[PATCH 4.20.x 1/7] mt76x0: do not overwrite other MT_BBP(AGC, 8) fields
From: Stanislaw Gruszka <hidden>
Date: 2019-01-22 12:38:42
Also in:
stable
Subsystem:
mediatek mt76 wireless lan driver, the rest · Maintainers:
Felix Fietkau, Lorenzo Bianconi, Ryder Lee, Linus Torvalds
commit b983a5b900627faa49cf37e101d65b56e941c740 upstream.
MT_BBP(AGC, 8) register has values depend on band in
mt76x0_bbp_switch_tab, so we should not overwrite other fields
than MT_BBP_AGC_GAIN when setting gain.
This can fix performance issues when connecting to 2.4GHz AP.
Fixes: 4636a2544c3b ("mt76x0: phy: align channel gain logic to mt76x2 one")
Acked-by: Lorenzo Bianconi <redacted>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Stanislaw Gruszka <redacted>
---
drivers/net/wireless/mediatek/mt76/mt76x0/phy.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
index cf024950e0ed..1af2a1227924 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c@@ -817,10 +817,8 @@ static void mt76x0_temp_sensor(struct mt76x02_dev *dev) static void mt76x0_phy_set_gain_val(struct mt76x02_dev *dev) { u8 gain = dev->cal.agc_gain_cur[0] - dev->cal.agc_gain_adjust; - u32 val = 0x122c << 16 | 0xf2; - mt76_wr(dev, MT_BBP(AGC, 8), - val | FIELD_PREP(MT_BBP_AGC_GAIN, gain)); + mt76_rmw_field(dev, MT_BBP(AGC, 8), MT_BBP_AGC_GAIN, gain); } static void
--
1.9.3