From patchwork Mon Feb 13 09:40:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijendar Mukunda X-Patchwork-Id: 653496 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 77972C636CC for ; Mon, 13 Feb 2023 09:41:17 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 031DC84D; Mon, 13 Feb 2023 10:40:25 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 031DC84D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1676281275; bh=un4YWUkY79FtE2xZsdouboCEKQgThl3bE2JVvYxvrv0=; h=From:To:Subject:Date:In-Reply-To:References:CC:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=H17EXgcqagnzarTttwGYzg9tCECzLYa599eYysAMsxLHTzf/bTUDnWzC9fuzM89u5 Aw7A1DO7OA8ZrZGyXwiv1rrXzHfWZRzp3UViLUcxMBIwvMlt3nX/uX5WqmGmJrrA3K qL3xwU7yArIxfT+48zGdkH/yrFjBvxBlTc332hLw= Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 03A41F805A8; Mon, 13 Feb 2023 10:38:29 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 5A80EF80571; Mon, 13 Feb 2023 10:38:11 +0100 (CET) Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on20610.outbound.protection.outlook.com [IPv6:2a01:111:f400:fe59::610]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id EF14FF80564 for ; Mon, 13 Feb 2023 10:37:53 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz EF14FF80564 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key, unprotected) header.d=amd.com header.i=@amd.com header.a=rsa-sha256 header.s=selector1 header.b=QV+WF+FH ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=CmJDRtbqU1dszNZml9CfbfkHmdW2LfE9NZKX/BlAnCvRfVURFZYSbXnUzdxgL6Cx61PlNGmG15wE/ioUVEP+oyaiqg6tOHsE3162Nnb1FT2XmRH7Sxn0jsSm3jt+Wo70aF/4e+cPgculPjc27C0jESpEsURAmtlE0uCjwp+s0iCAxGvnqKsNp5IM81p5+4NyrW3/IdPaH9SFM4tZAHUNtbKygLRt6rHRZ3JeCWW0ysrICxjTKERuPQbQ8xOCckHDvr6aUs7PdzpfFNWajbp+RS25mVCKN9bHva+9nmDLSp81qUCy9m/sKQmFM+Wb3frCLfhF1KzaOq/GZ/poqWiMzQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=AbeJQZWQgLfyB7IzvVWU5jNKASoL3N0KVTuKWhlcmlA=; b=aWKF8BgjAcOuMMzSJxTbF97ttA/dg/HKU+tlgGOs883iBPV7dIqKEfTPX6t1xRHzDwkX8bTAH7v7VrVRmcgypnY8RDrjQ4vYAVjyNxzQZ5Sr3cAPWlUm5jwDQrWo9VM+MyBX3AmOLeBDGw79hMa4mTnS9ZQN7mmBJfXXSCwblqUO071GfDfGGxGMZxaL6MA5uAxcX/Wwh4UkFkkyHlyxGKol4TeieEmwnmzz0LQINGoUobxE6FN5f5kj7SBuOPe7BJnRgTNVYlbukoMimQW3YNYngKzJN/rqh3reSAVUwu2B5Urhjuwvci/pqSAi/lOgyPGteYlcLZIlQPjDax16Ng== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=kernel.org 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 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=AbeJQZWQgLfyB7IzvVWU5jNKASoL3N0KVTuKWhlcmlA=; b=QV+WF+FH1HklkkuhR5CilmJk9xaZgT07YB7G6C6b9Zi8pHkf4V1QKun63hsPpJGDHxrfEp5qwEOnOOtSMC3lPSBDATjh6maRSm02n62PcCUDCh7BGR2K23uQvodxjQUoSyf59i5UrEgzI7rn2dviTdSHGbB8VRGBxJiqHhjnS2c= Received: from BN0PR10CA0026.namprd10.prod.outlook.com (2603:10b6:408:143::21) by DS7PR12MB8347.namprd12.prod.outlook.com (2603:10b6:8:e5::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6086.24; Mon, 13 Feb 2023 09:37:50 +0000 Received: from BN8NAM11FT074.eop-nam11.prod.protection.outlook.com (2603:10b6:408:143:cafe::ee) by BN0PR10CA0026.outlook.office365.com (2603:10b6:408:143::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6086.24 via Frontend Transport; Mon, 13 Feb 2023 09:37:50 +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 BN8NAM11FT074.mail.protection.outlook.com (10.13.176.154) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6086.24 via Frontend Transport; Mon, 13 Feb 2023 09:37:50 +0000 Received: from SATLEXMB06.amd.com (10.181.40.147) 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 15.1.2375.34; Mon, 13 Feb 2023 03:37:49 -0600 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB06.amd.com (10.181.40.