wifi: rtw89: 8852bt: implement RFK multi-channel handling and support chanctx up to 2

To support multiple channels, 2 for this case, RFK requires to record each
calibration result for each channel in different RFK tables, and also needs
to notify FW. Then, when FW runs in MCC (multi-channel concurrency), it can
switch to the corresponding calibration result according to the channel.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250710042423.73617-13-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/rtw8852bt.c

@@ -533,8 +533,11 @@ static void rtw8852bt_set_channel_help(struct rtw89_dev *rtwdev, bool enter,
 
 static void rtw8852bt_rfk_init(struct rtw89_dev *rtwdev)
 {
+	struct rtw89_rfk_mcc_info *rfk_mcc = &rtwdev->rfk_mcc;
+
 	rtwdev->is_tssi_mode[RF_PATH_A] = false;
 	rtwdev->is_tssi_mode[RF_PATH_B] = false;
+	memset(rfk_mcc, 0, sizeof(*rfk_mcc));
 
 	rtw8852bt_dpk_init(rtwdev);
 	rtw8852bt_rck(rtwdev);
@@ -548,6 +551,7 @@ static void rtw8852bt_rfk_channel(struct rtw89_dev *rtwdev,
 	enum rtw89_chanctx_idx chanctx_idx = rtwvif_link->chanctx_idx;
 	enum rtw89_phy_idx phy_idx = rtwvif_link->phy_idx;
 
+	rtw8852bt_mcc_get_ch_info(rtwdev, phy_idx);
 	rtw89_btc_ntfy_conn_rfk(rtwdev, true);
 
 	rtw8852bt_rx_dck(rtwdev, phy_idx, chanctx_idx);
@@ -558,6 +562,7 @@ static void rtw8852bt_rfk_channel(struct rtw89_dev *rtwdev,
 	rtw8852bt_dpk(rtwdev, phy_idx, chanctx_idx);
 
 	rtw89_btc_ntfy_conn_rfk(rtwdev, false);
+	rtw89_fw_h2c_rf_ntfy_mcc(rtwdev);
 }
 
 static void rtw8852bt_rfk_band_changed(struct rtw89_dev *rtwdev,
@@ -727,6 +732,10 @@ static const struct rtw89_chip_ops rtw8852bt_chip_ops = {
 	.btc_set_policy		= rtw89_btc_set_policy_v1,
 };
 
+static const struct rtw89_chanctx_listener rtw8852bt_chanctx_listener = {
+	.callbacks[RTW89_CHANCTX_CALLBACK_RFK] = rtw8852bt_rfk_chanctx_cb,
+};
+
 #ifdef CONFIG_PM
 static const struct wiphy_wowlan_support rtw_wowlan_stub_8852bt = {
 	.flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT,
@@ -769,6 +778,7 @@ const struct rtw89_chip_info rtw8852bt_chip_info = {
 	.nctl_post_table	= NULL,
 	.dflt_parms		= NULL,
 	.rfe_parms_conf		= NULL,
+	.chanctx_listener	= &rtw8852bt_chanctx_listener,
 	.txpwr_factor_bb	= 3,
 	.txpwr_factor_rf	= 2,
 	.txpwr_factor_mac	= 1,
@@ -777,7 +787,7 @@ const struct rtw89_chip_info rtw8852bt_chip_info = {
 	.tssi_dbw_table		= NULL,
 	.support_macid_num	= RTW89_MAX_MAC_ID_NUM,
 	.support_link_num       = 0,
-	.support_chanctx_num	= 1,
+	.support_chanctx_num	= 2,
 	.support_rnr		= false,
 	.support_bands		= BIT(NL80211_BAND_2GHZ) |
 				  BIT(NL80211_BAND_5GHZ),

