linux-kernel - Re: [PATCH] ARM: omapfb: Add early framebuffer memory allocator

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Date:	Fri, 27 Dec 2013 10:48:01 +0100
From:	Pavel Machek <pavel@....cz>
To:	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
Cc:	tomi.valkeinen@...com, tony@...mide.com, linux@....linux.org.uk,
	pali.rohar@...il.com, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ivaylo Dimitrov <freemangordon@....bg>
Subject: Re: [PATCH] ARM: omapfb: Add early framebuffer memory allocator

On Thu 2013-12-26 01:12:39, Ivaylo Dimitrov wrote:
> From: Ivaylo Dimitrov <freemangordon@....bg>
> 
> On memory limited devices, CMA fails easily when asked to allocate big
> chunks of memory like framebuffer memory needed for video playback.
> 
> Add boot parameter "omapfb_memsize" which allocates memory to be used
> as dma coherent memory, so dma_alloc_attrs won't hit CMA allocator when
> trying to allocate memory for the framebuffers
> 
> Signed-off-by: Ivaylo Dimitrov <freemangordon@....bg>

Hmm, would it make sense to add a parameter to reserve certain ammount
of memory for CMA? omapfb is probably not the only user hitting
this...?
									Pavel
-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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