
Developed a deterministic USB Device Controller selection feature for the qualcomm-linux/meta-qcom repository, targeting improved ADB enumeration on platforms with multiple UDCs. The solution used Shell scripting and embedded Linux development skills to implement speed-based binding, ensuring the gadget consistently attaches to the controller with the highest maximum speed. This approach replaced the previous non-deterministic method, which selected UDCs based on directory order, thereby enhancing reliability and reducing startup time for ADB. The work was validated on Qualcomm SoCs with dual UDCs and aligned with established USB gadget framework practices, contributing to more predictable device enumeration in embedded systems.
February 2026: Delivered a deterministic UDC selection feature in qualcomm-linux/meta-qcom to improve ADB enumeration on multi-UDC platforms. Implemented speed-based binding that prioritizes the UDC with the highest maximum_speed (super-speed-plus > super-speed > high-speed > full-speed > low-speed), ensuring the gadget binds to the most capable controller. This addresses non-deterministic binding that previously selected the first UDC in directory order, improving reliability and startup time for ADB.
February 2026: Delivered a deterministic UDC selection feature in qualcomm-linux/meta-qcom to improve ADB enumeration on multi-UDC platforms. Implemented speed-based binding that prioritizes the UDC with the highest maximum_speed (super-speed-plus > super-speed > high-speed > full-speed > low-speed), ensuring the gadget binds to the most capable controller. This addresses non-deterministic binding that previously selected the first UDC in directory order, improving reliability and startup time for ADB.

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