> > > One problem is that as things stand for some drivers read() is the only > > > supported interface so needs to be as efficient as possible. > > > > Do such drivers exist? > I'm going by memory from old stuff on the list here, so I may be > mistaken, but I thought that bttv was somewhat the exception in terms > of supporting mmap, or am I just thinking of DMA? Do the USB cams > support mmap? At least two usb drivers support mmap: ov511 and mod_quickcam. Didn't had any other usb hardware until now, so I'm not sure about others... Gerd -- Gerd Knorr <kraxel@xxxxxxxxxxx> -- SuSE Labs, Außenstelle Berlin
