From mboxrd@z Thu Jan 1 00:00:00 1970 From: peppe.cavallaro@st.com (Giuseppe CAVALLARO) Date: Mon, 14 Nov 2016 08:47:22 +0100 Subject: stmmac/RTL8211F/Meson GXBB: TX throughput problems In-Reply-To: References: <20161031112524.4c4ee8f8@gmail.com> <1478192276.6632.34.camel@baylibre.com> <3c21b0a4-43c9-0257-f8f2-c8e02cf94fbf@st.com> Message-ID: <68696e92-d056-5f29-9e71-72066f0c7673@st.com> To: linus-amlogic@lists.infradead.org List-Id: linus-amlogic.lists.infradead.org Hello Martin On 11/7/2016 6:37 PM, Martin Blumenstingl wrote: > Hi Peppe, > > On Mon, Nov 7, 2016 at 11:59 AM, Giuseppe CAVALLARO > wrote: >> In the meantime, I will read again the thread just to see if >> there is something I am missing. > if you are re-reading this thread: please note that there are two > devices in discussion here! many thx for the sum :-) > Both are using the Amlogic S905 (GXBB) SoC and both are experiencing > the same issue (Gbit TX issues, RX with Gbit speeds and RX/TX with > 100Mbit speed are NOT affected): > - Odroid-C2 (used by Jerome and Andr? Roth) > - Tronsmart Vega S95 Meta (my device) > > The (Gbit TX) problem seems to be gone on the Odroid-C2 with Jerome's > patch which disables EEE in drivers/net/phy/realtek.c (at least in his > tests, I don't have that device so I can't verify). > The same problem still appears on my Tronsmart Vega S95 Meta even with > the patched PHY driver. just an doubt, maybe useful, in the past, on GiGa setup I saw similar problems and it was due to retiming so maybe 2ns could be necessary (or better granularity via PAD logic if available). Regards Peppe > Unfortunately I don't have a second device to rule out that my > Tronsmart Vega S95 Meta could be broken (not unlikely, I get DDR > errors from time to time in u-boot). Maybe Andreas Faerber can test > ethernet with and without Jerome's patch on one of his Tronsmart > devices. > > > Regards, > Martin >