On Mon, 15 Nov 2010, Jun Nie wrote: > 2010/11/8 Jun Nie <niej0001@xxxxxxxxx>: > > 2010/11/2 Guennadi Liakhovetski <g.liakhovetski@xxxxxx>: > >> Hi Jun > >> > >> On Fri, 29 Oct 2010, Jun Nie wrote: > >> > >>> Hi Guennadi, > >>> I find that your idea of "provide a generic framebuffer driver > >>> that could sit on top of a v4l output driver", which may be a good > >>> solution of our LCD controller driver, or maybe much more other SOC > >>> LCD drivers. V4L2 interface support many features than framebuffer for > >>> video playback usage, such as buffer queue/dequeue, quality control, > >>> etc. However, framebuffer is common for UI display. Implement two > >>> drivers for one controller is a challenge for current architecture. > >>> I am interested in your idea. Could you elaborate it? Or do you > >>> think multifunction driver is the right solution for this the > >>> scenario? > >> > >> Right, we have discussed this idea at the V4L2/MC mini-summit earlier this > >> year, there the outcome was, that the idea is not bad, but it is easy > >> enough to create such framebuffer additions on top of specific v4l2 output > >> drivers anyway, so, noone was interested enough to start designing and > >> implementing such a generic wrapper driver. However, I've heard, that this > >> topic has also been scheduled for discussion at another v4l / kernel > >> meeting (plumbers?), so, someone might be looking into implementing > >> this... If you yourself would like to do that - feel free to propose a > >> design on both mailing lists (fbdev added to cc), then we can discuss it, > >> and you can implement it;) > >> > >> Thanks > >> Guennadi > >> --- > >> Guennadi Liakhovetski, Ph.D. > >> Freelance Open-Source Software Developer > >> http://www.open-technology.de/ > >> > > > > Good to know others are also interested in it. I surely can contribute > > to it. But my concern is how to support Xwindow. Android and Ubuntu > > should both run on our platform. Queue/deque should work well for > > Android UI. I still can not figure out how to support Xwindow, for it > > does not interact with driver after it get the mmaped buffer. > > > > Jun > > > > Guennadi, > > Any idea on supporting this feature with V4L2 based FB? I can not > figure out any method and will adopt framebuffer for UI and V4L2 for > video layer for the schedule pressure. Hi Jun Sorry, not sure I understand you right here. You are saying, that atm you don't have the time to work on a generic solution and are going for a specific one, right? Yes, that's what everybody is currently doing. And you're asking whether I am working or am going to work on such a generic solution? No, sorry, I don't think I'll have time for it either in the near future. Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- 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
