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- From 0109238d62a99ea779a7e28e21868118e7b8d69d Mon Sep 17 00:00:00 2001
- From: Daniel Golle <daniel@makrotopia.org>
- Date: Mon, 10 Apr 2017 14:28:14 +0200
- Subject: [PATCH 1/2] rt2800: fix LNA gain assignment for MT7620
- To: Stanislaw Gruszka <sgruszka@redhat.com>
- Cc: Helmut Schaa <helmut.schaa@googlemail.com>,
- linux-wireless@vger.kernel.org,
- Kalle Valo <kvalo@codeaurora.org>
- 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>
- ---
- drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 18 ++++++++++++++++--
- 1 file changed, 16 insertions(+), 2 deletions(-)
- diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
- index ba06ac2d876d..7135519a638c 100644
- --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
- +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
- @@ -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);
- --
- 2.12.2
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