kernel building mt6582....ramblings

[aus9]

ramblings as I am not organised just doing online notes to myself in no particular order

Having bought a new PC and installed Xubuntu 64 bit on it, its time to look if I can build a kernel for my phone.....mt6582



Building a Kernel from source{Mediatek}
CREDITS
######
MasterAwesome

2) one of the differences is I won't try an emulator

because I know how to mod a recovery image, I shall inject my new kernel and use mobileuncle or fastboot to flash the new recovery

--- no need to worry about kernel modules in recovery mode

3) I have already looked.....there is no config anywhere in my /proc or system files.....but I can get lsmod output off phone to see what modules are currently running on it.


now to have time to do it.....can anyone give me their spare time?
giggles

---

one of the things we need is a toolchain

EDIT
Just found out a gotcha....can't use 4.7 need to use 4.6

Code:

git clone https://android.googlesource.com/platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6

this produces a folder called.......150 Mb unpacked size
/home//arm-eabi-4.6/

and the kernel source for our cross compile stuff

Code:

git clone https://github.com/kashifmin/MT6582-KK-KERNEL.git

produces a folder called...............size unpacked is 2.4 Gb

I repeat 2400 Mb in case you think its a typo

/home//MT6582-KK-KERNEL/

[linr76]

huh, since when are MTK kernel sources open?
interesting stuff, i'd like to read more of your proceedings.
i am personally hoping to start some development of my own when Xiaomi finally releases kernel source code for MI3.

[aus9]

a quick google against phone and github produces this
[Only registered and activated users can see links Click here to register]

and don't get excited but mi2 is here
[Only registered and activated users can see links Click here to register]

is it close enough?

[linr76]

Nope mi2 is snapdragon 600 and pretty much completely different. Source for mi3 should be available until end of year.
Some efforts were already made, search cancro

[aus9]

stumbling block is a missing header.....it is not found anywhere
well not in the kernel source
here are the details and cross compile instructions so far....oh and I changed to Linaro toolchain

Code:

# commands done in same shell, no persistence at this stage
export TARGET_PRODUCT=A9CL
export PATH=/home/gordon/android-toolchain-eabi/bin:$PATH
export ARCH_MTK_PLATFORM=mt6582
export TARGET_BUILD_VARIANT=user
export TARGET_PRODUCT=A9CL
export MTK_ROOT_CUSTOM=/home/gordon/$KS/mediatek/custom/
export TARGET_KERNEL_VERSION=mt6582
export CROSS_COMPILE=arm-eabi-
export ARCH=arm
KS=MT6582-KK-KERNEL
DN=mt6582
cd $KS
cp mediatek/config/$DN/autoconfig/kconfig/platform kernel/.config
cd kernel
make prepare

# fix errors of gcc name not found
ln -s /home/gordon/android-toolchain-eabi/bin/arm-linux-androideabi-gcc   /home/gordon/android-toolchain-eabi/bin/arm-eabi-gcc

# fix missing headers
ln -s /home/gordon/MT6582-KK-KERNEL/mediatek/platform/mt6582/kernel/core/include/mach/timex.h /home/gordon/MT6582-KK-KERNEL/mediatek/kernel/include/mach/timex.h
ln -s /home/gordon/MT6582-KK-KERNEL/mediatek/platform/mt6582/kernel/core/include/mach/memory.h /home/gordon/MT6582-KK-KERNEL/mediatek/kernel/include/mach/memory.h
ln -s /home/gordon/MT6582-KK-KERNEL/mediatek/platform/mt6582/kernel/core/include/mach/irqs.h /home/gordon/MT6582-KK-KERNEL/mediatek/kernel/include/mach/irqs.h
ln -s /home/gordon/MT6582-KK-KERNEL/mediatek/platform/mt6582/kernel/core/include/mach/mt_irq.h /home/gordon/MT6582-KK-KERNEL/mediatek/kernel/include/mach/mt_irq.h
ln -s /home/gordon/MT6582-KK-KERNEL/mediatek/platform/mt6582/kernel/core/include/mach/x_define_irq.h /home/gordon/MT6582-KK-KERNEL/mediatek/kernel/include/mach/x_define_irq.h

