Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Alif Semiconductor/AE512F80F5582LS_CM55_HP_View/DSI/DSI_MODE_CFG#0x0
CMD_VIDEO_MODE=Val_0x0
Mode Configuration Register
This bit configures the operation mode:
0 (Val_0x0): Video mode
1 (Val_0x1): Command mode. Not supported by the DSI controller in this device.
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https://github.com/cmsis-svd/cmsis-svd-data