diff options
| author | Takashi Iwai <tiwai@suse.de> | 2013-05-14 12:58:47 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-05-16 07:18:05 +0200 |
| commit | b1b9fbd0507aac4ddce14f513d52332f50be89dc (patch) | |
| tree | ba4c2850727eb85cf6342ec7ce8d584a66ff7c53 /sound/pci | |
| parent | a62ee234a572b4c98fe98cf5fb18e4e8b0f6e43d (diff) | |
| download | linux-b1b9fbd0507aac4ddce14f513d52332f50be89dc.tar.gz | |
ALSA: hda - Check the activity of the NID to be powered down
When an inactive path is powered down with spec->power_down_unused
flag, we should check the activity of each widget in the path whether
it's still referred from any active path.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_generic.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c index ac079f93c535..ae85bbd2e6f8 100644 --- a/sound/pci/hda/hda_generic.c +++ b/sound/pci/hda/hda_generic.c @@ -606,6 +606,10 @@ static bool is_active_nid(struct hda_codec *codec, hda_nid_t nid, return false; } +/* check whether the NID is referred by any active paths */ +#define is_active_nid_for_any(codec, nid) \ + is_active_nid(codec, nid, HDA_OUTPUT, 0) + /* get the default amp value for the target state */ static int get_amp_val_to_activate(struct hda_codec *codec, hda_nid_t nid, int dir, unsigned int caps, bool enable) @@ -759,7 +763,8 @@ static void path_power_down_sync(struct hda_codec *codec, struct nid_path *path) for (i = 0; i < path->depth; i++) { hda_nid_t nid = path->path[i]; - if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D3)) { + if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D3) && + !is_active_nid_for_any(codec, nid)) { snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_POWER_STATE, AC_PWRST_D3); @@ -4157,7 +4162,7 @@ static unsigned int snd_hda_gen_path_power_filter(struct hda_codec *codec, return power_state; if (get_wcaps_type(get_wcaps(codec, nid)) >= AC_WID_POWER) return power_state; - if (is_active_nid(codec, nid, HDA_OUTPUT, 0)) + if (is_active_nid_for_any(codec, nid)) return power_state; return AC_PWRST_D3; } |