mt76: mt7615: apply cached RF data for DBDC

Band0 and band1 share the same hardware, so band0 will stop Tx/Rx when
band1 performs Rx calibration. cal_cache is introduced to solve such
corner cases by moving necessary datas from channel_switch to bootup.

Co-developed-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -1698,6 +1698,19 @@ int mt7615_mcu_fw_log_2_host(struct mt7615_dev *dev, u8 ctrl)
 				 sizeof(data), true);
 }
 
+static int mt7615_mcu_cal_cache_apply(struct mt7615_dev *dev)
+{
+	struct {
+		bool cache_enable;
+		u8 pad[3];
+	} data = {
+		.cache_enable = true
+	};
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_CAL_CACHE, &data,
+				 sizeof(data), false);
+}
+
 static int mt7663_load_n9(struct mt7615_dev *dev, const char *name)
 {
 	u32 offset = 0, override_addr = 0, flag = FW_START_DLYCAL;
@@ -1906,9 +1919,14 @@ int mt7615_mcu_init(struct mt7615_dev *dev)
 	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_FWDL], false);
 	dev_dbg(dev->mt76.dev, "Firmware init done\n");
 	set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
-	mt7615_mcu_fw_log_2_host(dev, 0);
 
-	return 0;
+	if (dev->dbdc_support) {
+		ret = mt7615_mcu_cal_cache_apply(dev);
+		if (ret)
+			return ret;
+	}
+
+	return mt7615_mcu_fw_log_2_host(dev, 0);
 }
 EXPORT_SYMBOL_GPL(mt7615_mcu_init);
 

drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h

@@ -531,6 +531,7 @@ enum {
 	MCU_EXT_CMD_TX_POWER_FEATURE_CTRL = 0x58,
 	MCU_EXT_CMD_RXDCOC_CAL = 0x59,
 	MCU_EXT_CMD_TXDPD_CAL = 0x60,
+	MCU_EXT_CMD_CAL_CACHE = 0x67,
 	MCU_EXT_CMD_SET_RDD_TH = 0x7c,
 	MCU_EXT_CMD_SET_RDD_PATTERN = 0x7d,
 };