[Nouveau] [PATCH] drm/nouveau: wait for vblank on page flipping

[Maarten Lankhorst]

ARRRRRRRRRRRRRRRRRRRRRRRRGGGGGGGGGGGGGHHHHHHHHHHhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at canonical.com>

---
diff --git a/drivers/gpu/drm/nouveau/core/core/event.c b/drivers/gpu/drm/nouveau/core/core/event.c
index 6d01e0f..f56bd56 100644
--- a/drivers/gpu/drm/nouveau/core/core/event.c
+++ b/drivers/gpu/drm/nouveau/core/core/event.c
@@ -593,7 +597,7 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 
 	/* Emit a page flip */
 	if (nv_device(drm->device)->card_type >= NV_50) {
-		ret = nv50_display_flip_next(crtc, fb, chan, 0);
+		ret = nv50_display_flip_next(crtc, fb, chan, 1);
 		if (ret) {
 			mutex_unlock(&chan->cli->mutex);
 			goto fail_unreserve;