linux-kernel - Re: [PATCH 0/9] TI DMM-TILER driver

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Date:	Thu, 16 Dec 2010 13:02:08 -0600
From:	David Sin <davidsin@...com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org, Greg KH <greg@...ah.com>,
	Russell King <rmk@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org
Subject: Re: [PATCH 0/9] TI DMM-TILER driver

On Thu, Dec 16, 2010 at 06:43:48PM +0100, Arnd Bergmann wrote:
> As far as I can tell, both DMM and GEM at a high level manage objects
> in video memory. The IOMMU that you have on the Omap hardware seems
> to resemble the GART that sits between PC-style video cards and main
> memory.
> 
> I don't know any details, but google quickly finds
> http://lwn.net/Articles/283798/ with a description of the
> initial GEM design. My main thought when looking over the
> DMM code was that this should not be tied too closely to a
> specific hardware, and GEM seems to be an existing abstraction
> that may fit what you need.
> 
> 	Arnd
Thanks for the pointer, Arnd.  I also found a nice readme file in 
the gpu/drm directory, which points to a wiki and source code.  
I'll read into this and get back to you.

BR,
-- 
David Sin
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