From patchwork Wed May 12 14:43:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 436780 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 D6783C43600 for ; Wed, 12 May 2021 16:02:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BF0D861E28 for ; Wed, 12 May 2021 16:02:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235502AbhELQDI (ORCPT ); Wed, 12 May 2021 12:03:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:37078 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238211AbhELP5c (ORCPT ); Wed, 12 May 2021 11:57:32 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1F65961946; Wed, 12 May 2021 15:30:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620833460; bh=kF7IKPrB1ZmisWWIppxEjmAVxp7etSL5QF6Nm/CBarY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1tBoVqMUFf8sj60KhR5mGzqy5qSJvQNUNgqlvl4oH4IOwnMmwHM+BH5tONNxjUa3q LQmN/+KKk7d0BvcRUf8B3E5gRS82OIGt5rKhBZOp9H8knkmFnHSzRCfPErnz9zcxY/ fAZmCLYV9gAKnf5ROFUU3V8ZAqoIzs3y/Bryhizc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Guenter Roeck , Heikki Krogerus , Badhri Jagan Sridharan , Sasha Levin Subject: [PATCH 5.11 159/601] usb: typec: tcpm: Handle vbus shutoff when in source mode Date: Wed, 12 May 2021 16:43:56 +0200 Message-Id: <20210512144833.071054384@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Badhri Jagan Sridharan [ Upstream commit 7771bcc7f5a727d6e3f7a80b0b075a75cb664fb2 ] While in source mode, vbus could be shutoff by protections circuits. TCPM does not move back to toggling state to re-initiate connection. Fix this by moving to SRC_UNATTACHED state when vbus shuts off while in source mode. Reviewed-by: Guenter Roeck Reviewed-by: Heikki Krogerus Signed-off-by: Badhri Jagan Sridharan Link: https://lore.kernel.org/r/20210201100212.49863-1-badhri@google.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/typec/tcpm/tcpm.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index a443094090f1..c2bdfeb60e4f 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -4287,6 +4287,17 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port) /* Do nothing, waiting for sink detection */ break; + case SRC_STARTUP: + case SRC_SEND_CAPABILITIES: + case SRC_SEND_CAPABILITIES_TIMEOUT: + case SRC_NEGOTIATE_CAPABILITIES: + case SRC_TRANSITION_SUPPLY: + case SRC_READY: + case SRC_WAIT_NEW_CAPABILITIES: + /* Force to unattached state to re-initiate connection */ + tcpm_set_state(port, SRC_UNATTACHED, 0); + break; + case PORT_RESET: /* * State set back to default mode once the timer completes.