From 6e3f45e028b36f5c1c95fe4f7e01d41d0887134d Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sat, 7 Feb 2015 10:21:03 +0000
Subject: [PATCH] sna: Use PrimaryOutput as CRTC source when drawable is
 offscreen

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/sna_display.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index 080ee19d..31a0ae9e 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -357,11 +357,17 @@ const struct ust_msc *sna_crtc_last_swap(xf86CrtcPtr crtc)
 
 xf86CrtcPtr sna_mode_first_crtc(struct sna *sna)
 {
-	xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(sna->scrn);
+	rrScrPrivPtr rr = rrGetScrPriv(xf86ScrnToScreen(sna->scrn));
+	if (rr && rr->primaryOutput) {
+		xf86OutputPtr output = rr->primaryOutput->devPrivate;
+		if (output->crtc && to_sna_crtc(output->crtc))
+			return output->crtc;
+	}
+
 	if (sna->mode.num_real_crtc)
-		return config->crtc[0];
-	else
-		return NULL;
+		return XF86_CRTC_CONFIG_PTR(sna->scrn)->crtc[0];
+
+	return NULL;
 }
 
 #ifndef NDEBUG