dryagin ,
For our device has not been done and hardly do. I could throw on a global 10.3.2, but is likely to mirum snaps.
If you need this feature, it is better to turn to this topic
Order table for fashion and jewelry for MIUI firmware. But there is one thing.
The maximum brightness at a call makes sense when this function can be turned on in time, since it is not needed at night and cause discomfort, so the firmware must be implemented "free" or "independent" settings, and those in mirum likely places without . So it is necessary to initially implement these settings, and then add the maximum brightness. If you decide to apply to the table of orders, in the cap threads have a template, please apply for it.