From patchwork Wed Jun 29 23:32:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashant Malani X-Patchwork-Id: 586304 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32A99C43334 for ; Wed, 29 Jun 2022 23:40:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231451AbiF2Xk5 (ORCPT ); Wed, 29 Jun 2022 19:40:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231195AbiF2Xk5 (ORCPT ); Wed, 29 Jun 2022 19:40:57 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC84BBC02 for ; Wed, 29 Jun 2022 16:40:55 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id c6-20020a17090abf0600b001eee794a478so1039727pjs.1 for ; Wed, 29 Jun 2022 16:40:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=u+kTivI5j4VL0Glhx/QLH7bOjgxInGIflDMjRi1pPSo=; b=QEFE2ZREw7PZn1EHum4nOwGJDD33Zno9d4oJAdexunO9n3X4ns8I0JiPd952564aGh pUTkVJkMbnszCLWtgFppUOO0efR1/WSBye2xzGtE2Vo0MHMNqm1kDLz5nxGrwKtlnuVa 2K+3sl2GvDzAi34rgOeBq3XJ8BEzE8ThbSQKg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=u+kTivI5j4VL0Glhx/QLH7bOjgxInGIflDMjRi1pPSo=; b=lzLiWU82tbt44Btd7cwuHQDTT8vrBb3O0FujCWAyjx/KbFq2mFrGz4Zy1yQFBm6Idy uQpM9xEC30DEuqd7bG7ksRAvRTkzAW5HlgsTueXJ/H4gpYpOoory25STmvZpM1LGYqO9 8HWlK2ojrgYsqQ9HTWxK3Q9avROzGKjPbziT82dPPYOvmLSjacqpOtmjMOgEsCtXAvsH m/bRlzt7JvTKjk7ZQe/fKVCrjeooy2rgzfjsrqNVu8LemqjDIVetABhJYVVqfhNeyfLn zdPubPjV8Pdgcs5KUAz3XqV8abk8MVxEQCHTbxA/M8xEi/bQUbIFpoUuYihCQWqY5AE0 0Dtw== X-Gm-Message-State: AJIora8Klyik///P58P8ulWjYQZXN9WMsBHTSIUN47pMBiO24RYl7kIX 5otXzhO3fE7A7fWeVygx72ReBg== X-Google-Smtp-Source: AGRyM1tMSOGpkv0MQnR98QputkS7ul89O7sMd6eMaC0iC1T1BtHrnytRuMeNSy6cQ+dAfGv3Hch2WA== X-Received: by 2002:a17:902:8b87:b0:169:5e5:43de with SMTP id ay7-20020a1709028b8700b0016905e543demr11698212plb.8.1656546055223; Wed, 29 Jun 2022 16:40:55 -0700 (PDT) Received: from pmalani.c.googlers.com.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id rm1-20020a17090b3ec100b001ed27d132c1sm127305pjb.2.2022.06.29.16.40.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Jun 2022 16:40:54 -0700 (PDT) From: Prashant Malani To: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, chrome-platform@lists.linux.dev Cc: bleung@chromium.org, heikki.krogerus@linux.intel.com, Prashant Malani , Daisuke Nojiri , "Dustin L. Howett" , Greg Kroah-Hartman , Guenter Roeck , "Gustavo A. R. Silva" , Kees Cook , Sebastian Reichel , Tzung-Bi Shih Subject: [PATCH 9/9] platform/chrome: cros_ec_typec: Get retimer handle Date: Wed, 29 Jun 2022 23:32:27 +0000 Message-Id: <20220629233314.3540377-10-pmalani@chromium.org> X-Mailer: git-send-email 2.37.0.rc0.161.g10f37bed90-goog In-Reply-To: <20220629233314.3540377-1-pmalani@chromium.org> References: <20220629233314.3540377-1-pmalani@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Where available, obtain the handle to retimer switch specified via firmware, and update the mux configuration callsites to add retimer support for supported modes. Signed-off-by: Prashant Malani --- drivers/platform/chrome/cros_ec_typec.c | 44 +++++++++++++++++++++++-- 1 file changed, 41 insertions(+), 3 deletions(-) diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c index 39e6fd4491a9..38c4ac754ea9 100644 --- a/drivers/platform/chrome/cros_ec_typec.c +++ b/drivers/platform/chrome/cros_ec_typec.