[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-kernel
Subject:    Re: Fwd: Patch to control VGA bus routing and active VGA device.
From:       Jon Smirl <jonsmirl () gmail ! com>
Date:       2005-01-27 9:59:45
Message-ID: 9e473391050127015970e1fedc () mail ! gmail ! com
[Download RAW message or body]

On Mon, 24 Jan 2005 20:24:59 -0800, Greg KH <greg@kroah.com> wrote:
> This can be done today in the bus specific match functions.  And because
> of that, I would argue that this belongs in the bus specific code, and
> not in the driver core, as it's up to the bus to know what the different
> types of "matches" that can happen, and what the priority is.

Here's a version of the VGA control code that actually works. It helps
if I pci_enable() the device before using it. There was nothing wrong
with the routing code.

I can also control multiple cards on the same bus by turning on/off
their response to IO space and then enabling VGA via the standard
ports. I can use this to move my console from card to card.

I have this code in drivers/pci because it needs to know add/remove
from hotplug. Is there a better way to structure it? Note that this is
not a VGA device, it is just a mechanism for controlling which VGA
device is active.

Another item I need to add is generating an initial hotplug event for
each secondary card. This event has to happen even if there is a card
specific driver loaded. The event will be used to run the reset
program needed by secondary cards.

-- 
Jon Smirl
jonsmirl@gmail.com

["patch" (application/octet-stream)]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[prev in list] [next in list] [prev in thread] [next in thread]