Fix regression causing screen tearing with xserver 1.20.5

Resolves: rhbz#1726419

0001-Revert-present-scmd-Check-that-the-flip-and-screen-p.patch

@@ -0,0 +1,49 @@
+From 8d2c776b2e14b3edcb27ced96cda7bede82c39cc Mon Sep 17 00:00:00 2001
+From: Olivier Fourdan <ofourdan@redhat.com>
+Date: Thu, 4 Jul 2019 08:42:15 +0200
+Subject: [PATCH xserver] Revert "present/scmd: Check that the flip and screen
+ pixmap pitches match"
+
+This reverts commit ef91da2757050652c724f6e674e8b1acf5d0cb31.
+Closes: https://gitlab.freedesktop.org/xorg/xserver/issues/839
+---
+ present/present_scmd.c | 8 +++-----
+ 1 file changed, 3 insertions(+), 5 deletions(-)
+
+diff --git a/present/present_scmd.c b/present/present_scmd.c
+index 7c2f80997..8417d0925 100644
+--- a/present/present_scmd.c
++++ b/present/present_scmd.c
+@@ -78,7 +78,7 @@ present_check_flip(RRCrtcPtr            crtc,
+                    PresentFlipReason   *reason)
+ {
+     ScreenPtr                   screen = window->drawable.pScreen;
+-    PixmapPtr                   screen_pixmap, window_pixmap;
++    PixmapPtr                   window_pixmap;
+     WindowPtr                   root = screen->root;
+     present_screen_priv_ptr     screen_priv = present_screen_priv(screen);
+ 
+@@ -99,9 +99,8 @@ present_check_flip(RRCrtcPtr            crtc,
+         return FALSE;
+ 
+     /* Make sure the window hasn't been redirected with Composite */
+-    screen_pixmap = screen->GetScreenPixmap(screen);
+     window_pixmap = screen->GetWindowPixmap(window);
+-    if (window_pixmap != screen_pixmap &&
++    if (window_pixmap != screen->GetScreenPixmap(screen) &&
+         window_pixmap != screen_priv->flip_pixmap &&
+         window_pixmap != present_flip_pending_pixmap(screen))
+         return FALSE;
+@@ -127,8 +126,7 @@ present_check_flip(RRCrtcPtr            crtc,
+         window->drawable.x != pixmap->screen_x || window->drawable.y != pixmap->screen_y ||
+ #endif
+         window->drawable.width != pixmap->drawable.width ||
+-        window->drawable.height != pixmap->drawable.height ||
+-        pixmap->devKind != screen_pixmap->devKind) {
++        window->drawable.height != pixmap->drawable.height) {
+         return FALSE;
+     }
+ 
+-- 
+2.21.0
+

xorg-x11-server.spec

@@ -46,7 +46,7 @@
 Summary:   X.Org X11 X server
 Name:      xorg-x11-server
 Version:   1.20.5
-Release:   3%{?gitdate:.%{gitdate}}%{?dist}
+Release:   4%{?gitdate:.%{gitdate}}%{?dist}
 URL:       http://www.x.org
 License:   MIT
 
@@ -114,6 +114,10 @@ Patch27: 0001-xwayland-Check-status-in-GBM-pixmap-creation.patch
 Patch28: 0001-glamor-Make-pixmap-exportable-from-gbm_bo_from_pixma.patch
 Patch29: 0001-xwayland-Reset-scheduled-frames-after-hiding-tablet-.patch
 
+# https://gitlab.freedesktop.org/xorg/xserver/issues/839
+# https://bugzilla.redhat.com/1726419
+Patch30: 0001-Revert-present-scmd-Check-that-the-flip-and-screen-p.patch
+
 BuildRequires: systemtap-sdt-devel
 BuildRequires: git
 BuildRequires: automake autoconf libtool pkgconfig
@@ -538,6 +542,10 @@ find %{inst_srcdir}/hw/xfree86 -name \*.c -delete
 
 
 %changelog
+* Mon Jul  8 2019 Olivier Fourdan <ofourdan@redhat.com> 1.20.5-4
+- Fix regression causing screen tearing with upstream xserver 1.20.5
+  (rhbz#1726419)
+
 * Fri Jun 28 2019 Olivier Fourdan <ofourdan@redhat.com> 1.20.5-3
 - Remove atomic downstream patches causing regressions (#1714981, #1723715)
 - Xwayland crashes (#1708119, #1691745)