mt76: mt7915: support TxBF for DBDC

With this patch, TxBF can be run on both bands simultaneously.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/init.c

@@ -169,6 +169,13 @@ static int mt7915_txbf_init(struct mt7915_dev *dev)
 {
 	int ret;
 
+
+	if (dev->dbdc_support) {
+		ret = mt7915_mcu_set_txbf_module(dev);
+		if (ret)
+			return ret;
+	}
+
 	/* trigger sounding packets */
 	ret = mt7915_mcu_set_txbf_sounding(dev);
 	if (ret)

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -3401,6 +3401,25 @@ int mt7915_mcu_set_ser(struct mt7915_dev *dev, u8 action, u8 set, u8 band)
 				 &req, sizeof(req), false);
 }
 
+int mt7915_mcu_set_txbf_module(struct mt7915_dev *dev)
+{
+#define MT_BF_MODULE_UPDATE               25
+	struct {
+		u8 action;
+		u8 bf_num;
+		u8 bf_bitmap;
+		u8 bf_sel[8];
+		u8 rsv[8];
+	} __packed req = {
+		.action = MT_BF_MODULE_UPDATE,
+		.bf_num = 2,
+		.bf_bitmap = GENMASK(1, 0),
+	};
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD(TXBF_ACTION), &req,
+				 sizeof(req), true);
+}
+
 int mt7915_mcu_set_txbf_type(struct mt7915_dev *dev)
 {
 #define MT_BF_TYPE_UPDATE		20

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -341,6 +341,7 @@ int mt7915_mcu_set_pm(struct mt7915_dev *dev, int band, int enter);
 int mt7915_mcu_set_sku_en(struct mt7915_phy *phy, bool enable);
 int mt7915_mcu_set_sku(struct mt7915_phy *phy);
 int mt7915_mcu_set_txbf_type(struct mt7915_dev *dev);
+int mt7915_mcu_set_txbf_module(struct mt7915_dev *dev);
 int mt7915_mcu_set_txbf_sounding(struct mt7915_dev *dev);
 int mt7915_mcu_set_fcc5_lpn(struct mt7915_dev *dev, int val);
 int mt7915_mcu_set_pulse_th(struct mt7915_dev *dev,