From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 12B0C21E87993 for ; Thu, 14 Sep 2017 03:56:53 -0700 (PDT) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Sep 2017 03:59:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,392,1500966000"; d="scan'208";a="1195007434" Received: from fmsmsx106.amr.corp.intel.com ([10.18.124.204]) by fmsmga001.fm.intel.com with ESMTP; 14 Sep 2017 03:59:51 -0700 Received: from shsmsx103.ccr.corp.intel.com (10.239.4.69) by FMSMSX106.amr.corp.intel.com (10.18.124.204) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 14 Sep 2017 03:59:51 -0700 Received: from shsmsx151.ccr.corp.intel.com ([169.254.3.98]) by SHSMSX103.ccr.corp.intel.com ([169.254.4.219]) with mapi id 14.03.0319.002; Thu, 14 Sep 2017 18:59:49 +0800 From: "Zeng, Star" To: Leif Lindholm , Evan Lloyd CC: Lorenzo Pieralisi , "Dong, Eric" , Ard Biesheuvel , "Marc Zyngier" , Catalin Marinas , "edk2-devel (edk2-devel@lists.01.org)" , "linaro-acpi@lists.linaro.org" , "Stephanie Hughes-Fitt" , Sudeep Holla , Dong Wei , "Zeng, Star" Thread-Topic: [edk2] HEADLESS flag in ACPI Thread-Index: AQHTLTrQA010i8fYXku4Km+7bfYHYaK0NfmQ Date: Thu, 14 Sep 2017 10:59:48 +0000 Message-ID: <0C09AFA07DD0434D9E2A0C6AEB0483103B958CAF@SHSMSX151.ccr.corp.intel.com> References: <20170914092030.abjnig23phgkp5j6@bivouac.eciton.net> In-Reply-To: <20170914092030.abjnig23phgkp5j6@bivouac.eciton.net> Accept-Language: zh-CN, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] MIME-Version: 1.0 Subject: Re: HEADLESS flag in ACPI X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Sep 2017 10:56:53 -0000 Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable There should be platform has terminal console by serial, but has no VIDEO. Thanks, Star -----Original Message----- From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Leif= Lindholm Sent: Thursday, September 14, 2017 5:21 PM To: Evan Lloyd Cc: Lorenzo Pieralisi ; Dong, Eric ; Ard Biesheuvel ; Marc Zyngier ; Catalin Marinas ; edk2-devel (edk2= -devel@lists.01.org) ; linaro-acpi@lists.linaro.or= g; Stephanie Hughes-Fitt ; Sudeep Holla ; Dong Wei ; Zeng, Star Subject: Re: [edk2] HEADLESS flag in ACPI + MdeModulePkg maintainers (GOP), linaro-acpi, Graeme, Ard. On Wed, Sep 13, 2017 at 12:23:01PM +0000, Evan Lloyd wrote: > We have a minor conundrum, and would like an element of consensus=20 > before we make a commit. > We want to (re-)submit patches adding HDLCD/GOP for some ARM=20 > platforms. > We have previously been asked to make this optional, as some people do=20 > not want the overhead of GOP (and the frame buffer) in their=20 > image/RAM. This is fine, and a build flag called HEADLESS would seem=20 > to fit the bill. >=20 > The query arises from the ACPI spec which has (in FADT): " > HEADLESS 1 12 System Type Attribute. If set indicates the system=20 > cannot detect the monitor or keyboard / mouse devices." >=20 > And what we need to confirm is that there is no case of a system with=20 > no display still wanting to have keyboard and/or mouse. I can't=20 > imagine there is, but thought it best to check. > > Any thoughts? I can't think of any. Even if your video is only accessible via BMC, that's still video. / Leif _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel