From: "René van Dorst" <opensource@vdorst.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Sean Wang <sean.wang@mediatek.com>,
Florian Fainelli <f.fainelli@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Matthias Brugger <matthias.bgg@gmail.com>,
Vivien Didelot <vivien.didelot@gmail.com>,
netdev@vger.kernel.org, john@phrozen.org,
linux-mediatek@lists.infradead.org, linux-mips@vger.kernel.org
Subject: Re: [PATCH net-next 0/2] net: mediatek: Add MT7621 TRGMII mode support
Date: Mon, 17 Jun 2019 23:20:04 +0000 [thread overview]
Message-ID: <20190617232004.Horde.mAVymZdeb9Jjf29W2PeOggU@www.vdorst.com> (raw)
In-Reply-To: <20190617214428.GO17551@lunn.ch>
Quoting Andrew Lunn <andrew@lunn.ch>:
Hi Andrew,
> On Mon, Jun 17, 2019 at 09:33:12PM +0000, René van Dorst wrote:
>> Quoting Andrew Lunn <andrew@lunn.ch>:
>>
>> >On Sun, Jun 16, 2019 at 08:20:08PM +0200, René van Dorst wrote:
>> >>Like many other mediatek SOCs, the MT7621 SOC and the internal MT7530
>> >>switch both
>> >>supports TRGMII mode. MT7621 TRGMII speed is 1200MBit.
>> >
>> >Hi René
>> >
>>
>> Hi Andrew,
>>
>> >Is TRGMII used only between the SoC and the Switch? Or does external
>> >ports of the switch also support 1200Mbit/s? If external ports support
>> >this, what does ethtool show for Speed?
>>
>> Only the first GMAC of the SOC and port 6 of the switch supports this mode.
>> The switch can be internal in the SOC but also a separate chip.
>>
>> PHYLINK and ethertool reports the link as 1Gbit.
>> The link is fixed-link with speed = 1000.
>>
>> dmesg output with unposted PHYLINK patches:
>> [ 5.236763] mt7530 mdio-bus:1f: configuring for fixed/trgmii link mode
>> [ 5.249813] mt7530 mdio-bus:1f: phylink_mac_config:
>> mode=fixed/trgmii/1Gbps/Full adv=00,00000000,00000220 pause=12 link=1 an=1
>> [ 6.389435] mtk_soc_eth 1e100000.ethernet eth0: phylink_mac_config:
>> mode=fixed/trgmii/1Gbps/Full adv=00,00000000,00000220 pause=12 link=1 an=1
>
> With PHYLINK, you can probably set the fixed link to the true 1.2Gbps.
By adding some extra speed states in the code it seems to work.
+ if (state->speed == 1200)
+ mcr |= PMCR_FORCE_SPEED_1000;
dmesg:
[ 5.261375] mt7530 mdio-bus:1f: configuring for fixed/trgmii link mode
[ 5.274390] mt7530 mdio-bus:1f: phylink_mac_config:
mode=fixed/trgmii/Unsupported (update phy-core.c)/Full
adv=00,00000000,00000200 pause=12 link=1 an=1
[ 6.296614] mtk_soc_eth 1e100000.ethernet eth0: configuring for
fixed/trgmii link mode
[ 6.313608] mtk_soc_eth 1e100000.ethernet eth0: phylink_mac_config:
mode=fixed/trgmii/Unsupported (update phy core.c)/Full
adv=00,00000000,00000200 pause=12 link=1 an=1
# ethtool eth0
Settings for eth0:
Supported ports: [ MII ]
Supported link modes: Not reported
Supported pause frame use: No
Supports auto-negotiation: No
Supported FEC modes: Not reported
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 1200Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Current message level: 0x000000ff (255)
drv probe link timer ifdown ifup rx_err tx_err
Link detected: yes
>> # ethtool eth0
>> Settings for eth0:
>> Supported ports: [ MII ]
>> Supported link modes: 1000baseT/Full
>> Supported pause frame use: No
>> Supports auto-negotiation: No
>> Supported FEC modes: Not reported
>> Advertised link modes: 1000baseT/Full
>> Advertised pause frame use: No
>> Advertised auto-negotiation: No
>> Advertised FEC modes: Not reported
>> Speed: 1000Mb/s
>
> We could consider adding 1200BaseT/Full?
I don't have any opinion about this.
It is great that it shows nicely in ethtool but I think supporting more
speeds in phy_speed_to_str() is enough.
Also you may want to add other SOCs trgmii ranges too:
- 1200BaseT/Full for mt7621 only
- 2000BaseT/Full for mt7623 and mt7683
- 2600BaseT/Full for mt7623 only
I leave the decision to you.
Greats,
René
>
> Andrew
next prev parent reply other threads:[~2019-06-17 23:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-16 18:20 [PATCH net-next 0/2] net: mediatek: Add MT7621 TRGMII mode support René van Dorst
2019-06-16 18:20 ` [PATCH net-next 1/2] net: ethernet: " René van Dorst
2019-06-16 18:20 ` [PATCH net-next 2/2] net: dsa: mt7530: " René van Dorst
2019-06-17 14:02 ` [PATCH net-next 0/2] net: mediatek: " Andrew Lunn
2019-06-17 21:33 ` René van Dorst
2019-06-17 21:44 ` Andrew Lunn
2019-06-17 23:20 ` René van Dorst [this message]
2019-06-18 1:53 ` Andrew Lunn
2019-06-18 2:21 ` Florian Fainelli
2019-06-18 11:46 ` René van Dorst
2019-06-17 22:19 ` Florian Fainelli
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=20190617232004.Horde.mAVymZdeb9Jjf29W2PeOggU@www.vdorst.com \
--to=opensource@vdorst.com \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=f.fainelli@gmail.com \
--cc=john@phrozen.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-mips@vger.kernel.org \
--cc=matthias.bgg@gmail.com \
--cc=netdev@vger.kernel.org \
--cc=sean.wang@mediatek.com \
--cc=vivien.didelot@gmail.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).