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+From patchwork Thu Aug 29 11:29:59 2019
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+Content-Type: text/plain; charset="utf-8"
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+MIME-Version: 1.0
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+Content-Transfer-Encoding: 7bit
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+X-Patchwork-Submitter: Stanislaw Gruszka <[email protected]>
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+X-Patchwork-Id: 11121089
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+X-Patchwork-Delegate: [email protected]
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+From: Stanislaw Gruszka <[email protected]>
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+To: [email protected]
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+Subject: [PATCH 5.3] Revert "rt2800: enable TX_PIN_CFG_LNA_PE_ bits per band"
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+Date: Thu, 29 Aug 2019 13:29:59 +0200
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+Message-Id: <[email protected]>
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+Sender: [email protected]
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+List-ID: <linux-wireless.vger.kernel.org>
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+X-Mailing-List: [email protected]
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+
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+This reverts commit 9ad3b55654455258a9463384edb40077439d879f.
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+
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+As reported by Sergey:
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+
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+"I got some problem after upgrade kernel to 5.2 version (debian testing
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+linux-image-5.2.0-2-amd64). 5Ghz client stopped to see AP.
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+Some tests with 1metre distance between client-AP: 2.4Ghz -22dBm, for
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+5Ghz - 53dBm !, for longer distance (8m + walls) 2.4 - 61dBm, 5Ghz not
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+visible."
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+
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+It was identified that rx signal level degradation was caused by
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+9ad3b5565445 ("rt2800: enable TX_PIN_CFG_LNA_PE_ bits per band").
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+So revert this commit.
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+
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+Cc: <[email protected]> # v5.1+
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+Reported-and-tested-by: Sergey Maranchuk <[email protected]>
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+Signed-off-by: Stanislaw Gruszka <[email protected]>
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+---
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+ drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 18 ++++++------------
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+ 1 file changed, 6 insertions(+), 12 deletions(-)
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+
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+--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
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++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
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+@@ -4242,24 +4242,18 @@ static void rt2800_config_channel(struct
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+ switch (rt2x00dev->default_ant.rx_chain_num) {
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+ case 3:
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+ /* Turn on tertiary LNAs */
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+- rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A2_EN,
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+- rf->channel > 14);
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+- rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G2_EN,
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+- rf->channel <= 14);
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++ rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A2_EN, 1);
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++ rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G2_EN, 1);
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+ /* fall-through */
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+ case 2:
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+ /* Turn on secondary LNAs */
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+- rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A1_EN,
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+- rf->channel > 14);
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+- rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G1_EN,
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+- rf->channel <= 14);
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++ rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A1_EN, 1);
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++ rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G1_EN, 1);
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+ /* fall-through */
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+ case 1:
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+ /* Turn on primary LNAs */
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+- rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A0_EN,
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+- rf->channel > 14);
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+- rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G0_EN,
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+- rf->channel <= 14);
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++ rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A0_EN, 1);
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++ rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G0_EN, 1);
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+ break;
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+ }
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+
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Daniel Golle