[RFC PATCH net v2 0/3] Fix OdroidC2 Gigabit Tx link issue
From: Jerome Brunet
Date: Mon Nov 21 2016 - 10:36:46 EST
This patchset fixes an issue with the OdroidC2 board (DWMAC + RTL8211F).
Initially reported as a low Tx throughput issue at gigabit speed, the
platform enters LPI too often. This eventually break the link (both Tx
and Rx), and require to bring the interface down and up again to get the
Rx path working again.
The root cause of this issue is not fully understood yet but disabling EEE
advertisement on the PHY prevent this feature to be negotiated.
With this change, the link is stable and reliable, with the expected
The patchset adds options in the generic phy driver to disable EEE
advertisement, through device tree. The way it is done is very similar
to the handling of the max-speed property.
This V2 is posted is posted as an RFC. Since it changes the generic PHY
it propably requires to be a bit more careful.
If you are not confortable taking for the coming rc, I can rebase on
Chnages since V1: 
- Disable the advertisement of EEE in the generic code instead of the
 : http://lkml.kernel.org/r/1479220154-25851-1-git-send-email-jbrunet@xxxxxxxxxxxx
Jerome Brunet (3):
net: phy: add an option to disable EEE advertisement
dt: bindings: add ethernet phy eee-disable-advert option documentation
ARM64: dts: meson: odroidc2: disable advertisement EEE for GbE.
Documentation/devicetree/bindings/net/phy.txt | 5 ++
.../arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 15 ++++
drivers/net/phy/phy.c | 3 +
drivers/net/phy/phy_device.c | 80 +++++++++++++++++++---
include/linux/phy.h | 3 +
5 files changed, 97 insertions(+), 9 deletions(-)