[Intel-gfx] [PATCH 4/6] drm/i915: Require fence only for FBC capable planes

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

As only a subset of primary planes are FBC capable there's no need
to waste fences on all of them. So let's skip the fence if the plane
isn't even fbc capable.

In the future we might extend this to skip the fence even for FBC
capable planes if the crtc and/or plane state isn't suitable
for FBC.

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8aeb6b686bac..b4048b425ffd 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2076,7 +2076,7 @@ static bool intel_plane_uses_fence(const struct intel_plane_state *plane_state)
 	if (i915_gem_object_get_tiling(obj) == I915_TILING_NONE)
 		return false;
 
-	return INTEL_GEN(dev_priv) < 4 || plane->id == PLANE_PRIMARY;
+	return INTEL_GEN(dev_priv) < 4 || plane->has_fbc;
 }
 
 struct i915_vma *
-- 
2.13.6