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Official Display • Re: Driver of display revision 4

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I did further testing with the old revision and it also shows the address 0x50 in i2cdetect, however, it is address 0x45. When I do i2cget of the slave 0x45 of register id 0x80, I retrieve the expected 0x3c.(https://github.com/raspberrypi/linux/bl ... een.c#L421)
dmesg_timeout.png
However, in the new revision, it also shows the 0x50 in i2cdetect, but it timeouts when trying to read REG_ID.
i2cdetect_newrevision.png
And the driver probe also timeouts:
i2cget_old.png
I'm using the latest raspberry pi touchscreen driver (https://github.com/raspberrypi/linux/bl ... chscreen.c), but it only works with the old revision of the panel.

I tried with the raspberry pi and everything worked just fine. What am I missing?

Best regards,
Marcelo Borges

Statistics: Posted by jmarcelomb — Fri Apr 12, 2024 3:52 pm



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