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DAPM (Digital Audio Power Management) is the part of ASoC (Alsa for System-on-Chips) that dynamically turns on and off power to various parts of the audio hardware in embedded Linux systems. DAPM is very useful, but not very well known. After introducing the motivations for DAPM and how it models the hardware, Luca will describe how DAPM works, how to use DAPM in a driver and present some user space tools to understand how DAPM works at runtime. He will also mention some improvements to the DAPM tooling and documentation.
Luca is an embedded Linux and kernel engineer at Bootlin, primarily working on device drivers and recently active mostly on DRM bridges to support hotplugging of non-discoverable devices. He contributed several improvements the Linux kernel and other open source projects. Luca also... Read More →
