Hello!
I am currently troubleshooting an issue on a customized board based on the STM32F469IIT6 MCU. The board leverages MIPI-DSI Video Burst Mode to render a TouchGFX UI on the display.
The problem manifests as follows: the display works perfectly normal when the video signal initializes, but the image intermittently shifts within 5 minutes after power-on.
I have captured the MIPI-DSI video signal using an oscilloscope for analysis. The results indicate that the synchronization signal of the DSI output remains stable as expected, while a noticeable delay occurs in the pixel data transmission — which is the direct cause of the image shifting issue.
I had confirmed that the registers of the DSI and LTDC wasn't changed before and after the shift. The DSI and LTDC shows no warnings or errors.
What could be the root cause of this? Is there any solutions?
You can find the shifted image displayed and the wave captured in the attachment.
