[Q] MTK6589 / MT6589 Overclock - Help building Kernel - Android Q&A, Help & Troubleshooting

I have a Star S9500 with MTK6589 Cortex-A7 Quad Core @ 1.2GHz with PowerVR SGX544 Single Core.
I have the Kernel Source extracted from an Acer smartphone here: https://github.com/varunchitre15/MT6589_kernel_source .
In the MT6589_kernel_source/mediatek/platform/mt6589/kernel/core/mt_cpufreq.c file, in the line 127 has the code:
Code:
static unsigned int g_max_freq_by_ptp = DVFS_F1; /* default 1.2GHz */
If I change it to:
Code:
static unsigned int g_max_freq_by_ptp = DVFS_F0_0; /* OC 1.7GHz */
it changes from 1209000 KHz to 1703000 KHz, as in the line 70:
Code:
#define DVFS_F0_0 (1703000) // KHz
#define DVFS_F0_1 (1599000) // KHz
#define DVFS_F0_2 (1508000) // KHz
#define DVFS_F0_3 (1404000) // KHz
#define DVFS_F0_4 (1300000) // KHz
#define DVFS_F1 (1209000) // KHz
#define DVFS_F2 ( 988000) // KHz
#define DVFS_F3 ( 754000) // KHz
#define DVFS_F4 ( 497250) // KHz
I think I don't need to change de voltage as it is already set to the max supported by the Kernel.
I don't have problems with overheating or extreme battery drain, as I have the CPU Master Pro app and when the screen is off or he is overheating it sets to 500MHz x4.
I want to OC the GPU too, but I can't find the line to change te clock in the MT6589_kernel_source/mediatek/platform/mt6589/kernel/core/mt_gpufreq.c file.
I already built the Kernel in Debian OS succefully, but now I don't know how to put to .img to flash it!
Anyone can build the Kernel and publish it or just tell me what must I do?
EDIT: I just want to be able to play Real Racing 3 at 960p. I only get a great performance at standard FWVGA resolution and if I set 960x1708 @ 390 DPI screen the performance is very good except in Real Racing 3 and other graphical intense games.
Best regards,
Ivan Santos.

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IvanSantosPT said:
I have a Star S9500 with MTK6589 Cortex-A7 Quad Core @ 1.2GHz with PowerVR SGX544 Single Core.
I have the Kernel Source extracted from an Acer smartphone here: https://github.com/varunchitre15/MT6589_kernel_source .
In the MT6589_kernel_source/mediatek/platform/mt6589/kernel/core/mt_cpufreq.c file, in the line 127 has the code:
Code:
static unsigned int g_max_freq_by_ptp = DVFS_F1; /* default 1.2GHz */
If I change it to:
Code:
static unsigned int g_max_freq_by_ptp = DVFS_F0_0; /* OC 1.7GHz */
it changes from 1209000 KHz to 1703000 KHz, as in the line 70:
Code:
#define DVFS_F0_0 (1703000) // KHz
#define DVFS_F0_1 (1599000) // KHz
#define DVFS_F0_2 (1508000) // KHz
#define DVFS_F0_3 (1404000) // KHz
#define DVFS_F0_4 (1300000) // KHz
#define DVFS_F1 (1209000) // KHz
#define DVFS_F2 ( 988000) // KHz
#define DVFS_F3 ( 754000) // KHz
#define DVFS_F4 ( 497250) // KHz
I think I don't need to change de voltage as it is already set to the max supported by the Kernel.
I don't have problems with overheating or extreme battery drain, as I have the CPU Master Pro app and when the screen is off or he is overheating it sets to 500MHz x4.
I want to OC the GPU too, but I can't find the line to change te clock in the MT6589_kernel_source/mediatek/platform/mt6589/kernel/core/mt_gpufreq.c file.
I already built the Kernel in Debian OS succefully, but now I don't know how to put to .img to flash it!
Anyone can build the Kernel and publish it or just tell me what must I do?
EDIT: I just want to be able to play Real Racing 3 at 960p. I only get a great performance at standard FWVGA resolution and if I set 960x1708 @ 390 DPI screen the performance is very good except in Real Racing 3 and other graphical intense games.
Best regards,
Ivan Santos.
Click to expand...
Click to collapse
Why don't you try to upload and share your compiled kernel (i.e zImage) with us, we can test it, and if it's really working, we can work on overclock gpu too..

