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ALSA: hda - Add snd_hda_check_power_state() helper function 

... for small refactoring.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2013-01-24 17:47:17 +01:00
parent b9c590bbf1
commit 9040d102da
3 changed files with 18 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sound/pci/hda/hda_codec.c
View File

@ -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);
}

13
sound/pci/hda/hda_local.h
View File

@ -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
*/

11
sound/pci/hda/patch_via.c
View File

@ -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))