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

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Message-Id: <W6W4US.MQDIW3EU4I8R2@unrealasia.net>
Date: Thu, 03 Apr 2025 16:42:32 +0800
From: Muhammad Nuzaihan <zaihan@...ealasia.net>
To: Slark Xiao <slark_xiao@....com>
Cc: Sergey Ryazanov <ryazanov.s.a@...il.com>, 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,

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.
>> 
>> 
>> Thank you in advance!
>>