netdev - Re: [PATCH v3] net: phy: add Maxlinear GPY115/21x/24x driver

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Date:   Mon, 21 Jun 2021 13:07:34 +0000
From:   Liang Xu <lxu@...linear.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     Florian Fainelli <f.fainelli@...il.com>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "vee.khee.wong@...ux.intel.com" <vee.khee.wong@...ux.intel.com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        Hauke Mehrtens <hmehrtens@...linear.com>,
        Thomas Mohren <tmohren@...linear.com>
Subject: Re: [PATCH v3] net: phy: add Maxlinear GPY115/21x/24x driver

On 21/6/2021 8:48 pm, Andrew Lunn wrote:
> This email was sent from outside of MaxLinear.
>
>
> On Mon, Jun 21, 2021 at 05:05:06AM +0000, Liang Xu wrote:
>> On 21/6/2021 10:30 am, Andrew Lunn wrote:
>>> This email was sent from outside of MaxLinear.
>>>
>>>
>>> On Fri, Jun 18, 2021 at 03:36:35PM +0000, Liang Xu wrote:
>>>> On 18/6/2021 10:01 pm, Andrew Lunn wrote:
>>>>> This email was sent from outside of MaxLinear.
>>>>>
>>>>>
>>>>>> Net-next:
>>>>>>
>>>>>> int genphy_loopback(struct phy_device *phydev, bool enable)
>>>>>> {
>>>>>>         if (enable) {
>>>>>>             u16 val, ctl = BMCR_LOOPBACK;
>>>>>>             int ret;
>>>>>>
>>>>>>             if (phydev->speed == SPEED_1000)
>>>>>>                 ctl |= BMCR_SPEED1000;
>>>>>>             else if (phydev->speed == SPEED_100)
>>>>>>                 ctl |= BMCR_SPEED100;
>>>> The problem happens in the speed change no matter it's forced or
>>>> auto-neg in our device.
>>> You say speed change. So do you just need to add support for 10Mbps,
>>> so there is no speed change? Or are you saying phydev->speed does not
>>> match the actual speed?
>>>
>>>         Andrew
>>>
>> We have 2.5G link speed, so mismatch happens.
> Ah, yes.  Sorry.
>
> Please implement it in your driver.
>
>         Andrew
>
Sure. Thank you for advice.


Regards,

Xu Liang