Blacklist of locked Down Version´s of RK3188 CPU

[neomode]

Here is a Little Program to check if the CPU is a T Model or not.
Please Test it.
Thx.

Neomode


Removed app not Work as Should, make a new one.

[d33]

Blacklist of locked Down Version´s of RK3188 CPU

maybe this is because of CPU overclocking - when CPU is runing on full speed it cuts something somewhere to avoid from overheating ?!

There exists some reasonably complicated code to back off CPU frequency in an overheating scenario but the temperature sensor appears to be unused!


Using my ipad so apols for any stupid ios spelling 'corrections'

[mikele]

Beta KiTkAt

maybe this is because of CPU overclocking - when CPU is runing on full speed it cuts something somewhere to avoid from overheating ?!

@d33

Today KiTkAt is in Beta stage. When the final build come, can we still use this Kernel for T models ?

[valzja]

d33, i found problem with your first build kernel 1.6ghz what i used - after ~15min of movie in XBMC my wifi drops in speed dramatically... only wifi turn off and turn on fix this... before starting to watch i have 11mbps, after 15mins of watching it drops to 0.6, but after off/on operation everything is back.

maybe this is because of CPU overclocking - when CPU is runing on full speed it cuts something somewhere to avoid from overheating ?!

[d33]

Ho d33 , I have a cs968 device and I'm asking you nicely if you can make me some modified kernels from the one that I'm using now to test them out on my rk3188T cpu. Here is the kernel from an 2.08 bootloader image running android 4.2.2 version . I have tried the ones already created with the google tv logo with no success . Also if you can make also a undervolted version in case the higher frequency dosen't work for me at least to have it as cool as possible on that 1.416 ghz. the kernel is here : http://fbx.ro/ovo5kq2h3javmssz

Thank you in advance ,

Mike ,

i dont have 4.2.2 source to work with sorry.


however if you could provide your devices leakage level from dmesg output that would help us (or the whole DMESG if you can't spot it)

[JDfense]

d33,
What do you think about one last kernel set with 1,4 CPU clock and slightly overclocked RAM and GPU?

JDfense --->I8160

[scooter2014]

Most companies selling the T version are being mum on anything they choose the cheaper chip and sales will show it for them. I wonder if rockchip told them or if they simply said its just for TV box not tablet. Either way its a cluster bucket for end users. D33 and the rest hats off to your efforts maybe one day rockchip will see why released codes help Thier sales and image!!!!

[Magnus33]

I don't have a 'T' chip to test on but my thoughts are similar to your sentiment.

Whilst it seems it is possible for some T-Chip owners to eek a little extra perfomance it seems inconsistant and unstable. Probably best to either look for a 'real' RK3188 or look elsewhere.

I'll keep an eye out on this thread to see if anyone else posts CPU/Leakage level reports to see if a pattern presents itself and I've already passed on the 'overrides' to the other devs to use if they want. However, given the inconsistancy I think the forum would blow up with the millions of variants we'd need to build.

There some of us with T cpu that can overclock fantastic but that due to it being one from the center of the plater when it made and there not going to be many of those.

I got lucky but its a raw deal for most and its only work of you and the others that's giving them a stable stick.

[mikele]

Two additional kernels:

1.6 with fast RAM with desktop 1920x1080
1.7 with fast RAM with desktop 1280x720

NB. the kernels are not "720p" or "1080p" the resolution just describes the desktop. It is the HDMI settings that describe the frame rate and res set to the TV

Thanks d33.

I have strips on screen and freezing with FAST RAM 1.6GHz 1080p

At this time 1080p with 1.6GHz is perfect but I'm sure If you build 1.6GHz 720p and fast ram this will be fine for me. If you have time...

For now I enjoy my 1080p 1.6GHz and I thank you so much for that

[d33]

Just be happy if he finds best solution for being stable without buggy screens
Thinking 3188T chips are cursed may start looking for only 3188 chipset devices.

I don't have a 'T' chip to test on but my thoughts are similar to your sentiment.

Whilst it seems it is possible for some T-Chip owners to eek a little extra perfomance it seems inconsistant and unstable. Probably best to either look for a 'real' RK3188 or look elsewhere.

I'll keep an eye out on this thread to see if anyone else posts CPU/Leakage level reports to see if a pattern presents itself and I've already passed on the 'overrides' to the other devs to use if they want. However, given the inconsistancy I think the forum would blow up with the millions of variants we'd need to build.

[d33]

The boot.img is not a factor. RK3188T and RK3188 react differently with same kernel/boot.img builds.

I think what Neomode has seen is that missing the final "600" off the init line on a particular ROM build limits the GPU maximum clock.

It is not the reason that the frequencies are throttled by ~75% across the range.

Read back and you can see my previous post listing the coded values, the actual values translated for a standard CPU and the odd ones for a 'T' CPU

[leolas]

Re: Blacklist of locked Down Version´s of RK3188 CPU

Y

I have something find out about GPU Overclocking.

Right now I am making a Rom for the MK902. I have overlooked the Kernel with the Tool from pjhanderson. I have got a 1,6 GHz Kernel with GPU Set to 600 MHz.
Then I Flash the Rom and see I only get 466 at max for the GPU, then I found out how to fix it.

In the Boot.img is the init.rc there is a Line for the Mali Freq.
There you can set the Overclock!

insmod /system/lib/modules/mali.ko mali_dvfs=150,200,233,260,300,466,600

The Freq must be the same as in the Kernel.
This Works !
Before i get a Antutu 3D of 2000 now 2600.

Neomode

Great and interesting find neomode, I don't have any T model, so I can't work on it testing in the device, but in rk3188 devices, the gpu values with old kernel sources was limited at certain amount of steeps, I thought it was 6 steps, not sure now, d33, please, can you make a kernel with only 6 gpu steps? And adjust boot.img to those steps or remove the extra values added to the module:

insmod /system/lib/modules/mali.ko

In the rk3188 I have, I removed that line and antutu got the same results in gpu tests.

Sorry about be a little away of first line, and thanks a lot d33 for all your efforts to make all the work with kernel.

leolas.

[digger]

In the Boot.img is the init.rc there is a Line for the Mali Freq.
There you can set the Overclock!

insmod /system/lib/modules/mali.ko mali_dvfs=150,200,233,260,300,466,600

The Freq must be the same as in the Kernel.
This Works !
Before i get a Antutu 3D of 2000 now 2600.

Neomode

Hi neomode,
I'm interested in your finding.
Is it for 4.2. or 4.4? Or no difference?
Could you please give me little more detailed information how to do?
I think PM will be better.
Thanks

[scooter2014]

Just be happy if he finds best solution for being stable without buggy screens
Thinking 3188T chips are cursed may start looking for only 3188 chipset devices.

[rosty]

Ho d33 , I have a cs968 device and I'm asking you nicely if you can make me some modified kernels from the one that I'm using now to test them out on my rk3188T cpu. Here is the kernel from an 2.08 bootloader image running android 4.2.2 version . I have tried the ones already created with the google tv logo with no success . Also if you can make also a undervolted version in case the higher frequency dosen't work for me at least to have it as cool as possible on that 1.416 ghz. the kernel is here : http://fbx.ro/ovo5kq2h3javmssz

Thank you in advance ,

Mike ,