drm/i915: Tidy Ironlake watermark computation
authorChris Wilson <chris@chris-wilson.co.uk>
Sat, 11 Sep 2010 09:46:47 +0000 (10:46 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Sat, 11 Sep 2010 09:59:57 +0000 (10:59 +0100)
Refactor the common code into seperate functions and use the MIN(large,
small) buffer calculation for self-refresh watermarks.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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