linux-kernel - Re: intel hda regression: 2.6.33-rc{1,2}: hd-audio0 eats 25% CPU (according to top)

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Date:	Fri, 25 Dec 2009 22:59:24 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Maciej Rutecki <maciej.rutecki@...il.com>
Cc:	Sergei Trofimovich <slyich@...il.com>,
	linux-kernel@...r.kernel.org,
	Éric Piel <eric.piel@...mplin-utc.net>
Subject: Re: intel hda regression: 2.6.33-rc{1,2}: hd-audio0 eats 25% CPU 	(according to top)

At Fri, 25 Dec 2009 20:01:46 +0100,
Maciej Rutecki wrote:
> 
> 2009/12/25 Takashi Iwai <tiwai@...e.de>:
> 
> > diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
> > index 950ee5c..f98b47c 100644
> > --- a/sound/pci/hda/hda_codec.c
> > +++ b/sound/pci/hda/hda_codec.c
> > @@ -1327,11 +1327,13 @@ EXPORT_SYMBOL_HDA(snd_hda_query_pin_caps);
> >  */
> >  u32 snd_hda_pin_sense(struct hda_codec *codec, hda_nid_t nid)
> >  {
> > -       u32 pincap = snd_hda_query_pin_caps(codec, nid);
> > -
> > -       if (pincap & AC_PINCAP_TRIG_REQ) /* need trigger? */
> > -               snd_hda_codec_read(codec, nid, 0, AC_VERB_SET_PIN_SENSE, 0);
> > +       u32 pincap;
> >
> > +       if (!codec->no_trigger_sense) {
> > +               pincap = snd_hda_query_pin_caps(codec, nid);
> > +               if (pincap & AC_PINCAP_TRIG_REQ) /* need trigger? */
> > +                       snd_hda_codec_read(codec, nid, 0, AC_VERB_SET_PIN_SENSE, 0);
> > +       }
> >        return snd_hda_codec_read(codec, nid, 0,
> >                                  AC_VERB_GET_PIN_SENSE, 0);
> >  }
> > diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
> > index 1d541b7..0a770a2 100644
> > --- a/sound/pci/hda/hda_codec.h
> > +++ b/sound/pci/hda/hda_codec.h
> > @@ -817,6 +817,7 @@ struct hda_codec {
> >        unsigned int pin_amp_workaround:1; /* pin out-amp takes index
> >                                            * (e.g. Conexant codecs)
> >                                            */
> > +       unsigned int no_trigger_sense:1; /* don't trigger at pin-sensing */
> >  #ifdef CONFIG_SND_HDA_POWER_SAVE
> >        unsigned int power_on :1;       /* current (global) power-state */
> >        unsigned int power_transition :1; /* power-state in transition */
> > diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c
> > index 1a36137..69a941c 100644
> > --- a/sound/pci/hda/patch_analog.c
> > +++ b/sound/pci/hda/patch_analog.c
> > @@ -1186,6 +1186,8 @@ static int patch_ad1986a(struct hda_codec *codec)
> >         */
> >        spec->multiout.no_share_stream = 1;
> >
> > +       codec->no_trigger_sense = 1;
> > +
> >        return 0;
> >  }
> >
> > @@ -1371,6 +1373,8 @@ static int patch_ad1983(struct hda_codec *codec)
> >
> >        codec->patch_ops = ad198x_patch_ops;
> >
> > +       codec->no_trigger_sense = 1;
> > +
> >        return 0;
> >  }
> >
> > @@ -1813,6 +1817,9 @@ static int patch_ad1981(struct hda_codec *codec)
> >                codec->patch_ops.unsol_event = ad1981_hp_unsol_event;
> >                break;
> >        }
> > +
> > +       codec->no_trigger_sense = 1;
> > +
> >        return 0;
> >  }
> >
> > @@ -3118,6 +3125,8 @@ static int patch_ad1988(struct hda_codec *codec)
> >  #endif
> >        spec->vmaster_nid = 0x04;
> >
> > +       codec->no_trigger_sense = 1;
> > +
> >        return 0;
> >  }
> >
> > @@ -3330,6 +3339,8 @@ static int patch_ad1884(struct hda_codec *codec)
> >
> >        codec->patch_ops = ad198x_patch_ops;
> >
> > +       codec->no_trigger_sense = 1;
> > +
> >        return 0;
> >  }
> >
> > @@ -4287,6 +4298,8 @@ static int patch_ad1884a(struct hda_codec *codec)
> >                break;
> >        }
> >
> > +       codec->no_trigger_sense = 1;
> > +
> >        return 0;
> >  }
> >
> > @@ -4623,6 +4636,9 @@ static int patch_ad1882(struct hda_codec *codec)
> >                spec->mixers[2] = ad1882_6stack_mixers;
> >                break;
> >        }
> > +
> > +       codec->no_trigger_sense = 1;
> > +
> >        return 0;
> >  }
> >
> >
> Patch solves the problem.
> 
> Tested-by Maciej Rutecki <maciej.rutecki@...il.com>

Thanks for testing.
I merged the patch now.


Takashi
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