[alsa-devel] ALC275 COEF stuff?

[Takashi Iwai]

On Wed, 08 Nov 2017 08:34:44 +0100,
Kailang wrote:
> 
>  
> Hi Takashi,
> 
> Attach patch for test.
> Thanks.

OK, let's ask testing on the bugzilla, then queue it.
Thanks!

Takashi

> 
> 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.
> > > > 
> > 
> [2 0000-alc275-no-sound.patch <application/octet-stream (base64)>]
>