Database Develop

[Q] Xperia SP Device Tree/ Proprietary Blobs

Hey guys,
I know the dev scene is pretty bleak here. I already had the android 4.3 jellybean source code synced on my laptop, since I was creating builds for my Nexus.
I tried for the SP, but then I realized that there is no device tree present. I found one by Krabappel but it was incomplete (or atleast I think so). It refers to 2 other extract-files.sh, but for the life of me I can't figure out which ones.
I know there are a few devs here, so can one of them help me out here? How to I get the blobs for the phone?
If I get that going, we can start with an AOSP build and then keep adding stuff to it.
Let me know. \
Cheers! :good:

sarkar1990 said:
Hey guys,
I know the dev scene is pretty bleak here. I already had the android 4.3 jellybean source code synced on my laptop, since I was creating builds for my Nexus.
I tried for the SP, but then I realized that there is no device tree present. I found one by Krabappel but it was incomplete (or atleast I think so). It refers to 2 other extract-files.sh, but for the life of me I can't figure out which ones.
I know there are a few devs here, so can one of them help me out here? How to I get the blobs for the phone?
If I get that going, we can start with an AOSP build and then keep adding stuff to it.
Let me know. \
Cheers! :good:
Click to expand...
Click to collapse
I tried building cm10.1 for the sp, but could not get past the kernel logo. Even the recovery didn't work.
If you want the blobs, I can upload them somewhere. I had extracted them from the current 4.1.2 implementation on the device.

the extract-files.sh are in the below repo
"repository": "android_device_sony_common",
"target_path": "device/sony/common"
I have tried to build the recoveryimage but I am getting problem in builting kernel.elf as normally it is in kernel.img
I have tried to both method building kernel and using zImage.

nil1511 said:
the extract-files.sh are in the below repo
"repository": "android_device_sony_common",
"target_path": "device/sony/common"
I have tried to build the recoveryimage but I am getting problem in builting kernel.elf as normally it is in kernel.img
I have tried to both method building kernel and using zImage.
Click to expand...
Click to collapse
Did you try to convert the zimage to elf using the build tools?
Here's the link that you may try http://forum.xda-developers.com/showpost.php?p=43356450&postcount=2

eeehaw said:
I tried building cm10.1 for the sp, but could not get past the kernel logo. Even the recovery didn't work.
If you want the blobs, I can upload them somewhere. I had extracted them from the current 4.1.2 implementation on the device.
Click to expand...
Click to collapse
Awesome. You can either upload them link me the git if its there

sarkar1990 said:
Did you try to convert the zimage to elf using the build tools?
Here's the link that you may try http://forum.xda-developers.com/showpost.php?p=43356450&postcount=2
Click to expand...
Click to collapse
I mean that i tried to make write device files from scratch
as given here
[link]http://wiki.cyanogenmod.org/w/Doc:_porting_intro[/link]
as on method 3 i tried using zImage as kernel as stated there.
but make recoveryimage fails

nil1511 said:
I mean that i tried to make write device files from scratch
as given here
[link]http://wiki.cyanogenmod.org/w/Doc:_porting_intro[/link]
as on method 3 i tried using zImage as kernel as stated there.
but make recoveryimage fails
Click to expand...
Click to collapse
If you want to learn. It would be best to clone the Doomlord git and then read the files and scripts that are present there. This will give you the knowledge you may need to proceed further.
the git for our processor msm8960t is already present on github. Also download the kernel sources and drivers provided by Sony themselves from their developerworld page

sarkar1990 said:
the git for our processor msm8960t is already present on github.
Click to expand...
Click to collapse
You mean the kernel sources or the cm / aosp sources ? Can you provide a link.

