[PATCH 2/2] mt76: connac: add support maximum regulatory Tx power
From: <sean.wang@mediatek.com>
Date: 2021-07-27 22:59:33
Also in:
linux-wireless
Subsystem:
mediatek mt76 wireless lan driver, the rest · Maintainers:
Felix Fietkau, Lorenzo Bianconi, Ryder Lee, Linus Torvalds
From: YN Chen <redacted> 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: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: YN Chen <redacted> --- .../wireless/mediatek/mt76/mt76_connac_mcu.c | 43 ++++++++++++++++++- 1 file changed, 41 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
index d71393b1c5e6..84f42ce12626 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c@@ -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 (power > 127 || power < -127) + power = 127; + 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; + reg_power = mt76_connac_get_ch_power(phy, &chan, + tx_power); sar_power = mt76_connac_get_sar_power(phy, &chan, - tx_power); + reg_power); mt76_get_rate_power_limits(phy, &chan, &limits, sar_power);
--
2.25.1
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