From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yx1-f50.google.com (mail-yx1-f50.google.com [74.125.224.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E2910481AAD for ; Wed, 10 Jun 2026 15:53:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.224.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781106838; cv=none; b=Sy4sa+cclkem+0jsGdOGwSQYyY/wOWL5ijMyQDvEJ0hrrFRnkhGApLi3338jW3H2tkWWVVLCSQiXvX47etcrNAIX6wkCmSGuqT/d3CRC+ANr0M/WEEufQFG9RrYn5wqFdPdSMmpXYoqUdPMerShlEKuMipop63+trD98bkMat0Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781106838; c=relaxed/simple; bh=5mmC7/EEkH2R+OYoEL6Seg4VZQgLla6m5f2R8wu44Jg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=W+yeozgL/eWPwbYuYth/Qyg2ozNHstLtWGoMrUyGZDmnhENv9FSigfizVQy1zaG9gTbZDOgeB+PXb7dT4pdhXDbTvbzwYPzF4nugIBt3qAmLaw3bBRI3SL/WgbmhWhtuBjSOZ6q9jhX3VXjUI4M/NJ/vcGZMpPtRM1uJ5ifWP+Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=p76VcJFE; arc=none smtp.client-ip=74.125.224.50 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="p76VcJFE" Received: by mail-yx1-f50.google.com with SMTP id 956f58d0204a3-660323f7b27so7185005d50.3 for ; Wed, 10 Jun 2026 08:53:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1781106836; x=1781711636; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=41XKt+YCXkBH/hAuN9prPW32J8am1IH9vpCtWPjkkv8=; b=p76VcJFEfq4HLZ0lMejm58lngEHIpIEQTVA3ei66lDuhOifx9rW+/gAPV/9KWH0hOq 6SnGaAEOI2XeHN+xw6oeQdEk4hYSj4HFadrV6WmXPhoBVEX9S77l5dYNEz9eKTlCUbiI eh5A4FJLKhohyuO1sAdd6S8V5t7SXs5p3M8iX9rxOpdAhoyqR/frHd/IPzkPt7I2UO0u 8ZKBNy8FzAsoIIHdMIfG4BcW6eswejKWjZZVIbv7Xd6fjiMoAi13+gok5qZsagQ/J0nx p0ikftLCTgq2BwGYXQ/AtlWTMq74yTx70PdAfIRbXGhoofXX+ndPKLmtsxvoopAd77xN 6SGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781106836; x=1781711636; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=41XKt+YCXkBH/hAuN9prPW32J8am1IH9vpCtWPjkkv8=; b=U2rbgurxp7lv/eWHyO+q5/rn3nGwsVeslDkvNoUA2N+K4ch4JKT1kE85LNGgJ5B/MJ TWLL5IMATQdf8m5I5tyneuPIzSnuOEudtVqZMZsiwGCa2YQpNx2bDSOc1r/LF0dODUg3 oAeN6v0xWPUM8sKbSx7PghrujvmgZT82eDNUdkI6iqBfNOkeh1PRrYPugz9yr+kL1P6c NiUm/OQNqvb1Stmv+ApTVxOH4IjHsS5MtulZ7qf2DkD/uOh6sDAtlgdX3/nodQe5QRj8 9BfVC6Kna8nzJivLyr5HOIITEMmRqEgUTcgTb/k6bGkVvX+l3n+XlCmIaI95IV++8Cvz NYTA== X-Gm-Message-State: AOJu0YxGfy1KDxV+NaxugbQXtWkxg84sO/2XSnUMYlfhrQ0U33vqmrHM Cauft+wdHvI7OsGjv6fwJm4N8lMmUHFr4lRTLPO5/3sI3FCUplyMkB/DiIr59uh7 X-Gm-Gg: Acq92OEJLTGfYiumq2fBoro6x9UKnFliqgaOyI19EqltqZc5eHWyK030V3winss9Mgy 94/DfiqcYv4Smr18Aphlgqh1Z0DWMqkwk1la8KuESnTbR4OdtCTa5BQuijTrYBhV6YFDUFvB/Hg xn+8qhJpHmv5TlvPC5rhx1zq505vwEmFX78z6iKUN3s7QAqO/HlOXwPVUo+lm4/cEkrex7DmP2p RUT1pjC8FFxTkt7cg7TND1uV73yx8vsN9g557bLYweM0dIFp3Sug8AqPOJUFwaE9kwBrQHvg3/M 2i71Bfrr7ITJ854irNDx85x+51hjWUQn9Cx6VD/awN2K2H0E7dy7JFlGNlzLPE1OCw2GjuxVZJD nlzPIU6ZbNPPMZ16hccgoPsCH6rU1N6qGUlH82yIJoaVMr7bhSihvKBvl4A/qvvOkByfQyheROT xliP9BI4Exs1JkS3/ni/lMbFfpu9R/ X-Received: by 2002:a05:690e:1919:b0:660:a41d:d175 with SMTP id 956f58d0204a3-66106f87be3mr23326609d50.55.1781106835606; Wed, 10 Jun 2026 08:53:55 -0700 (PDT) Received: from fedora ([164.86.10.141]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-660d62046fasm12573759d50.13.2026.06.10.08.53.