TDA4VM: UB960 CSI and multi YUV cameras issue

Our camera stream is  OVX3C--->Gw5200(ISP)---->UB935(SER)------>UB960----->TDA4 CSI 

During Debuging ,I have some problems :

1. When I set  one camera work , the camera is working  successful,and the dispaly has image.But I try  two cameras with UB960 , the dispaly is nothing,and the  vx_app_multi_cam  is hanged .

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Demo : Camera Demo
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s: Save CSIx, VISS and LDC outputs

p: Print performance statistics

x: Exit

Enter Choice: x

2. In the camera config with one ,I set the Ub960 CSI  speed 1600 {0x1F,0x00,}

and the TDA4VM CSI 1600{captureObj->params.instCfg[id].laneBandSpeed         = TIVX_CAPTURE_LANE_BAND_SPEED_1500_TO_1750_MBPS; },

they will be not working ，and the  vx_app_multi_cam  is also hanged .

Here is my config for ub960：

One camera config：

{0x4C,0x01, 0x10},   //for port 0

{0x58,0x5D, 0x10},

Two cameras config：