From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Fri, 21 Nov 2014 19:54:25 +0000 (+0200)
Subject: drm/i915: Fix gen4 GPU reset
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~77^2~9^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=73bbf6bd907906dcbdc78f3af38a722c0fe498d8;p=pandora-kernel.git

drm/i915: Fix gen4 GPU reset

On pre-ctg the reset bit directly controls the reset signal. We must
assert it for >=20usec and then deassert it. Bit 1 is a RO status bit
which should also go down when the reset is no longer asserted.

Tested-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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