MIniport驱动将显示器的edid注册到Windows系统中
时间: 2024-03-27 16:40:39 浏览: 14
下面是一个示例代码,可以在Miniport驱动中使用DDC/CI协议读取显示器的EDID并将其注册到Windows系统中:
```c
#include <ntddk.h>
#include <ntddvdeo.h>
NTSTATUS RegisterEDID(PHW_DEVICE_EXTENSION hwDeviceExtension)
{
NTSTATUS status = STATUS_SUCCESS;
VIDEO_REQUEST_PACKET vrp;
UCHAR ddcCommandBuffer[2] = { DDC_COMMAND_GET_VCP_FEATURE, DDC_FEATURE_EDID };
UCHAR ddcResponseBuffer[128];
ULONG ddcResponseSize;
RtlZeroMemory(&vrp, sizeof(VIDEO_REQUEST_PACKET));
vrp.IoControlCode = IOCTL_VIDEO_QUERY_AVAIL_MODES;
vrp.StatusBlock.Information = 0;
status = VideoPortZeroMemory(ddcResponseBuffer, sizeof(ddcResponseBuffer));
if (!NT_SUCCESS(status)) {
return status;
}
status = VideoPortGetVpStatus(hwDeviceExtension->HwDeviceExtension, &vrp);
if (!NT_SUCCESS(status) || vrp.StatusBlock.Information == 0) {
return status;
}
RtlZeroMemory(&vrp, sizeof(VIDEO_REQUEST_PACKET));
vrp.IoControlCode = IOCTL_VIDEO_QUERY_CURRENT_MODE;
vrp.StatusBlock.Information = 0;
status = VideoPortZeroMemory(ddcResponseBuffer, sizeof(ddcResponseBuffer));
if (!NT_SUCCESS(status)) {
return status;
}
status = VideoPortGetVpStatus(hwDeviceExtension->HwDeviceExtension, &vrp);
if (!NT_SUCCESS(status) || vrp.StatusBlock.Information == 0) {
return status;
}
RtlZeroMemory(&vrp, sizeof(VIDEO_REQUEST_PACKET));
vrp.IoControlCode = IOCTL_VIDEO_QUERY_DEVICE_INFO;
vrp.InputBuffer = ddcCommandBuffer;
vrp.InputBufferLength = sizeof(ddcCommandBuffer);
vrp.OutputBuffer = ddcResponseBuffer;
vrp.OutputBufferLength = sizeof(ddcResponseBuffer);
status = VideoPortGetVpStatus(hwDeviceExtension->HwDeviceExtension, &vrp);
if (!NT_SUCCESS(status)) {
return status;
}
ddcResponseSize = vrp.StatusBlock.Information;
// Parse the EDID from the DDC response buffer
// ...
// Register the EDID with the Windows system
UNICODE_STRING interfaceName;
RtlInitUnicodeString(&interfaceName, L"ACME\\MyMonitorEDID");
status = IoRegisterDeviceInterface(hwDeviceExtension->PhysicalDeviceObject, &GUID_DEVINTERFACE_MONITOR, NULL, &interfaceName);
if (!NT_SUCCESS(status)) {
return status;
}
PVOID edidBuffer = ExAllocatePoolWithTag(NonPagedPool, ddcResponseSize, 'edid');
if (edidBuffer == NULL) {
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(edidBuffer, ddcResponseBuffer, ddcResponseSize);
status = IoSetDeviceInterfacePropertyData(&interfaceName, &DEVPKEY_MONITOR_EDID, LOCALE_NEUTRAL, 0, DEVPROP_TYPE_BINARY, ddcResponseSize, edidBuffer);
if (!NT_SUCCESS(status)) {
ExFreePoolWithTag(edidBuffer, 'edid');
return status;
}
ExFreePoolWithTag(edidBuffer, 'edid');
return status;
}
```
请注意,这只是一个示例代码,具体实现可能因不同的硬件和驱动程序而有所不同。