From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 8EDBBC432C3 for ; Sat, 16 Nov 2019 16:17:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 63A2121479 for ; Sat, 16 Nov 2019 16:17:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573921038; bh=he1wjEhFAwwWAUwEw1PmINc7L+xpclqFnPx9YRYPgPw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=R0nIGa0P2jqolz+gsIgm9iPz62Be0xz//EQkotLrtPjyYrPh6ECm3UF7Yhrc+H268 cfkYWAdHKWA9BGosrjnjWXKL9QzoiLkiI6FXHclmMFXuIQHJVrP/iB6amogtu3xjLp ga2lclqXMRcLuPqpyY1W9XkgD/1Gplu9jNrb+kQw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731992AbfKPQRR (ORCPT ); Sat, 16 Nov 2019 11:17:17 -0500 Received: from mail.kernel.org ([198.145.29.99]:53408 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729527AbfKPPqu (ORCPT ); Sat, 16 Nov 2019 10:46:50 -0500 Received: from sasha-vm.mshome.net (unknown [50.234.116.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D82F820870; Sat, 16 Nov 2019 15:46:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573919210; bh=he1wjEhFAwwWAUwEw1PmINc7L+xpclqFnPx9YRYPgPw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s68mZhIyBGM4niSF0zdSmJ4lDz1as6psZNcF/XTTDb7W3B1fgDRgE4OV7iP7a8tgF ha40/RvN8/pCDwc2r8iEOR5d/QNCJjBazKtjIPGJl34EMJ1VcpUjdfcHjJHt/WERPj Yqpwbo9rqhkOj+l/+Veq//BXwv5oD+1hcTbg9/yE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Badhri Jagan Sridharan , Rob Herring , Heikki Krogerus , Greg Kroah-Hartman , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 215/237] usb: typec: tcpm: charge current handling for sink during hard reset Date: Sat, 16 Nov 2019 10:40:50 -0500 Message-Id: <20191116154113.7417-215-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191116154113.7417-1-sashal@kernel.org> References: <20191116154113.7417-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Badhri Jagan Sridharan [ Upstream commit 157c0f2f641a9938382b092c64548ebdabfe25e0 ] During the initial connect to a non-pd port, sink would hard reset twice before deeming that the port partner is non-pd. TCPM sets the the charge path to false during the hard reset. This causes unnecessary connects/disconnects of charge path and makes port take longer to charge from the non-pd ports. Avoid this by not setting the charge path to false unless the partner has already identified to be pd capable. When partner is a pd port, set the charge path to false in SNK_HARD_RESET_SINK_OFF. Set the current limits to default value based of CC pull up and resume the charge path when port enters SNK_HARD_RESET_SINK_ON. Signed-off-by: Badhri Jagan Sridharan Reviewed-by: Rob Herring Reviewed-by: Heikki Krogerus -------- Changes in V3: Rebase on top of usb-next Changes in V2: Based on feedback of jackp@codeaurora.org - vsafe_5v_hard_reset flag from tcpc_config is removed - Patch only differentiates between pd port partner and non-pd port partner V1 version of the patch is here: https://lkml.org/lkml/2018/9/14/11 Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/typec/tcpm.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 819ae3b2bd7e8..39cf190012393 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -3322,7 +3322,8 @@ static void run_state_machine(struct tcpm_port *port) case SNK_HARD_RESET_SINK_OFF: memset(&port->pps_data, 0, sizeof(port->pps_data)); tcpm_set_vconn(port, false); - tcpm_set_charge(port, false); + if (port->pd_capable) + tcpm_set_charge(port, false); tcpm_set_roles(port, port->self_powered, TYPEC_SINK, TYPEC_DEVICE); /* @@ -3354,6 +3355,12 @@ static void run_state_machine(struct tcpm_port *port) * Similar, dual-mode ports in source mode should transition * to PE_SNK_Transition_to_default. */ + if (port->pd_capable) { + tcpm_set_current_limit(port, + tcpm_get_current_limit(port), + 5000); + tcpm_set_charge(port, true); + } tcpm_set_attached_state(port, true); tcpm_set_state(port, SNK_STARTUP, 0); break; -- 2.20.1