On Fri, 2021-02-12 at 14:58 +0900, Nitin Joshi wrote: > Some newer Thinkpads have the WLAN antenna placed close to the WWAN > antenna. In these cases FCC certification requires that when WWAN is > active we reduce WLAN transmission power. A new Dynamic Power > Reduction Control (DPRC) method is available from the BIOS on these > platforms to reduce or restore WLAN Tx power. > > This patch provides a sysfs interface that userspace can use to adjust the > WLAN power appropriately. Question from a user: How does wlan_tx_strength_reduce relate to or interact with ioctl(SIOCSIWTXPOW) (i.e. iwconfig txpower) and NL80211_ATTR_WIPHY_TX_POWER_LEVEL (i.e. iw dev set txpower)? If I request 30 dBm then enable wlan_tx_strength_reduce, what happens? Same in the opposite order? Will ioctl(SIOCGIWTXPOW) show the reduced txpower? Thanks, Kevin
