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drm/i915: Allow full PPGTT with param override

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When PPGTT was disabled by default, the patch also prevented the user
from overriding this behavior via module parameter. Being able to test
this on arbitrary kernels is extremely beneficial to track down the
remaining bugs. The patch that prevented this was:

commit 93a25a9e2d
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Mar 6 09:40:43 2014 +0100

    drm/i915: Disable full ppgtt by default

By default PPGTT is set to -1. 0 means off, 1 means aliasing only, 2
means full, all other values are reserved.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2014-03-24 18:06:00 -07:00 committed by Daniel Vetter
parent 0260c42003
commit 8d214b7d9c
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -50,7 +50,7 @@ bool intel_enable_ppgtt(struct drm_device *dev, bool full)
/* Full ppgtt disabled by default for now due to issues. */
if (full)
return false; /* HAS_PPGTT(dev) */
return HAS_PPGTT(dev) && (i915.enable_ppgtt == 2);
else
return HAS_ALIASING_PPGTT(dev);
}