Re: [PATCH v3 3/4] ALSA: timer: Introduce virtual userspace-driven timers

[Ivan Orlov]

On 8/6/24 14:11, Jaroslav Kysela wrote:
> On 06. 08. 24 14:52, Ivan Orlov wrote:
> > Implement two ioctl calls in order to support virtual userspace-driven
> > ALSA timers.
>
> ...

Hi Jaroslav,

> > +struct snd_utimer_info {
> > +    /*
> > +     * To pretend being a normal timer, we need to know the frame 
> > rate and
> > +     * the period size in frames.
> > +     */
> > +    __u64 frame_rate;
> > +    __u64 period_size;
>
> There should be just one timer resolution in ns member (like in struct 
> snd_timer_ginfo - not frame/period members here - it's too specific). 
> The resolution can be calculated in the user space from the rate and 
> period size.

Ah, yes, I agree... Also, it should help us to avoid complex 
calculations and sanity checks in the kernel space. I'll replace these 
two fields with 'resolution' field in V4, thanks!

> Also naming - the timer API uses snd_timer prefix for structures, thus 
> snd_timer_uinfo should be more appropriate.
Alright, I'll rename the structure.

Thank you so much for the review!

--
Kind regards,
Ivan Orlov