linux-sky1

Linux kernel patches and configuration for CIX Sky1 SoC (Radxa Orion O6 and compatible boards).

Overview

This repository contains the Sky1 kernel patch set:

• 68 patches on top of Linux 6.18.x for CIX Sky1 SoC support
• Kernel configuration for arm64

Repository Structure

linux-sky1/
├── patches/           # Git-formatted kernel patches
│   ├── 0001-*.patch
│   └── ...
├── config/
│   ├── config.sky1    # Production kernel config
│   └── README.md      # Config documentation
└── CHANGELOG.md       # Patch set version history

Supported Hardware

• SoC: CIX CD8180 (Sky1)
• Board: Radxa Orion O6
• GPU: Mali-G720-Immortalis (via Panthor driver)
• Display: DisplayPort via linlon-dp/trilin-dpsub

Using These Patches

Apply to Kernel Source

# Download kernel
wget https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.18.2.tar.xz
tar xf linux-6.18.2.tar.xz
cd linux-6.18.2

# Apply patches
for p in /path/to/linux-sky1/patches/*.patch; do
    patch -p1 < "$p"
done

# Use config
cp /path/to/linux-sky1/config/config.sky1 .config
make ARCH=arm64 olddefconfig

Build Kernel

make ARCH=arm64 -j$(nproc) Image modules dtbs

Patch Categories

Category	Patches	Description
Platform	0001-0002	DTS, SCMI, mailbox
PCIe	0003-0011, 0054, 0061	Cadence controller, ATU, MSI quirks, hotplug, I/O windows
Display	0012-0013	linlon-dp, trilin-dpsub, USBDP PHYs
USB	0014-0017	CDNSP, RTS5453 Type-C PD
GPU	0018-0021, 0043, 0051-0053	Panthor Sky1 support
Audio	0022-0040	HDA, DMA-350, DSP
Power	0062-0064, 0066, 0068	DDR LP, bus DVFS, CPU IPA
Misc	0041-0042, 0044-0050, 0055-0061, 0065, 0067	PDC, hwspinlock, eFuse, SoC info, cpufreq, SMMU, SPE, DTS, PCIe I/O, dptx fix, rtw89 fix

Installing Pre-built Packages

Pre-built kernel packages are available from the Sky1 Linux apt repository:

# Add repository key
wget -qO- https://sky1-linux.github.io/apt/key.gpg | sudo tee /usr/share/keyrings/sky1-linux.asc > /dev/null

# Add repository
echo "deb [signed-by=/usr/share/keyrings/sky1-linux.asc] https://sky1-linux.github.io/apt sid main" | \
    sudo tee /etc/apt/sources.list.d/sky1-linux.list

# Install kernel
sudo apt update
sudo apt install linux-image-6.18.2-sky1 linux-headers-6.18.2-sky1 sky1-firmware

Documentation

• Kernel Configuration Guide - Essential vs optional configs for Sky1

Related Repositories

• sky1-linux-build - Build tooling for kernel packages
• apt - APT repository
• sky1-firmware - Firmware packages
• sky1-drivers-dkms - DKMS drivers (VPU, NPU, 5GbE)

License

• Kernel patches: GPL-2.0 (same as Linux kernel)