From 56126d00503fd9bc6fe30781ecddb2fb67de817b Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 5 May 2014 18:17:01 +0100
Subject: [PATCH] sna: Refine hints to allow inplace writes whilst compositing
 aligned traps

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/sna_trapezoids_boxes.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/sna/sna_trapezoids_boxes.c b/src/sna/sna_trapezoids_boxes.c
index 898efb5e..335b2ceb 100644
--- a/src/sna/sna_trapezoids_boxes.c
+++ b/src/sna/sna_trapezoids_boxes.c
@@ -209,8 +209,11 @@ composite_aligned_boxes(struct sna *sna,
 		     __FUNCTION__));
 
 		flags = MOVE_READ | MOVE_WRITE;
-		if (n == 1 && op <= PictOpSrc)
-			flags = MOVE_WRITE | MOVE_INPLACE_HINT;
+		if (op <= PictOpSrc) {
+			flags |= MOVE_INPLACE_HINT;
+			if (n == 1)
+				flags &= ~MOVE_READ;
+		}
 
 		if (!sna_drawable_move_region_to_cpu(dst->pDrawable, &clip, flags))
 			goto done;