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Date: Wed, 06 Jul 2011 17:47:27 +0200
From: Marek Szyprowski <m.szyprowski@samsung.com>
Subject: RE: [PATCH 6/8] drivers: add Contiguous Memory Allocator
In-reply-to: <20110706153704.GF8286@n2100.arm.linux.org.uk>
To: "'Russell King - ARM Linux'" <linux@arm.linux.org.uk>
Cc: "'Arnd Bergmann'" <arnd@arndb.de>, linux-kernel@vger.kernel.org,
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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
-- 
Marek Szyprowski
Samsung Poland R&D Center