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* [PATCH 1/2] hyperv-fb: add pci stub
@ 2013-10-02 11:55 Gerd Hoffmann
  2013-10-02 11:55 ` [PATCH 2/2] hyperv-fb: add blanking support Gerd Hoffmann
                   ` (3 more replies)
  0 siblings, 4 replies; 10+ messages in thread
From: Gerd Hoffmann @ 2013-10-02 11:55 UTC (permalink / raw)
  Cc: Gerd Hoffmann, K. Y. Srinivasan, Haiyang Zhang,
	Jean-Christophe Plagniol-Villard, Tomi Valkeinen,
	open list:Hyper-V CORE AND..., open list:FRAMEBUFFER LAYER,
	open list

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) [sizedM]
        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@redhat.com>
---
 drivers/video/hyperv_fb.c | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/drivers/video/hyperv_fb.c b/drivers/video/hyperv_fb.c
index 8ac99b8..8d456dc 100644
--- a/drivers/video/hyperv_fb.c
+++ b/drivers/video/hyperv_fb.c
@@ -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);
 }
 
-- 
1.8.3.1


^ permalink raw reply related	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2013-10-09  9:53 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-10-02 11:55 [PATCH 1/2] hyperv-fb: add pci stub Gerd Hoffmann
2013-10-02 11:55 ` [PATCH 2/2] hyperv-fb: add blanking support Gerd Hoffmann
2013-10-02 20:43   ` Haiyang Zhang
2013-10-02 14:29 ` [PATCH 1/2] hyperv-fb: add pci stub KY Srinivasan
2013-10-07  6:50   ` Gerd Hoffmann
2013-10-07 17:12     ` KY Srinivasan
2013-10-08  8:41       ` Gerd Hoffmann
2013-10-08 14:48         ` KY Srinivasan
2013-10-02 20:42 ` Haiyang Zhang
2013-10-09  9:53 ` Tomi Valkeinen

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