From: Liang Xu <lxu@maxlinear.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Florian Fainelli <f.fainelli@gmail.com>,
"hkallweit1@gmail.com" <hkallweit1@gmail.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"kuba@kernel.org" <kuba@kernel.org>,
"vee.khee.wong@linux.intel.com" <vee.khee.wong@linux.intel.com>,
"linux@armlinux.org.uk" <linux@armlinux.org.uk>,
Hauke Mehrtens <hmehrtens@maxlinear.com>,
Thomas Mohren <tmohren@maxlinear.com>
Subject: Re: [PATCH v3] net: phy: add Maxlinear GPY115/21x/24x driver
Date: Fri, 18 Jun 2021 09:17:20 +0000 [thread overview]
Message-ID: <334b52a6-30e8-0869-6ffb-52e9955235ff@maxlinear.com> (raw)
In-Reply-To: <9a838afe-83e7-b575-db49-f210022966d5@maxlinear.com>
On 7/6/2021 12:06 pm, Liang Xu wrote:
> On 5/6/2021 10:51 pm, Andrew Lunn wrote:
>> This email was sent from outside of MaxLinear.
>>
>>
>>>>>> This does not access vendor specific registers, should not this be part
>>>>>> of the standard genphy_read_abilities() or moved to a helper?
>>>>>>
>>>>> genphy_read_abilities does not cover 2.5G.
>>>>>
>>>>> genphy_c45_pma_read_abilities checks C45 ids and this check fail if
>>>>> is_c45 is not set.
>>>> You appear to of ignored my comment about this. Please add the helper
>>>> to the core as i suggested, and then use
>>>> genphy_c45_pma_read_abilities().
>>>>
>>>> Andrew
>>>>
>>> I'm new to upstream and do not know the process to change code in core.
>> Pretty much the same way you change code in a driver. Submit a path!
>>
>> Please put it into a separate patch, so making a patch series. Please
>> add some kernel doc style documentation, describing what the function
>> does. Look at other functions in phy_device.c for examples.
>>
>> Anybody can change core code. It just gets looked at closer, and need
>> to be generic.
>>
>> Andrew
>>
> Thank you. I will create 2 patches for the core modification and driver
> separately
>
> in next update.
>
Hi Andrew,
I need your advice regarding to our recent test in loopback.
My current implementation uses "genphy_loopback" to enable/disable
loopback mode.
And it has intermittent issue (traffic not loopbacked) during the test
with net-next.
There are difference in the implementation in net-next and Linux v5.12.
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;
if (phydev->duplex == DUPLEX_FULL)
ctl |= BMCR_FULLDPLX;
phy_modify(phydev, MII_BMCR, ~0, ctl);
ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
val & BMSR_LSTATUS,
5000, 500000, true);
if (ret)
return ret;
} else {
phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
phy_config_aneg(phydev);
}
return 0;
}
v5.12.11:
int genphy_loopback(struct phy_device *phydev, bool enable)
{
return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
enable ? BMCR_LOOPBACK : 0);
}
Not sure whether anyone else reported similar issue.
Should I use phy_modify to set the LOOPBACK bit only in my driver
implementation as force speed with loopback enable does not work in our
device?
Thanks & Regards,
Xu Liang
next prev parent reply other threads:[~2021-06-18 9:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-04 16:12 [PATCH v3] net: phy: add Maxlinear GPY115/21x/24x driver Xu Liang
2021-06-04 16:24 ` Florian Fainelli
2021-06-04 18:24 ` Liang Xu
2021-06-04 20:10 ` Andrew Lunn
2021-06-05 3:35 ` Liang Xu
2021-06-05 14:51 ` Andrew Lunn
2021-06-07 4:06 ` Liang Xu
2021-06-18 9:17 ` Liang Xu [this message]
2021-06-18 14:01 ` Andrew Lunn
2021-06-18 15:36 ` Liang Xu
2021-06-21 2:30 ` Andrew Lunn
2021-06-21 5:05 ` Liang Xu
2021-06-21 12:48 ` Andrew Lunn
2021-06-21 13:07 ` Liang Xu
2021-06-04 18:37 ` Liang Xu
2021-06-04 19:44 ` Martin Blumenstingl
2021-06-05 3:32 ` Liang Xu
2021-06-05 17:24 ` Andrew Lunn
2021-06-07 4:37 ` Liang Xu
2021-06-07 20:28 ` Martin Blumenstingl
[not found] ` <MWHPR19MB0077D01E4EAFA9FE521D83ECBD0D9@MWHPR19MB0077.namprd19.prod.outlook.com>
[not found] ` <766ab274-25ff-c9a2-1ed6-fe2aa44b4660@maxlinear.com>
2021-06-23 21:09 ` Martin Blumenstingl
2021-06-24 1:06 ` Andrew Lunn
2021-06-22 4:21 Ismail, Mohammad Athari
2021-06-22 13:16 ` Andrew Lunn
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