[U-Boot] Pull request: u-boot-net.git master

[Vladimir Oltean]

On 5/9/19 1:42 AM, Tom Rini wrote:
> On Wed, May 08, 2019 at 10:40:57PM +0000, Vladimir Oltean wrote:
>> On 5/9/19 1:24 AM, Joe Hershberger wrote:
>>> On Tue, May 7, 2019 at 5:15 PM Joe Hershberger <joe.hershberger at ni.com> wrote:
>>>>
>>>> Hi Tom,
>>>>
>>>> The following changes since commit 8d7f06bbbef16f172cd5e9c4923cdcebe16b8980:
>>>>
>>>> I rebased on your master and built for BB Black. DHCP seems to work fine.
>>>> MLO also now fits again.
>>>>
>>>>     Merge branch 'master' of git://git.denx.de/u-boot-sh (2019-05-07 09:38:00 -0400)
>>>>
>>>> are available in the git repository at:
>>>>
>>>>     git://git.denx.de/u-boot-net.git master
>>>>
>>>> for you to fetch changes up to 8d0c6858455e89b089222a08d55ff711681ca011:
>>>>
>>>>     net: phy: micrel: Find Micrel PHY node correctly (2019-05-07 14:51:55 -0500)
>>>>
>>>> ----------------------------------------------------------------
>>>> Carlo Caione (4):
>>>>         net: phy: Add generic helpers to access MMD PHY registers
>>>>         net: phy: ti: use generic helpers to access MMD registers
>>>>         cmd: mdio: Switch to generic helpers when accessing the registers
>>>>         net: phy: realtek: Introduce quirk to mark RXC not stoppable
>>>>
>>>> James Byrne (2):
>>>>         net: phy: micrel: Use correct skew values on KSZ9021
>>>>         net: phy: micrel: Find Micrel PHY node correctly
>>>>
>>>> Murali Karicheri (2):
>>>>         ARM: k2g-gp-evm: update to rgmii pinmux configuration
>>>>         ARM: k2g-ice: Add pinmux support for rgmii interface
>>>>
>>>> Pankaj Bansal (1):
>>>>         drivers: net: ldpaa_eth: fix resource leak
>>>>
>>>> Siva Durga Prasad Paladugu (2):
>>>>         net: phy: Reloc next and prev pointers inside phy_drivers
>>>>         net: phy: Fix return value check phy_probe
>>>>
>>>> Valentin-catalin Neacsu (1):
>>>>         net: phy: aquantia: Set only autoneg on in register 4.c441
>>>>
>>>> Vladimir Oltean (6):
>>>>         net: phy: ar803x: Address packet drops at low traffic rate due to SmartEEE feature
>>>>         net: phy: ar803x: Make RGMII Tx delays actually configurable for AR8035
>>>>         net: phy: ar803x: Use common functions for RGMII internal delays
>>>>         net: phy: ar803x: Clarify the configuration of the CLK_25M output pin
>>>>         net: phy: ar803x: Explicitly disable RGMII delays
>>>
>>> Tom, this [1] is the patch that is breaking the evm. It doesn't affect
>>> BB Black because it uses an SMSC phy, where as this evm uses an
>>> AR8031/AR8033.
>>>
>>> Is it possible the device tree [2] is wrong for the board? It lists
>>> 'phy-mode = "rgmii-txid";', so that means that with this patch the RX
>>> delay is now being disabled.
>>>
>>> Any thoughts, Vladimir?
>>>
>>> Thanks,
>>> -Joe
>>>
>>> [1] b3224e0f7e - "net: phy: ar803x: Explicitly disable RGMII delays"
>>> [2] arch/arm/dts/am335x-evm.dts
>>>
>>>>         net: phy: ar803x: Clarify the intention of ar8021_config
>>>>
>>>>    arch/arm/dts/sama5d3xcm.dtsi                    |  32 +++---
>>>>    arch/arm/dts/sama5d3xcm_cmp.dtsi                |  32 +++---
>>>>    arch/arm/dts/socfpga_arria5_socdk.dts           |   4 +-
>>>>    arch/arm/dts/socfpga_cyclone5_is1.dts           |   4 +-
>>>>    arch/arm/dts/socfpga_cyclone5_socdk.dts         |   4 +-
>>>>    arch/arm/dts/socfpga_cyclone5_sockit.dts        |   4 +-
>>>>    arch/arm/dts/socfpga_cyclone5_vining_fpga.dts   |   4 +-
>>>>    board/ti/ks2_evm/mux-k2g.h                      |  36 +++----
>>>>    cmd/mdio.c                                      |  27 +++--
>>>>    doc/device-tree-bindings/net/micrel-ksz90x1.txt |  27 +++++
>>>>    drivers/net/ldpaa_eth/ldpaa_eth.c               |   1 +
>>>>    drivers/net/phy/Kconfig                         |  41 ++++++++
>>>>    drivers/net/phy/aquantia.c                      |   7 +-
>>>>    drivers/net/phy/atheros.c                       | 128 ++++++++++++++++-------
>>>>    drivers/net/phy/micrel_ksz90x1.c                |  24 ++++-
>>>>    drivers/net/phy/phy.c                           |  21 +++-
>>>>    drivers/net/phy/realtek.c                       |  19 ++++
>>>>    drivers/net/phy/ti.c                            | 130 +++++-------------------
>>>>    include/phy.h                                   |  70 +++++++++++++
>>>>    19 files changed, 394 insertions(+), 221 deletions(-)
>>>>
>>>> Thanks!
>>>> -Joe
>>>> _______________________________________________
>>>> U-Boot mailing list
>>>> U-Boot at lists.denx.de
>>>> https://lists.denx.de/listinfo/u-boot
>>>
>>
>> Hi Joe, Tom,
>>
>> It sounds like what Joe pointed to (my patch) has a high chance of
>> causing link failure.
>> If the board is relying on RX delays in the Atheros PHY to ensure
>> correct RGMII timing budget, then for sure it was working before and now
>> it is broken. In that case, it was working by mistake; the DT blob is
>> broken and should be corrected.
>> Sorry for the trouble this has caused.
> 
> How is this handled in the Linux kernel and/or why doesn't it fail
> there?
> 

On the latest net-next, it's handled the same: disable everything and 
enable only what's specified in phy-mode. I didn't keep track of older 
versions.

-Vladimir