I have sent an invitation for 3pm UTC Monday 7th March to have a discussion on things that can be explored/worked upon in Linaro related to v4l2 support.The idea is to come out with concrete activities that can be targeted in Linaro MM WG to address this topic.
If any body is unhappy with time please let me know.I tried to take care of US,Europe and India time zones. Also please forward the invitation to anybody I have missed out on
On Tue, Mar 1, 2011 at 4:21 PM, Marek Szyprowski email@example.com:
On Tuesday, March 01, 2011 11:26 AM Edward Hervey wrote:
On Mon, 2011-02-28 at 09:50 +0100, Marek Szyprowski wrote:
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
to support DMA allocable memory. It also doesn't solve the issue with specific memory requirement for our DMA hardware (multimedia codec
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.
Marek Szyprowski Samsung Poland R&D Center
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