From ec10cef592b7a3d1dc3c4949778e72e8cd156245 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 12 Aug 2014 10:52:12 +0100
Subject: [PATCH] sna: Only apply a DPMS change for an enabled CRTC

Mostly paranoia, but we need to validate that the stored mode is valid
before applying the modeset.

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

diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index f723481e..04e9a414 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -2157,6 +2157,7 @@ sna_crtc_dpms(xf86CrtcPtr crtc, int mode)
 	priv->dpms_mode = mode;
 
 	if (mode == DPMSModeOn &&
+	    crtc->enabled &&
 	    priv->bo == NULL &&
 	    !__sna_crtc_set_mode(crtc))
 		mode = DPMSModeOff;