wifi: rtw89: rfk: add H2C command to trigger IQK

IQ signal calibration is a basic and important calibration to yield good RF
performance. Do this calibration on AP channel if we are going to connect.
During scanning phase, it transmits with low data rate, so without IQK
RF performance is still acceptable.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240202030642.108385-4-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/fw.c

@@ -4593,6 +4593,41 @@ int rtw89_fw_h2c_rf_pre_ntfy(struct rtw89_dev *rtwdev,
 	return ret;
 }
 
+int rtw89_fw_h2c_rf_iqk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
+{
+	struct rtw89_h2c_rf_iqk *h2c;
+	u32 len = sizeof(*h2c);
+	struct sk_buff *skb;
+	int ret;
+
+	skb = rtw89_fw_h2c_alloc_skb_with_hdr(rtwdev, len);
+	if (!skb) {
+		rtw89_err(rtwdev, "failed to alloc skb for h2c RF IQK\n");
+		return -ENOMEM;
+	}
+	skb_put(skb, len);
+	h2c = (struct rtw89_h2c_rf_iqk *)skb->data;
+
+	h2c->phy_idx = cpu_to_le32(phy_idx);
+	h2c->dbcc = cpu_to_le32(rtwdev->dbcc_en);
+
+	rtw89_h2c_pkt_set_hdr(rtwdev, skb, FWCMD_TYPE_H2C,
+			      H2C_CAT_OUTSRC, H2C_CL_OUTSRC_RF_FW_RFK,
+			      H2C_FUNC_RFK_IQK_OFFLOAD, 0, 0, len);
+
+	ret = rtw89_h2c_tx(rtwdev, skb, false);
+	if (ret) {
+		rtw89_err(rtwdev, "failed to send h2c\n");
+		goto fail;
+	}
+
+	return 0;
+fail:
+	dev_kfree_skb_any(skb);
+
+	return ret;
+}
+
 int rtw89_fw_h2c_raw_with_hdr(struct rtw89_dev *rtwdev,
 			      u8 h2c_class, u8 h2c_func, u8 *buf, u16 len,
 			      bool rack, bool dack)

drivers/net/wireless/realtek/rtw89/fw.h

@@ -3935,6 +3935,7 @@ enum rtw89_mcc_h2c_func {
 #define H2C_CL_OUTSRC_RF_FW_RFK		0xb
 
 enum rtw89_rfk_offload_h2c_func {
+	H2C_FUNC_RFK_IQK_OFFLOAD = 0x1,
 	H2C_FUNC_RFK_PRE_NOTIFY = 0x8,
 };
 
@@ -3982,6 +3983,11 @@ struct rtw89_fw_h2c_rfk_pre_info {
 	} __packed mlo;
 } __packed;
 
+struct rtw89_h2c_rf_iqk {
+	__le32 phy_idx;
+	__le32 dbcc;
+} __packed;
+
 enum rtw89_rf_log_type {
 	RTW89_RF_RUN_LOG = 0,
 	RTW89_RF_RPT_LOG = 1,
@@ -4169,6 +4175,7 @@ int rtw89_fw_h2c_rf_reg(struct rtw89_dev *rtwdev,
 int rtw89_fw_h2c_rf_ntfy_mcc(struct rtw89_dev *rtwdev);
 int rtw89_fw_h2c_rf_pre_ntfy(struct rtw89_dev *rtwdev,
 			     enum rtw89_phy_idx phy_idx);
+int rtw89_fw_h2c_rf_iqk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx);
 int rtw89_fw_h2c_raw_with_hdr(struct rtw89_dev *rtwdev,
 			      u8 h2c_class, u8 h2c_func, u8 *buf, u16 len,
 			      bool rack, bool dack);