[U-Boot] [PATCH] revert "tsec: Force TBI PHY to 1000Mbps full duplex in SGMII mode"

[Li Yang-R58472]

>Subject: Re: [U-Boot] [PATCH] revert "tsec: Force TBI PHY to 1000Mbps full
>duplex in SGMII mode"
>
>Hi Zhao,
>
>> In message <1289986984-2314-1-git-send-email-b26998 at freescale.com> you
>wrote:
>> > On P2020DS and MPC8572DS, the link to SGMII card which use Vitesse
>> > VSC8234 PHY can't come up. Current TBI PHY settings(TBICR_SETTINGS)
>> > for SGMII mode cause link problems.
>> >
>> > Revert commit 46e91674fb4b6d06c6a4984c0b5ac7d9a16923f4, and fix it.
>
>Based on my company's discussions with Freescale and Freescale's appnotes
>I believe that the current implementation is correct.  I make reference to
>some of this in the original patch:
>http://old.nabble.com/-U-Boot---PATCH--tsec:-Force-TBI-PHY-to-1000Mbps-
>full-duplex-in-SGMII-mode-td26188785.html
>
>We use Broadcom PHYs on our boards, which likely has something to do with
>the discrepancies between the P2020DS/MPC8572DS vs the
>XPedite5370/XPedite5500.  Unless you have additional information that
>shows that in-band SGMII auto-negotiation does work per the spec I'd
>prefer to keep the current tsec.c code and add CONFIG_TSEC_TBICR_SETTINGS
>workarounds to the P2020DS (already done in commit
>90b5bf211b85eee10c34cbeb907ce381142b7c99?) and MPC8572DS.


Hi Peter,