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Mon, 13 Feb 2023 03:37:49 -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; Mon, 13 Feb 2023 03:37:45 -0600 From: Vijendar Mukunda To: Subject: [PATCH V2 5/8] soundwire: amd: add soundwire manager interrupt handling Date: Mon, 13 Feb 2023 15:10:28 +0530 Message-ID: <20230213094031.2231058-6-Vijendar.Mukunda@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230213094031.2231058-1-Vijendar.Mukunda@amd.com> References: <20230213094031.2231058-1-Vijendar.Mukunda@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT074:EE_|DS7PR12MB8347:EE_ X-MS-Office365-Filtering-Correlation-Id: b8b67c5e-06da-460c-a5d5-08db0da5f904 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)(376002)(346002)(39860400002)(396003)(136003)(451199018)(40470700004)(46966006)(36840700001)(40460700003)(36756003)(86362001)(54906003)(316002)(8676002)(4326008)(1076003)(70586007)(6666004)(7696005)(82310400005)(478600001)(2906002)(70206006)(6916009)(41300700001)(8936002)(5660300002)(81166007)(356005)(82740400003)(36860700001)(40480700001)(2616005)(336012)(26005)(186003)(83380400001)(47076005)(426003)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Feb 2023 09:37:50.1184 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b8b67c5e-06da-460c-a5d5-08db0da5f904 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: BN8NAM11FT074.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB8347 Message-ID-Hash: 2XAVHHJUJGI72L3GIUCIBC4OEBCZTQI6 X-Message-ID-Hash: 2XAVHHJUJGI72L3GIUCIBC4OEBCZTQI6 X-MailFrom: Vijendar.Mukunda@amd.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: amadeuszx.slawinski@linux.intel.com, Mario.Limonciello@amd.com, Sunil-kumar.Dommati@amd.com, Basavaraj.Hiregoudar@amd.com, Mastan.Katragadda@amd.com, Arungopal.kondaveeti@amd.com, Vijendar Mukunda , Bard Liao , Pierre-Louis Bossart , Sanyog Kale , "moderated list:SOUNDWIRE SUBSYSTEM" , open list X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Add support for handling soundwire manager interrupts. Signed-off-by: Vijendar Mukunda Signed-off-by: Mastan Katragadda --- drivers/soundwire/amd_manager.c | 132 ++++++++++++++++++++++++++++++ drivers/soundwire/amd_manager.h | 1 + include/linux/soundwire/sdw_amd.h | 7 ++ 3 files changed, 140 insertions(+) diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c index 14c88b80ab6d..87f9a987d93a 100644 --- a/drivers/soundwire/amd_manager.c +++ b/drivers/soundwire/amd_manager.c @@ -417,6 +417,47 @@ static enum sdw_command_response amd_sdw_xfer_msg(struct sdw_bus *bus, struct sd return SDW_CMD_OK; } +static void amd_sdw_process_ping_status(u64 response, struct amd_sdw_manager *amd_manager) +{ + u64 slave_stat = 0; + u32 val = 0; + u16 dev_index; + + /* slave status response*/ + slave_stat = FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_0_3, response); + slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_4_11, response) << 8; + + dev_dbg(amd_manager->dev, "%s: