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Wed, 11 Jan 2023 01:03:21 -0800 Received: from vijendar-X570-GAMING-X.amd.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2375.34 via Frontend Transport; Wed, 11 Jan 2023 03:03:18 -0600 From: Vijendar Mukunda To: , , Subject: [PATCH 17/19] soundwire: amd: add pm_prepare callback and pm ops support Date: Wed, 11 Jan 2023 14:32:20 +0530 Message-ID: <20230111090222.2016499-18-Vijendar.Mukunda@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230111090222.2016499-1-Vijendar.Mukunda@amd.com> References: <20230111090222.2016499-1-Vijendar.Mukunda@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT034:EE_|SN7PR12MB7420:EE_ X-MS-Office365-Filtering-Correlation-Id: 5ee6e24e-ba8e-43d9-edd9-08daf3b2bda6 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; 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Signed-off-by: Vijendar Mukunda Signed-off-by: Mastan Katragadda --- drivers/soundwire/amd_master.c | 76 ++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/drivers/soundwire/amd_master.c b/drivers/soundwire/amd_master.c index 2fd77a673c22..f4478cc17aac 100644 --- a/drivers/soundwire/amd_master.c +++ b/drivers/soundwire/amd_master.c @@ -1552,6 +1552,80 @@ static int amd_sdwc_clock_stop_exit(struct amd_sdwc_ctrl *ctrl) return 0; } +static int amd_resume_child_device(struct device *dev, void *data) +{ + int ret; + struct sdw_slave *slave = dev_to_sdw_dev(dev); + + 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, "%s: pm_request_resume failed: %d\n", __func__, ret); + + return ret; +} + +static int __maybe_unused amd_pm_prepare(struct device *dev) +{ + struct amd_sdwc_ctrl *ctrl = dev_get_drvdata(dev); + struct sdw_bus *bus = &ctrl->bus; + int ret; + + if (bus->prop.hw_disabled || !ctrl->startup_done) { + dev_dbg(bus->dev, "SoundWire master %d is disabled or not-started, ignoring\n", + bus->link_id); + return 0; + } + ret = device_for_each_child(bus->dev, NULL, amd_resume_child_device); + if (ret < 0) + dev_err(dev, "%s: amd_resume_child_device failed: %d\n", __func__, ret); + if (pm_runtime_suspended(dev) && ctrl->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; + } + } + return 0; +} + +static int __maybe_unused amd_suspend(struct device *dev) +{ + struct amd_sdwc_ctrl *ctrl = dev_get_drvdata(dev); + struct sdw_bus *bus = &ctrl->bus; + int ret; + + if (bus->prop.hw_disabled || !ctrl->startup_done) { + dev_dbg(bus->dev, "SoundWire master %d is disabled or not-started, ignoring\n", + bus->link_id); + return 0; + } + + if (ctrl->power_mode_mask & AMD_SDW_CLK_STOP_MODE) { + ret = amd_sdwc_clock_stop(ctrl); + if (ret) + return ret; + } else if (ctrl->power_mode_mask & AMD_SDW_POWER_OFF_MODE) { + ret = amd_sdwc_clock_stop(ctrl); + if (ret) + return ret; + ret = amd_deinit_sdw_controller(ctrl); + if (ret) + return ret; + } + return 0; +} + static int __maybe_unused amd_suspend_runtime(struct device *dev) { struct amd_sdwc_ctrl *ctrl = dev_get_drvdata(dev); @@ -1638,6 +1712,8 @@ 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) };