Compiler/DS90UB954-Q1: Line-Concatenate Forwarding

Tool/software: TI C/C++ Compiler

  Our product use 954 to receive images from two 913(720p),  i use the  Line-Concatenate mode;  but I can only see the images from RIN1 

Architecture used as belows:

T         T  --------------RIN0-----------------913-------(720P@30fps yuv422)

 |  954 |

 |_     _| -----------------RIN1-----------------913------(720P@30fps yuv422)

here is my Settings

struct fpdlink_reg_struct TI954_reg_list[] = {
    //{0xB3, 0x00},
    
    {0x0c , 0x33},// enable receiver port 
    /*********/
    {0x4C, 0x01},//rin_0 913a aliasing
	//{0x72, 0xE8},//vc0 to csi-tx VC0
    {0x58, 0x58},
    //{0x5B, (TI913_ADDR << 1)},//??
    {0x5C, (TI913_ADDR_0<<1)},
    {0x5D, ISP_ADDR<<1},
    {0x65, ISP_ADDR<<1},
	  {0x6D, 0x7c},
	
    {0x70, 0x1E},//set RX0 RAW10_VC=0
    {0x7C, 0xE0},
    ///********/
    {0x4C, 0x12},//rin_1 913a aliasing
    {0x70, 0x1E},//  sensor b VC0 to csi-tx vc1
    {0x58, 0x58},
    //{0x5B, (TI913_ADDR << 1)},//????
    {0x5C, (TI913_ADDR_1<<1)},
    {0x5D, ISP_ADDR<<1},
    {0x65, ISP_ADDR_1<<1},
    {0x6D, 0x7c},
   
	//{0x72, 0xE8},
    {0x7C, 0x01},// FV_PO 
    /******/
    {0x20, 0x00},// for all rx to csi0
    {0x21, 0x3c},// line concatenatuon 
    {0x33, 0x03}, //csi en  4lan 
    {0x35, 0x01},  
    {0x1F, 0x00},// 1.6Gbps
    //{0x0F, 0x7F}, //gpio out 
    //{0x6E, 0x10},
    //{0x6F, 0x32},	
};