[RFC PATCH] KMS support for i.MX51/53

Sascha Hauer s.hauer at pengutronix.de
Wed Jun 8 04:54:00 EDT 2011

On Tue, Jun 07, 2011 at 08:59:28PM +0100, Alan Cox wrote:
> > I'm not sure I understand you correctly. I have no address space on the
> > card side since my 'card' just uses main memory. The memory I need must
> > be a physically contiguous portion of sdram. I'm afraid shmem backing
> > memory is not of much use for me.
> I hadn't realised you had that underlying limit. If you are limited to a
> specific chunk of SDRAM and it must be physically linear rather than any
> of memory then indeed it's not.
> I'd been tweaking GEM so you can borrow the abstraction and handles but
> back them with your own allocator but in my case it makes sense because I
> can use either main memory or a chunk of linear preallocated memory
> reserved by the firmware so I wanted the commonality and single set of
> handles for GEM, IOCTL_MODE_CREATE_DUMB etc.

Your patch looks like it would do the trick. I'll see what I can do.


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