From nobody Sat Feb 7 14:15:36 2026 Received: from relay13.grserver.gr (relay13.grserver.gr [178.156.171.147]) (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 2F847480977; Thu, 22 Jan 2026 07:51:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.156.171.147 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769068296; cv=none; b=qVV9LfCAmvm3rWemYrUlOLBy5G36ddKl+tASH+UWAn+jFuHg4sAaMAIv9fpUbTqRAHeUtFD0hw7WK9Qknx985J3seMtozBxV0NBgJo6lqpYkmV/ox9h5i+10OUEZUFFzKrvFxtCt6+D+AhbFJqT5JNulrEEzCs0fSKKoyKBSHoA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769068296; c=relaxed/simple; bh=7RssO4ZHJ9ExvT8TBJaUPIS2+RXWhIYngKDis/HcGG0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gmAUtEpnwVEDmPK7rKjZQAR9xsT/GNMudyOzQTzkR/4f7pF763Okgy8CI+Xw3JVNQ5b3LvtibOl2xD3ITi05eQh0FJND0QWBqMslGy2afHiSGAQe1nLVnHXkNgSiIkdNNTuA0WM43WE44E+oOtyxHJn07aZ6RmxWt8/PtvwaiX0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=antheas.dev; spf=pass smtp.mailfrom=antheas.dev; dkim=pass (2048-bit key) header.d=antheas.dev header.i=@antheas.dev header.b=RPvOJGjz; arc=none smtp.client-ip=178.156.171.147 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=antheas.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=antheas.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=antheas.dev header.i=@antheas.dev header.b="RPvOJGjz" Received: from relay13 (localhost [127.0.0.1]) by relay13.grserver.gr (Proxmox) with ESMTP id C466B5E6B5; Thu, 22 Jan 2026 09:51:15 +0200 (EET) Received: from linux3247.grserver.gr (linux3247.grserver.gr [213.158.90.240]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by relay13.grserver.gr (Proxmox) with ESMTPS id 0B7D95E678; Thu, 22 Jan 2026 09:51:15 +0200 (EET) Received: from antheas-z13 (unknown [IPv6:2a05:f6c3:fefd:0:42c:a43d:2848:c282]) by linux3247.grserver.gr (Postfix) with ESMTPSA id 023FB1FDB07; Thu, 22 Jan 2026 09:51:12 +0200 (EET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=antheas.dev; s=default; t=1769068274; bh=jJ765pdRRRMW2RpNe/iPodWF4kvE/0JGDpokeldlPDU=; h=From:To:Subject; b=RPvOJGjzxJUPGH/oJe7hzomTcbm/9cNVrGLFZY/V5ZNna4//vx+EJo5l261XwtrwV 0oJYNpfDX0aHhf2uZYgWYHrImRsu6ExiDDJ9aF+0IdmYUaXNSX+f7TGj9aN1PCeAwS sXeCPxgk0wZlvfWvPmd4PjAHhaR6rWiUvjeyXqHdWNWSjV48mhSB3anNUmd2VFOFcN 0PgP0P4A0Lvf7VSh4e7JByuAAVpux49FFmnxoxSArwXBW7nISr4uYyaF4UgBwYM8T2 flYUbr8zeaqSOB96lbX6ScQuZtUaxjT5trExVFAsgPMc05WfiHbccJexYKt8FKlORS ZBkW1sUNeo6VA== Authentication-Results: linux3247.grserver.gr; spf=pass (sender IP is 2a05:f6c3:fefd:0:42c:a43d:2848:c282) smtp.mailfrom=lkml@antheas.dev smtp.helo=antheas-z13 Received-SPF: pass (linux3247.grserver.gr: connection is authenticated) From: Antheas Kapenekakis To: platform-driver-x86@vger.kernel.org, linux-input@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Jiri Kosina , Benjamin Tissoires , Corentin Chary , "Luke D . Jones" , Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Denis Benato , Antheas Kapenekakis , Denis Benato Subject: [PATCH v12 08/11] HID: asus: listen to the asus-wmi brightness device instead of creating one Date: Thu, 22 Jan 2026 08:50:41 +0100 Message-ID: <20260122075044.5070-9-lkml@antheas.dev> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260122075044.5070-1-lkml@antheas.dev> References: <20260122075044.5070-1-lkml@antheas.dev> 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 X-PPP-Message-ID: <176906827387.715178.11433333159957033256@linux3247.grserver.gr> X-PPP-Vhost: antheas.dev X-Virus-Scanned: clamav-milter 1.4.3 at linux3247.grserver.gr X-Virus-Status: Clean Content-Type: text/plain; charset="utf-8" Some ROG laptops expose multiple interfaces for controlling the keyboard/RGB brightness. This creates a name conflict under asus::kbd_brightness, where the second device ends up being named asus::kbd_brightness_1 and they are both broken. Therefore, register a listener to the asus-wmi brightness device instead of creating a new one. Reviewed-by: Luke D. Jones Reviewed-by: Benjamin Tissoires Reviewed-by: Denis Benato Acked-by: Benjamin Tissoires Signed-off-by: Antheas Kapenekakis --- drivers/hid/hid-asus.c | 65 +++++++----------------------------------- 1 file changed, 10 insertions(+), 55 deletions(-) diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c index 6084ec66a134..415629ebee15 100644 --- a/drivers/hid/hid-asus.c +++ b/drivers/hid/hid-asus.c @@ -27,7 +27,6 @@ #include #include #include -#include #include #include /* For to_usb_interface for T100 touchpad intf chec= k */ #include @@ -103,7 +102,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); #define TRKID_SGN ((TRKID_MAX + 1) >> 1) =20 struct asus_kbd_leds { - struct led_classdev cdev; + struct asus_hid_listener listener; struct hid_device *hdev; struct work_struct work; unsigned int brightness; @@ -495,11 +494,11 @@ static void asus_schedule_work(struct asus_kbd_leds *= led) spin_unlock_irqrestore(&led->lock, flags); } =20 -static void asus_kbd_backlight_set(struct led_classdev *led_cdev, - enum led_brightness brightness) +static void asus_kbd_backlight_set(struct asus_hid_listener *listener, + int brightness) { - struct asus_kbd_leds *led =3D container_of(led_cdev, struct asus_kbd_leds, - cdev); + struct asus_kbd_leds *led =3D container_of(listener, struct asus_kbd_leds, + listener); unsigned long flags; =20 spin_lock_irqsave(&led->lock, flags); @@ -509,20 +508,6 @@ static void asus_kbd_backlight_set(struct led_classdev= *led_cdev, asus_schedule_work(led); } =20 -static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led= _cdev) -{ - struct asus_kbd_leds *led =3D container_of(led_cdev, struct asus_kbd_leds, - cdev); - enum led_brightness brightness; - unsigned long flags; - - spin_lock_irqsave(&led->lock, flags); - brightness =3D led->brightness; - spin_unlock_irqrestore(&led->lock, flags); - - return brightness; -} - static void asus_kbd_backlight_work(struct work_struct *work) { struct asus_kbd_leds *led =3D container_of(work, struct asus_kbd_leds, wo= rk); @@ -539,34 +524,6 @@ static void asus_kbd_backlight_work(struct work_struct= *work) hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret); } =20 -/* 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) -{ - struct asus_drvdata *drvdata =3D hid_get_drvdata(hdev); - u32 value; - int ret; - - if (!IS_ENABLED(CONFIG_ASUS_WMI)) - return false; - - if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD && - dmi_check_system(asus_use_hid_led_dmi_ids)) { - hid_info(hdev, "using HID for asus::kbd_backlight\n"); - return false; - } - - ret =3D asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, - 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); -} - /* * We don't care about any other part of the string except the version sec= tion. * Example strings: FGA80100.RC72LA.312_T01, FGA80100.RC71LS.318_T01 @@ -706,14 +663,11 @@ static int asus_kbd_register_leds(struct hid_device *= hdev) drvdata->kbd_backlight->removed =3D false; drvdata->kbd_backlight->brightness =3D 0; drvdata->kbd_backlight->hdev =3D hdev; - drvdata->kbd_backlight->cdev.name =3D "asus::kbd_backlight"; - drvdata->kbd_backlight->cdev.max_brightness =3D 3; - drvdata->kbd_backlight->cdev.brightness_set =3D asus_kbd_backlight_set; - drvdata->kbd_backlight->cdev.brightness_get =3D asus_kbd_backlight_get; + drvdata->kbd_backlight->listener.brightness_set =3D asus_kbd_backlight_se= t; INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work); spin_lock_init(&drvdata->kbd_backlight->lock); =20 - ret =3D devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->c= dev); + ret =3D asus_hid_register_listener(&drvdata->kbd_backlight->listener); if (ret < 0) { /* No need to have this still around */ devm_kfree(&hdev->dev, drvdata->kbd_backlight); @@ -1102,7 +1056,7 @@ static int __maybe_unused asus_resume(struct hid_devi= ce *hdev) { =20 if (drvdata->kbd_backlight) { const u8 buf[] =3D { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, - drvdata->kbd_backlight->cdev.brightness }; + drvdata->kbd_backlight->brightness }; ret =3D asus_kbd_set_report(hdev, buf, sizeof(buf)); if (ret < 0) { hid_err(hdev, "Asus failed to set keyboard backlight: %d\n", ret); @@ -1228,7 +1182,6 @@ static int asus_probe(struct hid_device *hdev, const = struct hid_device_id *id) } =20 if (is_vendor && (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT) && - !asus_kbd_wmi_led_control_present(hdev) && asus_kbd_register_leds(hdev)) hid_warn(hdev, "Failed to initialize backlight.\n"); =20 @@ -1275,6 +1228,8 @@ static void asus_remove(struct hid_device *hdev) unsigned long flags; =20 if (drvdata->kbd_backlight) { + asus_hid_unregister_listener(&drvdata->kbd_backlight->listener); + spin_lock_irqsave(&drvdata->kbd_backlight->lock, flags); drvdata->kbd_backlight->removed =3D true; spin_unlock_irqrestore(&drvdata->kbd_backlight->lock, flags); --=20 2.52.0