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u-boot / omap4boot for P920/P720/P940 and its variant

Optimus 3D Android Development - xda-developers - forum.xda-developers.com
cross post from

I have only KU5400(the same hardware spec of SU540)

but I can port the omap4boot / u-boot for SU760/SU870 with others help.

LG Prada 3.0 is very similar with the P920/SU760 and P720/P725/SU870

So I cross post it in this dev section.

Now SU540/SU760/SU870 are unbrickable with this omap4boot + u-boot,

and with the new ported u-boot you can even change your kernel too!

Quote:

Originally Posted by milaq

thanks for the headsup. any of such is much appreciated (as many stuff for the prada is in korean, chinese, etc.)

these are the opensource gpl components for the ku5400 (which essentially is the p940 for the eastern market). you can get the zips for the p940 here

this includes the kernel sourcecode which allowed me to build e.g. the cifs. module.

unfortunately we are still st(r)uck with an encrypted bootloader. therefore it is not possible to boot any custom kernel atm.

Now it is possible

from

Quote:

Originally Posted by wkpark

Quote:

Originally Posted by wkpark

Currently Im working on "Unbrickable Optimus 3D"

LG accidently leaked the RSA keys of the P920/SU760 and the signing tool

in the GB source.

(I guess the leaked RSA keys could be the reference keys of the TI signing tool)

so I can signing it's x-loader / u-boot etc.

the leaked RSA keys are used by Prada3.0(SU540 model), P920, SU760, SU870(Korean version of Optimus 3D Cube known as P720)

and the omap4boot port of the Prada3.0 working nicely with the new u-boot based on the SU760/SU870 u-boot source.

(written in Korean)

Finally, the omap4boot port of SU760/SU870 + u-boot port of SU760/SU870 works nicely!!

(written in Korean)

Instruction

Please see also

(this method does not recover from broken bootloader at all)

1. Install OMAP4430 USB driver

If you plug your Phone on PC without battery, OMAP4430 device appeared for seconds and then disappeared.

2. start start_fastboot.bat using the omap4boot + u-boot (win32 port of omap4boot included)

1. Turn off your Phone, pull out battery.

2. start "start_fastboot.bat" (it will waiting until phone connected)

3. connect USB cable, the usbboot will start

4. insert battery while the usbboot is waiting

5. unplug USB cable the LG logo will appeard and the fastboot started.

If you have some time please test it with your phone.

Im not sure It is working for P940

just test it and report about it. it is almost there to unlock change your bootloader(lk bootloader) to the new u-boot bootloader

to circumvent locked booloader.

original post from (in Korean)

you can get the latest omap4boot + signed u-boot from.
Date: Nov 8, 2012   



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