Received-SPF: pass (google.com: domain of linux-kernel+bounces-196637-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3;
Message-ID: <36642bd8-c981-4190-9f44-072ac3c97c6b@gmx.net>
Date: Fri, 31 May 2024 12:00:07 +0200
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v5 0/4] Add minimal boot support for Raspberry Pi 5
To: Andrea della Porta <andrea.porta@suse.com>, Rob Herring
 <robh@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>,
 Florian Fainelli <florian.fainelli@broadcom.com>, Ray Jui
 <rjui@broadcom.com>, Scott Branden <sbranden@broadcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@broadcom.com>, Ulf Hansson
 <ulf.hansson@linaro.org>, Adrian Hunter <adrian.hunter@intel.com>,
 Kamal Dasu <kamal.dasu@broadcom.com>, Al Cooper <alcooperx@gmail.com>,
 devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org,
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
 linux-mmc@vger.kernel.org
References: <cover.1717061147.git.andrea.porta@suse.com>
Content-Language: en-US
From: Stefan Wahren <wahrenst@gmx.net>
In-Reply-To: <cover.1717061147.git.andrea.porta@suse.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
UI-OutboundReport: notjunk:1;M01:P0:2aASMyPySck=;cYE8SQEXYO6YSrrCHXAMmcampT4
 eEw2/zrBMA7oAeTdxF6JThFFGVzhtgSS5LEtbRsHbXSpvnTZM5bOA4FSEFRzaAN2jjuUYp06M
 mHdZoXq3ERumQcJHouZugNYY1RaKE6cZo8EQClzDdg712I6ymYtrRZWxdsMRaiFXrOyMX4GAk
 i0lhwWfd7hLSG9NbTqOR++z+TCfKCFb5x/Z8pb/dd9AnuCxjU6EvkiGij4jbHzzuR61OX503M
 SBbgUbwhwjeqIa8iyNweqZHCKlG+EiWrur/vyIT6FZKHT7Sr1GoBAThm5oQ4EKr3ax7GhF4mR
 /CrMYM7J/ozCF8BGjWKjR4DqEcn2W0iAcsc6NMdhSEOE3id2lQxl4KnOXgXoBK69n8YLggDqR
 diHf05aOQt1EUcZ3+Bdnf+++suqeJQYK2hdstduzQrQhRTtiSVeSDXdj/Kyrddz7NyqBOboyP
 xz64yHm+j0PVTaP0sfmVIIdUWY5RmDj0QcWYXyDXiOQhc8CBGFrmWponv/Mx+gcwfdeZsoYIW
 BBHsReMIxV5R5XywUjlHMXCQnYK8hFBmN+xwd5R1yUs4yl37jp2e28UhCc7vf3G1c5kaMZMnQ
 We+7Rwa0ruyQPeCBfsgA2UjbYyVmBl8isCQxRU2JPgEws5tvh12SL76PR/qcp7TZxk5EKjD2n
 REU6yjP/AUoot/2LjsLryq197AuJsi1LAS6uazyN6KY6YDIFtcMmlyVlzhZF08akiI30NCPqg
 m33adAzpk8cWNq13pNNK0SF3UWo9r5uN3ew4qU8ahh8XvCdamBFLBK2xbUpCMYXkUQXP03DUp
 53Ul7kflx8f0fPh8spd0PC/IwWoCnQnzvbFBR8C14fgek=

Hi Andrea,

Am 30.05.24 um 12:11 schrieb Andrea della Porta:
> Hi,
>
> This patchset adds minimal support for the Broadcom BCM2712 SoC and for
> the on-board SDHCI controller on Broadcom BCM2712 in order to make it
> possible to boot (particularly) a Raspberry Pi 5 from SD card and get a
> console through uart.
> Changes to arm64/defconfig are not needed since the actual options work
> as they are.
> This work is heavily based on downstream contributions.
>
> Tested on Tumbleweed substituting the stock kernel with upstream one,
> either chainloading uboot+grub+kernel or directly booting the kernel
> from 1st stage bootloader. Steps to reproduce:
> - prepare an SD card from a Raspberry enabled raw image, mount the first
>    FAT partition.
> - make sure the FAT partition is big enough to contain the kernel,
>    anything bigger than 64Mb is usually enough, depending on your kernel
>    config options.
> - build the kernel and dtbs making sure that the support for your root
>    fs type is compiled as builtin.
> - copy the kernel image in your FAT partition overwriting the older one
>    (e.g. kernel*.img for Raspberry Pi OS or u-boot.bin for Tumbleweed).
> - copy arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dtb on FAT partition.
> - make sure you have a cmdline.txt file in FAT partition with the
>    following content:
>    # cat /boot/efi/cmdline.txt
>    root=/dev/mmcblk0p3 rootwait rw console=tty ignore_loglevel earlycon
>    console=ttyAMA10,115200
> - if you experience random SD issues during boot, try to set
>    initial_turbo=0 in config.txt.
was this an issue since the beginning of this series?

What kind of SD issues?

Is there a downstream reference?