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[idd] apply resolution after the final replug

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Preserve the requested display mode across intermediate swap chains when
rapid resolution changes cause replugs to be coalesced. Apply and clear
the mode only once the final replacement swap chain is ready.
This commit is contained in:
Geoffrey McRae
2026-07-18 04:36:42 +10:00
parent 791da3387a
commit 87db473122
3 changed files with 14 additions and 15 deletions
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27
idd/LGIdd/CIndirectDeviceContext.cpp
View File

@@ -412,18 +412,6 @@ void CIndirectDeviceContext::OnMonitorDestroyed(IDDCX_MONITOR monitor)
ReleaseSRWLockExclusive(&m_stateLock);
}
void CIndirectDeviceContext::OnAssignSwapChain()
{
AcquireSRWLockExclusive(&m_stateLock);
bool doSetMode = m_doSetMode;
CSettings::DisplayMode mode = m_setMode;
m_doSetMode = false;
ReleaseSRWLockExclusive(&m_stateLock);
if (doSetMode)
g_pipe.SetDisplayMode(mode.width, mode.height, mode.refresh);
}
void CIndirectDeviceContext::OnSwapChainAssigned()
{
AcquireSRWLockExclusive(&m_stateLock);
@@ -452,7 +440,9 @@ void CIndirectDeviceContext::OnSwapChainReleased()
void CIndirectDeviceContext::OnSwapChainReady()
{
bool replug = false;
bool replug = false;
bool doSetMode = false;
CSettings::DisplayMode mode = {};
AcquireSRWLockExclusive(&m_stateLock);
m_swapChainReady = true;
@@ -471,6 +461,15 @@ void CIndirectDeviceContext::OnSwapChainReady()
m_replugPending = false;
replug = true;
}
// Do not consume the requested mode on an intermediate replacement swap
// chain. The last coalesced replug must be the one that applies it.
if (!replug && m_doSetMode)
{
mode = m_setMode;
m_doSetMode = false;
doSetMode = true;
}
ReleaseSRWLockExclusive(&m_stateLock);
// Do not expose the context to pipe reload requests until the initial swap
@@ -479,6 +478,8 @@ void CIndirectDeviceContext::OnSwapChainReady()
if (replug)
InterlockedExchange(&m_replugQueued, 1);
else if (doSetMode)
g_pipe.SetDisplayMode(mode.width, mode.height, mode.refresh);
}
static inline void FillSignalInfo(DISPLAYCONFIG_VIDEO_SIGNAL_INFO & mode, DWORD width, DWORD height, DWORD vsync, bool monitorMode)

1
idd/LGIdd/CIndirectDeviceContext.h
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@@ -187,7 +187,6 @@ public:
void ReplugMonitor();
void OnMonitorDestroyed(IDDCX_MONITOR monitor);
void OnAssignSwapChain();
void OnSwapChainAssigned();
void OnSwapChainReleased();
void OnSwapChainReady();

1
idd/LGIdd/Device.cpp
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@@ -192,7 +192,6 @@ NTSTATUS LGIddMonitorAssignSwapChain(IDDCX_MONITOR monitor, const IDARG_IN_SETSW
auto * wrapper = WdfObjectGet_CIndirectMonitorContextWrapper(monitor);
wrapper->context->AssignSwapChain(
inArgs->hSwapChain, inArgs->RenderAdapterLuid, inArgs->hNextSurfaceAvailable);
wrapper->context->GetDeviceContext()->OnAssignSwapChain();
return STATUS_SUCCESS;
}