default or selected kernelversion does not have config value CONFIG_OMAP2_DSS_FAKE_VSYNC.
Result is shown for kernelversion 6.2.5

Fake VSYNC irq from manual update displays


Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>OMAP2+ Display Subsystem support (EXPERIMENTAL)
└─>Fake VSYNC irq from manual update displays
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
If this is selected, DSI will generate a fake DISPC VSYNC interrupt
when DSI has sent a frame. This is only needed with DSI or RFBI
displays using manual mode, and you want VSYNC to, for example,
time animation.