Digma 1538E 4G (ps1150ml)

U-Boot
Primary Bootloader	Works
Secondary Bootloader	Works
Mainline	Broken
Internal Storage
SD card	Works
USB Host
USB Peripheral
Display	Broken
Buttons

Digma 1538E 4G
	; Android running
Manufacturer	Digma
Name	1538E 4G
Codename	digma-ps1150ml
Released	2017
Type	tablet
Hardware
Chipset	MediaTek MT8735
CPU	4x Cortex-A53 1.3 GHz
GPU	Mali-T720
Display	1920x1200 IPS 10.1
Storage	32 GB
Memory	2 GB
Architecture	aarch64
Software
Original software	Android
Original version	7.0
FOSS bootloader	yes
postmarketOS
Category	testing
Pre-built images	no
Mainline	yes

This device is based on the MediaTek MT6735. See the SoC page for common tips, guides and troubleshooting steps

Contributors

km2
kedi

Maintainer(s)

Users owning this device

Kedi (Notes: Trying to get downstream from vendor)
Km2

How to enter flash mode

Use adb reboot bootloader or hold Power+Volume Down to enter fastboot mode.

Hold Volume Down when connecting to a PC if you're flashing via spflashtool.

Partition layout

PS1150ML:/ # ls -la /dev/block/platform/mtk-msdc.0/11230000.msdc0/by-name/
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 boot -> /dev/block/mmcblk0p7
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 cache -> /dev/block/mmcblk0p22
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 custom -> /dev/block/mmcblk0p17
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 expdb -> /dev/block/mmcblk0p10
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 flashinfo -> /dev/block/mmcblk0p24
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 frp -> /dev/block/mmcblk0p18
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 keystore -> /dev/block/mmcblk0p14
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 lk -> /dev/block/mmcblk0p5
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 logo -> /dev/block/mmcblk0p9
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 metadata -> /dev/block/mmcblk0p20
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 nvdata -> /dev/block/mmcblk0p19
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 nvram -> /dev/block/mmcblk0p2
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 para -> /dev/block/mmcblk0p6
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 proinfo -> /dev/block/mmcblk0p1
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 protect1 -> /dev/block/mmcblk0p3
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 protect2 -> /dev/block/mmcblk0p4
lrwxrwxrwx 1 root root  20 2015-09-01 00:04 recovery -> /dev/block/mmcblk0p8
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 seccfg -> /dev/block/mmcblk0p11
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 secro -> /dev/block/mmcblk0p13
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 system -> /dev/block/mmcblk0p21
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 tee1 -> /dev/block/mmcblk0p15
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 tee2 -> /dev/block/mmcblk0p16
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 userdata -> /dev/block/mmcblk0p23
lrwxrwxrwx 1 root root  21 2015-09-01 00:04 oemkeystore -> /dev/block/mmcblk0p12

Installation

Mainline kernel?

This device is based on MT8735W chipset.

Part	Supported?
SoC(MT8735W)	Broken/Partial
K101-MM2BA02-A panel	No
Sandisk sdinadf4-32g EMMC chip	Yes
GalaxyCore GC5025 Back camera	No
GalaxyCore GC2365 Front camera	No
MT6328 PMIC	No
MT6625L BT/Wifi chip	No
MT6169 maybe LTE	No
MT6158 RF	No
NTC3201 Temperature sensor	No
GSL3676 touchscreen chip / CY101S200-01 touch panel	No

UART

On the board, next to the reset button, there are 4 pins: Tx1, Rx1, Tx0, Rx0. With Tx0 I was able to get the bootloader messages. Listen at a speed of 921600

Size of UART pins. Use thin copper wire and connect to Tx0 Rx0.

Mainline status

Still in its infancy. Simple-framebuffer and UART partially works. https://github.com/mt6735-mainline/linux

Photos

Front side
Back side
Battery
Motherboard
NFC connector