hi, I’m working on porting lt6911uxc to jetson nano. I previously successfully ported with tc358743.
So, I proceeded with the work by referring to tc358743, but porting to lt6911uxc failed.
I compared the two drivers, and lt6911uxc did not have a function to set EDID.
When porting the tc358743 driver, the EDID was set through I2C to stream the laptop’s monitor screen.
Why is there no EDID setting function in the lt6911uxc driver?
Please contact with the vendor. lt6911uxc is not our product.
I will add that when EDID is queried from a monitor, that it is the HDMI or DisplayPort itself which provides the power for the i2c circuitry in the monitor (thus it works even when the monitor’s power is turned off). Even if the chip is correctly set up, if you don’t have power to the DDC wire (probably a hot plug detect), then it will still fail. The power to the DDC wire and the hot plug detect might require changes to device tree. You should monitor with an oscilloscope and see if the hot plug detect and power for DDC exist.
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