[PATCH 0/4] More aggressive PM for HD-audio

Takashi Iwai
2015-03-18T08:51:01Z

Hi,

here is a patchset for supporting more aggressive PM for HD-audio.
This allows to change the power state of each widget more dynamically
with jack and stream states. It's activated only when the codec
driver (or via sysfs or f/w patch) sets codec->power_mgmt flag.

In theory, this should work for the recent Realtek codecs, but
currently I have no machine for test.

David, could you or your team check whether this works for ALC282 or
such? Just add like:

--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5415,6 +5415,7 @@ static int patch_alc269(struct hda_codec *codec)

spec = codec->spec;
spec->gen.shared_mic_vref_pin = 0x18;
+ codec->power_mgmt = 1;

snd_hda_pick_fixup(codec, alc269_fixup_models,
alc269_fixup_tbl, alc269_fixups);

The patchset is for for-next branch of sound git tree, but they might
be applicable to 4.0-rc (or even older), too. The current patches are
found in topic/hda-power branch.

thanks,

Takashi

===

Takashi Iwai (4):
ALSA: hda - Simplify PCM setup overrides
ALSA: hda - Support advanced power state controls
ALSA: hda - Use the new power control for VIA codecs
ALSA: hda - Adjust power of beep widget and outputs

sound/pci/hda/hda_beep.c | 29 +-
sound/pci/hda/hda_beep.h | 1 +
sound/pci/hda/hda_codec.c | 4 +
sound/pci/hda/hda_codec.h | 2 +
sound/pci/hda/hda_generic.c | 480 ++++++++++++++++++++++++------
sound/pci/hda/hda_generic.h | 5 +-
sound/pci/hda/patch_realtek.c | 41 ---
sound/pci/hda/patch_sigmatel.c | 5 +
sound/pci/hda/patch_via.c | 662 +----------------------------------------
9 files changed, 427 insertions(+), 802 deletions(-)

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2.3.3