USB boot support?

[lohriialo]

I've updated my rpi4 firmware to the latest stable(June 15th) which now has official support for USB boot. I'm able to USB boot Raspberry Pi OS for example but when I attempt to boot android-rpi, I can see that rainbow screen but it boot loop. Any help/pointers on how to get it to work?

[AaronDewes]

Try to use this as fstab.rpi4 and rebuild:

#<src>                  <mnt_point>         <type>    <mnt_flags and options>                               <fs_mgr_flags>

/dev/block/sda2    /system             ext4      ro,barrier=1                                          wait,first_stage_mount
/dev/block/sda3    /vendor             ext4      ro,barrier=1                                          wait,first_stage_mount
/dev/block/sda4    /data               ext4      noatime,nosuid,nodev,nomblk_io_submit,errors=panic    wait

[lohriialo]

@AaronDewes thanks, works perfectly with USB boot but won't boot in sdcard mode, not sure if there's a good way to have both at the same time

[AaronDewes]

Please try this fstab:

#<src>                         <mnt_point>         <type>    <mnt_flags and options>                                <fs_mgr_flags>

/dev/block/by-name/system       /system             ext4      ro,barrier=1                                          wait,first_stage_mount
/dev/block/by-name/vendor       /vendor             ext4      ro,barrier=1                                          wait,first_stage_mount
/dev/block/by-name/userdata      /data              ext4      noatime,nosuid,nodev,nomblk_io_submit,errors=panic    wait,first_stage_mount

This may result in a bootloop, but please try it. If it does, run find /dev with adb shell on an older build. Please make sure the partition names are correct, this detects them by names.

[AaronDewes]

@lohriialo Any progress?

[lohriialo]

I haven't had a chance to rebuild and test it yet, for now I'm sticking with USB boot as I already have some other stuffs going on in the current build

[Road-Drum]

@AaronDewes I could probably test this. Just patch the fstab in latest arpi-10 source right?

[AaronDewes]

Yes, Thank you!

[Road-Drum]

I'll try building tonight, natively compile on my pi 4 lol

[AaronDewes]

I don't think that will work, android uses x64 prebuilts while building

[Road-Drum]

I don't think that will work, android uses x64 prebuilts while building

could I override those prebuilts and recompile them from scratch? I recall there's an option to not use prebuilts and compile from scratch

[AaronDewes]

I think you can, but I don't know.

[Road-Drum]

so far the current script is to build arm and on my Pi 4, it's currently running Manjaro ARM which I need to get gcc-arm since Manjaro ARM is shipped with arm64 arch by default. I'm just toying around so I won't delve too deep, but ARCH=arm make zImage partially successful since gcc-arm64 doesn't recognize some gcc-arm specific options

maybe I'll have more success on RPi OS, will try to spin a kvm or lxd to run arm version of that, though I'm not sure how to setup kvm that targets arm. is it armhf or armv7l-neon? arm architecture is kinda messed up imo lol

[AaronDewes]

I don't know.

[AaronDewes]

I've tried building this on my RPi, while building android, my sd card broke because it used it too much. It also required 16GB of RAM, so I had to use swap.

[lohriialo]

USB boot works as suggested above by @AaronDewes

[Road-Drum]

Does it works both for sd card and USB? If then you should consider pull request for the fstab on android-rpi device repo as well

On Fri, 18 Sep 2020, 14:10 Lohrii Alo, notifications@github.com wrote:

USB boot works as suggested above by @AaronDewes https://github.com/AaronDewes

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[lohriialo]

No, it doesn't work both ways, I guess it has to be either SdCard or USB