linux-kernel - Re: [PATCH net-next] net: sfp: add quirk for OEM DFP-34X-2C2 GPON ONU SFP

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Date: Thu, 8 Feb 2024 18:21:54 +0100
From: Sergio Palumbo <palumbo.ser@...look.it>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: sfp: add quirk for OEM DFP-34X-2C2 GPON ONU
 SFP

Hi Russell,
GPON modules we are talking about are all ONT/ONU and all the ONT ONU 
are configured by OLT unless you have a modded firmware.
ODI DFP-34X-2C2 is an ONT/ONU.
https://hack-gpon.org/ont-huawei-ma5671a/
https://hack-gpon.org/ont-fs-com-gpon-onu-stick-with-mac/
https://hack-gpon.org/ont-odi-realtek-dfp-34x-2c2/

I think the discussion on LAN_SDS_MODE=1 or LAN_SDS_MODE=6, started by 
me is not part of the problem as the system after the quirk is working 
at 2500-X with both settings. My fault!
The problem for these kind of modules is simply that they are not 
showing up at 2500-X because EEPROM or Virtual EEPROM (in case of 
MA5671A) failure to provide the correct speed to the linux driver.

Huawei MA5671A and Fiberstone GPON-ONU-34-20BI require:
"sfp_quirk_2500basex" and "sfp_fixup_ignore_tx_fault" quirks
ODI DFP-34X-2C2
only require "sfp_quirk_2500basex"

Hope this may help.

Regards

Sergio Palumbo

Il 08/02/2024 17:28, Russell King (Oracle) ha scritto:
> On Thu, Feb 08, 2024 at 05:19:24PM +0100, Sergio Palumbo wrote:
>> Dear Russell,
>> I understand your point, but I think ODI DFP-34X-2C2 situation is quite
>> similar to:
>> FS GPON-INU-34-20BI
>> HUAWEI MA5671A
> MA5671A is configured by the OLT. The user can't configure it.
>