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qxl-wddm-dod: Load best know defaults for video mode at driver's start

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Even if initial display resolution is not available at driver start, try
to find it in the registry. Then the driver can prevent black screen
on uninstall/disable also when it was installed on UEFI machine after
the production driver 0.18 which did not report valid video mode.

Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
Acked-by: Marek Kedzierski <mkedzier@redhat.com>
This commit is contained in:
Yuri Benditovich 2019-01-25 09:48:52 +02:00 committed by Frediano Ziglio
parent 61193f9cab
commit 7f81d670e4
1 changed files with 32 additions and 5 deletions
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37
qxldod/QxlDod.cpp
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@ -5169,6 +5169,37 @@ UINT SpiceFromPixelFormat(D3DDDIFORMAT Format)
}
}
// Width and Height values for initial video mode are populated by
// display class driver upon switch from boot display to operational one.
// This is not documented and can be changed in future, but
// present under the same key in Win8.1/Win10/2016/2019
static void RetrieveDisplayDefaults(DXGK_DISPLAY_INFORMATION& DispInfo)
{
PAGED_CODE();
RTL_QUERY_REGISTRY_TABLE QueryTable[3] = {};
QueryTable[0].Flags = QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_TYPECHECK | RTL_QUERY_REGISTRY_REQUIRED;
QueryTable[0].DefaultType = QueryTable[1].DefaultType = REG_DWORD << 24;
QueryTable[0].Name = L"Height";
QueryTable[0].EntryContext = &DispInfo.Height;
QueryTable[1].Name = L"Width";
QueryTable[1].EntryContext = &DispInfo.Width;
NTSTATUS status = RtlQueryRegistryValues(RTL_REGISTRY_CONTROL, L"BGFX", QueryTable, NULL, NULL);
if (NT_SUCCESS(status))
{
DbgPrint(TRACE_LEVEL_INFORMATION, ("%s: %dx%d\n", __FUNCTION__, DispInfo.Width, DispInfo.Height));
}
else
{
DbgPrint(TRACE_LEVEL_INFORMATION, ("%s: status = %X\n", __FUNCTION__, status));
DispInfo.Width = INITIAL_WIDTH;
DispInfo.Height = INITIAL_HEIGHT;
}
DispInfo.ColorFormat = D3DDDIFMT_X8R8G8B8;
DispInfo.Pitch = DispInfo.Width * BPPFromPixelFormat(DispInfo.ColorFormat) / BITS_PER_BYTE;
DispInfo.TargetId = DispInfo.AcpiId = 0;
}
NTSTATUS HwDeviceInterface::AcquireDisplayInfo(DXGK_DISPLAY_INFORMATION& DispInfo)
{
PAGED_CODE();
@ -5188,11 +5219,7 @@ NTSTATUS HwDeviceInterface::AcquireDisplayInfo(DXGK_DISPLAY_INFORMATION& DispInf
if (DispInfo.Width == 0)
{
DbgPrint(TRACE_LEVEL_WARNING, ("QxlDod::AcquireDisplayInfo has zero width!\n"));
DispInfo.ColorFormat = D3DDDIFMT_A8R8G8B8;
DispInfo.Width = INITIAL_WIDTH;
DispInfo.Height = INITIAL_HEIGHT;
DispInfo.Pitch = DispInfo.Width * BPPFromPixelFormat(DispInfo.ColorFormat) / BITS_PER_BYTE;
DispInfo.TargetId = 0;
RetrieveDisplayDefaults(DispInfo);
}
return Status;
}