[alsa-devel] Bug report - patch_realtek.c - Laptop HP COMPAQ B1900 Series

[Takashi Iwai]

At Thu, 16 Feb 2012 11:41:10 +0800,
joey.jiaojg wrote:
> 
> And now this code works:
> /* toggle speaker-output according to the hp-jack state */
> static void alc260_b1900_automute(struct hda_codec *codec)
> {
>          unsigned int present;
> 
>          present = snd_hda_jack_detect(codec, 0x0f);
>          if (present) {
>                  snd_hda_codec_write_cache(codec, 0x01, 0,
>                                            AC_VERB_SET_GPIO_MASK, 0);
>                  snd_hda_codec_write_cache(codec, 0x01, 0,
>                                            AC_VERB_SET_GPIO_DIRECTION,
>                                            0);
>                  snd_hda_codec_write_cache(codec, 0x01, 0,
>                                            AC_VERB_SET_GPIO_DATA,
>                                            1);
>          } else {
>                  snd_hda_codec_write_cache(codec, 0x01, 0,
>                                            AC_VERB_SET_GPIO_MASK, 1);
>                  snd_hda_codec_write_cache(codec, 0x01, 0,
>                                            AC_VERB_SET_GPIO_DIRECTION,
>                                            1);
>                  snd_hda_codec_write_cache(codec, 0x01, 0,
>                                            AC_VERB_SET_GPIO_DATA,
>                                            0);
>          }
> }

The GPIO_MASK and GPIO_DIRECTION need to be set only once in the init
verbs, both to 1.  Then you just need to flip GPIO_DATA between 0 and
1 in the unsol event handler.


Takashi