From: Leif Lindholm <leif.lindholm@linaro.org>
To: Evan Lloyd <Evan.Lloyd@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
"edk2-devel (edk2-devel@lists.01.org)" <edk2-devel@lists.01.org>,
Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
Sudeep Holla <Sudeep.Holla@arm.com>,
Catalin Marinas <Catalin.Marinas@arm.com>,
Marc Zyngier <Marc.Zyngier@arm.com>,
Matteo Carlini <Matteo.Carlini@arm.com>,
Stephanie Hughes-Fitt <Stephanie.Hughes-Fitt@arm.com>,
Dong Wei <Dong.Wei@arm.com>, Star Zeng <star.zeng@intel.com>,
Eric Dong <eric.dong@intel.com>,
linaro-acpi@lists.linaro.org,
Graeme Gregory <graeme.gregory@linaro.org>
Subject: Re: HEADLESS flag in ACPI
Date: Thu, 14 Sep 2017 10:20:30 +0100 [thread overview]
Message-ID: <20170914092030.abjnig23phgkp5j6@bivouac.eciton.net> (raw)
In-Reply-To: <AM4PR0801MB144482280E0E3085829201948B6E0@AM4PR0801MB1444.eurprd08.prod.outlook.com>
+ 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
> before we make a commit.
> We want to (re-)submit patches adding HDLCD/GOP for some ARM
> platforms.
> We have previously been asked to make this optional, as some people
> do not want the overhead of GOP (and the frame buffer) in their
> image/RAM. This is fine, and a build flag called HEADLESS would
> seem to fit the bill.
>
> The query arises from the ACPI spec which has (in FADT): "
> HEADLESS 1 12 System Type Attribute. If set indicates the system
> cannot detect the monitor or keyboard / mouse devices."
>
> And what we need to confirm is that there is no case of a system
> with no display still wanting to have keyboard and/or mouse. I
> can't 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
next prev parent reply other threads:[~2017-09-14 9:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-13 12:23 HEADLESS flag in ACPI Evan Lloyd
2017-09-14 9:20 ` Leif Lindholm [this message]
2017-09-14 10:59 ` Zeng, Star
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