Re: [PATCH] add PCI ROMs to sysfs
From: Jon Smirl (jonsmirl_at_yahoo.com)
Date: 07/30/04
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Date: Fri, 30 Jul 2004 14:53:25 -0700 (PDT) To: Greg KH <greg@kroah.com>, Jesse Barnes <jbarnes@engr.sgi.com>
Here's another grungy thing I needed to do to PCI. Multi-headed video
cards don't really implement independent PCI devices even though they
look like independent devices. I've heard that this behavior is needed
for MS Windows compatibility.
I'm missing a PCI call to claim ownership for the secondary device
without also causing a second instance of my driver to be loaded.
Here's the code I'm using, what's the right way to do this?
struct pci_dev *secondary;
/* check the next function on the same card */
secondary = pci_find_slot(dev->pdev->bus->number, dev->pdev->devfn +
1);
if (secondary) {
/* check if class is secondary video */
if (secondary->class == 0x038000) {
DRM_DEBUG("registering secondary video head\n");
/* This code is need to bind the driver to the secondary device */
/* There is no direct pci call to do this, there should be one */
secondary->dev.driver = dev->pdev->dev.driver;
device_bind_driver(&secondary->dev);
/* dev->pdev->driver is not filled until after probe completes */
secondary->driver = to_pci_driver(dev->pdev->dev.driver);
pci_dev_get(secondary);
}
}
=====
Jon Smirl
jonsmirl@yahoo.com
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- Previous message: Jesse Barnes: "Re: [PATCH] add PCI ROMs to sysfs"
- In reply to: Greg KH: "Re: [PATCH] add PCI ROMs to sysfs"
- Next in thread: Vojtech Pavlik: "Re: [PATCH] add PCI ROMs to sysfs"
- Reply: Vojtech Pavlik: "Re: [PATCH] add PCI ROMs to sysfs"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
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