diff options
| 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 | |
| parent | ALSA: hda - allow a codec to control the link power (diff) | |
| download | linux-dev-17eccb27fce7cac8469dd9e828645a3ba256fc1e.tar.xz linux-dev-17eccb27fce7cac8469dd9e828645a3ba256fc1e.zip | |
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')
| -rw-r--r-- | sound/pci/hda/hda_controller.c | 11 | ||||
| -rw-r--r-- | sound/pci/hda/hda_controller.h | 2 | ||||
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 9 |
3 files changed, 22 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c index e0bb6231ff0c..120854ebd054 100644 --- a/sound/pci/hda/hda_controller.c +++ b/sound/pci/hda/hda_controller.c @@ -775,9 +775,20 @@ static int azx_get_response(struct hdac_bus *bus, unsigned int addr, return azx_rirb_get_response(bus, addr, res); } +static int azx_link_power(struct hdac_bus *bus, bool enable) +{ + struct azx *chip = bus_to_azx(bus); + + if (chip->ops->link_power) + return chip->ops->link_power(chip, enable); + else + return -EINVAL; +} + static const struct hdac_bus_ops bus_core_ops = { .command = azx_send_cmd, .get_response = azx_get_response, + .link_power = azx_link_power, }; #ifdef CONFIG_SND_HDA_DSP_LOADER diff --git a/sound/pci/hda/hda_controller.h b/sound/pci/hda/hda_controller.h index 173bf7c85b6e..3d26e613ab67 100644 --- a/sound/pci/hda/hda_controller.h +++ b/sound/pci/hda/hda_controller.h @@ -89,6 +89,8 @@ struct hda_controller_ops { struct vm_area_struct *area); /* Check if current position is acceptable */ int (*position_check)(struct azx *chip, struct azx_dev *azx_dev); + /* enable/disable the link power */ + int (*link_power)(struct azx *chip, bool enable); }; struct azx_pcm { 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, |