linux-kernel - [PATCH 4.19 118/118] mt76x0: run vco calibration for each channel configuration

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Date:   Mon, 26 Nov 2018 11:51:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sid Hayn <sidhayn@...il.com>,
        Lorenzo Bianconi <lorenzo.bianconi@...hat.com>,
        Felix Fietkau <nbd@....name>,
        Stanislaw Gruszka <sgruszka@...hat.com>
Subject: [PATCH 4.19 118/118] mt76x0: run vco calibration for each channel configuration

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>

commit 473f0a763d2c7cd68a6dedf51e7d81e8f58f78ac upstream.

According to vendor sdk, vco calibration has to be executed
for each channel configuration whereas mcu calibration has to be
performed during channel scanning. This patch fixes the mt76x0
monitor mode issue since in that configuration vco calibration
was never executed

Fixes: 10de7a8b4ab9 ("mt76x0: phy files")
Tested-by: Sid Hayn <sidhayn@...il.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
Signed-off-by: Felix Fietkau <nbd@....name>
Cc: Stanislaw Gruszka <sgruszka@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/mediatek/mt76/mt76x0/phy.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
@@ -757,10 +757,10 @@ __mt76x0_phy_set_channel(struct mt76x0_d
 	/* Vendor driver don't do it */
 	/* mt76x0_phy_set_tx_power(dev, channel, rf_bw_band); */
 
+	mt76x0_vco_cal(dev, channel);
 	if (scan)
-		mt76x0_vco_cal(dev, channel);
+		mt76x0_mcu_calibrate(dev, MCU_CAL_RXDCOC, 1);
 
-	mt76x0_mcu_calibrate(dev, MCU_CAL_RXDCOC, 1);
 	mt76x0_phy_set_chan_pwr(dev, channel);
 
 	dev->mt76.chandef = *chandef;