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Commit b76c850f authored by Matt Ranostay's avatar Matt Ranostay Committed by Takashi Iwai
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[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: default avatarMatthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent d043143d

sound/pci/hda/patch_sigmatel.c

+23 −1
Original line number Diff line number Diff line
@@ -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) {