From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 5 Jul 2012 10:17:30 +0000 (+0200)
Subject: drm/i915: adjust framebuffer base address on gen4+
X-Git-Tag: v3.6-rc1~83^2~39^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2c75131244507c93f812862fdbd4f3a37139401;p=pandora-kernel.git

drm/i915: adjust framebuffer base address on gen4+

The tileoffset register only supports a limited offset in x/y of 4096,
so for giant screen configuration with a shared fb we wrap around.

Fix this by computing a linear offset in tiles (pages) and only use
the tileoffset register to offset within the tile.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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