waydabber/applesiliconddc

DDC Library for Apple Silicon Macs

AppleSiliconDDC

DDC Library for Apple Silicon Macs

Usage

Upcoming...

For sample implementation take a look at the source code of MonitorControl (as Arm64DDC.swift in the project)

Please mention this repo publicly if used. :)

applesiliconddc's Issues

macMini m2 with HDMI

With my Dell U2715H, connected via HDMI on macMini m2 and i had to change ARM64_DDC_7BIT_ADDRESS to 0xB7.
There is a comment for 0x37 value "This works with DisplayPort devices".

I'm wondering maybe you point me a direction, how to check the connection type.

Here is the display information:

Arm64Service(displayID: 2, service: Optional(<IOAVService 0x600002a6c9f0 [0x1fecec8c0]>), serviceLocation: 1, discouraged: false, dummy: false, serviceDetails: dcc.AppleSiliconDDC.IOregService(edidUUID: "10AC67D0-0000-0000-021A-0103803C2278", manufacturerID: "DEL", productName: "DELL U2715H", serialNumber: 808735827, alphanumericSerialNumber: "GH85D61E04TS", location: "External", ioDisplayLocation: "IOService:/AppleARMPE/arm-io@10F00000/AppleT811xIO/disp0@30000000/AppleCLCD2", transportUpstream: "DP", transportDownstream: "HDMI", service: Optional(<IOAVService 0x600002a6c9f0 [0x1fecec8c0]>), serviceLocation: 1, displayAttributes: Optional({
    AspectRatio = 15;
    Chromaticity =     {
        Blue =         {
            X = 9792;
            Y = 3904;
        };
        Green =         {
            X = 19776;
            Y = 40192;
        };
        Red =         {
            X = 43328;
            Y = 21760;
        };
    };
    ContinuousFrequencySupport = None;
    DefaultColorSpaceIsSRGB = 1;
    DefaultWhitePoint =     {
        Gamma = 144179;
        X = 20544;
        Y = 21568;
    };
    HasHDMILegacyEDID = 1;
    MaxHorizontalImageSize = 60;
    MaxVerticalImageSize = 34;
    MaximumRefreshRate = 86;
    MaximumVariableRefreshRate = 5636096;
    MinimumRefreshRate = 56;
    MinimumVariableRefreshRate = 3670016;
    PortID = 80;
    PreciseAspectRatio = 115652;
    ProductAttributes =     {
        AlphanumericSerialNumber = GH85D61E04TS;
        LegacyManufacturerID = 4268;
        ManufacturerID = DEL;
        ProductID = 53351;
        ProductName = "DELL U2715H";
        SerialNumber = 808735827;
        WeekOfManufacture = 2;
        YearOfManufacture = 2016;
    };
    SupportsActiveOff = 1;
    SupportsStandby = 1;
    SupportsSuspend = 1;
    SupportsVariableRefreshRate = 0;
    WhitePoints =     (
                {
            Gamma = 144179;
            X = 20544;
            Y = 21568;
        }
    );
})), matchScore: 15)