May be we should also explore how to use platform feature xHCI DbC tty to get kernel logs
From: Celadon [mailto:email@example.com] On Behalf Of Tapani Pälli
Sent: Friday, May 10, 2019 5:28 PM
To: Tan, Ming <ming.tan(a)intel.com>; celadon(a)lists.01.org
Subject: Re: [01.org
Celadon] Use USB serial port to get log
Thanks a lot for enabling this!
On 5/9/19 9:08 AM, Tan, Ming wrote:
> Dear all:
> In general, we use serial port log to debug some boot issue.
> But if the device has not native serial port, such as APL NUC, then
> we have to use the USB serial port convertor.
> However, you can get log only after the kernel load the USB serial
> port convertor driver. If the kernel crash before load the driver,
> then you have to check log in screen.
> In the cel_apl lunch target, default use ttyUSB0, and the other
> lunch targets are use ttyS0.
> Now support FTDI or PL2303 chip based USB serial port convertor.
> You can enable others as you needed.
> Some USB serial convertor:
> 1. FTDI: https://item.jd.com/10415462066.html
> 2. PL2303: https://item.jd.com/1309051.html
> BR/Tan Ming.
> Software Engineer, IAGS/SSP/Android
> Mobile: +86 13651977713.
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