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Jun 2026 08:53:55 -0700 (PDT) From: Dave Carey To: platform-driver-x86@vger.kernel.org Cc: ilpo.jarvinen@linux.intel.com, hansg@kernel.org Subject: [PATCH v8 2/2] platform/x86/lenovo: Add Yoga Book 9 keyboard dock detection driver Date: Wed, 10 Jun 2026 11:53:40 -0400 Message-ID: <20260610155340.342949-3-carvsdriver@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260610155340.342949-1-carvsdriver@gmail.com> References: <20260610155340.342949-1-carvsdriver@gmail.com> Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Lenovo Yoga Book 9 14IAH10 ships with a detachable Bluetooth keyboard that magnetically attaches to the bottom (secondary) screen in one of two positions. The Embedded Controller tracks the attachment state in a 2-bit field called BKBD and signals changes via WMI event GUID 806BD2A2-177B-481D-BFB5-3BA0BB4A2285 (notify ID 0xEB on the WM10 ACPI device, _UID "GMZN"). The device contains embedded BMOF data (WQDD, 20705 bytes) documenting both WMI interfaces used by this driver: LENOVO_BTKBD_EVENT (event GUID): WmiDataId(1) uint32 Status. The ACPI _WED(0xEB) method returns EC.BKBD directly as an integer, so the notify callback receives BKBD without a separate query. LENOVO_FEATURE_STATUS_DATA (block GUID, WQAF method): returns an 8-byte buffer {uint32 IDs=0x00060000, uint32 Status=BKBD}. Used for the initial state read on probe and after resume. BKBD encoding: 0 = keyboard detached 1 = keyboard docked on top half of bottom screen 2 = keyboard docked on bottom half of bottom screen 3 = reserved (not observed in practice) This driver: - Registers two WMI drivers: one on the event GUID (LENOVO_BTKBD_EVENT) and one on the block GUID (LENOVO_FEATURE_STATUS_DATA). - On probe, reads initial BKBD state via wmidev_query_block() on the block device; whichever driver probes last triggers the initial read. - On WMI notification, reads BKBD directly from the event data integer (ACPI _WED(0xEB) returns EC.BKBD) without a redundant WQAF call. - Reports SW_TABLET_MODE=1 when detached, SW_TABLET_MODE=0 when docked in either position (a physical keyboard is present in both cases). - Exposes the raw BKBD value via read-only sysfs attribute "keyboard_position". - Re-reads BKBD state on resume from suspend or hibernation. Tested on: Lenovo Yoga Book 9 14IAH10 (model 83KJ), kernel 7.0. Signed-off-by: Dave Carey --- v8: - Add #include (required for GENMASK). - Add #include (explicit include for dev_warn/dev_dbg). - Use __MUTEX_INITIALIZER(yb9.lock) for static mutex initialization; removes mutex_init() call and the need for mutex_destroy(). - Update wmidev_query_block() call to pass min_size=8; remove manual length check that is now handled by the WMI core. - Move u8 *data __free(kfree) declaration to immediately after the successful wmidev_query_block() call (cleanup.h convention). - Change data type from void * to u8 * to allow pointer arithmetic without cast. - Remove (int) cast from FIELD_GET() return value. - Remove blank line between yb9_kbdock_query_locked() call and error check in keyboard_position_show(). - Use %d format specifier in sysfs_emit(); remove (unsigned int) cast. v7: - Use wmidev_query_block() in place of deprecated wmidev_block_query(). Use __free(kfree) to manage the output buffer; simplify the parsing to a single length check now that the WMI core handles type conversion. - Define BKBD_FIELD with GENMASK() and extract the field with FIELD_GET() instead of open-coded masking. - Use guard(mutex) for all lock/unlock pairs. - Add yb9_kbdock_sync_locked() helper to consolidate the duplicated initial-state read pattern in event_probe, block_probe, and resume. - Add linux/bitfield.h, linux/cleanup.h, linux/slab.h includes. - Fix comment on struct mutex field; use Context:/Returns: sections in the kerneldoc comment for yb9_kbdock_query_locked(). v6: - Submitted as 2/2; patch 1/2 adds a DMI early-exit to lenovo-ymc to prevent duplicate SW_TABLET_MODE input nodes on the YB9. v5: - Rewrote as two WMI drivers (event + block) to avoid the deprecated wmi_query_block() API: event driver owns the GUID that delivers notifications, block driver owns the GUID used for querying state. Either can probe first; both probe callbacks check whether the other has already probed and fire the initial read when both are ready. - Use wmidev_block_query() on the block wmi_device directly (replaces the deprecated wmi_query_block()). - In the notify callback, read BKBD directly from the event data integer passed by the WMI core (_WED(0xEB) returns EC.BKBD; confirmed by decoding the embedded BMOF from WQDD). Eliminates the redundant WQAF call that v4 made on every notification. - Documented the two BMOF classes (LENOVO_BTKBD_EVENT and LENOVO_FEATURE_STATUS_DATA) with field layouts in the commit message and file header. - sysfs keyboard_position: output bare integer, drop the parenthetical position-name suffix that a couple of reviewers found non-standard. - Set .no_singleton = true on both WMI drivers (was missing from block driver in v4). - Add PM resume callback (yb9_kbdock_resume) to re-read BKBD state after suspend/hibernation. v4: - Dropped module_wmi_driver(); registered two WMI drivers manually to allow sharing state. module_init/exit pair registers/unregisters both. - Added ATTRIBUTE_GROUPS() and .dev_groups for the sysfs attribute. - sysfs show: performed a live query instead of returning a cached value. v3: - Switched to devm_input_allocate_device(). - Added DMI guard (dmi_check_system) to reject non-YB9 machines. - Removed redundant MODULE_DEVICE_TABLE on block driver. v2: - Added .no_singleton = true on the event WMI driver. - Added PM suspend/resume skeleton. - Fixed MODULE_LICENSE to "GPL" (was "GPL v2"). .../testing/sysfs-driver-lenovo-yb9-kbdock | 19 ++ MAINTAINERS | 7 + drivers/platform/x86/lenovo/Kconfig | 14 + drivers/platform/x86/lenovo/Makefile | 1 + drivers/platform/x86/lenovo/yb9-kbdock.c | 312 ++++++++++++++++++ 5 files changed, 353 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-driver-lenovo-yb9-kbdock create mode 100644 drivers/platform/x86/lenovo/yb9-kbdock.c diff --git a/Documentation/ABI/testing/sysfs-driver-lenovo-yb9-kbdock b/Documentation/ABI/testing/sysfs-driver-lenovo-yb9-kbdock new file mode 100644 index 0000000..04e5293 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-lenovo-yb9-kbdock @@ -0,0 +1,19 @@ +What: /sys/bus/wmi/drivers/lenovo-yb9-kbdock//keyboard_position +Date: April 2026 +KernelVersion: 6.10 +Contact: Dave Carey +Description: + Read-only attribute reporting the current keyboard dock position + as reported by the Embedded Controller on the Lenovo Yoga Book 9 + 14IAH10. + + Possible values: + + == ============================================================= + 0 keyboard is not docked to any screen (detached) + 1 keyboard docked on the top half of the bottom screen + 2 keyboard docked on the bottom half of the bottom screen + == ============================================================= + + SW_TABLET_MODE input events are also emitted: 0 when the keyboard + is docked (either position), 1 when detached. diff --git a/MAINTAINERS b/MAINTAINERS index d1cc0e1..00e8275 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14479,6 +14479,13 @@ L: platform-driver-x86@vger.kernel.org S: Maintained F: drivers/platform/x86/lenovo/wmi-hotkey-utilities.c +LENOVO YOGA BOOK 9 KEYBOARD