[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>
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index f693011..7f506ef 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -136,6 +136,7 @@
/* 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 @@
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 @@
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 @@
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 @@
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 @@
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) {