KT2 override diags_kernel and erased emmc, what to do next?

[stoney_stone]

TL,DR. Device is KT2. Trying to make it a smart screen to display weather or todo list. I think I need to use wifi, python and eips command. Tried to jailbreak it, but made some mistakes, emmc has been erased. Tried to downgrade it with 5.8.7 and succeeded. But still cannot do bootm 0xE41000. Then erased it again and re-install, but failed because of replacing diags_kernel with uImage by mistake. Do I really need to install a full kindleOS for making it work like a smart screen supported by python? If I need, what should I do next?

Hi comrades, it’s my first time to make a post, hope that I don’t forget anything. If there is any problem, plz let me know. Thank you for your patience.

I’m trying to make my kt2 a smart screen as a birthday for my friend. At the beginning, it’s 5.12.2. So tried to jailbreak with serial debug. But erased emmc by mistake. Then, successfully installed 5.8.7 with export FAT partition and update using update*.bin file on FAT partition.

It was too late, about 2 am, so I went to bed. When I unlock the screen next morning, I found it was upgraded to 5.12.2 because I forget to disconnect wifi. Thank you Amazon. And I tried bootm 0xE41000, can’t get kernel image. So, I erased it again for downgrading. While re-installing 5.8.7, I replaced build-in diags_kernel with uImage in .bin file of 5.8.7. Then, I cannot re-install 5.8.7 like before.

I found one comrade said .bin file contains everything needed except diags_kernel. And I don’t find compatible .img files for my KT2 so far. So, have no ideas what to do next, hope you guys can give me some guidance. Thank you, comrades!

Here is some information about my kindle:

recover menu:

Spoiler:

Menu
====
3. Load MMC0 over USB storage
4. Erase MMC0
I. Initialize Partition Table (fdisk) and format FAT
O. Format and overwrite FAT partition
E. Export FAT partition
U. Update using update*.bin file on FAT partition
M. Update using update*.bin file on FAT partition of second MMC port
D. dmesg / kernel printk ring buffer.
Q. quit
Choose: 10 /
Menu timeout
BOOTING DEFAULT.
IP-Config: no devices to configure
kinit: Mounted root (ext3 filesystem) readonly.
[ 15.338848] EXT3-fs error (device mmcblk0p1): ext3_lookup: deleted inode referenced: 11171
[ 15.347614] EXT3-fs error (device mmcblk0p1): ext3_lookup: deleted inode referenced: 10576
[ 15.357500] EXT3-fs error (device mmcblk0p1): ext3_lookup: deleted inode referenced: 10576
kinit: init not found!

u-boot info:

Spoiler:

HW



U-Boot 2009.08-lab126 (Sep 25 2019 - 00:37:32)


CPU: Freescale i.MX6 family TO0.0 at 996 MHz

Temperature: 36 C, calibration data 0x5b95385f

mx6sl pll1: 996MHz

mx6sl pll2: 528MHz

mx6sl pll3: 480MHz

mx6sl pll8: 50MHz

ipg clock : 66000000Hz

ipg per clock : 66000000Hz

uart clock : 80000000Hz

cspi clock : 60000000Hz

ahb clock : 132000000Hz

axi clock : 198000000Hz

emi_slow clock: 22000000Hz

ddr clock : 396000000Hz

usdhc1 clock : 198000000Hz

usdhc2 clock : 198000000Hz

usdhc3 clock : 198000000Hz

usdhc4 clock : 198000000Hz

MMC: FSL_ESDHC: 0,FSL_ESDHC: 1,FSL_ESDHC: 2

Board: Bourbon PREEVT2 WFO

Boot Reason: [ POR ]

Boot Device: NAND

Board Id: 0620601144420FFY

S/N: 90C6060644440XWX

I2C: ready

DRAM: 256 MB

Using default environment


In: serial

Out: serial

Err: serial

Quick Memory Test 0x80000000, 0xfff0000

POST done in 57 ms

Battery voltage: 3998 mV


Hit any key to stop autoboot: 1

uboot >