From patchwork Sat Nov 9 04:41:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 13869232 Received: from NAM12-BN8-obe.outbound.protection.outlook.com (mail-bn8nam12on2049.outbound.protection.outlook.com [40.107.237.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7FDCC197A6A; Sat, 9 Nov 2024 04:43:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.237.49 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731127387; cv=fail; b=JOb74QiJ8Kh4ICGRm+PNdrZFCaBkCktJ7xq0LGA08bE9vqbf2Mmuj3WKr5upRQ1XVeOSm71ifKzobiyCqdG17UMLVicOuEL95lZJg+h1FA20TR8wwJSQZTPeW6+Hfg04T6eM7SUNg9r/F5McvnYdvx5VwgJNcHZyMAzo9OL9OII= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731127387; c=relaxed/simple; bh=/+/ROlHIruuC8Ptk3wbPDnl/Q1PdBpPyHTOE4QQFJzE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=g9/gfv84kkmQGeRrAN0UYbMrpB/U+23gMI2M3ZWRVxrPmkv9M5w+rJIB/E20T6roPbthd4u2HaXYdudeJ2u34vm4wmnxRlKg9wroTbmRY9ognMQbARrCOLuh6Z9ZFPn2l9ZJEoHqpFqRcK4vD0GJuig3ZBgLwQI7qc1XVOwHDlw= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=VSjSz/pW; arc=fail smtp.client-ip=40.107.237.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="VSjSz/pW" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ellgB+9wHNiTkVpQi3zS129lXjeeNGUkZIsEhWZsQNT+TIfW4PU+jGoCpGuV4nb4/dVe1o0BDGTCBwgDl/oBoHWOMU+5wqwKPy913O2ZaHdz5Qc/4WsI4UVfEAexpEiNJEmzfDp74L9VMlnf2HCH1E2YyImRcX5bKH/1+gsEIv+r7b07n1QyDQoM4bBkIyfRyHgM/ULZbHmxnhYBBBRTtTJmciyQ78FeeWHZWaYpH7X2GBrmz4zyVw2rwKn4cVFUNMveE0mCeprVJC3irDw6Qr3ra/cLk9368bV4g0fBtJAT00F2MvyakpwuvDwyWuZUxJRNKazby5Ov7BC0PgVqgQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=xMYzj0HO6grQuskdeKK/x04e7ys9n7Ov1LkG/6DM3OQ=; b=MoWgFH3bh/Uwyq9wV72bOt8bg3QwN+n0hwBFz4Qr2FKAX6+PlIQ1t1KnGTW3Cdl2A9Xuat2tBBDzx2e4IPogaDqT1wh6+mt6ZYf9sS+TwMFnO32sfqxY1lKwOrkUmVbU0sZzuz1eRDQlsNcbM9QLbWsWiCRADktKdAj5xwQvWjTCRQOgBTgvbmPGmQY3BXjoeKDSIxHkKk/+qDe4rujzMCZJcOeJT2atXDq5YINu4xzecEvW8bmoSrSbmgpRy5hxJlrfiEZ1ttSobPApYDhqjCVIdzKehv4QgdhwJiaDjYyYvTUUxyM6I8tvudA3Qko2PO3k16s4Beerx2rZ0TX1KQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=redhat.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xMYzj0HO6grQuskdeKK/x04e7ys9n7Ov1LkG/6DM3OQ=; b=VSjSz/pWlJaZgaeuOM77sZeEC1qhWc/FZ8lexx6kbr0ApiY0JCr3rIA9ukawe7Xkh6Ifc/BnSTX4PfCOvfdw2ulg4MmyXRSATgc1uDL4hor6ep/QlDzuksOu4OJOM8XQc3NfLF3VT5OyyRrh8ns6ipeoLaoLtS6uNIWaMWRYUME= Received: from SN4PR0501CA0046.namprd05.prod.outlook.com (2603:10b6:803:41::23) by IA0PR12MB8974.namprd12.prod.outlook.com (2603:10b6:208:488::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8137.18; Sat, 9 Nov 2024 04:43:01 +0000 Received: from SN1PEPF00026369.namprd02.prod.outlook.com (2603:10b6:803:41:cafe::cf) by SN4PR0501CA0046.outlook.office365.com (2603:10b6:803:41::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8158.11 via Frontend Transport; Sat, 9 Nov 2024 04:43:01 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SN1PEPF00026369.mail.protection.outlook.com (10.167.241.134) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8137.17 via Frontend Transport; Sat, 9 Nov 2024 04:43:01 +0000 Received: from AUS-P9-MLIMONCI.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Fri, 8 Nov 2024 22:42:59 -0600 From: Mario Limonciello To: Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= CC: "Rafael J . Wysocki" , Len Brown , Maximilian Luz , Lee Chun-Yi , "Shyam Sundar S K" , Corentin Chary , "Luke D . Jones" , Ike Panhc , Henrique de Moraes Holschuh , "Alexis Belmonte" , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Ai Chao , Gergo Koteles , open list , "open list:ACPI" , "open list:MICROSOFT SURFACE PLATFORM PROFILE DRIVER" , "open list:THINKPAD ACPI EXTRAS DRIVER" , Mark Pearson , Matthew Schwartz , Mario Limonciello Subject: [PATCH v6 22/22] Documentation: Add documentation about class interface for platform profiles Date: Fri, 8 Nov 2024 