From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFA7BC433F5 for ; Mon, 24 Jan 2022 14:53:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238709AbiAXOx4 (ORCPT ); Mon, 24 Jan 2022 09:53:56 -0500 Received: from mga01.intel.com ([192.55.52.88]:63871 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231403AbiAXOxz (ORCPT ); Mon, 24 Jan 2022 09:53:55 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643036035; x=1674572035; h=to:cc:references:from:subject:message-id:date: mime-version:in-reply-to:content-transfer-encoding; bh=HsIRnM64QqAoEu0GEH2hXeq3tAM799zncK8DTVzxh58=; b=By3dSiN0tpelwrSV7D/j0O/mTJUaZLy3RIrBh5l656tcH+6/IlyqmTlJ KiDlp9mAmkartjqljfSDpPbbRfYHfVmclDOsEsNt/z2cw554VHAw4TQCy D9sHhp1JrIka+L3MjfV5Q/RMchDqjfusioZWbMscrCga2b2jbYf22EnNk ujEJGMwflAMZtrfhsQ7NP2mGswIJEYT8PjH/VJPpjk0gcIlny3UNiv1KQ R9IkjYjmj3nb8QCIMhpUErM+BGj1ZhwxUEFbLZtmTZWOcUpf8/kr93JAL U/pHp9sJVKNHDU52sG9bhSCZnddY01FT6q0tYFyTibyT4rKuxtwLFbHhe Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10236"; a="270496511" X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="270496511" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2022 06:53:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="562677786" Received: from mattu-haswell.fi.intel.com (HELO [10.237.72.199]) ([10.237.72.199]) by orsmga001.jf.intel.com with ESMTP; 24 Jan 2022 06:53:52 -0800 To: Peter Zijlstra Cc: Greg KH , Dave Hansen , Lu Baolu , x86@kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Chunfeng Yun References: <105f35d2-3c53-b550-bfb4-aa340d31128e@linux.intel.com> <88f466ff-a065-1e9a-4226-0abe2e71b686@linux.intel.com> <972a0e28-ad63-9766-88da-02743f80181b@intel.com> From: Mathias Nyman Subject: Re: earlyprintk=xdbc seems broken Message-ID: Date: Mon, 24 Jan 2022 16:55:22 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > [ 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? Thanks -Mathias