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Revert "rt2800: enable TX_PIN_CFG_LNA_PE_ bits per band"

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This reverts commit 9ad3b55654.

As reported by Sergey:

"I got some problem after upgrade kernel to 5.2 version (debian testing
linux-image-5.2.0-2-amd64). 5Ghz client  stopped to see AP.
Some tests with 1metre distance between client-AP: 2.4Ghz  -22dBm, for
5Ghz - 53dBm !, for longer distance (8m + walls) 2.4 - 61dBm, 5Ghz not
visible."

It was identified that rx signal level degradation was caused by
9ad3b55654 ("rt2800: enable TX_PIN_CFG_LNA_PE_ bits per band").
So revert this commit.

Cc: <stable@vger.kernel.org> # v5.1+
Reported-and-tested-by: Sergey Maranchuk <slav0nic0@gmail.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Stanislaw Gruszka 2019-08-29 13:29:59 +02:00 committed by Kalle Valo
parent 14d5e14c8a
commit 13fa451568
1 changed files with 6 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
drivers/net/wireless/ralink/rt2x00/rt2800lib.c
View file

@ -4242,24 +4242,18 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev,
switch (rt2x00dev->default_ant.rx_chain_num) {
case 3:
/* Turn on tertiary LNAs */
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A2_EN,
rf->channel > 14);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G2_EN,
rf->channel <= 14);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A2_EN, 1);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G2_EN, 1);
/* fall-through */
case 2:
/* Turn on secondary LNAs */
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A1_EN,
rf->channel > 14);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G1_EN,
rf->channel <= 14);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A1_EN, 1);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G1_EN, 1);
/* fall-through */
case 1:
/* Turn on primary LNAs */
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A0_EN,
rf->channel > 14);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G0_EN,
rf->channel <= 14);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A0_EN, 1);
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G0_EN, 1);
break;
}