From: Choong Yong Liang <yong.liang.choong@linux•intel.com>
To: Andrew Lunn <andrew@lunn•ch>
Cc: "Rajneesh Bhardwaj" <irenic.rajneesh@gmail•com>,
"David E Box" <david.e.box@linux•intel.com>,
"Hans de Goede" <hdegoede@redhat•com>,
"Mark Gross" <markgross@kernel•org>,
"Jose Abreu" <Jose.Abreu@synopsys•com>,
"Heiner Kallweit" <hkallweit1@gmail•com>,
"Russell King" <linux@armlinux•org.uk>,
"David S . Miller" <davem@davemloft•net>,
"Eric Dumazet" <edumazet@google•com>,
"Jakub Kicinski" <kuba@kernel•org>,
"Paolo Abeni" <pabeni@redhat•com>,
"Marek Behún" <kabel@kernel•org>,
"Jean Delvare" <jdelvare@suse•com>,
"Guenter Roeck" <linux@roeck-us•net>,
"Giuseppe Cavallaro" <peppe.cavallaro@st•com>,
"Alexandre Torgue" <alexandre.torgue@foss•st.com>,
"Jose Abreu" <joabreu@synopsys•com>,
"Maxime Coquelin" <mcoquelin.stm32@gmail•com>,
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"Philipp Zabel" <p.zabel@pengutronix•de>,
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"Jesse Brandeburg" <jesse.brandeburg@intel•com>,
"Revanth Kumar Uppala" <ruppala@nvidia•com>,
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"Andrey Konovalov" <andrey.konovalov@linaro•org>,
"Jochen Henneberg" <jh@henneberg-systemdesign•com>,
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bpf@vger•kernel.org, "Voon Wei Feng" <weifeng.voon@intel•com>,
"Tan Tee Min" <tee.min.tan@linux•intel.com>,
"Michael Sit Wei Hong" <michael.wei.hong.sit@intel•com>,
"Lai Peter Jun Ann" <jun.ann.lai@intel•com>
Subject: Re: [PATCH net-next v2 0/5] TSN auto negotiation between 1G and 2.5G
Date: Thu, 10 Aug 2023 17:52:10 +0800 [thread overview]
Message-ID: <5e113258-7cb4-e503-5009-e46cd3aa5bee@linux.intel.com> (raw)
In-Reply-To: <5bd05ba2-fd88-4e5c-baed-9971ff917484@lunn.ch>
On 4/8/2023 8:04 pm, Andrew Lunn wrote:
> On Fri, Aug 04, 2023 at 04:45:22PM +0800, Choong Yong Liang wrote:
>> Intel platforms’ integrated Gigabit Ethernet controllers support
>> 2.5Gbps mode statically using BIOS programming. In the current
>> implementation, the BIOS menu provides an option to select between
>> 10/100/1000Mbps and 2.5Gbps modes. Based on the selection, the BIOS
>> programs the Phase Lock Loop (PLL) registers. The BIOS also read the
>> TSN lane registers from Flexible I/O Adapter (FIA) block and provided
>> 10/100/1000Mbps/2.5Gbps information to the stmmac driver. But
>> auto-negotiation between 10/100/1000Mbps and 2.5Gbps is not allowed.
>> The new proposal is to support auto-negotiation between 10/100/1000Mbps
>> and 2.5Gbps . Auto-negotiation between 10, 100, 1000Mbps will use
>> in-band auto negotiation. Auto-negotiation between 10/100/1000Mbps and
>> 2.5Gbps will work as the following proposed flow, the stmmac driver reads
>> the PHY link status registers then identifies the negotiated speed.
>> Based on the speed stmmac driver will identify TSN lane registers from
>> FIA then send IPC command to the Power Management controller (PMC)
>> through PMC driver/API. PMC will act as a proxy to programs the
>> PLL registers.
>
> Have you considered using out of band for all link modes? You might
> end up with a cleaner architecture, and not need any phylink/phylib
> hacks.
>
> Andrew
Hi Andrew,
Thank you for your feedback.
I will study the feasibility of the out-of-band (OOB) approach.
next prev parent reply other threads:[~2023-08-10 9:52 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-04 8:45 [PATCH net-next v2 0/5] TSN auto negotiation between 1G and 2.5G Choong Yong Liang
2023-08-04 8:45 ` [PATCH net-next v2 1/5] platform/x86: intel_pmc_core: Add IPC mailbox accessor function and add SoC register access Choong Yong Liang
2023-08-07 11:02 ` Hans de Goede
2023-08-10 16:36 ` David E. Box
2023-08-04 8:45 ` [PATCH net-next v2 2/5] net: pcs: xpcs: combine C37 SGMII AN and 2500BASEX for Intel mGbE controller Choong Yong Liang
2023-08-04 8:45 ` [PATCH net-next v2 3/5] net: phy: update in-band AN mode when changing interface by PHY driver Choong Yong Liang
2023-08-04 9:02 ` Russell King (Oracle)
2023-08-10 9:23 ` Choong Yong Liang
2023-08-04 8:45 ` [PATCH net-next v2 4/5] net: stmmac: enable Intel mGbE 1G/2.5G auto-negotiation support Choong Yong Liang
2023-08-04 8:45 ` [PATCH net-next v2 5/5] stmmac: intel: Add 1G/2.5G auto-negotiation support for ADL-N Choong Yong Liang
2023-08-04 12:04 ` [PATCH net-next v2 0/5] TSN auto negotiation between 1G and 2.5G Andrew Lunn
2023-08-10 9:52 ` Choong Yong Liang [this message]
2023-09-21 12:25 ` Choong Yong Liang
2023-09-21 13:21 ` Andrew Lunn
2023-09-21 14:12 ` Russell King (Oracle)
2023-09-21 14:41 ` Andrew Lunn
2023-09-21 14:55 ` Russell King (Oracle)
2024-01-29 13:11 ` Choong Yong Liang
2023-09-21 13:39 ` Russell King (Oracle)
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