Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7ad96847 authored by Gerd Hoffmann's avatar Gerd Hoffmann Committed by Tomi Valkeinen
Browse files

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@dhcp231 ~]# 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: default avatarGerd Hoffmann <kraxel@redhat.com>
Acked-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 7831b2ae

drivers/video/hyperv_fb.c

+39 −1
Original line number Diff line number Diff line
@@ -795,12 +795,21 @@ static int hvfb_remove(struct hv_device *hdev) 
}





static DEFINE_PCI_DEVICE_TABLE(pci_stub_id_table) = {

	{

		.vendor      = PCI_VENDOR_ID_MICROSOFT,

		.device      = PCI_DEVICE_ID_HYPERV_VIDEO,

	},

	{ /* end of list */ }

};



static const struct hv_vmbus_device_id id_table[] = {

	/* Synthetic Video Device GUID */

	{HV_SYNTHVID_GUID},

	{}

};



MODULE_DEVICE_TABLE(pci, pci_stub_id_table);

MODULE_DEVICE_TABLE(vmbus, id_table);



static struct hv_driver hvfb_drv = {
@@ -810,14 +819,43 @@ static struct hv_driver hvfb_drv = { 
	.remove = hvfb_remove,

};



static int hvfb_pci_stub_probe(struct pci_dev *pdev,

			       const struct pci_device_id *ent)

{

	return 0;

}



static void hvfb_pci_stub_remove(struct pci_dev *pdev)

{

}



static struct pci_driver hvfb_pci_stub_driver = {

	.name =		KBUILD_MODNAME,

	.id_table =	pci_stub_id_table,

	.probe =	hvfb_pci_stub_probe,

	.remove =	hvfb_pci_stub_remove,

};



static int __init hvfb_drv_init(void)

{

	return vmbus_driver_register(&hvfb_drv);

	int ret;



	ret = vmbus_driver_register(&hvfb_drv);

	if (ret != 0)

		return ret;



	ret = pci_register_driver(&hvfb_pci_stub_driver);

	if (ret != 0) {

		vmbus_driver_unregister(&hvfb_drv);

		return ret;

	}



	return 0;

}



static void __exit hvfb_drv_exit(void)

{

	pci_unregister_driver(&hvfb_pci_stub_driver);

	vmbus_driver_unregister(&hvfb_drv);

}