VoLTE Implementation For Google Pixel 3a/3a XL

atarilinux

Thanks! This is a great post! Very helpful!

atarilinux

I added Sudo to the Apt statements in .gitlab-ci.yml. I also added systempart=/dev/mapper/system to the deviceinfo file.

For this part,
https://lucaweiss.eu/post/2023-03-30-retrofit-dynamic-partition/

I'm trying to figure out where to add this on github. The code on github is referencing a number of other githubs by "clone." I'm trying to untangle it to get a since of what happens when and where. I want to make sure I'm not missing anything.

JayH

@atarilinux said in VoLTE Implementation For Google Pixel 3a/3a XL:

@Eric-H

What you have stated above is correct to the best of my knowledge. Here is the other part from the QA call:

*Source Material - Not Image
*Information on image build process, but not how to install it
*Built on top of latest Android 12.1 version for the Google Pixel 3a, but build not completed

So....it looks like we need to:

Finish the build (This part is the least specific. Finish what? This is the main issue due to it not being specific. Maybe it is only the retro-fitted partition issue? A lot of data may need to be checked to see what is complete. Here is the bottleneck in completing development.)
...snip...

I think this, at the very least, is what you're running into. For one thing, the LLVMgold library isn't referenced correctly by the build system. I was able to correct that but my make skills are simplistic and old and rusty. Am currently looking at a problem with the device tree.

atarilinux

@JayH

Yes, that is where I am stuck. I need to know what exactly is missing to complete the build. It's my first port, and I'm new to this. The port does reference other code via clone statements, so I have to look at that too. There are no comments that I am finding that tells me what does what. It will take me a while to figure out what each thing does and what goes where and when. I'm comparing other ports and reading some documentation, but it will be slow going on my own unfortunately.

mr_growl

Don't suppose anyone has the vendor blobs for android 12.1/lineage 19.1 extracted already? I'm trying a build myself and it's at the point where it wants them but I've been struggling a bit to extract them from the payload image I have. Checked the muppet but they don't have 19.1 .

atarilinux

@mr_growl

Sounds like a good idea! Keep us posted how the build goes and if you need anything! I did find this online during my research. Would this help?

https://github.com/propgsp/Android-Tools

JayH

@mr_growl I would think since the vendor blobs are device specific that they wouldn't change from OS-to-OS ??

mr_growl

@JayH I was presuming they'd be specific to the kernel they were built for. But I'm new to that

@atarilinux Thanks for the link. I'll give those a try next time I'm working at it (been too busy lately)

atarilinux

@mr_growl

I completely understand. It has been hectic this way too. I hope I can get some more time to look at this soon! I hope what I sent can be of some use.

atarilinux

@JayH @mr_growl

I also found this UBPorts video from 6 years ago. It shows how to build a port. Some things probably have changed a bit since then, but it should assist in providing a visual for the Porting Documentation.

https://m.youtube.com/watch?v=nShXVDXM50A

mr_growl

I had a go with doing a build this weekend and it seems to have built something (I have a boot.img, rootfs.img and system.img).

So now trying to sort out the phone to get it ready to try flashing. I checked my /data partition and it is mounted from dm-4 and is not ext4 (instructions say /data should not be encrypted and should be ext4). So just trying to sort that out. Any advice on setting up the partitions in preparation to flash would be appreciated

arubislander

@mr_growl As I understand it, just that /data should be ext4. There is no need for repartitioning if the correct stock ROM was installed beforehand.

mr_growl

@arubislander Thanks! I flashed android 12.1 to it, so I'll just try reformatting that partition as ext4.

atarilinux

@mr_growl

That's great news! Keep us posted how everything goes! Fingers crossed everything works correctly!

mr_growl

Did first attempt at flashing. This is on pixel 3a XL:

flash last stock firmware (android 12.1)
install twrp
boot into twrp and open terminal
umount /dev/block/dm-4 (which was mounted to /data and /sdcard)
mke2fs -t ext4 /dev/block/dm-4
mount /dev/block/dm-4 /data
mount /dev/block/dm-4/sdcard
boot into bootloader
flasboot flash boot boot.img
attempt to reboot into recovery

At this point the device wouldn't boot into recovery. So I'm flashing twrp back on to it.

Any thoughts?

Here's the repo I'm using: https://gitlab.com/mr-growl/ubports-ubuntu-touch-google-bonito-volte
I'm building in a ubuntu server 20.04 vm. I modified the deviceinfo from atarilinux's version slightly which got it building properly for me.

mr_growl

While I was re-flashing twrp a thought occurred. With TWRP on the pixel 3a (compared to the nexus 5 and 4 which I used to use) I have to boot it using "fastboot boot twrp.img" and then use the "flash current twrp" option (taken from the lineage install instructions)... on the older phones it was "fastboot flash recovery twrp.img". Which makes me think this twrp might be writing to the same place as boot.img when I do the "fastboot flash boot boot.img". Any thoughts on that?

ikoz

@mr_growl Why don't you formtat through the built it in option in TWRP or even better via fastboot: fastboot format:ext4 userdata? (the partition name may differ)

Also, when the block device shows up as dm-something it is encrypted.

mr_growl

@ikoz Thanks! I'll give that a go (I'm still new to a lot of this).

I was thinking it was encrypted. Seems to me that encryption is on by default in android 12 / lineage 19.1 and there isn't an option to disable it in the interface. Not sure what to do from this point.

ikoz

@mr_growl If you disable requiring password to login (just swipe to unlock), it will also disable encryption.

But just running the fastboot command will work (if it throws any error, it likely means your fastboot build is broken and you'll have to use the official one from Google).

atarilinux

@mr_growl

I might be off here, but did you use fastbootd? The Google Pixel 3a has retrofitted dynamic partitons in Android 12.1.

https://source.android.com/docs/core/architecture/bootloader/fastbootd

Info on Retrofitted Dynamic Partitions:
https://lucaweiss.eu/post/2023-03-30-retrofit-dynamic-partition/