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From:   greearb@candelatech.com
To:     linux-wireless@vger.kernel.org
Cc:     Ben Greear <greearb@candelatech.com>
Subject: [PATCH v2 6/8] mt76 - mt7915: Fix he_mcs capabilities for 160mhz.
Date:   Wed, 14 Jul 2021 14:44:30 -0700
Message-Id: <20210714214432.15162-6-greearb@candelatech.com>
In-Reply-To: <20210714214432.15162-1-greearb@candelatech.com>
References: <20210714214432.15162-1-greearb@candelatech.com>
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From: Ben Greear <greearb@candelatech.com>

At 160, this chip can only do 2x2 NSS.  Fix the features
accordingly, verified it shows up properly in iw phy foo info
now.

Signed-off-by: Ben Greear <greearb@candelatech.com>
---
 drivers/net/wireless/mediatek/mt76/mt7915/init.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 08fa918c310b..0e8296a2d75a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -614,12 +614,19 @@ mt7915_init_he_caps(struct mt7915_phy *phy, enum nl80211_band band,
 {
 	int i, idx = 0, nss = hweight8(phy->mt76->chainmask);
 	u16 mcs_map = 0;
+	u16 mcs_map_160 = 0;
 
 	for (i = 0; i < 8; i++) {
 		if (i < nss)
 			mcs_map |= (IEEE80211_HE_MCS_SUPPORT_0_11 << (i * 2));
 		else
 			mcs_map |= (IEEE80211_HE_MCS_NOT_SUPPORTED << (i * 2));
+
+		/* Can do 1/2 of NSS streams in 160Mhz mode. */
+		if (i < nss/2)
+			mcs_map_160 |= (IEEE80211_HE_MCS_SUPPORT_0_11 << (i * 2));
+		else
+			mcs_map_160 |= (IEEE80211_HE_MCS_NOT_SUPPORTED << (i * 2));
 	}
 
 	for (i = 0; i < NUM_NL80211_IFTYPES; i++) {
@@ -721,10 +728,10 @@ mt7915_init_he_caps(struct mt7915_phy *phy, enum nl80211_band band,
 
 		he_mcs->rx_mcs_80 = cpu_to_le16(mcs_map);
 		he_mcs->tx_mcs_80 = cpu_to_le16(mcs_map);
-		he_mcs->rx_mcs_160 = cpu_to_le16(mcs_map);
-		he_mcs->tx_mcs_160 = cpu_to_le16(mcs_map);
-		he_mcs->rx_mcs_80p80 = cpu_to_le16(mcs_map);
-		he_mcs->tx_mcs_80p80 = cpu_to_le16(mcs_map);
+		he_mcs->rx_mcs_160 = cpu_to_le16(mcs_map_160);
+		he_mcs->tx_mcs_160 = cpu_to_le16(mcs_map_160);
+		he_mcs->rx_mcs_80p80 = cpu_to_le16(mcs_map_160);
+		he_mcs->tx_mcs_80p80 = cpu_to_le16(mcs_map_160);
 
 		mt7915_set_stream_he_txbf_caps(he_cap, i, nss);
 
-- 
2.20.1