Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938771AbcJXJ5Y (ORCPT ); Mon, 24 Oct 2016 05:57:24 -0400 Received: from mga05.intel.com ([192.55.52.43]:31507 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755264AbcJXJ5X (ORCPT ); Mon, 24 Oct 2016 05:57:23 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,541,1473145200"; d="scan'208";a="893254262" Subject: Re: [PATCH v2 RESEND] drivers/usb: Skip auto handoff for TI and RENESAS usb controllers To: Babu Moger , mathias.nyman@intel.com, gregkh@linuxfoundation.org References: <1477088705-202225-1-git-send-email-babu.moger@oracle.com> Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Yoshihiro Shimoda From: Mathias Nyman Message-ID: <580DDB16.5030906@linux.intel.com> Date: Mon, 24 Oct 2016 12:57:42 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <1477088705-202225-1-git-send-email-babu.moger@oracle.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 595 Lines: 16 On 22.10.2016 01:25, Babu Moger wrote: > Never seen XHCI auto handoff working on TI and RENESAS cards. > Eventually, we force handoff. This code forces the handoff > unconditionally. It saves 5 seconds boot time for each card. > > Signed-off-by: Babu Moger Do the Renesas and TI controllers still advertise the extended capability for the handoff? (XHCI_EXT_CAPS_LEGACY) Is this some known issue with these vendors controllers? Is there some documentation about this, errata or anything? Adding Yoshihiro Shimoda, he might know about the Renesas controller. -Mathias