From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dl1-f49.google.com (mail-dl1-f49.google.com [74.125.82.49]) (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 ACAEF47DF8E for ; Thu, 7 May 2026 18:05:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778177136; cv=none; b=WgNc0Lkb0/ZJSEGKk8XMapxmQ+V0MphTzbXdDYAJEdRuYSWcdhiXGzlmOlNtvd7Xgr6eJbzQ/tt4nqQp9TobfrDlFyxDjGuxpH2LwpB8iyFYZDoxfmJwPos6Ey5KpngRwnEmO5O4kWX0lvL3DGXf8MIY/pox2Lz+RKYUolmeGko= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778177136; c=relaxed/simple; bh=ZmXhWCRPkzi5nSZOzkOVzZtTzDx5rrOdANioh4FSUb8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RSM7wGKm9NXCluZ1ESZsYAfwfZIR67//ehGvySXIelaP9FjuT+5xsB+ZZgnqr6tr1ZS5p/Sg5zNxAG7p5VSwBN+IAkEPRDhfcwMfPr7rCm2zTSySUc1sUElhQ3s9jDIN1wn+1Y9extuQmDLCi3aAg9eng6kTQGYvZ0/thaoeidU= 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=AX9ujgwM; arc=none smtp.client-ip=74.125.82.49 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="AX9ujgwM" Received: by mail-dl1-f49.google.com with SMTP id a92af1059eb24-12dca45ca21so1829664c88.1 for ; Thu, 07 May 2026 11:05:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1778177134; x=1778781934; 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=myMYYqTqp1LBWmWIy6uL5gTbQy4ZdtNkIDqtI6ndFyI=; b=AX9ujgwMoLvySFtxSy69DefQa9dAd+V4QkuqliNFalV5J8fXA+oxp5SCby4tMoKs5u 5HfME1PJEYqmdHP0oyo8AsIEr2rZrvwXKx+sQEIVhHhK4iVS8+FrKCR64j76aXL6dQuI hsx/cgRHqzBVhvYNJDanYNX6ddhgZcM56w/iwRkJgAj062bgKjczvVksPz1VpgR30Lhg JhsZif6YxfLqmTASHpZJy4LxcvMPHVkCLhwQUEFjUcHVxBHUoVpZQtuUi6s3IV83wFJw cdcj/GQ2DIB4GUWUGhelXjroRSjIizk0MFCe+yXA74fY8djYEkEZWN30ZWcWWLW9DHC3 9X6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778177134; x=1778781934; 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=myMYYqTqp1LBWmWIy6uL5gTbQy4ZdtNkIDqtI6ndFyI=; b=ocD4mz29OAiirb6I5isvEq4W+AYPpdrng7fQtgFOEWU7zJidUmFP7OOX3K7+UFSReY n1yGpmKloNluCNFgB+NZyZEFWV9Ez9PSUfoIqCOzhY+Gz4ALNbySusExrGEUGXWUGttO M22Kqu6yiuytsYhQ7qIP6coc+uKXe+KnLsCHf2gND5aEjMzE/SplZM2En5D+/HBa36us 0gvKPM8WUczhfrEhar/IfBFD7K1QFyXtzZRDsYJSLeFD6E6iR9shtxa+HWZU69PWpdgI pJdaFDQeK1jSKRURgykRb38UotkCl0MiyYGWwilH9wb2kTev1IwBbP9nKI1Uq2Xd+mV0 q4yA== X-Forwarded-Encrypted: i=1; AFNElJ+L1O8jnibxKUK3HAtEQmY4xJkRmk1j7lNfvXs05FNeUf1nRuyE965RVpLaW8ZU8YMCBdga5O1n48oa2BM=@vger.kernel.org X-Gm-Message-State: AOJu0YwFYAFP5+DjpZ+XqziKGYvhbSAiVmmLGgGA2Fg73z6qpmwmOr1F MGLqrSLAU81Xm9+si98B9OCri3wCf5/PbpF7dWAWVPLZXR1YnpYjHcfC X-Gm-Gg: AeBDietiQVZxyuZ2HLFTrRcu0l1Ya3i2gBcjFLMarl9W8oKRRpYGZFT+ypNfi5jGIXL iQ9hAimWJFgyOlXweq1KQBFdvZTlc0VP/MXXWnbftoGDebcnqqQAX2bApafNBhd2xJmK+ijKX1v zGnxSQkO+FCkS0V6A3lEb/oWDL11t45Ua6qNd2c29cimtEjRU75p/ZEVZRPTNbpluGn0PNLYH2A X7yH8dvb87hSLTKcWI+jJWbTP1vBK8/QIwrIxhQ2UeBC6ycJM+2uYqz9KpjEcKbSEUElmDNCcrS J9DrYIW8DXZNQD165uhSXlQokzq/6AENLY2AWlYIJJyM1Y+PPmX3sXKYI/Yte2+g49IMSCWgnDB yfsBzCsSWdybSdh01FoVrisMOhdpdPPZrZOiZtiNecijigfwt6CKTUj/O5blBO2uxa6vNVuuhrI fq8AZjwALyJAw1jgTA422PEXFVV0ORzo9ENpmWVur8trzS/XYdnZWUEW2OSdTd01C7KBGlI615a XJl X-Received: by 2002:a05:7301:fa0d:b0:2d9:2b54:ea9c with SMTP id 5a478bee46e88-2f549f7c312mr4856258eec.18.1778177133651; Thu, 07 May 2026 11:05:33 -0700 (PDT) Received: from lappy (108-228-232-20.lightspeed.sndgca.sbcglobal.net. [108.228.232.