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drm/i915/vlv: disable PPGTT on early revs v3

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Early revs didn't have PPGTT support, so disable there.

v2: add debug msg when disabling on early stepping
v3: enable on other B3 packages as well (untested) (Ville)

References: https://bugs.freedesktop.org/show_bug.cgi?id=79669
References: https://bugs.freedesktop.org/show_bug.cgi?id=79670
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2014-06-13 09:28:33 -07:00 committed by Daniel Vetter
parent d593d992a9
commit 62942ed727
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -63,6 +63,12 @@ static int sanitize_enable_ppgtt(struct drm_device *dev, int enable_ppgtt)
}
#endif
/* Early VLV doesn't have this */
if (IS_VALLEYVIEW(dev) && dev->pdev->revision < 0xb) {
DRM_DEBUG_DRIVER("disabling PPGTT on pre-B3 step VLV\n");
return 0;
}
return HAS_ALIASING_PPGTT(dev) ? 1 : 0;
}