[Intel-gfx] [PATCH 1/2] drm/i915: Re-enable the command parser when using PPGTT

[bradley.d.volkin at intel.com]

From: Brad Volkin <bradley.d.volkin at intel.com>

In commit

commit 896ab1a5d54269b463a24194c2e4a369103b46d8
Author: Daniel Vetter <daniel.vetter at 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 at ffwll.ch>
Signed-off-by: Brad Volkin <bradley.d.volkin at intel.com>
---

At this point all platforms that use the command parser should have at
least aliasing PPGTT enabled I believe, so if you confirm then feel free
to delete the comment about VLV and make this check stricter - maybe
WARN_ON - when applying the patch.

 drivers/gpu/drm/i915/i915_cmd_parser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index c45856b..fb24dae 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -850,7 +850,7 @@ bool i915_needs_cmd_parser(struct intel_engine_cs *ring)
 	 * 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);
-- 
1.8.3.2