From: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> Date: Sun, 22 Jan 2017 23:02:44 +0100 > Currently the dwmac-meson8b stmmac glue driver uses a hardcoded 1/4 > cycle (= 2ns) TX clock delay. This seems to work fine for many boards > (for example Odroid-C2 or Amlogic's reference boards) but there are > some others where TX traffic is simply broken. > There are probably multiple reasons why it's working on some boards > while it's broken on others: > - some of Amlogic's reference boards are using a Micrel PHY > - hardware circuit design > - maybe more... > > iperf3 results on my Mecool BB2 board (Meson GXM, RTL8211F PHY) with > TX clock delay disabled on the MAC (as it's enabled in the PHY driver). > TX throughput was virtually zero before: ... > I get similar TX throughput on my Meson GXBB "MXQ Pro+" board when I > disable the PHY's TX-delay and configure a 4ms TX-delay on the MAC. > So changes to at least the RTL8211F PHY driver are needed to get it > working properly in all situations. Series applied, thanks. -- 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
