From: Ben Widawsky <ben@bwidawsk.net>
Date: Mon, 30 Jun 2014 16:53:38 +0000 (-0700)
Subject: drm/i915/bdw: implement semaphore wait
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~125^2~49^2~59
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ee426ca135c91e071d23853e876b957526841c5;p=pandora-kernel.git

drm/i915/bdw: implement semaphore wait

Semaphore waits use a new instruction, MI_SEMAPHORE_WAIT. The seqno to
wait on is all well defined by the table in the previous patch. There is
nothing else different from previous GEN's semaphore synchronization
code.

v2: Update macros to not require the other ring's ring->id (Chris)

v3: Add missing VCS2 gen8_ring_wait init besides
    s/ring_buffer/engine_cs (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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