[DEV][G925F] CyanogenMod 12.1 Development

[mythos234]

Hello there, it's time to get this rolling somewhere.

This is a Development-Thread. Please don't post if you aren't a developer.


What this IS
This is a Development thread, a platform for developers to discuss the development of CyanogenMod for the G925F. It's made so that we can get this working, fix up the problems - because there will be severe ones - and achieve a working official Rom at some point.
At the moment it's @OldDroid and me with help, but it would be awesome if interested devs would join in so that we can make this a team effort.
In short, it's a Dev-Thread in a dev section.
Right now it doesn't work and I'm not sure that it will work.

What this IS NOT
This is NOT a working Rom. Not even close. I can only link you to the kernel repo and soon to device and vendor, as they are almost completed for a first try.
And yes, there is no download link for the Rom. Because there isn't anything you could download yet.
This is also NOT intended as a Q&A thread. Please don't ask if your variant will be supported, I will respond by trolling. Firstand only priority is to get this running, then we'll talk about variants.
And ETA is an evil word with no meaning here. I work slowly, deal with it

Where are we currently?
Much further than a day ago
Thanks to @OldDroid, we've teamed up
All the links you want (minus the download link :angel
device: (soon, almost complete)
https://gitlab.com/mythos234/device_samsung_zeroltexx
vendor:
https://gitlab.com/mythos234/vendor_samsung_zerolte
kernel:
https://gitlab.com/mythos234/zerolte-kernel-CM

Once available, buggy alpha builds will be posted here
///
vendor and device will soon be pushed to my github

​

 

[mythos234]

Reserved

 

[OldDroid]

i'll join you ... also started working on cm12.1 for s6 edge 5 days ago (currently in england with my school class)

 

[mythos234]

vendor is setup

i'll join you ... also started working on cm12.1 for s6 edge 5 days ago (currently in england with my school class)

Welcome aboard then

vendor is finally setup and good to go!

https://github.com/mythos234/vendor_samsung_zerolte
It's apparently not without some minor casualties, but we got it. Huge thanks to @RaymanFX, he's helping me, since I'm not that much into CM building yet and I'm also basing this project on his CM for the N910C, which's 5433 is darn similar to our 7420, so we got a pretty good base to begin with.

 

[OldDroid]

add me as participant to the repos ^^
https://github.com/OldDroid

 

[mythos234]

add me as participant to the repos ^^
https://github.com/OldDroid

Done for all the 3 of them

 

[mythos234]

Looks like I killed Bluetooth for now (lol). Other than that it's slow but steady progress.

 

[nasko_spasko]

Looks like I killed Bluetooth for now (lol). Other than that it's slow but steady progress.

What do you mean "killed"? Killed the chip or wiped the MAC addr. or something?

 

[mythos234]

What do you mean "killed"? Killed the chip or wiped the MAC addr. or something?

I'm currently building the Rom with completely removed Bluetooth support

 

[mythos234]

First Build is compiled and ready for a test.. But I can't install the zip. This would be hillarious if it wasn't so annoying

 

[mythos234]

Besides I said it can't be installed Hard to test something you can't even install

I think that there was a mistake in the partition sizes.. /system was declared as 4.1GB, but it's only 3.6GB. Recompiling with a new value, should be able to flash it then

 

[Aircondition]

Good luck develop without documentation for exynos chipset.

But can you tell us more in details how porting works and what are the challenges with it.
Is it hard to develop a rom without samsung binary files and drivers? I know they are proprietary and closed soruce.

If just Samsung could be more developer friendly like Sony.
We can request source for closed binaries here, http://opensource.samsung.com/reception/receptionSub.do?method=inquiryView, most likely they wont answer

 

[mythos234]

Good luck develop without documentation for exynos chipset.

The lack of drivers makes this a fun exercise almost Where's be the challenge if everything was easy...?

 

[mythos234]

Good luck develop without documentation for exynos chipset.

But can you tell us more in details how porting works and what are the challenges with it.
Is it hard to develop a rom without samsung binary files and drivers? I know they are proprietary and closed soruce.

If just Samsung could be more developer friendly like Sony.
We can request source for closed binaries here, http://opensource.samsung.com/reception/receptionSub.do?method=inquiryView, most likely they wont answer

I can't say what the challenges here will be, since I couldn't manage to even flash it yet - Second build is compiling since hours now. For now it's using all the proprietrary stuff we managed to grab and some additional stuff from the 5433 CM. But without booting it's hard to tell what won't work and might present a challenge ^^ From what I saw it'll be tough to just get the modem running. The hard part is to write the drivers yourself

 

[lch920619x]

I can't say what the challenges here will be, since I couldn't manage to even flash it yet - Second build is compiling since hours now. For now it's using all the proprietrary stuff we managed to grab and some additional stuff from the 5433 CM. But without booting it's hard to tell what won't work and might present a challenge ^^ From what I saw it'll be tough to just get the modem running. The hard part is to write the drivers yourself

It's interesting that you can use drivers from 5433, which is a 32bit platform. Most drivers are not compatible when you switch from 32bit to 64bit if I am right?

Sent from my SM-G920F using Tapatalk

 

[mythos234]

It's interesting that you can use drivers from 5433, which is a 32bit platform. Most drivers are not compatible when you switch from 32bit to 64bit if I am right?

Sent from my SM-G920F using Tapatalk

As a base to know how to do it, obviously we can't just use drivers for a different chipset

 

[mythos234]

Updated the /system size in the BoardConfig and at least it flashes. But it doesn't want to boot for some reason yet.

 

[-Mr. X-]

Updated the /system size in the BoardConfig and at least it flashes. But it doesn't want to boot for some reason yet.

If you have the 5.1.1 boot loader and are using 5.0.2 as a base. Sboot will not boot it. As a fyi. It checks Linux versions.

 

[mythos234]

If you have the 5.1.1 boot loader and are using 5.0.2 as a base. Sboot will not boot it. As a fyi. It checks Linux versions.

Both is 5.1.1 and Sboot seems to clear the boot as well, everything seems to go fine, it just doesn't boot. :/ Trying with building the kernel during the build itself instead of using a prebuilt one and see how that goes

 

[-Mr. X-]

Both is 5.1.1 and Sboot seems to clear the boot as well, everything seems to go fine, it just doesn't boot. :/ Trying with building the kernel during the build itself instead of using a prebuilt one and see how that goes

I would personally flash an Engineering boot loader while doing this, to ensure version checking is not the issue.