[Qemu-devel] qemu/hw vga.c vga_int.h

[Fabrice Bellard <fabrice@bellard.org>]

CVSROOT:	/sources/qemu
Module name:	qemu
Changes by:	Fabrice Bellard <bellard>	06/06/13 16:37:40

Modified files:
	hw             : vga.c vga_int.h 

Log message:
	support for Bochs VBE GETCAPS call so that -std-vga works again with new VGA BIOSes - added support for modes up to 1600x1200x32 in -std-vga case

CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/qemu/hw/vga.c?cvsroot=qemu&r1=1.43&r2=1.44
http://cvs.savannah.gnu.org/viewcvs/qemu/hw/vga_int.h?cvsroot=qemu&r1=1.6&r2=1.7

Patches:
Index: vga.c
===================================================================
RCS file: /sources/qemu/qemu/hw/vga.c,v
retrieving revision 1.43
retrieving revision 1.44
diff -u -b -r1.43 -r1.44
--- vga.c	10 May 2006 22:17:36 -0000	1.43
+++ vga.c	13 Jun 2006 16:37:40 -0000	1.44
@@ -378,10 +378,29 @@
     VGAState *s = opaque;
     uint32_t val;
 
-    if (s->vbe_index <= VBE_DISPI_INDEX_NB)
+    if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
+        if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
+            switch(s->vbe_index) {
+                /* XXX: do not hardcode ? */
+            case VBE_DISPI_INDEX_XRES:
+                val = VBE_DISPI_MAX_XRES;
+                break;
+            case VBE_DISPI_INDEX_YRES:
+                val = VBE_DISPI_MAX_YRES;
+                break;
+            case VBE_DISPI_INDEX_BPP:
+                val = VBE_DISPI_MAX_BPP;
+                break;
+            default:
         val = s->vbe_regs[s->vbe_index];
-    else
+                break;
+            }
+        } else {
+            val = s->vbe_regs[s->vbe_index]; 
+        }
+    } else {
         val = 0;
+    }
 #ifdef DEBUG_BOCHS_VBE
     printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
 #endif
@@ -434,7 +453,8 @@
             s->bank_offset = (val << 16);
             break;
         case VBE_DISPI_INDEX_ENABLE:
-            if (val & VBE_DISPI_ENABLED) {
+            if ((val & VBE_DISPI_ENABLED) &&
+                !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
                 int h, shift_control;
 
                 s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 
@@ -464,7 +484,7 @@
                 s->cr[0x13] = s->vbe_line_offset >> 3;
                 /* width */
                 s->cr[0x01] = (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
-                /* height */
+                /* height (only meaningful if < 1024) */
                 h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
                 s->cr[0x12] = h;
                 s->cr[0x07] = (s->cr[0x07] & ~0x42) | 
@@ -1310,11 +1330,19 @@
 {
     int width, height;
     
+#ifdef CONFIG_BOCHS_VBE
+    if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
+        width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
+        height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
+    } else 
+#endif
+    {
     width = (s->cr[0x01] + 1) * 8;
     height = s->cr[0x12] | 
         ((s->cr[0x07] & 0x02) << 7) | 
         ((s->cr[0x07] & 0x40) << 3);
     height = (height + 1);
+    }
     *pwidth = width;
     *pheight = height;
 }

Index: vga_int.h
===================================================================
RCS file: /sources/qemu/qemu/hw/vga_int.h,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -b -r1.6 -r1.7
--- vga_int.h	3 Jul 2005 14:00:51 -0000	1.6
+++ vga_int.h	13 Jun 2006 16:37:40 -0000	1.7
@@ -30,8 +30,9 @@
 /* bochs VBE support */
 #define CONFIG_BOCHS_VBE
 
-#define VBE_DISPI_MAX_XRES              1024
-#define VBE_DISPI_MAX_YRES              768
+#define VBE_DISPI_MAX_XRES              1600
+#define VBE_DISPI_MAX_YRES              1200
+#define VBE_DISPI_MAX_BPP               32
 
 #define VBE_DISPI_INDEX_ID              0x0
 #define VBE_DISPI_INDEX_XRES            0x1
@@ -51,6 +52,8 @@
   
 #define VBE_DISPI_DISABLED              0x00
 #define VBE_DISPI_ENABLED               0x01
+#define VBE_DISPI_GETCAPS               0x02
+#define VBE_DISPI_8BIT_DAC              0x20
 #define VBE_DISPI_LFB_ENABLED           0x40
 #define VBE_DISPI_NOCLEARMEM            0x80
   
@@ -72,7 +75,7 @@
 #endif /* !CONFIG_BOCHS_VBE */
 
 #define CH_ATTR_SIZE (160 * 100)
-#define VGA_MAX_HEIGHT 1024
+#define VGA_MAX_HEIGHT 2048
 
 #define VGA_STATE_COMMON                                                \
     uint8_t *vram_ptr;                                                  \