; + + sd->mc_cdev.subled_info =3D sd->subled_info; + sd->mc_cdev.num_colors =3D 3; + + led_cdev =3D &sd->mc_cdev.led_cdev; + if (hdev->product =3D=3D USB_DEVICE_ID_STEELSERIES_MSI_KLC) + led_cdev->name =3D "steelseries::kbd_backlight"; + else + led_cdev->name =3D "steelseries::lightbar"; + + led_cdev->max_brightness =3D 255; + led_cdev->brightness_set_blocking =3D steelseries_msi_rgb_set_blocking; + + return devm_led_classdev_multicolor_register(&hdev->dev, &sd->mc_cdev); +} +#else +static int steelseries_msi_rgb_register(struct steelseries_device *sd) +{ + return -ENODEV; +} +#endif + static int steelseries_probe(struct hid_device *hdev, const struct hid_dev= ice_id *id) { struct steelseries_device *sd; @@ -549,6 +697,12 @@ static int steelseries_probe(struct hid_device *hdev, = const struct hid_device_id sd->hdev =3D hdev; sd->quirks =3D id->driver_data; =20 + if (sd->quirks & STEELSERIES_MSI_RGB) { + if (!dmi_check_system(steelseries_msi_rgb_dmi_table) || + !steelseries_msi_rgb_is_interface0(hdev)) + return -ENODEV; + } + ret =3D hid_parse(hdev); if (ret) return ret; @@ -567,7 +721,15 @@ static int steelseries_probe(struct hid_device *hdev, = const struct hid_device_id if (ret) return ret; =20 - if (steelseries_headset_battery_register(sd) < 0) + if (sd->quirks & STEELSERIES_MSI_RGB) { + ret =3D steelseries_msi_rgb_register(sd); + if (ret) + hid_err(hdev, "Failed to register MSI RGB LEDs: %d\n", ret); + return ret; + } + + if (sd->quirks & (STEELSERIES_ARCTIS_1 | STEELSERIES_ARCTIS_9) && + steelseries_headset_battery_register(sd) < 0) hid_err(sd->hdev, "Failed to register battery for headset\n"); =20 @@ -635,7 +797,7 @@ static int steelseries_headset_raw_event(struct hid_dev= ice *hdev, unsigned long flags; =20 /* Not a headset */ - if (hdev->product =3D=3D USB_DEVICE_ID_STEELSERIES_SRWS1) + if (!(sd->quirks & (STEELSERIES_ARCTIS_1 | STEELSERIES_ARCTIS_9))) return 0; =20 if (hdev->product =3D=3D USB_DEVICE_ID_STEELSERIES_ARCTIS_1) { @@ -732,6 +894,16 @@ static const struct hid_device_id steelseries_devices[= ] =3D { HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_ARC= TIS_9), .driver_data =3D STEELSERIES_ARCTIS_9 }, =20 +#if STEELSERIES_HAS_LEDS_MULTICOLOR + { /* MSI Raider A18 KLC */ + HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_MSI= _KLC), + .driver_data =3D STEELSERIES_MSI_RGB }, + + { /* MSI Raider A18 ALC */ + HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_MSI= _ALC), + .driver_data =3D STEELSERIES_MSI_RGB }, +#endif + { } }; MODULE_DEVICE_TABLE(hid, steelseries_devices); --=20 2.54.0