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ClockworkMod (CWM) Recovery easy install for RK3066 and RK3188 -- TWRP/CWM Flash-Tool and root for RK3288

 Please donate to support OMA and CrewRKTablets firmware work, thank you !

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[ ROM ] ManuROM iFive X2 4.4.2 v2.0.1
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manupc

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2014/02/05 - 17:52
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JochenKauz if what you tell about is only cpu related then those higher benchmark scores are coming only from gpu and ddr oc and not from the cpu? So 1800 would be working as 1600 but shown in cpu monitoring as 1800?

How would you start a kernel project for a specific tablet if there is no kernel source for it? Im just curious and i hope you guys are able to!

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JochenKauz

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2014/02/05 - 20:12
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Hi ManuPC,

I think I could best explain the problem with this:

https://github.com/crewrktablets/rk30_kernel/commit/c93447601546838855533adaa88dc5ac7a7507c7

Don't know if you ever compiled a kernel by yourself..

Look at the commit I made, and ignore the unimportant deletes.

 

The changes needed for Overclocking a RK3x is much more complicated than only changing a frequency table, this was only the case in RK2918. The above changes are for RK3066, but the difference to RK3188 is not great, the principle is the same.

If you are a lucky guy, the limits are only in the frequency table (board-xxx.c), then all is fine and in your case it seems you are a lucky guy.

You could check if this really works with NoFrills. In the app you can see if the stepping works (statistics). In the stats you can see how much processor time is spend in what speed step. If the limit is on, you never reach the 1800GHz, if it goes to 1800GHz no limit is applied from the clock-data.

 

Regarding kernel development..

It's a really hard way.

We search for kernel sources all over the world. Then we look what can be useful, even it is a 3.0.8. We merge changes from Android mainline 3.0 kernel. And we do reverse engineering by disassembling the kernel to find the right sources and parameters to use. 

The stick sources are crippled and in much places not usable, cause sticks don't have so much things we need for tablets, like LCD, gsensor, touch, battery and so on. The complete framebuffer differs from tablets, cause they have always HDMI output, no LCD.

But... luckily RK3188 differs not to much from RK3066 and we made some good steps in Genio RK3066 to get it running with CM11. At this point we have a booting RK3066 kernel 3.0.36 with CM11. Our problem right now is only the touch, a weired chip in combination with the PWM. Lets see what we get.

 

Regards

JochenKauz

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clanna777
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2014/02/06 - 13:26
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Manu rom antutu test sit down problem

ㄴdifferent ROMs + oc kernel up / antutu sit down no problem

 

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itdiy
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2014/02/08 - 05:29
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Hi ManuPC

 

Can U Tell Me How can I find the CPU GPU DDR voltage frequency table? and Replace them?

thank so much!

 

itdiy


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JochenKauz

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2014/02/08 - 15:12
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You need a hex editor for this. But be aware patching the wrong parts, you can make the kernel unusable or even brick the tablet. So you really should know what you are doing!

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itdiy
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2014/02/08 - 15:21
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JochenKauz said
You need a hex editor for this. But be aware patching the wrong parts, you can make the kernel unusable or even brick the tablet. So you really should know what you are doing!

You can modify the following way? I know it will become brick, but I want to study it!

thanks so much!

                                                                      itdiy

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JochenKauz

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2014/02/08 - 15:57
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I think I could, but I'll only do things that are safe for me and others.

It is one thing to brick my own device, a complete other thing is, to do it for someone other.

A while ago I completely bricked a Odys Q from a member with a homebrew kernel of mine, after that I said to me, never do this again without testing it before on my own device. And if I say completely brick, I mean completely. After flashing that kernel, the only thing it was worse for, was to act as a nice 250 EUR expensive plate to put whiskey glasses on.

 

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itdiy
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2014/02/08 - 16:10
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Please do not worry , if really bricked, I can Depot Repair,

I have ifive X2 tablet, and also studied its firmware, there are some other rk3066&3188 tablet,

I hoping to join you and to learn from you?can you help me?

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admin

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2014/02/08 - 16:26
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Some notions on the subjects below are probably required if you want to be able to understand what you do and safely patch the kernel like manupc did:

- hexadecimal notation and byte ordering

- C code compilation and how a source code ends up in the object/binary code

- file patching

- kernel image manipulation for Rockchip devices (checksum calculation)

 

Are you comfortable with these ?

 

Regarding the fact a tablet brick is nothing to worry about, I think it would be more responsible to assume yourself the consequence of your manipulations, I don't think it's fair nor it's not the role of a repair center...

 

Cheers.

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Oma7144, JochenKauz

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JochenKauz

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2014/02/08 - 18:44
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Regarding the fact a tablet brick is nothing to worry about, I think it would be more responsible to assume yourself the consequence of your manipulations, I don't think it's fair nor it's not the role of a repair center…

Hi,

thanks for this clarification!

You are absolutely right with this, and that is the reason I only make this on my own devices. I know the risk, and it is my risk, not something I can delegate to the manufacturer in case of failure.

The following users say thank you to JochenKauz for this useful post:

admin
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itdiy
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2014/02/09 - 05:34
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I think you're right, maybe I have to learn the job ah!

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avant
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2014/03/17 - 15:52
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Hi manupc,

as I'm happy with your overclocked kernel on the X2 and as I've switched to the mini3 retina on 2.1.0 Kasty ROM in the meantime I wanted to ask you if I could use your kernel for this tablet/ROM ?

Thanks in advance !

 

EDIT: Thanks to sbr.harry we've received a solution from fdzonerom. More infos under http://www.mobile01.com/topicdetail.php?f=605&t=3804029&last=49180667

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rb1213
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2014/03/20 - 16:51
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Hi are you planning to launch a OC KERNEL for the 2.0.2 ?

or can I use this one on Kasty's 2.0.2 ROM?

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