[{"id":3673384,"web_url":"http://patchwork.ozlabs.org/comment/3673384/","msgid":"<7c546ff6-8d17-412b-99fe-42a786b02929@mailbox.org>","list_archive_url":null,"date":"2026-04-03T23:27:44","subject":"Re: [PATCH v3 5/6] doc: board: nxp: Add Quickboot documentation","submitter":{"id":85664,"url":"http://patchwork.ozlabs.org/api/people/85664/","name":"Marek Vasut","email":"marek.vasut@mailbox.org"},"content":"On 4/2/26 11:40 AM, Simona Toaca (OSS) wrote:\n\n[...]\n\n> +DDR QuickBoot flow\n> +------------------\n> +\n> +Some NXP boards (which use OEI - iMX943, iMX95, iMX952 etc.) support saving\n\nboards or SoCs ? I think SoCs ?\n\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\nSoCs or SoC revisions ?\n\n[...]\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\nIt would be good to have a way to instruct QB to save the data into \nbackup location.","headers":{"Return-Path":"","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 secure) header.d=mailbox.org header.i=@mailbox.org header.a=rsa-sha256\n header.s=mail20150812 header.b=S9UwqaP4;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","X-MBO-RS-META":"scmq4bh7nje88f1j481whg5etbo4fwog","X-MBO-RS-ID":"197a052279d622b3643","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3673429,"web_url":"http://patchwork.ozlabs.org/comment/3673429/","msgid":"","list_archive_url":null,"date":"2026-04-04T11:46:38","subject":"Re: [PATCH v3 5/6] doc: board: nxp: Add Quickboot documentation","submitter":{"id":6978,"url":"http://patchwork.ozlabs.org/api/people/6978/","name":"Fabio Estevam","email":"festevam@gmail.com"},"content":"On Thu, Apr 2, 2026 at 6:29 AM Simona Toaca (OSS)\n wrote:\n\n> diff --git a/doc/board/nxp/index.rst b/doc/board/nxp/index.rst\n> index 8cd24aecf33..53ef220d989 100644\n> --- a/doc/board/nxp/index.rst\n> +++ b/doc/board/nxp/index.rst\n> @@ -30,3 +30,4 @@ NXP Semiconductors\n> mx6ullevk\n> rproc\n> psb\n> + qb\n\n'qb' is too cryptic. Please spell it as 'Quickboot'\n\n> diff --git a/doc/board/nxp/qb.rst b/doc/board/nxp/qb.rst\n\nSame here: quickboot.rst\n\n> new file mode 100644\n> index 00000000000..07953a1b7e9\n> --- /dev/null\n> +++ b/doc/board/nxp/qb.rst\n> @@ -0,0 +1,54 @@\n> +.. 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\ns/boards/SoCs\n\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\nPlease use 'Quickboot' for consistency and clarity throughout this document.","headers":{"Return-Path":"","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=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=Ri8zdFLE;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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Sat, 04 Apr 2026\n 04:46:50 -0700 (PDT)","MIME-Version":"1.0","References":"\n ","In-Reply-To":"\n ","From":"Fabio Estevam ","Date":"Sat, 4 Apr 2026 08:46:38 -0300","X-Gm-Features":"AQROBzAXZGP2iJhrH5aagxAgLJnnuE5c3tGp_VJEUvR4_xT4e77mZFrTWJrLJ8c","Message-ID":"\n ","Subject":"Re: [PATCH v3 5/6] doc: board: nxp: Add Quickboot documentation","To":"\"Simona Toaca (OSS)\" ","Cc":"uboot-imx@nxp.com, u-boot@lists.denx.de,\n Stefano Babic , peng.fan@nxp.com, alice.guo@nxp.com,\n viorel.suman@nxp.com, simona.toaca@nxp.com, ye.li@nxp.com, ping.bai@nxp.com,\n marex@nabladev.com, 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","Content-Type":"text/plain; charset=\"UTF-8\"","Content-Transfer-Encoding":"quoted-printable","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}}]