On Fri, Sep 16, 2011 at 1:14 AM, Sakari Ailus <sakari.ailus@xxxxxx> wrote: > Cliff Cai wrote: >> Dear guys, > > Hi Cliff, > >> I'm currently working on a camera/ISP Linux driver project.Of course,I >> want it to be a V4L2 driver,but I got a problem about how to design >> the driver framework. >> let me introduce the background of this ISP(Image signal processor) a >> little bit. >> 1.The ISP has two output paths,first one called main path which is >> used to transfer image data for taking picture and recording,the other >> one called preview path which is used to transfer image data for >> previewing. >> 2.the two paths have the same image data input from sensor,but their >> outputs are different,the output of main path is high quality and >> larger image,while the output of preview path is smaller image. > > Is the ISP able to process images which already are in memory, or is > this only from the sensor? yes,it has another DMA to achieve this. Cliff >> 3.the two output paths have independent DMA engines used to move image >> data to system memory. >> >> The problem is currently, the V4L2 framework seems only support one >> buffer queue,and in my case,obviously,two buffer queues are required. >> Any idea/advice for implementing such kind of V4L2 driver? or any >> other better solutions? > > Regards, > > -- > Sakari Ailus > sakari.ailus@xxxxxx > -- 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
