By default I think the v4l driver has been built-in the Yocto linux kernel according the code(http://git.yoctoproject.org/cgit/cgit.cgi/meta-intel-contrib/commit/?h=e...) So if you're using the prebuilt yocto imgae, the v4l driver should be available? --- BTW, in case you need to build your own image by yourself, please see http://software.intel.com/en-us/forums/showthread.php?t=104267 for how to build a yocto image (that includes the yocto kernek/module). After you download the related poky source codes(http://nuedc.sjtu.edu.cn/pages/index_cn.html, poky-src-to-build-yocot-linux.rar/System building tool), you shouldn't need to downloaded any extra package besides the poky-src-to-build-yocot-linux.rar, if you follow the README.