drm/msm/sde: add writeback ROI support for msmskunk

For HW directly supporting writeback ROI x,y offsets
bypass writeback planes offset recalculation.

Change-Id: I8b38b6026482a4f72607ad74bbec2d3f741b94f8
Signed-off-by: abeykun <abeykun@codeaurora.org>
diff --git a/drivers/gpu/drm/msm/sde/sde_hw_wb.h b/drivers/gpu/drm/msm/sde/sde_hw_wb.h
index e01750b..52a5ee5 100644
--- a/drivers/gpu/drm/msm/sde/sde_hw_wb.h
+++ b/drivers/gpu/drm/msm/sde/sde_hw_wb.h
@@ -24,6 +24,7 @@
 	struct sde_hw_fmt_layout dest;
 	enum sde_intf_mode intf_mode;
 	struct traffic_shaper_cfg ts_cfg;
+	struct sde_rect roi;
 	bool is_secure;
 };
 
@@ -53,6 +54,9 @@
 
 	void (*setup_trafficshaper)(struct sde_hw_wb *ctx,
 		struct sde_hw_wb_cfg *wb);
+
+	void (*setup_roi)(struct sde_hw_wb *ctx,
+		struct sde_hw_wb_cfg *wb);
 };
 
 /**