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>
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 2b823d4..d7922a6 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -540,6 +540,14 @@
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 @@
.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,