slave_stat:0x%llx\n", __func__, slave_stat); + for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) { + val = (slave_stat >> (dev_index * 2)) & AMD_SDW_MCP_SLAVE_STATUS_MASK; + dev_dbg(amd_manager->dev, "%s val:0x%x\n", __func__, val); + switch (val) { + case SDW_SLAVE_ATTACHED: + amd_manager->status[dev_index] = SDW_SLAVE_ATTACHED; + break; + case SDW_SLAVE_UNATTACHED: + amd_manager->status[dev_index] = SDW_SLAVE_UNATTACHED; + break; + case SDW_SLAVE_ALERT: + amd_manager->status[dev_index] = SDW_SLAVE_ALERT; + break; + default: + amd_manager->status[dev_index] = SDW_SLAVE_RESERVED; + break; + } + } +} + +static void amd_sdw_read_and_process_ping_status(struct amd_sdw_manager *amd_manager) +{ + u64 response = 0; + + mutex_lock(&amd_manager->bus.msg_lock); + response = amd_sdw_send_cmd_get_resp(amd_manager, 0, 0); + mutex_unlock(&amd_manager->bus.msg_lock); + amd_sdw_process_ping_status(response, amd_manager); +} + static u32 amd_sdw_read_ping_status(struct sdw_bus *bus) { struct amd_sdw_manager *amd_manager = to_amd_sdw(bus); @@ -817,6 +858,95 @@ static int amd_sdw_register_dais(struct amd_sdw_manager *amd_manager) dais, num_dais); } +static void amd_sdw_update_slave_status_work(struct work_struct *work) +{ + struct amd_sdw_manager *amd_manager = + container_of(work, struct amd_sdw_manager, amd_sdw_work); + int retry_count = 0; + + if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) { + acp_reg_writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7); + acp_reg_writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11); + } + +update_status: + sdw_handle_slave_status(&amd_manager->bus, amd_manager->status); + if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) { + if (retry_count++ < SDW_MAX_DEVICES) { + acp_reg_writel(AMD_SDW_IRQ_MASK_0TO7, amd_manager->mmio + + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7); + acp_reg_writel(AMD_SDW_IRQ_MASK_8TO11, + amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11); + amd_sdw_read_and_process_ping_status(amd_manager); + goto update_status; + } else { + dev_err_ratelimited(amd_manager->dev, + "Device0 detected after %d iterations\n", + retry_count); + } + } +} + +static void amd_sdw_update_slave_status(u32 status_change_0to7, u32 status_change_8to11, + struct amd_sdw_manager *amd_manager) +{ + u64 slave_stat = 0; + u32 val = 0; + int dev_index; + + if (status_change_0to7 == AMD_SDW_SLAVE_0_ATTACHED) + memset(amd_manager->status, 0, sizeof(amd_manager->status)); + slave_stat = status_change_0to7; + slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STATUS_8TO_11, status_change_8to11) << 32; + dev_dbg(amd_manager->dev, "%s: status_change_0to7:0x%x status_change_8to11:0x%x\n", + __func__, status_change_0to7, status_change_8to11); + if (slave_stat) { + for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) { + if (slave_stat & AMD_SDW_MCP_SLAVE_STATUS_VALID_MASK(dev_index)) { + val = (slave_stat >> AMD_SDW_MCP_SLAVE_STAT_SHIFT_MASK(dev_index)) & + AMD_SDW_MCP_SLAVE_STATUS_MASK; + switch (val) { + case SDW_SLAVE_ATTACHED: + amd_manager->status[dev_index] = SDW_SLAVE_ATTACHED; + break; + case SDW_SLAVE_UNATTACHED: + amd_manager->status[dev_index] = SDW_SLAVE_UNATTACHED; + break; + case SDW_SLAVE_ALERT: + amd_manager->status[dev_index] = SDW_SLAVE_ALERT; + break; + default: + amd_manager->status[dev_index] = SDW_SLAVE_RESERVED; + break; + } + } + } + } +} + +static void amd_sdw_irq_thread(struct work_struct *work) +{ + struct amd_sdw_manager *amd_manager = + container_of(work, struct amd_sdw_manager, amd_sdw_irq_thread); + u32 status_change_8to11; + u32 status_change_0to7; + + status_change_8to11 = acp_reg_readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11); + status_change_0to7 = acp_reg_readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7); + dev_dbg(amd_manager->dev, "%s [SDW%d] SDW INT: 0to7=0x%x, 8to11=0x%x\n", + __func__, amd_manager->instance, status_change_0to7, status_change_8to11); + if (status_change_8to11 & AMD_SDW_PREQ_INTR_STAT) { + amd_sdw_read_and_process_ping_status(amd_manager); + } else { + /* Check for the updated status on peripheral device */ + amd_sdw_update_slave_status(status_change_0to7, status_change_8to11, amd_manager); + } + if (status_change_8to11 || status_change_0to7) + schedule_work(&amd_manager->amd_sdw_work); + acp_reg_writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11); + acp_reg_writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7); +} + static void amd_sdw_probe_work(struct work_struct *work) { struct amd_sdw_manager *amd_manager = container_of(work, struct amd_sdw_manager, @@ -909,6 +1039,8 @@ static int amd_sdw_manager_probe(struct platform_device *pdev) return ret; } dev_set_drvdata(dev, amd_manager); + INIT_WORK(&amd_manager->amd_sdw_irq_thread, amd_sdw_irq_thread); + INIT_WORK(&amd_manager->amd_sdw_work, amd_sdw_update_slave_status_work); INIT_WORK(&amd_manager->probe_work, amd_sdw_probe_work); schedule_work(&amd_manager->probe_work); return 0; diff --git a/drivers/soundwire/amd_manager.h b/drivers/soundwire/amd_manager.h index 3e1bded1e769..5bcaf7a763bb 100644 --- a/drivers/soundwire/amd_manager.h +++ b/drivers/soundwire/amd_manager.h @@ -186,6 +186,7 @@ #define AMD_SDW1_PAD_KEEPER_EN_MASK 0x10 #define AMD_SDW0_PAD_KEEPER_DISABLE_MASK 0x1E #define AMD_SDW1_PAD_KEEPER_DISABLE_MASK 0xF +#define AMD_SDW_PREQ_INTR_STAT BIT(19) enum amd_sdw_cmd_type { AMD_SDW_CMD_PING = 0, diff --git a/include/linux/soundwire/sdw_amd.h b/include/linux/soundwire/sdw_amd.h index c978cfbc0207..003b8a197fc5 100644 --- a/include/linux/soundwire/sdw_amd.h +++ b/include/linux/soundwire/sdw_amd.h @@ -45,8 +45,11 @@ struct sdw_amd_dai_runtime { * @mmio: soundwire registers mmio base * @acp_mmio: acp registers mmio base * @reg_mask: register mask structure per manager instance + * @amd_sdw_irq_thread: soundwire manager irq workqueue + * @amd_sdw_work: peripheral status work queue * @probe_work: soundwire manager probe workqueue * @sdw_lock: mutex to protect acp share register access + * @status: peripheral devices status array * @num_din_ports: number of input ports * @num_dout_ports: number of output ports * @cols_index: Column index in frame shape @@ -65,10 +68,14 @@ struct amd_sdw_manager { void __iomem *acp_mmio; struct sdw_manager_reg_mask *reg_mask; + struct work_struct amd_sdw_irq_thread; + struct work_struct amd_sdw_work; struct work_struct probe_work; /* mutex to protect acp common register access */ struct mutex *sdw_lock; + enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; + int num_din_ports; int num_dout_ports;