From 4aa77378de69efdc10bced6ba650b0ebff50c112 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Tue, 26 Nov 2013 12:06:57 -0800
Subject: [PATCH] present: Clear target_crtc if driver lacks Present support
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If the driver doesn't have the necessary hooks for Present, then the
target_crtc needs to be set to NULL to make sure the extension uses
the present_fake code.

Signed-off-by: Keith Packard <keithp@keithp.com>
Tested-by: Fredrik Höglund <fredrik@kde.org>
Reviewed-by: Adam Jackson <ajax@redhat.com>
---
 present/present.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/present/present.c b/present/present.c
index 76e12ed5d..3fd5e8bb1 100644
--- a/present/present.c
+++ b/present/present.c
@@ -594,7 +594,9 @@ present_pixmap(WindowPtr window,
     if (!window_priv)
         return BadAlloc;
 
-    if (!target_crtc) {
+    if (!screen_priv || !screen_priv->info)
+        target_crtc = NULL;
+    else if (!target_crtc) {
         /* Update the CRTC if we have a pixmap or we don't have a CRTC
          */
         if (!pixmap)