Re: hotkey/video framework [was: ibm-acpi-0.2]

[Hiroshi Miura <miura-yiisDzvROlQdnm+yROfE0A@public.gmane.org>]

Hi,

At Tue, 17 Aug 2004 17:15:17 +0800,
Yu, Luming wrote:
> 
> >> 
> >> 'Fn key combination' is common on machines,
> >> so I think we need some abstraction layer or framework on acpi core.
> >
> >One possibility is to just agree on the proc file format and ACPI
> >events for the common features,

I think it's good start. 

> > then have each driver implement them
> >separately. This would probably be simpler than trying to come up with
> >some sort of a wrapper framework as the code involved is fairly simple
> >and there probably isn't much we can share. Then again, there might
> >be, I haven't looked.
> >
> 
> I think the proposaled framework/abstraction layer is NOT just for 
> code sharing. We need to dynamically load the proper hotkey/video driver

I have read three driver, asus, toshiba, and ibm.
These are differ each other.

asus:    notify key event by 'Notify(event num)'
toshiba: polling some device/method for get key event.
ibm:     notify key event by 'Notify(DEVICE_NOTIFY)' then get key by some method.
panasonic: same as ibm but device and method name is differ.

This means difficulties of sharing driver code. 

Dynamic loading is nice propose.
with this code, i can determine which is that machine.

	static struct acpi_table_header *dsdt_info;
        status = acpi_get_table(ACPI_TABLE_DSDT, 1, &dsdt);
        if (ACPI_FAILURE(status))
                /* error */

	dsdt_info = (struct acpi_table_header *) dsdt.pointer;
	chek_which_oem_and_invoke_proper_driver (dsdt->oem_id);

Wrapper driver only need to know oem_ids and driver name mapping.


Hiroshi Miura  --- http://www.da-cha.org/  --- miura-yiisDzvROlQdnm+yROfE0A@public.gmane.org
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