From patchwork Thu Dec 10 16:05:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 342520 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 AB0D8C433FE for ; Thu, 10 Dec 2020 16:28:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6BFAC23D6B for ; Thu, 10 Dec 2020 16:28:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387761AbgLJQZF (ORCPT ); Thu, 10 Dec 2020 11:25:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:34720 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389377AbgLJQFk (ORCPT ); Thu, 10 Dec 2020 11:05:40 -0500 From: Greg Kroah-Hartman Authentication-Results: mail.kernel.org; dkim=permerror (bad message/signature format) To: heikki.krogerus@linux.intel.com, linux@roeck-us.net Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kyle Tso , Badhri Jagan Sridharan , Will McVicker , Greg Kroah-Hartman Subject: [PATCH 4/5] USB: typec: tcpm: Add a 30ms room for tPSSourceOn in PR_SWAP Date: Thu, 10 Dec 2020 17:05:20 +0100 Message-Id: <20201210160521.3417426-5-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201210160521.3417426-1-gregkh@linuxfoundation.org> References: <20201210160521.3417426-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Kyle Tso TCPM state machine needs 20-25ms to enter the ErrorRecovery state after tPSSourceOn timer timeouts. Change the timer from max 480ms to 450ms to ensure that the timer complies with the Spec. In order to keep the flexibility for other usecases using tPSSourceOn, add another timer only for PR_SWAP. Cc: Guenter Roeck Cc: Heikki Krogerus Cc: Badhri Jagan Sridharan Signed-off-by: Kyle Tso Signed-off-by: Will McVicker Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm/tcpm.c | 2 +- include/linux/usb/pd.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index d51c45961893..5ed78194a1bd 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -3728,7 +3728,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, ERROR_RECOVERY, 0); break; } - tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_ON); + tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_ON_PRS); break; case PR_SWAP_SRC_SNK_SINK_ON: /* Set the vbus disconnect threshold for implicit contract */ diff --git a/include/linux/usb/pd.h b/include/linux/usb/pd.h index 63a66dd5d832..bb9a782e1411 100644 --- a/include/linux/usb/pd.h +++ b/include/linux/usb/pd.h @@ -466,6 +466,7 @@ static inline unsigned int rdo_max_power(u32 rdo) #define PD_T_DRP_SRC 30 #define PD_T_PS_SOURCE_OFF 920 #define PD_T_PS_SOURCE_ON 480 +#define PD_T_PS_SOURCE_ON_PRS 450 /* 390 - 480ms */ #define PD_T_PS_HARD_RESET 30 #define PD_T_SRC_RECOVER 760 #define PD_T_SRC_RECOVER_MAX 1000