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2f82bd73a64sm44332eec.12.2026.05.07.11.05.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 May 2026 11:05:33 -0700 (PDT) From: "Derek J. Clark" To: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Hans de Goede Cc: Mark Pearson , Armin Wolf , Jonathan Corbet , Rong Zhang , Kurt Borja , "Derek J . Clark" , "Pierre-Loup A . Griffais" , =?UTF-8?q?N=C3=ADcolas=20F=20=2E=20R=20=2E=20A=20=2E=20Prado?= , marshall@shzj.cc, hyacinth@shzj.cc, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v11 15/15] platform/x86: lenovo-wmi-capdata: Add debugfs file for dumping capdata Date: Thu, 7 May 2026 18:05:07 +0000 Message-ID: <20260507180507.912966-16-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260507180507.912966-1-derekjohn.clark@gmail.com> References: <20260507180507.912966-1-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: 8bit From: Rong Zhang The Lenovo GameZone/Other interfaces have some delicate divergences among different devices. When making a bug report or adding support for new devices/interfaces, capdata is the most important information to cross-check with. Add a debugfs file (lenovo_wmi//capdata), so that users can dump capdata and include it in their reports. Since `struct capdata01' is just an extension to `struct capdata00', also converts the former to include the latter anonymously (-fms-extensions, since v6.19). In this manner type casting won't be confusing. Tested-by: Kurt Borja Signed-off-by: Rong Zhang Signed-off-by: Derek J. Clark --- drivers/platform/x86/lenovo/Kconfig | 1 + drivers/platform/x86/lenovo/wmi-capdata.c | 120 ++++++++++++++++++++++ drivers/platform/x86/lenovo/wmi-capdata.h | 4 +- 3 files changed, 122 insertions(+), 3 deletions(-) diff --git a/drivers/platform/x86/lenovo/Kconfig b/drivers/platform/x86/lenovo/Kconfig index b9a5d18caa1e..4443f40ef8aa 100644 --- a/drivers/platform/x86/lenovo/Kconfig +++ b/drivers/platform/x86/lenovo/Kconfig @@ -236,6 +236,7 @@ config YT2_1380 config LENOVO_WMI_CAPDATA tristate depends on ACPI_WMI + depends on LENOVO_WMI_HELPERS config LENOVO_WMI_EVENTS tristate diff --git a/drivers/platform/x86/lenovo/wmi-capdata.c b/drivers/platform/x86/lenovo/wmi-capdata.c index 169665be4dcf..b5e2c16d638f 100644 --- a/drivers/platform/x86/lenovo/wmi-capdata.c +++ b/drivers/platform/x86/lenovo/wmi-capdata.