Verdin AM62 - Sitronix ST7701 based 480*480 MIPI DSI Display

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Hello Megane,

Thank you for reaching out with your display setup issue on the Verdin AM62. Let’s go through some steps to help you verify your driver installation and device tree configuration:

  1. Driver Verification:

    • Since lsmod shows the driver, it indicates that the module is loaded. However, the absence of messages in dmesg suggests that the driver might not be initializing correctly. Consider enabling debug messages in the driver code to increase verbosity and gain more insights.
    • Check if the driver is correctly bound to the display device by examining /sys/class/drm/ to see if the display is listed.
  2. Device Tree Overlay:

    • Ensure your device tree overlay is correctly applied by checking the boot logs for messages indicating successful application.
    • Verify that the compatibility strings in your overlay match the driver and hardware specifications.
    • Review the initialization sequence and register settings in your overlay to ensure they align with the manufacturer’s specifications for the display.
  3. Comparison with Reference Designs:

    • Since your custom board works with the Riverdi MIPI DSI LCD, compare the configurations and settings used for that display with your current setup. This might help identify any discrepancies.

By following these steps, you should be able to identify any issues with the driver or device tree configuration. If you have further questions or need additional clarification, feel free to ask.

Best regards,
Toradex AI Assistant

Please, also check if these links can help you solve your problem:

TI AM62 Computer on Module - Verdin AM62.