diff options
Diffstat (limited to 'DuetPkg/BiosVideoThunkDxe/BiosVideo.c')
-rw-r--r-- | DuetPkg/BiosVideoThunkDxe/BiosVideo.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/DuetPkg/BiosVideoThunkDxe/BiosVideo.c b/DuetPkg/BiosVideoThunkDxe/BiosVideo.c index 6a8e55a034..7053a0002c 100644 --- a/DuetPkg/BiosVideoThunkDxe/BiosVideo.c +++ b/DuetPkg/BiosVideoThunkDxe/BiosVideo.c @@ -1043,6 +1043,7 @@ BiosVideoCheckForVbe ( VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING ValidEdidTiming;
EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *GraphicsOutputMode;
+ DEBUG ((EFI_D_INFO, "Enter BiosVideoCheckForVbe()\n"));
//
// Allocate buffer under 1MB for VBE data structures
//
@@ -1095,26 +1096,33 @@ BiosVideoCheckForVbe ( Regs.X.ES = EFI_SEGMENT ((UINTN) BiosVideoPrivate->VbeInformationBlock);
Regs.X.DI = EFI_OFFSET ((UINTN) BiosVideoPrivate->VbeInformationBlock);
+ DEBUG ((EFI_D_INFO, "Before VESA!\n"));
LegacyBiosInt86 (BiosVideoPrivate, 0x10, &Regs);
-
+ DEBUG ((EFI_D_INFO, "Call VESA! Return Status=0x%X\n", Regs.X.AX));
+ DEBUG ((EFI_D_INFO, "Call VESA! VESA Signature =0x%X\n", BiosVideoPrivate->VbeInformationBlock->VESASignature));
+ DEBUG ((EFI_D_INFO, "Call VESA! VESA Version =0x%X\n", BiosVideoPrivate->VbeInformationBlock->VESAVersion));
+
Status = EFI_DEVICE_ERROR;
//
// See if the VESA call succeeded
//
if (Regs.X.AX != VESA_BIOS_EXTENSIONS_STATUS_SUCCESS) {
+ DEBUG ((EFI_D_INFO, "Fail to call VESA! Status=0x%X\n", Regs.X.AX));
return Status;
}
//
// Check for 'VESA' signature
//
if (BiosVideoPrivate->VbeInformationBlock->VESASignature != VESA_BIOS_EXTENSIONS_VESA_SIGNATURE) {
+ DEBUG ((EFI_D_INFO, "Fail to check VESA signature!\n"));
return Status;
}
//
// Check to see if this is VBE 2.0 or higher
//
if (BiosVideoPrivate->VbeInformationBlock->VESAVersion < VESA_BIOS_EXTENSIONS_VERSION_2_0) {
+ DEBUG ((EFI_D_INFO, "VBE version is little than 2.0!\n"));
return Status;
}
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