2023-09-19 19:57:45

by Felix Fietkau

Subject: [PATCH wireless] wifi: mt76: mt76x02: fix MT76x0 external LNA gain handling

On MT76x0, LNA gain should be applied for both external and internal LNA.
On MT76x2, LNA gain should be treated as 0 for external LNA.
Move the LNA type based logic to mt76x2 in order to fix mt76x0.

Fixes: 2daa67588f34 ("mt76x0: unify lna_gain parsing")
Reported-by: Shiji Yang <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
---
drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c | 7 -------
drivers/net/wireless/mediatek/mt76/mt76x2/eeprom.c | 13 +++++++++++--
2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
index 0acabba2d1a5..5d402cf2951c 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
@@ -131,15 +131,8 @@ u8 mt76x02_get_lna_gain(struct mt76x02_dev *dev,
s8 *lna_2g, s8 *lna_5g,
struct ieee80211_channel *chan)
{
- u16 val;
u8 lna;

- val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1);
- if (val & MT_EE_NIC_CONF_1_LNA_EXT_2G)
- *lna_2g = 0;
- if (val & MT_EE_NIC_CONF_1_LNA_EXT_5G)
- memset(lna_5g, 0, sizeof(s8) * 3);
-
if (chan->band == NL80211_BAND_2GHZ)
lna = *lna_2g;
else if (chan->hw_value <= 64)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt76x2/eeprom.c
index d5809408d1d3..8c01855885ce 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/eeprom.c
@@ -256,7 +256,8 @@ void mt76x2_read_rx_gain(struct mt76x02_dev *dev)
struct ieee80211_channel *chan = dev->mphy.chandef.chan;
int channel = chan->hw_value;
s8 lna_5g[3], lna_2g;
- u8 lna;
+ bool use_lna;
+ u8 lna = 0;
u16 val;

if (chan->band == NL80211_BAND_2GHZ)
@@ -275,7 +276,15 @@ void mt76x2_read_rx_gain(struct mt76x02_dev *dev)
dev->cal.rx.mcu_gain |= (lna_5g[1] & 0xff) << 16;
dev->cal.rx.mcu_gain |= (lna_5g[2] & 0xff) << 24;

- lna = mt76x02_get_lna_gain(dev, &lna_2g, lna_5g, chan);
+ val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1);
+ if (chan->band == NL80211_BAND_2GHZ)
+ use_lna = !(val & MT_EE_NIC_CONF_1_LNA_EXT_2G);
+ else
+ use_lna = !(val & MT_EE_NIC_CONF_1_LNA_EXT_5G);
+
+ if (use_lna)
+ lna = mt76x02_get_lna_gain(dev, &lna_2g, lna_5g, chan);
+
dev->cal.rx.lna_gain = mt76x02_sign_extend(lna, 8);
}
EXPORT_SYMBOL_GPL(mt76x2_read_rx_gain);
--
2.41.0

2023-09-20 03:41:35

by Kalle Valo

Subject: Re: [PATCH wireless] wifi: mt76: mt76x02: fix MT76x0 external LNA gain handling

Felix Fietkau <[email protected]> writes:

> On MT76x0, LNA gain should be applied for both external and internal LNA.
> On MT76x2, LNA gain should be treated as 0 for external LNA.
> Move the LNA type based logic to mt76x2 in order to fix mt76x0.
>
> Fixes: 2daa67588f34 ("mt76x0: unify lna_gain parsing")
> Reported-by: Shiji Yang <[email protected]>
> Signed-off-by: Felix Fietkau <[email protected]>

I assigned this to me on patchwork.

--
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

2023-09-22 07:41:26

by Kalle Valo

Subject: Re: [PATCH wireless] wifi: mt76: mt76x02: fix MT76x0 external LNA gain handling

Felix Fietkau <[email protected]> wrote:

> On MT76x0, LNA gain should be applied for both external and internal LNA.
> On MT76x2, LNA gain should be treated as 0 for external LNA.
> Move the LNA type based logic to mt76x2 in order to fix mt76x0.
>
> Fixes: 2daa67588f34 ("mt76x0: unify lna_gain parsing")
> Reported-by: Shiji Yang <[email protected]>
> Signed-off-by: Felix Fietkau <[email protected]>

Patch applied to wireless.git, thanks.

684e45e120b8 wifi: mt76: mt76x02: fix MT76x0 external LNA gain handling

--
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches