From patchwork Fri May 7 06:23:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kyle Tso X-Patchwork-Id: 12244025 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 5DBCDC433ED for ; Fri, 7 May 2021 06:23:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F3ED613ED for ; Fri, 7 May 2021 06:23:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233481AbhEGGYR (ORCPT ); Fri, 7 May 2021 02:24:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233360AbhEGGYO (ORCPT ); Fri, 7 May 2021 02:24:14 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F82BC061574 for ; Thu, 6 May 2021 23:23:14 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id v12-20020a25848c0000b02904f30b36aebfso9002984ybk.1 for ; Thu, 06 May 2021 23:23:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=057HsphvG01JlzoVdz0KlQlwLZqc+KcyJXEoUPEQFTE=; b=nvDWwzEJCBU+I9nYLyFo/kzudwIXUS2orHoCti1uMt7DSsYK/hBoT1KPIdNWCQUJ8A wARLJT4E9KKBXEdLqLDsFa62siOdFVkMrBr/7j4Gd1yhxNiv/IQB45lTK7J3ZPZZT+W/ Qp6gaDp6UBH5K/AF4gFwcZxRutE2mUT0q0/ikdbrJqPq4GpxXMjf/fybxeH/lCIyuxRK 6PYliEgU0G7CobalK5XlzYvn6bwsqtHUCE6MIOh3/HlvbzAcJ1bpwqABPYX7bx9uUSWc 4HlgWmJpSdX82YjazbBp1Iz0tLtxiHIOaUKLG68Ya97kjiVlWHYHl7T3y5sAhCa+hEt9 afvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=057HsphvG01JlzoVdz0KlQlwLZqc+KcyJXEoUPEQFTE=; b=ZYyKBLbpJq1pECdM/aXoKnNYqe6kCJTE+xH25mPphAq2MkVkUL2gJC1F3OJfM1aDyQ TqvI2CoY6bF1EjpbBXbf5Zjaub5Ke1/5zMW2AhQ5bGf6X6gzKfb9z/Q0g5SQ41lFvqSi Cuy9PIpduv20HJwDr+hEf/5Qp9qk9/OBG3HAKoMModBo59RMM4VHlu4Yrfv1docR6sH1 9tQ53Hm+QsoxI6aAQs6YcoIiF/4MnjqVhZGDTNeeLG9dIUKCex/AAZBfWeZlhzxmi54g 9oC6XD3H+LuwAIWaMqZoEgJ5lADdHkf1CnUfdKb7IUHjxKOVunt3kWZ5jCijSymfoLC/ BKPA== X-Gm-Message-State: AOAM532zJLQWIzmPVmoR7z3gWsAp5bJoW+tDvXTNpUZNjgr4zXO0O90i YquXhvGqlY+64doKUsQItpE7mC991Jx7 X-Google-Smtp-Source: ABdhPJxD3kUy1DBMlXwR59N2/HsFKNIHErwdUviHx3DuQUW+LOAK9E4P/3pRMtT+b8sl5Q1OFRSANl3Pqi7X X-Received: from kyletso.ntc.corp.google.com ([2401:fa00:fc:202:9a5c:8de0:4c79:ba52]) (user=kyletso job=sendgmr) by 2002:a25:bb08:: with SMTP id z8mr11153246ybg.188.1620368593913; Thu, 06 May 2021 23:23:13 -0700 (PDT) Date: Fri, 7 May 2021 14:23:00 +0800 In-Reply-To: <20210507062300.1945009-1-kyletso@google.com> Message-Id: <20210507062300.1945009-3-kyletso@google.com> Mime-Version: 1.0 References: <20210507062300.1945009-1-kyletso@google.com> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog Subject: [PATCH v3 2/2] usb: typec: tcpm: Fix wrong handling for Not_Supported in VDM AMS From: Kyle Tso To: linux@roeck-us.net, heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org Cc: badhri@google.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kyle Tso Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Not_Supported Message is acceptable in VDM AMS. Redirect the VDM state machine to VDM_STATE_DONE when receiving Not_Supported and finish the VDM AMS. Also, after the loop in vdm_state_machine_work, add more conditions of VDM states to clear the vdm_sm_running flag because those are all stopping states when leaving the loop. In addition, finish the VDM AMS if the port partner responds BUSY. Fixes: 8dea75e11380 ("usb: typec: tcpm: Protocol Error handling") Fixes: 8d3a0578ad1a ("usb: typec: tcpm: Respond Wait if VDM state machine is running") Signed-off-by: Kyle Tso Reviewed-by: Guenter Roeck Acked-by: Heikki Krogerus --- Changes since v2: - no changes drivers/usb/typec/tcpm/tcpm.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 07a449f0e8fa..bf97db232f09 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -1897,7 +1897,6 @@ static void vdm_run_state_machine(struct tcpm_port *port) if (res < 0) { port->vdm_state = VDM_STATE_ERR_BUSY; - port->vdm_sm_running = false; return; } } @@ -1913,6 +1912,7 @@ static void vdm_run_state_machine(struct tcpm_port *port) port->vdo_data[0] = port->vdo_retry; port->vdo_count = 1; port->vdm_state = VDM_STATE_READY; + tcpm_ams_finish(port); break; case VDM_STATE_BUSY: port->vdm_state = VDM_STATE_ERR_TMOUT; @@ -1978,7 +1978,7 @@ static void vdm_state_machine_work(struct kthread_work *work) port->vdm_state != VDM_STATE_BUSY && port->vdm_state != VDM_STATE_SEND_MESSAGE); - if (port->vdm_state == VDM_STATE_ERR_TMOUT) + if (port->vdm_state < VDM_STATE_READY) port->vdm_sm_running = false; mutex_unlock(&port->lock); @@ -2569,6 +2569,16 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, port->sink_cap_done = true; tcpm_set_state(port, ready_state(port), 0); break; + case SRC_READY: + case SNK_READY: + if (port->vdm_state > VDM_STATE_READY) { + port->vdm_state = VDM_STATE_DONE; + if (tcpm_vdm_ams(port)) + tcpm_ams_finish(port); + mod_vdm_delayed_work(port, 0); + break; + } + fallthrough; default: tcpm_pd_handle_state(port, port->pwr_role == TYPEC_SOURCE ?