Received-SPF: pass (google.com: domain of linux-wireless-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Ryder Lee <ryder.lee@mediatek.com>
To:     Felix Fietkau <nbd@nbd.name>, <linux-wireless@vger.kernel.org>
CC:     Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
        Shayne Chen <shayne.chen@mediatek.com>,
        Evelyn Tsai <evelyn.tsai@mediatek.com>,
        <linux-mediatek@lists.infradead.org>,
        Ryder Lee <ryder.lee@mediatek.com>
Subject: [PATCH] wifi: mt76: mt7915: fix mt7915_mac_set_timing()
Date:   Sat, 1 Oct 2022 07:07:26 +0800
Message-ID: <745d9c4b5c4b7395395025a8dcb5ce68cf360383.1664578145.git.ryder.lee@mediatek.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Correct mac timiing settings for different hardware generations.
This improves 40-60Mbps performance.

Fixes: 9aac2969fe5f ("mt76: mt7915: update mac timing settings")
Reported-By: Carson Vandegriffe <carson.vandegriffe@candelatech.com>
Tested-by: Chad Monroe <chad.monroe@smartrg.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index be97dede2634..09f0fab7c958 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1149,7 +1149,7 @@ void mt7915_mac_set_timing(struct mt7915_phy *phy)
 		  FIELD_PREP(MT_TIMEOUT_VAL_CCA, 48);
 	u32 ofdm = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, 60) |
 		   FIELD_PREP(MT_TIMEOUT_VAL_CCA, 28);
-	int offset;
+	int eifs_ofdm = 360, sifs = 10, offset;
 	bool a_band = !(phy->mt76->chandef.chan->band == NL80211_BAND_2GHZ);
 
 	if (!test_bit(MT76_STATE_RUNNING, &phy->mt76->state))
@@ -1167,6 +1167,18 @@ void mt7915_mac_set_timing(struct mt7915_phy *phy)
 	reg_offset = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, offset) |
 		     FIELD_PREP(MT_TIMEOUT_VAL_CCA, offset);
 
+	if (!is_mt7915(&dev->mt76)) {
+		if (!a_band) {
+			mt76_wr(dev, MT_TMAC_ICR1(phy->band_idx),
+				FIELD_PREP(MT_IFS_EIFS_CCK, 314));
+			eifs_ofdm = 78;
+		} else {
+			eifs_ofdm = 84;
+		}
+	} else if (a_band) {
+		sifs = 16;
+	}
+
 	mt76_wr(dev, MT_TMAC_CDTR(phy->band_idx), cck + reg_offset);
 	mt76_wr(dev, MT_TMAC_ODTR(phy->band_idx), ofdm + reg_offset);
 	mt76_wr(dev, MT_TMAC_ICR0(phy->band_idx),
@@ -1175,9 +1187,6 @@ void mt7915_mac_set_timing(struct mt7915_phy *phy)
 		FIELD_PREP(MT_IFS_SIFS, 10) |
 		FIELD_PREP(MT_IFS_SLOT, phy->slottime));
 
-	mt76_wr(dev, MT_TMAC_ICR1(phy->band_idx),
-		FIELD_PREP(MT_IFS_EIFS_CCK, 314));
-
 	if (phy->slottime < 20 || a_band)
 		val = MT7915_CFEND_RATE_DEFAULT;
 	else
-- 
2.36.1