openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[ALSA] hda: STAC927x power down inactive DACs 

On several laptops that have STAC9228 codecs have unused DACs,
this powers them down to a D3 state.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Matthew Ranostay 2008-02-06 14:49:44 +01:00 committed by Takashi Iwai
parent d043143d80
commit b76c850fbc
1 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
sound/pci/hda/patch_sigmatel.c
View File

@ -136,6 +136,7 @@ struct sigmatel_spec {
/* power management */
unsigned int num_pwrs;
hda_nid_t *pwr_nids;
hda_nid_t *dac_list;
/* playback */
struct hda_input_mux *mono_mux;
@ -291,6 +292,10 @@ static hda_nid_t stac927x_mux_nids[3] = {
0x15, 0x16, 0x17
};
static hda_nid_t stac927x_dac_nids[6] = {
0x02, 0x03, 0x04, 0x05, 0x06, 0
};
static hda_nid_t stac927x_dmux_nids[1] = {
0x1b,
};
@ -2877,6 +2882,18 @@ static int is_nid_hp_pin(struct auto_pin_cfg *cfg, hda_nid_t nid)
return 0; /* nid is not a HP-Out */
};
static void stac92xx_power_down(struct hda_codec *codec)
{
struct sigmatel_spec *spec = codec->spec;
/* power down inactive DACs */
hda_nid_t *dac;
for (dac = spec->dac_list; *dac; dac++)
if (!is_in_dac_nids(spec, *dac))
snd_hda_codec_write_cache(codec, *dac, 0,
AC_VERB_SET_POWER_STATE, AC_PWRST_D3);
}
static int stac92xx_init(struct hda_codec *codec)
{
struct sigmatel_spec *spec = codec->spec;
@ -2929,7 +2946,8 @@ static int stac92xx_init(struct hda_codec *codec)
enable_pin_detect(codec, spec->pwr_nids[i], event | i);
codec->patch_ops.unsol_event(codec, (event | i) << 26);
}
if (spec->dac_list)
stac92xx_power_down(codec);
if (cfg->dig_out_pin)
stac92xx_auto_set_pinctl(codec, cfg->dig_out_pin,
AC_PINCTL_OUT_EN);
@ -3102,6 +3120,9 @@ static int stac92xx_resume(struct hda_codec *codec)
spec->gpio_dir, spec->gpio_data);
snd_hda_codec_resume_amp(codec);
snd_hda_codec_resume_cache(codec);
/* power down inactive DACs */
if (spec->dac_list)
stac92xx_power_down(codec);
/* invoke unsolicited event to reset the HP state */
if (spec->hp_detect)
codec->patch_ops.unsol_event(codec, STAC_HP_EVENT << 26);
@ -3589,6 +3610,7 @@ static int patch_stac927x(struct hda_codec *codec)
spec->num_adcs = ARRAY_SIZE(stac927x_adc_nids);
spec->mux_nids = stac927x_mux_nids;
spec->num_muxes = ARRAY_SIZE(stac927x_mux_nids);
spec->dac_list = stac927x_dac_nids;
spec->multiout.dac_nids = spec->dac_nids;
switch (spec->board_config) {