eeehaw said:
You mean the kernel sources or the cm / aosp sources ? Can you provide a link.
Click to expand...
Click to collapse
Here is the link
https://github.com/DooMLoRD/android_kernel_sony_msm8960t.git

eeehaw said:
I tried building cm10.1 for the sp, but could not get past the kernel logo. Even the recovery didn't work.
If you want the blobs, I can upload them somewhere. I had extracted them from the current 4.1.2 implementation on the device.
Click to expand...
Click to collapse
I am using the device tree: https://github.com/Krabappel2548/android_device_sony_huashan
I added CPU_TARGET_VARIANT according to JB 4.3 requirements. And loaded up the required gits.
But the thing is now I get an error:
Code:
Code:
make: *** No rule to make target `device/sony/huashan/zImage', needed by `out/target/product/huashan/kernel'. Stop.
Could you help me out a bit?

I recall CM10.1 needing a kernel build from scratch, along with building the ROM
"你看到了没? 爱让我流胆怯的泪..."
"Have you seen it? Love has made me cry cowardly tears..."

sarkar1990 said:
I am using the device tree: https://github.com/Krabappel2548/android_device_sony_huashan
I added CPU_TARGET_VARIANT according to JB 4.3 requirements. And loaded up the required gits.
But the thing is now I get an error:
Code:
Code:
make: *** No rule to make target `device/sony/huashan/zImage', needed by `out/target/product/huashan/kernel'. Stop.
Could you help me out a bit?
Click to expand...
Click to collapse
I did not use krabappel's device files. I had based my stuff on the Xperia T. I'll try this probably tonight.

eeehaw said:
I did not use krabappel's device files. I had based my stuff on the Xperia T. I'll try this probably tonight.
Click to expand...
Click to collapse
Can you push your device file on github

nil1511 said:
Can you push your device file on github
Click to expand...
Click to collapse
I'm behind a very nasty proxy which makes it super hard to push/pull files from github. Instead of pulling i just download the zip archives.
I'll check out ways to push files though.

eeehaw said:
I'm behind a very nasty proxy which makes it super hard to push/pull files from github. Instead of pulling i just download the zip archives.
I'll check out ways to push files though.
Click to expand...
Click to collapse
Man, I keep running into the error! Ahh.. I think we need a better device tree.

sarkar1990 said:
Man, I keep running into the error! Ahh.. I think we need a better device tree.
Click to expand...
Click to collapse
Try getting the yuga tree, and change yuga to huashan, and fusion3 to viskan wherever possible.
This should not be straightforward. You will have to make some tweaks also.
That *might* work.
CallMeVentus said:
I recall CM10.1 needing a kernel build from scratch, along with building the ROM
"你看到了没? 爱让我流胆怯的泪..."
"Have you seen it? Love has made me cry cowardly tears..."
Click to expand...
Click to collapse
You mean coping the kernel sources files to kernel/sony/huashan right ? I did the same thing.

eeehaw said:
Try getting the yuga tree, and change yuga to huashan, and fusion3 to viskan wherever possible.
This should not be straightforward. You will have to make some tweaks also.
That *might* work.
You mean coping the kernel sources files to kernel/sony/huashan right ? I did the same thing.
Click to expand...
Click to collapse
Hmm....and did you define the kernel building path in the boardconfig.mk?
"你看到了没? 爱让我流胆怯的泪..."
"Have you seen it? Love has made me cry cowardly tears..."

CallMeVentus said:
Hmm....and did you define the kernel building path in the boardconfig.mk?
"你看到了没? 爱让我流胆怯的泪..."
"Have you seen it? Love has made me cry cowardly tears..."
Click to expand...
Click to collapse
yes. The kernel was getting built. I was able to see a boot logo on the screen. FreeXperia/Sony logo in this case. And then it would hang. Once I got a bootloop. I was messing around with the ramdisk to see if any hacks get it working.

eeehaw said:
yes. The kernel was getting built. I was able to see a boot logo on the screen. FreeXperia/Sony logo in this case. And then it would hang. Once I got a bootloop. I was messing around with the ramdisk to see if any hacks get it working.
Click to expand...
Click to collapse
Did you implement the changes needed for a CM kernel from its stock sources? I'm not sure of the changes, though. Each kernel differs.
"你看到了没? 爱让我流胆怯的泪..."
"Have you seen it? Love has made me cry cowardly tears..."

