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 throughput performance. 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 net-next instead. Chnages since V1: [1] - Disable the advertisement of EEE in the generic code instead of the realtek driver. [1] : 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(-) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
