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{ "id": 2230859, "url": "http://patchwork.ozlabs.org/api/1.1/covers/2230859/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-tegra/cover/20260430070954.1005564-1-amhetre@nvidia.com/", "project": { "id": 21, "url": "http://patchwork.ozlabs.org/api/1.1/projects/21/?format=api", "name": "Linux Tegra Development", "link_name": "linux-tegra", "list_id": "linux-tegra.vger.kernel.org", "list_email": "linux-tegra@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260430070954.1005564-1-amhetre@nvidia.com>", "date": "2026-04-30T07:09:52", "name": "[V2,0/2] memory: tegra: Restore MC state on system resume", "submitter": { "id": 75198, "url": "http://patchwork.ozlabs.org/api/1.1/people/75198/?format=api", "name": "Ashish Mhetre", "email": "amhetre@nvidia.com" }, "mbox": "http://patchwork.ozlabs.org/project/linux-tegra/cover/20260430070954.1005564-1-amhetre@nvidia.com/mbox/", "series": [ { "id": 502220, "url": "http://patchwork.ozlabs.org/api/1.1/series/502220/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-tegra/list/?series=502220", "date": "2026-04-30T07:09:52", "name": "memory: tegra: Restore MC state on system resume", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/502220/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2230859/comments/", "headers": { "Return-Path": "\n <linux-tegra+bounces-14069-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-tegra@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=W0a1GmQC;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; 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pr=C", "From": "Ashish Mhetre <amhetre@nvidia.com>", "To": "<krzk@kernel.org>, <thierry.reding@kernel.org>, <jonathanh@nvidia.com>", "CC": "<ketanp@nvidia.com>, <linux-kernel@vger.kernel.org>,\n\t<linux-tegra@vger.kernel.org>, Ashish Mhetre <amhetre@nvidia.com>", "Subject": "[PATCH V2 0/2] memory: tegra: Restore MC state on system resume", "Date": "Thu, 30 Apr 2026 07:09:52 +0000", "Message-ID": "<20260430070954.1005564-1-amhetre@nvidia.com>", "X-Mailer": "git-send-email 2.50.1", "Precedence": "bulk", "X-Mailing-List": "linux-tegra@vger.kernel.org", "List-Id": "<linux-tegra.vger.kernel.org>", "List-Subscribe": "<mailto:linux-tegra+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-tegra+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "X-NVConfidentiality": "public", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-NV-OnPremToCloud": "ExternallySecured", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "DS2PEPF00003448:EE_|DS0PR12MB7536:EE_", "X-MS-Office365-Filtering-Correlation-Id": "bff27071-6a73-49be-eb44-08dea68785b0", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "\n\tBCL:0;ARA:13230040|82310400026|36860700016|376014|1800799024|18002099003|56012099003;", "X-Microsoft-Antispam-Message-Info": "\n\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", "X-Forefront-Antispam-Report": "\n\tCIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(36860700016)(376014)(1800799024)(18002099003)(56012099003);DIR:OUT;SFP:1101;", "X-MS-Exchange-AntiSpam-MessageData-ChunkCount": "1", "X-MS-Exchange-AntiSpam-MessageData-0": "\n\tJIjsmealATqo7tCALe5BbCENwYc9UwUA/VH3skRXm4o7iAQTMMwhXVTm26dd8tmdJL2rrqMJ4CWrM964jSxs3o5ggJXOP22FsM8wNLVZLrYPO5VV/ibN72z4q63WGH7unBEroUt4+jjYOLIZCTJsz8opnhY4piYiWN9rCu/wPI9rjsjvOI9+TVGM/001fRAnhCV/9kyKzzECamuUa8k4dyFvYzs8RaiwLhfa1czVPAkPnGKzPEFl1vdnLwaD5BEaztX8aeQpDNzwj6OioCqDDbeGawMvuSVCp6TUquDtHxY4OjBlhrAozOH++pteW4I22Aw+rvZzRDfyw2W8YHkTD97VDsU7FSBksfr5vDnohl3/6iRFSvelKvj3vrmul45fnjuhTEu9HUoCn7A85xUUn3C63TtkvEMV/98ELijcAU48W7TO4AP2oK6X0dQ2p+gm", "X-OriginatorOrg": "Nvidia.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "30 Apr 2026 07:10:12.5444\n (UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n bff27071-6a73-49be-eb44-08dea68785b0", "X-MS-Exchange-CrossTenant-Id": "43083d15-7273-40c1-b7db-39efd9ccc17a", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "\n TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n\tDS2PEPF00003448.namprd04.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "DS0PR12MB7536" }, "content": "The tegra-mc platform driver does not register any dev_pm_ops, so the\nSoC-specific ->resume() is never invoked (e.g. tegra186_mc_resume) on\nsystem wake. On Tegra186 and later this means MC client Stream-ID\noverride registers are not reprogrammed.\n\nRegister a dev_pm_ops on the tegra-mc driver and route the system\nresume callback into mc->soc->ops->resume() so the existing SID\nrestore path runs again on wake.\n\nThe MC interrupt mask registers also lose state across SC7, so\nre-apply them on resume. Factor the existing intmask programming\nout of tegra_mc_probe() into tegra_mc_setup_intmask() and reuse it\nfrom both probe and resume to avoid duplicating the loop.\n\nNo suspend callback is needed as the resume path reprograms all MC\nstate from the static SoC tables, so there is nothing to save.\n\nChanges in V2:\n- Split the original single patch into two - register the PM ops and\n reprogram the MC interrupt masks on resume.\n\nAshish Mhetre (2):\n memory: tegra: Wire up system sleep PM ops\n memory: tegra: Restore MC interrupt masks on resume\n\n drivers/memory/tegra/mc.c | 41 ++++++++++++++++++++++++++++++++-------\n 1 file changed, 34 insertions(+), 7 deletions(-)" }