[PATCH 6.1 0455/1146] wifi: mt76: mt7915: fix mt7915_mac_set_timing()

Greg Kroah-Hartman
2022-12-28T15:59:07Z

From: Ryder Lee <ryder.lee@mediatek.com>

[ Upstream commit 0c881dc08fd71ca2673f31a64989fbb28eac26f4 ]

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>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../net/wireless/mediatek/mt76/mt7915/mac.c | 21 +++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index a4bcc617c1a3..7ae9c4bd9c86 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1151,7 +1151,7 @@ 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))
@@ -1169,17 +1169,26 @@ 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),
- FIELD_PREP(MT_IFS_EIFS_OFDM, a_band ? 84 : 78) |
+ FIELD_PREP(MT_IFS_EIFS_OFDM, eifs_ofdm) |
FIELD_PREP(MT_IFS_RIFS, 2) |
- FIELD_PREP(MT_IFS_SIFS, 10) |
+ FIELD_PREP(MT_IFS_SIFS, sifs) |
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
--
2.35.1