MIPI-DSI Troubleshooting

If you're having trouble with your LattePanda, here's the place to get help.
Forum rules
    Post technical issues here.

    - Discussion tone should be kept polite and focused on facts
    - Vulgar language or flaming constitutes an instant ban
    - Please note we cannot support PM requests for help
    - Members are asked to post in English only so that posts can be well received and properly monitored
    - You can find the RMA guide [here]
    - Please check if your question has already been answered before opening a new thread. If it has not, please verify the following:

    - Have you tried a hard reset?
    - Are you using a 5V@2A+ power supply and a high quality USB cable?
    - Have you tried powering the board through the CN2 headers?
    - Have you tried a cooling solution such as a fan or heatsink?
    - Have you tried reinstalling drivers?
    - Have you tried reloading the operating system?
    - Have you tried flashing the BIOS?
    - Are you able to flash the BIOS at the hardware level?

    If you have not found a solution, post a new issue. To speed up the process please let us know:
    - Have you tried the solutions listed above?
    - What board are you using? Standard (2GB RAM/32GB eMMC) or Enhanced (4GB RAM/64GB eMMC)?
    - Have you tried any other solutions?
    - How long have you had your board for?
    - When did you first boot your board?
    - Did it work ok before the issue occurred or has the issue always been there?
    - Use images and videos to help us understand the issue where possible

    If you are seeking RMA:
    - Please open a new topic rather than hijacking someone else's thread
    - Mark RMA posts with [DEFECTIVE] + <helpful description of issue>. We can then approve/disapprove each request
    - Completed RMA cases will be marked with [CLOSED]
    You can find the RMA guide [here]

    Resolved Issues
    - If you manage to fix an issue, please share your solution for the good of the community. It could help someone else in future.
    - If an issue is resolved the thread should be marked as [RESOLVED]. We can then sticky the thread to help people in future.

    What does troubleshooting support?
    - Hardware queries
    - Hardware issues that weren’t caused by you, e.g DOA board
    - Windows 10 specific issues
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    User avatar
    Posts: 1
    Joined: Mon Jan 14, 2019 2:59 pm

    Mon Jan 14, 2019 4:11 pm

    I am trying to get a MIPI-DSI display to work with the regular LattePanda 2G/32G. Both are 4-lane MIPI-DSI and I've made a PCB to map the D0, D1, D2, D3, and CLK lines from board to display. The main test configuration is the LP plugged into a HDMI display as well as the MIPI-DSI display and it is powered by a 5V/3A USB power supply. When I turn on the LP, I see the bios post to the HDMI display and, shortly after, the backlight turns on on the MIPI display. Once Windows boots, the HDMI display matches the resolution and orientation of the MIPI display without any configuration, which seems to suggest that the display driver chip In order to get this far, however, I had to go into BIOS and change multiple settings.

    The display uses an ILI9881C driver chip and, as far as I know, it should be interrogated on powerup and the correct display settings negotiated with the LP.

    Can someone please help me figure out what I am doing wrong? Thank you.

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