linux-kernel - Re: [PATCH RFC] video: Add Hyper-V Synthetic Video Frame Buffer Driver

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Message-ID: <20130219184009.GA21783@aepfle.de>
Date:	Tue, 19 Feb 2013 19:40:09 +0100
From:	Olaf Hering <olaf@...fle.de>
To:	Haiyang Zhang <haiyangz@...rosoft.com>
Cc:	"FlorianSchandinat@....de" <FlorianSchandinat@....de>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	KY Srinivasan <kys@...rosoft.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>
Subject: Re: [PATCH RFC] video: Add Hyper-V Synthetic Video Frame Buffer
 Driver

On Tue, Feb 19, Haiyang Zhang wrote:

> The emulated video device is a separate device from the synthetic video.
> The synthetic driver can only take control of the synthetic video, but not
> the emulated video.

Please add this to the comment above.

> Actually, we already have a similar mechanism in ata/ata_piix.c to disable
> emulated IDE drive on Hyper-V, so it won't conflict with the synthetic drive.

I havent read the vesafb code, but I think it can kind of give up the
hardware, something ata_piix can not do.

Olaf
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