On Thu September 6 2012 06:09:44 Jun Nie wrote:
2012/9/5 Hans Verkuil hverkuil@xs4all.nl:
On Wed 5 September 2012 10:04:41 Jun Nie wrote:
Is there any summary for this summit or presentation material? I am looking forward for some idea on CEC. It is really complex in functionality. Maybe other guys is expecting simiar fruite from summit too.
Yes, there will be a summit report. It's not quite finished yet, I think.
With respect to CEC we had some useful discussions. It will have to be a new class of device (/dev/cecX), so the userspace API will be separate from drm or v4l.
And the kernel will have to take care of the core CEC protocol w.r.t. control and discovery due to the HDMI 1.4a requirements.
I plan on starting work on this within 1-2 weeks.
My CEC presentation can be found here:
http://hverkuil.home.xs4all.nl/presentations/v4l2-workshop-cec.odp
Regards,
HansThanks for quick response! It's good to know that CEC is independent with DRM/V4L for my HDMI implementation is FB/lcd-device based. CEC is also deserved to have independent management in both hardware signal and functionality. Someone also expressed similar thoughts before. Will remote control protocal parsing are done in userspace reference library? Or not decided yet?
Are you referring to the remote control pass-through functionality? I don't know yet whether that will go through a userspace library or through the RC kernel subsystem, or possibly both.
Most of the other non-system messages will go to a userspace library.
But I haven't started coding yet, so it is very early days :-)
The main thing is that at least I now have a high-level design that I can start to work with.
Regards,
Hans