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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1712CC77B73 for ; Sun, 21 May 2023 09:23:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230036AbjEUJXo (ORCPT ); Sun, 21 May 2023 05:23:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229511AbjEUJXn (ORCPT ); Sun, 21 May 2023 05:23:43 -0400 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72E85BE; Sun, 21 May 2023 02:23:42 -0700 (PDT) Received: by mail-ej1-x629.google.com with SMTP id a640c23a62f3a-953343581a4so722371066b.3; Sun, 21 May 2023 02:23:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1684661020; x=1687253020; h=content-transfer-encoding:in-reply-to:subject:from:references:cc:to :content-language:user-agent:mime-version:date:message-id:from:to:cc :subject:date:message-id:reply-to; bh=FKZukhm5GSKmU51vFPYjTGL4UgfSHtcD+TagC/Ptxm0=; b=skLr/EdpMfEGH9Rbaj/MDqy/ZaCgApTqRce7kKKb/XpIOmxL5ymm0tNmZTn+iosc5T pCI3QttHtALspn/OgQ4CrnDoE/S0wLEUD2mjP/0KT3yfLlcBGDtXdwl4nzjh4LEsAW55 fRPctXrHaSyg3rch1vDJ2o5yzUXb1A18zRpFXRXV5HIH6jzLRu1pa2L7yKawF227dQmq uLWwgNJLYrWX6dIFhrKvw5i2ktBJSkKvZXIiTp1Di66t+lSgvkbD3urv7w5hyFFjEAaJ JbuRkwrpvzf+w0wh1H5w5O6z4wrX6RXTPbkaSodDnd54zUW3q+FZ0mDG5FeFeE1Shweh RkGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684661020; x=1687253020; h=content-transfer-encoding:in-reply-to:subject:from:references:cc:to :content-language:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=FKZukhm5GSKmU51vFPYjTGL4UgfSHtcD+TagC/Ptxm0=; b=JvbRCJrACtNhwZxJFR4Oh2uXB5RK4lEfb48SYUWn4J/0vyejhPomNyPPQk0Zea5Q6a lgPY2kKvzbbaCrawrN7Sq4pCKnrR4KuO6r5MK/dBMEBt1ImLBcWfJBgJC3g/r1IVtb87 RLMXFolD7AahHHxcDyIZXg39tpk71InRHAQxxfeN4fG2cCvN9QJKSnjs2WxeP1i40Qvc wCE2tqZQsF3cSL7ZVTRrgWQISGQzOh9asFwLjt3CuLpiH1uygc0OTkU5c3lRFQzvReEO 7VQ2GgXVJRAnanIiq6aHELewENCNhbNscIG5vbMLBgRaUhT9Re9+1abj7DzqT8gNKwi8 YB9Q== X-Gm-Message-State: AC+VfDxaxN/grMGwhLQbypxJ7LtiZAN60zT4/ePuZgkD/jiNkzGlpHqD AE/O3CTvdLL7duACs0Wlx+U= X-Google-Smtp-Source: ACHHUZ6F95+Byml2u7GCsJXRFro0lfF2gly6Xq17xAqm93aO+AjPp3AXFSISVTQTNvriGN6myyKvsA== X-Received: by 2002:a17:906:da89:b0:94e:70bb:5f8a with SMTP id xh9-20020a170906da8900b0094e70bb5f8amr6049235ejb.66.1684661019559; Sun, 21 May 2023 02:23:39 -0700 (PDT) Received: from ?IPV6:2a02:168:575a:b00b:a38f:4e43:c984:c3e8? ([2a02:168:575a:b00b:a38f:4e43:c984:c3e8]) by smtp.googlemail.com with ESMTPSA id gv3-20020a1709072bc300b0094f3b18044bsm1711947ejc.218.2023.05.21.02.23.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 21 May 2023 02:23:38 -0700 (PDT) Message-ID: <6f1e866b-a96a-3134-c735-c941681b0638@gmail.com> Date: Sun, 21 May 2023 11:23:37 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Content-Language: en-US To: Mario Limonciello Cc: linux-i2c@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Evan.Quan@amd.com, Lijo.Lazar@amd.com, Sanket.Goswami@amd.com, heikki.krogerus@linux.intel.com, ajayg@nvidia.com, andriy.shevchenko@linux.intel.com References: <20230518161150.92959-1-mario.limonciello@amd.com> From: Gregor Riepl Subject: Re: [PATCH v2] usb: typec: ucsi: Mark dGPUs as DEVICE scope In-Reply-To: <20230518161150.92959-1-mario.limonciello@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org > As the power supply for a dGPU is only for powering devices connected > to dGPU, create a device property to indicate that the UCSI endpoint > is only for the scope of `POWER_SUPPLY_SCOPE_DEVICE`. Is this a given fact? I could imagine that a dGPU device would be capable of feeding power back into the system, for example when an external docking station or display device has a power supply connected to it. Although I don't think it's possible (or safe) with a desktop system, maybe a portable computer with a discrete GPU would be able to do this?