DSI Host interrupt and status register 0 (DSI_ISR0)

[cr_qc]

Hello,

We are currently using a STM32U5G9 with MIPI Port 2 lanes talking to ST7701S TFT driver. We found on power up when we have a lot of error in DSI_ISR0.PE3 and DSI_ISR0.PE4 are set, display do not start. Definition of this error is : This bit indicates the LP1(0) contention error ErrContentionLP1(0) from lane 1(0). Not finding to much info on this... Any idea?

[KDJEM.1]

Hello @cr_qc;

I recommend you to look at RM0456 Table 447. Error causes and recovery may help you to solve the issue. This table  explains the reasons that set off these interrupts and also explains how to recover from these interrupts.

I hope the recommendations can help you to handle the error.

Thank you.

Kaouthar