2023-03-09 06:20:25 +01:00
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Read and Write EDID
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===================
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Read and write EDID data over an I2C bus.
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Usage
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-----
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Load the Linux kernel module:
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modprobe i2c-dev
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Adapt the I2C bus device `/dev/i2c-4` in the examples below
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to whatever matches your hardware setup.
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**Note:** Be very careful to write to the correct bus!
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Failing to do so may seriously damage your hardware!
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To read an EDID, run (as root):
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./edidread -d /dev/i2c-4 > edid.bin
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To write an EDID, run (as root):
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./edidwrite -d /dev/i2c-4 < edid.bin
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**Note:** The `edidread` tool writes binary data to stdout which
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is potentially dangerous. Redirect the output into a file or pipe.
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2023-07-31 18:44:35 +02:00
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For further usage information, run the comands with `--help`.
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Notes
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-----
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Validate the EDID binary blob with the `edid-decode` tool:
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edid-decode -c < edid.bin
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Links
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-----
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* https://git.linuxtv.org/edid-decode.git/about/
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