wifi: rtw89: 52c: rfk: refine MCC channel info notification

RF calibration will notify FW to backup the calibration result after it
is done on a channel. For MCC (multi-channel concurrency) flow, when we
at RTW89_ENTITY_MODE_MCC_PREPARE mode, RF calibration should execute on
second channel of MCC, i.e. RTW89_SUB_ENTITY_1, and then, notify FW to
backup the result for the second one.

Originally, the RF calibration flow only fit single channel case. We are
planning to support MCC on RTL8852C, so we refine its RF calibration flow
to fit MCC case.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230908031145.20931-2-pkshih@realtek.com

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

@@ -3220,11 +3220,11 @@ int rtw89_fw_h2c_rf_reg(struct rtw89_dev *rtwdev,
 
 int rtw89_fw_h2c_rf_ntfy_mcc(struct rtw89_dev *rtwdev)
 {
-	const struct rtw89_chan *chan = rtw89_chan_get(rtwdev, RTW89_SUB_ENTITY_0);
 	struct rtw89_rfk_mcc_info *rfk_mcc = &rtwdev->rfk_mcc;
 	struct rtw89_fw_h2c_rf_get_mccch *mccch;
 	struct sk_buff *skb;
 	int ret;
+	u8 idx;
 
 	skb = rtw89_fw_h2c_alloc_skb_with_hdr(rtwdev, sizeof(*mccch));
 	if (!skb) {
@@ -3234,12 +3234,13 @@ int rtw89_fw_h2c_rf_ntfy_mcc(struct rtw89_dev *rtwdev)
 	skb_put(skb, sizeof(*mccch));
 	mccch = (struct rtw89_fw_h2c_rf_get_mccch *)skb->data;
 
+	idx = rfk_mcc->table_idx;
 	mccch->ch_0 = cpu_to_le32(rfk_mcc->ch[0]);
 	mccch->ch_1 = cpu_to_le32(rfk_mcc->ch[1]);
 	mccch->band_0 = cpu_to_le32(rfk_mcc->band[0]);
 	mccch->band_1 = cpu_to_le32(rfk_mcc->band[1]);
-	mccch->current_channel = cpu_to_le32(chan->channel);
-	mccch->current_band_type = cpu_to_le32(chan->band_type);
+	mccch->current_channel = cpu_to_le32(rfk_mcc->ch[idx]);
+	mccch->current_band_type = cpu_to_le32(rfk_mcc->band[idx]);
 
 	rtw89_h2c_pkt_set_hdr(rtwdev, skb, FWCMD_TYPE_H2C,
 			      H2C_CAT_OUTSRC, H2C_CL_OUTSRC_RF_FW_NOTIFY,

drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c

@@ -2,6 +2,7 @@
 /* Copyright(c) 2019-2022  Realtek Corporation
  */
 
+#include "chan.h"
 #include "coex.h"
 #include "debug.h"
 #include "phy.h"
@@ -4068,21 +4069,53 @@ void rtw8852c_set_channel_rf(struct rtw89_dev *rtwdev,
 
 void rtw8852c_mcc_get_ch_info(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
 {
-	const struct rtw89_chan *chan = rtw89_chan_get(rtwdev, RTW89_SUB_ENTITY_0);
 	struct rtw89_rfk_mcc_info *rfk_mcc = &rtwdev->rfk_mcc;
-	u8 idx = rfk_mcc->table_idx;
-	int i;
+	DECLARE_BITMAP(map, RTW89_IQK_CHS_NR) = {};
+	const struct rtw89_chan *chan;
+	enum rtw89_entity_mode mode;
+	u8 chan_idx;
+	u8 idx;
+	u8 i;
 
-	for (i = 0; i < RTW89_IQK_CHS_NR; i++) {
-		if (rfk_mcc->ch[idx] == 0)
-			break;
-		if (++idx >= RTW89_IQK_CHS_NR)
-			idx = 0;
+	mode = rtw89_get_entity_mode(rtwdev);
+	switch (mode) {
+	case RTW89_ENTITY_MODE_MCC_PREPARE:
+		chan_idx = RTW89_SUB_ENTITY_1;
+		break;
+	default:
+		chan_idx = RTW89_SUB_ENTITY_0;
+		break;
+	}
+
+	for (i = 0; i <= chan_idx; i++) {
+		chan = rtw89_chan_get(rtwdev, i);
+
+		for (idx = 0; idx < RTW89_IQK_CHS_NR; idx++) {
+			if (rfk_mcc->ch[idx] == chan->channel &&
+			    rfk_mcc->band[idx] == chan->band_type) {
+				if (i != chan_idx) {
+					set_bit(idx, map);
+					break;
+				}
+
+				goto bottom;
+			}
+		}
+	}
+
+	idx = find_first_zero_bit(map, RTW89_IQK_CHS_NR);
+	if (idx == RTW89_IQK_CHS_NR) {
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "%s: no empty rfk table; force replace the first\n",
+			    __func__);
+		idx = 0;
 	}
 
-	rfk_mcc->table_idx = idx;
 	rfk_mcc->ch[idx] = chan->channel;
 	rfk_mcc->band[idx] = chan->band_type;
+
+bottom:
+	rfk_mcc->table_idx = idx;
 }
 
 void rtw8852c_rck(struct rtw89_dev *rtwdev)