Hi Joseph,
echo 0 > /sys/module/snd_hda_intel/parameters/power_save
Could you give it a try? Then got dump also.
If it passed, please test my two patches also. Then get dump again.
This was AMD chipset. I hadn't seen this issue on INTEL platform.
Thanks.
> -----Original Message-----
> From: Takashi Iwai <tiwai@xxxxxxx>
> Sent: Friday, June 9, 2023 2:56 PM
> To: Kailang <kailang@xxxxxxxxxxx>
> Cc: Joseph C. Sible <josephcsible@xxxxxxxxx>; Bagas Sanjaya
> <bagasdotme@xxxxxxxxx>; regressions@xxxxxxxxxxxxxxx; perex@xxxxxxxx;
> tiwai@xxxxxxxx; alsa-devel@xxxxxxxxxxxxxxxx
> Subject: Re: Fwd: [Bug 217440] New: ALC236 audio disappears from HP
> 15z-fc000 on warm boot
>
>
> External mail.
>
>
>
> On Fri, 09 Jun 2023 05:04:29 +0200,
> Kailang wrote:
> >
> > Hi Takashi,
> >
> > ALC236 works normally.
> > But codec register can't show it. (it shows "Invalid AFG subtree")
> > Could you know why?
>
> It's the call of snd_hda_get_subnodes(), i.e. snd_hdac_get_subnodes(), which
> simply reads the raw parameter value (uncached)
> AC_PAR_NODE_COUNT:
>
> int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
> hda_nid_t *start_id) {
> unsigned int parm;
>
> parm = snd_hdac_read_parm_uncached(codec, nid,
> AC_PAR_NODE_COUNT);
> if (parm == -1) {
> *start_id = 0;
> return 0;
> }
> *start_id = (parm >> 16) & 0x7fff;
> return (int)(parm & 0x7fff);
> }
>
> So it means the read of this parameter failed.
>
> I suppose this is under the power-save, and it might be some timing issue?
> What if you disable the codec power saving? The easiest way would be to
> pass
> echo 0 > /sys/module/snd_hda_intel/parameters/power_save
>
>
> thanks,
>
> Takashi
>
> >
> > BR,
> > Kailang
> > > -----Original Message-----
> > > From: Joseph C. Sible <josephcsible@xxxxxxxxx>
> > > Sent: Thursday, June 8, 2023 10:43 PM
> > > To: Kailang <kailang@xxxxxxxxxxx>
> > > Cc: Takashi Iwai <tiwai@xxxxxxx>; Bagas Sanjaya
> > > <bagasdotme@xxxxxxxxx>; regressions@xxxxxxxxxxxxxxx; perex@xxxxxxxx;
> > > tiwai@xxxxxxxx; alsa-devel@xxxxxxxxxxxxxxxx
> > > Subject: Re: Fwd: [Bug 217440] New: ALC236 audio disappears from HP
> > > 15z-fc000 on warm boot
> > >
> > >
> > > External mail.
> > >
> > >
> > >
> > > On Thu, Jun 8, 2023 at 2:32 AM Kailang <kailang@xxxxxxxxxxx> wrote:
> > > >
> > > > Could you use your patch to dump codec info again?
> > > > I want to check it will also show "invalid AFG subtree".
> > >
> > > Okay, here's the same command's output again, this time from under
> > > the kernel with my patch that does fix the problem. It does also
> > > show "invalid AFG subtree".
> > >
> > > Thanks,
> > >
> > > Joseph C. Sible
> > >
> > > ------Please consider the environment before printing this e-mail.
