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rt2800: fix LNA gain assignment for MT7620 

The base value used for MT7620 differs from Rt5392 which resulted in
quite bad RX signal quality. Fix this by using the correct base value as
well as the LNA calibration values for HT20.

Reported-by: Tom Psyborg <pozega.tomislav@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Daniel Golle 2017-04-17 21:30:12 +02:00 committed by Kalle Valo
parent 0b16e0e98e
commit 225a644aae
1 changed files with 16 additions and 2 deletions
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18
drivers/net/wireless/ralink/rt2x00/rt2800lib.c
View File

@ -3806,11 +3806,25 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev,
}
if (rt2x00_rt(rt2x00dev, RT5592) || rt2x00_rt(rt2x00dev, RT6352)) {
reg = 0x10;
if (!conf_is_ht40(conf)) {
if (rt2x00_rt(rt2x00dev, RT6352) &&
rt2x00_has_cap_external_lna_bg(rt2x00dev)) {
reg |= 0x5;
} else {
reg |= 0xa;
}
}
rt2800_bbp_write(rt2x00dev, 195, 141);
rt2800_bbp_write(rt2x00dev, 196, conf_is_ht40(conf) ? 0x10 : 0x1a);
rt2800_bbp_write(rt2x00dev, 196, reg);
/* AGC init */
reg = (rf->channel <= 14 ? 0x1c : 0x24) + 2 * rt2x00dev->lna_gain;
if (rt2x00_rt(rt2x00dev, RT6352))
reg = 0x04;
else
reg = rf->channel <= 14 ? 0x1c : 0x24;
reg += 2 * rt2x00dev->lna_gain;
rt2800_bbp_write_with_rx_chain(rt2x00dev, 66, reg);
rt2800_iq_calibrate(rt2x00dev, rf->channel);