Re: [PATCH 16/20] omapfb: dispc: Allow multiple external IRQ handlers

[Imre Deak <imre.deak@nokia.com>]

On Wed, Jun 24, 2009 at 02:16:08PM +0200, Balbi Felipe (Nokia-D/Helsinki) wrote:
> On Wed, Jun 24, 2009 at 01:33:41PM +0200, Deak Imre (Nokia-D/Helsinki) wrote:
> > From: Daniel Stone <daniel.stone@nokia.com>
> > 
> > Previously, the only external (to dispc.c) IRQ handler was RFBI's
> > frame done handler.  dispc's IRQ framework was very dumb: you could only
> > have one handler, and the semantics of {request,free}_irq were odd, to
> > say the least.
> > 
> > The new framework allows multiple consumers to register arbitrary IRQ
> > masks.
> 
> No chance to use genirq ?
> 
> Then rfbi and others could simply request_irq() as usual

The problem with that is that we want to register handlers to take
care of - possibly - multiple interrupt events. We do this by passing
a mask of events to our IRQ register function, that the handler should
be called for.

With the current genirq interface this is not possible, thus we
need our own implementation.

--Imre