Introduction to DAPM - Linux Power Management for Embedded Audio Devices

Explore DAPM (Digital Audio Power Management) in this 35-minute conference talk by Luca Ceresoli from Bootlin. Discover how DAPM, a component of ASoC (ALSA for System-on-Chips), dynamically manages power consumption in audio hardware for embedded Linux systems. Learn about the motivations behind DAPM, its hardware modeling approach, and its operational mechanisms. Gain insights into implementing DAPM in drivers and utilizing user space tools for runtime analysis. The talk also covers potential improvements to DAPM tooling and documentation, providing a comprehensive overview of this lesser-known but crucial aspect of embedded audio power management.