I have a factory prototype machine that uses the S905X4 - K processor. It has a very special feature. In the projector’s SDR mode, it can also output the Dolby Vision EL layer, and the “woman” can be seen. By checking the dmesg information, it is found that, unlike common set - top boxes, the U - Boot of this machine has Dolby Vision enabled.
Why? Minix U8K have same “feature”. It boots with DV enabled.
You can disable it in Android or manual in CE by:
Minix-U8K:~ # fw_setenv dolby_status 0
Minix-U8K:~ # fw_setenv dolby_vision_on 0
There’s a DV uboot driver. All the DV capable SOCs I’ve seen are able to output the bootup splash screen in DV (g12b, sc2, t7, s5).
Are you sending a DV FEL signal from CE-NG to the projector, and the projector is displaying it in SDR?