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DS90UB954-Q1: CSI-2 TX speed and lane count

Part Number: DS90UB954-Q1

Our product is planed to through 1860x1860/p30 YUV422 8bit (1.66Gbps) data x1 by 953/954.

And, CSI-2 RX device has limitation that total data rate up to 2.4Gbps.

In this case, CSI_TX_SPEED = 800Mbps x4lanes > over spec of RX device, 400Mbps x4lanes > Insufficient bandwidth.

My questions is below.

1. Is it possible to adjust the CSI_TX_SPEED 450~600Mbps?

2. Is the solution of 800Mbps x3lanes common idea?