22:41:51 -0600 Message-ID: <20241109044151.29804-23-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241109044151.29804-1-mario.limonciello@amd.com> References: <20241109044151.29804-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF00026369:EE_|IA0PR12MB8974:EE_ X-MS-Office365-Filtering-Correlation-Id: a2a6b79b-46fd-4b88-55ce-08dd0078fddb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|7416014|376014|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700013)(7416014)(376014)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Nov 2024 04:43:01.0782 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a2a6b79b-46fd-4b88-55ce-08dd0078fddb X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF00026369.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8974 The class interface allows changing multiple platform profiles on a system to different values. The semantics of it are similar to the legacy interface. Tested-by: Mark Pearson Signed-off-by: Mario Limonciello Reviewed-by: Armin Wolf --- v5: * Fix some typos --- .../ABI/testing/sysfs-platform_profile | 5 ++++ .../userspace-api/sysfs-platform_profile.rst | 28 +++++++++++++++++++ 2 files changed, 33 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-platform_profile b/Documentation/ABI/testing/sysfs-platform_profile index baf1d125f9f83..125324ab53a96 100644 --- a/Documentation/ABI/testing/sysfs-platform_profile +++ b/Documentation/ABI/testing/sysfs-platform_profile @@ -33,3 +33,8 @@ Description: Reading this file gives the current selected profile for this source such as e.g. a hotkey triggered profile change handled either directly by the embedded-controller or fully handled inside the kernel. + + This file may also emit the string 'custom' to indicate + that multiple platform profiles drivers are in use but + have different values. This string can not be written to + this interface and is solely for informational purposes. diff --git a/Documentation/userspace-api/sysfs-platform_profile.rst b/Documentation/userspace-api/sysfs-platform_profile.rst index 4fccde2e45639..b746c30432753 100644 --- a/Documentation/userspace-api/sysfs-platform_profile.rst +++ b/Documentation/userspace-api/sysfs-platform_profile.rst @@ -40,3 +40,31 @@ added. Drivers which wish to introduce new profile names must: 1. Explain why the existing profile names cannot be used. 2. Add the new profile name, along with a clear description of the expected behaviour, to the sysfs-platform_profile ABI documentation. + +Multiple driver support +======================= +When multiple drivers on a system advertise a platform profile handler, the +platform profile handler core will only advertise the profiles that are +common between all drivers to the ``/sys/firmware/acpi`` interfaces. + +This is to ensure there is no ambiguity on what the profile names mean when +all handlers don't support a profile. + +Individual drivers will register a 'platform_profile' class device that has +similar semantics as the ``/sys/firmware/acpi/platform_profile`` interface. + +To discover available profiles from the class interface the user can read the +``choices`` attribute. + +If a user wants to select a profile for a specific driver, they can do so +by writing to the ``profile`` attribute of the driver's class device. + +This will allow users to set different profiles for different drivers on the +same system. If the selected profile by individual drivers differs the +platform profile handler core will display the profile 'custom' to indicate +that the profiles are not the same. + +While the ``platform_profile`` attribute has the value ``custom``, writing a +common profile from ``platform_profile_choices`` to the platform_profile +attribute of the platform profile handler core will set the profile for all +drivers.