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ALSA: hda - Fix detection of dual headphones 

The dual-headphone mode with STAC/IDT codecs is useful only for machines
that have two (or more) built-in headphones.

But, some HP laptops give multiple headphone pin configs, one for the
built-in and another for the separate (likely a docking station) one.
This results in a missing speaker volume control.

This patch adds more check for the dual-headphone mode to avoid this
problem.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-11-18 14:23:37 +01:00
parent d56757abc1
commit 8af3aeb498
1 changed files with 21 additions and 2 deletions
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23
sound/pci/hda/patch_sigmatel.c
View File

@ -3635,6 +3635,26 @@ static void stac92xx_auto_init_hp_out(struct hda_codec *codec)
}
}
static int is_dual_headphones(struct hda_codec *codec)
{
struct sigmatel_spec *spec = codec->spec;
int i, valid_hps;
if (spec->autocfg.line_out_type != AUTO_PIN_SPEAKER_OUT ||
spec->autocfg.hp_outs <= 1)
return 0;
valid_hps = 0;
for (i = 0; i < spec->autocfg.hp_outs; i++) {
hda_nid_t nid = spec->autocfg.hp_pins[i];
unsigned int cfg = snd_hda_codec_get_pincfg(codec, nid);
if (get_defcfg_location(cfg) & AC_JACK_LOC_SEPARATE)
continue;
valid_hps++;
}
return (valid_hps > 1);
}
static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out, hda_nid_t dig_in)
{
struct sigmatel_spec *spec = codec->spec;
@ -3651,8 +3671,7 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
/* If we have no real line-out pin and multiple hp-outs, HPs should
* be set up as multi-channel outputs.
*/
if (spec->autocfg.line_out_type == AUTO_PIN_SPEAKER_OUT &&
spec->autocfg.hp_outs > 1) {
if (is_dual_headphones(codec)) {
/* Copy hp_outs to line_outs, backup line_outs in
* speaker_outs so that the following routines can handle
* HP pins as primary outputs.