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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A52E4C33CAC for ; Mon, 3 Feb 2020 13:28:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7984C20721 for ; Mon, 3 Feb 2020 13:28:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727646AbgBCN2M (ORCPT ); Mon, 3 Feb 2020 08:28:12 -0500 Received: from mga18.intel.com ([134.134.136.126]:23552 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727606AbgBCN2M (ORCPT ); Mon, 3 Feb 2020 08:28:12 -0500 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Feb 2020 05:28:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,398,1574150400"; d="scan'208";a="337184723" Received: from kuha.fi.intel.com ([10.237.72.53]) by fmsmga001.fm.intel.com with SMTP; 03 Feb 2020 05:28:09 -0800 Received: by kuha.fi.intel.com (sSMTP sendmail emulation); Mon, 03 Feb 2020 15:28:08 +0200 Date: Mon, 3 Feb 2020 15:28:08 +0200 From: Heikki Krogerus To: "Shah, Nehal-bakulchandra" Cc: ajayg@nvidia.com, linux-usb@vger.kernel.org Subject: Re: UCSI:CCG: AMD Platform Message-ID: <20200203132808.GA29050@kuha.fi.intel.com> References: <0fa0fc36-ce51-046a-32ae-9dbb7452c1c4@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0fa0fc36-ce51-046a-32ae-9dbb7452c1c4@amd.com> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Hi, On Mon, Feb 03, 2020 at 10:52:52AM +0530, Shah, Nehal-bakulchandra wrote: > Currently i am working on enabling UCSI support > for CCGx based controller on AMD GPU Cards. > > Now i am observing the issue reported here when > i unplug the cable. > > https://bugzilla.redhat.com/show_bug.cgi?id=1762031 > > Also would like to know is there any way we can > get user level notifications for UCSI? If you want to see the actual UCSI notification in user space, then that is not possible, but the driver does produce trace output, and I would actually like to see what we got there. You need debugfs to be mounted. Then try the following: # Unload all UCSI modules modprobe -r ucsi_acpi # At this point you should plug-in the problematic device # Reload the UCSI core module modprobe typec_ucsi # Enable UCSI tracing echo 1 > /sys/kernel/debug/tracing/events/ucsi/enable # Now reload the ACPI glue driver modprobe ucsi_acpi # Unplug the problematic device so that you see the error # Finally dump the trace output cat /sys/kernel/debug/tracing/trace So if that works, please send the trace output to me. Thanks, -- heikki