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HDMI-TX hardware is output-only but the driver incorrectly advertises capture capability. This causes PulseAudio to attempt opening capture streams, which triggers busy flag conflicts with playback streams, resulting in mono audio output. Solution: Disable capture support by setting channels_min/max to 0 for both I2S and SPDIF DAIs when used with HDMI-TX. Note: Mainline kernel has the same issue. An official fix is planned with the new HDMI Codec Framework being developed by Linaro (2025). Fixes mono audio on: RK3576 NanoPi R76S, NanoPi M5 Tested-on: NanoPi R76S
Purpose of This Repository
This repository contains a customized version of the Linux kernel, maintained by the Armbian team, with specific adaptations for Rockchip SoCs (System-on-Chips) used in a wide range of ARM-based single board computers.
It serves as the base for:
- Kernel development and maintenance for Armbian-supported devices.
- Hardware enablement, performance tuning, and stability patches specific to Rockchip-based platforms.
- Integration with the Armbian build framework to produce ready-to-use OS images.
This repository is intended for developers, testers, and contributors working with the Armbian project and the broader Rockchip ARM ecosystem.