Linux Support For HDMI CEC Still In Development
Written by Michael Larabel in Hardware on 8 October 2012 at 04:33 PM EDT. 3 Comments
A brief status report was shared concerning supporting the Consumer Electronics Control (CEC) feature of HDMI under Linux.

Back at the Linux Plumbers Conference in August, the Linux developers meeting in San Diego decided to create a CEC bus with CEC clients that is independent of the Video 4 Linux 2 and DRM APIs, so that both those sub-systems along with other "clients" could use this HDMI feature.

Consumer Electronics Control allows for controlling up to ten CEC-enabled devices connected via HDMI by using only one of the remote controls. CEC comes down to being a one-wire bi-directional serial bus built atop the AV.link protocol for remote control functionality.

HDMI CEC allows controls like controlling audio/video playback, system standby, one-touch recordings, timer programming, tuner control, system information, on-screen displays, routing control, and much more. Up to this point there hasn't been any unified support for HDMI CEC in the mainline Linux kernel.

The update on the Linux kernel CEC API support can be found here on the mailing list. Unfortunately the new CEC kernel bus isn't ready for Linux 3.7.
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Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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