CallMeVentus said:
Did you implement the changes needed for a CM kernel from its stock sources? I'm not sure of the changes, though. Each kernel differs.
"你看到了没? 爱让我流胆怯的泪..."
"Have you seen it? Love has made me cry cowardly tears..."
Click to expand...
Click to collapse
No. I knew there were changes but I never knew what they were ? I asked a few people in a few threads but was not able to decipher.
Do you have any idea what sort of changes are required. ?

Adding multi-window support to your Omni build

Since this has been asked a few times
Multi windows support is not in by default
You need to cherry-pick this to include it in your build
https://gerrit.omnirom.org/#/c/53/

thank you,
I added it into my p5110 build, i'll let you know if it works well.
edit:: working well

I won't lie, I plan to build Omni today as my first-ever Android build. It may go hilariously badly, it may go wonderfully. Is it in the command line that I cherry-pick that piece of code? The rest I think I can figure out myself. Thanks in advance.

dibblebill said:
Is it in the command line that I cherry-pick that piece of code?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showpost.php?p=37053013&postcount=7

chasmodo said:
http://forum.xda-developers.com/showpost.php?p=37053013&postcount=7
Click to expand...
Click to collapse
You probably will want to do a "repo start" first, otherwise your commit will be clobbered on sync.
e.g. from the root of the source tree:
Code:
repo start work frameworks/base
for more on repo - http://source.android.com/source/using-repo.html

Thank you both. Very helpful. It's wonderful receiving help from the developers, especially since this will be my first build
Sent from my Nexus 10

dibblebill said:
Thank you both. Very helpful. It's wonderful receiving help from the developers, especially since this will be my first build
Sent from my Nexus 10
Click to expand...
Click to collapse
For everybody there was a "first time"

chasmodo said:
http://forum.xda-developers.com/showpost.php?p=37053013&postcount=7
Click to expand...
Click to collapse
When I execute this using the linked cherry pick, all I get is "fatal: Not a git repository (or any of the parent directories): .git

dibblebill said:
When I execute this using the linked cherry pick, all I get is "fatal: Not a git repository (or any of the parent directories): .git
Click to expand...
Click to collapse
you tried this mate?
Code:
git fetch [url]https://gerrit.omnirom.org/android_frameworks_base[/url] refs/changes/53/53/19 && git cherry-pick FETCH_HEAD
before that u must be inside ~/android/omni/frameworks/base if i im rigth, u get there by
Code:
cd ~/android/omni/frameworks/base
someone correct me if im wrong pls.

makkeonmies said:
you tried this mate?
Code:
git fetch [url]https://gerrit.omnirom.org/android_frameworks_base[/url] refs/changes/53/53/19 && git cherry-pick FETCH_HEAD
before that u must be inside ~/android/omni/frameworks/base if i im rigth, u get there by
Code:
cd ~/android/omni/frameworks/base
someone correct me if im wrong pls.
Click to expand...
Click to collapse
[codegit fetch https://gerrit.omnirom.org/android_frameworks_base refs/changes/53/53/19 && git cherry-pick FETCH_HEAD[/code]
Exactly as copied and pated from the cherrypick itself, yep.
I was, however, in ~/android/omni/.repo/projects/frameworks/base, though. Now I got it fixed and inserted. thanks!
on my way to being a ROM hacker/compiler, then later developer
EDIT: Will the sources for this rescync automatically when I repo sync, or will I have to also re-cherry pickk this every few days?

dibblebill said:
[codegit fetch https://gerrit.omnirom.org/android_frameworks_base refs/changes/53/53/19 && git cherry-pick FETCH_HEAD[/code]
Exactly as copied and pated from the cherrypick itself, yep.
I was, however, in ~/android/omni/.repo/projects/frameworks/base, though. Now I got it fixed and inserted. thanks!
on my way to being a ROM hacker/compiler, then later developer
EDIT: Will the sources for this rescync automatically when I repo sync, or will I have to also re-cherry pickk this every few days?
Click to expand...
Click to collapse
If you do a "repo start" before cherry-picking, repo will try to automatically rebase when syncing. It will not sync newer patchsets though.

thanks, very useful.
just to know, why isn't it yet merged ?

