linux-kernel - Re: GNSS support for Qualcomm PCIe modem device

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Message-ID: <f0798724-d5dd-498b-89be-7d7521ac4930@gmail.com>
Date: Fri, 4 Apr 2025 00:47:01 +0300
From: Sergey Ryazanov <ryazanov.s.a@...il.com>
To: Muhammad Nuzaihan <zaihan@...ealasia.net>, Slark Xiao <slark_xiao@....com>
Cc: Loic Poulain <loic.poulain@...aro.org>, manivannan.sadhasivam@...aro.org,
 netdev@...r.kernel.org, Qiang Yu <quic_qianyu@...cinc.com>,
 johan@...nel.org, mhi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: GNSS support for Qualcomm PCIe modem device

Hi Slark, Zaihan,

Zaihn, congratulations with the progress, curious to see the result.

Slark, thank you for remind me. It's a good moment. Lets see how we can 
prototype it. Will try to do it this weekend and send some RFC next week.

On 03.04.2025 11:42, Muhammad Nuzaihan wrote:
> Hi Slark,
> 
> I just implemented it in the wwan subsystem since it works for me (even 
> without flow control). I wanted to port it to use GPS subsystem, 
> however, debugging in GPS subsystem is too troublesome, especially when 
> the driver crashes.
> 
> Unless i can have some VM with direct access to the Quectel hardware so 
> i don't need to keep rebooting my machine if it crashes.
> 
> For now, i am getting GNSS/NMEA data from Quectel with MHI wwan 
> modifications.
> 
> Regards,
> Zaihan
> 
> 
> On Thu, Apr 3 2025 at 04:02:01 PM +0800, Muhammad Nuzaihan 
> <zaihan@...ealasia.net> wrote:
>> Hi Slark,
>>
>> I just implemented it in the wwan subsystem since it works for me 
>> (even without flow control). I wanted to port it to use GPS subsystem, 
>> however, debugging in GPS subsystem is too troublesome, especially 
>> when the driver crashes.
>>
>> Unless i can have some VM with direct access to the Quectel hardware 
>> so i don't need to keep rebooting my machine if it crashes.
>>
>> For now, i am getting GNSS/NMEA data from Quectel with MHI wwan 
>> modifications.
>>
>> Regards,
>> Zaihan
>>
>> On Thu, Apr 3 2025 at 02:06:52 PM +0800, Slark Xiao 
>> <slark_xiao@....com> wrote:
>>>
>>> Hi Sergey, Muhammad,
>>> This is Slark. We have a discussion about the feature of GNSS/NMEA 
>>> over QC PCIe modem
>>> device since 2024/12.May I know if we have any progress on this feature?
>>>
>>> It's really a common requirement for modem device since we have 
>>> received some complaint
>>> from our customer. Please help provide your advice.

--
Sergey