From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 10 Dec 2012 11:56:17 +0000 (+0200)
Subject: drm/i915: Open-code i915_gpu_idle() for handling seqno wrapping
X-Git-Tag: v3.9-rc1~83^2~40^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=107f27a5df8ad33a351d6e82fe95ff92b428f72e;p=pandora-kernel.git

drm/i915: Open-code i915_gpu_idle() for handling seqno wrapping

The complication is that during seqno wrapping we must be extremely
careful not to write to any ring as that will require a new seqno, and
so would recurse back into the seqno wrap handler. So we cannot call
i915_gpu_idle() as that does additional work beyond simply retiring the
current set of requests, and instead must do the minimal work ourselves
during seqno wrapping.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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