[Intel-gfx] [PATCH] drm/i915: Don't initialize plane_to_crtc_mapping[] on SKL+

[Ville Syrjala]

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

We don't use the enum i9xx_plane_id namespace on SKL+ anymore, so
do not initialize the related plane_to_crtc_mapping[] table either.

Actually the only remaining user of that table is the pre-g4x
watermark code, but no harm in initializing the table on all
pre-SKL platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fb08590b4d40..435462bfc719 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13572,10 +13572,17 @@ static int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
 	/* initialize shared scalers */
 	intel_crtc_init_scalers(intel_crtc, crtc_state);
 
-	BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
-	       dev_priv->plane_to_crtc_mapping[primary->i9xx_plane] != NULL);
-	dev_priv->plane_to_crtc_mapping[primary->i9xx_plane] = intel_crtc;
-	dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = intel_crtc;
+	BUG_ON(pipe >= ARRAY_SIZE(dev_priv->pipe_to_crtc_mapping) ||
+	       dev_priv->pipe_to_crtc_mapping[pipe] != NULL);
+	dev_priv->pipe_to_crtc_mapping[pipe] = intel_crtc;
+
+	if (INTEL_GEN(dev_priv) < 9) {
+		enum i9xx_plane_id i9xx_plane = primary->i9xx_plane;
+
+		BUG_ON(i9xx_plane >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
+		       dev_priv->plane_to_crtc_mapping[i9xx_plane] != NULL);
+		dev_priv->plane_to_crtc_mapping[i9xx_plane] = intel_crtc;
+	}
 
 	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
 
-- 
2.16.1