From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 8 Nov 2013 12:54:01 +0000 (+0000)
Subject: intel-virtual-output: Perform an explicit sync
X-Git-Tag: 2.99.906~16^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=969b064f74e0058a49afa17287184005d1e11402;p=platform%2Fupstream%2Fxf86-video-intel.git

intel-virtual-output: Perform an explicit sync

If we fail to track rendering using ShmCompletionEvents and begin to
drop frames, insert an explicit XSync.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---

diff --git a/tools/virtual.c b/tools/virtual.c
index 71d18f5..74a03e8 100644
--- a/tools/virtual.c
+++ b/tools/virtual.c
@@ -1359,8 +1359,14 @@ static int clone_paint(struct clone *c)
 		while (XPending(c->dst.dpy))
 			;
 
-		if (c->dst.serial > LastKnownRequestProcessed(c->dst.dpy))
-			return EAGAIN;
+		if (c->dst.serial > LastKnownRequestProcessed(c->dst.dpy)) {
+			if (c->dst.display->send++ == 0)
+				return EAGAIN;
+
+			XSync(c->dst.dpy, False);
+			c->dst.display->flush = 0;
+			c->dst.display->send = 0;
+		}
 	}
 
 	if (FORCE_FULL_REDRAW) {