I use CYW43455 as AP in Japan, but DFS features of W53 and W56 are not working.
The DFS related parameters of hostapd.conf are as follows.
Probably I think that NVRAM_FILE (brcmfmac43455-sdio.txt) also has parameters related to DFS, but I can not find it.
The present condition is changing only the following parameters.
How do I change which parameters to enable the DFS feature?