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From: Stanislaw Gruszka <sgruszka@redhat.com>
To: Felix Fietkau <nbd@nbd.name>
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
	linux-wireless@vger.kernel.org
Subject: [PATCH v3 2/2] mt76x02: assure we update gain after scan
Date: Thu,  1 Nov 2018 16:35:02 +0100	[thread overview]
Message-ID: <1541086502-21239-2-git-send-email-sgruszka@redhat.com> (raw)
In-Reply-To: <1541086502-21239-1-git-send-email-sgruszka@redhat.com>

Assure that after we initialize dev->cal.low_gain to -1 this
will cause update gain calibration. Otherwise this might or
might not happen depending on value of second bit of low_gain
and values read from registers in mt76x02_phy_adjust_vga_gain().

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
---
 drivers/net/wireless/mediatek/mt76/mt76x0/phy.c   | 3 ++-
 drivers/net/wireless/mediatek/mt76/mt76x02_util.c | 5 ++++-
 drivers/net/wireless/mediatek/mt76/mt76x2/phy.c   | 3 ++-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
index b2cbe4f19023..7eee91bedacc 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
@@ -736,7 +736,8 @@ mt76x0_phy_update_channel_gain(struct mt76x02_dev *dev)
 	low_gain = (dev->cal.avg_rssi_all > mt76x02_get_rssi_gain_thresh(dev)) +
 		   (dev->cal.avg_rssi_all > mt76x02_get_low_rssi_gain_thresh(dev));
 
-	gain_change = (dev->cal.low_gain & 2) ^ (low_gain & 2);
+	gain_change = dev->cal.low_gain < 0 ||
+		      (dev->cal.low_gain & 2) ^ (low_gain & 2);
 	dev->cal.low_gain = low_gain;
 
 	if (!gain_change) {
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
index 8a250224fcd7..87ce6a51fb05 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
@@ -555,8 +555,11 @@ void mt76x02_sw_scan_complete(struct ieee80211_hw *hw,
 	if (mt76_is_mmio(dev))
 		tasklet_enable(&dev->pre_tbtt_tasklet);
 
-	if (dev->cal.gain_init_done)
+	if (dev->cal.gain_init_done) {
+		/* Restore AGC gain and resume calibration after scanning. */
+		dev->cal.low_gain = -1;
 		ieee80211_queue_delayed_work(hw, &dev->cal_work, 0);
+	}
 }
 EXPORT_SYMBOL_GPL(mt76x02_sw_scan_complete);
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c
index bbeff9c19997..1b85fb415548 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/phy.c
@@ -289,7 +289,8 @@ void mt76x2_phy_update_channel_gain(struct mt76x02_dev *dev)
 	low_gain = (dev->cal.avg_rssi_all > mt76x02_get_rssi_gain_thresh(dev)) +
 		   (dev->cal.avg_rssi_all > mt76x02_get_low_rssi_gain_thresh(dev));
 
-	gain_change = (dev->cal.low_gain & 2) ^ (low_gain & 2);
+	gain_change = dev->cal.low_gain < 0 ||
+		      (dev->cal.low_gain & 2) ^ (low_gain & 2);
 	dev->cal.low_gain = low_gain;
 
 	if (!gain_change) {
-- 
2.7.5


  reply	other threads:[~2018-11-01 15:35 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-01 15:35 [PATCH v3 1/2] mt76x02: run calibration after scanning Stanislaw Gruszka
2018-11-01 15:35 ` Stanislaw Gruszka [this message]
2018-11-05 17:02 ` Felix Fietkau

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