BENETNATH said:
thanks, very useful.
just to know, why isn't it yet merged ?
Click to expand...
Click to collapse
Because it still has a lot of bugs that need to be worked out?
Unfortunately, since Omni went public, we've had a ton of device support stuff to work with people on, so the more difficult items have temporarily stalled.

Entropy512 said:
Because it still has a lot of bugs that need to be worked out?
Unfortunately, since Omni went public, we've had a ton of device support stuff to work with people on, so the more difficult items have temporarily stalled.
Click to expand...
Click to collapse
sadly i would say.
BBQ was a great timing but people went crazy on omni, which is a good and a bad thing ^^
i've built omni for my device, with the commit, and it's nice, but currently, it's nearly strictly an AOSP, which is a bit frustrating
keep the hard work, courage to all the omni dev !

BENETNATH said:
sadly i would say.
BBQ was a great timing but people went crazy on omni, which is a good and a bad thing ^^
i've built omni for my device, with the commit, and it's nice, but currently, it's nearly strictly an AOSP, which is a bit frustrating
keep the hard work, courage to all the omni dev !
Click to expand...
Click to collapse
Yeah, I would've liked to have polished things a bit more - but the BABBQ was an opportunity we didn't want to miss.

yep,
anyway, great work. what you guys need now is to keep that alive, and to limit the time spent on bringing devices, better enhance the rom.
Rom builders will join the effort for all the rom stuff, especially as it's really easy (i've bring my device in a dozen of minutes, from a CM branch. needs polishing but works)

Does anyone have the last patch set for multiwindow the 4.3 branch? It seems like the past two weeks worth of patches were lost after the Gerrit server hard drive failure, and I just got my first build done yesterday so I'm not sure what I can cherry pick to test out multiwindow. The last comment remaining seems to imply that the last patch set was broken.

https://gerrit.omnirom.org/#/c/1510/

chasmodo said:
https://gerrit.omnirom.org/#/c/1510/
Click to expand...
Click to collapse
That's the 4.4 branch. Time to cherry-pick!

sgt. meow said:
That's the 4.4 branch. Time to cherry-pick!
Click to expand...
Click to collapse
Are you cherry picking back to 4.3 or doing a 4.4 build? Let us know how it goes! I just set up a build this weekend for my N8013 but Gerrit was down so I couldn't get multiwindow, and when it came back the Gerrit ticket was missing two weeks worth of patches as I mentioned so I was feeling like it would be risky to try to apply it.

Porting CM12

Hi! I'm currently making a somewhat desperate attempt at porting cm12 to the d950. I know some basic things, I once tried to make a custom kernel. I have the device and vendor trees set up, with the cm12 source and the files from the flex source, and I've been making some changes. Can anyone help point me in some direction from here?

dongdong6968 said:
Hi! I'm currently making a somewhat desperate attempt at porting cm12 to the d950. I know some basic things, I once tried to make a custom kernel. I have the device and vendor trees set up, with the cm12 source and the files from the flex source, and I've been making some changes. Can anyone help point me in some direction from here?
Click to expand...
Click to collapse
Okay, so now I need to run extract-files.sh, only problem is it doesn't exist. and from my understanding, I have to already be running cm12 to do this, which obviously is not possible. Can anyone help me get the proprietary blobs?