drivers/net/wireless/realtek/rtw89/rtw8852bt_rfk.c

@@ -2,6 +2,7 @@
 /* Copyright(c) 2024 Realtek Corporation
  */
 
+#include "chan.h"
 #include "coex.h"
 #include "debug.h"
 #include "fw.h"
@@ -1529,26 +1530,11 @@ static void _iqk_get_ch_info(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy, u
 			     enum rtw89_chanctx_idx chanctx_idx)
 {
 	const struct rtw89_chan *chan = rtw89_chan_get(rtwdev, chanctx_idx);
+	struct rtw89_rfk_mcc_info_data *rfk_mcc = rtwdev->rfk_mcc.data;
 	struct rtw89_iqk_info *iqk_info = &rtwdev->iqk;
-	u8 get_empty_table = false;
+	u8 idx = rfk_mcc->table_idx;
 	u32 reg_rf18;
 	u32 reg_35c;
-	u8 idx;
-
-	for (idx = 0; idx < RTW89_IQK_CHS_NR; idx++) {
-		if (iqk_info->iqk_mcc_ch[idx][path] == 0) {
-			get_empty_table = true;
-			break;
-		}
-	}
-	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[IQK] (1)idx = %x\n", idx);
-
-	if (!get_empty_table) {
-		idx = iqk_info->iqk_table_idx[path] + 1;
-		if (idx > 1)
-			idx = 0;
-	}
-	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[IQK] (2)idx = %x\n", idx);
 
 	reg_rf18 = rtw89_read_rf(rtwdev, path, RR_CFGCH, RFREG_MASK);
 	reg_35c = rtw89_phy_read32_mask(rtwdev, R_CIRST, B_CIRST_SYN);
@@ -1640,7 +1626,8 @@ static void _iqk_afebb_restore(struct rtw89_dev *rtwdev,
 
 static void _iqk_preset(struct rtw89_dev *rtwdev, u8 path)
 {
-	u8 idx = 0;
+	struct rtw89_rfk_mcc_info_data *rfk_mcc = rtwdev->rfk_mcc.data;
+	u8 idx = rfk_mcc->table_idx;
 
 	rtw89_phy_write32_mask(rtwdev, R_COEF_SEL + (path << 8), 0x00000001, idx);
 	rtw89_phy_write32_mask(rtwdev, R_CFIR_LUT + (path << 8), 0x00000008, idx);
@@ -4252,3 +4239,49 @@ void rtw8852bt_set_channel_rf(struct rtw89_dev *rtwdev,
 	rtw8852bt_ctrl_bw_ch(rtwdev, phy_idx, chan->channel, chan->band_type,
 			     chan->band_width);
 }
+
+void rtw8852bt_mcc_get_ch_info(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
+{
+	const struct rtw89_chan *chan = rtw89_mgnt_chan_get(rtwdev, 0);
+	struct rtw89_rfk_mcc_info_data *rfk_mcc = rtwdev->rfk_mcc.data;
+	struct rtw89_rfk_chan_desc desc[__RTW89_RFK_CHS_NR_V0] = {};
+	u8 idx;
+
+	for (idx = 0; idx < ARRAY_SIZE(desc); idx++) {
+		struct rtw89_rfk_chan_desc *p = &desc[idx];
+
+		p->ch = rfk_mcc->ch[idx];
+
+		p->has_band = true;
+		p->band = rfk_mcc->band[idx];
+	}
+
+	idx = rtw89_rfk_chan_lookup(rtwdev, desc, ARRAY_SIZE(desc), chan);
+
+	rfk_mcc->ch[idx] = chan->channel;
+	rfk_mcc->band[idx] = chan->band_type;
+	rfk_mcc->table_idx = idx;
+}
+
+void rtw8852bt_rfk_chanctx_cb(struct rtw89_dev *rtwdev,
+			      enum rtw89_chanctx_state state)
+{
+	struct rtw89_dpk_info *dpk = &rtwdev->dpk;
+	u8 path;
+
+	switch (state) {
+	case RTW89_CHANCTX_STATE_MCC_START:
+		dpk->is_dpk_enable = false;
+		for (path = 0; path < RTW8852BT_SS; path++)
+			_dpk_onoff(rtwdev, path, false);
+		break;
+	case RTW89_CHANCTX_STATE_MCC_STOP:
+		dpk->is_dpk_enable = true;
+		for (path = 0; path < RTW8852BT_SS; path++)
+			_dpk_onoff(rtwdev, path, false);
+		rtw8852bt_dpk(rtwdev, RTW89_PHY_0, RTW89_CHANCTX_0);
+		break;
+	default:
+		break;
+	}
+}

drivers/net/wireless/realtek/rtw89/rtw8852bt_rfk.h

@@ -27,5 +27,8 @@ void rtw8852bt_wifi_scan_notify(struct rtw89_dev *rtwdev, bool scan_start,
 void rtw8852bt_set_channel_rf(struct rtw89_dev *rtwdev,
 			      const struct rtw89_chan *chan,
 			      enum rtw89_phy_idx phy_idx);
+void rtw8852bt_mcc_get_ch_info(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx);
+void rtw8852bt_rfk_chanctx_cb(struct rtw89_dev *rtwdev,
+			      enum rtw89_chanctx_state state);
 
 #endif