Using custom HDMI display timings in UEFI

Hello,

I am trying to use an HDMI display with an inaccurate EDID. On X.org, I can use driver options to ignore the EDID and add a custom mode to the monitor section with a specific clock and timings.

Is there a way to do this in UEFI as well, though? Perhaps through a device tree property? This is important for the UEFI menu as well as boot menus and anything that uses GOP later on.

There is no official support for this but we have experimental patch here

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