From: Andrew Lunn <andrew@lunn.ch>
To: "Voon, Weifeng" <weifeng.voon@intel.com>
Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
"Sit, Michael Wei Hong" <michael.wei.hong.sit@intel.com>,
"peppe.cavallaro@st.com" <peppe.cavallaro@st.com>,
"alexandre.torgue@st.com" <alexandre.torgue@st.com>,
"joabreu@synopsys.com" <joabreu@synopsys.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"kuba@kernel.org" <kuba@kernel.org>,
"mcoquelin.stm32@gmail.com" <mcoquelin.stm32@gmail.com>,
"Ong, Boon Leong" <boon.leong.ong@intel.com>,
"qiangqing.zhang@nxp.com" <qiangqing.zhang@nxp.com>,
"Wong, Vee Khee" <vee.khee.wong@intel.com>,
"fugang.duan@nxp.com" <fugang.duan@nxp.com>,
"Chuah, Kim Tatt" <kim.tatt.chuah@intel.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-stm32@st-md-mailman.stormreply.com"
<linux-stm32@st-md-mailman.stormreply.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"hkallweit1@gmail.com" <hkallweit1@gmail.com>
Subject: Re: [PATCH net-next 1/2] net: stmmac: enable 2.5Gbps link speed
Date: Fri, 2 Apr 2021 14:34:59 +0200 [thread overview]
Message-ID: <YGcPc3dan0ocRSG2@lunn.ch> (raw)
In-Reply-To: <SN6PR11MB3136F7A7ACA1A5C324031607887A9@SN6PR11MB3136.namprd11.prod.outlook.com>
On Fri, Apr 02, 2021 at 07:45:04AM +0000, Voon, Weifeng wrote:
> > > + /* 2.5G mode only support 2500baseT full duplex only */
> > > + if (priv->plat->has_gmac4 && priv->plat->speed_2500_en) {
> > > + phylink_set(mac_supported, 2500baseT_Full);
> > > + phylink_set(mask, 10baseT_Half);
> > > + phylink_set(mask, 10baseT_Full);
> > > + phylink_set(mask, 100baseT_Half);
> > > + phylink_set(mask, 100baseT_Full);
> > > + phylink_set(mask, 1000baseT_Half);
> > > + phylink_set(mask, 1000baseT_Full);
> > > + phylink_set(mask, 1000baseKX_Full);
> >
> > Why? This seems at odds to the comment above?
>
> > What about 2500baseX_Full ?
>
> The comments explain that the PCS<->PHY link is in 2500BASE-X
> and why 10/100/1000 link speed is mutually exclusive with 2500.
> But the connected external PHY are twisted pair cable which only
> supports 2500baseT_full.
The PHY should indicate what modes its supports. The PHY drivers
get_features() call should set supported to only 2500baseT_Full, if
that is all it supports.
What modes are actually used should then be the intersect of what both
the MAC and the PHY indicate they can do.
Andrew
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-04-02 12:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 15:01 [PATCH net-next 0/2] Enable 2.5Gbps speed for stmmac Michael Sit Wei Hong
2021-04-01 15:01 ` [PATCH net-next 1/2] net: stmmac: enable 2.5Gbps link speed Michael Sit Wei Hong
2021-04-01 15:10 ` Russell King - ARM Linux admin
2021-04-02 7:45 ` Voon, Weifeng
2021-04-02 12:34 ` Andrew Lunn [this message]
2021-04-05 9:07 ` Voon, Weifeng
2021-04-05 12:43 ` Andrew Lunn
2021-04-01 15:01 ` [PATCH net-next 2/2] net: pcs: configure xpcs 2.5G speed mode Michael Sit Wei Hong
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YGcPc3dan0ocRSG2@lunn.ch \
--to=andrew@lunn.ch \
--cc=alexandre.torgue@st.com \
--cc=boon.leong.ong@intel.com \
--cc=davem@davemloft.net \
--cc=fugang.duan@nxp.com \
--cc=hkallweit1@gmail.com \
--cc=joabreu@synopsys.com \
--cc=kim.tatt.chuah@intel.com \
--cc=kuba@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-stm32@st-md-mailman.stormreply.com \
--cc=linux@armlinux.org.uk \
--cc=mcoquelin.stm32@gmail.com \
--cc=michael.wei.hong.sit@intel.com \
--cc=netdev@vger.kernel.org \
--cc=peppe.cavallaro@st.com \
--cc=qiangqing.zhang@nxp.com \
--cc=vee.khee.wong@intel.com \
--cc=weifeng.voon@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).