f0bc2636ce
All patches automatically rebased. Build system: x86_64 Build-tested: bcm2711/RPi4B, ramips/tplink_archer-a6-v3, filogic/xiaomi_redmi-router-ax6000-ubootmod Run-tested: bcm2711/RPi4B, ramips/tplink_archer-a6-v3, filogic/xiaomi_redmi-router-ax6000-ubootmod Signed-off-by: John Audia <therealgraysky@proton.me>
56 lines
1.6 KiB
Diff
56 lines
1.6 KiB
Diff
From 01649f43afb30df3c7450fd09c04a5a8ee6cb2c1 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Thu, 3 Feb 2022 15:51:41 +0000
|
|
Subject: [PATCH] net: phy: lan87xx: Decrease phy polling rate
|
|
|
|
Polling at 100Hz for 1.5s consumes quite a bit of kworker time with no
|
|
obvious benefit. Reduce that polling rate to ~6Hz.
|
|
|
|
To further save CPU and power, defer the next poll if no energy is
|
|
detected.
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/4780
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/net/phy/smsc.c | 10 +++++++++-
|
|
1 file changed, 9 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/net/phy/smsc.c
|
|
+++ b/drivers/net/phy/smsc.c
|
|
@@ -213,6 +213,8 @@ static int lan87xx_read_status(struct ph
|
|
return err;
|
|
|
|
if (!phydev->link && priv->energy_enable && phydev->irq == PHY_POLL) {
|
|
+ int energy_detected;
|
|
+
|
|
/* Disable EDPD to wake up PHY */
|
|
int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
|
|
if (rc < 0)
|
|
@@ -228,7 +230,7 @@ static int lan87xx_read_status(struct ph
|
|
*/
|
|
read_poll_timeout(phy_read, rc,
|
|
rc & MII_LAN83C185_ENERGYON || rc < 0,
|
|
- 10000, 1500000, true, phydev,
|
|
+ 150000, 1500000, true, phydev,
|
|
MII_LAN83C185_CTRL_STATUS);
|
|
if (rc < 0)
|
|
return rc;
|
|
@@ -238,10 +240,16 @@ static int lan87xx_read_status(struct ph
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
+ energy_detected = !!(rc & MII_LAN83C185_ENERGYON);
|
|
+
|
|
rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
|
|
rc | MII_LAN83C185_EDPWRDOWN);
|
|
if (rc < 0)
|
|
return rc;
|
|
+
|
|
+ /* Save CPU and power by deferring the next poll */
|
|
+ if (!energy_detected)
|
|
+ msleep(2000);
|
|
}
|
|
|
|
return err;
|