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Subject[PATCH AUTOSEL 5.0 06/98] mt76: mt76x2: fix 2.4 GHz channel gain settings
Date
From: Felix Fietkau <nbd@nbd.name>

[ Upstream commit b8cfd87ac24273e36fbd3ecda631f3ba6566d493 ]

AGC register 35, 37 override for the low gain setting should only be done
on 5 GHz. Also, 2.4 GHz needs a different value for register 35

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
---
.../net/wireless/mediatek/mt76/mt76x2/phy.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c
index 11167b7af668..2f618536ef2a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c
@@ -285,6 +285,7 @@ void mt76x2_phy_update_channel_gain(struct mt76x02_dev *dev)
{
u8 *gain = dev->cal.agc_gain_init;
u8 low_gain_delta, gain_delta;
+ u32 agc_35, agc_37;
bool gain_change;
int low_gain;
u32 val;
@@ -321,6 +322,16 @@ void mt76x2_phy_update_channel_gain(struct mt76x02_dev *dev)
else
low_gain_delta = 14;

+ agc_37 = 0x2121262c;
+ if (dev->mt76.chandef.chan->band == NL80211_BAND_2GHZ)
+ agc_35 = 0x11111516;
+ else if (low_gain == 2)
+ agc_35 = agc_37 = 0x08080808;
+ else if (dev->mt76.chandef.width == NL80211_CHAN_WIDTH_80)
+ agc_35 = 0x10101014;
+ else
+ agc_35 = 0x11111116;
+
if (low_gain == 2) {
mt76_wr(dev, MT_BBP(RXO, 18), 0xf000a990);
mt76_wr(dev, MT_BBP(AGC, 35), 0x08080808);
@@ -329,15 +340,13 @@ void mt76x2_phy_update_channel_gain(struct mt76x02_dev *dev)
dev->cal.agc_gain_adjust = 0;
} else {
mt76_wr(dev, MT_BBP(RXO, 18), 0xf000a991);
- if (dev->mt76.chandef.width == NL80211_CHAN_WIDTH_80)
- mt76_wr(dev, MT_BBP(AGC, 35), 0x10101014);
- else
- mt76_wr(dev, MT_BBP(AGC, 35), 0x11111116);
- mt76_wr(dev, MT_BBP(AGC, 37), 0x2121262C);
gain_delta = 0;
dev->cal.agc_gain_adjust = low_gain_delta;
}

+ mt76_wr(dev, MT_BBP(AGC, 35), agc_35);
+ mt76_wr(dev, MT_BBP(AGC, 37), agc_37);
+
dev->cal.agc_gain_cur[0] = gain[0] - gain_delta;
dev->cal.agc_gain_cur[1] = gain[1] - gain_delta;
mt76x2_phy_set_gain_val(dev);
--
2.19.1
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