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. Jun -- 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