You're better off looking at the g2 proprietary blobs as when I was trying I had the most success with them on CM11, its a good starting point

So should I take those, then make changes to suit the flex?

Yeah, its a good place to start, but it won't suddenly make it compile, it helped sort a couple of issues once we'd got it compiling in the first place....

Try msg playfulgod and see if he will point you in the right direction

Alright, I've got something that looks pretty good going, but I can't do anything without a working kernel. And as I don't know much about kernels, could Someone possibly try to make one for cm12? Also, I have the blobs from my boyfriend's g2, and I've made a lot of changes, but I might need a little more guidance. Any help is appreciated.

Do you have coding experience though thats the question.
Either Build a dummy kernel or modify the original kernel from cm11 roms that your device has and built it alongside the system images.
CyanogenMod doesnt allow Building of only the system.
Youll need to modify the following:
Kernel Source
Device Trees
Vendor Files
A good way to look at what is required for a cm12 bringup is to check other similar devices with the same architecture and compare the changes and the sources you have on your pc.
Regards
Sent from my Xperia SP using xda Forum

I took programming classes, and there were a few units on android.

So I just forked the blobs from playfulgods repo, and I've made a lot of changes to tbe devices folder, as well as 'POSSIBLY' do something good as for a kernel, but I doubt that will work. How does one build the kernel to test it? Using linux btw. I have all of the dependencies and everything, could someone explain breakfast/brunch/lunch?

HEY SO I THIN K I HAVE SOMETHING THAT MIGHT WORK AFTER HAVING SOME REALLY SMART PEOPLE HELP sorry for caps, but now I have something in the out folder for zee, what do i do with this, and how do i make it flashable? could someone do it for me? and also, kernels?

dongdong6968 said:
HEY SO I THIN K I HAVE SOMETHING THAT MIGHT WORK AFTER HAVING SOME REALLY SMART PEOPLE HELP sorry for caps, but now I have something in the out folder for zee, what do i do with this, and how do i make it flashable? could someone do it for me? and also, kernels?
Click to expand...
Click to collapse
I can write and add the meta-inf folders to make it flashable. But I don't do kernels

mattwheat said:
I can write and add the meta-inf folders to make it flashable. But I don't do kernels
Click to expand...
Click to collapse
I would really appreciate that! What means should I take of sending you the output?

dongdong6968 said:
I would really appreciate that! What means should I take of sending you the output?
Click to expand...
Click to collapse
I see 2 things with the Out Folder having problems.
1) What has the Build System Generate in the out folder?
2) CM12 will generate a pre configured Zip File if it doesn't, the build failed
Sent from my Huashan Device utilizing RR Milestone 1

Furrydaus said:
I see 2 things with the Out Folder having problems.
1) What has the Build System Generate in the out folder?
2) CM12 will generate a pre configured Zip File if it doesn't, the build failed
Sent from my Huashan Device utilizing RR Milestone 1
Click to expand...
Click to collapse
If anyone wants to take a look I zipped the out folder.

So you're going to tell us you zipped the folder but you're not going to tell us where it is? Lol
Sent from my Huashan Device utilizing RR Milestone 1

dongdong6968 said:
So I just forked the blobs from playfulgods repo, and I've made a lot of changes to tbe devices folder, as well as 'POSSIBLY' do something good as for a kernel, but I doubt that will work. How does one build the kernel to test it? Using linux btw. I have all of the dependencies and everything, could someone explain breakfast/brunch/lunch?
Click to expand...
Click to collapse
The device tree repos found in lg-devs github are the correct ones just change kernel source to our stock kernel and edit z.mk and verndor files can be extracted with the ./extract-fikes.sh script . But our kernel needs to be updated a little which i am working on mostly caf header need to be added to include/Linux for media and display. I trued using msm8974 kernel but our kernel has specific blobs we use which is easier to use stock kernel.
---------- Post added at 06:26 PM ---------- Previous post was at 06:16 PM ----------
dongdong6968 said:
HEY SO I THIN K I HAVE SOMETHING THAT MIGHT WORK AFTER HAVING SOME REALLY SMART PEOPLE HELP sorry for caps, but now I have something in the out folder for zee, what do i do with this, and how do i make it flashable? could someone do it for me? and also, kernels?
Click to expand...
Click to collapse
What you mean you got something lol. We just need to update our stock kernel which you can have a better understanding. Of what i mean visit lg-devs for z repos . we should stick to stock kernel doe.

