[KERNEL][AOSP][AnyKernel] Gamma Kernel for D855/D852/D851/D850/VS985/LS990 - G3 Android Development

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DESCRIPTION
This is a custom based Kernel for the D855/D852/D851/D850/VS985/LS990 variants of the LG G3 with performance enhancements and bug fixes that I have been using personally for a few months, thought it is time to share since I have had no inconvenient bugs and quite a big performance increase and smooth UI benefits. The intention is to have a minimal light-weight kernel that is fine tuned for the device.
FEATURES
User space voltage control
Backport MSM devfreq features from 3.18 Kernel for the smoothest experience, includes adding cache fabric frequency scaling and better bus utilization as well as the mincpubw governor
User space display color calibration (KCAL)
Deeper memory controller power savings on suspend (deeper power savings while sleep)
Two new L2 cache frequency steps: 1.88 & 2.03 GHz, allows for better multi-core utilization and hit rates
Wireless roaming disconnecting is now fixed
IRQ Balancer enabled with proper SELinux support to spread out the interrupts of our SoC
IntelliPlug to allow lower thermal dissipation by keeping some cores alive to distribute loads and keep frequencies lower accross SoC die
Reduced heat when using wireless chargers
Memory and cache subsystem optimizations, you will feel it int the UI
Adreno Idler to get better GPU frequency utilization and battery life [removed as msm-adreno now idles properly]
Interactive governor tweaks to focus on lower frequencies while still maintaining fluidity in the UI
BFQ IO scheduler set by default to avoid slow-downs on task intensive scenarios
No overclocking was chosen to avoid unnecessary heat, optimizations were focused on other different areas
Kernel Samepage Sharing enabled with deferred timer by default to gain some memory usage optimizations
Compiled with GCC 6.x optimized toolchain and -O3 plus other hardware specific flags
Undervolted the Adreno 330 GPU voltage rail to keep things cooler, and reduced the GPU min frequency to 27 MHz while keeping it's temperature cool to reach 620 MHz overclock
Default thermal values work ok, since GPU voltage rails and others were shaved a few mV
100 Hz tick to prevent excessive battery usage, the smoothness of the UX does not come alone from raw processing -- there are many other changes in the subsystem that helped achieve the fluidity
An ultra low value in the interactive min_sample_time so that the interactive governor does not hover on excessive frequencies
Heavily tuned the GPU bandwidth and bus requirements to match closer the capabilities of the device and thus preventing micro-stutters
Optimized the MSM crypto engines thanks to @waau
Updated the KGSL drivers so that we can use the Adreno userspace drivers version Adreno-MOB30M-for-LG-G3-AOSP.zip
DOWNLOADS
AnyKernel: Click Here (Check Top of the Post, Download Tab)
SOURCE
D85X-Kernel-Gamma GitHub Source
NOTES
I recommend turning NFC off for way better idle battery consumption :victory:
KNOWN BUGS
FM Radio is causing hangs, still needs investigation
<< If you like my work here is my hat, please donate! >>​
​
XDA:DevDB Information
Gamma Kernel , Kernel for the LG G3
Contributors
Omar-Avelar
Source Code: https://github.com/oxavelar/D85X-Kernel-Gamma
Kernel Special Features:
Version Information
Status: Stable
Current Stable Version: 90.0.0
Stable Release Date: 2018-05-10
Created 2016-08-09
Last Updated 2018-05-13

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Thank you for this kernel, I have a question:
Fast charging is implemented?
Thanks again

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@Omar-Avelar Download link for d855 leads to d851 version and vice versa..
Sent from my caseless LG G3, because I believe in myself

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Is there a sound mod for headphone gain?

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download link need to update, will try it and report.
THANK YOU!!!!!

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after instelling the kernel on my d855 with the xenon rom it doesnt charge via usb in the pc... i am at work right now and cant check in the wall socket.

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@agdish84, I have now updated the links, thanks... I missed that.
Hey @jochem86, USB charging is working on CM ROM's so I wonder if Xenon ROM is doing anything funky, mmm... I will check if Xenon has anything strange but it is not touching anything charge related.
This Kernel does not support USB force fast charge because fast charging will cause batteries to age faster. It's a trade-off, and usually ends up providing more heat. Not sure if I will put support on forced USB fast charge or not.

