Xiaomi Mi TV Stick (xiaomi-aquaman)

Xiaomi Mi TV Stick
	File:Xiaomi-aquaman.jpg
Manufacturer	Xiaomi
Name	Mi TV Stick
Codename	xiaomi-aquaman
Released	2020
Type	set-top box
Hardware
Chipset	Amlogic S805Y
CPU	Quad-core 1.2 GHz Cortex-A53
GPU	ARM Mali-450
Display	Up to 1080p over HDMI
Storage	8GB
Memory	1GB
Architecture	aarch64
Software
Original software	Android (TV)
Original version	9
postmarketOS
Category	testing
Pre-built images	no
Generic port	Amlogic Generic TV Box (amlogic-tvbox)

This device is supported as part of a generic port. Refer to Amlogic Generic TV Box (amlogic-tvbox) for installation instructions and more information.

Contributors

exkc (some initial research)
knuxify

Users owning this device

19atlas (Notes: 1080p version, heats up easily)
Exkc
Knuxify (Notes: 2x; one works, one has random shutdowns which seem to be caused by it overheating, since it works fine with the top of the casing taken off. Both running Android 9)
Mertoalex (Notes: family uses it, I debloated it with UAD-ng.)

How to enter recovery mode

On older firmware versions, you can get a shell in recovery via UART, however it is heavily restricted due to SELinux. Newer firmware versions do not expose a shell via UART.

Hold down the OK+Back keys on the remote while booting to boot into recovery.

Alternatively,

Plug in to PC
Enable devloader mode in settings
Run adb reboot recovery

Note that OTG does not work in the recovery, unlike on the Mi Box 3.

How to enter fastboot

There is currently no known way to unlock the bootloader.

Plug in to PC
Enable devloader mode in settings
Run adb reboot fastboot

WiFi

There are many variants with many different WiFi chips, including ones from Amlogic (not supported in mainline) or Realtek (some are supported, others aren't).

PCB variants

There are two variants of the PCB:

Old variant
New variant

How to downgrade to older version of Android 9

TODO. The downgrade method used for the Xiaomi Mi Box 3 (xiaomi-once) will not work, as OTG does not work in the recovery.

"Multiboot" mode

Implementing "Multiboot" mode (see Amlogic#Boot process) in the U-Boot environment via the U-Boot shell is needed to boot pm os but in newer revision of android 9 the uboot shell is being disabled so there are no way to implement this in newer revision.Sadly, there are no way to downgrade.

The guides in Xiaomi Mi Box 3 (xiaomi-once) might work for this device.However it is untested due to the issue above.