[alsa-devel] ALC275 COEF stuff?

[Kailang]

Hi Takashi,

Attach patch for test.
Thanks.

BR,
Kailang

> -----Original Message-----
> From: Takashi Iwai [mailto:tiwai at suse.de] 
> Sent: Wednesday, November 08, 2017 3:11 PM
> To: Kailang
> Subject: Re: ALC275 COEF stuff?
> 
> On Wed, 08 Nov 2017 07:50:27 +0100,
> Kailang wrote:
> > 
> > 
> > Hi Takashi,
> > 
> > ALC275 had no EAPD control COEF register.
> > So, BIOS verb table default will write COEF Index 0x0e bit 0 to 1.
> > This is enable class-D power up. 
> > Windows restart will remove driver, it will write Index 
> 0x0e bit 0 to 
> > 0. (Power down class-D power) Maybe this will resolve the pop noise.
> > 
> > So, I think add write COEF Index 0x0e bit 0 to 1 at EAPD 
> site will sovle this issue.
> > I could make a patch for you.
> 
> Great, thanks!
> 
> BTW, there is another bug report about the missing right 
> speaker output on Huawei MateBook X with ALC298:
>   https://bugzilla.kernel.org/show_bug.cgi?id=197801
> 
> Can it be some missing COEF, too?
> 
> 
> Takashi
> 
> 
> > Thanks.
> > 
> > BR,
> > Kailang
> > 
> > > -----Original Message-----
> > > From: Takashi Iwai [mailto:tiwai at suse.de]
> > > Sent: Tuesday, November 07, 2017 9:00 PM
> > > To: Kailang
> > > Subject: ALC275 COEF stuff?
> > > 
> > > Hi Kailang,
> > > 
> > > we got a bug report about the possibly missing COEF setup for
> > > ALC275 on Sony VAIO.
> > >   https://bugzilla.kernel.org/show_bug.cgi?id=197737
> > > 
> > > Could you check whether the suggested verbs are correct?
> > > 
> > > Thanks!
> > > 
> > > 
> > > Takashi
> > > 
> > > 
> > > ------Please consider the environment before printing this e-mail.
> > > 
> 
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