From patchwork Tue Feb 2 00:30:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 375788 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 E5518C433E0 for ; Tue, 2 Feb 2021 00:31:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A453464ED0 for ; Tue, 2 Feb 2021 00:31:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229927AbhBBAbr (ORCPT ); Mon, 1 Feb 2021 19:31:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229527AbhBBAbq (ORCPT ); Mon, 1 Feb 2021 19:31:46 -0500 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97342C061573 for ; Mon, 1 Feb 2021 16:31:06 -0800 (PST) Received: by mail-pg1-x549.google.com with SMTP id f16so12602389pgh.3 for ; Mon, 01 Feb 2021 16:31:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=hjpuSlb6P3bXjOUeqREpOYD2lH5I31G9zQvLZVeEB98=; b=qYrzgC9yxfnuj+YMkIfocI7w52BZSEvBnDaAEOBAfVC5+x/wSyKEU5mU5rw8/wMeC4 A6xbEr8L8qQuBIyvmZUVzScNftJxLt0iaddPgUIXH75Zlsdxoi6mSgoXrPQsrmcpdZv4 uSYoQeyKApWiaHtCFHmuGFKmg7RtrodUbqcD7TmrYe1zTLSygjRXWTMJkafSF5AWH/u2 xY3oC4stDPgxMX6yPukV/PsvzA6VpuIXpPdoMCqct8wlSqkdKFWP4pL9NOH8qt9ceGkG qO74br8AOXFaCaDlEpEOpmTt4atdHrnTNvMilPhuOfNLTk38tscX57QmMfvp5gHkqu6O N+bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=hjpuSlb6P3bXjOUeqREpOYD2lH5I31G9zQvLZVeEB98=; b=qTZfj8le6Hf3gQIqKOyTZodDJXgSyiFiDNwMnckIAiHjVz6GTQPJsgVnc14dTHLuLh BhR8DWQrJAQOLLLpwvCFdqCP42aAC+CxEtS2EKRfvwfFOqCo4fwmLZdQzqLziSZBw9+M LbsMHnmMEG3ymQl2ELnxWJeJ5sPfxe+dBM10n3onM75cX5GVcUMGx9oa0++h4KUjdS/n tr+wFbYWZvyUUcmNO/F4HawXtbS1zg/uPVSdjvTTcv24IlqqjfZ7StA2iW6Hz0RJKGB1 Sa9PRmOnKTiKIBQsUunGVEhvnmtvelBDsGh/k5EPSGE3JOQyEfUidMAuM3kZ3Rgt7ocd wiMQ== X-Gm-Message-State: AOAM533jFEoJE3CXQ144/V8DLll+qb7Bgl7vrGq7suWRG8MHr79VDfje 8tRxddLW1FDYCJ9hptnaav/7htviR1c= X-Google-Smtp-Source: ABdhPJy01DdtX3UOPJ2GfeB4NeGYSbgYQqGCgzTHV5yivS8c3jlPanGVvx3SWW5S2oNw01UfpxdFTpFyBxA= Sender: "badhri via sendgmr" X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:d56c:119f:44fb:5da4]) (user=badhri job=sendgmr) by 2002:a17:90a:df15:: with SMTP id gp21mr1338867pjb.63.1612225866129; Mon, 01 Feb 2021 16:31:06 -0800 (PST) Date: Mon, 1 Feb 2021 16:30:59 -0800 Message-Id: <20210202003101.221145-1-badhri@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.30.0.365.g02bc693789-goog Subject: [PATCH v2 1/3] usb: typec: tcpm: Add Callback to Usb Communication capable partner From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman , Kyle Tso Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Badhri Jagan Sridharan Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The USB Communications Capable bit indicates if port partner is capable of communication over the USB data lines (e.g. D+/- or SS Tx/Rx). Notify the status of the bit to low level drivers to perform chip specific operation. For instance, low level driver enables USB switches on D+/D- lines to set up data path when the bit is set. Refactored from patch initially authored by Kyle Tso Signed-off-by: Badhri Jagan Sridharan --- Changes since V1: - Removed partner_usb_comm_capable flag. - Fixed capable flag for SNK_NEGOTIATE_CAPABILITIES. --- drivers/usb/typec/tcpm/tcpm.c | 13 +++++++++++++ include/linux/usb/tcpm.h | 5 +++++ 2 files changed, 18 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 0afd8ef692e8..997a1a56c161 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -3429,6 +3429,14 @@ static void tcpm_unregister_altmodes(struct tcpm_port *port) memset(modep, 0, sizeof(*modep)); } +static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable) +{ + tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false"); + + if (port->tcpc->set_partner_usb_comm_capable) + port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable); +} + static void tcpm_reset_port(struct tcpm_port *port) { int ret; @@ -3445,6 +3453,7 @@ static void tcpm_reset_port(struct tcpm_port *port) port->attached = false; port->pd_capable = false; port->pps_data.supported = false; + tcpm_set_partner_usb_comm_capable(port, false); /* * First Rx ID should be 0; set this to a sentinel of -1 so that @@ -3785,6 +3794,8 @@ static void run_state_machine(struct tcpm_port *port) } } else { tcpm_pd_send_control(port, PD_CTRL_ACCEPT); + tcpm_set_partner_usb_comm_capable(port, + !!(port->sink_request & RDO_USB_COMM)); tcpm_set_state(port, SRC_TRANSITION_SUPPLY, PD_T_SRC_TRANSITION); } @@ -4004,6 +4015,8 @@ static void run_state_machine(struct tcpm_port *port) break; case SNK_NEGOTIATE_CAPABILITIES: port->pd_capable = true; + tcpm_set_partner_usb_comm_capable(port, + !!(port->source_caps[0] & PDO_FIXED_USB_COMM)); port->hard_reset_count = 0; ret = tcpm_pd_send_request(port); if (ret < 0) { diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h index 3af99f85e8b9..42fcfbe10590 100644 --- a/include/linux/usb/tcpm.h +++ b/include/linux/usb/tcpm.h @@ -108,6 +108,10 @@ enum tcpm_transmit_type { * is supported by TCPC, set this callback for TCPM to query * whether vbus is at VSAFE0V when needed. * Returns true when vbus is at VSAFE0V, false otherwise. + * @set_partner_usb_comm_capable: + * Optional; The USB Communications Capable bit indicates if port + * partner is capable of communication over the USB data lines + * (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit. */ struct tcpc_dev { struct fwnode_handle *fwnode; @@ -139,6 +143,7 @@ struct tcpc_dev { int (*set_auto_vbus_discharge_threshold)(struct tcpc_dev *dev, enum typec_pwr_opmode mode, bool pps_active, u32 requested_vbus_voltage); bool (*is_vbus_vsafe0v)(struct tcpc_dev *dev); + void (*set_partner_usb_comm_capable)(struct tcpc_dev *dev, bool enable); }; struct tcpm_port;