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mt76x02: assure we update gain after scan

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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>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Stanislaw Gruszka 2018-11-01 16:35:02 +01:00 • committed by Felix Fietkau
commit 4784a3cc3f
3 changed files with 8 additions and 3 deletions
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3
drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
View file

@ -1082,7 +1082,8 @@ 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) {

5
drivers/net/wireless/mediatek/mt76/mt76x02_util.c
View file

@ -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);

3
drivers/net/wireless/mediatek/mt76/mt76x2/phy.c
View file

@ -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) {