| From b983a5b900627faa49cf37e101d65b56e941c740 Mon Sep 17 00:00:00 2001 |
| From: Stanislaw Gruszka <sgruszka@redhat.com> |
| Date: Wed, 31 Oct 2018 08:32:58 +0100 |
| Subject: mt76x0: do not overwrite other MT_BBP(AGC, 8) fields |
| |
| From: Stanislaw Gruszka <sgruszka@redhat.com> |
| |
| commit b983a5b900627faa49cf37e101d65b56e941c740 upstream. |
| |
| MT_BBP(AGC, 8) register has values depend on band in |
| mt76x0_bbp_switch_tab, so we should not overwrite other fields |
| than MT_BBP_AGC_GAIN when setting gain. |
| |
| This can fix performance issues when connecting to 2.4GHz AP. |
| |
| Fixes: 4636a2544c3b ("mt76x0: phy: align channel gain logic to mt76x2 one") |
| Acked-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> |
| Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> |
| Signed-off-by: Felix Fietkau <nbd@nbd.name> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| |
| --- |
| drivers/net/wireless/mediatek/mt76/mt76x0/phy.c | 4 +--- |
| 1 file changed, 1 insertion(+), 3 deletions(-) |
| |
| --- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c |
| +++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c |
| @@ -817,10 +817,8 @@ done: |
| static void mt76x0_phy_set_gain_val(struct mt76x02_dev *dev) |
| { |
| u8 gain = dev->cal.agc_gain_cur[0] - dev->cal.agc_gain_adjust; |
| - u32 val = 0x122c << 16 | 0xf2; |
| |
| - mt76_wr(dev, MT_BBP(AGC, 8), |
| - val | FIELD_PREP(MT_BBP_AGC_GAIN, gain)); |
| + mt76_rmw_field(dev, MT_BBP(AGC, 8), MT_BBP_AGC_GAIN, gain); |
| } |
| |
| static void |
