linux-kernel - RE: [PATCH 1/2] hyperv-fb: add pci stub

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Message-ID: <f163f7a7f4804187821668ce53e19119@DFM-DB3MBX15-06.exchange.corp.microsoft.com>
Date:	Wed, 2 Oct 2013 20:42:02 +0000
From:	Haiyang Zhang <haiyangz@...rosoft.com>
To:	Gerd Hoffmann <kraxel@...hat.com>
CC:	KY Srinivasan <kys@...rosoft.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	"open list:Hyper-V CORE AND..." <devel@...uxdriverproject.org>,
	"open list:FRAMEBUFFER LAYER" <linux-fbdev@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] hyperv-fb: add pci stub



> -----Original Message-----
> From: linux-fbdev-owner@...r.kernel.org [mailto:linux-fbdev-
> owner@...r.kernel.org] On Behalf Of Gerd Hoffmann
> Sent: Wednesday, October 2, 2013 7:55 AM
> Cc: Gerd Hoffmann; KY Srinivasan; Haiyang Zhang; Jean-Christophe Plagniol-
> Villard; Tomi Valkeinen; open list:Hyper-V CORE AND...; open
> list:FRAMEBUFFER LAYER; open list
> Subject: [PATCH 1/2] hyperv-fb: add pci stub
> 
> This patch adds a pci stub driver to hyper-fb.  The hyperv framebuffer driver
> will bind to the pci device then, so linux kernel and userspace know there is a
> proper kernel driver for the device active.  lspci shows this for example:
> 
> [root@...p231 ~]# lspci -vs8
> 00:08.0 VGA compatible controller: Microsoft Corporation Hyper-V virtual
> VGA (prog-if 00 [VGA controller])
>         Flags: bus master, fast devsel, latency 0, IRQ 11
>         Memory at f8000000 (32-bit, non-prefetchable) [size=64M]
>         Expansion ROM at <unassigned> [disabled]
>         Kernel driver in use: hyperv_fb
> 
> Another effect is that the xorg vesa driver will not attach to the device and
> thus the Xorg server will automatically use the fbdev driver instead.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>

Acked-by: Haiyang Zhang <haiyangz@...rosoft.com>

Thank you for fixing this!

- Haiyang


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