linux-drivers/
drivers/media/cec/usb/extron-da-hd-4k-plus

Extron DA HD 4K PLUS HDMI distribution amplifier CEC adapter

A USB-attached CEC (Consumer Electronics Control) interface built into Extron's DA HD 4K PLUS series of professional HDMI distribution amplifiers (part numbers 60-1607-01, 60-1608-01, 60-1609-01), which split a single 4K HDMI source out to 2, 4, or 6 displays in commercial AV installations. The driver lets Linux send and receive HDMI CEC remote-control and power messages through the amplifier.

keep conf=0.88 last_sold=2025 deploy=low replacement=none subsystem=media category=media-other
88%

recommendation

It should stay in the kernel because the hardware is still sold new by Extron in 2025, the driver itself only landed upstream in 2024 and was last touched in September 2025, and no other driver covers these 2/4/6-port HDMI distribution amplifiers. Deployment is niche (professional AV and integrator installations) but clearly active, with no removal or deprecation discussion on the mailing lists.

repository signals

6 files
2,663 source lines
9 commits, 5y
+2,697 / −18 lines added / removed, 5y
6 authors, 5y
monthly commits · 2021-04-21 → 2026-04-21 · 9 total · active in 8/61 months
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sources

  1. kernel.org

    Official kernel documentation has a dedicated section for the Extron DA HD 4K PLUS CEC adapter driver, covering supported 2/4/6-port models and firmware requirements.

  2. extron.com

    Vendor product page shows the DA HD 4K PLUS Series as a current product family rather than retired hardware, indicating new-sale availability in 2025.

  3. cateee.net

    LKDDb shows CONFIG_USB_EXTRON_DA_HD_4K_PLUS_CEC present in upstream kernels from 6.12 through 6.19 and 7.0-rc+HEAD.

codex reasoning notes (technical)

Local shell inspection (`rg`) shows this is a real serio-backed kernel driver (`module_serio_driver`) for Extron part numbers 60-1607-01/60-1608-01/60-1609-01, not helper-only code. `web.search_query` on lore.kernel.org for the driver/path found no obvious removal or deprecation thread; combined with the provided recent substantive touch date (2025-09-09) and the driver only landing in 2024, this looks actively maintained rather than obsolete. URLs were obtained via `web.search_query`: kernel.org CEC admin guide for supported hardware, Extron current product page for market status, and cateee LKDDb for upstream presence. Deployment is likely low-volume but ongoing in AV/integration installations, so there is no clear case for deprecation or removal, and there is no natural replacement driver covering the same hardware.