commit b9fd11b86779b1fe7fe2881c6e312a028e20e67c
author Benjamin Herrenschmidt <benh@kernel.crashing.org> Mon Jul 07 10:28:39 2014 +1000
committer Gerd Hoffmann <kraxel@redhat.com> Tue Dec 16 15:14:42 2014 +0100
tree 5e4d75819c7e0afe8bd05b7e8b71a5e72f3fd5d3
parent 5508099397c480f1c3b4f14b0e64593ebe284b26

cirrus: Force use of shadow pixmap when HW cursor is enabled

The HW cursor cannot be painted on a shared surface. This fixes HW
cursor display in Windows NT 4.0 and Windows 98.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/display/cirrus_vga.c

diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
index 2725264..686b062 100644
--- a/hw/display/cirrus_vga.c
+++ b/hw/display/cirrus_vga.c
@@ -1351,7 +1351,6 @@
     case 0x0d:			// VCLK 2
     case 0x0e:			// VCLK 3
     case 0x0f:			// DRAM Control
-    case 0x12:			// Graphics Cursor Attribute
     case 0x13:			// Graphics Cursor Pattern Address
     case 0x14:			// Scratch Register 2
     case 0x15:			// Scratch Register 3
@@ -1370,6 +1369,14 @@
 	       s->vga.sr_index, val);
 #endif
 	break;
+    case 0x12:			// Graphics Cursor Attribute
+	s->vga.sr[0x12] = val;
+        s->vga.force_shadow = !!(val & CIRRUS_CURSOR_SHOW);
+#ifdef DEBUG_CIRRUS
+        printf("cirrus: cursor ctl SR12=%02x (force shadow: %d)\n",
+               val, s->vga.force_shadow);
+#endif
+        break;
     case 0x17:			// Configuration Readback and Extended Control
 	s->vga.sr[s->vga.sr_index] = (s->vga.sr[s->vga.sr_index] & 0x38)
                                    | (val & 0xc7);