# no more make prepare errors
make menuconfig  # no changes at this stage
make zImage

# fix zImage errors
ln -s /home/gordon/MT6582-KK-KERNEL/mediatek/platform/mt6582/kernel/core/include/mach/mt_spm_idle.h /home/gordon/MT6582-KK-KERNEL/mediatek/kernel/include/mach/mt_spm_idle.h

# unresolved error no dfo_boot.h

thanks for reading

[aus9]

ok so I found the header but its for the wrong kernel mt6572 but still no joy
make zImage fails for a related df0* object

code tidied up so its easier to reaad

Code:

KS=MT6582-KK-KERNEL
DN=mt6582

# fix errors in Linaro bin
cd /home/gordon/android-toolchain-eabi/bin
ln -s arm-linux-androideabi-ld.bfd arm-eabi-ld.bfd
ln -s arm-linux-androideabi-gcc    arm-eabi-gcc
cd ~

# fix missing headers
cd $KS/mediatek
S1=platform/mt6582/kernel/core/include/mach
L2=kernel/include/mach
ln -s $S1/timex.h        $L2/timex.h
ln -s $S1/memory.h       $L2/memory.h
ln -s $S1/irqs.h         $L2/irqs.h
ln -s $S1/mt_irq.h       $L2/mt_irq.h
ln -s $S1/x_define_irq.h $L2/x_define_irq.h
ln -s $S1/mt_spm_idle.h  $L2/mt_spm_idle.h
ln -s $S1/mt_devinfo.h   $L2/mt_devinfo.h
ln -s $S1/entry-macro.S  $L2/entry-macro.S
cd ~


# commands done in same shell, no persistence at this stage
export TARGET_PRODUCT=A9CL
export PATH=/home/gordon/android-toolchain-eabi/bin:$PATH
export ARCH_MTK_PLATFORM=mt6582
export TARGET_BUILD_VARIANT=user
export TARGET_PRODUCT=A9CL
export MTK_ROOT_CUSTOM=/home/gordon/$KS/mediatek/custom/
export TARGET_KERNEL_VERSION=mt6582
export CROSS_COMPILE=arm-eabi-
export ARCH=arm
cd $KS
cp mediatek/config/$DN/autoconfig/kconfig/platform kernel/.config
cd kernel
make prepare
# do not proceed unless no errors
# make menuconfig  # no changes at this stage
# make zImage

# unresolved error no dfo_boot.h
# google and borrow the header from mt6572
# inject it and sym link it

---

I can not edit first post, but that is not important

If you are on Linux there are a number of Linaro toolchains to choose from

I chose the simplest cos I am a simple person .....giggles

[Only registered and activated users can see links Click here to register]

click on d/l link = android-toolchain-eabi-4.9-2014.07-x86.tar.bz2

good luck

---

now we look to see if we can choose a different custom kernel within the kernel source

eg

#ifndef __ARCH_ARM_MACH_MT6575 visible from
/home/gordon/MT6582-KK-KERNEL/mediatek/custom/bird82_tb_td_a_kk/kernel/core/src/board-custom.h

mine is mt6582 so we can't use that one

2) Can't use same pathway for next kernel
but
/home/gordon/MT6582-KK-KERNEL/mediatek/custom/banyan_addon_x86/factory/init.rc

contents includes
chmod 0777 /dev/mt6516
and
mount yaffs2 mtd@system /system

Nope....my partition does not use yaffs nor do I have such dev

3) other one is also not mine as this pathway exist
/home/gordon/MT6582-KK-KERNEL/mediatek/custom/common/kernel/wifi/mt592x/

so I can't use "common" in my export pathway

I am no closer than before but I have eliminated all but mt6582 as potential custom kernel configs

grrrrrrrrrrr

[rdsp87]

Hi.. i compiled with this command

./makeMtk bird82_tb_td_a_kk n k

but error for this
make[2]: *** [sub-make] Error 2
out/target/product/bird82_tb_td_a_kk/obj/KERNEL_OBJ/kernel_bird82_tb_td_a_kk.bin does NOT exist!


how ti fix ?

[lovely]

Please my mobile lenovo a328 mt6582 KitKat kernel I have update lolipop kernel please guide

[greenlang]

Hi，aus9:
Do you have solved these build errors, now. Could you share some experience about this MT6582 Source code building, or if there are some other solution on MT6582 platform.