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MediaTek Helio G99 (MT6789/MT8781)

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MediaTek Helio G99
Helio G99
Helio G99
Manufacturer MediaTek
Name Helio G99
Architecture aarch64
CPU 2x ARM Cortex-A76 (2.2 GHz)
6x ARM Cortex-A55 (2.0 GHz)
GPU ARM Mali-G57 MC2
Year 2022
Process 6nm
Mainline partial
Generic device port MediaTek G99 (MT6789/MT8781) (generic-mediatek-g99)
Components
CPU
SMP (bring up secondary CPU cores), CPU frequency scaling, CPUidle
Partial
UART
Works
Storage
eMMC, SD cards, UFS, ...
Works
USB
Works
Display
Partial
GPU
Works
Pinctrl
Works
I²C
Works
SPI
Serial Peripheral Interface
Works
Audio
Broken
Video
Hardware-accelerated video de/encoding
Broken
Thermal
Works
WiFi
Broken
Bluetooth
Broken
Modem
Calls, SMS, Internet
Broken
GPS
Broken
Camera
Broken
Suspend
Broken

The MediaTek Helio G99 is a mid-range SoC for tablets and gaming smartphones released in 2022. Two variants exist, MT6789 and MT8781, which are very similar and can use the same dts.[1]

Devices

Helio G99 (MT6789)

Device Codename Category Booting
LincPlus T4 lincplus-t4 No
MediaTek G99 (MT6789/MT8781) generic-mediatek-g99 testing Yes
Motorola Moto G72 motorola-vicky testing Yes
Teclast T50 Max teclast-t50max No
Teclast T65 Max teclast-t65max No
Tecno Pova 6 tecno-li7
Unihertz Jelly Star unihertz-jelly-star No
Volla Phone X23 volla-vidofnir No
Xiaomi POCO M6 Pro 4G / Redmi Note 13 Pro 4G / Redmi Note 14S xiaomi-emerald Yes
Xiaomi Redmi Note 14 xiaomi-tanzanite Yes

Helio G99 (MT8781)

Device Codename Category Booting
Lenovo Tab Plus lenovo-tb351fu No
Xiaomi Redmi Pad xiaomi-yunluo No
Zinwa Q25 zinwa-q25 testing Yes

Helio G100

No results

Helio G200

No results

Mainline Status:

Mainline fork

A close-to-mainline fork is developed for this SoC here: *link*

SMP

Only 6 cores are working for now.

USB

Works at both device/host modes. But dual-role mode is broken.

Display

GPU works. Only simple-framebuffer for now.

References