[PATCH 6/6] wifi: mt76: mt7915: set correct antenna for radar detection on MT7915D

[Shayne Chen]

For MT7915D, correct antenna index should be set to let DFS radar
detection work on the 5 GHz band.

Signed-off-by: Shayne Chen <shayne.chen at mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7915/mac.c   | 15 +++++++++++++++
 .../net/wireless/mediatek/mt76/mt7915/mt7915.h    |  1 +
 2 files changed, 16 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index be97dede2634..43a7a639cc88 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1814,6 +1814,13 @@ static int mt7915_dfs_start_rdd(struct mt7915_dev *dev, int chain)
 	if (err < 0)
 		return err;
 
+	if (is_mt7915(&dev->mt76)) {
+		err = mt76_connac_mcu_rdd_cmd(&dev->mt76, RDD_SET_WF_ANT, chain,
+					      0, dev->dbdc_support ? 2 : 0);
+		if (err < 0)
+			return err;
+	}
+
 	return mt76_connac_mcu_rdd_cmd(&dev->mt76, RDD_DET_MODE, chain,
 				       MT_RX_SEL0, 1);
 }
@@ -1934,6 +1941,14 @@ int mt7915_dfs_init_radar_detector(struct mt7915_phy *phy)
 	if (err < 0)
 		return err;
 
+	if (is_mt7915(&dev->mt76)) {
+		err = mt76_connac_mcu_rdd_cmd(&dev->mt76, RDD_SET_WF_ANT,
+					      phy->band_idx, 0,
+					      dev->dbdc_support ? 2 : 0);
+		if (err < 0)
+			return err;
+	}
+
 	mt7915_dfs_stop_radar_detector(phy);
 	phy->mt76->dfs_state = MT_DFS_STATE_DISABLED;
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 1eb11617a625..c90a148d6239 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -357,6 +357,7 @@ enum mt7915_rdd_cmd {
 	RDD_DET_MODE,
 	RDD_RADAR_EMULATE,
 	RDD_START_TXQ = 20,
+	RDD_SET_WF_ANT = 30,
 	RDD_CAC_START = 50,
 	RDD_CAC_END,
 	RDD_NORMAL_START,
-- 
2.25.1