Re: [DistroKit] [PATCH v2 0/4] enable uploading kernel, dtb and initramfs over fastboot and boot it on Rock3A

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

On 09.06.23 12:28, Johannes Zink wrote:
> This series enables building Android sparse images of kernel, dtb and
> initramfs for the Radxa Rock3A, enables mounting corresponding ram-files
> as fastboot partitions in the barebox fastboot gadget, and adds support
> for booting the image uploaded via fastboot.
> 
> This can be useful in situations, where booting a Linux system is
> required on such target without touching the nonvolatile storage, e.g.
> for debugging purposes.
> 
> For uploading kernel, dtb and initramfs use
> 
> fastboot flash ram-kernel    platform-v8a/images/linuximage -S 1
> fastboot flash ram-oftree    platform-v8a/images/rk3568-rock-3a.dtb -S 1
> fastboot flash ram-initramfs platform-v8a/images/initramfs-sparse.img -S 1

Did you find out why -S 1 is needed instead of relying on automatic sparsing?

> then for booting either use the barebox command
> 
> boot ram-fastboot
> 
> or pass the bootcommand over fastboot from the host via
> 
> fastboot oem exec boot ram-fastboot
> 
> Best regards
> Johannes
> 
> To: distrokit@pengutronix.de
> Cc: patchwork-jzi@pengutronix.de
> 
> Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
> ---
> Changes in v2:
> - worked in feedback from Ahmad, Jan and Robert (off-list). Thanks for
>   your review and feedback!
>   - only support zstd compressed initramfs, drop support for gzip (image
>     generation and kernel config)
>   - drop generation of android-sparse images. Use -S 1 parameter on
>     fastboot command instead to avoid cut-off issues
>   - export mmc{0,1,2} as optional partitions with generic names now,
>     add init script to detect these partitions on boot
>   - rename fastboot partitions {kernel,initramfs,oftree} to
>     ram-{kernel,initramfs,oftree} to make their non-permanent state more
>     obvious
>   - change name of fastboot boot script to ram-fastboot for the same
>     reason
>   - remove unneeded root=/dev/ram from kernel cmdline for the
>     ram-fastboot target
>   - update commit messages and cover-letter accordingly
> - Link to v1: https://lore.distrokit.org/20230606-default_enable_fastboot_rock3a-v1-0-42195d538df2@pengutronix.de
> 
> ---
> Johannes Zink (4):
>       v8a: enable initrd generation
>       v8a: kernel: enable initramfs in kernel config
>       v8a: barebox: enable loading kernel, dtb and initrd via fastboot
>       v8a: barebox: add a boot target for fastboot loaded image files
> 
>  .../barebox-common-defaultenv/boot/ram-fastboot           |  7 +++++++
>  .../barebox-common-defaultenv/init/detect-mmcs            |  3 +++
>  .../barebox-common-defaultenv/nv/fastboot.acm             |  1 +
>  .../barebox-common-defaultenv/nv/fastboot.bbu             |  1 +
>  .../barebox-common-defaultenv/nv/fastboot.partitions      |  1 +
>  .../barebox-common-defaultenv/nv/usbgadget.autostart      |  1 +
>  configs/platform-v8a/kernelconfig                         | 15 ++++++++++++---
>  configs/platform-v8a/platformconfig                       | 12 +++++++++++-
>  8 files changed, 37 insertions(+), 4 deletions(-)
> ---
> base-commit: 282b5aff9aecf141de5040f896a9a10081596350
> change-id: 20230606-default_enable_fastboot_rock3a-3223c6b01647
> 
> Best regards,

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