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -42,6 +43,7 @@ #include #include #include +#include #include #include #include @@ -88,6 +90,7 @@ struct lwmi_cd_priv { struct notifier_block acpi_nb; /* ACPI events */ struct wmi_device *wdev; struct cd_list *list; + struct dentry *debugfs_dir; /* * A capdata device may be a component master of another capdata device. @@ -118,6 +121,8 @@ struct cd_list { static struct wmi_driver lwmi_cd_driver; +/* ======== Device components ======== */ + /** * lwmi_cd_match() - Match rule for the master driver. * @dev: Pointer to the capability data parent device. @@ -471,6 +476,116 @@ EXPORT_SYMBOL_NS_GPL(lwmi_cd01_get_data, "LENOVO_WMI_CAPDATA"); DEF_LWMI_CDXX_GET_DATA(cd_fan, LENOVO_FAN_TEST_DATA, struct capdata_fan); EXPORT_SYMBOL_NS_GPL(lwmi_cd_fan_get_data, "LENOVO_WMI_CAPDATA"); +/* ======== debugfs ======== */ + +/** + * lwmi_cd00_show() - Dump capdata00 + * @s: Pointer to seq_file where the capdata00 is dumped. + * @cd00: Pointer to a capdata00 struct to be dumped. + */ +static void lwmi_cd00_show(struct seq_file *s, struct capdata00 *cd00) +{ + u8 dev = FIELD_GET(LWMI_ATTR_DEV_ID_MASK, cd00->id); + u8 feat = FIELD_GET(LWMI_ATTR_FEAT_ID_MASK, cd00->id); + u8 mode = FIELD_GET(LWMI_ATTR_MODE_ID_MASK, cd00->id); + u8 type = FIELD_GET(LWMI_ATTR_TYPE_ID_MASK, cd00->id); + bool extra = cd00->supported & ~(LWMI_SUPP_GET | LWMI_SUPP_SET | LWMI_SUPP_VALID); + bool get = cd00->supported & LWMI_SUPP_GET; + bool set = cd00->supported & LWMI_SUPP_SET; + bool valid = cd00->supported & LWMI_SUPP_VALID; + + seq_printf(s, " id: 0x%08x [dev: %2u, feat: %2u, mode: %2u, type: %2u]\n", + cd00->id, dev, feat, mode, type); + + seq_printf(s, " supported: 0x%08x [%c%c%c%c]\n", cd00->supported, + extra ? '+' : ' ', + get ? 'R' : ' ', + set ? 'W' : ' ', + valid ? 'V' : ' '); + + seq_printf(s, " default_value: %u\n", cd00->default_value); +} + +/** + * lwmi_cd01_show() - Dump capdata01 + * @s: Pointer to seq_file where the capdata01 is dumped. + * @cd01: Pointer to a capdata01 struct to be dumped. + */ +static void lwmi_cd01_show(struct seq_file *s, struct capdata01 *cd01) +{ + /* capdata01 is an extension to capdata00. */ + lwmi_cd00_show(s, (struct capdata00 *)cd01); + + seq_printf(s, " step: %u\n", cd01->step); + seq_printf(s, " min_value: %u\n", cd01->min_value); + seq_printf(s, " max_value: %u\n", cd01->max_value); +} + +/** + * lwmi_cd_fan_show() - Dump capdata_fan + * @s: Pointer to seq_file where the capdata_fan is dumped. + * @cd_fan: Pointer to a capdata_fan struct to be dumped. + */ +static void lwmi_cd_fan_show(struct seq_file *s, struct capdata_fan *cd_fan) +{ + seq_printf(s, " id: %u\n", cd_fan->id); + seq_printf(s, " min_rpm: %u\n", cd_fan->min_rpm); + seq_printf(s, " max_rpm: %u\n", cd_fan->max_rpm); +} + +/** + * lwmi_cd_debugfs_show() - Dump