Commit f3f1c045 authored by YN Chen's avatar YN Chen Committed by Felix Fietkau
Browse files

mt76: connac: add support for limiting to maximum regulatory Tx power 



Consider .max_reg_power in struct ieee80211_channel to limit the
maximum power the wireless device allowed to transmit on the
corresponding channel according to the regulatory domain.

Co-developed-by: default avatarSean Wang <sean.wang@mediatek.com>
Signed-off-by: default avatarSean Wang <sean.wang@mediatek.com>
Signed-off-by: default avatarYN Chen <YN.Chen@mediatek.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 781f6296

drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c

+41 −2
Original line number Diff line number Diff line
@@ -1773,6 +1773,43 @@ static s8 mt76_connac_get_sar_power(struct mt76_phy *phy, 
	return target_power;

}



static s8 mt76_connac_get_ch_power(struct mt76_phy *phy,

				   struct ieee80211_channel *chan,

				   s8 target_power)

{

	struct mt76_dev *dev = phy->dev;

	struct ieee80211_supported_band *sband;

	int i;



	switch (chan->band) {

	case NL80211_BAND_2GHZ:

		sband = &phy->sband_2g.sband;

		break;

	case NL80211_BAND_5GHZ:

		sband = &phy->sband_5g.sband;

		break;

	default:

		return target_power;

	}



	for (i = 0; i < sband->n_channels; i++) {

		struct ieee80211_channel *ch = &sband->channels[i];



		if (ch->hw_value == chan->hw_value) {

			if (!(ch->flags & IEEE80211_CHAN_DISABLED)) {

				int power = 2 * ch->max_reg_power;



				if (is_mt7663(dev) && (power > 63 || power < -64))

					power = 63;

				target_power = min_t(s8, power, target_power);

			}

			break;

		}

	}



	return target_power;

}



static int

mt76_connac_mcu_rate_txpower_band(struct mt76_phy *phy,

				  enum nl80211_band band)
@@ -1840,10 +1877,12 @@ mt76_connac_mcu_rate_txpower_band(struct mt76_phy *phy, 
				.hw_value = ch_list[idx],

				.band = band,

			};

			s8 sar_power;

			s8 reg_power, sar_power;



			sar_power = mt76_connac_get_sar_power(phy, &chan,

			reg_power = mt76_connac_get_ch_power(phy, &chan,

							     tx_power);

			sar_power = mt76_connac_get_sar_power(phy, &chan,

							      reg_power);



			mt76_get_rate_power_limits(phy, &chan, &limits,

						   sar_power);