From nobody Sun Feb 8 05:46:01 2026 Received: from mail-pg1-f179.google.com (mail-pg1-f179.google.com [209.85.215.179]) (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 D4BED54640; Thu, 22 May 2025 01:53:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747878839; cv=none; b=pXsd985KOCb2uhafzTki+Lkq8tRLbOLGT01QX5fiTdDkOLovxNPB6NThvlOF+IIvtyX088aDPgZTe7pp6Hjv+MoSLNlcjDwJddyD2kzL/km3oSfPq90lAID/842uHBChxf06RN78bFcwI0q/TU7MZP80u6+u6WU7yL+EvbCR3Vc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747878839; c=relaxed/simple; bh=LJOMEG1cRga7I33whsr4Tf9Qe27uZ/xJ3bIWGYZLZmU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=n0+T/8G13q4tFSk0dqtoYaB9NC2GnjGdI+y8lDmLsQNQyA4LzTl37oIkPw6I3cOilOfDtaEnEHp64ift10b5XNkVG8t7HQjCcWt2epmk3CqTq04+XLsls5jKLAdeopvFWuoFgcipdIzlwYJkmw0AOaXOI8zL4jda+eNA2TJ4j6I= 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=lU5p6fdE; arc=none smtp.client-ip=209.85.215.179 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="lU5p6fdE" Received: by mail-pg1-f179.google.com with SMTP id 41be03b00d2f7-af59c920d32so4664176a12.0; Wed, 21 May 2025 18:53:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1747878837; x=1748483637; 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=ezv9dCwmSiidD9fm43/jQatMP09jNR75GvJXzpZvLg0=; b=lU5p6fdEJzgrSYMSPNI2pjrUK9jS2a5a7pDZhypQ0FeEkLJMwteHvmZOa4hNXiYCtT lHpni2W1o0pCeXf1m9THVJvHqpWGpn5G4zIT/oZA+Zo8L7cqzf8aawtFP64khw/mR7O1 nv21NNubZvM51rfGfy4ZI46Gsa/vUHdKVKUEIZ8Qor7P5bPMKAUfxh2t/l8qpdhiWTGE BY1OpuhqyOGaILid4Fr+lveQBCAhkA63o5CJEYeUt2KnoG1IbaEfm2yqPk7NTpJ23mv0 H5dKU8wt6iqHB9E8SorY+tl2jEnu4Nb0xnBQhoEu/70RCPWloeFLQmZ0IOmg/t2UT0kE ng0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747878837; x=1748483637; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ezv9dCwmSiidD9fm43/jQatMP09jNR75GvJXzpZvLg0=; b=sebl7puNnurlI3NxnfD/TtI2jOFNOMxRr/dAE4ODyHCFts0sVfUWs/Ji7BShTcO9lL e7FyGaVVc4E8F1Pz7mkPEHnHdEK+aX5w0nR/JTyY6TT09O1MV+Cb44IXCA7brzG/QEva WVHTbyfn+5E3MuVsMQvnSzdA/dlD02nrWDHKVOZXXqwflBOPrm8ZJPdYP2VYAhkOAEuH 4jbFsCOM3bOu3dM+LAPReHSFcIUtT2MUTz8Mt8hmcgknbht5cGK4KPNpEngJG09pBl7A mYWYjrmfI0/TwLkzmUZHWK/5dpj8L4VLMhCzkfmqQs5R6P6g/vWwQJaHpoC6f1fo63sp EOCg== X-Forwarded-Encrypted: i=1; AJvYcCUkTxFMs6YPvLkz/S7fb3RhASr6ISaleW2XrL9m55bTSSokTp5f6dtHCI/x9+eisQSE2wDuF1LClohxJmkzjpW2HPGiBw==@vger.kernel.org, AJvYcCVzlsfdq5xGstANos9s0L7rzfZBH9lLyrwkuyMrFvXEQUS6MayrE90B7gST40Jal6uK1UIm1cSJnY4=@vger.kernel.org, AJvYcCWhkKslEiOSuG3lSFwUhRF3f5SOsa3ey54h+H5wYLj2LLKTg1axmWgMgUHoWwpDEglqNLGO9GYpMFVb6IsW@vger.kernel.org X-Gm-Message-State: AOJu0YwOOhWWtgiC56b/n+xliQHzMT/ceWPpSbQGTaxp2sb7NBwpvqvw LFCLY/ewPAtl97qE7PKXoiD3bWRazxspN4QGo356RDRQJ7utTmLnKGN2cbLnWHrLbHE= X-Gm-Gg: ASbGncsrZtPVfLImgj+vX9fdam6/1tdF2aZKOtWlSc9WfGmLnemKZvRbcJRYvHNI+Dp avSZcfYgK9oPLB1kpJIx1INkfLl8UiKF/hxi2ZASOT6ZSMqJSp/wqErda4OBL6+DMs3qOnZvJ9E Bx9RcT6bTJU6nAq3lGn/VQz1y/XUE2Bm8u0aHlEIIOidG2F32SQDG6+f4QNEg+S0hjZVqIfQlDq EU50GthvMmt2e9GrVMd61568lQgrOE8jnRUXle2FVb1ZLA1HcgjSMkM5vSsKgmAn8NXJVsb+WVY eWSAR+PvJGQyrVrLSHA1x91fbvnP3aSia20wFBC9Lt2ig65rRVHcakG3oBA/vyYMfofS1vcfCwH YLHq5nrUWoRdHL/3CjcWJMk3WxsVrQ5kF38M8YWjOMU8BbduYmQ== X-Google-Smtp-Source: AGHT+IFyQ7diFU5uPnSmMQGvxpDCjF7DuN2RlbXvoVTVsVZENVTyPQaBmituhCG7F48Vvy4Nb4UJGw== X-Received: by 2002:a17:903:11c3:b0:223:47b4:aaf8 with SMTP id d9443c01a7336-231d45eeeb0mr285083535ad.52.1747878836927; Wed, 21 May 2025 18:53:56 -0700 (PDT) Received: from localhost.localdomain (108-228-232-20.lightspeed.sndgca.sbcglobal.net. [108.228.232.20]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-231d4e97347sm98878225ad.116.2025.05.21.18.53.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 May 2025 18:53:56 -0700 (PDT) From: "Derek J. Clark" To: Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Cc: Armin Wolf , Jonathan Corbet , Mario Limonciello , Luke Jones , Xino Ni , Zhixin Zhang , Mia Shao , Mark Pearson , "Pierre-Loup A . Griffais" , "Cody T . -H . Chiu" , John Martens , Kurt Borja , "Derek J . Clark" , platform-driver-x86@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Alok Tiwari , Mario Limonciello Subject: [PATCH v11 2/6] platform/x86: Add lenovo-wmi-helpers Date: Wed, 21 May 2025 18:53:46 -0700 Message-ID: <20250522015350.471070-3-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250522015350.471070-1-derekjohn.clark@gmail.com> References: <20250522015350.471070-1-derekjohn.clark@gmail.com> 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" Adds lenovo-wmi-helpers, which provides a common wrapper function for wmidev_evaluate_method that does data validation and error handling. Reviewed-by: Alok Tiwari Reviewed-by: Armin Wolf Reviewed-by: Mario Limonciello Signed-off-by: Derek J. Clark --- v11: - Formatting v10: No change v9: Fix missing newline before return in lwmi_dev_evaluate_int v8: No change v7: - Fix typos v6: - Fix typos and rewordings from v5 review. v5: - Fixes from v4 review. - Combine all previous methods into a single function that takes a buffer for the wmi method arguments. v4: - Changed namespace to LENOVO_WMI_HELPERS from LENOVO_WMI. - Changed filenames to lenovo-wmi-helpers from lenovo-wmi. - Removed structs and functions implemented by other drivers. --- MAINTAINERS | 1 + drivers/platform/x86/Kconfig | 4 ++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/lenovo-wmi-helpers.c | 74 +++++++++++++++++++++++ drivers/platform/x86/lenovo-wmi-helpers.h | 20 ++++++ 5 files changed, 100 insertions(+) create mode 100644 drivers/platform/x86/lenovo-wmi-helpers.c create mode 100644 drivers/platform/x86/lenovo-wmi-helpers.h diff --git a/MAINTAINERS b/MAINTAINERS index 675f4b26426d..aab59a777693 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13164,6 +13164,7 @@ L: platform-driver-x86@vger.kernel.org S: Maintained F: Documentation/wmi/devices/lenovo-wmi-gamezone.rst F: Documentation/wmi/devices/lenovo-wmi-other.rst +F: drivers/platform/x86/lenovo-wmi-helpers.* =20 LENOVO WMI HOTKEY UTILITIES DRIVER M: Jackie Dong diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 43407e76476b..bece1ba61417 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -459,6 +459,10 @@ config IBM_RTL state =3D 0 (BIOS SMIs on) state =3D 1 (BIOS SMIs off) =20 +config LENOVO_WMI_HELPERS + tristate + depends on ACPI_WMI + config IDEAPAD_LAPTOP tristate "Lenovo IdeaPad Laptop Extras" depends on ACPI diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 650dfbebb6c8..5a9f4e94f78b 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -69,6 +69,7 @@ obj-$(CONFIG_THINKPAD_LMI) +=3D think-lmi.o obj-$(CONFIG_YOGABOOK) +=3D lenovo-yogabook.o obj-$(CONFIG_YT2_1380) +=3D lenovo-yoga-tab2-pro-1380-fastcharger.o obj-$(CONFIG_LENOVO_WMI_CAMERA) +=3D lenovo-wmi-camera.o +obj-$(CONFIG_LENOVO_WMI_HELPERS) +=3D lenovo-wmi-helpers.o =20 # Intel obj-y +=3D intel/ diff --git a/drivers/platform/x86/lenovo-wmi-helpers.c b/drivers/platform/x= 86/lenovo-wmi-helpers.c new file mode 100644 index 000000000000..4a194aad1ed0 --- /dev/null +++ b/drivers/platform/x86/lenovo-wmi-helpers.