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From:   Shayne Chen <shayne.chen@mediatek.com>
To:     Felix Fietkau <nbd@nbd.name>
CC:     linux-wireless <linux-wireless@vger.kernel.org>,
        Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
        Ryder Lee <ryder.lee@mediatek.com>,
        linux-mediatek <linux-mediatek@lists.infradead.org>,
        Shayne Chen <shayne.chen@mediatek.com>
Subject: [PATCH] mt76: mt7915: fix txpower init for TSSI off chips
Date:   Thu, 1 Apr 2021 10:31:29 +0800
Message-ID: <20210401023129.31941-1-shayne.chen@mediatek.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Fix incorrect txpower init value for TSSI off chips which causes
too small txpower.

Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
---
 .../wireless/mediatek/mt76/mt7915/eeprom.c    | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
index a7ffc20..18be0d6 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
@@ -124,7 +124,7 @@ int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
 				   struct ieee80211_channel *chan,
 				   u8 chain_idx)
 {
-	int index;
+	int index, target_power;
 	bool tssi_on;
 
 	if (chain_idx > 3)
@@ -133,15 +133,22 @@ int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
 	tssi_on = mt7915_tssi_enabled(dev, chan->band);
 
 	if (chan->band == NL80211_BAND_2GHZ) {
-		index = MT_EE_TX0_POWER_2G + chain_idx * 3 + !tssi_on;
+		index = MT_EE_TX0_POWER_2G + chain_idx * 3;
+		target_power = mt7915_eeprom_read(dev, index);
+
+		if (!tssi_on)
+			target_power += mt7915_eeprom_read(dev, index + 1);
 	} else {
-		int group = tssi_on ?
-			    mt7915_get_channel_group(chan->hw_value) : 8;
+		int group = mt7915_get_channel_group(chan->hw_value);
+
+		index = MT_EE_TX0_POWER_5G + chain_idx * 12;
+		target_power = mt7915_eeprom_read(dev, index + group);
 
-		index = MT_EE_TX0_POWER_5G + chain_idx * 12 + group;
+		if (!tssi_on)
+			target_power += mt7915_eeprom_read(dev, index + 8);
 	}
 
-	return mt7915_eeprom_read(dev, index);
+	return target_power;
 }
 
 s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
-- 
2.18.0