DOCK DRIVER +M: Dave Carey +L: platform-driver-x86@vger.kernel.org +S: Maintained +F: Documentation/ABI/testing/sysfs-driver-lenovo-yb9-kbdock +F: drivers/platform/x86/lenovo/yb9-kbdock.c + LETSKETCH HID TABLET DRIVER M: Hans de Goede L: linux-input@vger.kernel.org diff --git a/drivers/platform/x86/lenovo/Kconfig b/drivers/platform/x86/lenovo/Kconfig index 9c48487..938b361 100644 --- a/drivers/platform/x86/lenovo/Kconfig +++ b/drivers/platform/x86/lenovo/Kconfig @@ -43,6 +43,20 @@ config LENOVO_WMI_CAMERA To compile this driver as a module, choose M here: the module will be called lenovo-wmi-camera. +config LENOVO_YB9_KBDOCK + tristate "Lenovo Yoga Book 9 keyboard dock detection" + depends on ACPI_WMI + depends on DMI + depends on INPUT + help + Say Y here to enable keyboard dock detection on the Lenovo Yoga Book 9 + 14IAH10. The detachable Bluetooth keyboard magnetically attaches to + either screen; this driver reports SW_TABLET_MODE input events based + on the attachment state and exposes the raw position in sysfs. + + To compile this driver as a module, choose M here: the module will be + called lenovo-yb9-kbdock. + config LENOVO_YMC tristate "Lenovo Yoga Tablet Mode Control" depends on ACPI_WMI diff --git a/drivers/platform/x86/lenovo/Makefile b/drivers/platform/x86/lenovo/Makefile index 7b2128e..2842d7d 100644 --- a/drivers/platform/x86/lenovo/Makefile +++ b/drivers/platform/x86/lenovo/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_THINKPAD_LMI) += think-lmi.o obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o lenovo-target-$(CONFIG_LENOVO_WMI_HOTKEY_UTILITIES) += wmi-hotkey-utilities.o +lenovo-target-$(CONFIG_LENOVO_YB9_KBDOCK) += yb9-kbdock.o lenovo-target-$(CONFIG_LENOVO_YMC) += ymc.o lenovo-target-$(CONFIG_YOGABOOK) += yogabook.o lenovo-target-$(CONFIG_YT2_1380) += yoga-tab2-pro-1380-fastcharger.o diff --git a/drivers/platform/x86/lenovo/yb9-kbdock.c b/drivers/platform/x86/lenovo/yb9-kbdock.c new file mode 100644 index 0000000..f00e5d4 --- /dev/null +++ b/drivers/platform/x86/lenovo/yb9-kbdock.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Lenovo Yoga Book 9 keyboard-dock detection + * + * The Yoga Book 9 ships with a detachable Bluetooth keyboard that magnetically + * attaches to the bottom screen in one of two positions. The EC tracks + * attachment state in a 2-bit field called BKBD and signals changes via WMI + * event 0xEB on the WM10 ACPI device (_UID "GMZN"). + * + * BKBD values: + * 0 = keyboard detached + * 1 = keyboard docked on the top half of the bottom screen + * 2 = keyboard docked on the bottom half of the bottom screen + * 3 = reserved / not observed + * + * Two WMI interfaces are used (documented in embedded BMOF, WQDD, 20705 bytes): + * + * LENOVO_BTKBD_EVENT (event GUID, 806BD2A2-...) + * WmiDataId(1) uint32 Status — _WED(0xEB) returns EC.BKBD directly. + * The notify callback receives BKBD as an integer; no separate query needed. + * + * LENOVO_FEATURE_STATUS_DATA (block GUID, E7F300FA-...) + * WmiDataId(1) uint32 IDs = 0x00060000 (feature selector) + * WmiDataId(2) uint32 Status = BKBD value + * Used on probe and resume to read initial state. + * + * SW_TABLET_MODE=1 is reported when the keyboard is detached; + * SW_TABLET_MODE=0 when docked in either position (keyboard present). + * The raw BKBD value is exposed via the sysfs attribute "keyboard_position". + * + * Copyright (C) 2026 Dave Carey + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define YB9_KBDOCK_EVENT_GUID "806BD2A2-177B-481D-BFB5-3BA0BB4A2285" +#define YB9_KBDOCK_QUERY_GUID "E7F300FA-21CD-4003-ADAC-2696135982E6" + +/* 2-bit EC field encoding the keyboard dock position */ +#define BKBD_FIELD GENMASK(1, 0) + +/* BKBD encoding */ +#define BKBD_DETACHED 0 +#define BKBD_TOP_HALF 1 +#define BKBD_BOTTOM_HALF 2 + +static const struct dmi_system_id yb9_kbdock_dmi_table[] = { + { + /* Lenovo Yoga Book 9 14IAH10 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "83KJ"), + }, + }, + { } +}; + +/* + * Shared state between the event and block WMI drivers. Protected by lock. + * The lock may be held across wmidev_query_block() calls (which can sleep); + * block_remove() acquires the lock before clearing block_wdev, ensuring + * block_wdev remains valid for the duration of any in-progress query. + */ +static struct { + struct mutex lock; /* protects input_dev and block_wdev */ + struct input_dev *input_dev; /* set by event probe */ + struct wmi_device *block_wdev; /* set by block probe */ +} yb9 = { + .lock = __MUTEX_INITIALIZER(yb9.lock), +}; + +/** + * yb9_kbdock_query_locked() - Read BKBD from the block device. + * @log_dev: Device for logging. + * + * Context: Caller must hold yb9.lock. + * Returns: 0-3 on success, -errno on failure. + */ +static int yb9_kbdock_query_locked(struct device *log_dev) +{ + struct wmi_buffer out = {}; + u32 bkbd; + int ret; + + if (!yb9.block_wdev) + return -ENODEV; + + ret = wmidev_query_block(yb9.block_wdev, 0, &out, 8); + if (ret) { + dev_warn(log_dev, "WQAF failed: %d\n", ret); + return ret; + } + + u8 *data __free(kfree) = out.data; + + /* + * LENOVO_FEATURE_STATUS_DATA: 8-byte buffer {IDs=0x00060000, Status=BKBD}. + * BKBD is at bytes 4-7. + */ + memcpy(&bkbd, data + 4, sizeof(bkbd)); + return FIELD_GET(BKBD_FIELD, bkbd); +} + +/* Report SW_TABLET_MODE from BKBD. Caller must hold yb9.lock. */ +static void yb9_kbdock_report_locked(int bkbd, struct device *log_dev) +{ + int tablet = (bkbd == BKBD_DETACHED) ? 1 : 0; + + input_report_switch(yb9.input_dev, SW_TABLET_MODE, tablet); + input_sync(yb9.input_dev); + dev_dbg(log_dev, "BKBD=%d SW_TABLET_MODE=%d\n", bkbd, tablet); +} + +/* Read BKBD and report if both WMI devices are ready. Caller must hold yb9.lock. */ +static void yb9_kbdock_sync_locked(struct device *log_dev) +{ + int bkbd; + + if (!yb9.input_dev || !yb9.block_wdev) + return; + + bkbd = yb9_kbdock_query_locked(log_dev); + if (bkbd >= 0) + yb9_kbdock_report_locked(bkbd, log_dev); +} + +/* ------------------------------------------------------------------ + * sysfs + * ------------------------------------------------------------------ */ + +static ssize_t keyboard_position_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int bkbd; + + guard(mutex)(&yb9.lock); + bkbd = yb9_kbdock_query_locked(dev); + if (bkbd < 0) + return bkbd; + return sysfs_emit(buf, "%d\n", bkbd); +} +static DEVICE_ATTR_RO(keyboard_position); + +static struct attribute *yb9_kbdock_attrs[] = { + &dev_attr_keyboard_position.attr, + NULL, +}; +ATTRIBUTE_GROUPS(yb9_kbdock); + +/* ------------------------------------------------------------------ + * Event WMI driver — LENOVO_BTKBD_EVENT + * ------------------------------------------------------------------ */ + +static void yb9_kbdock_notify(struct wmi_device *wdev, union acpi_object *data) +{ + u32 bkbd; + + /* + * _WED(0xEB) returns EC.BKBD directly as an integer + * (LENOVO_BTKBD_EVENT WmiDataId(1) uint32 Status). + */ + if (!data || data->type != ACPI_TYPE_INTEGER) { + dev_warn(&wdev->dev, "unexpected event data type %d\n", + data ? data->type : -1); + return; + } + bkbd = FIELD_GET(BKBD_FIELD, data->integer.value); + + guard(mutex)(&yb9.lock); + if (yb9.input_dev) + yb9_kbdock_report_locked(bkbd, &wdev->dev); +} + +static int yb9_kbdock_event_probe(struct wmi_device *wdev, const void *ctx) +{ + struct input_dev *input_dev; + int err; + + if (!dmi_check_system(yb9_kbdock_dmi_table)) + return -ENODEV; + + input_dev = devm_input_allocate_device(&wdev->dev); + if (!input_dev) + return -ENOMEM; + + input_dev->name = "Lenovo Yoga Book 9 keyboard dock switch"; + input_dev->phys = YB9_KBDOCK_EVENT_GUID "/input0"; + input_dev->id.bustype = BUS_HOST; + input_set_capability(input_dev, EV_SW, SW_TABLET_MODE); + + err = input_register_device(input_dev); + if (err) + return err; + + guard(mutex)(&yb9.lock); + yb9.input_dev = input_dev; + yb9_kbdock_sync_locked(&wdev->dev); + return 0; +} + +static void yb9_kbdock_event_remove(struct wmi_device *wdev) +{ + guard(mutex)(&yb9.lock); + yb9.input_dev = NULL; +} + +static int yb9_kbdock_resume(struct device *dev) +{ + guard(mutex)(&yb9.lock); + yb9_kbdock_sync_locked(dev); + return 0; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(yb9_kbdock_pm_ops, NULL, yb9_kbdock_resume); + +static const struct wmi_device_id yb9_kbdock_event_id_table[] = { + { .guid_string = YB9_KBDOCK_EVENT_GUID }, + { } +}; +MODULE_DEVICE_TABLE(wmi, yb9_kbdock_event_id_table); + +static struct wmi_driver yb9_kbdock_event_driver = { + .driver = { + .name = "lenovo-yb9-kbdock", + .dev_groups = yb9_kbdock_groups, + .pm = pm_sleep_ptr(&yb9_kbdock_pm_ops), + }, + .id_table = yb9_kbdock_event_id_table, + .no_singleton = true, + .probe = yb9_kbdock_event_probe, + .remove = yb9_kbdock_event_remove, + .notify = yb9_kbdock_notify, +}; + +/* ------------------------------------------------------------------ + * Block WMI driver — LENOVO_FEATURE_STATUS_DATA + * ------------------------------------------------------------------ */ + +static int yb9_kbdock_block_probe(struct wmi_device *wdev, const void *ctx) +{ + if (!dmi_check_system(yb9_kbdock_dmi_table)) + return -ENODEV; + + guard(mutex)(&yb9.lock); + yb9.block_wdev = wdev; + yb9_kbdock_sync_locked(&wdev->dev); + return 0; +} + +static void yb9_kbdock_block_remove(struct wmi_device *wdev) +{ + guard(mutex)(&yb9.lock); + yb9.block_wdev = NULL; +} + +static const struct wmi_device_id yb9_kbdock_block_id_table[] = { + { .guid_string = YB9_KBDOCK_QUERY_GUID }, + { } +}; + +static struct wmi_driver yb9_kbdock_block_driver = { + .driver = { + .name = "lenovo-yb9-kbdock-block", + }, + .id_table = yb9_kbdock_block_id_table, + .no_singleton = true, + .probe = yb9_kbdock_block_probe, + .remove = yb9_kbdock_block_remove, +}; + +/* ------------------------------------------------------------------ + * Module init / exit + * ------------------------------------------------------------------ */ + +static int __init yb9_kbdock_init(void) +{ + int ret; + + ret = wmi_driver_register(&yb9_kbdock_event_driver); + if (ret) + return ret; + + ret = wmi_driver_register(&yb9_kbdock_block_driver); + if (ret) { + wmi_driver_unregister(&yb9_kbdock_event_driver); + return ret; + } + return 0; +} +module_init(yb9_kbdock_init); + +static void __exit yb9_kbdock_exit(void) +{ + wmi_driver_unregister(&yb9_kbdock_block_driver); + wmi_driver_unregister(&yb9_kbdock_event_driver); +} +module_exit(yb9_kbdock_exit); + +MODULE_AUTHOR("Dave Carey "); +MODULE_DESCRIPTION("Lenovo Yoga Book 9 keyboard dock detection"); +MODULE_LICENSE("GPL"); -- 2.54.0