HDMI output DCU720p configuration is invalid?

[435761040]

I changed the output timing of HDMI to 720P.

    s32v234_sdk\platform\s32_v234\config.h

    #define HDMI_RES_1280X720

But the display is still 1080p.
Is there a definition elsewhere? Or my changes have not taken effect? Need to change in the device tree?