From patchwork Mon Sep 7 14:21:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 258630 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 81C6FC43461 for ; Mon, 7 Sep 2020 16:31:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50A37207DE for ; Mon, 7 Sep 2020 16:31:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730381AbgIGQby (ORCPT ); Mon, 7 Sep 2020 12:31:54 -0400 Received: from mga09.intel.com ([134.134.136.24]:34570 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729793AbgIGOWF (ORCPT ); Mon, 7 Sep 2020 10:22:05 -0400 IronPort-SDR: vIOtwWF8K5+Ue+5c0HPElYbJwgWJZwX1sKlAXSbYct8WB3tWCsk9zT0/FKorBf21uhb/vLDHzi AyOqnY6m1AcA== X-IronPort-AV: E=McAfee;i="6000,8403,9736"; a="158987045" X-IronPort-AV: E=Sophos;i="5.76,402,1592895600"; d="scan'208";a="158987045" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Sep 2020 07:21:57 -0700 IronPort-SDR: J/JYFS3oFVQrkWg9Q3rECnWSXHQBJlmIpzYiV9dHCa38Opyg7lRHU9NAZEZEgtmS2HGPQzz+GG d/bmYMnJTtXQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,402,1592895600"; d="scan'208";a="406850918" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 07 Sep 2020 07:21:55 -0700 From: Heikki Krogerus To: Greg Kroah-Hartman Cc: "Mani, Rajmohan" , Utkarsh Patel , linux-usb@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 1/2] usb: typec: intel_pmc_mux: Do not configure Altmode HPD High Date: Mon, 7 Sep 2020 17:21:51 +0300 Message-Id: <20200907142152.35678-2-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200907142152.35678-1-heikki.krogerus@linux.intel.com> References: <20200907142152.35678-1-heikki.krogerus@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 From: Utkarsh Patel According to the PMC Type C Subsystem (TCSS) Mux programming guide rev 0.7, bit 14 is reserved in Alternate mode. In DP Alternate Mode state, if the HPD_STATE (bit 7) field in the status update command VDO is set to HPD_HIGH, HPD is configured via separate HPD mode request after configuring DP Alternate mode request. Configuring reserved bit may show unexpected behaviour. So do not configure them while issuing the Alternate Mode request. Fixes: 7990be48ef4d ("usb: typec: mux: intel: Handle alt mode HPD_HIGH") Cc: stable@vger.kernel.org Signed-off-by: Utkarsh Patel Signed-off-by: Heikki Krogerus --- drivers/usb/typec/mux/intel_pmc_mux.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c index e4021e13af40a..802d443b367c6 100644 --- a/drivers/usb/typec/mux/intel_pmc_mux.c +++ b/drivers/usb/typec/mux/intel_pmc_mux.c @@ -68,7 +68,6 @@ enum { #define PMC_USB_ALTMODE_DP_MODE_SHIFT 8 /* TBT specific Mode Data bits */ -#define PMC_USB_ALTMODE_HPD_HIGH BIT(14) #define PMC_USB_ALTMODE_TBT_TYPE BIT(17) #define PMC_USB_ALTMODE_CABLE_TYPE BIT(18) #define PMC_USB_ALTMODE_ACTIVE_LINK BIT(20) @@ -185,9 +184,6 @@ pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state) req.mode_data |= (state->mode - TYPEC_STATE_MODAL) << PMC_USB_ALTMODE_DP_MODE_SHIFT; - if (data->status & DP_STATUS_HPD_STATE) - req.mode_data |= PMC_USB_ALTMODE_HPD_HIGH; - ret = pmc_usb_command(port, (void *)&req, sizeof(req)); if (ret) return ret;