TDA4VMXEVM: Pixel Clock variable in dss display test source code

Part Number: TDA4VMXEVM

Dear colleagues,

I come back to you again to ask about Pixel Clock in dss_display_test code. As I am using J721E EVM, it has an integrated UB941 Serializer.

I can change the pixel clock of UB941 using different Clock Modes but still don't understand what the variables below are used for:

The first one is lcdOpTimingCfg.mInfo.pixelClock located in dss_display_test.c

The other is located in ../utils/app_utils_j721e.c 

Why my application works only when this variables are set to 74250000 ?

If I set this variable to 74250000 and select a pixel clock in UB941 lower than 74.25 MHz, my application still work but if i set the pixel clock to more than 74.25 MHz it's not working.

Best regards,

Brahim