One conclusive way, is how the display drivers do when fed the property for refresh rate, if they themselves do something like
To make sure you don't say any illogical argument again. I took extra initiative to search exactly what some kernel developers wrote in telegram group. Here are some of the exact words from different kernel developers:I don't know where you came up with such nonsense that a display that supports 60hz and 120hz refresh rate does not support 90hz. Yes logically supports 90hz! And why isn't it included directly in the rom like a 90hz switch? Because a device that has a 120hz refresh rate sells better than a device that has a 90hz refresh rate. logical.
yeah, you can but doesn't help with battery life. So in the end, it is matter of is doing this worth it or not. If you like 90hz more than 120hz, then of course you are free to use that