From patchwork Wed Aug 19 11:58:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 11723803 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5060A14E3 for ; Wed, 19 Aug 2020 12:03:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E4872078D for ; Wed, 19 Aug 2020 12:03:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728352AbgHSMCo (ORCPT ); Wed, 19 Aug 2020 08:02:44 -0400 Received: from mga05.intel.com ([192.55.52.43]:49568 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728493AbgHSL7W (ORCPT ); Wed, 19 Aug 2020 07:59:22 -0400 IronPort-SDR: SPbFxX9AevWWWeTISxfFlxTReWpzO40IHQhbJIzQDDi+NW2/TUqtCo8O5dnh+aUeB8Dvsai+HL WXH4p3UPoBVA== X-IronPort-AV: E=McAfee;i="6000,8403,9717"; a="239922672" X-IronPort-AV: E=Sophos;i="5.76,331,1592895600"; d="scan'208";a="239922672" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Aug 2020 04:59:14 -0700 IronPort-SDR: knPXZSxeBqB46vVg835SwDONqzistVX9LP+zgOjtUm6K3bTUQD/cl/vtWwJ2EiM92V8d9ELxy/ czDMRiZ6stcA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,331,1592895600"; d="scan'208";a="329310762" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga002.fm.intel.com with ESMTP; 19 Aug 2020 04:59:11 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id B38634B3; Wed, 19 Aug 2020 14:59:06 +0300 (EEST) From: Mika Westerberg To: linux-usb@vger.kernel.org Cc: Michael Jamet , Yehezkel Bernat , Mika Westerberg , Andreas Noever , Rajmohan Mani , Dana Alkattan , Lukas Wunner , "Rafael J . Wysocki" , Bjorn Helgaas , Len Brown , Greg Kroah-Hartman , linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 10/19] thunderbolt: Do not change default USB4 router notification timeout Date: Wed, 19 Aug 2020 14:58:56 +0300 Message-Id: <20200819115905.59834-11-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200819115905.59834-1-mika.westerberg@linux.intel.com> References: <20200819115905.59834-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Some early stage USB4 devices do not like that any of the enumerating router config space fields (ROUTER_CS_1 - ROUTER_CS_4) are written after the initial enumeration for example when entering sleep states. The default timeout by the USB4 spec is 10 ms which should be fine for the driver to handle. For this reason do not change the notification timeout from the default 10 ms for USB4 routers. Signed-off-by: Mika Westerberg --- drivers/thunderbolt/switch.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index de186d6ed166..e1ba8215144b 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1269,7 +1269,7 @@ static int tb_plug_events_active(struct tb_switch *sw, bool active) u32 data; int res; - if (tb_switch_is_icm(sw)) + if (tb_switch_is_icm(sw) || tb_switch_is_usb4(sw)) return 0; sw->config.plug_events_delay = 0xff; @@ -1277,10 +1277,6 @@ static int tb_plug_events_active(struct tb_switch *sw, bool active) if (res) return res; - /* Plug events are always enabled in USB4 */ - if (tb_switch_is_usb4(sw)) - return 0; - res = tb_sw_read(sw, &data, TB_CFG_SWITCH, sw->cap_plug_events + 1, 1); if (res) return res;