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -53,6 +54,7 @@ struct cros_typec_port { struct usb_pd_identity c_identity; struct typec_switch *ori_sw; struct typec_mux *mux; + struct typec_retimer *retimer; struct usb_role_switch *role_sw; /* Variables keeping track of switch state. */ @@ -142,6 +144,12 @@ static int cros_typec_get_switch_handles(struct cros_typec_port *port, goto mux_err; } + port->retimer = fwnode_typec_retimer_get(fwnode); + if (IS_ERR(port->retimer)) { + dev_dbg(dev, "Retimer handle not found.\n"); + goto retimer_sw_err; + } + port->ori_sw = fwnode_typec_switch_get(fwnode); if (IS_ERR(port->ori_sw)) { dev_dbg(dev, "Orientation switch handle not found.\n"); @@ -159,6 +167,8 @@ static int cros_typec_get_switch_handles(struct cros_typec_port *port, role_sw_err: typec_switch_put(port->ori_sw); ori_sw_err: + typec_retimer_put(port->retimer); +retimer_sw_err: typec_mux_put(port->mux); mux_err: return -ENODEV; @@ -203,6 +213,21 @@ static void cros_typec_unregister_altmodes(struct cros_typec_data *typec, int po } } +/* + * Map the Type-C Mux state to retimer state and call the retimer set function. We need this + * because we re-use the Type-C mux state for retimers. + */ +static int cros_typec_retimer_set(struct typec_retimer *retimer, struct typec_mux_state state) +{ + struct typec_retimer_state rstate = { + .alt = state.alt, + .mode = state.mode, + .data = state.data, + }; + + return typec_retimer_set(retimer, &rstate); +} + static int cros_typec_usb_disconnect_state(struct cros_typec_port *port) { port->state.alt = NULL; @@ -211,6 +236,7 @@ static int cros_typec_usb_disconnect_state(struct cros_typec_port *port) usb_role_switch_set_role(port->role_sw, USB_ROLE_NONE); typec_switch_set(port->ori_sw, TYPEC_ORIENTATION_NONE); + cros_typec_retimer_set(port->retimer, port->state); return typec_mux_set(port->mux, &port->state); } @@ -381,9 +407,14 @@ static int cros_typec_init_ports(struct cros_typec_data *typec) static int cros_typec_usb_safe_state(struct cros_typec_port *port) { + int ret; port->state.mode = TYPEC_STATE_SAFE; - return typec_mux_set(port->mux, &port->state); + ret = cros_typec_retimer_set(port->retimer, port->state); + if (!ret) + ret = typec_mux_set(port->mux, &port->state); + + return ret; } /* @@ -480,7 +511,11 @@ static int cros_typec_enable_dp(struct cros_typec_data *typec, port->state.data = &dp_data; port->state.mode = TYPEC_MODAL_STATE(ffs(pd_ctrl->dp_mode)); - return typec_mux_set(port->mux, &port->state); + ret = cros_typec_retimer_set(port->retimer, port->state); + if (!ret) + ret = typec_mux_set(port->mux, &port->state); + + return ret; } static int cros_typec_enable_usb4(struct cros_typec_data *typec, @@ -569,7 +604,10 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num, } else if (port->mux_flags & USB_PD_MUX_USB_ENABLED) { port->state.alt = NULL; port->state.mode = TYPEC_STATE_USB; - ret = typec_mux_set(port->mux, &port->state); + + ret = cros_typec_retimer_set(port->retimer, port->state); + if (!ret) + ret = typec_mux_set(port->mux, &port->state); } else { dev_dbg(typec->dev, "Unrecognized mode requested, mux flags: %x\n",