[PATCH 8/9] drm/i915/ehl: ehl has only 36bit extended ppgtt support

[Rodrigo Vivi <rodrigo.vivi@intel.com>]

From: Bob Paauwe <bob.j.paauwe@intel.com>

While EHL does support 4 level extended ppgtt, it only makes use
of 36 bits instead of the 48 like the other platforms that have
4 level extended ppgtt.

Signed-off-by: Bob Paauwe <bob.j.paauwe@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index dac08d9c3fab..584bb9898fed 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1539,9 +1539,12 @@ static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
 	ppgtt->vm.i915 = i915;
 	ppgtt->vm.dma = &i915->drm.pdev->dev;
 
-	ppgtt->vm.total = HAS_FULL_48BIT_PPGTT(i915) ?
-		1ULL << 48 :
-		1ULL << 32;
+	if (HAS_FULL_48BIT_PPGTT(i915))
+		ppgtt->vm.total = IS_ELKHARTLAKE(i915) ?
+			1ULL << 36 :
+			1ULL << 48;
+	else
+		ppgtt->vm.total = 1ULL << 32;
 
 	/* From bdw, there is support for read-only pages in the PPGTT. */
 	ppgtt->vm.has_read_only = true;
-- 
2.20.1

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