Meizu Pro 5 (meizu-turbo)

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Revision as of 07:13, 23 December 2018 by Elelel (talk | contribs) (Kernels)
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Meizu Pro 5
[[|200px|alt=Meizu 5 Pro]]
Meizu 5 Pro
Manufacturer Meizu
Name Pro 5
Codename meizu-turbo
Released 2015
Original software Android 5, Ubuntu Touch
Hardware
Chipset Samsung Exynos 7420 Octa
CPU Octa-core (4x2.1 GHz Cortex-A57 & 4x1.5 GHz Cortex-A53)
GPU Mali-T760MP8
Display AMOLED, 16M colors
Storage 32GB/64GB
Memory 3GB/4GB
Architecture aarch64
Features
USB Networking
Works
Flashing
Partial
Touchscreen
Display
Broken
WiFi
Xwayland
FDE
Mainline
Battery
3D Acceleration
Accelerometer
Audio
Bluetooth
Camera
GPS
Mobile data
SMS
Calls
USB OTG



Contributors

elelel

Maintainer(s)

How to enter flash mode

The device has to be with unlocked bootloader. Android phone version has bootloader locked by default. Locked bootloader may be unlocked with a Beta FlymeOS image for the international phone version. International firmware can be flashed to Chinese phone if one changes phone's id (possible with a 5.1.x Chinese firmware, root and a hex editor).


Press volume down and power while turning on to get into fastboot mode.

Installation

Current pmbootstrap utility assumes that boot partition is always named 'boot' on fastboot devices. This device's boot partition has 'bootimg' label. Because of that boot partition must be either flashed directly with fastboot utility, or pmbootstrap config source code has to be fixed.

Status

Currently when turned on, the device enters reboot loop. The reboot is triggered by the line:

udevadm trigger --type=devices --action=add

The device is accessible with telnet hook and via SSH (after additional procedure)

Procedure to get the device booting till the SSH

Install PostmarketOS's telnet debug hook, log on with telnet, then execute:

. init_functions.sh
mount_boot_partition
extract_initramfs_extra /boot/initramfs-*-extra
start_charging_mode
wait_root_partition
resize_root_partition
unlock_root_partition
resize_root_filesystem
mount_root_partition
mount -o remount,rw /dev/mapper/sda41p2 /sysroot
mount -t proc proc /sysroot/proc
mount -t sysfs sys /sysroot/sys
chroot /sysroot


In chroot, comment out the offendig string, e.g. with sed replace.

Getting the display to render frames

Using MartinBraam's trick it is possible to make the display render frames like this:

while [ ! ]; do cat /sys/class/graphics/fb0/modes > /sys/class/graphics/fb0/mode; done

See https://github.com/postmarketOS/pmbootstrap/pull/66#issuecomment-306343779

Development notes

Kernels

There are several candidate kernels for the port:

  1. Official kernel sources
    1. Android branch. This branch seem to contain the very first kernel used for the earliest FlymeOS 4.x ROM. It is reported to be uncomplete, in particular, it misses Meizu proprietary sources for power management.
    2. Ubuntu branch. This branch seem to contain kernell for Android release updated to 3.10.100 in commit f866ad068f11fb5e68ff87901346483945972ae9. After that Ubuntu-specific patches as well as generic bugfixes come.
    3. Android 7 kernel, not released. Kernels from previous two links were only used in very early official ROMs. Later kernel sources were not realeased. There is a Github issue requesting the release. Meizu is known to respond positively to such issues.
  2. Unofficial sources
    1. UBPorts kernel. Based on Meizu Pro 5 branch. Contains Ubuntu Touch fixes and ports, mainly Android binder and anbox-specific patches.
    2. faust93's kernel. Kernel used in at least two unofficial Android roms. This kernel, probably based on CM14.1, seems to be most up to date candidate, but contains a lot of patches from assorted sources and may be not very stable


See also

Initial merge request