[Intel-gfx] [RFC PATCH 25/42] drm/i915: set num_fence_regs to 0 if there is no aperture

[Matthew Auld]

From: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>

We can't fence anything without aperture.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 43e813d0e647..e59f38e00f0d 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -5666,8 +5666,10 @@ i915_gem_load_init_fences(struct drm_i915_private *dev_priv)
 {
 	int i;
 
-	if (INTEL_GEN(dev_priv) >= 7 && !IS_VALLEYVIEW(dev_priv) &&
-	    !IS_CHERRYVIEW(dev_priv))
+	if (!HAS_MAPPABLE_APERTURE(dev_priv))
+		dev_priv->num_fence_regs = 0;
+	else if (INTEL_GEN(dev_priv) >= 7 && !IS_VALLEYVIEW(dev_priv) &&
+		 !IS_CHERRYVIEW(dev_priv))
 		dev_priv->num_fence_regs = 32;
 	else if (INTEL_GEN(dev_priv) >= 4 ||
 		 IS_I945G(dev_priv) || IS_I945GM(dev_priv) ||
-- 
2.20.1