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| author | Mengdong Lin <mengdong.lin@intel.com> | 2015-04-29 17:43:29 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-04-29 12:27:53 +0200 |
| commit | 17eccb27fce7cac8469dd9e828645a3ba256fc1e (patch) | |
| tree | 847fcecfd604da3b7b57746258bbd7509a6a34af /sound/pci/hda/hda_intel.c | |
| parent | a5e7e07c264bb76d0b7c782766989c491833de05 (diff) | |
| download | linux-17eccb27fce7cac8469dd9e828645a3ba256fc1e.tar.bz2 | |
ALSA: hda - implement link_power ops for i915 display power control
This patch implements the bus link_power ops to request/release i915 display
power well. It can be used by the display codec which shares this power well
with GPU on Intel platforms.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_intel.c')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 2b823d4ad888..d7922a6df91b 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -540,6 +540,14 @@ static int azx_position_check(struct azx *chip, struct azx_dev *azx_dev) return 0; } +/* Enable/disable i915 display power for the link */ +static int azx_intel_link_power(struct azx *chip, bool enable) +{ + struct hda_intel *hda = container_of(chip, struct hda_intel, chip); + + return hda_display_power(hda, enable); +} + /* * Check whether the current DMA position is acceptable for updating * periods. Returns non-zero if it's OK. @@ -1786,6 +1794,7 @@ static const struct hda_controller_ops pci_hda_ops = { .substream_free_pages = substream_free_pages, .pcm_mmap_prepare = pcm_mmap_prepare, .position_check = azx_position_check, + .link_power = azx_intel_link_power, }; static int azx_probe(struct pci_dev *pci, |