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Omar-Avelar said:
@agdish84, I have now updated the links, thanks... I missed that.
Hey @jochem86, USB charging is working on CM ROM's so I wonder if Xenon ROM is doing anything funky, mmm... I will check if Xenon has anything strange but it is not touching anything charge related.
This Kernel does not support USB force fast charge but might do add it in the week if a lot of people feel the need of it. [Btw, personally this is the main reason why I did not enable fast charging enabled sysfs force control - URL]
Click to expand...
Click to collapse
Dirty flashed the xenon again and it charges again without any problem. I have to say some other roms it doesnt charge in usb when i am using it... with xenon it doest but very slow, that is normal. But also in deep sleep, it doenst charge a bit... i guess in xenon the fast charge is enabled and other roms not bu default. i hope you figure out whats messign it up.

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jochem86 said:
Dirty flashed the xenon again and it charges again without any problem. I have to say some other roms it doesnt charge in usb when i am using it... with xenon it doest but very slow, that is normal. But also in deep sleep, it doenst charge a bit... i guess in xenon the fast charge is enabled and other roms not bu default. i hope you figure out whats messign it up.
Click to expand...
Click to collapse
Thanks for the update, and do let me know how do you feel this Kernel in terms of performance against the others you've used. It doesn't have to be immedeatly, use it for a while and give me some feedback on things you see are working good too, thanks a lot

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Omar-Avelar said:
Thanks for the update, and do let me know how do you feel this Kernel in terms of performance against the others you've used. It doesn't have to be immedeatly, use it for a while and give me some feedback on things you see are working good too, thanks a lot
Click to expand...
Click to collapse
That was my intention to give you my experience but my batt was pretty low so i changed it back to stock kernel... as i am on my work right now but for those few minutes i tried it felt pretty smooth.

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Omar-Avelar said:
Thanks for the update, and do let me know how do you feel this Kernel in terms of performance against the others you've used. It doesn't have to be immedeatly, use it for a while and give me some feedback on things you see are working good too, thanks a lot
Click to expand...
Click to collapse
In terms of performance? Oh yes, give me time to flash CM13 and test UI smoothness, I have feeling this is right thing for that. Waiting for this for a long time.

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@Omar-Avelar do you have any plans on adding gamma control? I'm really enjoying myself atm running it with Zephyr os rom. Ty for your hard work!
Sent from my caseless LG G3, because I believe in myself

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AICP booted, the 10 seconds I have had it on it seems really snappy, will let you know how it goes.

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stuck on splash screen after installing...
D855 32GB - Fullmics ROM

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grymmy said:
stuck on splash screen after installing...
D855 32GB - Fullmics ROM
Click to expand...
Click to collapse
Fulmics is stock based from what I have read (I've never installed it personally). But I am glad to hear that you tried it out there but too bad it doesn't work on Fulmics!
I will add some notes to the thread to let other people know.

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Jagdish84 said:
@Omar-Avelar do you have any plans on adding gamma control? I'm really enjoying myself atm running it with Zephyr os rom. Ty for your hard work!
Sent from my caseless LG G3, because I believe in myself
Click to expand...
Click to collapse
I think I will do that, it might be about the only things that are do needed and won't interfere as much with stability. Gimmie a few weeks to get some free time.

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Omar-Avelar said:
Fulmics is stock based from what I have read (I've never installed it personally). But I am glad to hear that you tried it out there but too bad it doesn't work on Fulmics!
I will add some notes to the thread to let other people know.
Click to expand...
Click to collapse
thank you for such speedy feed back. I'm about to install Zephyr os rom and test...thanks again

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Using this kernel made me love my phone again. Was using Latest CM 13 and UI was time to time laggy and slow. Flashed this kernel and device runs smooth as butter. Love that kernel does not overclock anything so i know that i don't shorten life span of my cpu. Kudos to @Omar-Avelar for developing something like this!

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Could you add DT2S and DT2W on your kernel?
#ParanoidAndroid

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Phone heats up a lil while charging... Didn't use it or anything, just picked it up to see the time and it felt rather warm to me, using zephyr rom and a lil undervolting. Btw, during regular usage phone is stone cold, kudos!
Sent from my caseless LG G3, because I believe in myself