dongdong6968 said:
I would really appreciate that! What means should I take of sending you the output?
Click to expand...
Click to collapse
Upload it to drive then message me with a link

mattwheat said:
Upload it to drive then message me with a link
Click to expand...
Click to collapse
https://www.dropbox.com/s/dx3sjp8bq720bkn/out.zip?dl=0

Furrydaus said:
So you're going to tell us you zipped the folder but you're not going to tell us where it is? Lol
Sent from my Huashan Device utilizing RR Milestone 1
Click to expand...
Click to collapse
Sorry, completely forgot. https://www.dropbox.com/s/dx3sjp8bq720bkn/out.zip?dl=0

[REQUEST] Desire 510 Rom Development Guide

Hey, as alot of us know many people have left this phone and moved on to the cooler more exciting phones. and are busy with life.....id like to request a guide for the ones that would like to make some creation and learn how to build...for the love of this phone ^-^and that have some knowledge atleast

Xendrix said:
Hey, as alot of us know many people have left this phone and moved on to the cooler more exciting phones. and are busy with life.....id like to request a guide for the ones that would like to make some creation and learn how to build...for the love of this phone ^-^and that have some knowledge atleast
Click to expand...
Click to collapse
http://forum.xda-developers.com/android/software/guide-build-port-miui-rom-to-device-t3250984 I tried with this but I was getting to much rejects and I couldn't fix them all by my self. Most likely because I was trying to patch the stock 64 bit. But you have the CM, RaptorROM that are more vanilla like. If you are lucky you should be getting less rejects then me. :highfive:

denny.hell said:
http://forum.xda-developers.com/android/software/guide-build-port-miui-rom-to-device-t3250984 I tried with this but I was getting to much rejects and I couldn't fix them all by my self. Most likely because I was trying to patch the stock 64 bit. But you have the CM, RaptorROM that are more vanilla like. If you are lucky you should be getting less rejects then me. :highfive:
Click to expand...
Click to collapse
Ok cool i just pulled that same guide up, ill try it out and see where i get!
Sent from my iPhone using Tapatalk

Xendrix said:
Ok cool i just pulled that same guide up, ill try it out and see where i get!
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
If you need help with the rejects just ask. I'm sure I could spare some time to help out

denny.hell said:
http://forum.xda-developers.com/android/software/guide-build-port-miui-rom-to-device-t3250984 I tried with this but I was getting to much rejects and I couldn't fix them all by my self. Most likely because I was trying to patch the stock 64 bit. But you have the CM, RaptorROM that are more vanilla like. If you are lucky you should be getting less rejects then me. :highfive:
Click to expand...
Click to collapse
That was really not all that great of an instruction on how to get started with rom building because for 1 unless you have a really super fast computer trying to do that in a VMWARE is going to take forever because the first compile and build takes hours upon hours I'm not kidding when I said you needed to download the entire CyanogenMod or AOSP source code and apparently from all the changes people have made its up over 13GB which is huge mind you the first build is going to give quite a few errors which you'll need to fix by going into your github and making changes to the specific file that needs changing and then repo sync or just change it on your local computer first then push it to github.. You did fork the device tree to your own github right? Then you have to download the device tree source to your local pc in order to even begin building anything. They also need to be in the correct spot by the way or the build is gonna throw an error that it can't find / or so and so doesn't exist.. By the way the 3 device tree files you're gonna need are "Device, Vendor and Kernel.."..
https://wiki.cyanogenmod.org/w/Development
https://wiki.cyanogenmod.org/w/Doc:_porting_intro

