diff options
| author |   Wang Xingchao <xingchao.wang@linux.intel.com> | 2013-07-25 23:34:46 -0400 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2013-07-29 14:33:20 +0200 |
| commit | 7d4f606c50ffaaa3ac60b7faf770dc6e84af3207 (patch) | |
| tree | b833c9ec23b4496a61e96d7887469c3bf47722af /sound/pci | |
| parent | ALSA: hda - jack poll once if jackpoll_interval==0 (diff) | |
| download | linux-dev-7d4f606c50ffaaa3ac60b7faf770dc6e84af3207.tar.xz linux-dev-7d4f606c50ffaaa3ac60b7faf770dc6e84af3207.zip | |
ALSA: hda - WAKEEN feature enabling for runtime pm
With runtime power save feature enabled, Headphone hotplug
event will not be detected while controller/codec in D3. HDA has
feature WAKEEN to let codec wake up system if controller is in D3 or
system in S3.(HDA Spec 4.5.9.2/3). Codec can send out INT or wake up
controller depending on whether CIE or GIE enabled.(Figure 4, Interupt
structure).
The controller must be in RESET mode after enter runtime-suspend, otherwise
it will not be waken up even if codec send out wake-up event. And STATESTS
will be cleared after controller brought out of RESET mode.
This patch only enable WAKEEN for runtime-suspend(Controller D3) mode,
not for system S3 mode. with tool "evtest", Headphone hotplug events
could be cought and reported successfully.
[fixed an unused variable warning by tiwai]
Signed-off-by: Wang Xingchao <xingchao.wang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 3f16c4bafc1a..7f9e4062a8d7 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2971,6 +2971,10 @@ static int azx_runtime_suspend(struct device *dev) struct snd_card *card = dev_get_drvdata(dev); struct azx *chip = card->private_data; + /* enable controller wake up event */ + azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) | + STATESTS_INT_MASK); + azx_stop_chip(chip); azx_enter_link_reset(chip); azx_clear_irq_pending(chip); @@ -2983,11 +2987,31 @@ static int azx_runtime_resume(struct device *dev) { struct snd_card *card = dev_get_drvdata(dev); struct azx *chip = card->private_data; + struct hda_bus *bus; + struct hda_codec *codec; + int status; if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) hda_display_power(true); + + /* Read STATESTS before controller reset */ + status = azx_readw(chip, STATESTS); + azx_init_pci(chip); azx_init_chip(chip, 1); + + bus = chip->bus; + if (status && bus) { + list_for_each_entry(codec, &bus->codec_list, list) + if (status & (1 << codec->addr)) + queue_delayed_work(codec->bus->workq, + &codec->jackpoll_work, codec->jackpoll_interval); + } + + /* disable controller Wake Up event*/ + azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) & + ~STATESTS_INT_MASK); + return 0; } |