Quick questions about changing channel width

[Zeng Yunze]

Hi,

I am planning to implement some channel width adaptation algorithms
using 802.11ac. But I have the following questions:

1, Can ath10k support dynamic channel width changing? ( Is the related
hardware available in the market? )

2, If we make some modification on the driver, can it support?

3, Does the STA need to reconnect or re-associate with the AP when the
channel width is changed?

4, What is the delay approximately by switching between different
channel widths?

I really appreciate it if someone knows the answers and can reply me.

Thanks,
Yunze