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Fri, 10 Mar 2023 10:22:31 -0600 From: Vijendar Mukunda To: CC: , , , , , , , , , Vijendar Mukunda , Bard Liao , Sanyog Kale , open list Subject: [PATCH V7 8/8] soundwire: amd: add pm_prepare callback and pm ops support Date: Fri, 10 Mar 2023 21:55:54 +0530 Message-ID: <20230310162554.699766-9-Vijendar.Mukunda@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230310162554.699766-1-Vijendar.Mukunda@amd.com> References: <20230310162554.699766-1-Vijendar.Mukunda@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT066:EE_|SA0PR12MB4493:EE_ X-MS-Office365-Filtering-Correlation-Id: 42bd39a8-474b-4f18-2bba-08db2183a8e7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:(13230025)(4636009)(396003)(376002)(39860400002)(136003)(346002)(451199018)(46966006)(40470700004)(36840700001)(36756003)(83380400001)(47076005)(426003)(82740400003)(6666004)(36860700001)(1076003)(26005)(7696005)(186003)(336012)(40460700003)(2616005)(8936002)(41300700001)(6916009)(70206006)(70586007)(8676002)(4326008)(86362001)(5660300002)(2906002)(40480700001)(356005)(81166007)(316002)(478600001)(54906003)(82310400005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Mar 2023 16:22:36.0743 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 42bd39a8-474b-4f18-2bba-08db2183a8e7 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: BN8NAM11FT066.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4493 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add pm_prepare callback and System level pm ops support for AMD SoundWire manager driver. Signed-off-by: Vijendar Mukunda Signed-off-by: Mastan Katragadda --- drivers/soundwire/amd_manager.c | 84 +++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c index fe9f5ae84a23..3698bb8e00d4 100644 --- a/drivers/soundwire/amd_manager.c +++ b/drivers/soundwire/amd_manager.c @@ -1079,6 +1079,88 @@ 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; + } + ret = pm_request_resume(dev); + if (ret < 0) { + dev_err(dev, "pm_request_resume failed: %d\n", ret); + return ret; + } + return 0; +} + +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); @@ -1141,6 +1223,8 @@ 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) }; -- 2.34.1