[SeaBIOS] [PATCH] vgabios: Reorder video modes to work around a Windows bug

[Ladi Prosek]

Windows Server 2016 and Windows 10 RS1 come with a bug in its blue screen
of death rendering logic which prevents it from generating crash dumps.

The bug does not manifest if Windows sees a suitable 32 bpp video mode
before a suitable 24 bpp video mode in the list of modes returned from
vgabios. This commit moves all 32 bpp modes to the front of the list to
make sure that this is always the case.

Signed-off-by: Ladi Prosek <lprosek at redhat.com>
---
 vgasrc/bochsvga.c | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/vgasrc/bochsvga.c b/vgasrc/bochsvga.c
index ec5d101..c5d1511 100644
--- a/vgasrc/bochsvga.c
+++ b/vgasrc/bochsvga.c
@@ -28,6 +28,25 @@ static struct bochsvga_mode
     u16 mode;
     struct vgamode_s info;
 } bochsvga_modes[] VAR16 = {
+    /* 32 bpp BOCHS modes */
+    { 0x140, { MM_DIRECT, 320,  200,  32, 8, 16, SEG_GRAPH } },
+    { 0x141, { MM_DIRECT, 640,  400,  32, 8, 16, SEG_GRAPH } },
+    { 0x142, { MM_DIRECT, 640,  480,  32, 8, 16, SEG_GRAPH } },
+    { 0x143, { MM_DIRECT, 800,  600,  32, 8, 16, SEG_GRAPH } },
+    { 0x144, { MM_DIRECT, 1024, 768,  32, 8, 16, SEG_GRAPH } },
+    { 0x145, { MM_DIRECT, 1280, 1024, 32, 8, 16, SEG_GRAPH } },
+    { 0x147, { MM_DIRECT, 1600, 1200, 32, 8, 16, SEG_GRAPH } },
+    { 0x14c, { MM_DIRECT, 1152, 864,  32, 8, 16, SEG_GRAPH } },
+    { 0x177, { MM_DIRECT, 1280, 768,  32, 8, 16, SEG_GRAPH } },
+    { 0x17a, { MM_DIRECT, 1280, 800,  32, 8, 16, SEG_GRAPH } },
+    { 0x17d, { MM_DIRECT, 1280, 960,  32, 8, 16, SEG_GRAPH } },
+    { 0x180, { MM_DIRECT, 1440, 900,  32, 8, 16, SEG_GRAPH } },
+    { 0x183, { MM_DIRECT, 1400, 1050, 32, 8, 16, SEG_GRAPH } },
+    { 0x186, { MM_DIRECT, 1680, 1050, 32, 8, 16, SEG_GRAPH } },
+    { 0x189, { MM_DIRECT, 1920, 1200, 32, 8, 16, SEG_GRAPH } },
+    { 0x18c, { MM_DIRECT, 2560, 1600, 32, 8, 16, SEG_GRAPH } },
+    { 0x18f, { MM_DIRECT, 1280, 720,  32, 8, 16, SEG_GRAPH } },
+    { 0x192, { MM_DIRECT, 1920, 1080, 32, 8, 16, SEG_GRAPH } },
     /* standard modes */
     { 0x100, { MM_PACKED, 640,  400,  8,  8, 16, SEG_GRAPH } },
     { 0x101, { MM_PACKED, 640,  480,  8,  8, 16, SEG_GRAPH } },
@@ -56,50 +75,32 @@ static struct bochsvga_mode
     { 0x11D, { MM_DIRECT, 1600, 1200, 15, 8, 16, SEG_GRAPH } },
     { 0x11E, { MM_DIRECT, 1600, 1200, 16, 8, 16, SEG_GRAPH } },
     { 0x11F, { MM_DIRECT, 1600, 1200, 24, 8, 16, SEG_GRAPH } },
-    /* BOCHS modes */
-    { 0x140, { MM_DIRECT, 320,  200,  32, 8, 16, SEG_GRAPH } },
-    { 0x141, { MM_DIRECT, 640,  400,  32, 8, 16, SEG_GRAPH } },
-    { 0x142, { MM_DIRECT, 640,  480,  32, 8, 16, SEG_GRAPH } },
