[Intel-gfx] [PATCH 3/5] drm/i915: Require fence only for FBC capable planes

[Ville Syrjala]

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

Since 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.

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 f4b773a4caf7..3b7021b39fdf 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2163,7 +2163,7 @@ static bool intel_plane_needs_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