disp: msm: sde: add plane staging management for 4LM topologies

When a 4LM topology is used each plane attached to a CRTC
is tagged with a L/R layout value and an offset value
depending on where destination X coordinate lands on the display.
The layout information is used to determine SSPP to LM
pair mapping and local coordinate space.

This change also handles source-split and Z-order
validation checks for planes staged on different mixer
pairs.

Change-Id: I1b20223388e65fc36a8b379ad9df23a277fcd1a5
Signed-off-by: Amine Najahi <anajahi@codeaurora.org>

msm/sde/sde_plane.h

@@ -43,6 +43,21 @@
 		SDE_PLANE_DIRTY_DMA_GC)
 #define SDE_PLANE_DIRTY_ALL	(0xFFFFFFFF & ~(SDE_PLANE_DIRTY_CP))
 
+/**
+ * enum sde_layout
+ * Describes SSPP to LM staging layout when using more than 1 pair of LMs
+ * @SDE_LAYOUT_NONE    : SSPPs to LMs staging layout not enabled
+ * @SDE_LAYOUT_LEFT    : SSPPs will be staged on left two LMs
+ * @SDE_LAYOUT_RIGHT   : SSPPs will be staged on right two LMs
+ * @SDE_LAYOUT_MAX     :
+ */
+enum sde_layout {
+	SDE_LAYOUT_NONE = 0,
+	SDE_LAYOUT_LEFT,
+	SDE_LAYOUT_RIGHT,
+	SDE_LAYOUT_MAX,
+};
+
 /**
  * enum sde_plane_sclcheck_state - User scaler data status
  *
@@ -79,6 +94,8 @@ enum sde_plane_sclcheck_state {
  * @defer_prepare_fb:	indicate if prepare_fb call was deferred
  * @pipe_order_flags: contains pipe order flags:
  *			SDE_SSPP_RIGHT - right pipe in source split pair
+ * @layout_offset:	horizontal layout offset for global coordinate
+ * @layout:             layout for topology requiring more than 1 lm pair.
  * @scaler3_cfg: configuration data for scaler3
  * @pixel_ext: configuration data for pixel extensions
  * @scaler_check_state: indicates status of user provided pixel extension data
@@ -103,6 +120,8 @@ struct sde_plane_state {
 	bool pending;
 	bool defer_prepare_fb;
 	uint32_t pipe_order_flags;
+	int layout_offset;
+	enum sde_layout layout;
 
 	/* scaler configuration */
 	struct sde_hw_scaler3_cfg scaler3_cfg;