* Tom Mises <tommises@xxxxxxxxx> [150701 11:24]: > On Mon, May 18, 2015 at 8:59 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > For the memcpy part with DMA this patch should help too: > > > > [PATCH] dmaengine: omap-dma: Add support for memcpy > > The patch should help, but not out of the box as far as I understand. > My understanding is that to take advantage of this, it would be > necessary to explicitly call the DMA API either by replacing memcpy() > in uvc_video_decode_data() or by modyfying the memcpy() > implementation. Is that correct? Yes you should be able to configure the DMA to do memory-to-memory copy where both source and destination address is looping over the desired buffer size. Ideally you would move the data from camera directly to the buffer without doing a memcpy inbetween. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
