[Intel-gfx] [PATCH] drm/i915: perform scaler_id check for skl+

[Chandra Konduru]

Scaler id is added for skylake to handle its shared scalers.
This is not applicable for platforms before SKL. This patch limits
the scaler_id check during intel_pipe_config_compare to platforms
SKL and above.

Signed-off-by: Chandra Konduru <chandra.konduru at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c297cdc..fc1b7f9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11846,7 +11846,9 @@ intel_pipe_config_compare(struct drm_device *dev,
 		PIPE_CONF_CHECK_I(pch_pfit.size);
 	}
 
-	PIPE_CONF_CHECK_I(scaler_state.scaler_id);
+	if (INTEL_INFO(dev)->gen >= 9) {
+		PIPE_CONF_CHECK_I(scaler_state.scaler_id);
+	}
 
 	/* BDW+ don't expose a synchronous way to read the state */
 	if (IS_HASWELL(dev))
-- 
1.7.9.5