MT6768 downstream kernel blobs

Open-source kernels:

4.14

Not recommended due to poor code quality.

• Xiaomi Redmi 9 (lancelot) / Helio G80
• Xiaomi Redmi Note 9 (merlin) / Helio G85

...and other 4.14 kernels

Sample DTS

4.19

This is a good reference for devices that don't have newer, publicly available kernels.

A few Mediatek drivers (e.g., MMC) have switched to a mainline-like driver.

• Xiaomi Redmi 12 (fire) / Helio G88
• Xiaomi Redmi 13C (gale) / Helio G85

Sample DTS

5.10

The code quality has improved overall, though only for a few drivers.

• Generic kernel

Sample DTS

6.6

Recommended, (minor?) improvements over 5.10. Run cd kernel/kernel_device_modules-6.6 to get a linux-like directory structure

• Generic kernel
• Samsung A05s / Helio G85

Sample DTS

Closed-source kernels:

5.10.209

HyperOS 1 is known to use it with the Redmi 14C. Perhaps this is true for the whole MT6768 family.

6.6.30

HyperOS 2 uses it.

• Xiaomi Redmi 12 (fire) / Helio G88
• Xiaomi Redmi 14C (lake) / Helio G81-Ultra (rebranded G85?)

Refer to DTS file names for HyperOS version

Extracting DTB

1. Download fastboot HyperOS
2. Go to images directory
3. Get kernel version:
   • Run binwalk -Me boot.img
   • Run strings extractions/boot.img.extracted/*/decompressed.bin | grep 'Linux version'
4. binwalk -M vendor_boot.img
5. Find entry with Device tree blob entry and copy first value
6. Run dd if=vendor_boot.img of=dtb bs=1 skip=*paste value here*
7. Run dtc -I dtb -O dts -o *put os version and codename here*.dts dtb

Extracting DTBO

1. Clone extraction tool, otherwise run extract-dtb dtbo.img, switch to directory with dtb and go to step 7 of Extracting DTB
2. Copy dtbo.img to cloned directory
3. Run ./gradlew unpack
4. Copy build/unzip_boot/dt/dt.0.dts somewhere and rename it to *codename*-*version*-dtbo.dts

Any DTS/DTBO PRs appreciated.