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YCbCr 4:2:0 over HDMI

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Phil Hamilton's picture
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Phil Hamilton

Aug 11, 2016 - 02:01am

  • Hi,

     

    I have been trying to figure out how I can output YCbCr 4:2:0 over HDMI instead of RGB with Intel graphics?

     
    I have a Sony TV, which supports 3840x2160p 60hz, but the TV will only accept YCbCr at that resolution, but Intel Linux Driver only outputs at RGB. So the TV displays "Unsupported signal, Check your device output".
     
    Just to answer the typical questions: I have a UHD TV with HDMI 2.0 ports, HDMI 2.0 cable (tried multiple) and an Intel NUC6i7KYK (Skull Canyon). The HDMI cable is plugged into the HDMI 2.0 port on the NUC then straight into the TV (no AVR).
    I can confirm this works as Running Windows 10 allows 3840x2160p at 60hz without issue (because Intel Graphics Control Panel supports YCbCr)
     
    I have tried Ubuntu 16.04 (with all available updates) and the latest 16.10 daily build.
    I installed LibreELEC Milhouse nightly which is using Linux Kernel 4.7.0 (I wanted to try a newer kernel... still not resolved).
     
    The TV supports RGB at 1080p and 2160p 30hz, but not at 2160p 60hz.
    The TV specs shows (YCbCr4:2:0 8bit) for 2160p 60hz. But from what I can't seem to figure out is why I can't get 2160p at 30hz, when that should accept RGB?
     
    My main goal is to get 3840x2160 at 60hz
     
    Does anyone know if this is possible already or is there something I can install or patch to accomplish this?

     

    Thanks.

    Aug 11, 2016 - 02:01am