CALLOUT for dri device

CALLOUT for dri device

[Jon Smirl]

Can I make a CALLOUT for a class of devices, like all DRI devices? When the
driver is loaded I need to run a userspace program to reset the card (if
secondary), query the monitor EDID, etc. This has to be done in userspace since
reseting the card is a VM86 operation.

Will CALLOUT work for compiled in drivers? So as soon as the kernel is able my
userspace add will get executed.

==Jon Smirl
jonsmirl@yahoo.com

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Re: CALLOUT for dri device

[Greg KH]

On Sat, Dec 27, 2003 at 09:26:50AM -0800, Jon Smirl wrote:
> Can I make a CALLOUT for a class of devices, like all DRI devices? When the
> driver is loaded I need to run a userspace program to reset the card (if
> secondary), query the monitor EDID, etc. This has to be done in userspace since
> reseting the card is a VM86 operation.

Don't use udev for this.  Use hotplug for things like this.  You can add
your dri specific scripts to /etc/hotplug.d/dri/ 

See the documentation in the /sbin/hotplug script on how to do this.

thanks,

greg k-h


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Re: CALLOUT for dri device

[Greg KH]

On Sat, Dec 27, 2003 at 09:26:50AM -0800, Jon Smirl wrote:
> Can I make a CALLOUT for a class of devices, like all DRI devices? When the
> driver is loaded I need to run a userspace program to reset the card (if
> secondary), query the monitor EDID, etc. This has to be done in userspace since
> reseting the card is a VM86 operation.

Don't use udev for this.  Use hotplug for things like this.  You can add
your dri specific scripts to /etc/hotplug.d/dri/ 

See the documentation in the /sbin/hotplug script on how to do this.

thanks,

greg k-h


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Re: CALLOUT for dri device

[Greg KH]

On Sat, Dec 27, 2003 at 09:26:50AM -0800, Jon Smirl wrote:
> Can I make a CALLOUT for a class of devices, like all DRI devices? When the
> driver is loaded I need to run a userspace program to reset the card (if
> secondary), query the monitor EDID, etc. This has to be done in userspace since
> reseting the card is a VM86 operation.

Don't use udev for this.  Use hotplug for things like this.  You can add
your dri specific scripts to /etc/hotplug.d/dri/ 

See the documentation in the /sbin/hotplug script on how to do this.

thanks,

greg k-h


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Re: CALLOUT for dri device

[Greg KH]

On Sat, Dec 27, 2003 at 09:26:50AM -0800, Jon Smirl wrote:
> Can I make a CALLOUT for a class of devices, like all DRI devices? When the
> driver is loaded I need to run a userspace program to reset the card (if
> secondary), query the monitor EDID, etc. This has to be done in userspace since
> reseting the card is a VM86 operation.

Don't use udev for this.  Use hotplug for things like this.  You can add
your dri specific scripts to /etc/hotplug.d/dri/ 

See the documentation in the /sbin/hotplug script on how to do this.

thanks,

greg k-h


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Re: CALLOUT for dri device

[Jon Smirl]

That was easy, now it's calling my reset program. How do I tell if it is an
insert or remove event? My program gets called on both.

Does this work for built-in drivers? Will I get an insert event as soon as
userspace is running?

--- Greg KH <greg@kroah.com> wrote:
> On Sat, Dec 27, 2003 at 09:26:50AM -0800, Jon Smirl wrote:
> > Can I make a CALLOUT for a class of devices, like all DRI devices? When the
> > driver is loaded I need to run a userspace program to reset the card (if
> > secondary), query the monitor EDID, etc. This has to be done in userspace
> since
> > reseting the card is a VM86 operation.
> 
> Don't use udev for this.  Use hotplug for things like this.  You can add
> your dri specific scripts to /etc/hotplug.d/dri/ 
> 
> See the documentation in the /sbin/hotplug script on how to do this.
> 
> thanks,
> 
> greg k-h


==Jon Smirl
jonsmirl@yahoo.com

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Re: CALLOUT for dri device

[Greg KH]

On Sat, Dec 27, 2003 at 01:19:55PM -0800, Jon Smirl wrote:
> That was easy, now it's calling my reset program. How do I tell if it is an
> insert or remove event? My program gets called on both.

Look at the ACTION environment variable.

> Does this work for built-in drivers? 

yes.

> Will I get an insert event as soon as userspace is running?

no, the event happens when your device is registered.  There is
userspace running very early, look at the initramfs stuff.  So you will
probably have to put your application into the initramfs image.  People
are working on getting that all working properly.

Hope this helps,

greg k-h


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Re: CALLOUT for dri device

[Jon Smirl]

--- Greg KH <greg@kroah.com> wrote:
> > Will I get an insert event as soon as userspace is running?
> 
> no, the event happens when your device is registered.  There is

When do built-in drivers get registered?

> userspace running very early, look at the initramfs stuff.  So you will
> probably have to put your application into the initramfs image.  People
> are working on getting that all working properly.
> 
> Hope this helps,
> 
> greg k-h


==Jon Smirl
jonsmirl@yahoo.com

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Re: CALLOUT for dri device

[Greg KH]

On Sat, Dec 27, 2003 at 02:41:04PM -0800, Jon Smirl wrote:
> --- Greg KH <greg@kroah.com> wrote:
> > > Will I get an insert event as soon as userspace is running?
> > 
> > no, the event happens when your device is registered.  There is
> 
> When do built-in drivers get registered?

Whenever they happen to get initialized in the startup sequence.  This
is usually determined by the link order in the module_init() timeframe.

greg k-h


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