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Jones" , Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Denis Benato , Antheas Kapenekakis Subject: [PATCH v10 08/11] HID: asus: listen to the asus-wmi brightness device instead of creating one Date: Sat, 22 Nov 2025 12:00:29 +0100 Message-ID: <20251122110032.4274-9-lkml@antheas.dev> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251122110032.4274-1-lkml@antheas.dev> References: <20251122110032.4274-1-lkml@antheas.dev> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-PPP-Message-ID: <176380926838.360513.10482885573087796138@linux3247.grserver.gr> X-PPP-Vhost: antheas.dev X-Virus-Scanned: clamav-milter 1.4.3 at linux3247.grserver.gr X-Virus-Status: Clean 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 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 461b0f8efdfb..475e34187326 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 check */ #include @@ -103,7 +102,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); #define TRKID_SGN ((TRKID_MAX + 1) >> 1) struct asus_kbd_leds { - struct led_classdev cdev; + struct asus_hid_listener listener; struct hid_device *hdev; struct work_struct work; unsigned int brightness; @@ -493,11 +492,11 @@ static void asus_schedule_work(struct asus_kbd_leds *led) spin_unlock_irqrestore(&led->lock, flags); } -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 = container_of(led_cdev, struct asus_kbd_leds, - cdev); + struct asus_kbd_leds *led = container_of(listener, struct asus_kbd_leds, + listener); unsigned long flags; spin_lock_irqsave(&led->lock, flags); @@ -507,20 +506,6 @@ static void asus_kbd_backlight_set(struct led_classdev *led_cdev, asus_schedule_work(led); } -static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev) -{ - struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds, - cdev); - enum led_brightness brightness; - unsigned long flags; - - spin_lock_irqsave(&led->lock, flags); - brightness = 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 = container_of(work, struct asus_kbd_leds, work); @@ -537,34 +522,6 @@ static void asus_kbd_backlight_work(struct work_struct *work) hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret); } -/* 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 = 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 = 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 section. * Example strings: FGA80100.RC72LA.312_T01, FGA80100.RC71LS.318_T01 @@ -709,14 +666,11 @@ static int asus_kbd_register_leds(struct hid_device *hdev) drvdata->kbd_backlight->removed = false; drvdata->kbd_backlight->brightness = 0; drvdata->kbd_backlight->hdev = hdev; - drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight"; - drvdata->kbd_backlight->cdev.max_brightness = 3; - drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set; - drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get; + drvdata->kbd_backlight->listener.brightness_set = asus_kbd_backlight_set; INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work); spin_lock_init(&drvdata->kbd_backlight->lock); - ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev); + ret = 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); @@ -1105,7 +1059,7 @@ static int __maybe_unused asus_resume(struct hid_device *hdev) { if (drvdata->kbd_backlight) { const u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, - drvdata->kbd_backlight->cdev.brightness }; + drvdata->kbd_backlight->brightness }; ret = asus_kbd_set_report(hdev, buf, sizeof(buf)); if (ret < 0) { hid_err(hdev, "Asus failed to set keyboard backlight: %d\n", ret); @@ -1231,7 +1185,6 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id) } 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"); @@ -1278,6 +1231,8 @@ static void asus_remove(struct hid_device *hdev) unsigned long flags; if (drvdata->kbd_backlight) { + asus_hid_unregister_listener(&drvdata->kbd_backlight->listener); + spin_lock_irqsave(&drvdata->kbd_backlight->lock, flags); drvdata->kbd_backlight->removed = true; spin_unlock_irqrestore(&drvdata->kbd_backlight->lock, flags); -- 2.52.0