Groups > linux.debian.bugs.dist > #1020121

Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2

From	Dieter <dieter@sarina-ist-doof.de>
Newsgroups	linux.debian.bugs.dist
Subject	Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2
Date	2020-08-02 12:40 +0200
Message-ID	<Azjzk-4OB-9@gated-at.bofh.it> (permalink)
References	<wLscV-8ru-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hello all!

I've made some tests with my Rev C A20 OLinuxino Lime 2 board.
So it uses the RTL8211C Phy.

source used: 2019.01+dfsg-7

The results are somewhat inconclusive i would say.
The board seems to be able to transfer data with TX_DELAY values up to 3.
Retry-counts went up when increasing the delay value.

Also attached are tests with a reversed data-flow, as well as test with
a longer cable.
Default cable: 1m
Long cable: 5m.


What i did not test: if DHCP would work with TX_DELAY=?, as i used
static ip addresses



I did some testing with the RevK board i have at my other place,
TX_DELAY = 3 was the needed value to get good ethernet speeds with that
board.

I can do some more testing if needed!

Best regards,
Dieter

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Thread

Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Dieter <dieter@sarina-ist-doof.de> - 2020-08-02 12:40 +0200
  Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Jonas Smedegaard <jonas@jones.dk> - 2020-08-02 13:00 +0200
    Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Dieter <dieter@sarina-ist-doof.de> - 2020-08-08 11:40 +0200
      Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Jonas Smedegaard <jonas@jones.dk> - 2020-08-08 15:00 +0200
        Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Jonas Smedegaard <jonas@jones.dk> - 2020-08-08 15:50 +0200
          Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Jonas Smedegaard <jonas@jones.dk> - 2020-10-24 05:10 +0200
        Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Dieter <dieter@sarina-ist-doof.de> - 2020-08-14 09:10 +0200
          Bug#911560: Tests for GMAC_TX_DELAY = ... with RevC A20 OLinuxino Lime 2 Jonas Smedegaard <jonas@jones.dk> - 2020-08-14 13:10 +0200

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