Re: [Linaro-mm-sig] [PATCH 6/8] drivers: add Contiguous Memory Allocator

Hello,

On Wednesday, July 06, 2011 5:37 PM Russell King - ARM Linux wrote:

On Wed, Jul 06, 2011 at 04:56:23PM +0200, Marek Szyprowski wrote:

...

This will not solve our problems. We need CMA also to create at least one device private area that for sure will be in low memory (video codec).

You make these statements but you don't say why. Can you please explain why the video codec needs low memory - does it have a restricted number of memory address bits which it can manipulate?

Nope, it only needs to put some type of memory buffers in first bank (effectively in 30000000-34ffffff area) and the others in the second bank (40000000-57ffffff area). The values are given for Samsung GONI board.

Best regards