drm/i915: Re-enable the command parser when using PPGTT

In commit

commit 896ab1a5d54269b463a24194c2e4a369103b46d8
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Aug 6 15:04:51 2014 +0200

    drm/i915: Fix up checks for aliasing ppgtt

it looks like we accidentally inverted the check that the command
parser should only run when the driver enables some form of PPGTT.

Testcase: igt/gem_exec_parse
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com>
[danvet: Also drop the comment right above, all production vlv now
have hw ppgtt enabled.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index c45856b..d40f264 100644 (file)
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -845,12 +845,7 @@ bool i915_needs_cmd_parser(struct intel_engine_cs *ring)
        if (!ring->needs_cmd_parser)
                return false;
 
-       /*
-        * XXX: VLV is Gen7 and therefore has cmd_tables, but has PPGTT
-        * disabled. That will cause all of the parser's PPGTT checks to
-        * fail. For now, disable parsing when PPGTT is off.
-        */
-       if (USES_PPGTT(ring->dev))
+       if (!USES_PPGTT(ring->dev))
                return false;
 
        return (i915.enable_cmd_parser == 1);