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DS90UB948-Q1: About 947,948 chip, there is a problem with the output screen, ask questions

Part Number: DS90UB948-Q1

Hello TI team:
     Our company has a car factory project that uses 947 and 948 chips.
     Dual ldvs output to 947, 948 dual ldvs output to 1920x720 screen;
     The problems that arise now are:
    1, 948 output self-test color bar screen, the color displayed is wrong;
    2, through the 947 output self-test color bar screen, the color is not correct;
    3, directly push the lvds screen of the cpu, the display is also the color is wrong and abnormal;
    It is now suspected that there is a problem with the hardware or software configuration on the 948 side;

However, the use of two other chips on our products is normal, using 949 and 948;
HDMI output to 949, 948 output to 1920x1080 screen;
This display is normal, no problem;
The two 948 parts of the circuit are used consistently

Ask TI's team, the self-test screen output color has a problem, what is the general place?
Is there a problem with the hardware or a problem with the software configuration?