[device-port] [santoni] Xiaomi Redmi 4X

[bitrvmpd]

Tree: halium-7.1

• Create manifest - santoni
• Boot image and system image build successfully
• Device boots into rootfs, usb: Manufacturer: GNU/Linux Device appears in dmesg on host.
• LXC container starts and does not crash
• libhybris tests
  • test_gps
  • test_hwcomposer
  • test_lights
  • test_vibrator
  • test_wifi
  • test_sensors
  • test_audio
  • test_camera
  • test_input
  • test_nfc (not avaliable)
  • test_recorder

Troubleshooting:

• libnativehelper ScopedPthreadMutexLock.h missing
  Added manually in libnativehelper/include/nativehelper download here.
  Maybe I'm missing a project in my manifest.xml?, I know there must be a better way to fix this.
  It was, Halium/android was missing android_libcore repo Add libcore android#17
• signapk.jar was missing/not found
  Fixed by removing all .apk/.jar references inside proprietary-files.txt in device tree Loup-ROM/android_device_xiaomi_santoni@28243c1
  Loup-ROM/android_device_xiaomi_santoni@4d16924
• failed to allocate "X" blocks, out of space?:
  error: ext4_allocate_best_fit_partial: failed to allocate "X" blocks, out of space?
  fixed after using this patch Make system.img the right size for the device halium-scripts#4
• lxc crashing, /var/lib/lxc/android/rootfs Input/output error
  fixed after removing f2fs support in device tree Loup-ROM/android_device_xiaomi_santoni@07c073b
• pm-service, dmesg being flooded with this:
  kernel: IPC_RTR: msm_ipc_router_bind: pm-service Do not have permissions
  fixed by applying this patch to the kernel Halium/android_kernel_lge_bullhead@a34bb3a...0b64b0c
  and adding pm-service to net_raw group Loup-ROM/android_device_xiaomi_santoni@46d4423
• wifi
  for wifi to work I had to run this: echo sta > /sys/module/wlan/parameters/fwpath
• Device reboots while installing a different rootfs: Installing a different rootfs (plasma,ubports,etc) causes a reboot because the extraction process fills all the RAM, so the installation never finishes. Sending a different busybox binary doesn't help.
  The solution is to add a swap device temporarily and reduce the aggressiveness of the LMK.
  Add these lines before echo "transfering rootfs tarball ... " in halium-install script

# Check if we have a swap device enabled
if [ $(do_shell "cat /proc/swaps | wc -l") -lt 2 ]
then
    echo "Enabling swap device"
    SWAP=1
    do_shell "dd if=/dev/zero of=/data/tmpswap bs=2048M count=1"
    do_shell "mkswap /data/tmpswap"
    do_shell "swapon /data/tmpswap"
    # We need to low the aggressiveness of LMK so the device doesn't reboot.
    echo "Reducing LowMemoryKiller agressiveness"
    do_shell "echo 9999 > /sys/module/lowmemorykiller/parameters/adj"
    do_shell "echo 1 > /sys/module/lowmemorykiller/parameters/minfree"
fi

Then add these inside cleanup_device function to remove the swap file.

if [ -n "$SWAP" ]
then
    do_shell "sync"
    do_shell "swapoff /data/tmpswap"
    do_shell "rm -rf /data/tmpswap"
fi

Sources

• fixup-mountpoints: [santoni] Add Xiaomi Redmi 4X to fixup-mountpoints mer-hybris/hybris-boot#131
• kernel: https://github.com/bitrvmpd/msm-3.18/tree/halium-7.1
• device tree: https://github.com/bitrvmpd/android_device_xiaomi_santoni/tree/halium-7.1
• vendor tree: https://github.com/Nikesh001/android_vendor_xiaomi_santoni/tree/cm-14.1

[lnjX]

Please dont fork the vendor repository, just remove the apk and jar references in proprietary-files.txt then rerun halium devices setup, it'll regenerate the vendor makefiles.

[bitrvmpd]

I will update the manifest when theMuppets have the vendor tree for this device, as of now they don't.

[lnjX]

It doesn't has to be from TheMuppets, just take the original repository, you've forked: https://github.com/Nikesh001/android_vendor_xiaomi_santoni/tree/cm-14.1.

[bitrvmpd]

Done Halium/halium-devices#59

[000exploit]

halium-boot doesn't boot a different rootfs.