[PATCH 04/27] drm/i915/kbl: Add WaSkipStolenMemoryFirstPage for A0

Mika Kuoppala
2016-06-07T14:24:15Z

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 <mika.kuoppala@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
---
drivers/gpu/drm/i915/i915_gem_stolen.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index f9253f2b7ba0..e9cd82290408 100644
--- 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 (IS_GEN8(dev_priv) && 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);