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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 949BAC433E6 for ; Fri, 5 Feb 2021 03:36:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5429764FBE for ; Fri, 5 Feb 2021 03:36:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230411AbhBEDgB (ORCPT ); Thu, 4 Feb 2021 22:36:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230315AbhBEDfs (ORCPT ); Thu, 4 Feb 2021 22:35:48 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91007C06121D for ; Thu, 4 Feb 2021 19:34:37 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id 203so5523203ybz.2 for ; Thu, 04 Feb 2021 19:34:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=xuvEAsN0KJISBabHE8c3n6+McmR97NEy/0CVQ5vlPQ4=; b=CsqviQQyFwW4Z1uvUOPhG27GfeCYOnKmmQ+WjrzLmHuIlkt8EKMKztqNSwPe+vv6zO +A3qS4SD7u8QrVSM8QX9RgA14jdG1bzwFr7+z+hzCn/kK3KNIiz2J4F6rV+RSsi0ycWO mG7i1uLBXEE9C9Q75sJWR7UFYLKjLcuMbt718L6UR0QS85F0YjA4Nl+BNPlDUbPyCz9H E6rVYOyTqjG3ZxhpJrEstSSrqBNRvOzA1vmbeqbzwTn7K5Bz3NZUzwv9auojzDeK8Ivo RSbG7j0LxhllhSWSmbBBxBLRJX2W4X/kCF7l34rgbpkJprlyXVqtqaQ7hTOEUo/EiPfo lFkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=xuvEAsN0KJISBabHE8c3n6+McmR97NEy/0CVQ5vlPQ4=; b=M5gW6Q0MVxdP2uf6sGFHxkWtFXXHaJ6Eb3LXGnphLbf1v/kWp7NUBcmEwFFxB2LEeW b3cim9oO7VNi7CNhta0i97+BLDCyIvdqyWAczL4Oq+E5YML6jGijG8eyzhtYh+E/9TPf XZU8isxxVz1woIjwBvMvlBwVuvFNDAXsdvsCq1jkRG1ILHXzRcNWiUR9vJDMFFfiiZK1 D5gPTWge9HqlBnGROe1CtiKAAfIZlkYEamSRtLLoal4Rk9J+ZxZ468XgZCaaAqEoEHTv 5eOow692PW5V38mkB6ibDIfy60d6wEaUOr3LJznO9Xxfge1mAXv28P6SlFprBlg/Q7B2 H7eQ== X-Gm-Message-State: AOAM532tAOjB91OHxuGvqBfrt513dcgk3GKYNMWKYQlny16YZRcfyMIN kdYSXfKU741+Kd+fMlQ9Ljh2gCsUQMPV X-Google-Smtp-Source: ABdhPJzULV/+zRPxBov/nxkHQO0y5QiaXlpjbXsH6n3H1RK027a128DtuYyTVSd04vY/mplHhOmBSy2AolbQ Sender: "kyletso via sendgmr" X-Received: from kyletso.ntc.corp.google.com ([2401:fa00:fc:202:dd94:c753:a81d:c855]) (user=kyletso job=sendgmr) by 2002:a25:d186:: with SMTP id i128mr3646941ybg.46.1612496076879; Thu, 04 Feb 2021 19:34:36 -0800 (PST) Date: Fri, 5 Feb 2021 11:34:12 +0800 In-Reply-To: <20210205033415.3320439-1-kyletso@google.com> Message-Id: <20210205033415.3320439-5-kyletso@google.com> Mime-Version: 1.0 References: <20210205033415.3320439-1-kyletso@google.com> X-Mailer: git-send-email 2.30.0.365.g02bc693789-goog Subject: [PATCH v6 4/7] usb: typec: ucsi: Determine common SVDM Version From: Kyle Tso To: linux@roeck-us.net, heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org, hdegoede@redhat.com, robh+dt@kernel.org Cc: badhri@google.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Kyle Tso Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch implements the following requirement in the Spec. PD Spec Revision 3.0 Version 2.0 + ECNs 2020-12-10 6.4.4.2.3 Structured VDM Version "The Structured VDM Version field of the Discover Identity Command sent and received during VDM discovery Shall be used to determine the lowest common Structured VDM Version supported by the Port Partners or Cable Plug and Shall continue to operate using this Specification Revision until they are Detached." Signed-off-by: Kyle Tso --- Changes since v5: - follow the changes of "usb: typec: Manage SVDM version" - remove the "reset to default". Now the default