mac80211: rt2x00: revert commit causing regression in 5GHz band

[openwrt/staging/jow.git] / package / kernel / mac80211 / patches / rt2x00 / 016-rt2x00-revert-rt2800-enable-TX_PIN_CFG_LNA_PE_-bits-per-band.patch

diff --git a/package/kernel/mac80211/patches/rt2x00/016-rt2x00-revert-rt2800-enable-TX_PIN_CFG_LNA_PE_-bits-per-band.patch b/package/kernel/mac80211/patches/rt2x00/016-rt2x00-revert-rt2800-enable-TX_PIN_CFG_LNA_PE_-bits-per-band.patch
new file mode 100644 (file)
index 0000000..3fcf231
--- /dev/null
+++ b/package/kernel/mac80211/patches/rt2x00/016-rt2x00-revert-rt2800-enable-TX_PIN_CFG_LNA_PE_-bits-per-band.patch
@@ -0,0 +1,70 @@
+From patchwork Thu Aug 29 11:29:59 2019
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+X-Patchwork-Submitter: Stanislaw Gruszka <sgruszka@redhat.com>
+X-Patchwork-Id: 11121089
+X-Patchwork-Delegate: kvalo@adurom.com
+From: Stanislaw Gruszka <sgruszka@redhat.com>
+To: linux-wireless@vger.kernel.org
+Subject: [PATCH 5.3] Revert "rt2800: enable TX_PIN_CFG_LNA_PE_ bits per band"
+Date: Thu, 29 Aug 2019 13:29:59 +0200
+Message-Id: <1567078199-3645-1-git-send-email-sgruszka@redhat.com>
+Sender: linux-wireless-owner@vger.kernel.org
+List-ID: <linux-wireless.vger.kernel.org>
+X-Mailing-List: linux-wireless@vger.kernel.org
+
+This reverts commit 9ad3b55654455258a9463384edb40077439d879f.
+
+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
+9ad3b5565445 ("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>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 18 ++++++------------
+ 1 file changed, 6 insertions(+), 12 deletions(-)
+
+--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+@@ -4242,24 +4242,18 @@ static void rt2800_config_channel(struct
+       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;
+       }
+