linux-kernel - Re:Re: [PATCH] [v2,1/1] This aims to support Foxconn SDX55

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Message-ID: <3068a773.9a1.17b380a5d58.Coremail.slark_xiao@163.com>
Date:   Thu, 12 Aug 2021 09:46:48 +0800 (CST)
From:   "Slark Xiao" <slark_xiao@....com>
To:     "Sergei Shtylyov" <sergei.shtylyov@...il.com>
Cc:     johan@...nel.org, gregkh@...uxfoundation.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re:Re: [PATCH] [v2,1/1] This aims to support Foxconn SDX55

















At 2021-08-11 18:58:09, "Sergei Shtylyov" <sergei.shtylyov@...il.com> wrote:
>Hello!
>
>On 11.08.2021 11:56, Slark Xiao wrote:
>
>> Foxconn SDX55 T77W175 device is working in PCIe mode normally.
>> You can find it in drivers/bus/mhi/pci_geneirc.c file.
>
>    pci_generic? :-)
>
>> But in some scenario, we need to capture the memory dump once it crashed.
>> So a diag port driver is needed.
>> 
>> Signed-off-by: Slark Xiao <slark_xiao@....com>
>[...]
>
>MBR, Sergei

Hi Sergei,
   Yes, I didn't mix them up. Our product supports 3 modes: PCIE only, USB only, and PCIE+USB.
   Normally, it would be PCIE mode. When we want to reproduce some crash issue, we will switch it from PCIE mode to PCIE+USB mode.
  In this scenario, the USB port is used for capturing memory dump as our tool is designed based on Qualcomm USB Sahara protocol.

Thanks.