2012/9/6 Hans Verkuil <hverkuil@xxxxxxxxx>: > On Thu 6 September 2012 12:29:17 Jun Nie wrote: >> 2012/9/6 Hans Verkuil <hverkuil@xxxxxxxxx>: >> > On Thu September 6 2012 06:09:44 Jun Nie wrote: >> >> 2012/9/5 Hans Verkuil <hverkuil@xxxxxxxxx>: >> >> > 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, >> >> > >> >> > Hans >> >> >> >> Thanks 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. > >> I mean all the feature that can involved in handhold remote control, >> one touch play, standby, on screen display, etc, such as >> play/pause/poweroff. I want to mention all non CDC features that can >> be implemented in user space. They are hard to be covered by any >> sub-system and user space library is more proper. Just like your >> metaphor, kitchen sink for CEC. I like your words. > > Yes, that will all be userspace. > > My plan is to have the CEC adapter driver handle the core CEC protocol, > allow other drivers to intercept messages that are relevant for them and > send messages themselves, and anything that remains will be available to > userspace for which a new library will be created. > > Now, don't ask me about any of the details, since I don't have them yet :-) > My plan is to start working on this next week or the week after. > > Are you willing to test early versions of this work? Can you test HDMI 1.4a > features as well? Testing this might well be one of the harder things to do. > I am willing to test or contribute to the library. But my hardware does not include HEAC. So my test scope limites to the features that can be implemented in user space. > Regards, > > Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
