PIE GPS blob for i9300

[mcgi5sr2]

Hi everybody,

Not sure if anyone frequents this anymore but I have started a project set to replace the npe GPS vendor blob of the i9300. This is so that the android/bionic patch will no longer be required and we can push for CM and other official rom support from Lollipop upwards.

The nexus 7 (Grouper) has the same GPS chipset as we do on the i9300 (BCM47511 ) and the blobs are PIE, so a straight swap should be easy.

Turns out not quite the case, I have got it so that the phone can find satellites, a little bit slow, but finds them nonetheless. However I can't get it to fix on them yet.

If people are interested in this project I will post up, what I have done and any logs etc I have gathered. I can't say for sure but I imagine that the solution for the i9300 would be very similar to that of the Samsung Note N7000 as well, if any devs from there are interested.

XDA:DevDB Information
Grouper GPS blobs on S3 GT-i9300, ROM for the Samsung Galaxy S III I9300

Contributors
mcgi5sr2, mcgi5sr2
ROM OS Version: 5.1.x Lollipop
ROM Kernel: Linux 3.0.x
Based On: AOSP

Version Information
Status: Testing

Created 2015-08-26
Last Updated 2015-08-26

 

[mcgi5sr2]

Hi everybody,

FYI this is almost completed now, just some tidying and further testing

 

[Chimbat]

I can't help except for testing and i wish you and all devs who will cooperates good luck in this project.

 

[mcgi5sr2]

This project can be considered complete now, the commits are on my repos which have just been updated.
No doubt still need a good clean/purge.
https://github.com/mcgi5sr2/device_samsung_i9300/commit/c945cb3679ff63c573ee1c50196d26e451585537 Device tree
https://github.com/mcgi5sr2/proprietary_vendor_samsung-haxynox/commit/076b49ac9009987ce3cff8316416602123c1233c proprietary vendor

 

[thechosenone43]

Hello devs
I'm looking for a script or zip to flash on my I9300 for a ROM where the GPS not working! Is this the solution here?
And how to implement the script you made? I'm not a technical Ingenieur thanks for your kind answer

 

[mcgi5sr2]

Hello devs
I'm looking for a script or zip to flash on my I9300 for a ROM where the GPS not working! Is this the solution here?
And how to implement the script you made? I'm not a technical Ingenieur thanks for your kind answer

This is not the solution as it isn't a flashable zip. It also more than likely doesn't contain the relevant code you require. What rom are you using? Perhaps I could help the Dev?

 

[thechosenone43]

Thanks for quick responding
The 2 ROMs I was using been Dirty Unicorn 5.1 and Validus 5.1 ROM where the GPS not working! I think Andrea Turchet is the developer from both of the ROMs. I asked the Developer for a fix but nothing happened since them. I think they stopped working on DU already since the I9300 comes @ his ages
Maybe you can get in touch with the devs and find a solution?
Thanks in advance :thumbup:

 

[jt12345]

Hi @mcgi5sr2

I'm running the official CM13 nightlies (by @forkbomb444) on my i9300, and I've got a problem with the GPS. I can see satelittes and get a fix, but it drops every minute or two.

I posted about the problem here but I've been trying to investigate further so I wanted to see if I could use older copies of gpsd, gps.exynos4.so and libsecril-client.so to see whether that would "fix" the problem - that idea lead me to this commit which in turn lead me to this thread.

Do you know whether I can easily downgrade these blobs on my i9300 CM13? (I can find them easily enough, but I notice that the filenames have changed - I don't understand the android gps subsystem architecture to know what to do next).

Alternatively (since this is not my daily driver phone), I can install the original haxynox AOSP Rom to see whether this has the same problem.

Any pointers/assistance to help me to investigate this would be greatly appreciated.

Thank you, Jaime

 

[mcgi5sr2]

Hi,
I have stopped development, but can relate to the issue you have mentioned. The grouper blobs are even older than the S3 blobs but were PIE and thus functioned on M where PIE blobs were required. They also lacked some of the functionality that native Samsung blobs had built in. All of this was a sacrifice to get GPS working on M. So going back to older blobs won't help. I haven't checked but perhaps newer Grouper blobs if they exist would help.