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

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