Hello, On Tuesday, March 01, 2011 11:26 AM Edward Hervey wrote: > On Mon, 2011-02-28 at 09:50 +0100, Marek Szyprowski wrote: > > Hello, > [...] > > > > I'm not sure that highmem is the right solution. First, this will force > > systems with rather small amount of memory (like 256M) to use highmem just > > to support DMA allocable memory. It also doesn't solve the issue with > > specific memory requirement for our DMA hardware (multimedia codec needs > > video memory buffers from 2 physical banks). > > Could you explain why a codec would require memory buffers from 2 > physical banks ? > Well, this is rather a question to hardware engineer who designed it. I suspect that the buffers has been split into 2 regions and placed in 2 different memory banks to achieve the performance required to decode/encode full hd h264 movie. Video codec has 2 AXI master interfaces and I expect it is able to perform 2 transaction to the memory at once. Best regards -- Marek Szyprowski Samsung Poland R&D Center -- 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