MrMike2182 said:
That was really not all that great of an instruction on how to get started with rom building because for 1 unless you have a really super fast computer trying to do that in a VMWARE is going to take forever because the first compile and build takes hours upon hours I'm not kidding when I said you needed to download the entire CyanogenMod or AOSP source code and apparently from all the changes people have made its up over 13GB which is huge mind you the first build is going to give quite a few errors which you'll need to fix by going into your github and making changes to the specific file that needs changing and then repo sync or just change it on your local computer first then push it to github.. You did fork the device tree to your own github right? Then you have to download the device tree source to your local pc in order to even begin building anything. They also need to be in the correct spot by the way or the build is gonna throw an error that it can't find / or so and so doesn't exist.. By the way the 3 device tree files you're gonna need are "Device, Vendor and Kernel.."..
https://wiki.cyanogenmod.org/w/Development
https://wiki.cyanogenmod.org/w/Doc:_porting_intro
Click to expand...
Click to collapse
Yes, everything you said is correct. I was only giving him a starting point. I know that porting, in this case patching, is a lot more easier than building, if done properly. If he wants to build and to learn a lot of stuff I personally advice him to follow your advice.
But in the end it's up to him. At least now he has two starting points. :highfive:

denny.hell said:
Yes, everything you said is correct. I was only giving him a starting point. I know that porting, in this case patching, is a lot more easier than building, if done properly. If he wants to build and to learn a lot of stuff I personally advice him to follow your advice.
But in the end it's up to him. At least now he has two starting points. :highfive:
Click to expand...
Click to collapse
That's true, 2 starting points is better than none.. I don't necessarily like "patching" others work because you never really know how they made it or if it has problems which is why I just start from scratch.

Yes starting from scratch was initially what i wanted but i looked around on XDA university for a week and that helped get me to learn about setting up Vm, installing android sdk through terminal ETC and repo init repo sync, downloading repositories and other source codes.....BUT my thing is wanting to learn how patch errors and need more on hands experience for setting up build environment
Sent from my iPhone using Tapatalk

Custom Roms/LineageOS on SM-T505

Hello, everyone.
I noticed, there are many custom roms, but not that many for the SM-T505. Is it because it's newly released, or are there other reasons?

Yes, this is a new device and many people are probably waiting for the Black Friday/Cyber Monday deals to grab one. I just grabbed one for $150 on Amazon, a steal compared to something like a Fire tablet IMO. This is a low-end tablet, so there won't be as much focus on it as say a flagship phone. But thankfully it's already been unlocked and rooted, so the next step will be to get TWRP on it, and then custom ROM development can start to pick up on it. Don't expect any updates before the end of the year for custom ROMs though, it will likely take time to have TWRP up and running on it, but I am hopeful that we will see good things on this tablet in 2021

Without kernel sources it won't happen. See https://opensource.samsung.com/uploadSearch?searchValue=sm-t505 and https://opensource.samsung.com/uploadSearch?searchValue=sm-t500.
You can request them on that page. I did it a few times but no response so far.

paziusss said:
Without kernel sources it won't happen. See https://opensource.samsung.com/uploadSearch?searchValue=sm-t505 and https://opensource.samsung.com/uploadSearch?searchValue=sm-t500.
You can request them on that page. I did it a few times but no response so far.
Click to expand...
Click to collapse
Interesting... is it just me or is there no button to start an inquiry?
EDIT: Found it... just posted an Inquiry.

