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DS90UB941AS-Q1: How to test the 941's port1 LCD when we have only one LCD at present

Part Number: DS90UB941AS-Q1

Test situation:

1.   941  port1->  948 ;

2.   set split mode;

0x1e, 0x01,
0x4f, 0x8c,
0x5b, 0x07,
0x56, 0x80,
0x32, 0x80,
0x33, 0x07,
           
0x36, 0x00,
0x37, 0x80,
0x38, 0x7f,
0x39, 0x07,
0x3a, 0x00,
0x3b, 0x00,
0x3c, 0xcf,
0x3d, 0x02,
0x1e, 0x02,
0x36, 0x00,
0x37, 0x80,
0x38, 0x7f,
0x39, 0x07,
0x3a, 0x00,
0x3b, 0x00,
0x3c, 0xcf,
0x3d, 0x02,
0x40, 0x04,
0x41, 0x05,
0x42, 0x1e,

3.   source 2*1920*720;

It doesn't work. My question are:

1. Could it work when only connect one 948 in split mode?

2. How to test port1 or port0 by pattern when in split mode?

Thanks.