wifi: rtw88: 8822c: add iface combination

Allow 8822c to operate two interface concurrently, only 1 AP mode plus
1 station mode under same frequency is supported. Combination of other
types will not be added until requested.
Signed-off-by: Po-Hao Huang <phhuang@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/20230414121331.18062-1-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/main.c

@@ -103,6 +103,26 @@ static struct ieee80211_rate rtw_ratetable[] = {
 	{.bitrate = 540, .hw_value = 0x0b,},
 };
 
+static const struct ieee80211_iface_limit rtw_iface_limits[] = {
+	{
+		.max = 1,
+		.types = BIT(NL80211_IFTYPE_STATION),
+	},
+	{
+		.max = 1,
+		.types = BIT(NL80211_IFTYPE_AP),
+	}
+};
+
+static const struct ieee80211_iface_combination rtw_iface_combs[] = {
+	{
+		.limits = rtw_iface_limits,
+		.n_limits = ARRAY_SIZE(rtw_iface_limits),
+		.max_interfaces = 2,
+		.num_different_channels = 1,
+	}
+};
+
 u16 rtw_desc_to_bitrate(u8 desc_rate)
 {
 	struct ieee80211_rate rate;
@@ -2205,6 +2225,11 @@ int rtw_register_hw(struct rtw_dev *rtwdev, struct ieee80211_hw *hw)
 	hw->wiphy->max_scan_ssids = RTW_SCAN_MAX_SSIDS;
 	hw->wiphy->max_scan_ie_len = rtw_get_max_scan_ie_len(rtwdev);
 
+	if (rtwdev->chip->id == RTW_CHIP_TYPE_8822C) {
+		hw->wiphy->iface_combinations = rtw_iface_combs;
+		hw->wiphy->n_iface_combinations = ARRAY_SIZE(rtw_iface_combs);
+	}
+
 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_SET_SCAN_DWELL);