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DS90UB941AS-Q1: Pattern generator test with DS90UB948 not working

Part Number: DS90UB941AS-Q1

Hi,

we have a custom board with a DS90UB941 connected by dual FPD (STP) with a 948 EVM with an attached FHD LCD panel. In the first step we want to run the pattern generator with internal timings on the 941.

Using the Analog LaunchPAD tool we can connect to the 941 and configure the pattern generator with internal timing source and enable it. But we don't get a lock on the 948 side.

Pattern Generator is configured this way:

The Control/Status tab looks like this:

Shouldn't FPD3-Status/Link Active be "True" when the pattern generator is running?  Furthermore the pixel clock on the information tab is 33MHz for both 941 and 948:

On 941 we have MODE_SEL0 = 3 (no splitter, 4 DSI lanes) and MODE_SEL1 = 1. On the 948 EVM, the dip switches configure MODE_SEL0 = 1, MODE_SEL1 = 1, BISTEN = L.

Any help is appreciated!

Joerg