diff options
| author | Takashi Iwai <tiwai@suse.de> | 2012-05-18 16:06:12 +0530 |
|---|---|---|
| committer | Varun Wadekar <vwadekar@nvidia.com> | 2012-05-18 16:06:12 +0530 |
| commit | 06f64e34ec1d48b183598e668fe549a5319e87cd (patch) | |
| tree | 8099def916681b9e08c7a2e5200b372b1a600fe8 /sound/pci | |
| parent | 0bddcaa44273bc0259a23a2362f5d427c7d277d5 (diff) | |
Revert "ALSA: hda - Set codec to D3 forcibly even if not used"
This reverts commit 785f857d1cb0856b612b46a0545b74aa2596e44a.
The commit causes a problem with the wrong D3 state after suspend
because the call of hda_set_power_state() involves with the power-up
sequence, which changes the power_count, and this confuses the resume
sequence that checks the power_count as well.
Originally, this go-to-D3 sequence should be a simple task without the
power-up sequence. But, it'd need some proper sanity checks in the
case of power-saved state, so it's not too easy to write now in the
3.4-rc cycle.
In short, the safest option now is to revert this affecting commit.
Of course, we need to clean up and robustify the power-saving code
better for 3.5 kernel.
Reported-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Conflicts:
sound/pci/hda/hda_intel.c
Change-Id: I9b677120adc4b281f82b595a85efb4e052410dfe
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 4 | ||||
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 14 |
2 files changed, 13 insertions, 5 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index ba6d05b88837..60d7af5b21ca 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -5469,10 +5469,6 @@ int snd_hda_suspend(struct hda_bus *bus) list_for_each_entry(codec, &bus->codec_list, list) { if (hda_codec_is_power_on(codec)) hda_call_codec_suspend(codec); - else /* forcibly change the power to D3 even if not used */ - hda_set_power_state(codec, - codec->afg ? codec->afg : codec->mfg, - AC_PWRST_D3); if (codec->patch_ops.post_suspend) codec->patch_ops.post_suspend(codec); } diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 661a8935fddf..1c0d5de677eb 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2525,6 +2525,17 @@ static void azx_power_notify(struct hda_bus *bus) * power management */ +static int snd_hda_codecs_inuse(struct hda_bus *bus) +{ + struct hda_codec *codec; + + list_for_each_entry(codec, &bus->codec_list, list) { + if (snd_hda_codec_needs_resume(codec)) + return 1; + } + return 0; +} + static int azx_suspend(struct azx *chip, pm_message_t state) { struct snd_card *card = chip->card; @@ -2603,7 +2614,8 @@ static int azx_resume(struct azx *chip) azx_init_platform(chip); #endif - azx_init_chip(chip, 1); + if (snd_hda_codecs_inuse(chip->bus)) + azx_init_chip(chip, 1); snd_hda_resume(chip->bus); snd_power_change_state(card, SNDRV_CTL_POWER_D0); |