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 -- 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
