xf86-video-intel: src/sna/sna_display.c

[Chris Wilson]

 src/sna/sna_display.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

New commits:
commit f132452da14fd09a2a3926cc9c034cb2e8c2f1a9
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Mar 19 07:57:30 2013 +0000

    sna: Ignore vsync waits on tiny scanline ranges
    
    If the update is only a couple of lines tall, any tear will not be
    visible - so just ignore programming the wait into the GPU.
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index a80a3c1..abb340a 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -3005,7 +3005,7 @@ sna_wait_for_scanline(struct sna *sna,
 	if (y2 > crtc->bounds.y2 - crtc->bounds.y1)
 		y2 = crtc->bounds.y2 - crtc->bounds.y1;
 	DBG(("%s: clipped range = %d, %d\n", __FUNCTION__, y1, y2));
-	if (y2 <= y1)
+	if (y2 <= y1 + 4)
 		return false;
 
 	full_height = y1 == 0 && y2 == crtc->bounds.y2 - crtc->bounds.y1;