This is a note to let you know that I've just added the patch titled
wifi: mt76: mt7915: fix mt7915_mac_set_timing()
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mt76-mt7915-fix-mt7915_mac_set_timing.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6d81927fd5f6c556825930266afc8bbf817bbc7a
Author: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
Date: Sat Oct 1 09:42:44 2022 +0800
wifi: mt76: mt7915: fix mt7915_mac_set_timing()
[ 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@xxxxxxxxxxxxxxx>
Tested-by: Chad Monroe <chad.monroe@xxxxxxxxxxx>
Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 49aa5c056063..68e1cf5a1044 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1146,7 +1146,7 @@ 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))
@@ -1164,17 +1164,26 @@ 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
