All of lore.kernel.org
 help / color / mirror / Atom feed
From: Peter Zijlstra <peterz@infradead.org>
To: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
	Dave Hansen <dave.hansen@intel.com>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	linux-usb@vger.kernel.org,
	Chunfeng Yun <chunfeng.yun@mediatek.com>
Subject: Re: earlyprintk=xdbc seems broken
Date: Mon, 24 Jan 2022 17:39:08 +0100	[thread overview]
Message-ID: <Ye7WLM+NyVQlEMXN@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <dfb311e3-1a83-31a2-3c82-fd982c0757f6@linux.intel.com>

On Mon, Jan 24, 2022 at 04:55:22PM +0200, Mathias Nyman wrote:
>  
> > [    0.000000] xhci_dbc:early_xdbc_parse_parameter: dbgp_num: 0
> > [    4.984106] xhci_dbc:xdbc_start: waiting for connection timed out, DCPORTSC:0xa0
> > [    9.946159] xhci_dbc:xdbc_start: waiting for connection timed out, DCPORTSC:0xa0
> > [    9.946163] xhci_dbc:early_xdbc_setup_hardware: failed to setup the connection to host
> >
> > [   12.818364] xhci_hcd 0000:00:0d.0: xHCI Host Controller
> > [   12.818373] xhci_hcd 0000:00:0d.0: new USB bus registered, assigned bus number 1
> > [   12.820360] xhci_hcd 0000:00:0d.0: xHCI Host Controller
> > [   12.820363] xhci_hcd 0000:00:0d.0: new USB bus registered, assigned bus number 2
> > [   12.821036] xhci_hcd 0000:00:14.0: xHCI Host Controller
> > [   12.821040] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 3
> > [   12.823451] xhci_hcd 0000:00:14.0: xHCI Host Controller
> > [   12.823453] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 4
> > [   17.115089] usb usb4-port4: Cannot enable. Maybe the USB cable is bad?
> > [   17.115163] usb usb4-port4: config error
> 
> Ok, I see it now.
> Your setup has two xhci controllers, earlypringk=dbc enables dbc on the first xhci
> it finds, which would be at 0000:00:0d.0.
> Your cable is connected to the second xhci host at 0000:00:14.0
> 
> does using "earlyprintk=xdbc1" work?

Very quick testing says it don't work.. but I'll try again later, need
to go cook dinner now.

  reply	other threads:[~2022-01-24 16:39 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-02 15:22 earlyprintk=xdbc seems broken Peter Zijlstra
2021-12-03  0:52 ` Lu Baolu
2021-12-03 14:31   ` Mathias Nyman
2021-12-03 15:22     ` Dave Hansen
2021-12-03 15:29       ` Greg KH
2021-12-17 11:01         ` Mathias Nyman
2021-12-17 13:55           ` Peter Zijlstra
2021-12-17 15:19             ` Greg KH
2021-12-20 14:40               ` Peter Zijlstra
2021-12-20 15:06                 ` Greg KH
2021-12-20 17:01                   ` Peter Zijlstra
2021-12-20 14:34             ` Mathias Nyman
2021-12-20 15:51               ` Peter Zijlstra
2021-12-21  9:40             ` Peter Zijlstra
2021-12-21  9:41               ` Peter Zijlstra
2022-01-14  8:47               ` Peter Zijlstra
2022-01-14 19:31                 ` Mathias Nyman
2022-01-15 16:06                   ` Peter Zijlstra
2022-01-24 14:55                     ` Mathias Nyman
2022-01-24 16:39                       ` Peter Zijlstra [this message]
2022-01-24 16:46                         ` Peter Zijlstra
2022-01-25  8:51                           ` Mathias Nyman
2022-01-25 10:47                             ` Peter Zijlstra
2022-01-25 10:54                               ` Peter Zijlstra
2022-01-25 12:45                       ` Peter Zijlstra
2022-01-25 13:09                         ` Sven Schnelle
2022-01-25 13:54                           ` Peter Zijlstra
2022-01-25 14:01                             ` Sven Schnelle
2022-01-25 17:13                               ` Mathias Nyman
2022-01-25 16:24                           ` Dave Hansen
2022-02-17  3:44                             ` Randy Dunlap
2022-01-25 19:39                         ` Rajaram R

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=Ye7WLM+NyVQlEMXN@hirez.programming.kicks-ass.net \
    --to=peterz@infradead.org \
    --cc=baolu.lu@linux.intel.com \
    --cc=chunfeng.yun@mediatek.com \
    --cc=dave.hansen@intel.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=mathias.nyman@linux.intel.com \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.