mt76: mt7603: make dynamic sensitivity adjustment configurable via debugfs

In some cases it may be useful for debugging to disable this feature
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7603/debugfs.c

@@ -123,4 +123,6 @@ void mt7603_init_debugfs(struct mt7603_dev *dev)
 				    mt7603_radio_read);
 	debugfs_create_u8("sensitivity_limit", 0600, dir,
 			    &dev->sensitivity_limit);
+	debugfs_create_bool("dynamic_sensitivity", 0600, dir,
+			    &dev->dynamic_sensitivity);
 }

drivers/net/wireless/mediatek/mt76/mt7603/init.c

@@ -541,6 +541,7 @@ int mt7603_register_device(struct mt7603_dev *dev)
 
 	dev->slottime = 9;
 	dev->sensitivity_limit = 28;
+	dev->dynamic_sensitivity = true;
 
 	ret = mt7603_init_hardware(dev);
 	if (ret)

drivers/net/wireless/mediatek/mt76/mt7603/mac.c

@@ -1727,6 +1727,9 @@ mt7603_false_cca_check(struct mt7603_dev *dev)
 	int min_signal;
 	u32 val;
 
+	if (!dev->dynamic_sensitivity)
+		return;
+
 	val = mt76_rr(dev, MT_PHYCTRL_STAT_PD);
 	pd_cck = FIELD_GET(MT_PHYCTRL_STAT_PD_CCK, val);
 	pd_ofdm = FIELD_GET(MT_PHYCTRL_STAT_PD_OFDM, val);

drivers/net/wireless/mediatek/mt76/mt7603/mt7603.h

@@ -142,6 +142,7 @@ struct mt7603_dev {
 	u8 ed_strict_mode;
 	u8 ed_strong_signal;
 
+	bool dynamic_sensitivity;
 	s8 sensitivity;
 	u8 sensitivity_limit;