From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org
Cc: StanleyYP Wang <StanleyYP.Wang@mediatek.com>,
Shayne Chen <shayne.chen@mediatek.com>,
Felix Fietkau <nbd@nbd.name>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 6.12.y 1/2] wifi: mt76: mt7915: set correct background radar capability
Date: Wed, 9 Sep 2026 21:17:03 -0400 [thread overview]
Message-ID: <20260910011704.3831468-1-sashal@kernel.org> (raw)
In-Reply-To: <2026090457-perpetual-gallstone-572d@gregkh>
From: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
[ Upstream commit 888208d1ccc41bebe97744445787183b17bb3ea4 ]
Some of the variants do not support background radar, so add a
helper to report background radar capability.
For mt7916, only the variant of 5G 2T2R + 1R supports background
radar.
Signed-off-by: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
Reviewed-by: Shayne Chen <shayne.chen@mediatek.com>
Link: https://patch.msgid.link/20250320015909.3948612-1-StanleyYP.Wang@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Stable-dep-of: 44b5adfe4949 ("wifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../wireless/mediatek/mt76/mt7915/debugfs.c | 5 +++
.../wireless/mediatek/mt76/mt7915/eeprom.c | 33 ++++++++++++++++++-
.../wireless/mediatek/mt76/mt7915/eeprom.h | 1 +
.../net/wireless/mediatek/mt76/mt7915/init.c | 7 ++--
.../net/wireless/mediatek/mt76/mt7915/mcu.c | 8 +++--
.../wireless/mediatek/mt76/mt7915/mt7915.h | 3 +-
6 files changed, 49 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index 578013884e438..c170ea1299831 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -444,6 +444,11 @@ mt7915_rdd_monitor(struct seq_file *s, void *data)
mutex_lock(&dev->mt76.mutex);
+ if (!mt7915_eeprom_has_background_radar(dev)) {
+ seq_puts(s, "no background radar capability\n");
+ goto out;
+ }
+
if (!cfg80211_chandef_valid(chandef)) {
ret = -EINVAL;
goto out;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
index b038568e0be91..38dfd5de365ca 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c
@@ -147,7 +147,7 @@ static int mt7915_eeprom_load(struct mt7915_dev *dev)
/* read eeprom data from efuse */
block_num = DIV_ROUND_UP(eeprom_size, eeprom_blk_size);
for (i = 0; i < block_num; i++) {
- ret = mt7915_mcu_get_eeprom(dev, i * eeprom_blk_size);
+ ret = mt7915_mcu_get_eeprom(dev, i * eeprom_blk_size, NULL);
if (ret < 0)
return ret;
}
@@ -359,6 +359,37 @@ s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
return val & MT_EE_RATE_DELTA_SIGN ? delta : -delta;
}
+bool
+mt7915_eeprom_has_background_radar(struct mt7915_dev *dev)
+{
+ u8 val, buf[MT7915_EEPROM_BLOCK_SIZE];
+ u8 band_sel, tx_path, rx_path;
+ int offs = MT_EE_WIFI_CONF + 1;
+
+ switch (mt76_chip(&dev->mt76)) {
+ case 0x7915:
+ return true;
+ case 0x7906:
+ /* read efuse to check background radar capability */
+ if (mt7915_mcu_get_eeprom(dev, offs, buf))
+ break;
+
+ val = buf[offs % MT7915_EEPROM_BLOCK_SIZE];
+ band_sel = u8_get_bits(val, MT_EE_WIFI_CONF0_BAND_SEL);
+ tx_path = u8_get_bits(val, MT_EE_WIFI_CONF0_TX_PATH);
+ rx_path = u8_get_bits(val, MT_EE_WIFI_CONF0_RX_PATH);
+
+ return (band_sel == MT_EE_V2_BAND_SEL_5GHZ &&
+ tx_path == rx_path && rx_path == 2);
+ case 0x7981:
+ case 0x7986:
+ default:
+ break;
+ }
+
+ return false;
+}
+
const u8 mt7915_sku_group_len[] = {
[SKU_CCK] = 4,
[SKU_OFDM] = 8,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h
index 2908e8113e48a..73611c9d26e15 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h
@@ -55,6 +55,7 @@ enum mt7915_eeprom_field {
#define MT_EE_CAL_DPD_SIZE_V2 (300 * MT_EE_CAL_UNIT)
#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)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index b2220ff7d6758..747345df874c0 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -389,9 +389,10 @@ 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_eeprom_has_background_radar(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);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 32e9c0960657a..605ccb3e55822 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -2853,7 +2853,7 @@ int mt7915_mcu_set_eeprom(struct mt7915_dev *dev)
&req, sizeof(req), true);
}
-int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset)
+int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset, u8 *read_buf)
{
struct mt7915_mcu_eeprom_info req = {
.addr = cpu_to_le32(round_down(offset,
@@ -2861,8 +2861,8 @@ int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset)
};
struct mt7915_mcu_eeprom_info *res;
struct sk_buff *skb;
+ u8 *buf = read_buf;
int ret;
- u8 *buf;
ret = mt76_mcu_send_and_get_msg(&dev->mt76,
MCU_EXT_QUERY(EFUSE_ACCESS),
@@ -2871,8 +2871,10 @@ int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset)
return ret;
res = (struct mt7915_mcu_eeprom_info *)skb->data;
- buf = dev->mt76.eeprom.data + le32_to_cpu(res->addr);
+ if (!buf)
+ buf = dev->mt76.eeprom.data + le32_to_cpu(res->addr);
memcpy(buf, res->data, MT7915_EEPROM_BLOCK_SIZE);
+
dev_kfree_skb(skb);
return 0;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index f49d6b2f81e42..f6e67613966d9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -427,6 +427,7 @@ int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
struct ieee80211_channel *chan,
u8 chain_idx);
s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band);
+bool mt7915_eeprom_has_background_radar(struct mt7915_dev *dev);
int mt7915_dma_init(struct mt7915_dev *dev, struct mt7915_phy *phy2);
void mt7915_dma_prefetch(struct mt7915_dev *dev);
void mt7915_dma_cleanup(struct mt7915_dev *dev);
@@ -477,7 +478,7 @@ int mt7915_mcu_set_fixed_rate_ctrl(struct mt7915_dev *dev,
struct ieee80211_sta *sta,
void *data, u32 field);
int mt7915_mcu_set_eeprom(struct mt7915_dev *dev);
-int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset);
+int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset, u8 *read_buf);
int mt7915_mcu_get_eeprom_free_block(struct mt7915_dev *dev, u8 *block_num);
int mt7915_mcu_set_mac(struct mt7915_dev *dev, int band, bool enable,
bool hdr_trans);
--
2.53.0
next prev parent reply other threads:[~2026-09-10 1:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-04 4:48 FAILED: patch "[PATCH] wifi: mt76: mt7915: bound the device EEPROM address before" failed to apply to 6.12-stable tree gregkh
2026-09-10 1:17 ` Sasha Levin [this message]
2026-09-10 1:17 ` [PATCH 6.12.y 2/2] wifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy Sasha Levin
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