drm/i915: Nuke ironlake_plane_ctl()

Share the code to compute the primary plane control register value
between the i9xx and ilk codepaths as the differences are minimal.
Actually there are no differences between g4x and ilk, so the
current split doesn't really make any sense.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170323192712.30682-3-ville.syrjala@linux.intel.comReviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_display.c

@@ -2974,9 +2974,13 @@ static u32 i9xx_plane_ctl(const struct intel_crtc_state *crtc_state,
 
 	dspcntr = DISPLAY_PLANE_ENABLE | DISPPLANE_GAMMA_ENABLE;
 
-	if (IS_G4X(dev_priv))
+	if (IS_G4X(dev_priv) || IS_GEN5(dev_priv) ||
+	    IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv))
 		dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
 
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		dspcntr |= DISPPLANE_PIPE_CSC_ENABLE;
+
 	if (INTEL_GEN(dev_priv) < 4) {
 		if (crtc->pipe == PIPE_B)
 			dspcntr |= DISPPLANE_SEL_PIPE_B;
@@ -3119,56 +3123,6 @@ static void i9xx_disable_primary_plane(struct drm_plane *primary,
 	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 }
 
-static u32 ironlake_plane_ctl(const struct intel_crtc_state *crtc_state,
-			      const struct intel_plane_state *plane_state)
-{
-	struct drm_i915_private *dev_priv =
-		to_i915(plane_state->base.plane->dev);
-	const struct drm_framebuffer *fb = plane_state->base.fb;
-	unsigned int rotation = plane_state->base.rotation;
-	u32 dspcntr;
-
-	dspcntr = DISPLAY_PLANE_ENABLE | DISPPLANE_GAMMA_ENABLE;
-
-	if (!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv))
-		dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
-
-	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		dspcntr |= DISPPLANE_PIPE_CSC_ENABLE;
-
-	switch (fb->format->format) {
-	case DRM_FORMAT_C8:
-		dspcntr |= DISPPLANE_8BPP;
-		break;
-	case DRM_FORMAT_RGB565:
-		dspcntr |= DISPPLANE_BGRX565;
-		break;
-	case DRM_FORMAT_XRGB8888:
-		dspcntr |= DISPPLANE_BGRX888;
-		break;
-	case DRM_FORMAT_XBGR8888:
-		dspcntr |= DISPPLANE_RGBX888;
-		break;
-	case DRM_FORMAT_XRGB2101010:
-		dspcntr |= DISPPLANE_BGRX101010;
-		break;
-	case DRM_FORMAT_XBGR2101010:
-		dspcntr |= DISPPLANE_RGBX101010;
-		break;
-	default:
-		MISSING_CASE(fb->format->format);
-		return 0;
-	}
-
-	if (fb->modifier == I915_FORMAT_MOD_X_TILED)
-		dspcntr |= DISPPLANE_TILED;
-
-	if (rotation & DRM_ROTATE_180)
-		dspcntr |= DISPPLANE_ROTATE_180;
-
-	return dspcntr;
-}
-
 static void ironlake_update_primary_plane(struct drm_plane *primary,
 					  const struct intel_crtc_state *crtc_state,
 					  const struct intel_plane_state *plane_state)
@@ -3186,7 +3140,7 @@ static void ironlake_update_primary_plane(struct drm_plane *primary,
 	int y = plane_state->base.src.y1 >> 16;
 	unsigned long irqflags;
 
-	dspcntr = ironlake_plane_ctl(crtc_state, plane_state);
+	dspcntr = i9xx_plane_ctl(crtc_state, plane_state);
 
 	intel_add_fb_offsets(&x, &y, plane_state, 0);