On 10/07/15 04:20, Stas Sergeev wrote:
> 10.07.2015 11:46, Sebastien Rannou пишет:
>> On Fri, 10 Jul 2015, Stas Sergeev wrote:
>>
>>> 10.07.2015 00:15, Florian Fainelli пишет:
>>>> Then, if the in-band status indication is not reliable (which really
>>>> should be completely understood),
>>> Agree!
>>> But this is not something I can help with.
>>> Sebastien Rannou reports the problem, please ask him whatever
>>> you see fits to get a better understanding of a problem.
>>> The fact that his HW does not generate the inband status, is
>>> _my own guess_.
>>
>> Yes, I confirm that my HW does not generate an in-band status. AFAIK, it's
>> a PHY that aggregates 4xSGMIIs to 1xQSGMII ; the MAC side of the PHY (with
>> inband status) is connected to the switch through QSGMII, and in this context
>> we are on the media side of the PHY.
> Hmm, interesting.
> So if I parse the above correctly, you have something like 88E1340S set
> up into a mode when SGMII is used as media interface and QSGMII as system
> interface (terms are from datasheet page 5), then you connect the media
> interface to armada-xp and system interface to the switch.
>
> I wonder if it is the right thing to do.
> AFAIK you could as well set up armada-xp into QSGMII mode and connect
> that to switch. The driver would then disable the use of inband status
> and everything would be fine.
> Either way, your use-case proves that only DT can decide the use of an
> inband status.
I do not think there is any debate around the need for a property that
defines whether in-band-status is both reliable and usable, the debate
is about *where* to put it.
I still think this does not belong in the fixed-link property, but now
that you have explained a bit more in the other patch what your
understanding of "fixed-link" is, I can see the confusion.
Instead of having a link = "auto", property, how about just something
like this:
fixed-link {
speed = <1000>;
full-duplex;
use-in-band-status;
};
or event this:
fixed-link {
use-in-band-status;
};
If you parse the 'use-in-band-status' which means that it is reliable
information, then you can override whatever was defined in the DT under
the 'fixed-link' property?
--
Florian
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
