wifi: rtw89: enable dynamic antenna gain based on country

The dynamic antenna gain (DAG) considers the country, meaning DAG can
be activated only when countries and regulatory domains allow it.

Signed-off-by: Kuan-Chung Chen <damon.chen@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250306021144.12854-4-pkshih@realtek.com

3 files changed, 23 insertions, 3 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 074c865e6d03..b8f46207141e 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -4666,6 +4666,7 @@ enum rtw89_ant_gain_domain_type {
 struct rtw89_ant_gain_info {
 	s8 offset[RTW89_ANT_GAIN_CHAIN_NUM][RTW89_ANT_GAIN_SUBBAND_NR];
 	u32 regd_enabled;
+	bool block_country;
 };
 
 struct rtw89_6ghz_span {
diff --git a/drivers/net/wireless/realtek/rtw89/phy.c b/drivers/net/wireless/realtek/rtw89/phy.c
index abc2a7e989eb..bd736417f467 100644
--- a/drivers/net/wireless/realtek/rtw89/phy.c
+++ b/drivers/net/wireless/realtek/rtw89/phy.c
@@ -2044,7 +2044,7 @@ static s8 rtw89_phy_ant_gain_offset(struct rtw89_dev *rtwdev, u8 band, u32 cente
 	if (!chip->support_ant_gain)
 		return 0;
 
-	if (!(ant_gain->regd_enabled & BIT(regd)))
+	if (ant_gain->block_country || !(ant_gain->regd_enabled & BIT(regd)))
 		return 0;
 
 	offset_patha = rtw89_phy_ant_gain_query(rtwdev, RF_PATH_A, center_freq);
@@ -2057,10 +2057,14 @@ s16 rtw89_phy_ant_gain_pwr_offset(struct rtw89_dev *rtwdev,
 				  const struct rtw89_chan *chan)
 {
 	struct rtw89_ant_gain_info *ant_gain = &rtwdev->ant_gain;
+	const struct rtw89_chip_info *chip = rtwdev->chip;
 	u8 regd = rtw89_regd_get(rtwdev, chan->band_type);
 	s8 offset_patha, offset_pathb;
 
-	if (!(ant_gain->regd_enabled & BIT(regd)))
+	if (!chip->support_ant_gain)
+		return 0;
+
+	if (ant_gain->block_country || !(ant_gain->regd_enabled & BIT(regd)))
 		return 0;
 
 	offset_patha = rtw89_phy_ant_gain_query(rtwdev, RF_PATH_A, chan->freq);
@@ -2079,7 +2083,8 @@ int rtw89_print_ant_gain(struct rtw89_dev *rtwdev, char *buf, size_t bufsz,
 	char *p = buf, *end = buf + bufsz;
 	s8 offset_patha, offset_pathb;
 
-	if (!chip->support_ant_gain || !(ant_gain->regd_enabled & BIT(regd))) {
+	if (!(chip->support_ant_gain && (ant_gain->regd_enabled & BIT(regd))) ||
+	    ant_gain->block_country) {
 		p += scnprintf(p, end - p, "no DAG is applied\n");
 		goto out;
 	}
diff --git a/drivers/net/wireless/realtek/rtw89/regd.c b/drivers/net/wireless/realtek/rtw89/regd.c
index d31403f9009e..655323a79608 100644
--- a/drivers/net/wireless/realtek/rtw89/regd.c
+++ b/drivers/net/wireless/realtek/rtw89/regd.c
@@ -733,6 +733,19 @@ static void rtw89_regd_apply_policy_tas(struct rtw89_dev *rtwdev)
 	tas->block_regd = !test_bit(RTW89_REGD_FUNC_TAS, regd->func_bitmap);
 }
 
+static void rtw89_regd_apply_policy_ant_gain(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_regulatory_info *regulatory = &rtwdev->regulatory;
+	struct rtw89_ant_gain_info *ant_gain = &rtwdev->ant_gain;
+	const struct rtw89_chip_info *chip = rtwdev->chip;
+	const struct rtw89_regd *regd = regulatory->regd;
+
+	if (!chip->support_ant_gain)
+		return;
+
+	ant_gain->block_country = !test_bit(RTW89_REGD_FUNC_DAG, regd->func_bitmap);
+}
+
 static void rtw89_regd_notifier_apply(struct rtw89_dev *rtwdev,
 				      struct wiphy *wiphy,
 				      struct regulatory_request *request)
@@ -751,6 +764,7 @@ static void rtw89_regd_notifier_apply(struct rtw89_dev *rtwdev,
 	rtw89_regd_apply_policy_unii4(rtwdev, wiphy);
 	rtw89_regd_apply_policy_6ghz(rtwdev, wiphy);
 	rtw89_regd_apply_policy_tas(rtwdev);
+	rtw89_regd_apply_policy_ant_gain(rtwdev);
 }
 
 static