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GET /api/patches/2218994/?format=api
{ "id": 2218994, "url": "http://patchwork.ozlabs.org/api/patches/2218994/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/bf216cd8652419e9ce7b9133775a2ea4509fe763.1775121078.git.simona.toaca@nxp.com/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<bf216cd8652419e9ce7b9133775a2ea4509fe763.1775121078.git.simona.toaca@nxp.com>", "list_archive_url": null, "date": "2026-04-02T09:40:47", "name": "[v3,5/6] doc: board: nxp: Add Quickboot documentation", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": false, "hash": "f88d72f5cc252eda805ee9b537380ad4d2795c22", "submitter": { "id": 92829, "url": "http://patchwork.ozlabs.org/api/people/92829/?format=api", "name": "Simona Toaca", "email": "simona.toaca@oss.nxp.com" }, "delegate": { "id": 151988, "url": "http://patchwork.ozlabs.org/api/users/151988/?format=api", "username": "festevam", "first_name": "Fabio", "last_name": "Estevam", "email": "festevam@gmail.com" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/bf216cd8652419e9ce7b9133775a2ea4509fe763.1775121078.git.simona.toaca@nxp.com/mbox/", "series": [ { "id": 498456, "url": "http://patchwork.ozlabs.org/api/series/498456/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=498456", "date": "2026-04-02T09:40:42", "name": "imx9{4,5,52}: Add Quickboot support", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/498456/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218994/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218994/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com\n header.a=rsa-sha256 header.s=selector1-NXP1-onmicrosoft-com\n header.b=GRgTkU8o;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=85.214.62.61; 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mx.microsoft.com 1; spf=pass\n smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com;\n dkim=pass header.d=oss.nxp.com; arc=none", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com;\n s=selector1-NXP1-onmicrosoft-com;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=/V5c6KnMRM11UFc7kOcxwmzEdMdQ24z3zwt7vcI+6Ms=;\n b=GRgTkU8osAikp5TG5btr4BNNUdBAoBJRZiorbsSVS0gai2UrP3BA7lH7/vcaQWjy3EfcfExbJgfXBkGIX8vWxZA36l5CLIXXqR4QCkcmVfcrShm/HOusrzypL/48Gj7s6398n8LEqu+gTIrUhUfYCISYRWDlXuNIwvJ5dpDUhgrXKohZOQOzSTJcl4tQsQxRbQ+6d8omHpfIsPm4i6AKu7ETQ92ckx+GVuuctfyvbd99ViHpWPWUtzfgY/kvDTAZFpNazNwZSC0t8b0wsCXv8zzMUf9DayK6vC+PUilxXnHyp8YWXY8cKW8u9OCcQiOnB36Ho2Io0vRijKNsERKLRA==", "From": "\"Simona Toaca (OSS)\" <simona.toaca@oss.nxp.com>", "To": "uboot-imx@nxp.com,\n\tu-boot@lists.denx.de", "Cc": "Stefano Babic <sbabic@nabladev.com>, festevam@gmail.com, peng.fan@nxp.com,\n alice.guo@nxp.com, viorel.suman@nxp.com, simona.toaca@nxp.com,\n ye.li@nxp.com, ping.bai@nxp.com, marex@nabladev.com,\n sebastien.szymanski@armadeus.com, ravi@prevas.dk,\n joao.goncalves@toradex.com, ji.luo@nxp.com, semen.protsenko@linaro.org,\n tharvey@gateworks.com, qijian.guo@nxp.com", "Subject": "[PATCH v3 5/6] doc: board: nxp: Add Quickboot documentation", "Date": "Thu, 2 Apr 2026 12:40:47 +0300", "Message-ID": "\n <bf216cd8652419e9ce7b9133775a2ea4509fe763.1775121078.git.simona.toaca@nxp.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<cover.1775121078.git.simona.toaca@nxp.com>", "References": "<cover.1775121078.git.simona.toaca@nxp.com>", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "FR4P281CA0122.DEUP281.PROD.OUTLOOK.COM\n (2603:10a6:d10:b9::6) To VI0PR04MB11917.eurprd04.prod.outlook.com\n (2603:10a6:800:306::9)", "MIME-Version": "1.0", "X-MS-Exchange-MessageSentRepresentingType": "1", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "VI0PR04MB11917:EE_|AM7PR04MB7095:EE_", "X-MS-Office365-Filtering-Correlation-Id": "cb6156a9-2fe0-4a99-0528-08de909a5b95", "X-MS-Exchange-SharedMailbox-RoutingAgent-Processed": "True", "X-LD-Processed": "686ea1d3-bc2b-4c6f-a92c-d99c5c301635,ExtAddr", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n ARA:13230040|366016|19092799006|376014|1800799024|18002099003|22082099003|56012099003;", "X-Microsoft-Antispam-Message-Info": "\n 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", "X-Forefront-Antispam-Report": "CIP:255.255.255.255; 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SPDX-License-Identifier: GPL-2.0+\n+ Copyright 2026 NXP\n+\n+DDR QuickBoot flow\n+------------------\n+\n+Some NXP boards (which use OEI - iMX943, iMX95, iMX952 etc.) support saving\n+DDR training data (collected by OEI during Training flow) from volatile\n+to non-volatile memory, which is then available to OEI at next cold reboot.\n+OEI uses the saved data to run Quickboot flow and avoid training the DDR again.\n+This significantly reduces the boot time.\n+\n+The location of the qb data in NVM is a space left in the bootloader by\n+mkimage, with the size of 64K. The qb command searches for this space to\n+save the data. Thus, the NVM should also be a boot device.\n+\n+U-Boot provides no authentication for qb data, only its integrity\n+is verified via the CRC32. The authentication is done in OEI. With\n+the exception of iMX95 A0/A1, which use CRC32 as well for verifying\n+the data, the rest of the boards use ELE to verify the MAC stored\n+in the ddrphy_qb_state structure.\n+\n+If the quickboot data in memory is not valid (CRC32 check fails),\n+U-Boot does not save it to NVM. So, if OEI runs Quickboot flow -> no\n+data is written to volatile memory -> invalid data -> no saving happens\n+(qb save fails during qb check).\n+\n+After successful saving, U-Boot clears the data in volatile memory so\n+that qb check fails at next reboot and the NVM isn't accessed again.\n+\n+There are 2 ways to save this data, both can be enabled:\n+\n+1. automatically, in SPL (by enabling CONFIG_SPL_IMX_QB)\n+\n+- this will save the data on the current boot device (e.g. SD)\n+- other configs specific to the boot device need to be enabled (CONFIG_SPL_MMC_WRITE for saving to eMMC/SD)\n+- use for: automating qb save / saving qb data if using Falcon mode (skipping U-Boot proper)\n+\n+2. using qb command in U-Boot console (by enabling CONFIG_CMD_IMX_QB)\n+\n+- supports saving on the current boot device, or on another, specified device.\n+- if flashing via uuu, the command can be added in an uuu script (boot device needs to be specified)\n+- use 'qb erase' to force DDR re-training\n+- use for: saving qb data during flashing / controlling the NVM to save to / forcing re-training\n+\n+::\n+\n+ # To save/erase on current boot device\n+ => qb save/erase\n+\n+ # To save/erase on other boot device\n+ => qb save/erase mmc 0 # eMMC\n+ => qb save/erase mmc 1 # SD\n+ => qb save/erase spi # NOR SPI\n", "prefixes": [ "v3", "5/6" ] }