Re: [PATCH] ASoC: cs42l43: Move shutter IRQ handling into a worker thread

[Takashi Iwai <tiwai@suse.de>]

On Wed, 31 Jul 2024 01:20:40 +0200,
Mark Brown wrote:
> 
> On Tue, Jul 30, 2024 at 11:47:48PM +0200, Jaroslav Kysela wrote:
> > On 30. 07. 24 16:44, Mark Brown wrote:
> 
> > > With some of these slower buses it's not immediately obvious that it's
> > > worth the bother of caching - the overhead of doing the lookup is
> > > negligable in the overall context of handling the interrupt.
> 
> > I don't buy that argument. We should always try to write an optimal code.
> > Every CPU tick counts.
> 
> So do the bytes of memory you'd use caching the pointers!

Adding two more works would be even more wastes, that's the beginning
of the discussion :)

The problem is the order of ASoC component initialization, though;
AFAIUC, the kcontrols aren't instantiated at the point of component
probe, hence you can't get kcontrol objects there.


Takashi