Xiaomi Mi Pad (xiaomi-mocha)

U-Boot
Primary Bootloader Whether it is possible to replace stock bootloader with U-Boot.	Works
Secondary Bootloader Whether it is possible to chainload U-Boot from stock bootloader.	Works
Mainline Whether latest upstream versions of U-Boot are not broken and it is possible to use them.	Works
Internal Storage Whether it is possible to boot from internal storage (e.g. eMMC or UFS).	Works
SD card Whether it is possible to boot from SD card.	Works
USB Host Whether it is possible to boot from a USB storage or connect a keyboard.	Broken
USB Peripheral Whether it is possible to use device as a peripheral in U-Boot, e.g. for fastboot mode.	Works
Display	Partial
Buttons Whether it is possible to navigate in boot menu or grub with volume and power buttons.	Works

Features
Flashing Whether it is possible to flash the device with pmbootstrap flasher.	Works
USB Networking After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).	Broken
Battery Whether charging and battery level reporting work.	Works
Screen Whether the display works; ideally with sleep mode and brightness control.	Works
Touchscreen	Partial
Multimedia
3D Acceleration	Broken
Audio Audio playback, microphone, headset and buttons.	Broken
Camera	Broken
Connectivity
WiFi	Works
Bluetooth	Broken
Miscellaneous
FDE Full disk encryption and unlocking with unl0kr.	Untested
USB OTG USB On-The-Go or USB-C Role switching.	Untested
Sensors
Accelerometer Handles automatic screen rotation in many interfaces.	Untested
Magnetometer Sensor to measure the Earth's magnetism	Untested
Ambient Light Measures the light level; used for automatic screen dimming in many interfaces.	Partial
Proximity	Untested
Hall Effect Measures magnetic fields; usually used as a flip cover sensor	Untested
Power Sensor Sensor to monitor current, voltage and power. Not fuel gauge!	Untested

Xiaomi Mi Pad
	; Xiaomi Mi Pad
Manufacturer	Xiaomi
Name	Mi Pad
Codename	xiaomi-mocha
Released	2014
Type	tablet
Hardware
Chipset	Nvidia Tegra K1 (T124)
CPU	4x 2.2 GHz Cortex-A15
GPU	Nvidia GK20A (192-core Kepler)
Display	1536x2048 LCD IPS
Storage	16 GB, 64 GB
Memory	2 GB
Architecture	armv7
Software
Original software The software and version the device was shipped with.	Android 4.4.4
Extended version The most recent supported version from the manufacturer.	Android
FOSS bootloader	yes
Nura
Category	testing
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.	yes
Device package	device-xiaomi-mocha
Kernel package	linux-postmarketos-grate

This device is based on the Tegra K1.
See the SoC page for common tips, guides and troubleshooting steps

Contributors

CEllenvia

Users owning this device

CEllenvia (Notes: 64Giga, Atmel touchpad)
Clamor (Notes: pmOS with Grate kernel and U-Boot)
IonAgorria (Notes: Stock - OK)

How to enter flash mode

This port assumes you have U-Boot on your device.

Press Volume Down while plugging your tablet into your computer. After the U-Boot boot menu displays on your tablet, choose 1. Mount internal storage or 2. Mount external storage based on which storage you want to install it into with volume key. Then press Power to confirm.

Installation

After preparing your device in UMS mode with above procedures, run

$ pmbootstrap install --disk=/dev/sdX

Replace X with the letter your device was assigned.

Alternatively, write into the microSD card using the command above, then plug it in.

Progress

Will move to linux-grate soon.

Mainline status

The old kernel still exists for reference, but I will move to grate kernel where Clamor has already submitted the device tree. As for my tree, I would develop independently.

Kernel Boot Log

See ttyUSB0_d254a6c.log on GitHub.

Function Sheet

Function	Hardware	Status	Info
Boot	-	Y	linux-postmarketos-grate 7.0.1
Display	Sharp LQ079L1SX01/AUO ?	P	Sharp panel has been tested. No AUO device available.
Touchscreen	Atmel mXT1664T2-C2U/Synaptics 7040(?)	P	There are two kinds of touchscreen, which for my device is mXT1664T2-C2U. Atmel has been tested, no Synaptics device available.
Onscreen RGB LED	Texas Instruments(National Semiconductor) LP5521	Y	-
Backlight LED	Texas Instruments LP8556	Y	-
Charger IC	Texas Instruments BQ24192	P	The charger IC's driver assumes a pull-down CE pin, that's an upstream bug.
Battery Management	Texas Instruments BQ27520-G4	Y	-
Power Management & NTP etc. (palmas)	Texas Instruments TPS65913	Y	-
Wi-Fi, BT & FM	Cypress(Broadcom) CYW4354XKUBG	P	WiFi worked, Bluetooth broken.
GPU	NVIDIA GK20A	P	Known issues
Audio	NXP TFA9890 & Realtek RT5671	-	sound/nxp,tfa989x, Missing bindings for RT5671
Ambient Light	Renesas ISL29035	-	iio/light/isl29018
Magnetometer	AKM09911	-
Thermal Zone	Texas Instruments TMP451	Y	-
Haptics Driver	Texas Instruments DRV2604	Y	-
Gyro + Accelerometer	ST LSM6DB0TR	N	Upstream not supported yet.
Camera	Sony IMX179 & Omni OV5696	N