[PATCH 4/5] wifi: mt76: mt7921: add auto regdomain switch support
JB Tsai
jb.tsai at mediatek.com
Sun Feb 22 23:38:53 PST 2026
Implement 802.11d-based automatic regulatory domain switching to
dynamically determine the regulatory domain at runtime.
Signed-off-by: JB Tsai <jb.tsai at mediatek.com>
---
.../wireless/mediatek/mt76/mt76_connac_mcu.h | 3 +-
.../net/wireless/mediatek/mt76/mt7921/mac.c | 3 +
.../net/wireless/mediatek/mt76/mt7921/main.c | 12 ++-
.../net/wireless/mediatek/mt76/mt7921/mcu.c | 3 +-
.../net/wireless/mediatek/mt76/mt7921/regd.c | 81 +++++++++++++++++--
.../net/wireless/mediatek/mt76/mt7921/regd.h | 2 +
6 files changed, 93 insertions(+), 11 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h
index f44977f9093d..263778be4a34 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h
@@ -1586,7 +1586,7 @@ struct mt76_connac_hw_scan_done {
u8 pno_enabled;
u8 pad2[3];
u8 sparse_channel_valid_num;
- u8 pad3[3];
+ u8 alpha2[3];
u8 channel_num[MT76_CONNAC_SCAN_DONE_EVENT_MAX_CHANNEL_NUM];
/* idle format for channel_idle_time
* 0: first bytes: idle time(ms) 2nd byte: dwell time(ms)
@@ -1599,6 +1599,7 @@ struct mt76_connac_hw_scan_done {
u8 mdrdy_count[MT76_CONNAC_SCAN_DONE_EVENT_MAX_CHANNEL_NUM];
__le32 beacon_2g_num;
__le32 beacon_5g_num;
+ __le16 channel_scan_time[MT76_CONNAC_SCAN_DONE_EVENT_MAX_CHANNEL_NUM];
} __packed;
struct mt76_connac_sched_scan_req {
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index 03b4960db73f..bcca4b17e8f2 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -7,6 +7,7 @@
#include "mt7921.h"
#include "../dma.h"
#include "../mt76_connac2_mac.h"
+#include "regd.h"
#include "mcu.h"
#define MT_WTBL_TXRX_CAP_RATE_OFFSET 7
@@ -697,6 +698,8 @@ void mt7921_mac_reset_work(struct work_struct *work)
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7921_vif_connect_iter, NULL);
mt76_connac_power_save_sched(&dev->mt76.phy, pm);
+
+ mt7921_regd_change(&dev->phy, "00");
}
void mt7921_coredump_work(struct work_struct *work)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index 00ca3d3f3ef0..dfe8cbd7dfa5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -1027,8 +1027,16 @@ void mt7921_scan_work(struct work_struct *work)
rxd = (struct mt76_connac2_mcu_rxd *)skb->data;
if (rxd->eid == MCU_EVENT_SCHED_SCAN_DONE) {
ieee80211_sched_scan_results(phy->mt76->hw);
- } else if (test_and_clear_bit(MT76_HW_SCANNING,
- &phy->mt76->state)) {
+ } else if (rxd->eid == MCU_EVENT_SCAN_DONE) {
+ struct mt76_connac_hw_scan_done *event = NULL;
+
+ skb_pull(skb, sizeof(*rxd));
+ event = (struct mt76_connac_hw_scan_done *)skb->data;
+ mt7921_regd_change(phy, event->alpha2);
+ }
+
+ if (test_and_clear_bit(MT76_HW_SCANNING,
+ &phy->mt76->state)) {
struct cfg80211_scan_info info = {
.aborted = false,
};
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index 1e2afa736cdf..4e455aad2f4c 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -487,7 +487,8 @@ static int mt7921_load_clc(struct mt792x_dev *dev, const char *fw_name)
goto out;
}
}
- ret = mt7921_mcu_set_clc(dev, "00", ENVIRON_INDOOR);
+
+ ret = mt7921_regd_init(phy);
out:
release_firmware(fw);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/regd.c b/drivers/net/wireless/mediatek/mt76/mt7921/regd.c
index f795ee2eb446..b53fa1f5c6db 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/regd.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/regd.c
@@ -111,26 +111,93 @@ int mt7921_mcu_regd_update(struct mt792x_dev *dev, u8 *alpha2,
