diff options
| author | Mengdong Lin <mengdong.lin@intel.com> | 2015-04-29 17:43:12 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-04-29 12:27:52 +0200 |
| commit | d4b7b13e19258a848da920502e27526f36c5a59d (patch) | |
| tree | fd2a55f49787b4621511bfd6b9aca7475f7a88d4 /sound/pci/hda/hda_i915.c | |
| parent | 0dd76f36efa43fa75a568b0d24736a9e51d51170 (diff) | |
ALSA: hda - implement a refcount for i915 power well switch
This is to check the refcount of audio driver and reduce calling to i915.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_i915.c')
| -rw-r--r-- | sound/pci/hda/hda_i915.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/sound/pci/hda/hda_i915.c b/sound/pci/hda/hda_i915.c index 52a85d87c23c..b648928b6415 100644 --- a/sound/pci/hda/hda_i915.c +++ b/sound/pci/hda/hda_i915.c @@ -42,10 +42,15 @@ int hda_display_power(struct hda_intel *hda, bool enable) dev_dbg(&hda->chip.pci->dev, "display power %s\n", enable ? "enable" : "disable"); - if (enable) - acomp->ops->get_power(acomp->dev); - else - acomp->ops->put_power(acomp->dev); + + if (enable) { + if (!hda->i915_power_refcount++) + acomp->ops->get_power(acomp->dev); + } else { + WARN_ON(!hda->i915_power_refcount); + if (!--hda->i915_power_refcount) + acomp->ops->put_power(acomp->dev); + } return 0; } @@ -183,6 +188,11 @@ out_err: int hda_i915_exit(struct hda_intel *hda) { struct device *dev = &hda->chip.pci->dev; + struct i915_audio_component *acomp = &hda->audio_component; + + WARN_ON(hda->i915_power_refcount); + if (hda->i915_power_refcount > 0 && acomp->ops) + acomp->ops->put_power(acomp->dev); component_master_del(dev, &hda_component_master_ops); |