[alsa-devel] Remove depop delay for suspend and resume

[Takashi Iwai]

At Fri, 29 Nov 2013 08:13:05 +0000,
Lin, Mengdong wrote:
> 
> > -----Original Message-----
> > From: Kailang [mailto:kailang at realtek.com]
> > Sent: Friday, November 29, 2013 3:08 PM
> > To: Takashi Iwai; Lin, Mengdong
>  
> > Hi Takashi,
> > 
> > I know your concerm.
> > Thanks.
> > 
> > Hi Mengdong,
> > 
> > Could you only remove it on you test image?
> 
> Thank you for the info! I only tested Baytrail-M platform.
> 
> Is it possible to add a flag and set the flag a in board-specific fixup?

Yes, feel free to hack struct alc_spec.


Takashi

> 
> Regards
> Mengdong
> 
>  
> > > At Fri, 29 Nov 2013 10:48:20 +0800,
> > > Kailang wrote:
> > >>
> > >> Hi Takashi,
> > >>
> > >> Intel test alc262.
> > >> They find the suspend and resume time were > 50ms.
> > >> So, I delete the delay for alc_eapd_shutup and alc_resume.
> > >> If we want to have depop functions, we will follow like alc283.
> > >
> > > Which delay value to take is pretty specific to machine.  Removing
> > > delay will likely cause problem on other machines.
> > >
> > > So, if we'd remove delays, do it only for tested machines, not do
> > > blindly to all machines using the same codec chips.  The pop noise
> > > isn't only determined by a codec chip but rather influenced by the
> > > whole hardware analog design.
> > >
> > >
> > > thanks,
> > >
> > > Takashi
> > >
> > > ------Please consider the environment before printing this e-mail.
>