[][kernel][common][eth][Fix Aquantia link speed mismatch issue for downshift evnent]
[Description]
Fix Aquantia link speed mismatch issue for downshift evnent.
When PHY driver detects a downshift event, it will read the current
link speed from the vendor register. In the meantime, PHY hardware
clears the downshift event and no longer triggers.
In this case, the PHY driver only reports the correct link speed once,
then always reports the incorrect link speed back to PHY framework.
If without this patch, ethtool might read the incorrect link speed
after downshift event occured.
[Release-log]
N/A
Change-Id: I3012b7c8a92c14cbe25b251049cbcbb4a1ef6c09
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7178227
diff --git a/target/linux/mediatek/patches-5.4/751-net-phy-aquantia-add-firmware-download.patch b/target/linux/mediatek/patches-5.4/751-net-phy-aquantia-add-firmware-download.patch
index 6eb5bf4..2fe3132 100644
--- a/target/linux/mediatek/patches-5.4/751-net-phy-aquantia-add-firmware-download.patch
+++ b/target/linux/mediatek/patches-5.4/751-net-phy-aquantia-add-firmware-download.patch
@@ -1338,8 +1338,8 @@
+ aqr_firmware_download(phydev);
+#endif
+
- /* ensure that a latched downshift event is cleared */
- aqr107_read_downshift_event(phydev);
+ return aqr107_set_downshift(phydev, MDIO_AN_VEND_PROV_DOWNSHIFT_DFLT);
+ }
@@ -605,6 +609,15 @@ static int aqr107_resume(struct phy_device *phydev)
MDIO_CTRL1_LPOWER);