Watching!! I just bought the T500.

jlang11 said:
Watching!! I just bought the T500.
Click to expand...
Click to collapse
Just got an answer from Samsung, but don't get to excited. It was just an automated answer, that they received my inquiry. So stay tuned...

https://opensource.samsung.com/uploadSearch?searchValue=t500 gives you a 514mb file with kernel and vencor files.
Maybe both 505 and 500 are similiar enough to get you started

Sources are available: https://opensource.samsung.com/uploadSearch?searchValue=sm-t500
They include a toolchain in kernel tree, broken KConfigs and a lot of junk. I will try to clean a bit a mess and update a lean kernel tree to github

paziusss said:
Sources are available: https://opensource.samsung.com/uploadSearch?searchValue=sm-t500
They include a toolchain in kernel tree, broken KConfigs and a lot of junk. I will try to clean a bit a mess and update a lean kernel tree to github
Click to expand...
Click to collapse
Will you also do a diff against the upstream version so we can see what they changed?

selemine said:
Will you also do a diff against the upstream version so we can see what they changed?
Click to expand...
Click to collapse
Sure, but I'm going to remove the toolchain from the kernel tree since the beginning. It takes About 1GB alone and I don't want to have it on git refs because it will still take a lot of space even if removed.
The rest of changes will be available on github.

paziusss said:
Sure, but I'm going to remove the toolchain from the kernel tree since the beginning. It takes About 1GB alone and I don't want to have it on git refs because it will still take a lot of space even if removed.
The rest of changes will be available on github.
Click to expand...
Click to collapse
It's been a long time, since i took up building custom roms and forgot about it for a while... if the kernel is cleansed from all the BS no one needs, that would be awesome.

There are a lot of small changes to comments and changes of 2 characters in a line. Wonder if they backported stuff there.

Kernel of the SM-T505 was just released...
If this is of any relevance, the download is 'just' 200MB... i wonder why.

The Platform Archive is mostly identical, just a few text files with notes and copyright were missing.
The Kernel Package as well, just small changes to netfilter and
a new defconfig file.
Defconfig for both devices also is more or less the same
gta4lwifi_eur_open_defconfig is missing one line compared to gta4l_eur_open_defconfig
CONFIG_SAMSUNG_FREECESS=y
Guess the difference comes from the toolchain mentioned above.

@paziusss
How far have you come?
Would be great if we had something clean to start a twrp and easier rooting

selemine said:
@paziusss
How far have you come?
Would be great if we had something clean to start a twrp and easier rooting
Click to expand...
Click to collapse
Sorry, I have a very bad internet connection (uplink it is ~50-100KiB/s)
I created the repo a month ago: https://github.com/pazos/android_kernel_samsung_gta4lwifi
,tried to push and failed. Never tried again until now, but it is still failing.
So, if somebody is nice enough to dump the contents of the SM-T500 kernel in a github repo, I can fork and submit the patches without having to upload the whole thing myself.

paziusss said:
Sorry, I have a very bad internet connection (uplink it is ~50-100KiB/s)
I created the repo a month ago: https://github.com/pazos/android_kernel_samsung_gta4lwifi
,tried to push and failed. Never tried again until now, but it is still failing.
So, if somebody is nice enough to dump the contents of the SM-T500 kernel in a github repo, I can fork and submit the patches without having to upload the whole thing myself.
Click to expand...
Click to collapse
Here you go

jayzarry84 said:
Here you go
Click to expand...
Click to collapse
Thank you! It helped.
I had to apply the patch manually, so everything is in a single commit, but should be easy for others to understand what each chunk of code does.
Here you go: https://github.com/pazos/android_kernel_samsung_gta4lwifi

paziusss said:
Thank you! It helped.
I had to apply the patch manually, so everything is in a single commit, but should be easy for others to understand what each chunk of code does.
Here you go: https://github.com/pazos/android_kernel_samsung_gta4lwifi
Click to expand...
Click to collapse
Just realized I didn't upload the Platform folder contents. It's uploading as we speak

jayzarry84 said:
Just realized I didn't upload the Platform folder contents. It's uploading as we speak
Click to expand...
Click to collapse
I really have to ask, can i use this to build a custom rom for the SM-T505 as well?