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Commit 9040d102 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Add snd_hda_check_power_state() helper function 



... for small refactoring.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent b9c590bb

sound/pci/hda/hda_codec.c

+2 −7
Original line number Diff line number Diff line
@@ -3779,18 +3779,13 @@ static void sync_power_up_states(struct hda_codec *codec) 


	for (i = 0; i < codec->num_nodes; i++, nid++) {

		unsigned int wcaps = get_wcaps(codec, nid);

		unsigned int state, target;

		unsigned int target;

		if (!(wcaps & AC_WCAP_POWER))

			continue;

		target = codec->power_filter(codec, nid, AC_PWRST_D0);

		if (target == AC_PWRST_D0)

			continue;

		state = snd_hda_codec_read(codec, nid, 0,

					   AC_VERB_GET_POWER_STATE, 0);

		if (state & AC_PWRST_ERROR)

			continue;

		state = (state >> 4) & 0x0f;

		if (state != target)

		if (!snd_hda_check_power_state(codec, nid, target))

			snd_hda_codec_write(codec, nid, 0,

					    AC_VERB_SET_POWER_STATE, target);

	}

sound/pci/hda/hda_local.h

+13 −0
Original line number Diff line number Diff line
@@ -657,6 +657,19 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec, 
				 struct hda_loopback_check *check,

				 hda_nid_t nid);



/* check whether the actual power state matches with the target state */

static inline bool

snd_hda_check_power_state(struct hda_codec *codec, hda_nid_t nid,

			  unsigned int target_state)

{

	unsigned int state = snd_hda_codec_read(codec, nid, 0,

						AC_VERB_GET_POWER_STATE, 0);

	if (state & AC_PWRST_ERROR)

		return true;

	state = (state >> 4) & 0x0f;

	return (state != target_state);

}



/*

 * AMP control callbacks

 */

sound/pci/hda/patch_via.c

+3 −8
Original line number Diff line number Diff line
@@ -240,10 +240,7 @@ static void set_widgets_power_state(struct hda_codec *codec) 
static void update_power_state(struct hda_codec *codec, hda_nid_t nid,

			       unsigned int parm)

{

	unsigned int state = snd_hda_codec_read(codec, nid, 0,

						AC_VERB_GET_POWER_STATE, 0);

	state = (state >> 4) & 0x0f;

	if (state == parm)

	if (snd_hda_check_power_state(codec, nid, parm))

		return;

	snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_POWER_STATE, parm);

}
@@ -253,10 +250,8 @@ static void update_conv_power_state(struct hda_codec *codec, hda_nid_t nid, 
{

	struct via_spec *spec = codec->spec;

	unsigned int format;

	unsigned int state = snd_hda_codec_read(codec, nid, 0,

						AC_VERB_GET_POWER_STATE, 0);

	state = (state >> 4) & 0x0f;

	if (state == parm)



	if (snd_hda_check_power_state(codec, nid, parm))

		return;

	format = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_CONV, 0);

	if (format && (spec->dac_stream_tag[index] != format))