[Intel-gfx] [PATCH v2] drm/i915: Clean up skl_plane_has_planar()

[Dhinakaran Pandiyan]

skl_plane_has_planar is hard to read, simplify the logic by checking for
support in the order of platform, pipe and plane.

No change in functionality intended.
v2: Fix logic for primary plane (Ville)

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 27 +++++++++------------------
 1 file changed, 9 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 30fdfd1a3037..178552db1552 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13622,24 +13622,15 @@ static bool skl_plane_has_fbc(struct drm_i915_private *dev_priv,
 bool skl_plane_has_planar(struct drm_i915_private *dev_priv,
 			  enum pipe pipe, enum plane_id plane_id)
 {
-	if (plane_id == PLANE_PRIMARY) {
-		if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
-			return false;
-		else if ((INTEL_GEN(dev_priv) == 9 && pipe == PIPE_C) &&
-			 !IS_GEMINILAKE(dev_priv))
-			return false;
-	} else if (plane_id >= PLANE_SPRITE0) {
-		if (plane_id == PLANE_CURSOR)
-			return false;
-		if (IS_GEMINILAKE(dev_priv) || INTEL_GEN(dev_priv) == 10) {
-			if (plane_id != PLANE_SPRITE0)
-				return false;
-		} else {
-			if (plane_id != PLANE_SPRITE0 || pipe == PIPE_C ||
-			    IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
-				return false;
-		}
-	}
+	if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
+		return false;
+
+	if (INTEL_GEN(dev_priv) == 9 && !IS_GEMINILAKE(dev_priv) && pipe == PIPE_C)
+		return false;
+
+	if (plane_id != PLANE_PRIMARY && plane_id != PLANE_SPRITE0)
+		return false;
+
 	return true;
 }
 
-- 
2.17.1