Name: Hotplug of Non-discoverable Hardware: Status and Future Directions - Luca Ceresoli, Bootlin
Start: 2025-08-26T14:10:00+0200
End: 2025-08-26T14:50:00+0200

25-27, August 2025
Amsterdam, Netherlands
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Tuesday August 26, 2025 14:10 - 14:50 CEST

Elicium 1

More and more industrial products are being designed with add-on components that can be hotplugged at runtime and connected with non-discoverable busses: I²C, MIPI CSI-2, LVDS, and seemingly simpler ones such as interrupts and GPIO lines.

Work is in progress for the kernel to support such hardware using device tree overlays. This talk describes the goals, work done and in progress and future directions. Special attention will be given to the DRM subsystem which is by far the most challenging one.

Topics covered are:

* Problem statement and overview of the goals

* Non-discoverable hotplug in general: device tree overlays and how to properly describe connectors and

add-ons (nexus nodes, export-symbols), instantiating devices, I²C bus issues

* DRM specific: hotplugging in the DRM subsystems, challenges in making DRM bridges removable, current work and next steps

Discussion about future directions will be very welcome.

Speakers

Luca Ceresoli

Embedded Linux and kernel engineer, Bootlin

Luca is an embedded Linux and kernel engineer at Bootlin, primarily working on device drivers and recently active mostly on DRM bridges, device tree overlays and various subsystem involved in hotplugging of non-discoverable devices.

Tuesday August 26, 2025 14:10 - 14:50 CEST
Elicium 1

Embedded Linux Conference

Audience Experience Level Any

Open Source Summit Europe 2025

Luca Ceresoli

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