Amazon Fire 7 2019 (amazon-mustang)

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Amazon Fire 7 (2019)
Amazon Fire 7 showing the weston demo UI
Amazon Fire 7 showing the weston demo UI
Manufacturer Amazon
Name Fire 7 (2019)
Codename amazon-mustang
Released 2019
Category testing
Original software Android 7.1.1 (Fire OS 6)
postmarketOS kernel 4.9.77
Hardware
Chipset MediaTek MT8163V/B (64-bit quad-core)
CPU 4x 1.3 GHz Cortex-A53
GPU Mali-T720 MP2
Display 600x1024 IPS
Storage 16 GB
Memory 1 GB
Architecture armv7
Features
USB Networking
Broken
Flashing
Partial
Touchscreen
Works
Display
Works
WiFi
Xwayland
FDE
Mainline
Battery
Works
3D Acceleration
Accelerometer
Audio
Broken
Bluetooth
Broken
Camera
GPS
Unavailable
Mobile data
Unavailable
SMS
Unavailable
Calls
Unavailable
USB OTG
Partial



Contributors

  • NoriTech

Maintainer(s)

  • NoriTech

Users owning this device


How to unlock bootloader

The bootloader can now be through a hardware method: https://forum.xda-developers.com/amazon-fire/orig-development/fire-7-2019-mustang-unbrick-downgrade-t3944365

How to enter flash mode

Press and hold Power + Volume Up

Installation

Due to the fact that fastboot doesn't work even after using the amonet exploit, you will need to export the boot image and flash it with twrp. Then flash this dummy zip which will force twrp to reapply the amonet exploit.

Another option is exporting a flashable zip that can be flashed using twrp. Refer to Installation Guide for postmarketOS

Amonet

Amonet is an lk exploit used to boot an unsigned kernel. Sources of amonet are available here: https://github.com/xyzz/amonet/tree/mustang. This exploit is installed by a bootrom exploit. But probably some 2nd stage bootloader is a good idea.

Mainlining

There is some work on mt8163 mainline, for amazon-karnak, but it will be easy to get it on mustang. For now serial console and simplefb is working. Pwrap and pmic seems to be working. https://github.com/mt8163-mainline/linux

Device problems

  • Mainline is not yet usable.
  • Panfrost (driver for mali-t720) is wip, and not avalible in downstream (Merged in linux 5.2)
  • This device use exploit due to locked bootloader. See #Amonet.
  • This device's bl is not very good for running linux, due to it appends much of bad cmdline params, and some things in device tree.

See also