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General Mobile E-Tab 4 (gm-mehmet)

From postmarketOS Wiki
General Mobile E-Tab 4 (2012)
E-tab 4 front
E-tab 4 front
Manufacturer General Mobile
Name E-Tab 4 (2012)
Codename gm-mehmet
Released 2012
Hardware
Chipset Samsung Exynos 4412 Quad
CPU Cortex-A9
GPU Mali-400 MP
Display 800x1280
Storage 16GB
Memory ~1GB RAM
Architecture armv7
Software
Original software Android
Original version 4.2.2
postmarketOS
Category testing
Pre-built images no
Features
Flashing
Partial
USB Networking
No data
Internal storage
No data
SD card
No data
Battery
No data
Screen
No data
Touchscreen
No data
Multimedia
3D Acceleration
No data
Audio
No data
Camera
No data
Camera Flash
No data
IR TX
No data
Connectivity
WiFi
No data
Bluetooth
No data
GPS
No data
NFC
No data
Modem
Calls
No data
SMS
No data
Mobile data
No data
Miscellaneous
FDE
No data
USB OTG
No data
HDMI/DP
No data
Sensors
Accelerometer
No data
Magnetometer
No data
Ambient Light
No data
Proximity
No data
Hall Effect
No data
Haptics
No data
Barometer
No data


This page is WIP

There may be missing or wrong information.

Contributors

  • 19atlas

Users owning this device

  • 19atlas (Notes: android 4.2.2 is too old also device is old)


How to enter flash mode

Press Power + Volume Up to boot into recovery mode (i want to recommend using TWRP Recovery)

For fastboot, try adb reboot fastboot.

Installation

We recommend using recovery mode (ex. twrp). (see)[1]

Mainline component status

Element type Element Works? Notes
Chipset Exynos 4412
Graphics Mali-400MP4
PMIC (Regulators) max77686 Supported in mainline
Fuel gauge MAX17040 Supported by MAX17042 driver
Charger MAX8903 Supported in mainline (though no other DTSes use it yet...)
Touchscreen Focaltech ft5x0x or Atmel MXT1664S Atmel supported, Focaltech unclear (need exact model number, but should be supported by edt-ft5x06 driver?)
Display LTL101AL03 Not in mainline, but should be simple to implement
Backlight PWM backlight Can use the pwm-backlight driver.
Buttons gpio-keys Volume up/down and power button.
Audio WM8985 The codec itself is supported but we might need more to get it to work
Camera ON Semiconductor AS0260 Not in mainline,
GPS UBLOX G6010 Not in mainline
Accelerometer Bosch BMA150 Supported in mainline. Oddly enough, downstream handles it in some Yamaha-related driver (grep for YAS_ACC_DRIVER), drivers/input/misc/yas_cfg.h
Magnetometer Alps HSCDTD007/008 Downstream sources initially led to Yamaha YAS530, grep for YAS_MAG_DRIVER, drivers/input/misc/yas_cfg.h; but dmesg claims HSCDTD007/008. Either way, supported in mainline.
Light sensor ISL29023 Supported in mainline by ISL29018 driver

Some parts of this have been verified with a MEHMET_HW_VE1 [0x7] revision tablet.

See also