From: Ben Widawsky <ben@bwidawsk.net>
Date: Thu, 9 Feb 2012 09:15:18 +0000 (+0100)
Subject: drm/i915: use gtfifodbg
X-Git-Tag: v3.4-rc1~143^2~85^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd202c6dd612beecf87b8b85c2f09b23f77364a2;p=pandora-kernel.git

drm/i915: use gtfifodbg

Add register definitions for GTFIFODBG, and clear it during init time to
make sure state is correct.

This register tells us if either a read, or a write occurred while the
fifo was full. It seems like bit 2 is an OR of bit 0 and bit 1, so we
check that as well, but the documents are not quite clear.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by (v1): Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

Reading git-diff-tree failed