From: Ben Widawsky <benjamin.widawsky@intel.com>
Date: Tue, 29 Apr 2014 21:52:29 +0000 (-0700)
Subject: drm/i915: Virtualize the ringbuffer signal func
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~44^2~56^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=78325f2d270897c9ee0887125b7abb963eb8efea;p=pandora-kernel.git

drm/i915: Virtualize the ringbuffer signal func

This abstraction again is in preparation for gen8. Gen8 will bring new
semantics for doing this operation.

While here, make the writes of MI_NOOPs explicit for non-existent rings.
This should have been implicit before.

NOTE: This is going to be removed in a few patches.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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