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| author | Takashi Iwai <tiwai@suse.de> | 2013-01-24 17:47:17 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-01-24 17:47:17 +0100 |
| commit | 9040d102da5635abc306372bb4dbffaba92c478e (patch) | |
| tree | b6674ae2c98ab64d78c78b7623e51e676bacd55f | |
| parent | b9c590bbf1d7621c3f9feb6ac0992d638244d0b1 (diff) | |
| download | talos-op-linux-9040d102da5635abc306372bb4dbffaba92c478e.tar.gz talos-op-linux-9040d102da5635abc306372bb4dbffaba92c478e.zip | |
ALSA: hda - Add snd_hda_check_power_state() helper function
... for small refactoring.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 9 | ||||
| -rw-r--r-- | sound/pci/hda/hda_local.h | 13 | ||||
| -rw-r--r-- | sound/pci/hda/patch_via.c | 11 |
3 files changed, 18 insertions, 15 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 2311114bf52c..f82a64da2f1b 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -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); } diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index 2ff62dcf2fcb..05f1d594d17b 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -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 */ diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c index 5bd4b0c10003..9641c0e487bb 100644 --- a/sound/pci/hda/patch_via.c +++ b/sound/pci/hda/patch_via.c @@ -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)) |
