[alsa-devel] No sound after suspend-to-ram

[Kailang]

Hi Takashi,

        [ALC275_FIXUP_DELL_XPS] = {
                .type = HDA_FIXUP_VERBS,
                .v.verbs = (const struct hda_verb[]) {
                        /* Enables internal speaker */
                        {0x20, AC_VERB_SET_COEF_INDEX, 0x1f},
                        {0x20, AC_VERB_SET_PROC_COEF, 0x00c0},
                        {0x20, AC_VERB_SET_COEF_INDEX, 0x30},
                        {0x20, AC_VERB_SET_PROC_COEF, 0x00b1},
                        {}
                }
        },

Could I put code as upper? Was it enter to initial state?
I think it should be execute atfter resume back. Right?

BR,
Kailang

> -----Original Message-----
> From: Takashi Iwai [mailto:tiwai at suse.de] 
> Sent: Saturday, October 24, 2015 3:38 PM
> To: George Gugulea
> Cc: Kailang; alsa-devel at alsa-project.org
> Subject: Re: [alsa-devel] No sound after suspend-to-ram
> 
> On Sat, 24 Oct 2015 00:01:00 +0200,
> George Gugulea wrote:
> > 
> > Sure thing,
> > 
> > Kailang, yes, there is a side headphones jack and it does work OK 
> > after PM suspend-to-ram
> > 
> > I did `echo 1 > 
> /sys/modules/snd_hda_codec/parameters/dump_coef ` and 
> > I attached the output but you are probably interested in this:
> > 
> > Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono .....
> > 447c447
> > <     Coeff 0x1f: 0x00c0
> > ---
> > >     Coeff 0x1f: 0x0000
> > 464c464
> > <     Coeff 0x30: 0x00b1
> > ---
> > >     Coeff 0x30: 0x0090
> > 
> > And after I reset the two processing caps, the sound is back again.
> > 
> > hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x1f hda-verb 
> > /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x00c0 hda-verb /dev/snd/hwC0D0 
> > 0x20 SET_COEF_INDEX 0x30 hda-verb /dev/snd/hwC0D0 0x20 
> SET_PROC_COEF 
> > 0x00b1
> > 
> > I'm not sure that this are the correct parameters of 
> hda-verb (because 
> > I lack the knowledge of alsa development) but based on the 
> result it 
> > seems to be correct
> 
> Yes, the command sequences are correct (sorry I didn't write 
> it in details).  Mostly only some of these bits are 
> mandatory, but only Realtek knows this secret...
> 
> 
> Takashi
> 
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