From 968dc6335ad94d6a149187b222a54ca6e63c91e3 Mon Sep 17 00:00:00 2001 From: Shayne Chen Date: Fri, 13 Mar 2026 14:21:50 +0800 Subject: [PATCH] wifi: mt76: mt7996: fix capability of EHT-MCS 15 in MRU According to the definition in IEEE Std 802.11be-2024, Table 9-417r: - If 80 MHz is not supported, bit 1-3 are set to 0. - If 160 MHz is not supported, bit 2-3 are set to 0. - If 320 MHz is not supported, bit 3 is set to 0. Fixes: 348533eb968d ("wifi: mt76: mt7996: add EHT capability init") Signed-off-by: Shayne Chen Link: https://patch.msgid.link/20260313062150.3165433-2-shayne.chen@mediatek.com Signed-off-by: Felix Fietkau --- mt7996/init.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/mt7996/init.c b/mt7996/init.c index 7f8a12d9..7b017107 100644 --- a/mt7996/init.c +++ b/mt7996/init.c @@ -1580,7 +1580,6 @@ mt7996_init_eht_caps(struct mt7996_phy *phy, enum nl80211_band band, struct ieee80211_sta_eht_cap *eht_cap = &data->eht_cap; struct ieee80211_eht_cap_elem_fixed *eht_cap_elem = &eht_cap->eht_cap_elem; struct ieee80211_eht_mcs_nss_supp *eht_nss = &eht_cap->eht_mcs_nss_supp; - enum nl80211_chan_width width = phy->mt76->chandef.width; int nss = hweight8(phy->mt76->antenna_mask); int sts = hweight16(phy->mt76->chainmask); u8 val; @@ -1656,11 +1655,16 @@ mt7996_init_eht_caps(struct mt7996_phy *phy, enum nl80211_band band, u8_encode_bits(u8_get_bits(1, GENMASK(1, 0)), IEEE80211_EHT_PHY_CAP5_MAX_NUM_SUPP_EHT_LTF_MASK); - val = width == NL80211_CHAN_WIDTH_320 ? 0xf : - width == NL80211_CHAN_WIDTH_160 ? 0x7 : - width == NL80211_CHAN_WIDTH_80 ? 0x3 : 0x1; - eht_cap_elem->phy_cap_info[6] = - u8_encode_bits(val, IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_MASK); + eht_cap_elem->phy_cap_info[6] = IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_MASK; + if (band != NL80211_BAND_6GHZ) { + eht_cap_elem->phy_cap_info[6] &= + ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ; + + if (band != NL80211_BAND_5GHZ) + eht_cap_elem->phy_cap_info[6] &= + ~(IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ | + IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ); + } val = u8_encode_bits(nss, IEEE80211_EHT_MCS_NSS_RX) | u8_encode_bits(nss, IEEE80211_EHT_MCS_NSS_TX);