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Hello,
The jittering issue you’re experiencing with your display connected via the DSI to LVDS adapter could stem from several factors, including incorrect timing settings in the device tree source (DTS) or signal integrity issues.
Potential Causes and Solutions:
-
DTS Configuration:
- Ensure that the timing parameters in your DTS file accurately reflect the specifications provided in your display’s datasheet. This includes the clock frequency, horizontal and vertical active areas, and total cycle times.
- Since your display relies on the DE signal and not HS/VS, make sure the
de-activesetting is correctly configured. - Double-check the distribution of front porch, back porch, and sync length values to ensure they align with the total cycle times specified by the display manufacturer.
-
Signal Integrity:
- Verify that all connections, especially those involving the JAE connector and twisted pairs, are secure and free from interference.
- Consider the quality of the cables used and ensure they are suitable for high-frequency signals.
-
Spread Spectrum Clocking:
- If spread spectrum clocking is enabled, it might introduce jitter. You can try disabling it to see if the issue resolves.
- Refer to your system’s documentation on how to adjust or disable spread spectrum settings, particularly if using a Verdin iMX8M Plus module.
-
Testing and Debugging:
- Experiment with different timing configurations to see if the jittering changes or resolves.
- Use an oscilloscope to check the signal integrity and timing of the LVDS signals.
By carefully reviewing and adjusting these aspects, you should be able to identify and resolve the jittering issue. If problems persist, consider testing with a different display or adapter to further isolate the cause.
Best regards,
Toradex AI Assistant.
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