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DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1781542271; 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: in-reply-to:in-reply-to:references:references; bh=yrBdewlbTtPAYzvcUiurbNAHzc+dEGj6jAZGiLVdYRQ=; b=g3UMKI6WYhdI9Pzwo7VWr9stU74uBn51ZDx1b0qSTulkF+eFIFYtEvfzgvqx7c4skFRgNC Zayl3zLYuueF23q5q/eo3u/Eq5bO1fy4T3SgVO73GwWFPqG6g+HAtmEfzU8fqRETMBK8DL PxG8AWow7ohpKzfYvaMX4Vt/yEFcFGA= From: Denis Benato To: linux-kernel@vger.kernel.org Cc: linux-input@vger.kernel.org, "Benjamin Tissoires" , "Jiri Kosina" , "Luke D . Jones" , "Mateusz Schyboll" , "Denis Benato" , "Denis Benato" , "Antheas Kapenekakis" , "Connor Belli" Subject: [PATCH v4 4/5] HID: asus: add support for xgm led Date: Mon, 15 Jun 2026 16:50:57 +0000 Message-ID: <20260615165058.3845-5-denis.benato@linux.dev> In-Reply-To: <20260615165058.3845-1-denis.benato@linux.dev> References: <20260615165058.3845-1-denis.benato@linux.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-Migadu-Flow: FLOW_OUT XG mobile stations have very bright leds behind the fan that can be turned either ON or OFF: add a cled interface to allow controlling the brightness of those red leds. Signed-off-by: Denis Benato --- drivers/hid/hid-asus.c | 91 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c index 6896730efafc..e68a6d93369d 100644 --- a/drivers/hid/hid-asus.c +++ b/drivers/hid/hid-asus.c @@ -51,6 +51,8 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); #define FEATURE_KBD_LED_REPORT_ID1 0x5d #define FEATURE_KBD_LED_REPORT_ID2 0x5e +#define ROG_XGM_REPORT_SIZE 300 + #define ROG_ALLY_REPORT_SIZE 64 #define ROG_ALLY_X_MIN_MCU 313 #define ROG_ALLY_MIN_MCU 319 @@ -143,6 +145,11 @@ struct asus_worker { bool removed; }; +struct asus_xgm_led { + struct led_classdev cdev; + struct hid_device *hdev; +}; + struct asus_touchpad_info { int max_x; int max_y; @@ -169,6 +176,7 @@ struct asus_drvdata { unsigned long battery_next_query; struct asus_hid_listener listener; bool fn_lock; + struct asus_xgm_led *xgm_led; }; static int asus_report_battery(struct asus_drvdata *, u8 *, int); @@ -1119,6 +1127,26 @@ static int asus_battery_probe(struct hid_device *hdev) return ret; } +static int asus_xgm_led_set(struct led_classdev *led_cdev, enum led_brightness value) +{ + const u8 buf[ROG_XGM_REPORT_SIZE] = { + FEATURE_KBD_LED_REPORT_ID2, 0xC5, (value) ? 0x50 : 0x00 + }; + struct asus_xgm_led *xgm = container_of(led_cdev, struct asus_xgm_led, cdev); + int ret; + + ret = asus_kbd_set_report(xgm->hdev, buf, ROG_XGM_REPORT_SIZE); + if (ret < 0) { + hid_err(xgm->hdev, "Unable to set XG mobile led state: %d\n", ret); + return ret; + } else if (ret != ROG_XGM_REPORT_SIZE) { + hid_err(xgm->hdev, "Unexpected partial transfer to XG mobile: %d\n", ret); + return -EIO; + } + + return 0; +} + static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi) { struct input_dev *input = hi->input; @@ -1343,9 +1371,52 @@ static int asus_start_multitouch(struct hid_device *hdev) return 0; } +static int asus_xgm_init(struct hid_device *hdev, struct asus_drvdata *drvdata) +{ + const char *name; + int ret; + + drvdata->xgm_led = devm_kzalloc(&hdev->dev, sizeof(*drvdata->xgm_led), GFP_KERNEL); + if (drvdata->xgm_led == NULL) + return -ENOMEM; + + name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "asus:xgm-%s:led", + strlen(hdev->uniq) ? hdev->uniq : dev_name(&hdev->dev)); + + if (name == NULL) { + ret = -ENOMEM; + goto asus_xgm_init_err; + } + + drvdata->xgm_led->hdev = hdev; + drvdata->xgm_led->cdev.name = name; + drvdata->xgm_led->cdev.brightness = 1; + drvdata->xgm_led->cdev.max_brightness = 1; + drvdata->xgm_led->cdev.brightness_set_blocking = asus_xgm_led_set; + + /* LED state is arbitrary on boot, set a default */ + ret = asus_xgm_led_set(&drvdata->xgm_led->cdev, drvdata->xgm_led->cdev.brightness); + if (ret) { + hid_err(hdev, "Asus failed to set xgm led: %d\n", ret); + goto asus_xgm_init_err; + } + + ret = devm_led_classdev_register(&hdev->dev, &drvdata->xgm_led->cdev); + if (ret) { + hid_err(hdev, "Asus failed to register xgm led: %d\n", ret); + goto asus_xgm_init_err; + } + + return 0; +asus_xgm_init_err: + drvdata->xgm_led = NULL; + return ret; +} + static int __maybe_unused asus_resume(struct hid_device *hdev) { struct asus_drvdata *drvdata = hid_get_drvdata(hdev); + int ret; /* * If we have a backlight listener registered, restore the previous state, @@ -1355,7 +1426,17 @@ static int __maybe_unused asus_resume(struct hid_device *hdev) if (drvdata->listener.brightness_set) asus_kbd_backlight_set(&drvdata->listener, drvdata->kbd_backlight_brightness); + if (drvdata->xgm_led) { + ret = asus_xgm_led_set(&drvdata->xgm_led->cdev, drvdata->xgm_led->cdev.brightness); + if (ret) { + hid_err(hdev, "Asus failed to restore xgm brightness: %d\n", ret); + goto asus_resume_err; + } + } + return 0; +asus_resume_err: + return ret; } static int __maybe_unused asus_reset_resume(struct hid_device *hdev) @@ -1484,6 +1565,16 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id) } } + if (asus_has_report_id(hdev, FEATURE_KBD_REPORT_ID) && + ((hdev->product == USB_DEVICE_ID_ASUSTEK_XGM_2022) || + (hdev->product == USB_DEVICE_ID_ASUSTEK_XGM_2023))) { + ret = asus_xgm_init(hdev, drvdata); + if (ret) { + hid_err(hdev, "Failed to initialize xg mobile: %d\n", ret); + goto err_stop_hw; + } + } + /* Laptops keyboard backlight is always at 0x5a */ if (is_vendor && (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT) && (asus_has_report_id(hdev, FEATURE_KBD_REPORT_ID)) && -- 2.47.3