drm/i915/kbl: Add WaSkipStolenMemoryFirstPage for A0

We need this for kbl a0 boards. Note that this should be also
for bxt A0 but we omit that on purpose as bxt A0's are
out of fashion already.

References: HSD#1912158, HSD#4393097
Signed-off-by: Mika Kuoppala <[email protected]>
Reviewed-by: Matthew Auld <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 6e4f10c33a8bd0df4412bc31c0f11930e0228123)
Signed-off-by: Mika Kuoppala <[email protected]>

diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index b7ce963fb8f8d23345cab6cf0b6e4e446e6e1b3c..44004e3f09e446d108f635444ed9c67818deed7f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -55,8 +55,10 @@ int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,
                return -ENODEV;
 
        /* See the comment at the drm_mm_init() call for more about this check.
-        * WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */
-       if (INTEL_INFO(dev_priv)->gen == 8 && start < 4096)
+        * WaSkipStolenMemoryFirstPage:bdw,chv,kbl (incomplete)
+        */
+       if (start < 4096 && (IS_GEN8(dev_priv) ||
+                            IS_KBL_REVID(dev_priv, 0, KBL_REVID_A0)))
                start = 4096;
 
        mutex_lock(&dev_priv->mm.stolen_lock);