drm/i915: correctly set IGD device's gtt size for KMS.

IGD device only has last 1 page used by GTT.  This should match the AGP gart
code.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 85549f615b1f23560f78831c550c3d1747a4358f..8ce57f9b11fa80de0db3f5d557d41fe3efd96ed7 100644 (file)
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -922,7 +922,7 @@ static int i915_probe_agp(struct drm_device *dev, unsigned long *aperture_size,
         * Some of the preallocated space is taken by the GTT
         * and popup.  GTT is 1K per MB of aperture size, and popup is 4K.
         */
-       if (IS_G4X(dev))
+       if (IS_G4X(dev) || IS_IGD(dev))
                overhead = 4096;
        else
                overhead = (*aperture_size / 1024) + 4096;