Google Nexus 4 (lg-mako)

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Currently the device is booting into a black screen, see pmaports#209. Help with resolving this is welcome. Please remove this note when the issue has been fixed.
Google (LG) Nexus 4
LG Nexus 4 running Weston
LG Nexus 4 running Weston
Manufacturer Google (LG)
Name Nexus 4
Codename lg-mako
Released 2012
Category testing
Original software Android on Linux 3.4
Hardware
Chipset Qualcomm APQ8064 Snapdragon S4 Pro
CPU Quad-core 1.5 GHz Krait
GPU Adreno 320
Display 768x1280 IPS
Storage 8/16 GB
Memory 2 GB
Architecture armv7
Features
USB Networking
Works
Flashing
Works
Touchscreen
Works
Display
Broken
WiFi
Xwayland
FDE
Works
Mainline
Battery
Works
3D Acceleration
Accelerometer
Audio
Bluetooth
Camera
GPS
Mobile data
SMS
Calls
USB OTG
Works



Contributors

  • ollieparanoid
  • PabloCastellano and robb4 on IRC: Workaround for red screen bug (#54)

Users owning this device


Installation

FDE (full disk encryption) seems to be broken for lg-mako currently, see pmaports#209
pmbootstrap init
pmbootstrap install
(enter fastboot, see below)
pmbootstrap flasher flash_rootfs
pmbootstrap flasher boot

To flash the kernel, you can choose pmbootstrap flasher flash kernel (but charging and power off doesn't work as expected anymore, see below).

Entering "Fastboot mode"

Hold Volume Down + Power, let go of Power once the device display does something (e.g. turns from battery icon to black screen).

Charging and power off (after flashing the postmarketOS kernel)

You don't have to flash the kernel! pmbootstrap flasher boot is also working!

You can flash the postmarketOS kernel, but instead of charging the battery, it will boot straight into postmarketOS (or the on screen keyboard to type in the password). Right now, the best way to charge it from that situation is to boot the recovery TWRP.

You can properly turn the device off by unplugging the usb cable, then booting into fastboot, then choosing power off.

Wifi

Looks like, we need to package the wcnss.* files for wifi. A version from 2015 can be found here. It's a Qualcomm chip.

Mainline

See The Mainline Kernel for a general introduction to mainlining.

power_graphic's mainlining progress is here. Read on for generic instructions of what would need to be done.

Currently we only have a downstream vendor kernel packaged, not the mainline kernel. The lg-mako has the same SoC as the asus-flo, and on the latter it is possible to run Android on a kernel close to mainline.

This means, that most peripherals of the mako should work with mainline as well, once they are enabled in the DTS file. In fact, @vetzki reported in #1079 that the mako boots when using exactly the same DTS as the one from flo (this is not recommended, as misconfiguring your device like that may damage it). SSH appears to be working for a short time before getting kicked out, the display does not work.

A good way forward would be using a minimal version of the flo DTS, where everything but USB is deleted, and fixing USB / trying to get the display working with the DSI Panel Porting Guide. The downstream DTSI files that need to be ported to the upstream kernel are probably located here, and I guess the exact panel name appears when running dmesg after a successful boot (I did not verify this). Please expand this when you're working on it, and report your progress in #postmarketOS. Check out the Mainline Guide.

Partition Layout

Partition layout:

# fdisk /dev/block/mmcblk0
Found valid GPT with protective MBR; using GPT


Command (m for help): p
Disk /dev/block/mmcblk0: 15269888 sectors, 3360M
Logical sector size: 512
Disk identifier (GUID): 98101b32-bbe2-4bf2-a06e-2bb33d000c20
Partition table holds up to 28 entries
First usable sector is 34, last usable sector is 15269854

Number  Start (sector)    End (sector)  Size       Code  Name
   1            1024          132095       64.0M   0700  modem
   2          132096          133119        512K   0700  sbl1
   3          133120          134143        512K   0700  sbl2
   4          134144          138239       2048K   0700  sbl3
   5          138240          139263        512K   0700  tz
   6          139264          184319       22.0M   0700  boot
   7          184320          229375       22.0M   0700  recovery
   8          229376          230935        780K   0700  m9kefs1
   9          230936          232495        780K   0700  m9kefs2
  10          232496          234055        780K   0700  m9kefs3
  11          234496          235519        512K   0700  rpm
  12          235520          236543        512K   0700  aboot
  13          236544          237567        512K   0700  sbl2b
  14          237568          241663       2048K   0700  sbl3b
  15          241664          242687        512K   0700  abootb
  16          242688          243711        512K   0700  rpmb
  17          243712          244735        512K   0700  tzb
  18          244736          245759        512K   0700  metadata
  19          245760          278527       16.0M   0700  misc
  20          278528          311295       16.0M   0700  persist
  21          311296         2031615        840M   0700  system
  22         2031616         3178495        560M   0700  cache
  23         3178496        15267839       5903M   0700  userdata
  24        15267840        15268863        512K   0700  DDR
  25        15268864        15269854        495K   0700  grow

Photos

See also