0027-mt76_-mt7921_-Disable-powersave-features-by-default.patch

From ca89780690f7492c2d357e0ed2213a1d027341ae Mon Sep 17 00:00:00 2001
From: Sultan Alsawaf <sultan@kerneltoast.com>
Date: Sun, 29 May 2022 01:32:19 -0700
Subject: [PATCH] mt76: mt7921: Disable powersave features by default

This brings WiFi latency down considerably and makes latency consistent by
disabling runtime PM and typical powersave features by default. The actual
power consumption difference is inconsequential on desktops and laptops,
while the performance difference is monumental. Latencies of 20+ ms are no
longer observed after this change, and the connection is much more stable.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
---
 drivers/net/wireless/mediatek/mt76/mt7921/init.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/init.c b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
index 91fc41922d95..cfa0bb51004d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
@@ -67,7 +67,8 @@
 
 	wiphy->iface_combinations = if_comb;
 	wiphy->flags &= ~(WIPHY_FLAG_IBSS_RSN | WIPHY_FLAG_4ADDR_AP |
-			  WIPHY_FLAG_4ADDR_STATION);
+			  WIPHY_FLAG_4ADDR_STATION |
+			  WIPHY_FLAG_PS_ON_BY_DEFAULT);
 	wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 				 BIT(NL80211_IFTYPE_AP);
 	wiphy->n_iface_combinations = ARRAY_SIZE(if_comb);
@@ -266,12 +267,6 @@ int mt7921_register_device(struct mt7921_dev *dev)
 	dev->pm.idle_timeout = MT7921_PM_TIMEOUT;
 	dev->pm.stats.last_wake_event = jiffies;
 	dev->pm.stats.last_doze_event = jiffies;
-	if (!mt76_is_usb(&dev->mt76)) {
-		dev->pm.enable_user = true;
-		dev->pm.enable = true;
-		dev->pm.ds_enable_user = true;
-		dev->pm.ds_enable = true;
-	}
 
 	if (!mt76_is_mmio(&dev->mt76))
 		hw->extra_tx_headroom += MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;