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IvanSantosPT said:
I have a Star S9500 with MTK6589 Cortex-A7 Quad Core @ 1.2GHz with PowerVR SGX544 Single Core.
I have the Kernel Source extracted from an Acer smartphone here: https://github.com/varunchitre15/MT6589_kernel_source .
In the MT6589_kernel_source/mediatek/platform/mt6589/kernel/core/mt_cpufreq.c file, in the line 127 has the code:
Code:
static unsigned int g_max_freq_by_ptp = DVFS_F1; /* default 1.2GHz */
If I change it to:
Code:
static unsigned int g_max_freq_by_ptp = DVFS_F0_0; /* OC 1.7GHz */
it changes from 1209000 KHz to 1703000 KHz, as in the line 70:
Code:
#define DVFS_F0_0 (1703000) // KHz
#define DVFS_F0_1 (1599000) // KHz
#define DVFS_F0_2 (1508000) // KHz
#define DVFS_F0_3 (1404000) // KHz
#define DVFS_F0_4 (1300000) // KHz
#define DVFS_F1 (1209000) // KHz
#define DVFS_F2 ( 988000) // KHz
#define DVFS_F3 ( 754000) // KHz
#define DVFS_F4 ( 497250) // KHz
I think I don't need to change de voltage as it is already set to the max supported by the Kernel.
I don't have problems with overheating or extreme battery drain, as I have the CPU Master Pro app and when the screen is off or he is overheating it sets to 500MHz x4.
I want to OC the GPU too, but I can't find the line to change te clock in the MT6589_kernel_source/mediatek/platform/mt6589/kernel/core/mt_gpufreq.c file.
I already built the Kernel in Debian OS succefully, but now I don't know how to put to .img to flash it!
Anyone can build the Kernel and publish it or just tell me what must I do?
EDIT: I just want to be able to play Real Racing 3 at 960p. I only get a great performance at standard FWVGA resolution and if I set 960x1708 @ 390 DPI screen the performance is very good except in Real Racing 3 and other graphical intense games.
Best regards,
Ivan Santos.
Click to expand...
Click to collapse
Any news? A Kernel upload could help you and the community.
However. Read this http://forum.xda-developers.com/showthread.php?t=1748297
This helped me to recompile a GNex Kernel... added missing SmartassV2 :laugh:

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IvanSantosPT said:
I only get a great performance at standard FWVGA resolution and if I set 960x1708 @ 390 DPI screen the performance is very good except in Real Racing 3 and other graphical intense games.
Best regards,
Ivan Santos.
Click to expand...
Click to collapse
Wow, how you can that? 960x1708 @390 DPI.... can you spend a little more time to explain us how we can? :fingers-crossed:

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I have Wiko Stairway with this processor (MT 6589), your kernel will work with my phone ?

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Maybe this will help to pack to img:
http://forum.xda-developers.com/showthread.php?t=2364271
---------- Post added at 10:26 AM ---------- Previous post was at 10:15 AM ----------
http://forum.xda-developers.com/showthread.php?t=1587411

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I use Virtuous Ten Studio (VTS) you can search XDA for it. Quite popular as it unpacks boot.img, allows edits to ramdisk, and you can swap zimage and pack it back together into a new boot.img
Also, it de-compiles, de-odex, blah blah blah.... Pretty much a 1 stop shop. Runs in windows. Sure beats doing all it from a cmd window!

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IvanSantosPT said:
I have a Star S9500 with MTK6589 Cortex-A7 Quad Core @ 1.2GHz with PowerVR SGX544 Single Core.
I have the Kernel Source extracted from an Acer smartphone here:
Ivan Santos.
Click to expand...
Click to collapse
Ivan, I'm curious. You have a Star S9500 device. And you're using kernel source from an Acer smartphone???
Uhm, unless I am mistaken, you really shouldn't use kernel source from a different device, as the results could be bad. Unless the devices are identical and branded under a different name.
I also am searching kernel source for my ExPlay X-Tremer which uses the MTK6589 CPU.
Am quite interested in your results.
MD

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Hi
Well, sorry but you cant OC an Mediatek SoC, it doesnt use those freq-values. Its still an mystery how to do it on that brand. since they will never share the FULL sourcecode.
All you will be able to do, by changing that is to display an "value" it will be only Visual, And not actually overclocked.
So just stop wasting your time on that. Will never work
You can also ask varun his also an kernel developer with experience on the MTK platform. Still the answer will be the same.
On an side note, you just build an kernel that will only work on the original acer device, not yours. It doesn't work that way lol
Its not all JUST about having the same SoC, there are other things:
Alps, magnetic sensor, proximity, etc that you need to config on kernel boardconfig to work on your device.
For packing /unpacking, since this is an MTK device, the best tool is Bruno Martins pack and unpack scripts:
forum.xda-developers.com/showthread.php?t=1587411
B.Regards

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superdragonpt said:
Hi
Well, sorry but you cant OC an Mediatek SoC, it doesnt use those freq-values. Its still an mystery how to do it on that brand. since they will never share the FULL sourcecode.
All you will be able to do, by changing that is to display an "value" it will be only Visual, And not actually overclocked.
So just stop wasting your time on that. Will never work
You can also ask varun his also an kernel developer with experience on the MTK platform. Still the answer will be the same.
On an side note, you just build an kernel that will only work on the original acer device, not yours. It doesn't work that way lol
Its not all JUST about having the same SoC, there are other things:
Alps, magnetic sensor, proximity, etc that you need to config on kernel boardconfig to work on your device.
For packing /unpacking, since this is an MTK device, the best tool is Bruno Martins pack and unpack scripts:
forum.xda-developers.com/showthread.php?t=1587411
B.Regards
Click to expand...
Click to collapse
Exactly, not to mention trying to install a kernel meant for another device could have disastrous results...
As far as Full kernel source, I'm not even sure if the device manufacturers even have it. I suppose a lot of these devices are just "re-branded" clones, as I have been getting nowhere in answer on anything from Ex-Play, even citing GPL and such. "Somebody" has it, as 2 other ROMs (MIUI and Lewa) have 2 available ROMs, but I would guess they use the same zimage, considering they run the same OS version.
With the source, could check freq tables, and see if they use a speedo id that can be faked. But without current source, just don't know.
Still searching for the elusive kernel source

