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Part Number: AM5718
We have designed our custom board in which we have used the AM5718 Processor. During the testing we found "omapdss error: HDMI I2C timeout reading EDID" error.
Please check the below image of HDMI connection of our board. we have doubts on hardware so can check and guide us if any hardware issue?
Thanks & Best Regards;
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In reply to Biser Gatchev-XID:
In reply to Nikunj Patel:
Hi Biser. Do you have a display connected on the HDMI? Ans:Yes Have you checked the signal levels on the HDMICONN_I2C signals?Ans: There was no any signal on both pins [we measured at R795 and R796] Thanks
Thanks & Best Regards,
We have checked the "HDMI_DDC_SCL" pin at R795 resistor. When we plug the HDMI Cable to the board this signal goes to low. as per attched images.
1) When HDMI Cable Plugged
2) When HDMI Cable UnPlugged
The SCL pin should not go low and stay low. This is invalid for I2C to function. There must be a design or assembly issue causing this condition. How many boards have you assembled? Do they all behave the same? Do you have a different HDMI display that you can plug in to see if the behavior is different? Another test would be to use an AM571x IDK with the HDMI panel and to probe the signals to see what is different.
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