CALLOUT for dri device
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
[email protected]
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Quoted 4 lines · 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.
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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Quoted 4 lines · 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.
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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Quoted 4 lines · 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.
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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Quoted 4 lines · 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.
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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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?
Quoted 7 lines · --- Greg KH
Quoted 3 lines · 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
Quoted 1 line
reseting the card is a VM86 operation.
Quoted 8 lines
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/hotplugscript on how to do this.thanks,
greg k-h
==Jon Smirl
[email protected]
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Quoted 2 lines · 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.
Look at the ACTION environment variable.
Quoted 1 line
Does this work for built-in drivers?
yes.
Quoted 1 line
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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Quoted 3 lines · --- Greg KH
Quoted 1 line
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?
Quoted 7 lines
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
[email protected]
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Quoted 6 lines · Jon Smirl
Quoted 3 lines · --- Greg KH
Quoted 1 line
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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