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Moscow Desire said:
Exactly, not to mention trying to install a kernel meant for another device could have disastrous results...
As far as Full kernel source, I'm not even sure if the device manufacturers even have it. I suppose a lot of these devices are just "re-branded" clones, as I have been getting nowhere in answer on anything from Ex-Play, even citing GPL and such. "Somebody" has it, as 2 other ROMs (MIUI and Lewa) have 2 available ROMs, but I would guess they use the same zimage, considering they run the same OS version.
With the source, could check freq tables, and see if they use a speedo id that can be faked. But without current source, just don't know.
Still searching for the elusive kernel source
Click to expand...
Click to collapse
All the available kernel sources for the MTK platform can be found on my git:
https://github.com/dragonpt
And from varunchitre15 git:
https://github.com/varunchitre15?tab=repositories
As for OC, it was already tried in the past, yes after moding the kernel freq it shows OC values, but they are only Visual, MTK code is really weird.
About sourcecode, only some OEM's have release those, and it tooked ALOT of efforts for it (Petitions and so on), and all we got was the kernel source of course, and most of it it's NOT buildable (needs some fixs to compile).
As for my OEM, they said, they never got it, lol funny no?
This is one of the most ANTI-GPL, Closed Source Company i ever saw, in these last years...
Also Mediatek uses alot of Hacks on their code, i.e: the compiled zlmage needs an patch on kernel header to boot.
regards

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superdragonpt said:
Also Mediatek uses alot of Hacks on their code, i.e: the compiled zlmage needs an patch on kernel header to boot.
regards
Click to expand...
Click to collapse
Thanks Mate. Yeah, looking over the sources, it's quite a mess in there! Tegra3 is so much more in order.
Will have to check my proc, and see which defconfig I use. Seems like a logical place to start. And talk about strange, they use only the Hotpug governor, although it seems several are available, but clearly they aren't set up for the device correctly as only Hotplug works, and the other configs have horrible performance.
Cheers

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Moscow Desire said:
Thanks Mate. Yeah, looking over the sources, it's quite a mess in there! Tegra3 is so much more in order.
Will have to check my proc, and see which defconfig I use. Seems like a logical place to start. And talk about strange, they use only the Hotpug governor, although it seems several are available, but clearly they aren't set up for the device correctly as only Hotplug works, and the other configs have horrible performance.
Cheers
Click to expand...
Click to collapse
If you wanna start kernel compiling in this platform, the usuall config.gz wont work, if you are lucky enought you may find some old configs on kernel source code, then the "make oldconfig" should work, if the source doesnt have it then it will be an pain in the a## to compile.
Also some tips:
MTK kernels usually compile only with linaro toolchain 4.6.x or less, higher that this and its gonna be an mess with alot of compiler errors.
About the govs, yes on my tab(6589 soc) seems that the hotplug is the only one working ok, the other 2 govs seems that are only using the first 2 cores.
On the boardconfig, you can add several other govs, and IO,s, but i never add those, i may try that in the future and check if those extra govs work ok.
Regards

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superdragonpt said:
If you wanna start kernel compiling in this platform, the usuall config.gz wont work, if you are lucky enought you may find some old configs on kernel source code, then the "make oldconfig" should work, if the source doesnt have it then it will be an pain in the a## to compile.
Also some tips:
MTK kernels usually compile only with linaro toolchain 4.6.x or less, higher that this and its gonna be an mess with alot of compiler errors.
About the govs, yes on my tab(6589 soc) seems that the hotplug is the only one working ok, the other 2 govs seems that are only using the first 2 cores.
On the boardconfig, you can add several other govs, and IO,s, but i never add those, i may try that in the future and check if those extra govs work ok.
Regards
Click to expand...
Click to collapse
Thanks for the tip on the toolchain. I usually use Google's latest. Never installed linaro as I really haven't seen a lot of difference in other testing comparisons. Generates a bunch of errors, but usually on things not specific to my device. Sloppy programming I guess.My guess is it's up to the device manufaturers responsibility to clean up the code.
Cheers

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i am interested in under-voltage! very useful for battery time

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I will be really happy is someone explains to me how can i overclock my mt6589?

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chenrp said:
i am interested in under-voltage! very useful for battery time
Click to expand...
Click to collapse
Check Varun's Git sources, it's there...
rdlegy said:
I will be really happy is someone explains to me how can i overclock my mt6589?
Click to expand...
Click to collapse
There's nothing to explain at this point. It simply CAN'T be Overclocked, Mediatek Code isn't the same as (i.e)Qualcomm ...
(It's so Messy --...)
Regards

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mtk and spd are the two biggest chinese chip companies that don't provide source code, you won't be able to modify your device except root it for some work