EXPORT_SYMBOL_GPL(mt7921_mcu_regd_update);
void mt7921_regd_notifier(struct wiphy *wiphy,
- struct regulatory_request *request)
+ struct regulatory_request *req)
{
struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
struct mt792x_dev *dev = mt792x_hw_dev(hw);
struct mt76_connac_pm *pm = &dev->pm;
+ struct mt76_dev *mdev = &dev->mt76;
+
+ /* do not need to update the same country twice */
+ if (!memcmp(req->alpha2, mdev->alpha2, 2) &&
+ dev->country_ie_env == req->country_ie_env)
+ return;
- memcpy(dev->mt76.alpha2, request->alpha2, sizeof(dev->mt76.alpha2));
- dev->mt76.region = request->dfs_region;
- dev->country_ie_env = request->country_ie_env;
+ memcpy(mdev->alpha2, req->alpha2, 2);
+ mdev->region = req->dfs_region;
+ dev->country_ie_env = req->country_ie_env;
- if (request->initiator == NL80211_REGDOM_SET_BY_USER) {
+ if (req->initiator == NL80211_REGDOM_SET_BY_USER) {
if (dev->mt76.alpha2[0] == '0' && dev->mt76.alpha2[1] == '0')
wiphy->regulatory_flags &= ~REGULATORY_COUNTRY_IE_IGNORE;
else
wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_IGNORE;
}
+ dev->regd_change = true;
+
if (pm->suspended)
return;
- mt7921_mcu_regd_update(dev, request->alpha2,
- request->country_ie_env);
+ mt7921_mcu_regd_update(dev, req->alpha2,
+ req->country_ie_env);
+}
+
+static bool
+mt7921_regd_is_valid_alpha2(const char *alpha2)
+{
+ if (!alpha2)
+ return false;
+
+ if (alpha2[0] == '0' && alpha2[1] == '0')
+ return true;
+
+ if (isalpha(alpha2[0]) && isalpha(alpha2[1]))
+ return true;
+
+ return false;
+}
+
+int mt7921_regd_change(struct mt792x_phy *phy, char *alpha2)
+{
+ struct wiphy *wiphy = phy->mt76->hw->wiphy;
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct mt792x_dev *dev = mt792x_hw_dev(hw);
+ struct mt76_dev *mdev = &dev->mt76;
+
+ if (dev->hw_full_reset)
+ return 0;
+
+ if (!mt7921_regd_is_valid_alpha2(alpha2) ||
+ !mt7921_regd_clc_supported(dev))
+ return -EINVAL;
+
+ if (mdev->alpha2[0] != '0' && mdev->alpha2[1] != '0')
+ return 0;
+
+ /* do not need to update the same country twice */
+ if (!memcmp(alpha2, mdev->alpha2, 2))
+ return 0;
+
+ if (phy->chip_cap & MT792x_CHIP_CAP_11D_EN)
+ return regulatory_hint(wiphy, alpha2);
+ else
+ return mt7921_mcu_set_clc(dev, alpha2, ENVIRON_INDOOR);
+}
+EXPORT_SYMBOL_GPL(mt7921_regd_change);
+
+int mt7921_regd_init(struct mt792x_phy *phy)
+{
+ struct wiphy *wiphy = phy->mt76->hw->wiphy;
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct mt792x_dev *dev = mt792x_hw_dev(hw);
+ struct mt76_dev *mdev = &dev->mt76;
+
+ if (phy->chip_cap & MT792x_CHIP_CAP_11D_EN)
+ wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_IGNORE |
+ REGULATORY_DISABLE_BEACON_HINTS;
+ else
+ memzero_explicit(&mdev->alpha2, sizeof(mdev->alpha2));
+
+ return 0;
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/regd.h b/drivers/net/wireless/mediatek/mt76/mt7921/regd.h
index da5bd4450312..f125427192b6 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/regd.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/regd.h
@@ -11,5 +11,7 @@ int mt7921_mcu_regd_update(struct mt792x_dev *dev, u8 *alpha2,
void mt7921_regd_notifier(struct wiphy *wiphy,
struct regulatory_request *request);
bool mt7921_regd_clc_supported(struct mt792x_dev *dev);
+int mt7921_regd_change(struct mt792x_phy *phy, char *alpha2);
+int mt7921_regd_init(struct mt792x_phy *phy);
#endif
--
2.45.2
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