nefarius/qxl-wddm-dod
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qxl-wddm-dod: Preparation for VSync activation

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Prepare all the procedures needed for VSync feature but
do not turn it on yet. Manual uncomment still required to
enable it.
Advanced users may enable VSync feature and report functional
problem with it. The driver is expected to pass all the formal
tests under HLK 1607 with device rev.3 and rev.4 but with
device rev.4 on setups with high load or long round-trip delay
video system may detect timeout during rendering operation
and disable the driver with error 43.

Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
Acked-by: Frediano Ziglio <fziglio@redhat.com>
This commit is contained in:
yuri.benditovich@daynix.com 2017-02-22 15:38:49 +02:00 committed by Frediano Ziglio
parent db40bfd439
commit c0506bcf5d
2 changed files with 79 additions and 0 deletions
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64
qxldod/driver.cpp
View File

@ -32,6 +32,31 @@ DriverEntry(
DbgPrint(TRACE_LEVEL_FATAL, ("---> KMDOD build on on %s %s\n", __DATE__, __TIME__));
RTL_OSVERSIONINFOW versionInfo;
versionInfo.dwOSVersionInfoSize = sizeof(versionInfo);
RtlGetVersion(&versionInfo);
// VSync control is NOT planned to be enabled on Win10 builds
// before RS1. Enabling it on DOD driver causes OS to stop the driver
// with error 43 when the system turns off display due to idle setting.
// On Windows 8.1 (9200 and 9600) till now no problem observed
// (OS does not send VSync enable command)
// On Windows 10RS1 (14393) enabling VSync control activates
// watchdog policy and creates high sensitivity to long (> 2 sec)
// processing in PresentDisplayOnly callback (stop with error 43)
if (versionInfo.dwBuildNumber >= 14393 || versionInfo.dwBuildNumber <= 9600)
{
// we will uncomment the line below after we address all the problems
// related to enabled VSync control in Win10RS1
//g_bSupportVSync = TRUE;
}
DbgPrint(TRACE_LEVEL_WARNING, ("VSync support %sabled for %d.%d.%d\n",
g_bSupportVSync ? "en" : "dis",
versionInfo.dwMajorVersion, versionInfo.dwMinorVersion, versionInfo.dwBuildNumber));
// Initialize DDI function pointers and dxgkrnl
KMDDOD_INITIALIZATION_DATA InitialData = {0};
@ -67,6 +92,11 @@ DriverEntry(
InitialData.DxgkDdiStopDeviceAndReleasePostDisplayOwnership = DodStopDeviceAndReleasePostDisplayOwnership;
InitialData.DxgkDdiSystemDisplayEnable = DodSystemDisplayEnable;
InitialData.DxgkDdiSystemDisplayWrite = DodSystemDisplayWrite;
if (g_bSupportVSync)
{
InitialData.DxgkDdiControlInterrupt = DodControlInterrupt;
InitialData.DxgkDdiGetScanLine = DodGetScanLine;
}
NTSTATUS Status = DxgkInitializeDisplayOnlyDriver(pDriverObject, pRegistryPath, &InitialData);
if (!NT_SUCCESS(Status))
@ -559,6 +589,40 @@ DodQueryVidPnHWCapability(
return pQxl->QueryVidPnHWCapability(pVidPnHWCaps);
}
NTSTATUS
APIENTRY
DodControlInterrupt(
IN_CONST_HANDLE hAdapter,
IN_CONST_DXGK_INTERRUPT_TYPE InterruptType,
IN_BOOLEAN EnableInterrupt
)
{
PAGED_CODE();
QxlDod* pQxl = reinterpret_cast<QxlDod*>(hAdapter);
if (InterruptType == DXGK_INTERRUPT_DISPLAYONLY_VSYNC)
{
pQxl->EnableVsync(EnableInterrupt);
return STATUS_SUCCESS;
}
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
APIENTRY
DodGetScanLine(
IN_CONST_HANDLE hAdapter,
INOUT_PDXGKARG_GETSCANLINE pGetScanLine
)
{
PAGED_CODE();
// Currently we do not see any practical use case when this procedure is called
// IDirectDraw has an interface for querying scan line
// Leave it not implemented like remote desktop does
// until we recognize use case for more intelligent implementation
DbgPrint(TRACE_LEVEL_ERROR, ("<---> %s\n", __FUNCTION__));
return STATUS_NOT_IMPLEMENTED;
}
//END: Paged Code
#pragma code_seg(pop)

15
qxldod/driver.h
View File

@ -217,6 +217,21 @@ DodSystemDisplayWrite(
_In_ UINT PositionX,
_In_ UINT PositionY);
NTSTATUS
APIENTRY
DodControlInterrupt(
IN_CONST_HANDLE hAdapter,
IN_CONST_DXGK_INTERRUPT_TYPE InterruptType,
IN_BOOLEAN EnableInterrupt
);
NTSTATUS
APIENTRY
DodGetScanLine(
IN_CONST_HANDLE hAdapter,
INOUT_PDXGKARG_GETSCANLINE pGetScanLine
);
#if DBG
extern int nDebugLevel;