[{"id":3678696,"web_url":"http://patchwork.ozlabs.org/comment/3678696/","msgid":"","list_archive_url":null,"date":"2026-04-17T12:15:43","subject":"Re: [PATCH v3 0/7] Add FIT multi-DTB selection for Qualcomm platforms","submitter":{"id":710,"url":"http://patchwork.ozlabs.org/api/people/710/","name":"Jan Kiszka","email":"jan.kiszka@siemens.com"},"content":"On 17.04.26 14:09, Aswin Murugan wrote:\n> This series adds dynamic device tree selection from FIT images for\n> Qualcomm Snapdragon platforms, enabling U-Boot to select the\n> appropriate DTB based on hardware parameters detected from SMEM.\n> \n> Qualcomm fit based DTB format is documented in [1]\n> The fit image contains only DTB, while the kernel will be part of UKI image.\n> \n\nI suppose you know that UKIs (systemd-boot, EFI Boot Guard) provide DTB\nselection as well. However, that is a fix-up for the case the firmware\ndoes not provide a fitting DTB. This here is supposed to support the\nfirmware DTB delivery, correct?\n\nJan","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=siemens.com header.i=@siemens.com header.a=rsa-sha256\n header.s=selector2 header.b=VdTXI5NI;\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; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=reject dis=none) header.from=siemens.com","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=siemens.com header.i=@siemens.com header.b=\"VdTXI5NI\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=reject dis=none) header.from=siemens.com","phobos.denx.de;\n spf=pass smtp.mailfrom=jan.kiszka@siemens.com","dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=siemens.com;"],"Received":["from phobos.denx.de (phobos.denx.de [85.214.62.61])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fxv406R6Xz1yCv\n\tfor ; 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SMEM cache infrastructure: Provides cached access to commonly\n> used SMEM data (socinfo, RAM partitions) to avoid redundant\n> lookups during boot. Includes socinfo header from Linux kernel\n> for SoC identification.\n> \n> 2. FIT multi-DTB selection: Implements the core selection logic\n> that reads hardware parameters from SMEM, parses metadata DTB,\n> matches FIT configurations, and loads the selected DTB with\n> overlays. Integrates with EFI boot flow by setting fdt_addr.\n> \n> 3. mkimage: add fatfs image type for FAT partition images\n> Added fatimage.c handler that uses mkfs.vfat and mcopy to create\n> FAT images from a directory.\n\nI'm unsure why part 3 here is appropriate for U-Boot. 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