Shiji Yang <yangshiji66@xxxxxxxxxxx> wrote: > In the vendor driver, the current channel power is queried from > EEPROM_TXPOWER_BG1 and EEPROM_TXPOWER_BG2. And then the mixed value > will be written into the low half-word of the TX_ALC_CFG_0 register. > The high half-word of the TX_ALC_CFG_0 is a fixed value 0x2f2f. > > We can't get the accurate TX power. Based on my tests and the new > MediaTek mt76 driver source code, the real TX power is approximately > equal to channel_power + (max) rate_power. Usually max rate_power is > the gain of the OFDM 6M rate, which can be readed from the offset > EEPROM_TXPOWER_BYRATE +1. > > Based on these eeprom values, this patch adds basic TX power control > for the MT7620 and limits its maximum TX power. This can avoid the > link speed decrease caused by chip overheating. rt2800_config_alc() > function has also been renamed to rt2800_config_alc_rt6352() because > it's only used by RT6352 (MT7620). > > Notice: > It's still need some work to sync the max channel power to the user > interface. This part is missing from the rt2x00 driver framework. If > we set the power exceed the calibration value, it won't take effect. > > Signed-off-by: Shiji Yang <yangshiji66@xxxxxxxxxxx> > Acked-by: Stanislaw Gruszka <stf_xl@xxxxx> Patch applied to wireless-next.git, thanks. 821b5192c955 wifi: rt2x00: limit MT7620 TX power based on eeprom calibration -- https://patchwork.kernel.org/project/linux-wireless/patch/TYAP286MB03159090ED14044215E59FD6BC10A@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
