[Xiaomi Mi Pad ROMs, Kernels, Recoveries, & Other D] highwaystar_ru:
Here is first attempt to build LineageOS 14.1 for XiaoMi MiPad

Current state is: mostly working

I finally found solution to fix old mipad stock graphic blobs to load on cm13 and Los 14.1. This build is proof of concept to show it is possible to have Nougat on old good MiPad.

What working:

WiFi (better than 12.1, now using opensource wpa_supplicant)

Sensors (autorotation works)

LEDs

audio including microphone

hardware accelerated video playback

camera

What not working:

audio (currently plays only some system sounds, all other failed because of wrong PCM format)

camera

[*]lineage Music add doesnt play anything (3rd paty players seems to work fine)

[*]windevine drm not working (need updated liibs, to be done in next build)

[*]probably hardware acceleration playback (missed symbols for some omx libs)

[*]not enough space to install gapps into /system partition

[*]random crashes going to system ui restart loop

webview crashing with ERROR:gl_fence_egl.cc(63)] Failed to wait for EGLSync. error:EGL_BAD_MATCH (gapps and play market unusable)

Github links:

Device tre (cm-14.1 branch)

Vendors blobs (cm-14.1 branch)

Kernel (cm-14.1 branch)

2017-02-16

Download:lineage-14.1-20170216-UNOFFICIAL-mocha.zip

Changelog:

Initial release

2017-02-20

Changelog:

Audio fixed

Using patched webview, gapps should work now

SD card and usb mounting fixed

Download: lineage-14.1-20170220-UNOFFICIAL-mocha.zip

2017-02-26

changelog:

random crashes and black screens resolved

new Audio HAL based on opensource tinyhal (microphone works now)

big system partition (1.2Gb). You have to install it on merged system1 and system2, if you have already merged just install.

SD card mount fix included (access to SD card from all apps)

hardware accelerated video playback now works

cleaned some useless blobs like powerservice daemon

updated wifi firmware

Download:lineage-14.1-20170226-UNOFFICIAL-mocha.zip

2017-03-03

Changelog:

Fixed mp3 and flac playback in Music app (disabled offloading since it broken for mp3 and enable ffmpeg for other formats)

Updated wvm libs, Widevine DRM L3 now works

Download: lineage-14.1-20170303-UNOFFICIAL-mocha.zip

2017-03-11

Changelog:

KeyDisabler (alow to enable navbar and disable hardware buttons)

Vibrator intensity control

hwui props in build.prop makes screen more stable in browsers (black pixels on screen issue)

Updated LED capabilities (RGB notification, settings for battery and notification colors, button backligth brightness)

Userspace cpuquiet governor by default. Looks like this is best option to get smooth playback. (cores dosnt switches off but only changes its freq)

Fixed offline charging mode. Now shows animaton with current battery level. Also previous 14.1 builds cant be offline charged from PC USB port, now this issue resolved

return glcomposer compositor. Now looks stable, it should be because of hwui right props added. *broken*

Download: lineage-14.1-20170311-UNOFFICIAL-mocha.zip broken

2017-03-12

composer changed back to surfaceflinger. Solves issues with blck screen or reboots in 20170311 build

Download lineage-14.1-20170312-UNOFFICIAL-mocha.zip

2017-04-21

test version with Nexus 9 blobs

webview slow work resolved with new graphic blobs

Browser replaced with Gelllo

lineage code updated up to 7.1.2

Known issues:

Bluetooth broken

Doesnt load proper mac address

Some graphic issues in general user interface

Download: lineage-14.1-20170421-UNOFFICIAL-mocha.zip

Download fixed boot.imgboot-20170429.img - fixes wifi and bluetooth issues on 2017-04-21 lineage 14.1 build.

2017-05-02

Changelog:

camera works now

Browser replaced with Gelllo

lineage code updated up to 7.1.2

Known issues:

this build still uses old graphic blobs, so webview apps is laggy.

if camera doesnt work after dirty flash try to delete /data/nvcam folder from adb root console or root file manager

Download: lineage-14.1-20170502-UNOFFICIAL-mocha.zip

Webview apk is one patched to work on broadcom GPU with same problem as ours: https://github.com/manumanfred/android_external_chromium-webview

2017-09-11 NEW!

Changelog:

Lineage OS 14.1 sources updated

Webview updated and rebuilt with only changes necessary for Mi Pad. Most of webview related issues now resolved. Faster and smoother scrolling in webview based apps, some apps now startings works, like Gogle Books. See webview patch applied below.

device tree cleaned for proper work with proprietary blob files. Now they can be extracted from stock rom or device and makefiles can be properly generated in vendor.

Using opensource version of libbt-vendor - maybe some changes in bluetooth perfomance.

Download lineage-14.1-20170911-UNOFFICIAL-mocha.zip from Google Disk or from MailRu mirror

Webview patch applied:

diff --git a/gpu/config/gpu_driver_bug_list.json b/gpu/config/gpu_driver_bug_list.json
index b8f5489ce086..6bf7f9250237 100644
--- a/gpu/config/gpu_driver_bug_list.json
+++ b/gpu/config/gpu_driver_bug_list.json
@@ -1,6 +1,6 @@
{
"name": "gpu driver bug list",
- "version": "10.93",
+ "version": "10.94",
"entries": [
{
"id": 1,
@@ -2542,6 +2542,19 @@
"features": [
"rely_on_implicit_sync_for_swap_buffers"
]
+ },
+ {
+ "id": 236,
+ "description": "MiPad Nvidia drivers g_ignore_egl_sync_failures work around",
+ "cr_bugs": [123456],
+ "gl_vendor": "NVIDIA.*",
+ "machine_model_name": ["MI PAD"],
+ "os": {
+ "type": "android"
+ },
+ "features": [
+ "ignore_egl_sync_failures"
+ ]
}
],
"comment": [

special patched webview prebuilts located here https://github.com/HighwayStar/android_external_chromium-webview (branch cm-14.1-mocha)

Merge partitions

Mi Pad by default has 2 /system partition, each 640Mb. It is not enogh to install LineageOS and Gapps. To install 2017-02-25 build and newer you have to merge 2 system partition in one 1.2Gb system partition. To dod this follow instruction http://en.miui.com/thread-118294-1-1.html

Root Access

If you want root access flash addonsu-arm-signed.zip from https://download.lineageos.org/extras

XDA:DevDB Information

LineageOS 14.1 for Xiaomi MiPad (mocha), ROM for the Xiaomi Mi Pad

Contributors

highwaystar_ru, highwaystar_ru

Source Code: https://github.com/HighwayStar/android_device_xiaomi_mocha

ROM OS Version: 7.x Nougat

ROM Kernel: Linux 3.10.x

Based On: CyanogenMod, LineageOS

Version Information

Status: Alpha

Created 2017-02-16

Last Updated 2017-09-11