rk3188 tablet kernel sources

[dnkn]

So, thanks to Neomode , we have suitable kernel sources now, I've uploaded them (with some modifications to make it build) to https://github.com/dnkn/rk3188_tablet Right now there are several issues like no front cam, flash and some sensors do not work (all are recognized, but misplaced in system, I guess).Help with fixing those is highly appreciated . I don't have much time now (spent two nights for making those sources build into working kernel , a little bit exhausted now ). tried some overclocking,got 21000 in antutu , 4200 in 3dmark (3600 with stock kernel), and without any noticeable voltage increase, only ram +0.1v. 1.8ghz cpu,600mhz ddr (400 stock), 633 gpu (tried 700, it bugs, but did not try to increase voltage). and gpu stays on 594,but still real improvement in perfomance.ddr overclock makes much sense.

[leolas]

Re: rk3188 tablet kernel sources

So, thanks to Neomode , we have suitable kernel sources now, I've uploaded them (with some modifications to make it build) to https://github.com/dnkn/rk3188_tablet Right now there are several issues like no front cam, flash and some sensors do not work (all are recognized, but misplaced in system, I guess).Help with fixing those is highly appreciated . I don't have much time now (spent two nights for making those sources build into working kernel , a little bit exhausted now ). tried some overclocking,got 21000 in antutu , 4200 in 3dmark (3600 with stock kernel), and without any noticeable voltage increase, only ram +0.1v. 1.8ghz cpu,600mhz ddr (400 stock), 633 gpu (tried 700, it bugs, but did not try to increase voltage)

Is hard because I don't have any 3188 tablet, can you paste your dmesg?

leolas.

[dnkn]

dmesg

Here it is. It's from a little bit overclocked kernel. May be the problem with sensors is due to remotectrl module which is not present in stock kernel and it took input1. Ov2659 (front cam did not appear in dmesg,but it's built in and gpio seems to be correct).

[dnkn]

fixed cams

Fixed cams,fixed flash. Now there are some problems with compass (it is present in system,but does not report any values). Any thoughts?

Also , lightsensor does work,but auto brigtness seem not to react to changing lightning.

[giouncino]

is this kernel suitable for the PIPO m6pro?

As far as I know the M6pro doesn't have any light sensor (even if "auto" brightness can be activated).

[d33]

Oh how interesting. Will be nice to see what can be achieved. My wish list would mild over clocking of CPU, ram and GPU with 1080p24 and full channel sound pass through to HDMI

Watching with interest

Sent from my M8HD using Tapatalk

[leolas]

Re: rk3188 tablet kernel sources

Fixed cams,fixed flash. Now there are some problems with compass (it is present in system,but does not report any values). Any thoughts?

Also , lightsensor does work,but auto brigtness seem not to react to changing lightning.

Good work, step by step you are getting it!!! That is the way!!!

leolas.

[rrileypm]

This is some very interesting stuff, but way over my head.

If there is anything I can do to help test any kernels you produce, please let me know.

I have:

M8 Pro
M7 Pro
and an M6 Pro on order

I've discovered that the M7 Pro, M9 Pro, M6 Pro and M8HD all run basically the same system, just different kernels. I can boot each of the ROM's on my M7 Pro running the M7 Pro kernel. I had to order an M6 Pro because the screen resolution is so big, I couldn't fit the screen on my little M7 Pro.

Kernel wise, I've had requests for slight overclocking...the video playback fix (implemented in many of the TV stick kernels), and HDMI stuff like passthrough capability.

Do you think we can do this for the Pipo 3188 tablets?

Also, with this new information, can we continue providing Android updates beyond what Pipo decides to update themselves? For instance going to 4.3 or 4.4?

I'm just wondering what all this means.

[leolas]

Re: rk3188 tablet kernel sources

To overclock a little the tablet and more you can try

http://www.FreakTab.com/showthread.php?p=97975

This kernel sources can help while rockchip maintain it without great changes.

About build a kernel without the physical device, is very hard on sticks, more difficult in a tablet, there is more hardware to adjust, touch screen, LCD, compass, light sensors, cameras, etc...


leolas.

