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Thu, 2 Mar 2023 00:19:43 -0600 Received: from vijendar-X570-GAMING-X.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2375.34 via Frontend Transport; Thu, 2 Mar 2023 00:19:39 -0600 From: Vijendar Mukunda To: CC: , , , , , , , , Vijendar Mukunda , Bard Liao , Sanyog Kale , open list Subject: [PATCH V5 8/8] soundwire: amd: add pm_prepare callback and pm ops support Date: Thu, 2 Mar 2023 11:51:07 +0530 Message-ID: <20230302062107.207845-9-Vijendar.Mukunda@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230302062107.207845-1-Vijendar.Mukunda@amd.com> References: <20230302062107.207845-1-Vijendar.Mukunda@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0000E651:EE_|DM4PR12MB6277:EE_ X-MS-Office365-Filtering-Correlation-Id: f3fa4981-d870-47b0-573d-08db1ae61d6f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 7r8v4sEsr12E+mU0EEXgVSS0yrQVr0m5HyLcuay5QhafXXRkyo/75FDPzApJL5v++t4j5pWW3sc7BiTbdDOUwqT9NUOWEmFFyUBjC0WBH0p2gmNDACNIWGIJfnn4ZUTCy0HhJCDZmTmWWmp1y6kzV6HvZljhNamWCq7sjCU8g18KV1MuZtYV6wZLa8rBTPC603cRVt1owcVJ+OFJxOvoPwOrPMwVx7R+sIRPKRRE2NjHp7Gmbzz512IUYb+xRT89FjGe/CN/mdrxlngiU0CVHhyUwNKCNETjh9yGSe0SNrBXYbonvx46jabUvvOpppOmHeM9VzjVb/yDvEW7kOvCwosfskiCvrQ5RyP9DPoXdE/W3emNJ0QRcIFUfNQ9nmVWvXLrhZ6A74XQA06pxwVJ+pvrv9rTZPLp8rfWcZa053CtLr/aJgY9N9Z/Ug2koLMFJVj7SGYxUhrTsEbFZKUs87dSXN9l/ybUgK8vzJT4841B9CSWKTyGWSr5Z7kqoXX4dF3EQSMHZoPeCf0d2NyEH6k3PpqLYkHYtcDzBnpgQ3k9q7pZ5Qul5QgnIjTEtw+fFCqPxGWKW/mGtlWi0i4C6t75ekjO+orIiEASTtYoHktIw/Jbrfql92uJ7j/H3B/VHaslP0S4nqyZu23kg1TVeX0rwj/5UKrqudpfwCX6DQbXkiwl9tjr6SIj6OjtbXfyGiFn/gkWGI4ZsfhcCWrrMB/wcWXtar/gdxZoTwr/ssQ= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(136003)(39860400002)(376002)(396003)(346002)(451199018)(46966006)(36840700001)(40470700004)(7696005)(36756003)(356005)(86362001)(41300700001)(8936002)(40480700001)(8676002)(6916009)(5660300002)(4326008)(70206006)(82740400003)(36860700001)(81166007)(6666004)(316002)(54906003)(478600001)(70586007)(47076005)(82310400005)(2906002)(83380400001)(426003)(186003)(336012)(1076003)(26005)(2616005)(40460700003)(36900700001);DIR:OUT;SFP:1101; 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Signed-off-by: Vijendar Mukunda Signed-off-by: Mastan Katragadda --- drivers/soundwire/amd_manager.c | 85 +++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c index 1caad2ccdd20..f7e68702ee7a 100644 --- a/drivers/soundwire/amd_manager.c +++ b/drivers/soundwire/amd_manager.c @@ -1148,6 +1148,89 @@ static int amd_sdw_clock_stop_exit(struct amd_sdw_manager *amd_manager) return 0; } +static int amd_resume_child_device(struct device *dev, void *data) +{ + struct sdw_slave *slave = dev_to_sdw_dev(dev); + int ret; + + if (!slave->probed) { + dev_dbg(dev, "skipping device, no probed driver\n"); + return 0; + } + if (!slave->dev_num_sticky) { + dev_dbg(dev, "skipping device, never detected on bus\n"); + return 0; + } + if (!pm_runtime_suspended(dev)) + return 0; + ret = pm_request_resume(dev); + if (ret < 0) + dev_err(dev, "pm_request_resume failed: %d\n", ret); + + return ret; +} + +static int __maybe_unused amd_pm_prepare(struct device *dev) +{ + struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev); + struct sdw_bus *bus = &amd_manager->bus; + int ret; + + if (bus->prop.hw_disabled) { + dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n", + bus->link_id); + return 0; + } + /* + * When multiple peripheral devices connected over the same link, if SoundWire manager + * device is not in runtime suspend state, observed that device alerts are missing + * without pm_prepare on AMD platforms in clockstop mode0. + */ + if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) { + ret = pm_request_resume(dev); + if (ret < 0) { + dev_err(bus->dev, "pm_request_resume failed: %d\n", ret); + return 0; + } + } + /* To force peripheral devices to system level suspend state, resume the devices + * from runtime suspend state first. Without that unable to dispatch the alert + * status to peripheral driver during system level resume as they are in runtime + * suspend state. + */ + ret = device_for_each_child(bus->dev, NULL, amd_resume_child_device); + if (ret < 0) + dev_err(dev, "amd_resume_child_device failed: %d\n", ret); + return 0; +} + +static int __maybe_unused amd_suspend(struct device *dev) +{ + struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev); + struct sdw_bus *bus = &amd_manager->bus; + int ret; + + if (bus->prop.hw_disabled) { + dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n", + bus->link_id); + return 0; + } + + if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) { + return amd_sdw_clock_stop(amd_manager); + } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) { + /* + * As per hardware programming sequence on AMD platforms, + * clock stop should be invoked first before powering-off + */ + ret = amd_sdw_clock_stop(amd_manager); + if (ret) + return ret; + return amd_deinit_sdw_manager(amd_manager); + } + return 0; +} + static int __maybe_unused amd_suspend_runtime(struct device *dev) { struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev); @@ -1220,6 +1303,8 @@ static int __maybe_unused amd_resume_runtime(struct device *dev) } static const struct dev_pm_ops amd_pm = { + .prepare = amd_pm_prepare, + SET_SYSTEM_SLEEP_PM_OPS(amd_suspend, amd_resume_runtime) SET_RUNTIME_PM_OPS(amd_suspend_runtime, amd_resume_runtime, NULL) };