From: Ben Widawsky <benjamin.widawsky@intel.com>
Date: Mon, 30 Jun 2014 16:53:36 +0000 (-0700)
Subject: drm/i915: gen specific ring init
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~125^2~49^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=707d9cf9935cfba2d62dd80dc01dc5dc4530d4ca;p=pandora-kernel.git

drm/i915: gen specific ring init

Gen8 has already had some differentiation with how it handles rings.
Semaphores bring yet more differences, and now is as good a time as any
to do the split.

Also, since gen8 doesn't actually use semaphores up until this point,
put the proper "NULL" values in for the mbox info.

v2: v1 had a stale commit message

v3: Move everything in the is_semaphore_enabled() check

v4: VCS2 rebase
Remove double assignment of signal in render ring (Ville)

v5: Adding missed VCS2 signal init on gen8+ (Rodrigo)

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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