wifi: mt76: mt7996: rework background radar check for mt7990

The MT7990 comes in 2T2R and 3T3R variants, with only the 2T2R supporting
background radar.

Signed-off-by: StanleyYP Wang <[email protected]>
Signed-off-by: Shayne Chen <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>

mt7996/eeprom.c

@@ -376,3 +376,30 @@ s8 mt7996_eeprom_get_power_delta(struct mt7996_dev *dev, int band)
 
 	return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
 }
+
+bool mt7996_eeprom_has_background_radar(struct mt7996_dev *dev)
+{
+	switch (mt76_chip(&dev->mt76)) {
+	case MT7996_DEVICE_ID:
+		if (dev->var.type == MT7996_VAR_TYPE_233)
+			return false;
+		break;
+	case MT7992_DEVICE_ID:
+		if (dev->var.type == MT7992_VAR_TYPE_23)
+			return false;
+		break;
+	case MT7990_DEVICE_ID: {
+		u8 path, rx_path, nss, *eeprom = dev->mt76.eeprom.data;
+
+		mt7996_eeprom_parse_stream(eeprom, MT_BAND1, &path, &rx_path, &nss);
+		/* Disable background radar capability in 3T3R */
+		if (path == 3 || rx_path == 3)
+			return false;
+		break;
+		}
+	default:
+		return false;
+	}
+
+	return true;
+}

mt7996/init.c

@@ -476,7 +476,7 @@ mt7996_init_wiphy(struct ieee80211_hw *hw, struct mtk_wed_device *wed)
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER);
 
-	if (mt7996_has_background_radar(dev) &&
+	if (mt7996_eeprom_has_background_radar(dev) &&
 	    (!mdev->dev->of_node ||
 	     !of_property_read_bool(mdev->dev->of_node,
 				    "mediatek,disable-radar-background")))

mt7996/mt7996.h

@@ -488,25 +488,6 @@ mt7996_band_valid(struct mt7996_dev *dev, u8 band)
 	return band <= MT_BAND2;
 }
 
-static inline bool
-mt7996_has_background_radar(struct mt7996_dev *dev)
-{
-	switch (mt76_chip(&dev->mt76)) {
-	case MT7996_DEVICE_ID:
-		if (dev->var.type == MT7996_VAR_TYPE_233)
-			return false;
-		break;
-	case MT7992_DEVICE_ID:
-		if (dev->var.type == MT7992_VAR_TYPE_23)
-			return false;
-		break;
-	default:
-		return false;
-	}
-
-	return true;
-}
-
 static inline struct mt7996_phy *
 mt7996_band_phy(struct mt7996_dev *dev, enum nl80211_band band)
 {
@@ -570,6 +551,7 @@ int mt7996_eeprom_parse_hw_cap(struct mt7996_dev *dev, struct mt7996_phy *phy);
 int mt7996_eeprom_get_target_power(struct mt7996_dev *dev,
 				   struct ieee80211_channel *chan);
 s8 mt7996_eeprom_get_power_delta(struct mt7996_dev *dev, int band);
+bool mt7996_eeprom_has_background_radar(struct mt7996_dev *dev);
 int mt7996_dma_init(struct mt7996_dev *dev);
 void mt7996_dma_reset(struct mt7996_dev *dev, bool force);
 void mt7996_dma_prefetch(struct mt7996_dev *dev);