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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SJ1PEPF000023CF.mail.protection.outlook.com (10.167.244.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8230.7 via Frontend Transport; Fri, 6 Dec 2024 03:27:39 +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; Thu, 5 Dec 2024 21:26:28 -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 , Armin Wolf Subject: [PATCH v10 22/22] Documentation: Add documentation about class interface for platform profiles Date: Thu, 5 Dec 2024 21:19:18 -0600 Message-ID: <20241206031918.1537-23-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241206031918.1537-1-mario.limonciello@amd.com> References: <20241206031918.1537-1-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: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000023CF:EE_|IA1PR12MB9031:EE_ X-MS-Office365-Filtering-Correlation-Id: f7b29437-0bb4-4069-77b7-08dd15a5efd4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|1800799024|7416014|82310400026; X-Microsoft-Antispam-Message-Info: =?utf-8?q?OY7tJ5U6c49fQbdmdyJyWmDBl7jeNuC?= =?utf-8?q?krDCdrg9PJb3GjXU2w3cxPn9hyx0RlzkmDfiBw0gxwoCQTEDrhIeqYh6MnwlNn7Rx?= =?utf-8?q?G+nPWuHTM64IvagvWpa3bfQXD/Gh4XaCOTLS8/9Ax9GiBXZPGnzLbnqiSkOV65OdU?= =?utf-8?q?NBzeQk6szSq5pvrx7g/gt42g5oC/5hUBHfJStbzKQ4QLz+M0sxjoDrh46j1ZShI5C?= =?utf-8?q?l3l/wondSePdVfu9kfCqoUBoEwCGhnUB+NzIemeecIqq/KdlMZjB+ZYgi/E4yr3JG?= =?utf-8?q?Ta4AuEdRB+mt7XFRhDbu9lsdKjzBpfZmdFIUqJOfxfcQT961C4oIDDQdtgFowYw3y?= =?utf-8?q?FU273jrOM65ROHS/AmaHjo6HsQMKGDhELwZ7/QCSZmbbYMNCp0W8bHrwykJFrGIQU?= =?utf-8?q?cKqLE5wHeA9wI+tQfYOJ4mlYPv9qEzIxYLVhRXVUWEEoM+1nQaBgANP02ZDB8MBS3?= =?utf-8?q?NN4XfAyrFBALUREFbOfgPdx9KgDNml6+lDox/95QZ1z3569COYeu0rNJXiGAie7MH?= =?utf-8?q?9KkMLL3kub8tBdOHYuCfB5IC1F36k7YPb14lX3qrxW2HlFrBwiIs1nILYm4zQHfO5?= =?utf-8?q?7t7hjrwZxemVfMesY6QvKoS4sLHVnzU6vTyrl89H9H/K2J6yc4ix/jcAGpWi2sDni?= =?utf-8?q?YycHGZfAHA2kWEU4qQZVs7u9be8mgD5zNCsV8LvowGADfwmnDYNMT6/PPMBIMQiFH?= =?utf-8?q?DPemASXxZH1RuWZ11J/FEbdScYJQQrXXWVNOsPnvtn4GRIFAlG0GNvL3QYB234MQF?= =?utf-8?q?3dN/Q0p0lmLDGvSAwcnzqLXj1hoFYAaFagmof/DaIMYK2a8i75DttorggoeN9N9wS?= =?utf-8?q?Lb6kCJso+kkBwPtyOM2LLUZYM1Kn5oD3ReXXMbEVtyGaPBx7kjWksM3mlQMHB9qfL?= =?utf-8?q?mpsNE5IGOiMWRvnJcoxMaNErf90Y9gfQFOLRzanozjFUEX8HMSNvPPn4okEo+C8W+?= =?utf-8?q?NK1DfMXNq82BFBkyuYWnsv89ZHUJ48XaFuoohiW+Ib+wgtpp3LH5A4WBj98BSTvbI?= =?utf-8?q?vEI4E0H4/fHV5T4E45ggmU/7fVtJKnG/m3VCuFVInj2YdXOuYCCpj5ohfLB5IwIca?= =?utf-8?q?sd0DIT33rDtb5+iL7GTVUcRpBrIllqqqIx2SAQHpgXWpHr+0dgP6qX1YPIlHsdI+K?= =?utf-8?q?cE8qNBWEjrcQDPKaJ0Oe9PJscEX/0fqYBP3EEmiTPGKJhsW1w2bPfhVGmqZIJAE60?= =?utf-8?q?6BoFjmc08kLPKS2pq/O146Irksv9pQ6o5P99NIkwnTqGFzHUSGJJjMuOm+6KJvegF?= =?utf-8?q?Q3H/5Bj+b8QeMITUY6YcTuPcWo6CobqIRNVWCuxYAF5gUZviZ3nqyVCklpC7P4z3w?= =?utf-8?q?OR1l+Sj6jUU4aZIeEdaFhQbIQWf6BaJ+Vy54dk+yYYvQm3zeM1q3JAg7ljVsi0yEz?= =?utf-8?q?Kjv8OO61L6M?= 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)(376014)(1800799024)(7416014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Dec 2024 03:27:39.2381 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f7b29437-0bb4-4069-77b7-08dd15a5efd4 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: SJ1PEPF000023CF.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB9031 The class interface allows changing multiple platform profiles on a system to different values. The semantics of it are similar to the legacy interface. Reviewed-by: Armin Wolf Tested-by: Mark Pearson Reviewed-by: Mark Pearson Reviewed-by: Ilpo Järvinen Signed-off-by: Mario Limonciello --- v10: * Add custom section --- .../ABI/testing/sysfs-platform_profile | 5 +++ .../userspace-api/sysfs-platform_profile.rst | 38 +++++++++++++++++++ 2 files changed, 43 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..7f013356118ae 100644 --- a/Documentation/userspace-api/sysfs-platform_profile.rst +++ b/Documentation/userspace-api/sysfs-platform_profile.rst @@ -40,3 +40,41 @@ 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. + +"Custom" profile support +======================== +The platform_profile class also supports profiles advertising a "custom" +profile. This is intended to be set by drivers when the setttings in the +driver have been modified in a way that a standard profile doesn't represent +the current state. + +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 which driver is associated with a platform profile handler the +user can read the ``name`` attribute of the class device. + +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.