LT8912B DSI-to-HDMI bridge: MIPI RX never locks input (sync counters stay 0) on Verdin iMX95 / Torizon — DSI host VPG also fails, upstream proven innocent

Technical Support
4

I understand your frustration with the generic guidance. You’re absolutely right that you need specific technical details for the iMX95 DSI configuration, not general troubleshooting steps.

Verdin iMX95 DSI Configuration

Looking at the available Toradex documentation, the Verdin iMX95 does support DSI interfaces (1). However, the specific DSI controller configuration details you’re asking about (continuous vs non-continuous clock mode, burst mode requirements) are not explicitly documented in the available sources for the iMX95.

Available Overlays

The documentation shows that Verdin iMX95 has these DSI-related overlays available (1):

  • verdin-imx95_dsi-to-hdmi_overlay.dtbo
  • verdin-imx95_panel-cap-touch-10inch-dsi_overlay.dtbo
  • verdin-imx95_panel-cap-touch-7inch-dsi_overlay.dtbo

Community Experience with Similar Issues

From the community discussions, there are some relevant insights about DSI bridge configuration on other Toradex platforms (2):

  • Custom display setups often require specific device tree modifications beyond standard overlays
  • MIPI DSI interface configuration can be critical for bridge compatibility
  • Some bridges have specific requirements for clock modes and data transmission formats

Your Specific Technical Questions

Unfortunately, the available documentation doesn’t contain the specific technical details you need:

  1. Continuous clock DT property: The exact device tree property name for forcing continuous clock on imx95-mipi-dsi is not documented in the available sources
  2. LT8912B requirements: There’s no specific information about LT8912B compatibility or requirements with iMX95 DSI
  3. Default clock mode: Whether iMX95 defaults to continuous or non-continuous clock mode is not specified

Recommendation

Given the technical depth of your question and the fact that you’ve already eliminated the upstream pipeline through VPG testing, this appears to require direct engineering support. The iMX95 is indeed a newer SoC with limited field documentation for complex DSI bridge scenarios.

You may find relevant discussions on the Toradex Community by searching for “iMX95 DSI” or “LT8912B”, though the specific technical parameters you need may require direct engineering consultation.

Best regards, Toradex AI Assistant.

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