IOAVService_Private.h

#pragma once
@import Darwin;
@import Foundation;
typedef mach_port_t io_object_t;
typedef io_object_t io_service_t;
typedef CFTypeRef IOAVServiceRef;
typedef CFTypeRef IOAVDeviceRef;
typedef kern_return_t IOReturn;
// allocator: must be kCFAllocatorDefault
// Note that this defaults to grabbing the external IOAVService:
// iOS 12.4:
// {
//     IOProviderClass = IOAVService;
//     Location = External;
// }
// iOS 14.1:
// {
//    IOPropertyMatch =     {
//        IOAVServiceUserInterfaceSupported = 1;
//    };
//    Location = External;
// }
extern IOAVServiceRef IOAVServiceCreate(CFAllocatorRef allocator);
extern IOAVServiceRef IOAVServiceCreateWithService(CFAllocatorRef allocator, io_service_t service);
#define IOAVLocationExternal 0
#define IOAVLocationEmbedded 1
extern IOAVServiceRef IOAVServiceCreateWithLocation(CFAllocatorRef allocator, uint32_t location);

#define IOAVServiceI2CArg4Max (1 << 12)

// w4 must be less than (1 << 12) or it returns kIOReturnBadArgument
extern IOReturn IOAVServiceReadI2C(IOAVServiceRef service, uint32_t w1, uint32_t w2, void* w3,
                                   uint32_t w4);
extern IOReturn IOAVServiceWriteI2C(IOAVServiceRef service, uint32_t w1, uint32_t w2, void* w3,
                                    uint32_t w4);

extern IOReturn IOAVServiceSetVirtualEDIDMode(IOAVServiceRef service, void* x1_possibly_unused,
                                              CFDataRef x2);
extern IOReturn IOAVServiceCopyEDID(IOAVServiceRef service, CFDataRef* x1);

// not sure what a device does that a service can't??
extern IOAVDeviceRef IOAVServiceGetDevice(IOAVServiceRef service);

extern IOAVDeviceRef IOAVDeviceCreateWithService(CFAllocatorRef allocator, io_service_t service);