diff options
| author |   Jaya Kumar <jayakumar.lkml@gmail.com> | 2008-11-05 17:30:08 -0500 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2008-12-10 17:14:37 +0100 |
| commit | b035ce0f26812292d067fbe2fc9e9d88d5dfcdb4 (patch) | |
| tree | 5c2e30e9e73e2542e9c97de2d689af17db358b0f /sound/pci/cs5535audio/cs5535audio_pcm.c | |
| parent | ALSA: cs5535audio: stick AD1888 bitshift values into a header file (diff) | |
| download | linux-dev-b035ce0f26812292d067fbe2fc9e9d88d5dfcdb4.tar.xz linux-dev-b035ce0f26812292d067fbe2fc9e9d88d5dfcdb4.zip | |
ALSA: cs5535audio: turn off PCM properly if closing the audio device
As per <http://dev.laptop.org/ticket/1420>, we need to properly turn off
the PCM if we're closing the device in order to save power. This also
causes the MIC led to turn off properly.
Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/cs5535audio/cs5535audio_pcm.c')
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio_pcm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/pci/cs5535audio/cs5535audio_pcm.c b/sound/pci/cs5535audio/cs5535audio_pcm.c index cdcda87116c3..6aa0c19390d7 100644 --- a/sound/pci/cs5535audio/cs5535audio_pcm.c +++ b/sound/pci/cs5535audio/cs5535audio_pcm.c @@ -260,6 +260,9 @@ static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream, err = cs5535audio_build_dma_packets(cs5535au, dma, substream, params_periods(hw_params), params_period_bytes(hw_params)); + if (!err) + dma->pcm_open_flag = 1; + return err; } @@ -268,6 +271,15 @@ static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream) struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); struct cs5535audio_dma *dma = substream->runtime->private_data; + if (dma->pcm_open_flag) { + if (substream == cs5535au->playback_substream) + snd_ac97_update_power(cs5535au->ac97, + AC97_PCM_FRONT_DAC_RATE, 0); + else + snd_ac97_update_power(cs5535au->ac97, + AC97_PCM_LR_ADC_RATE, 0); + dma->pcm_open_flag = 0; + } cs5535audio_clear_dma_packets(cs5535au, dma, substream); return snd_pcm_lib_free_pages(substream); } |