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[0557/1094] drm/i915: Allow full PPGTT with param override

Message ID 1413889294-31328-558-git-send-email-dheerajx.s.jamwal@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dheeraj Jamwal Oct. 21, 2014, 10:52 a.m. UTC 
From: Ben Widawsky <benjamin.widawsky@linux.intel.com>

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 93a25a9e2d67765c3092bfaac9b855d95e39df97
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>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit 0f9dc59db6abc475dc23afc077fabbc606b8830f)

Signed-off-by: Dheeraj Jamwal <dheerajx.s.jamwal@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index ab5e93c..62a5c36 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -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);
 }