-    { 0x143, { MM_DIRECT, 800,  600,  32, 8, 16, SEG_GRAPH } },
-    { 0x144, { MM_DIRECT, 1024, 768,  32, 8, 16, SEG_GRAPH } },
-    { 0x145, { MM_DIRECT, 1280, 1024, 32, 8, 16, SEG_GRAPH } },
+    /* 8, 15, 16, and 24 bpp BOCHS modes */
     { 0x146, { MM_PACKED, 320,  200,  8,  8, 16, SEG_GRAPH } },
-    { 0x147, { MM_DIRECT, 1600, 1200, 32, 8, 16, SEG_GRAPH } },
     { 0x148, { MM_PACKED, 1152, 864,  8,  8, 16, SEG_GRAPH } },
     { 0x149, { MM_DIRECT, 1152, 864,  15, 8, 16, SEG_GRAPH } },
     { 0x14a, { MM_DIRECT, 1152, 864,  16, 8, 16, SEG_GRAPH } },
     { 0x14b, { MM_DIRECT, 1152, 864,  24, 8, 16, SEG_GRAPH } },
-    { 0x14c, { MM_DIRECT, 1152, 864,  32, 8, 16, SEG_GRAPH } },
     { 0x175, { MM_DIRECT, 1280, 768,  16, 8, 16, SEG_GRAPH } },
     { 0x176, { MM_DIRECT, 1280, 768,  24, 8, 16, SEG_GRAPH } },
-    { 0x177, { MM_DIRECT, 1280, 768,  32, 8, 16, SEG_GRAPH } },
     { 0x178, { MM_DIRECT, 1280, 800,  16, 8, 16, SEG_GRAPH } },
     { 0x179, { MM_DIRECT, 1280, 800,  24, 8, 16, SEG_GRAPH } },
-    { 0x17a, { MM_DIRECT, 1280, 800,  32, 8, 16, SEG_GRAPH } },
     { 0x17b, { MM_DIRECT, 1280, 960,  16, 8, 16, SEG_GRAPH } },
     { 0x17c, { MM_DIRECT, 1280, 960,  24, 8, 16, SEG_GRAPH } },
-    { 0x17d, { MM_DIRECT, 1280, 960,  32, 8, 16, SEG_GRAPH } },
     { 0x17e, { MM_DIRECT, 1440, 900,  16, 8, 16, SEG_GRAPH } },
     { 0x17f, { MM_DIRECT, 1440, 900,  24, 8, 16, SEG_GRAPH } },
-    { 0x180, { MM_DIRECT, 1440, 900,  32, 8, 16, SEG_GRAPH } },
     { 0x181, { MM_DIRECT, 1400, 1050, 16, 8, 16, SEG_GRAPH } },
     { 0x182, { MM_DIRECT, 1400, 1050, 24, 8, 16, SEG_GRAPH } },
-    { 0x183, { MM_DIRECT, 1400, 1050, 32, 8, 16, SEG_GRAPH } },
     { 0x184, { MM_DIRECT, 1680, 1050, 16, 8, 16, SEG_GRAPH } },
     { 0x185, { MM_DIRECT, 1680, 1050, 24, 8, 16, SEG_GRAPH } },
-    { 0x186, { MM_DIRECT, 1680, 1050, 32, 8, 16, SEG_GRAPH } },
     { 0x187, { MM_DIRECT, 1920, 1200, 16, 8, 16, SEG_GRAPH } },
     { 0x188, { MM_DIRECT, 1920, 1200, 24, 8, 16, SEG_GRAPH } },
-    { 0x189, { MM_DIRECT, 1920, 1200, 32, 8, 16, SEG_GRAPH } },
     { 0x18a, { MM_DIRECT, 2560, 1600, 16, 8, 16, SEG_GRAPH } },
     { 0x18b, { MM_DIRECT, 2560, 1600, 24, 8, 16, SEG_GRAPH } },
-    { 0x18c, { MM_DIRECT, 2560, 1600, 32, 8, 16, SEG_GRAPH } },
     { 0x18d, { MM_DIRECT, 1280, 720,  16, 8, 16, SEG_GRAPH } },
     { 0x18e, { MM_DIRECT, 1280, 720,  24, 8, 16, SEG_GRAPH } },
-    { 0x18f, { MM_DIRECT, 1280, 720,  32, 8, 16, SEG_GRAPH } },
     { 0x190, { MM_DIRECT, 1920, 1080, 16, 8, 16, SEG_GRAPH } },
     { 0x191, { MM_DIRECT, 1920, 1080, 24, 8, 16, SEG_GRAPH } },
-    { 0x192, { MM_DIRECT, 1920, 1080, 32, 8, 16, SEG_GRAPH } },
 };
 
 static int dispi_found VAR16 = 0;
-- 
2.5.5