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SN65DSI86: Interface forum

Edgar Lin2
Prodigy 210 points
Part Number: SN65DSI86
Other Parts Discussed in Thread: TEST2

Dear Ti Team

I am using SN65DSI86 as a brdige to transfer MIPI to eDP.

Please help to review the schmeatic as attached.unifi_panel 13_LCM circuit.pdf

Now, we have a promblem is SN65DSI86 can not read the EDID via AUX channel.

Could you help to guide us to solve this issue.

Thanks,

Edgar

  • 0
    TI__Guru**** 178126 points

    Edgar

    On the schematic

    Looking at the schematic, please have the option of having the pull-up on the TEST2 pin. 

    Does the panel require 100k pullup/pulldown on AUXp/n?

    On the EDID read issue

    Are you able to correctly read the DSI86 Dev ID and Rev ID (Register 0x00 to 0x08). I want to make sure the DSI86 I2C interface is working correctly.

    If you are able to read the Dev ID and Rev ID correctly, please use this sequence to read the EDID. 

    This script will read 256 bytes of the EDID.


    <aardvark>
    <configure i2c="1" spi="1" gpio="0" tpower="1" pullups="0" />
    <i2c_bitrate khz="100" />
    ======Enable I2C_ADDR_CLAIM1======
    <i2c_write addr="0x2D" count="1" radix="16">60 A1</i2c_write> />
    ======Write EDID base of 00 ======
    <i2c_write addr="0x50" count="0" radix="16">00</i2c_write> />
    ======Read 256 bytes of EEID======
    <i2c_read addr="0x50" count="256" radix="16">00</i2c_read> />
    </aardvark>

    Thanks

    David