capability data to debugfs + * @s: Pointer to seq_file where the capability data is dumped. + * @data: unused. + * + * Return: 0 + */ +static int lwmi_cd_debugfs_show(struct seq_file *s, void *data) +{ + struct lwmi_cd_priv *priv = s->private; + u8 idx; + + guard(mutex)(&priv->list->list_mutex); + + /* lwmi_cd_alloc() ensured priv->list->type must be a valid type. */ + for (idx = 0; idx < priv->list->count; idx++) { + seq_printf(s, "%s[%u]:\n", lwmi_cd_table[priv->list->type].name, idx); + + if (priv->list->type == LENOVO_CAPABILITY_DATA_00) + lwmi_cd00_show(s, &priv->list->cd00[idx]); + else if (priv->list->type == LENOVO_CAPABILITY_DATA_01) + lwmi_cd01_show(s, &priv->list->cd01[idx]); + else if (priv->list->type == LENOVO_FAN_TEST_DATA) + lwmi_cd_fan_show(s, &priv->list->cd_fan[idx]); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(lwmi_cd_debugfs); + +/** + * lwmi_cd_debugfs_add() - Create debugfs directory and files for a device + * @priv: lenovo-wmi-capdata driver data. + */ +static void lwmi_cd_debugfs_add(struct lwmi_cd_priv *priv) +{ + priv->debugfs_dir = lwmi_debugfs_create_dir(priv->wdev); + + debugfs_create_file("capdata", 0444, priv->debugfs_dir, priv, &lwmi_cd_debugfs_fops); +} + +/** + * lwmi_cd_debugfs_remove() - Remove debugfs directory for a device + * @priv: lenovo-wmi-capdata driver data. + */ +static void lwmi_cd_debugfs_remove(struct lwmi_cd_priv *priv) +{ + debugfs_remove_recursive(priv->debugfs_dir); + priv->debugfs_dir = NULL; +} + +/* ======== WMI interface ======== */ + /** * lwmi_cd_cache() - Cache all WMI data block information * @priv: lenovo-wmi-capdata driver data. @@ -773,6 +888,8 @@ static int lwmi_cd_probe(struct wmi_device *wdev, const void *context) dev_err(&wdev->dev, "failed to register %s: %d\n", info->name, ret); } else { + lwmi_cd_debugfs_add(priv); + dev_dbg(&wdev->dev, "registered %s with %u items\n", info->name, priv->list->count); } @@ -783,6 +900,8 @@ static void lwmi_cd_remove(struct wmi_device *wdev) { struct lwmi_cd_priv *priv = dev_get_drvdata(&wdev->dev); + lwmi_cd_debugfs_remove(priv); + switch (priv->list->type) { case LENOVO_CAPABILITY_DATA_00: lwmi_cd_sub_master_del(priv); @@ -822,6 +941,7 @@ static struct wmi_driver lwmi_cd_driver = { module_wmi_driver(lwmi_cd_driver); +MODULE_IMPORT_NS("LENOVO_WMI_HELPERS"); MODULE_DEVICE_TABLE(wmi, lwmi_cd_id_table); MODULE_AUTHOR("Derek J. Clark "); MODULE_AUTHOR("Rong Zhang "); diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h index e0a30f2c0c87..0df3ae534ed5 100644 --- a/drivers/platform/x86/lenovo/wmi-capdata.h +++ b/drivers/platform/x86/lenovo/wmi-capdata.h @@ -38,9 +38,7 @@ struct capdata00 { }; struct capdata01 { - u32 id; - u32 supported; - u32 default_value; + struct capdata00; u32 step; u32 min_value; u32 max_value; -- 2.53.0