SVDM version will be set when calling to typec_register_partner drivers/usb/typec/ucsi/displayport.c | 32 +++++++++++++++++++++++++--- drivers/usb/typec/ucsi/ucsi.c | 1 + 2 files changed, 30 insertions(+), 3 deletions(-) diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/displayport.c index 1d387bddefb9..73cd5bf35047 100644 --- a/drivers/usb/typec/ucsi/displayport.c +++ b/drivers/usb/typec/ucsi/displayport.c @@ -49,6 +49,7 @@ static int ucsi_displayport_enter(struct typec_altmode *alt, u32 *vdo) { struct ucsi_dp *dp = typec_altmode_get_drvdata(alt); struct ucsi *ucsi = dp->con->ucsi; + int svdm_version; u64 command; u8 cur = 0; int ret; @@ -83,7 +84,13 @@ static int ucsi_displayport_enter(struct typec_altmode *alt, u32 *vdo) * mode, and letting the alt mode driver continue. */ - dp->header = VDO(USB_TYPEC_DP_SID, 1, SVDM_VER_1_0, CMD_ENTER_MODE); + svdm_version = typec_altmode_get_svdm_version(alt); + if (svdm_version < 0) { + ret = svdm_version; + goto err_unlock; + } + + dp->header = VDO(USB_TYPEC_DP_SID, 1, svdm_version, CMD_ENTER_MODE); dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE); dp->header |= VDO_CMDT(CMDT_RSP_ACK); @@ -101,6 +108,7 @@ static int ucsi_displayport_enter(struct typec_altmode *alt, u32 *vdo) static int ucsi_displayport_exit(struct typec_altmode *alt) { struct ucsi_dp *dp = typec_altmode_get_drvdata(alt); + int svdm_version; u64 command; int ret = 0; @@ -120,7 +128,13 @@ static int ucsi_displayport_exit(struct typec_altmode *alt) if (ret < 0) goto out_unlock; - dp->header = VDO(USB_TYPEC_DP_SID, 1, SVDM_VER_1_0, CMD_EXIT_MODE); + svdm_version = typec_altmode_get_svdm_version(alt); + if (svdm_version < 0) { + ret = svdm_version; + goto out_unlock; + } + + dp->header = VDO(USB_TYPEC_DP_SID, 1, svdm_version, CMD_EXIT_MODE); dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE); dp->header |= VDO_CMDT(CMDT_RSP_ACK); @@ -186,6 +200,7 @@ static int ucsi_displayport_vdm(struct typec_altmode *alt, struct ucsi_dp *dp = typec_altmode_get_drvdata(alt); int cmd_type = PD_VDO_CMDT(header); int cmd = PD_VDO_CMD(header); + int svdm_version; mutex_lock(&dp->con->lock); @@ -198,9 +213,20 @@ static int ucsi_displayport_vdm(struct typec_altmode *alt, return -EOPNOTSUPP; } + svdm_version = typec_altmode_get_svdm_version(alt); + if (svdm_version < 0) { + mutex_unlock(&dp->con->lock); + return svdm_version; + } + switch (cmd_type) { case CMDT_INIT: - dp->header = VDO(USB_TYPEC_DP_SID, 1, SVDM_VER_1_0, cmd); + if (PD_VDO_SVDM_VER(header) < svdm_version) { + typec_partner_set_svdm_version(dp->con->partner, PD_VDO_SVDM_VER(header)); + svdm_version = PD_VDO_SVDM_VER(header); + } + + dp->header = VDO(USB_TYPEC_DP_SID, 1, svdm_version, cmd); dp->header |= VDO_OPOS(USB_TYPEC_DP_MODE); switch (cmd) { diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index ca3f4194ad90..244270755ae6 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -1052,6 +1052,7 @@ static int ucsi_register_port(struct ucsi *ucsi, int index) cap->revision = ucsi->cap.typec_version; cap->pd_revision = ucsi->cap.pd_version; + cap->svdm_version = SVDM_VER_2_0; cap->prefer_role = TYPEC_NO_PREFERRED_ROLE; if (con->cap.op_mode & UCSI_CONCAP_OPMODE_AUDIO_ACCESSORY) -- 2.30.0.365.g02bc693789-goog