Liangxu Linux

Apr 9, 2024 · Fundamentals

How Linux Detects Headphone Plug/Unplug Events via the ASoC Jack Driver

This article explains the Linux kernel's built‑in headphone jack detection mechanism, detailing the asoc_simple_init_jack function, device‑tree GPIO lookup, jack registration, event reporting flow, and highlights platform‑specific alternatives for Rockchip and MediaTek hardware.