PDX_ENABLEIRQ callback function (dxmini.h)
The DxEnableIRQ callback function indicates to the video miniport driver which IRQs should be enabled or disabled.
Syntax
PDX_ENABLEIRQ PdxEnableirq;
DWORD PdxEnableirq(
PVOID unnamedParam1,
PDDENABLEIRQINFO unnamedParam2,
PVOID unnamedParam3
)
{...}
Parameters
unnamedParam1
Points to the miniport driver's device extension.
unnamedParam2
Points to the DDENABLEIRQINFO structure that contains the information required to enable interrupts.
unnamedParam3
Reserved for system use.
Return value
DxEnableIRQ returns DX_OK if it succeeds; otherwise, it returns one of the following error values:
Remarks
The dwIRQSources member of the DDENABLEIRQINFO structure at EnableIrqInfo contains the DDIRQ_Xxx flags that are set for every IRQ that should be enabled. If an IRQ is not specified in this call, it should be disabled. If the requested combination cannot be supported, this function fails.
Because the video miniport driver must always manage its own IRQ, it must call the specified IRQCallback when an IRQ occurs. When calling IRQCallback, the dwIRQFlags member of the DX_IRQDATA structure passed to IRQCallback contains the DDIRQ_Xxx flags that indicate what caused the IRQ.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | dxmini.h (include Dxmini.h) |