Worked on the torvalds/linux repository to enhance audio subsystem stability, focusing on resolving a hardware compatibility issue with the CS42L43 codec. Addressed a bug where headphone audio output was missing by correcting the mapping of LINEOUT jack types to the Headphone DAPM path and updating soc_jack_pins to include SND_JACK_LINEOUT. This kernel-level fix, implemented in C, improved plug-and-play behavior and reduced user reports of missing audio. Demonstrated expertise in audio driver development, embedded systems, and kernel development by delivering disciplined patches that restored reliable headphone detection and output, ultimately improving the user experience for affected hardware configurations.