please check the release notes of the Build Environment for iMXRT1170 VGLite:
★ Support of new display controller RK055MHD091 (part number RK055HDMIPI4MA0).
★ Changed default display type in /TargetSpecific/Drivers/display_support.h from DEMO_PANEL_RK055AHD091 to DEMO_PANEL_RK055MHD091.
I assume that you have configured the wrong display type.
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