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

[Lin, Mengdong]

> -----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?

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
> >
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