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825bb69228
Improve function of Star64 bottom network port phy0 with updated delay values.
Initial upstream patches supporting Star64 use the same vendor board support
package parameters known to result in an unreliable bottom network port.
Success acquiring DHCP lease and no dropped packets to ping LAN address:
rx 900: tx 1500 1650 1800 1950
rx 750: tx 1650 1800 1950
rx 600: tx 1800 1950
rx 1050: tx 1650 1800 1950
rx 1200: tx 1500 1650 1800 1950
rx 1350: tx 1500 1650 1800 1950
rx 1500: tx 1500 1650 1800 1950
rx 1650: tx 1500 1650 1800 1950
rx 1800: tx 1500 1650 1800 1950
rx 1900: tx 1950
rx 1950: tx 1950
Failure acquiring DHCP lease or many dropped packets:
rx 450: tx 1500 1800 1950
rx 600: tx 1200 1350 1650
rx 750: tx 1350 1500
rx 900: tx 1200 1350
rx 1050: tx 1050 1200 1350 1500
rx 1200: tx 1350
rx 1350: tx 1350
rx 1500: tx 1200 1350
rx 1650: tx 1050 1200 1350
rx 1800: tx 1050 1200 1350
rx 1900: tx 1500 1650 1800
rx 1950: tx 1200 1350
Non-functional:
rx 0: tx 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950
rx 150: tx 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950
rx 300: tx 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950
rx 450: tx 0 150 300 450 600 750 900 1050 1200 1350 1650
rx 600: tx 0 150 300 450 600 750 900 1050
rx 750: tx 0 150 300 450 600 750 900 1050 1200
rx 900: tx 0 150 300 450 600 750 900 1050
rx 1050: tx 0 150 300 450 600 750 900
rx 1200: tx 0 150 300 450 600 750 900 1050 1200
rx 1350: tx 0 150 300 450 600 750 900 1050 1200
rx 1500: tx 0 150 300 450 600 750 900 1050
rx 1650: tx 0 150 300 450 600 750 900
rx 1800: tx 0 150 300 450 600 750 900
rx 1900: tx 0 150 300 450 600 750 900 1050 1200 1350
rx 1950: tx 0 150 300 450 600 750 900 1050
Selecting the median of all working rx delay values 1500 combined with tx delay
values 1500, 1650, 1800, and 1950 only the tx delay value of 1950 (default) is
reliable as tested in both Linux 6.11.2 and U-Boot v2024.10
Signed-off-by: E Shattow <e@freeshell.de>
CC: stable@vger.kernel.org
Fixes: 2606bf583b ("riscv: dts: starfive: add Star64 board devicetree")
Acked-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.