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Lenovo Legion WMI helpers driver. + * + * The Lenovo Legion WMI interface is broken up into multiple GUID interfa= ces + * that require cross-references between GUID's for some functionality. The + * "Custom Mode" interface is a legacy interface for managing and displayi= ng + * CPU & GPU power and hwmon settings and readings. The "Other Mode" inter= face + * is a modern interface that replaces or extends the "Custom Mode" interf= ace + * methods. The "Gamezone" interface adds advanced features such as fan + * profiles and overclocking. The "Lighting" interface adds control of var= ious + * status lights related to different hardware components. Each of these + * drivers uses a common procedure to get data from the WMI interface, + * enumerated here. + * + * Copyright (C) 2025 Derek J. Clark + */ + +#include +#include +#include +#include +#include +#include + +#include "lenovo-wmi-helpers.h" + +/** + * lwmi_dev_evaluate_int() - Helper function for calling WMI methods that + * return an integer. + * @wdev: Pointer to the WMI device to be called. + * @instance: Instance of the called method. + * @method_id: WMI Method ID for the method to be called. + * @buf: Buffer of all arguments for the given method_id. + * @size: Length of the buffer. + * @retval: Pointer for the return value to be assigned. + * + * Calls wmidev_evaluate_method for Lenovo WMI devices that return an ACPI + * integer. Validates the return value type and assigns the value to the + * retval pointer. + * + * Return: 0 on success, or an error code. + */ +int lwmi_dev_evaluate_int(struct wmi_device *wdev, u8 instance, u32 method= _id, + unsigned char *buf, size_t size, u32 *retval) +{ + struct acpi_buffer output =3D { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *ret_obj __free(kfree) =3D NULL; + struct acpi_buffer input =3D { size, buf }; + acpi_status status; + + status =3D wmidev_evaluate_method(wdev, instance, method_id, &input, + &output); + if (ACPI_FAILURE(status)) + return -EIO; + + if (retval) { + ret_obj =3D output.pointer; + if (!ret_obj) + return -ENODATA; + + if (ret_obj->type !=3D ACPI_TYPE_INTEGER) + return -ENXIO; + + *retval =3D (u32)ret_obj->integer.value; + } + + return 0; +}; +EXPORT_SYMBOL_NS_GPL(lwmi_dev_evaluate_int, "LENOVO_WMI_HELPERS"); + +MODULE_AUTHOR("Derek J. Clark "); +MODULE_DESCRIPTION("Lenovo WMI Helpers Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/platform/x86/lenovo-wmi-helpers.h b/drivers/platform/x= 86/lenovo-wmi-helpers.h new file mode 100644 index 000000000000..20fd21749803 --- /dev/null +++ b/drivers/platform/x86/lenovo-wmi-helpers.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +/* Copyright (C) 2025 Derek J. Clark */ + +#ifndef _LENOVO_WMI_HELPERS_H_ +#define _LENOVO_WMI_HELPERS_H_ + +#include + +struct wmi_device; + +struct wmi_method_args_32 { + u32 arg0; + u32 arg1; +}; + +int lwmi_dev_evaluate_int(struct wmi_device *wdev, u8 instance, u32 method= _id, + unsigned char *buf, size_t size, u32 *retval); + +#endif /* !_LENOVO_WMI_HELPERS_H_ */ --=20 2.49.0