recipes-wifi/linux-mt76/files/patches/1048-wifi-mt76-mt7915-add-background-radar-hw-cap-check.patch

From 04882a33afbee2fd86cdb244a0faf0748f163b31 Mon Sep 17 00:00:00 2001
From: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
Date: Mon, 4 Mar 2024 11:29:06 +0800
Subject: [PATCH 1048/1052] wifi: mt76: mt7915: add background radar hw cap
 check

Signed-off-by: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
---
 mt7915/debugfs.c |  5 +++++
 mt7915/eeprom.h  | 30 ++++++++++++++++++++++++++++++
 mt7915/init.c    |  7 ++++---
 3 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/mt7915/debugfs.c b/mt7915/debugfs.c
index f031b54c..3fd1654c 100644
--- a/mt7915/debugfs.c
+++ b/mt7915/debugfs.c
@@ -459,6 +459,11 @@ mt7915_rdd_monitor(struct seq_file *s, void *data)
 
 	mutex_lock(&dev->mt76.mutex);
 
+	if (!mt7915_get_background_radar_cap(dev)) {
+		seq_puts(s, "no background radar capability\n");
+		goto out;
+	}
+
 	if (!cfg80211_chandef_valid(chandef)) {
 		ret = -EINVAL;
 		goto out;
diff --git a/mt7915/eeprom.h b/mt7915/eeprom.h
index 70fca0b3..adeee104 100644
--- a/mt7915/eeprom.h
+++ b/mt7915/eeprom.h
@@ -55,6 +55,7 @@ enum mt7915_eeprom_field {
 #define MT_EE_CAL_DPD_SIZE_V2_7981		(102 * MT_EE_CAL_UNIT)	/* no 6g dpd data */
 
 #define MT_EE_WIFI_CONF0_TX_PATH		GENMASK(2, 0)
+#define MT_EE_WIFI_CONF0_RX_PATH		GENMASK(5, 3)
 #define MT_EE_WIFI_CONF0_BAND_SEL		GENMASK(7, 6)
 #define MT_EE_WIFI_CONF1_BAND_SEL		GENMASK(7, 6)
 #define MT_EE_WIFI_CONF_STREAM_NUM		GENMASK(7, 5)
@@ -206,6 +207,35 @@ mt7915_get_cal_dpd_size(struct mt7915_dev *dev)
 		return MT_EE_CAL_DPD_SIZE_V2;
 }
 
+static inline bool
+mt7915_get_background_radar_cap(struct mt7915_dev *dev)
+{
+	u8 buf[MT7915_EEPROM_BLOCK_SIZE];
+	int val, band_sel, tx_path, rx_path, offs = MT_EE_WIFI_CONF + 1;
+
+	switch (mt76_chip(&dev->mt76)) {
+	case 0x7915:
+		return 1;
+	case 0x7906:
+		if (!mt7915_mcu_get_eeprom(dev, offs, buf)) {
+			val = buf[offs % MT7915_EEPROM_BLOCK_SIZE];
+			band_sel = FIELD_GET(MT_EE_WIFI_CONF0_BAND_SEL, val);
+			rx_path = FIELD_GET(MT_EE_WIFI_CONF0_RX_PATH, val);
+			tx_path = FIELD_GET(MT_EE_WIFI_CONF0_TX_PATH, val);
+
+			return (band_sel == MT_EE_V2_BAND_SEL_5GHZ &&
+				tx_path == rx_path && rx_path == 2);
+		}
+		break;
+	case 0x7981:
+	case 0x7986:
+	default:
+		break;
+	}
+
+	return 0;
+}
+
 extern const u8 mt7915_sku_group_len[MAX_SKU_RATE_GROUP_NUM];
 
 #endif
diff --git a/mt7915/init.c b/mt7915/init.c
index e8a6fcda..03c86ae0 100644
--- a/mt7915/init.c
+++ b/mt7915/init.c
@@ -405,9 +405,10 @@ mt7915_init_wiphy(struct mt7915_phy *phy)
 	if (!is_mt7915(&dev->mt76))
 		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_STA_TX_PWR);
 
-	if (!mdev->dev->of_node ||
-	    !of_property_read_bool(mdev->dev->of_node,
-				   "mediatek,disable-radar-background"))
+	if (mt7915_get_background_radar_cap(phy->dev) &&
+	    (!mdev->dev->of_node ||
+	     !of_property_read_bool(mdev->dev->of_node,
+				    "mediatek,disable-radar-background")))
 		wiphy_ext_feature_set(wiphy,
 				      NL80211_EXT_FEATURE_RADAR_BACKGROUND);
 
-- 
2.18.0