[dnkn]

update

Well , I got everything working,overclocked to 1.8ghz (this freq was advertized to us,so no overclock ) ddr 667 at 1150mv works so far (+0,050mv to stock voltage,running 396mhz),gpu untouched. tried gpu 768mhz,got no noticable effect , ddr overclock brings more effect.

There are 2 bugs. First one is audio is too loud,have to set ~50% volume , second is device sometimes hangs/power off in sleep. That happens to some users on stock kernels, not sure what causes it,but my guess is ddr voltage for min freq,it's 950mv for 198 mhz in stock,that is too much (it runs 396mhz on 1100 and 300 on 1000) I guess rockchip overvolted that suspend freq to avoid such freezing in sleep. I'm testing 166mhz sleep freq with 925mv.

As for the sound , anyone has any guess where are those parameters to lower the volume? The easy way is to use some eq apps like viper4android and lower the volume,but prefer to make it kernel way.

And some bench results. Flashed RileyRom 2.0 (it did not boot with my kernel and kernel from 1.9,but did boot with its kernel,after 1st boot I flashed my kernel and everything looks fine now,don't know what caused it not to boot if included in initial flash).
antutu ~22000,18500 stock
3dmark ~4200,3700 stock.ice storm extreme ~3100,2600 stock
epic citadel 49! fps , 38 stock.
that is on 1.8ghz,667ddr,gpu untouched (no reason).

Will test kernel for not freezing in sleep and push changes to github. Those sources on github as for now will build into working kernel,but will lack flash,front cam and may be some sensors.

As for different models, I can try,but it's very hard. I need to know gpios,i2c addresses of peripherals. But there are configs for various devices,also screen configs for cube gt2 (1920x1200),9.7" retina,ipad mini 7.9" so it is possible,but needs investigation. It can be investigated on device running stock kernel,but without it... just blind poking in the skies

As for power consumption. I can not estimate it for now,cause hundreds of reboots,benchmarks and so on. But it does not seem to be way bigger.

[leolas]

Re: rk3188 tablet kernel sources

Really a good work!!! Thanks a lot for share it

leolas.

[dnkn]

This is some very interesting stuff, but way over my head.

If there is anything I can do to help test any kernels you produce, please let me know.

I have:

M8 Pro
M7 Pro
and an M6 Pro on order

I've discovered that the M7 Pro, M9 Pro, M6 Pro and M8HD all run basically the same system, just different kernels. I can boot each of the ROM's on my M7 Pro running the M7 Pro kernel. I had to order an M6 Pro because the screen resolution is so big, I couldn't fit the screen on my little M7 Pro.

Kernel wise, I've had requests for slight overclocking...the video playback fix (implemented in many of the TV stick kernels), and HDMI stuff like passthrough capability.

Do you think we can do this for the Pipo 3188 tablets?

Also, with this new information, can we continue providing Android updates beyond what Pipo decides to update themselves? For instance going to 4.3 or 4.4?

I'm just wondering what all this means.

hdmi passthrough is present on sticks I guess,but they use different hdmi chip I guess (m9
has cat66212,sticks use it66121,don't know what is the difference,need to look in sources).

Android 4.3 and so forth is possible but it will require writing all device specific stuff for android to communicate with kernel. I guess OMA has done some,or he uses blobs from stock,do not know.

Also picuntu is really possible now, afaik,there are some minor changes to the kernel needed to make it work. But no video accel for now. I'm kinda new to all this picuntu stuff,but read it somewhere. BTW may be this can be helpful https://github.com/HermanChen/Rockch...4.2_jb_release
And ubuntu touch is possible,but it's not ready yet.

[d33]

What are you testing on? M8 Pro / M9 I guess if you are using a 2.0 ROM. I may give it a try on my M8HD if you provide a pre-compiled kernel .img on GIT. The one in the repository appears to be 3 days old. Also have you tested out 3G?

[dnkn]

I'm using m 9 max (1280x800 screen). I can build image for other device, but I need to know what screen config to choose and there maybe some sensors missing.

[d33]

I'm using m 9 max (1280x800 screen). I can build image for other device, but I need to know what screen config to choose and there maybe some sensors missing.

Would DMESG output help?